2 * Atheros CARL9170 driver
4 * 802.11 xmit & status routines
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 <net/mac80211.h>
49 static inline unsigned int __carl9170_get_queue(struct ar9170 *ar,
52 if (unlikely(modparam_noht)) {
56 * This is just another workaround, until
57 * someone figures out how to get QoS and
58 * AMPDU to play nicely together.
65 static inline unsigned int carl9170_get_queue(struct ar9170 *ar,
68 return __carl9170_get_queue(ar, skb_get_queue_mapping(skb));
71 static bool is_mem_full(struct ar9170 *ar)
73 return (DIV_ROUND_UP(IEEE80211_MAX_FRAME_LEN, ar->fw.mem_block_size) >
74 atomic_read(&ar->mem_free_blocks));
77 static void carl9170_tx_accounting(struct ar9170 *ar, struct sk_buff *skb)
82 atomic_inc(&ar->tx_total_queued);
84 queue = skb_get_queue_mapping(skb);
85 spin_lock_bh(&ar->tx_stats_lock);
88 * The driver has to accept the frame, regardless if the queue is
89 * full to the brim, or not. We have to do the queuing internally,
90 * since mac80211 assumes that a driver which can operate with
91 * aggregated frames does not reject frames for this reason.
93 ar->tx_stats[queue].len++;
94 ar->tx_stats[queue].count++;
96 mem_full = is_mem_full(ar);
97 for (i = 0; i < ar->hw->queues; i++) {
98 if (mem_full || ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
99 ieee80211_stop_queue(ar->hw, i);
100 ar->queue_stop_timeout[i] = jiffies;
104 spin_unlock_bh(&ar->tx_stats_lock);
107 /* needs rcu_read_lock */
108 static struct ieee80211_sta *__carl9170_get_tx_sta(struct ar9170 *ar,
111 struct _carl9170_tx_superframe *super = (void *) skb->data;
112 struct ieee80211_hdr *hdr = (void *) super->frame_data;
113 struct ieee80211_vif *vif;
116 vif_id = (super->s.misc & CARL9170_TX_SUPER_MISC_VIF_ID) >>
117 CARL9170_TX_SUPER_MISC_VIF_ID_S;
119 if (WARN_ON_ONCE(vif_id >= AR9170_MAX_VIRTUAL_MAC))
122 vif = rcu_dereference(ar->vif_priv[vif_id].vif);
127 * Normally we should use wrappers like ieee80211_get_DA to get
128 * the correct peer ieee80211_sta.
130 * But there is a problem with indirect traffic (broadcasts, or
131 * data which is designated for other stations) in station mode.
132 * The frame will be directed to the AP for distribution and not
133 * to the actual destination.
136 return ieee80211_find_sta(vif, hdr->addr1);
139 static void carl9170_tx_ps_unblock(struct ar9170 *ar, struct sk_buff *skb)
141 struct ieee80211_sta *sta;
142 struct carl9170_sta_info *sta_info;
145 sta = __carl9170_get_tx_sta(ar, skb);
149 sta_info = (struct carl9170_sta_info *) sta->drv_priv;
150 if (atomic_dec_return(&sta_info->pending_frames) == 0)
151 ieee80211_sta_block_awake(ar->hw, sta, false);
157 static void carl9170_tx_accounting_free(struct ar9170 *ar, struct sk_buff *skb)
161 queue = skb_get_queue_mapping(skb);
163 spin_lock_bh(&ar->tx_stats_lock);
165 ar->tx_stats[queue].len--;
167 if (!is_mem_full(ar)) {
169 for (i = 0; i < ar->hw->queues; i++) {
170 if (ar->tx_stats[i].len >= CARL9170_NUM_TX_LIMIT_SOFT)
173 if (ieee80211_queue_stopped(ar->hw, i)) {
176 tmp = jiffies - ar->queue_stop_timeout[i];
177 if (tmp > ar->max_queue_stop_timeout[i])
178 ar->max_queue_stop_timeout[i] = tmp;
181 ieee80211_wake_queue(ar->hw, i);
185 spin_unlock_bh(&ar->tx_stats_lock);
187 if (atomic_dec_and_test(&ar->tx_total_queued))
188 complete(&ar->tx_flush);
191 static int carl9170_alloc_dev_space(struct ar9170 *ar, struct sk_buff *skb)
193 struct _carl9170_tx_superframe *super = (void *) skb->data;
197 atomic_inc(&ar->mem_allocs);
199 chunks = DIV_ROUND_UP(skb->len, ar->fw.mem_block_size);
200 if (unlikely(atomic_sub_return(chunks, &ar->mem_free_blocks) < 0)) {
201 atomic_add(chunks, &ar->mem_free_blocks);
205 spin_lock_bh(&ar->mem_lock);
206 cookie = bitmap_find_free_region(ar->mem_bitmap, ar->fw.mem_blocks, 0);
207 spin_unlock_bh(&ar->mem_lock);
209 if (unlikely(cookie < 0)) {
210 atomic_add(chunks, &ar->mem_free_blocks);
214 super = (void *) skb->data;
217 * Cookie #0 serves two special purposes:
218 * 1. The firmware might use it generate BlockACK frames
219 * in responds of an incoming BlockAckReqs.
221 * 2. Prevent double-free bugs.
223 super->s.cookie = (u8) cookie + 1;
227 static void carl9170_release_dev_space(struct ar9170 *ar, struct sk_buff *skb)
229 struct _carl9170_tx_superframe *super = (void *) skb->data;
232 /* make a local copy of the cookie */
233 cookie = super->s.cookie;
234 /* invalidate cookie */
238 * Do a out-of-bounds check on the cookie:
240 * * cookie "0" is reserved and won't be assigned to any
241 * out-going frame. Internally however, it is used to
242 * mark no longer/un-accounted frames and serves as a
243 * cheap way of preventing frames from being freed
244 * twice by _accident_. NB: There is a tiny race...
246 * * obviously, cookie number is limited by the amount
247 * of available memory blocks, so the number can
248 * never execeed the mem_blocks count.
250 if (unlikely(WARN_ON_ONCE(cookie == 0) ||
251 WARN_ON_ONCE(cookie > ar->fw.mem_blocks)))
254 atomic_add(DIV_ROUND_UP(skb->len, ar->fw.mem_block_size),
255 &ar->mem_free_blocks);
257 spin_lock_bh(&ar->mem_lock);
258 bitmap_release_region(ar->mem_bitmap, cookie - 1, 0);
259 spin_unlock_bh(&ar->mem_lock);
262 /* Called from any context */
263 static void carl9170_tx_release(struct kref *ref)
266 struct carl9170_tx_info *arinfo;
267 struct ieee80211_tx_info *txinfo;
270 arinfo = container_of(ref, struct carl9170_tx_info, ref);
271 txinfo = container_of((void *) arinfo, struct ieee80211_tx_info,
273 skb = container_of((void *) txinfo, struct sk_buff, cb);
276 if (WARN_ON_ONCE(!ar))
280 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20);
282 memset(&txinfo->status.ack_signal, 0,
283 sizeof(struct ieee80211_tx_info) -
284 offsetof(struct ieee80211_tx_info, status.ack_signal));
286 if (atomic_read(&ar->tx_total_queued))
287 ar->tx_schedule = true;
289 if (txinfo->flags & IEEE80211_TX_CTL_AMPDU) {
290 if (!atomic_read(&ar->tx_ampdu_upload))
291 ar->tx_ampdu_schedule = true;
293 if (txinfo->flags & IEEE80211_TX_STAT_AMPDU) {
294 struct _carl9170_tx_superframe *super;
296 super = (void *)skb->data;
297 txinfo->status.ampdu_len = super->s.rix;
298 txinfo->status.ampdu_ack_len = super->s.cnt;
299 } else if ((txinfo->flags & IEEE80211_TX_STAT_ACK) &&
300 !(txinfo->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)) {
302 * drop redundant tx_status reports:
304 * 1. ampdu_ack_len of the final tx_status does
305 * include the feedback of this particular frame.
307 * 2. tx_status_irqsafe only queues up to 128
308 * tx feedback reports and discards the rest.
310 * 3. minstrel_ht is picky, it only accepts
311 * reports of frames with the TX_STATUS_AMPDU flag.
313 * 4. mac80211 is not particularly interested in
314 * feedback either [CTL_REQ_TX_STATUS not set]
317 ieee80211_free_txskb(ar->hw, skb);
321 * Either the frame transmission has failed or
322 * mac80211 requested tx status.
327 skb_pull(skb, sizeof(struct _carl9170_tx_superframe));
328 ieee80211_tx_status_irqsafe(ar->hw, skb);
331 void carl9170_tx_get_skb(struct sk_buff *skb)
333 struct carl9170_tx_info *arinfo = (void *)
334 (IEEE80211_SKB_CB(skb))->rate_driver_data;
335 kref_get(&arinfo->ref);
338 int carl9170_tx_put_skb(struct sk_buff *skb)
340 struct carl9170_tx_info *arinfo = (void *)
341 (IEEE80211_SKB_CB(skb))->rate_driver_data;
343 return kref_put(&arinfo->ref, carl9170_tx_release);
346 /* Caller must hold the tid_info->lock & rcu_read_lock */
347 static void carl9170_tx_shift_bm(struct ar9170 *ar,
348 struct carl9170_sta_tid *tid_info, u16 seq)
352 off = SEQ_DIFF(seq, tid_info->bsn);
354 if (WARN_ON_ONCE(off >= CARL9170_BAW_BITS))
358 * Sanity check. For each MPDU we set the bit in bitmap and
359 * clear it once we received the tx_status.
360 * But if the bit is already cleared then we've been bitten
363 WARN_ON_ONCE(!test_and_clear_bit(off, tid_info->bitmap));
365 off = SEQ_DIFF(tid_info->snx, tid_info->bsn);
366 if (WARN_ON_ONCE(off >= CARL9170_BAW_BITS))
369 if (!bitmap_empty(tid_info->bitmap, off))
370 off = find_first_bit(tid_info->bitmap, off);
372 tid_info->bsn += off;
373 tid_info->bsn &= 0x0fff;
375 bitmap_shift_right(tid_info->bitmap, tid_info->bitmap,
376 off, CARL9170_BAW_BITS);
379 static void carl9170_tx_status_process_ampdu(struct ar9170 *ar,
380 struct sk_buff *skb, struct ieee80211_tx_info *txinfo)
382 struct _carl9170_tx_superframe *super = (void *) skb->data;
383 struct ieee80211_hdr *hdr = (void *) super->frame_data;
384 struct ieee80211_sta *sta;
385 struct carl9170_sta_info *sta_info;
386 struct carl9170_sta_tid *tid_info;
389 if (!(txinfo->flags & IEEE80211_TX_CTL_AMPDU) ||
390 txinfo->flags & IEEE80211_TX_CTL_INJECTED ||
391 (!(super->f.mac_control & cpu_to_le16(AR9170_TX_MAC_AGGR))))
395 sta = __carl9170_get_tx_sta(ar, skb);
399 tid = get_tid_h(hdr);
401 sta_info = (void *) sta->drv_priv;
402 tid_info = rcu_dereference(sta_info->agg[tid]);
406 spin_lock_bh(&tid_info->lock);
407 if (likely(tid_info->state >= CARL9170_TID_STATE_IDLE))
408 carl9170_tx_shift_bm(ar, tid_info, get_seq_h(hdr));
410 if (sta_info->stats[tid].clear) {
411 sta_info->stats[tid].clear = false;
412 sta_info->stats[tid].req = false;
413 sta_info->stats[tid].ampdu_len = 0;
414 sta_info->stats[tid].ampdu_ack_len = 0;
417 sta_info->stats[tid].ampdu_len++;
418 if (txinfo->status.rates[0].count == 1)
419 sta_info->stats[tid].ampdu_ack_len++;
421 if (!(txinfo->flags & IEEE80211_TX_STAT_ACK))
422 sta_info->stats[tid].req = true;
424 if (super->f.mac_control & cpu_to_le16(AR9170_TX_MAC_IMM_BA)) {
425 super->s.rix = sta_info->stats[tid].ampdu_len;
426 super->s.cnt = sta_info->stats[tid].ampdu_ack_len;
427 txinfo->flags |= IEEE80211_TX_STAT_AMPDU;
428 if (sta_info->stats[tid].req)
429 txinfo->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
431 sta_info->stats[tid].clear = true;
433 spin_unlock_bh(&tid_info->lock);
439 static void carl9170_tx_bar_status(struct ar9170 *ar, struct sk_buff *skb,
440 struct ieee80211_tx_info *tx_info)
442 struct _carl9170_tx_superframe *super = (void *) skb->data;
443 struct ieee80211_bar *bar = (void *) super->frame_data;
446 * Unlike all other frames, the status report for BARs does
447 * not directly come from the hardware as it is incapable of
448 * matching a BA to a previously send BAR.
449 * Instead the RX-path will scan for incoming BAs and set the
450 * IEEE80211_TX_STAT_ACK if it sees one that was likely
451 * caused by a BAR from us.
454 if (unlikely(ieee80211_is_back_req(bar->frame_control)) &&
455 !(tx_info->flags & IEEE80211_TX_STAT_ACK)) {
456 struct carl9170_bar_list_entry *entry;
457 int queue = skb_get_queue_mapping(skb);
460 list_for_each_entry_rcu(entry, &ar->bar_list[queue], list) {
461 if (entry->skb == skb) {
462 spin_lock_bh(&ar->bar_list_lock[queue]);
463 list_del_rcu(&entry->list);
464 spin_unlock_bh(&ar->bar_list_lock[queue]);
465 kfree_rcu(entry, head);
470 WARN(1, "bar not found in %d - ra:%pM ta:%pM c:%x ssn:%x\n",
471 queue, bar->ra, bar->ta, bar->control,
478 void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
481 struct ieee80211_tx_info *txinfo;
483 carl9170_tx_accounting_free(ar, skb);
485 txinfo = IEEE80211_SKB_CB(skb);
487 carl9170_tx_bar_status(ar, skb, txinfo);
490 txinfo->flags |= IEEE80211_TX_STAT_ACK;
492 ar->tx_ack_failures++;
494 if (txinfo->flags & IEEE80211_TX_CTL_AMPDU)
495 carl9170_tx_status_process_ampdu(ar, skb, txinfo);
497 carl9170_tx_ps_unblock(ar, skb);
498 carl9170_tx_put_skb(skb);
501 /* This function may be called form any context */
502 void carl9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
504 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
506 atomic_dec(&ar->tx_total_pending);
508 if (txinfo->flags & IEEE80211_TX_CTL_AMPDU)
509 atomic_dec(&ar->tx_ampdu_upload);
511 if (carl9170_tx_put_skb(skb))
512 tasklet_hi_schedule(&ar->usb_tasklet);
515 static struct sk_buff *carl9170_get_queued_skb(struct ar9170 *ar, u8 cookie,
516 struct sk_buff_head *queue)
520 spin_lock_bh(&queue->lock);
521 skb_queue_walk(queue, skb) {
522 struct _carl9170_tx_superframe *txc = (void *) skb->data;
524 if (txc->s.cookie != cookie)
527 __skb_unlink(skb, queue);
528 spin_unlock_bh(&queue->lock);
530 carl9170_release_dev_space(ar, skb);
533 spin_unlock_bh(&queue->lock);
538 static void carl9170_tx_fill_rateinfo(struct ar9170 *ar, unsigned int rix,
539 unsigned int tries, struct ieee80211_tx_info *txinfo)
543 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
544 if (txinfo->status.rates[i].idx < 0)
548 txinfo->status.rates[i].count = tries;
554 for (; i < IEEE80211_TX_MAX_RATES; i++) {
555 txinfo->status.rates[i].idx = -1;
556 txinfo->status.rates[i].count = 0;
560 static void carl9170_check_queue_stop_timeout(struct ar9170 *ar)
564 struct ieee80211_tx_info *txinfo;
565 struct carl9170_tx_info *arinfo;
566 bool restart = false;
568 for (i = 0; i < ar->hw->queues; i++) {
569 spin_lock_bh(&ar->tx_status[i].lock);
571 skb = skb_peek(&ar->tx_status[i]);
576 txinfo = IEEE80211_SKB_CB(skb);
577 arinfo = (void *) txinfo->rate_driver_data;
579 if (time_is_before_jiffies(arinfo->timeout +
580 msecs_to_jiffies(CARL9170_QUEUE_STUCK_TIMEOUT)) == true)
584 spin_unlock_bh(&ar->tx_status[i].lock);
589 * At least one queue has been stuck for long enough.
590 * Give the device a kick and hope it gets back to
593 * possible reasons may include:
594 * - frames got lost/corrupted (bad connection to the device)
595 * - stalled rx processing/usb controller hiccups
596 * - firmware errors/bugs
597 * - every bug you can think of.
598 * - all bugs you can't...
601 carl9170_restart(ar, CARL9170_RR_STUCK_TX);
605 static void carl9170_tx_ampdu_timeout(struct ar9170 *ar)
607 struct carl9170_sta_tid *iter;
609 struct ieee80211_tx_info *txinfo;
610 struct carl9170_tx_info *arinfo;
611 struct ieee80211_sta *sta;
614 list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {
615 if (iter->state < CARL9170_TID_STATE_IDLE)
618 spin_lock_bh(&iter->lock);
619 skb = skb_peek(&iter->queue);
623 txinfo = IEEE80211_SKB_CB(skb);
624 arinfo = (void *)txinfo->rate_driver_data;
625 if (time_is_after_jiffies(arinfo->timeout +
626 msecs_to_jiffies(CARL9170_QUEUE_TIMEOUT)))
629 sta = __carl9170_get_tx_sta(ar, skb);
633 ieee80211_stop_tx_ba_session(sta, iter->tid);
635 spin_unlock_bh(&iter->lock);
641 void carl9170_tx_janitor(struct work_struct *work)
643 struct ar9170 *ar = container_of(work, struct ar9170,
648 ar->tx_janitor_last_run = jiffies;
650 carl9170_check_queue_stop_timeout(ar);
651 carl9170_tx_ampdu_timeout(ar);
653 if (!atomic_read(&ar->tx_total_queued))
656 ieee80211_queue_delayed_work(ar->hw, &ar->tx_janitor,
657 msecs_to_jiffies(CARL9170_TX_TIMEOUT));
660 static void __carl9170_tx_process_status(struct ar9170 *ar,
661 const uint8_t cookie, const uint8_t info)
664 struct ieee80211_tx_info *txinfo;
665 unsigned int r, t, q;
668 q = ar9170_qmap[info & CARL9170_TX_STATUS_QUEUE];
670 skb = carl9170_get_queued_skb(ar, cookie, &ar->tx_status[q]);
673 * We have lost the race to another thread.
679 txinfo = IEEE80211_SKB_CB(skb);
681 if (!(info & CARL9170_TX_STATUS_SUCCESS))
684 r = (info & CARL9170_TX_STATUS_RIX) >> CARL9170_TX_STATUS_RIX_S;
685 t = (info & CARL9170_TX_STATUS_TRIES) >> CARL9170_TX_STATUS_TRIES_S;
687 carl9170_tx_fill_rateinfo(ar, r, t, txinfo);
688 carl9170_tx_status(ar, skb, success);
691 void carl9170_tx_process_status(struct ar9170 *ar,
692 const struct carl9170_rsp *cmd)
696 for (i = 0; i < cmd->hdr.ext; i++) {
697 if (WARN_ON(i > ((cmd->hdr.len / 2) + 1))) {
698 print_hex_dump_bytes("UU:", DUMP_PREFIX_NONE,
699 (void *) cmd, cmd->hdr.len + 4);
703 __carl9170_tx_process_status(ar, cmd->_tx_status[i].cookie,
704 cmd->_tx_status[i].info);
708 static void carl9170_tx_rate_tpc_chains(struct ar9170 *ar,
709 struct ieee80211_tx_info *info, struct ieee80211_tx_rate *txrate,
710 unsigned int *phyrate, unsigned int *tpc, unsigned int *chains)
712 struct ieee80211_rate *rate = NULL;
720 if (txrate->flags & IEEE80211_TX_RC_MCS) {
721 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
722 /* +1 dBm for HT40 */
725 if (info->band == IEEE80211_BAND_2GHZ)
726 txpower = ar->power_2G_ht40;
728 txpower = ar->power_5G_ht40;
730 if (info->band == IEEE80211_BAND_2GHZ)
731 txpower = ar->power_2G_ht20;
733 txpower = ar->power_5G_ht20;
736 *phyrate = txrate->idx;
737 *tpc += txpower[idx & 7];
739 if (info->band == IEEE80211_BAND_2GHZ) {
741 txpower = ar->power_2G_cck;
743 txpower = ar->power_2G_ofdm;
745 txpower = ar->power_5G_leg;
749 rate = &__carl9170_ratetable[idx];
750 *tpc += txpower[(rate->hw_value & 0x30) >> 4];
751 *phyrate = rate->hw_value & 0xf;
754 if (ar->eeprom.tx_mask == 1) {
755 *chains = AR9170_TX_PHY_TXCHAIN_1;
757 if (!(txrate->flags & IEEE80211_TX_RC_MCS) &&
758 rate && rate->bitrate >= 360)
759 *chains = AR9170_TX_PHY_TXCHAIN_1;
761 *chains = AR9170_TX_PHY_TXCHAIN_2;
764 *tpc = min_t(unsigned int, *tpc, ar->hw->conf.power_level * 2);
767 static __le32 carl9170_tx_physet(struct ar9170 *ar,
768 struct ieee80211_tx_info *info, struct ieee80211_tx_rate *txrate)
770 unsigned int power = 0, chains = 0, phyrate = 0;
773 tmp = cpu_to_le32(0);
775 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
776 tmp |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ <<
778 /* this works because 40 MHz is 2 and dup is 3 */
779 if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
780 tmp |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP <<
783 if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
784 tmp |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
786 if (txrate->flags & IEEE80211_TX_RC_MCS) {
787 SET_VAL(AR9170_TX_PHY_MCS, phyrate, txrate->idx);
789 /* heavy clip control */
790 tmp |= cpu_to_le32((txrate->idx & 0x7) <<
791 AR9170_TX_PHY_TX_HEAVY_CLIP_S);
793 tmp |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
796 * green field preamble does not work.
798 * if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
799 * tmp |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
802 if (info->band == IEEE80211_BAND_2GHZ) {
803 if (txrate->idx <= AR9170_TX_PHY_RATE_CCK_11M)
804 tmp |= cpu_to_le32(AR9170_TX_PHY_MOD_CCK);
806 tmp |= cpu_to_le32(AR9170_TX_PHY_MOD_OFDM);
808 tmp |= cpu_to_le32(AR9170_TX_PHY_MOD_OFDM);
812 * short preamble seems to be broken too.
814 * if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
815 * tmp |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
818 carl9170_tx_rate_tpc_chains(ar, info, txrate,
819 &phyrate, &power, &chains);
821 tmp |= cpu_to_le32(SET_CONSTVAL(AR9170_TX_PHY_MCS, phyrate));
822 tmp |= cpu_to_le32(SET_CONSTVAL(AR9170_TX_PHY_TX_PWR, power));
823 tmp |= cpu_to_le32(SET_CONSTVAL(AR9170_TX_PHY_TXCHAIN, chains));
827 static bool carl9170_tx_rts_check(struct ar9170 *ar,
828 struct ieee80211_tx_rate *rate,
829 bool ampdu, bool multi)
831 switch (ar->erp_mode) {
832 case CARL9170_ERP_AUTO:
836 case CARL9170_ERP_MAC80211:
837 if (!(rate->flags & IEEE80211_TX_RC_USE_RTS_CTS))
840 case CARL9170_ERP_RTS:
851 static bool carl9170_tx_cts_check(struct ar9170 *ar,
852 struct ieee80211_tx_rate *rate)
854 switch (ar->erp_mode) {
855 case CARL9170_ERP_AUTO:
856 case CARL9170_ERP_MAC80211:
857 if (!(rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT))
860 case CARL9170_ERP_CTS:
870 static int carl9170_tx_prepare(struct ar9170 *ar,
871 struct ieee80211_sta *sta,
874 struct ieee80211_hdr *hdr;
875 struct _carl9170_tx_superframe *txc;
876 struct carl9170_vif_info *cvif;
877 struct ieee80211_tx_info *info;
878 struct ieee80211_tx_rate *txrate;
879 struct carl9170_tx_info *arinfo;
880 unsigned int hw_queue;
886 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
887 BUILD_BUG_ON(sizeof(struct _carl9170_tx_superdesc) !=
888 CARL9170_TX_SUPERDESC_LEN);
890 BUILD_BUG_ON(sizeof(struct _ar9170_tx_hwdesc) !=
891 AR9170_TX_HWDESC_LEN);
893 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES < CARL9170_TX_MAX_RATES);
895 BUILD_BUG_ON(AR9170_MAX_VIRTUAL_MAC >
896 ((CARL9170_TX_SUPER_MISC_VIF_ID >>
897 CARL9170_TX_SUPER_MISC_VIF_ID_S) + 1));
899 hw_queue = ar9170_qmap[carl9170_get_queue(ar, skb)];
901 hdr = (void *)skb->data;
902 info = IEEE80211_SKB_CB(skb);
906 * Note: If the frame was sent through a monitor interface,
907 * the ieee80211_vif pointer can be NULL.
909 if (likely(info->control.vif))
910 cvif = (void *) info->control.vif->drv_priv;
914 txc = (void *)skb_push(skb, sizeof(*txc));
915 memset(txc, 0, sizeof(*txc));
917 SET_VAL(CARL9170_TX_SUPER_MISC_QUEUE, txc->s.misc, hw_queue);
920 SET_VAL(CARL9170_TX_SUPER_MISC_VIF_ID, txc->s.misc, cvif->id);
922 if (unlikely(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM))
923 txc->s.misc |= CARL9170_TX_SUPER_MISC_CAB;
925 if (unlikely(info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ))
926 txc->s.misc |= CARL9170_TX_SUPER_MISC_ASSIGN_SEQ;
928 if (unlikely(ieee80211_is_probe_resp(hdr->frame_control)))
929 txc->s.misc |= CARL9170_TX_SUPER_MISC_FILL_IN_TSF;
931 mac_tmp = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
932 AR9170_TX_MAC_BACKOFF);
933 mac_tmp |= cpu_to_le16((hw_queue << AR9170_TX_MAC_QOS_S) &
936 no_ack = !!(info->flags & IEEE80211_TX_CTL_NO_ACK);
937 if (unlikely(no_ack))
938 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
940 if (info->control.hw_key) {
941 len += info->control.hw_key->icv_len;
943 switch (info->control.hw_key->cipher) {
944 case WLAN_CIPHER_SUITE_WEP40:
945 case WLAN_CIPHER_SUITE_WEP104:
946 case WLAN_CIPHER_SUITE_TKIP:
947 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_ENCR_RC4);
949 case WLAN_CIPHER_SUITE_CCMP:
950 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_ENCR_AES);
958 ampdu = !!(info->flags & IEEE80211_TX_CTL_AMPDU);
960 unsigned int density, factor;
962 if (unlikely(!sta || !cvif))
965 factor = min_t(unsigned int, 1u, sta->ht_cap.ampdu_factor);
966 density = sta->ht_cap.ampdu_density;
972 * Otus uses slightly different density values than
973 * those from the 802.11n spec.
976 density = max_t(unsigned int, density + 1, 7u);
979 SET_VAL(CARL9170_TX_SUPER_AMPDU_DENSITY,
980 txc->s.ampdu_settings, density);
982 SET_VAL(CARL9170_TX_SUPER_AMPDU_FACTOR,
983 txc->s.ampdu_settings, factor);
985 for (i = 0; i < CARL9170_TX_MAX_RATES; i++) {
986 txrate = &info->control.rates[i];
987 if (txrate->idx >= 0) {
989 CARL9170_TX_SUPER_RI_AMPDU;
991 if (WARN_ON(!(txrate->flags &
992 IEEE80211_TX_RC_MCS))) {
994 * Not sure if it's even possible
995 * to aggregate non-ht rates with
1004 txrate->count = ar->hw->max_rate_tries;
1007 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_AGGR);
1011 * NOTE: For the first rate, the ERP & AMPDU flags are directly
1012 * taken from mac_control. For all fallback rate, the firmware
1013 * updates the mac_control flags from the rate info field.
1015 for (i = 1; i < CARL9170_TX_MAX_RATES; i++) {
1016 txrate = &info->control.rates[i];
1017 if (txrate->idx < 0)
1020 SET_VAL(CARL9170_TX_SUPER_RI_TRIES, txc->s.ri[i],
1023 if (carl9170_tx_rts_check(ar, txrate, ampdu, no_ack))
1024 txc->s.ri[i] |= (AR9170_TX_MAC_PROT_RTS <<
1025 CARL9170_TX_SUPER_RI_ERP_PROT_S);
1026 else if (carl9170_tx_cts_check(ar, txrate))
1027 txc->s.ri[i] |= (AR9170_TX_MAC_PROT_CTS <<
1028 CARL9170_TX_SUPER_RI_ERP_PROT_S);
1030 txc->s.rr[i - 1] = carl9170_tx_physet(ar, info, txrate);
1033 txrate = &info->control.rates[0];
1034 SET_VAL(CARL9170_TX_SUPER_RI_TRIES, txc->s.ri[0], txrate->count);
1036 if (carl9170_tx_rts_check(ar, txrate, ampdu, no_ack))
1037 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
1038 else if (carl9170_tx_cts_check(ar, txrate))
1039 mac_tmp |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
1041 txc->s.len = cpu_to_le16(skb->len);
1042 txc->f.length = cpu_to_le16(len + FCS_LEN);
1043 txc->f.mac_control = mac_tmp;
1044 txc->f.phy_control = carl9170_tx_physet(ar, info, txrate);
1046 arinfo = (void *)info->rate_driver_data;
1047 arinfo->timeout = jiffies;
1049 kref_init(&arinfo->ref);
1053 skb_pull(skb, sizeof(*txc));
1057 static void carl9170_set_immba(struct ar9170 *ar, struct sk_buff *skb)
1059 struct _carl9170_tx_superframe *super;
1061 super = (void *) skb->data;
1062 super->f.mac_control |= cpu_to_le16(AR9170_TX_MAC_IMM_BA);
1065 static void carl9170_set_ampdu_params(struct ar9170 *ar, struct sk_buff *skb)
1067 struct _carl9170_tx_superframe *super;
1070 super = (void *) skb->data;
1072 tmp = (super->s.ampdu_settings & CARL9170_TX_SUPER_AMPDU_DENSITY) <<
1073 CARL9170_TX_SUPER_AMPDU_DENSITY_S;
1076 * If you haven't noticed carl9170_tx_prepare has already filled
1077 * in all ampdu spacing & factor parameters.
1078 * Now it's the time to check whenever the settings have to be
1079 * updated by the firmware, or if everything is still the same.
1081 * There's no sane way to handle different density values with
1082 * this hardware, so we may as well just do the compare in the
1086 if (tmp != ar->current_density) {
1087 ar->current_density = tmp;
1088 super->s.ampdu_settings |=
1089 CARL9170_TX_SUPER_AMPDU_COMMIT_DENSITY;
1092 tmp = (super->s.ampdu_settings & CARL9170_TX_SUPER_AMPDU_FACTOR) <<
1093 CARL9170_TX_SUPER_AMPDU_FACTOR_S;
1095 if (tmp != ar->current_factor) {
1096 ar->current_factor = tmp;
1097 super->s.ampdu_settings |=
1098 CARL9170_TX_SUPER_AMPDU_COMMIT_FACTOR;
1102 static bool carl9170_tx_rate_check(struct ar9170 *ar, struct sk_buff *_dest,
1103 struct sk_buff *_src)
1105 struct _carl9170_tx_superframe *dest, *src;
1107 dest = (void *) _dest->data;
1108 src = (void *) _src->data;
1111 * The mac80211 rate control algorithm expects that all MPDUs in
1112 * an AMPDU share the same tx vectors.
1113 * This is not really obvious right now, because the hardware
1114 * does the AMPDU setup according to its own rulebook.
1115 * Our nicely assembled, strictly monotonic increasing mpdu
1116 * chains will be broken up, mashed back together...
1119 return (dest->f.phy_control == src->f.phy_control);
1122 static void carl9170_tx_ampdu(struct ar9170 *ar)
1124 struct sk_buff_head agg;
1125 struct carl9170_sta_tid *tid_info;
1126 struct sk_buff *skb, *first;
1127 unsigned int i = 0, done_ampdus = 0;
1128 u16 seq, queue, tmpssn;
1130 atomic_inc(&ar->tx_ampdu_scheduler);
1131 ar->tx_ampdu_schedule = false;
1133 if (atomic_read(&ar->tx_ampdu_upload))
1136 if (!ar->tx_ampdu_list_len)
1139 __skb_queue_head_init(&agg);
1142 tid_info = rcu_dereference(ar->tx_ampdu_iter);
1143 if (WARN_ON_ONCE(!tid_info)) {
1149 list_for_each_entry_continue_rcu(tid_info, &ar->tx_ampdu_list, list) {
1152 if (tid_info->state < CARL9170_TID_STATE_PROGRESS)
1155 queue = TID_TO_WME_AC(tid_info->tid);
1157 spin_lock_bh(&tid_info->lock);
1158 if (tid_info->state != CARL9170_TID_STATE_XMIT)
1161 tid_info->counter++;
1162 first = skb_peek(&tid_info->queue);
1163 tmpssn = carl9170_get_seq(first);
1164 seq = tid_info->snx;
1166 if (unlikely(tmpssn != seq)) {
1167 tid_info->state = CARL9170_TID_STATE_IDLE;
1172 while ((skb = skb_peek(&tid_info->queue))) {
1173 /* strict 0, 1, ..., n - 1, n frame sequence order */
1174 if (unlikely(carl9170_get_seq(skb) != seq))
1177 /* don't upload more than AMPDU FACTOR allows. */
1178 if (unlikely(SEQ_DIFF(tid_info->snx, tid_info->bsn) >=
1179 (tid_info->max - 1)))
1182 if (!carl9170_tx_rate_check(ar, skb, first))
1185 atomic_inc(&ar->tx_ampdu_upload);
1186 tid_info->snx = seq = SEQ_NEXT(seq);
1187 __skb_unlink(skb, &tid_info->queue);
1189 __skb_queue_tail(&agg, skb);
1191 if (skb_queue_len(&agg) >= CARL9170_NUM_TX_AGG_MAX)
1195 if (skb_queue_empty(&tid_info->queue) ||
1196 carl9170_get_seq(skb_peek(&tid_info->queue)) !=
1199 * stop TID, if A-MPDU frames are still missing,
1200 * or whenever the queue is empty.
1203 tid_info->state = CARL9170_TID_STATE_IDLE;
1208 spin_unlock_bh(&tid_info->lock);
1210 if (skb_queue_empty(&agg))
1213 /* apply ampdu spacing & factor settings */
1214 carl9170_set_ampdu_params(ar, skb_peek(&agg));
1216 /* set aggregation push bit */
1217 carl9170_set_immba(ar, skb_peek_tail(&agg));
1219 spin_lock_bh(&ar->tx_pending[queue].lock);
1220 skb_queue_splice_tail_init(&agg, &ar->tx_pending[queue]);
1221 spin_unlock_bh(&ar->tx_pending[queue].lock);
1222 ar->tx_schedule = true;
1224 if ((done_ampdus++ == 0) && (i++ == 0))
1227 rcu_assign_pointer(ar->tx_ampdu_iter, tid_info);
1231 static struct sk_buff *carl9170_tx_pick_skb(struct ar9170 *ar,
1232 struct sk_buff_head *queue)
1234 struct sk_buff *skb;
1235 struct ieee80211_tx_info *info;
1236 struct carl9170_tx_info *arinfo;
1238 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1240 spin_lock_bh(&queue->lock);
1241 skb = skb_peek(queue);
1245 if (carl9170_alloc_dev_space(ar, skb))
1248 __skb_unlink(skb, queue);
1249 spin_unlock_bh(&queue->lock);
1251 info = IEEE80211_SKB_CB(skb);
1252 arinfo = (void *) info->rate_driver_data;
1254 arinfo->timeout = jiffies;
1258 spin_unlock_bh(&queue->lock);
1262 void carl9170_tx_drop(struct ar9170 *ar, struct sk_buff *skb)
1264 struct _carl9170_tx_superframe *super;
1269 super = (void *)skb->data;
1270 SET_VAL(CARL9170_TX_SUPER_MISC_QUEUE, q,
1271 ar9170_qmap[carl9170_get_queue(ar, skb)]);
1272 __carl9170_tx_process_status(ar, super->s.cookie, q);
1275 static bool carl9170_tx_ps_drop(struct ar9170 *ar, struct sk_buff *skb)
1277 struct ieee80211_sta *sta;
1278 struct carl9170_sta_info *sta_info;
1279 struct ieee80211_tx_info *tx_info;
1282 sta = __carl9170_get_tx_sta(ar, skb);
1286 sta_info = (void *) sta->drv_priv;
1287 tx_info = IEEE80211_SKB_CB(skb);
1289 if (unlikely(sta_info->sleeping) &&
1290 !(tx_info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
1291 IEEE80211_TX_CTL_CLEAR_PS_FILT))) {
1294 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1295 atomic_dec(&ar->tx_ampdu_upload);
1297 tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1298 carl9170_release_dev_space(ar, skb);
1299 carl9170_tx_status(ar, skb, false);
1308 static void carl9170_bar_check(struct ar9170 *ar, struct sk_buff *skb)
1310 struct _carl9170_tx_superframe *super = (void *) skb->data;
1311 struct ieee80211_bar *bar = (void *) super->frame_data;
1313 if (unlikely(ieee80211_is_back_req(bar->frame_control)) &&
1314 skb->len >= sizeof(struct ieee80211_bar)) {
1315 struct carl9170_bar_list_entry *entry;
1316 unsigned int queue = skb_get_queue_mapping(skb);
1318 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1319 if (!WARN_ON_ONCE(!entry)) {
1321 spin_lock_bh(&ar->bar_list_lock[queue]);
1322 list_add_tail_rcu(&entry->list, &ar->bar_list[queue]);
1323 spin_unlock_bh(&ar->bar_list_lock[queue]);
1328 static void carl9170_tx(struct ar9170 *ar)
1330 struct sk_buff *skb;
1332 bool schedule_garbagecollector = false;
1334 ar->tx_schedule = false;
1336 if (unlikely(!IS_STARTED(ar)))
1339 carl9170_usb_handle_tx_err(ar);
1341 for (i = 0; i < ar->hw->queues; i++) {
1342 while (!skb_queue_empty(&ar->tx_pending[i])) {
1343 skb = carl9170_tx_pick_skb(ar, &ar->tx_pending[i]);
1347 if (unlikely(carl9170_tx_ps_drop(ar, skb)))
1350 carl9170_bar_check(ar, skb);
1352 atomic_inc(&ar->tx_total_pending);
1354 q = __carl9170_get_queue(ar, i);
1356 * NB: tx_status[i] vs. tx_status[q],
1357 * TODO: Move into pick_skb or alloc_dev_space.
1359 skb_queue_tail(&ar->tx_status[q], skb);
1362 * increase ref count to "2".
1363 * Ref counting is the easiest way to solve the
1364 * race between the urb's completion routine:
1365 * carl9170_tx_callback
1366 * and wlan tx status functions:
1367 * carl9170_tx_status/janitor.
1369 carl9170_tx_get_skb(skb);
1371 carl9170_usb_tx(ar, skb);
1372 schedule_garbagecollector = true;
1376 if (!schedule_garbagecollector)
1379 ieee80211_queue_delayed_work(ar->hw, &ar->tx_janitor,
1380 msecs_to_jiffies(CARL9170_TX_TIMEOUT));
1383 static bool carl9170_tx_ampdu_queue(struct ar9170 *ar,
1384 struct ieee80211_sta *sta, struct sk_buff *skb)
1386 struct _carl9170_tx_superframe *super = (void *) skb->data;
1387 struct carl9170_sta_info *sta_info;
1388 struct carl9170_sta_tid *agg;
1389 struct sk_buff *iter;
1390 u16 tid, seq, qseq, off;
1393 tid = carl9170_get_tid(skb);
1394 seq = carl9170_get_seq(skb);
1395 sta_info = (void *) sta->drv_priv;
1398 agg = rcu_dereference(sta_info->agg[tid]);
1401 goto err_unlock_rcu;
1403 spin_lock_bh(&agg->lock);
1404 if (unlikely(agg->state < CARL9170_TID_STATE_IDLE))
1407 /* check if sequence is within the BA window */
1408 if (unlikely(!BAW_WITHIN(agg->bsn, CARL9170_BAW_BITS, seq)))
1411 if (WARN_ON_ONCE(!BAW_WITHIN(agg->snx, CARL9170_BAW_BITS, seq)))
1414 off = SEQ_DIFF(seq, agg->bsn);
1415 if (WARN_ON_ONCE(test_and_set_bit(off, agg->bitmap)))
1418 if (likely(BAW_WITHIN(agg->hsn, CARL9170_BAW_BITS, seq))) {
1419 __skb_queue_tail(&agg->queue, skb);
1424 skb_queue_reverse_walk(&agg->queue, iter) {
1425 qseq = carl9170_get_seq(iter);
1427 if (BAW_WITHIN(qseq, CARL9170_BAW_BITS, seq)) {
1428 __skb_queue_after(&agg->queue, iter, skb);
1433 __skb_queue_head(&agg->queue, skb);
1436 if (unlikely(agg->state != CARL9170_TID_STATE_XMIT)) {
1437 if (agg->snx == carl9170_get_seq(skb_peek(&agg->queue))) {
1438 agg->state = CARL9170_TID_STATE_XMIT;
1443 spin_unlock_bh(&agg->lock);
1449 spin_unlock_bh(&agg->lock);
1453 super->f.mac_control &= ~cpu_to_le16(AR9170_TX_MAC_AGGR);
1454 carl9170_tx_status(ar, skb, false);
1459 void carl9170_op_tx(struct ieee80211_hw *hw,
1460 struct ieee80211_tx_control *control,
1461 struct sk_buff *skb)
1463 struct ar9170 *ar = hw->priv;
1464 struct ieee80211_tx_info *info;
1465 struct ieee80211_sta *sta = control->sta;
1468 if (unlikely(!IS_STARTED(ar)))
1471 info = IEEE80211_SKB_CB(skb);
1473 if (unlikely(carl9170_tx_prepare(ar, sta, skb)))
1476 carl9170_tx_accounting(ar, skb);
1478 * from now on, one has to use carl9170_tx_status to free
1479 * all ressouces which are associated with the frame.
1483 struct carl9170_sta_info *stai = (void *) sta->drv_priv;
1484 atomic_inc(&stai->pending_frames);
1487 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1488 /* to static code analyzers and reviewers:
1489 * mac80211 guarantees that a valid "sta"
1490 * reference is present, if a frame is to
1491 * be part of an ampdu. Hence any extra
1492 * sta == NULL checks are redundant in this
1495 run = carl9170_tx_ampdu_queue(ar, sta, skb);
1497 carl9170_tx_ampdu(ar);
1500 unsigned int queue = skb_get_queue_mapping(skb);
1502 skb_queue_tail(&ar->tx_pending[queue], skb);
1510 ieee80211_free_txskb(ar->hw, skb);
1513 void carl9170_tx_scheduler(struct ar9170 *ar)
1516 if (ar->tx_ampdu_schedule)
1517 carl9170_tx_ampdu(ar);
1519 if (ar->tx_schedule)
1523 /* caller has to take rcu_read_lock */
1524 static struct carl9170_vif_info *carl9170_pick_beaconing_vif(struct ar9170 *ar)
1526 struct carl9170_vif_info *cvif;
1529 /* The AR9170 hardware has no fancy beacon queue or some
1530 * other scheduling mechanism. So, the driver has to make
1531 * due by setting the two beacon timers (pretbtt and tbtt)
1532 * once and then swapping the beacon address in the HW's
1533 * register file each time the pretbtt fires.
1536 cvif = rcu_dereference(ar->beacon_iter);
1537 if (ar->vifs > 0 && cvif) {
1539 list_for_each_entry_continue_rcu(cvif, &ar->vif_list,
1541 if (cvif->active && cvif->enable_beacon)
1544 } while (ar->beacon_enabled && i--);
1548 rcu_assign_pointer(ar->beacon_iter, cvif);
1552 static bool carl9170_tx_beacon_physet(struct ar9170 *ar, struct sk_buff *skb,
1553 u32 *ht1, u32 *plcp)
1555 struct ieee80211_tx_info *txinfo;
1556 struct ieee80211_tx_rate *rate;
1557 unsigned int power, chains;
1560 txinfo = IEEE80211_SKB_CB(skb);
1561 rate = &txinfo->control.rates[0];
1562 ht_rate = !!(txinfo->control.rates[0].flags & IEEE80211_TX_RC_MCS);
1563 carl9170_tx_rate_tpc_chains(ar, txinfo, rate, plcp, &power, &chains);
1565 *ht1 = AR9170_MAC_BCN_HT1_TX_ANT0;
1566 if (chains == AR9170_TX_PHY_TXCHAIN_2)
1567 *ht1 |= AR9170_MAC_BCN_HT1_TX_ANT1;
1568 SET_VAL(AR9170_MAC_BCN_HT1_PWR_CTRL, *ht1, 7);
1569 SET_VAL(AR9170_MAC_BCN_HT1_TPC, *ht1, power);
1570 SET_VAL(AR9170_MAC_BCN_HT1_CHAIN_MASK, *ht1, chains);
1573 *ht1 |= AR9170_MAC_BCN_HT1_HT_EN;
1574 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1575 *plcp |= AR9170_MAC_BCN_HT2_SGI;
1577 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
1578 *ht1 |= AR9170_MAC_BCN_HT1_BWC_40M_SHARED;
1579 *plcp |= AR9170_MAC_BCN_HT2_BW40;
1580 } else if (rate->flags & IEEE80211_TX_RC_DUP_DATA) {
1581 *ht1 |= AR9170_MAC_BCN_HT1_BWC_40M_DUP;
1582 *plcp |= AR9170_MAC_BCN_HT2_BW40;
1585 SET_VAL(AR9170_MAC_BCN_HT2_LEN, *plcp, skb->len + FCS_LEN);
1587 if (*plcp <= AR9170_TX_PHY_RATE_CCK_11M)
1588 *plcp |= ((skb->len + FCS_LEN) << (3 + 16)) + 0x0400;
1590 *plcp |= ((skb->len + FCS_LEN) << 16) + 0x0010;
1596 int carl9170_update_beacon(struct ar9170 *ar, const bool submit)
1598 struct sk_buff *skb = NULL;
1599 struct carl9170_vif_info *cvif;
1600 __le32 *data, *old = NULL;
1601 u32 word, ht1, plcp, off, addr, len;
1606 cvif = carl9170_pick_beaconing_vif(ar);
1610 skb = ieee80211_beacon_get_tim(ar->hw, carl9170_get_vif(cvif),
1618 spin_lock_bh(&ar->beacon_lock);
1619 data = (__le32 *)skb->data;
1621 old = (__le32 *)cvif->beacon->data;
1623 off = cvif->id * AR9170_MAC_BCN_LENGTH_MAX;
1624 addr = ar->fw.beacon_addr + off;
1625 len = roundup(skb->len + FCS_LEN, 4);
1627 if ((off + len) > ar->fw.beacon_max_len) {
1628 if (net_ratelimit()) {
1629 wiphy_err(ar->hw->wiphy, "beacon does not "
1630 "fit into device memory!\n");
1636 if (len > AR9170_MAC_BCN_LENGTH_MAX) {
1637 if (net_ratelimit()) {
1638 wiphy_err(ar->hw->wiphy, "no support for beacons "
1639 "bigger than %d (yours:%d).\n",
1640 AR9170_MAC_BCN_LENGTH_MAX, len);
1647 ht_rate = carl9170_tx_beacon_physet(ar, skb, &ht1, &plcp);
1649 carl9170_async_regwrite_begin(ar);
1650 carl9170_async_regwrite(AR9170_MAC_REG_BCN_HT1, ht1);
1652 carl9170_async_regwrite(AR9170_MAC_REG_BCN_HT2, plcp);
1654 carl9170_async_regwrite(AR9170_MAC_REG_BCN_PLCP, plcp);
1656 for (i = 0; i < DIV_ROUND_UP(skb->len, 4); i++) {
1658 * XXX: This accesses beyond skb data for up
1659 * to the last 3 bytes!!
1662 if (old && (data[i] == old[i]))
1665 word = le32_to_cpu(data[i]);
1666 carl9170_async_regwrite(addr + 4 * i, word);
1668 carl9170_async_regwrite_finish();
1670 dev_kfree_skb_any(cvif->beacon);
1671 cvif->beacon = NULL;
1673 err = carl9170_async_regwrite_result();
1676 spin_unlock_bh(&ar->beacon_lock);
1681 err = carl9170_bcn_ctrl(ar, cvif->id,
1682 CARL9170_BCN_CTRL_CAB_TRIGGER,
1683 addr, skb->len + FCS_LEN);
1693 spin_unlock_bh(&ar->beacon_lock);
1697 dev_kfree_skb_any(skb);