2 * Atheros AR9170 driver
4 * mac80211 interaction code
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, Christian Lamparter <chunkeey@web.de>
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/module.h>
42 #include <linux/etherdevice.h>
43 #include <net/mac80211.h>
48 static int modparam_nohwcrypt;
49 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
50 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
52 static int modparam_ht;
53 module_param_named(ht, modparam_ht, bool, S_IRUGO);
54 MODULE_PARM_DESC(ht, "enable MPDU aggregation.");
56 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
57 .bitrate = (_bitrate), \
59 .hw_value = (_hw_rate) | (_txpidx) << 4, \
62 static struct ieee80211_rate __ar9170_ratetable[] = {
64 RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
65 RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
66 RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
78 #define ar9170_g_ratetable (__ar9170_ratetable + 0)
79 #define ar9170_g_ratetable_size 12
80 #define ar9170_a_ratetable (__ar9170_ratetable + 4)
81 #define ar9170_a_ratetable_size 8
84 * NB: The hw_value is used as an index into the ar9170_phy_freq_params
85 * array in phy.c so that we don't have to do frequency lookups!
87 #define CHAN(_freq, _idx) { \
88 .center_freq = (_freq), \
90 .max_power = 18, /* XXX */ \
93 static struct ieee80211_channel ar9170_2ghz_chantable[] = {
110 static struct ieee80211_channel ar9170_5ghz_chantable[] = {
149 #define AR9170_HT_CAP \
151 .ht_supported = true, \
152 .cap = IEEE80211_HT_CAP_MAX_AMSDU | \
153 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
154 IEEE80211_HT_CAP_SGI_40 | \
155 IEEE80211_HT_CAP_GRN_FLD | \
156 IEEE80211_HT_CAP_DSSSCCK40 | \
157 IEEE80211_HT_CAP_SM_PS, \
159 .ampdu_density = 6, \
161 .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \
162 .rx_highest = cpu_to_le16(300), \
163 .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \
167 static struct ieee80211_supported_band ar9170_band_2GHz = {
168 .channels = ar9170_2ghz_chantable,
169 .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable),
170 .bitrates = ar9170_g_ratetable,
171 .n_bitrates = ar9170_g_ratetable_size,
172 .ht_cap = AR9170_HT_CAP,
175 static struct ieee80211_supported_band ar9170_band_5GHz = {
176 .channels = ar9170_5ghz_chantable,
177 .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable),
178 .bitrates = ar9170_a_ratetable,
179 .n_bitrates = ar9170_a_ratetable_size,
180 .ht_cap = AR9170_HT_CAP,
183 static void ar9170_tx(struct ar9170 *ar);
184 static bool ar9170_tx_ampdu(struct ar9170 *ar);
186 static inline u16 ar9170_get_seq_h(struct ieee80211_hdr *hdr)
188 return le16_to_cpu(hdr->seq_ctrl) >> 4;
191 static inline u16 ar9170_get_seq(struct sk_buff *skb)
193 struct ar9170_tx_control *txc = (void *) skb->data;
194 return ar9170_get_seq_h((void *) txc->frame_data);
197 static inline u16 ar9170_get_tid(struct sk_buff *skb)
199 struct ar9170_tx_control *txc = (void *) skb->data;
200 struct ieee80211_hdr *hdr = (void *) txc->frame_data;
202 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
205 #define GET_NEXT_SEQ(seq) ((seq + 1) & 0x0fff)
206 #define GET_NEXT_SEQ_FROM_SKB(skb) (GET_NEXT_SEQ(ar9170_get_seq(skb)))
208 #if (defined AR9170_QUEUE_DEBUG) || (defined AR9170_TXAGG_DEBUG)
209 static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
211 struct ar9170_tx_control *txc = (void *) skb->data;
212 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
213 struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
214 struct ieee80211_hdr *hdr = (void *) txc->frame_data;
216 printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x s:%d "
217 "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
218 wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
219 ieee80211_get_DA(hdr), arinfo->flags, ar9170_get_seq_h(hdr),
220 le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
221 jiffies_to_msecs(arinfo->timeout - jiffies));
224 static void __ar9170_dump_txqueue(struct ar9170 *ar,
225 struct sk_buff_head *queue)
230 printk(KERN_DEBUG "---[ cut here ]---\n");
231 printk(KERN_DEBUG "%s: %d entries in queue.\n",
232 wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
234 skb_queue_walk(queue, skb) {
235 printk(KERN_DEBUG "index:%d => \n", i++);
236 ar9170_print_txheader(ar, skb);
238 if (i != skb_queue_len(queue))
239 printk(KERN_DEBUG "WARNING: queue frame counter "
240 "mismatch %d != %d\n", skb_queue_len(queue), i);
241 printk(KERN_DEBUG "---[ end ]---\n");
243 #endif /* AR9170_QUEUE_DEBUG || AR9170_TXAGG_DEBUG */
245 #ifdef AR9170_QUEUE_DEBUG
246 static void ar9170_dump_txqueue(struct ar9170 *ar,
247 struct sk_buff_head *queue)
251 spin_lock_irqsave(&queue->lock, flags);
252 __ar9170_dump_txqueue(ar, queue);
253 spin_unlock_irqrestore(&queue->lock, flags);
255 #endif /* AR9170_QUEUE_DEBUG */
257 #ifdef AR9170_QUEUE_STOP_DEBUG
258 static void __ar9170_dump_txstats(struct ar9170 *ar)
262 printk(KERN_DEBUG "%s: QoS queue stats\n",
263 wiphy_name(ar->hw->wiphy));
265 for (i = 0; i < __AR9170_NUM_TXQ; i++)
266 printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d "
267 " stopped:%d\n", wiphy_name(ar->hw->wiphy), i,
268 ar->tx_stats[i].limit, ar->tx_stats[i].len,
269 skb_queue_len(&ar->tx_status[i]),
270 ieee80211_queue_stopped(ar->hw, i));
272 #endif /* AR9170_QUEUE_STOP_DEBUG */
274 #ifdef AR9170_TXAGG_DEBUG
275 static void ar9170_dump_tx_status_ampdu(struct ar9170 *ar)
279 spin_lock_irqsave(&ar->tx_status_ampdu.lock, flags);
280 printk(KERN_DEBUG "%s: A-MPDU tx_status queue => \n",
281 wiphy_name(ar->hw->wiphy));
282 __ar9170_dump_txqueue(ar, &ar->tx_status_ampdu);
283 spin_unlock_irqrestore(&ar->tx_status_ampdu.lock, flags);
286 #endif /* AR9170_TXAGG_DEBUG */
288 /* caller must guarantee exclusive access for _bin_ queue. */
289 static void ar9170_recycle_expired(struct ar9170 *ar,
290 struct sk_buff_head *queue,
291 struct sk_buff_head *bin)
293 struct sk_buff *skb, *old = NULL;
296 spin_lock_irqsave(&queue->lock, flags);
297 while ((skb = skb_peek(queue))) {
298 struct ieee80211_tx_info *txinfo;
299 struct ar9170_tx_info *arinfo;
301 txinfo = IEEE80211_SKB_CB(skb);
302 arinfo = (void *) txinfo->rate_driver_data;
304 if (time_is_before_jiffies(arinfo->timeout)) {
305 #ifdef AR9170_QUEUE_DEBUG
306 printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => "
307 "recycle \n", wiphy_name(ar->hw->wiphy),
308 jiffies, arinfo->timeout);
309 ar9170_print_txheader(ar, skb);
310 #endif /* AR9170_QUEUE_DEBUG */
311 __skb_unlink(skb, queue);
312 __skb_queue_tail(bin, skb);
317 if (unlikely(old == skb)) {
318 /* bail out - queue is shot. */
325 spin_unlock_irqrestore(&queue->lock, flags);
328 static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
331 struct ieee80211_tx_info *txinfo;
332 unsigned int retries = 0;
334 txinfo = IEEE80211_SKB_CB(skb);
335 ieee80211_tx_info_clear_status(txinfo);
338 case AR9170_TX_STATUS_RETRY:
340 case AR9170_TX_STATUS_COMPLETE:
341 txinfo->flags |= IEEE80211_TX_STAT_ACK;
344 case AR9170_TX_STATUS_FAILED:
345 retries = ar->hw->conf.long_frame_max_tx_count;
349 printk(KERN_ERR "%s: invalid tx_status response (%x).\n",
350 wiphy_name(ar->hw->wiphy), tx_status);
354 txinfo->status.rates[0].count = retries + 1;
355 skb_pull(skb, sizeof(struct ar9170_tx_control));
356 ieee80211_tx_status_irqsafe(ar->hw, skb);
359 static void ar9170_tx_fake_ampdu_status(struct ar9170 *ar)
361 struct sk_buff_head success;
364 unsigned long queue_bitmap = 0;
366 skb_queue_head_init(&success);
368 while (skb_queue_len(&ar->tx_status_ampdu) > AR9170_NUM_TX_STATUS)
369 __skb_queue_tail(&success, skb_dequeue(&ar->tx_status_ampdu));
371 ar9170_recycle_expired(ar, &ar->tx_status_ampdu, &success);
373 #ifdef AR9170_TXAGG_DEBUG
374 printk(KERN_DEBUG "%s: collected %d A-MPDU frames.\n",
375 wiphy_name(ar->hw->wiphy), skb_queue_len(&success));
376 __ar9170_dump_txqueue(ar, &success);
377 #endif /* AR9170_TXAGG_DEBUG */
379 while ((skb = __skb_dequeue(&success))) {
380 struct ieee80211_tx_info *txinfo;
382 queue_bitmap |= BIT(skb_get_queue_mapping(skb));
384 txinfo = IEEE80211_SKB_CB(skb);
385 ieee80211_tx_info_clear_status(txinfo);
387 txinfo->flags |= IEEE80211_TX_STAT_ACK;
388 txinfo->status.rates[0].count = 1;
390 skb_pull(skb, sizeof(struct ar9170_tx_control));
391 ieee80211_tx_status_irqsafe(ar->hw, skb);
394 for_each_bit(i, &queue_bitmap, BITS_PER_BYTE) {
395 #ifdef AR9170_QUEUE_STOP_DEBUG
396 printk(KERN_DEBUG "%s: wake queue %d\n",
397 wiphy_name(ar->hw->wiphy), i);
398 __ar9170_dump_txstats(ar);
399 #endif /* AR9170_QUEUE_STOP_DEBUG */
400 ieee80211_wake_queue(ar->hw, i);
407 static void ar9170_tx_ampdu_callback(struct ar9170 *ar, struct sk_buff *skb)
409 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
410 struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
412 arinfo->timeout = jiffies +
413 msecs_to_jiffies(AR9170_BA_TIMEOUT);
415 skb_queue_tail(&ar->tx_status_ampdu, skb);
416 ar9170_tx_fake_ampdu_status(ar);
418 if (atomic_dec_and_test(&ar->tx_ampdu_pending) &&
419 !list_empty(&ar->tx_ampdu_list))
423 void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
425 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
426 struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
427 unsigned int queue = skb_get_queue_mapping(skb);
430 spin_lock_irqsave(&ar->tx_stats_lock, flags);
431 ar->tx_stats[queue].len--;
433 if (skb_queue_empty(&ar->tx_pending[queue])) {
434 #ifdef AR9170_QUEUE_STOP_DEBUG
435 printk(KERN_DEBUG "%s: wake queue %d\n",
436 wiphy_name(ar->hw->wiphy), queue);
437 __ar9170_dump_txstats(ar);
438 #endif /* AR9170_QUEUE_STOP_DEBUG */
439 ieee80211_wake_queue(ar->hw, queue);
441 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
443 if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) {
444 ar9170_tx_ampdu_callback(ar, skb);
445 } else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) {
446 arinfo->timeout = jiffies +
447 msecs_to_jiffies(AR9170_TX_TIMEOUT);
449 skb_queue_tail(&ar->tx_status[queue], skb);
450 } else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) {
451 ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
453 #ifdef AR9170_QUEUE_DEBUG
454 printk(KERN_DEBUG "%s: unsupported frame flags!\n",
455 wiphy_name(ar->hw->wiphy));
456 ar9170_print_txheader(ar, skb);
457 #endif /* AR9170_QUEUE_DEBUG */
458 dev_kfree_skb_any(skb);
461 if (!ar->tx_stats[queue].len &&
462 !skb_queue_empty(&ar->tx_pending[queue])) {
467 static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
469 struct sk_buff_head *queue,
476 * Unfortunately, the firmware does not tell to which (queued) frame
477 * this transmission status report belongs to.
479 * So we have to make risky guesses - with the scarce information
480 * the firmware provided (-> destination MAC, and phy_control) -
481 * and hope that we picked the right one...
484 spin_lock_irqsave(&queue->lock, flags);
485 skb_queue_walk(queue, skb) {
486 struct ar9170_tx_control *txc = (void *) skb->data;
487 struct ieee80211_hdr *hdr = (void *) txc->frame_data;
490 if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
491 #ifdef AR9170_QUEUE_DEBUG
492 printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n",
493 wiphy_name(ar->hw->wiphy), mac,
494 ieee80211_get_DA(hdr));
495 ar9170_print_txheader(ar, skb);
496 #endif /* AR9170_QUEUE_DEBUG */
500 r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
501 AR9170_TX_PHY_MCS_SHIFT;
503 if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
504 #ifdef AR9170_QUEUE_DEBUG
505 printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n",
506 wiphy_name(ar->hw->wiphy), rate, r);
507 ar9170_print_txheader(ar, skb);
508 #endif /* AR9170_QUEUE_DEBUG */
512 __skb_unlink(skb, queue);
513 spin_unlock_irqrestore(&queue->lock, flags);
517 #ifdef AR9170_QUEUE_DEBUG
518 printk(KERN_ERR "%s: ESS:[%pM] does not have any "
519 "outstanding frames in queue.\n",
520 wiphy_name(ar->hw->wiphy), mac);
521 __ar9170_dump_txqueue(ar, queue);
522 #endif /* AR9170_QUEUE_DEBUG */
523 spin_unlock_irqrestore(&queue->lock, flags);
528 static void ar9170_handle_block_ack(struct ar9170 *ar, u16 count, u16 r)
531 struct ieee80211_tx_info *txinfo;
534 skb = ar9170_get_queued_skb(ar, NULL, &ar->tx_status_ampdu, r);
538 txinfo = IEEE80211_SKB_CB(skb);
539 ieee80211_tx_info_clear_status(txinfo);
541 /* FIXME: maybe more ? */
542 txinfo->status.rates[0].count = 1;
544 skb_pull(skb, sizeof(struct ar9170_tx_control));
545 ieee80211_tx_status_irqsafe(ar->hw, skb);
549 #ifdef AR9170_TXAGG_DEBUG
551 printk(KERN_DEBUG "%s: got %d more failed mpdus, but no more "
552 "suitable frames left in tx_status queue.\n",
553 wiphy_name(ar->hw->wiphy), count);
555 ar9170_dump_tx_status_ampdu(ar);
557 #endif /* AR9170_TXAGG_DEBUG */
561 * This worker tries to keeps an maintain tx_status queues.
562 * So we can guarantee that incoming tx_status reports are
563 * actually for a pending frame.
566 static void ar9170_tx_janitor(struct work_struct *work)
568 struct ar9170 *ar = container_of(work, struct ar9170,
570 struct sk_buff_head waste;
572 bool resched = false;
574 if (unlikely(!IS_STARTED(ar)))
577 skb_queue_head_init(&waste);
579 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
580 #ifdef AR9170_QUEUE_DEBUG
581 printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n",
582 wiphy_name(ar->hw->wiphy), i);
583 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
584 ar9170_dump_txqueue(ar, &ar->tx_status[i]);
585 #endif /* AR9170_QUEUE_DEBUG */
587 ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
588 ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
589 skb_queue_purge(&waste);
591 if (!skb_queue_empty(&ar->tx_status[i]) ||
592 !skb_queue_empty(&ar->tx_pending[i]))
596 ar9170_tx_fake_ampdu_status(ar);
601 ieee80211_queue_delayed_work(ar->hw,
603 msecs_to_jiffies(AR9170_JANITOR_DELAY));
606 void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
608 struct ar9170_cmd_response *cmd = (void *) buf;
610 if ((cmd->type & 0xc0) != 0xc0) {
611 ar->callback_cmd(ar, len, buf);
615 /* hardware event handlers */
619 * TX status notification:
620 * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
624 * M1-M6 is the MAC address
625 * R1-R4 is the transmit rate
626 * S1-S2 is the transmit status
630 u32 phy = le32_to_cpu(cmd->tx_status.rate);
631 u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
632 AR9170_TX_PHY_QOS_SHIFT;
633 #ifdef AR9170_QUEUE_DEBUG
634 printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n",
635 wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q);
636 #endif /* AR9170_QUEUE_DEBUG */
638 skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
640 AR9170_TX_INVALID_RATE);
644 ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
652 if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
653 ieee80211_queue_work(ar->hw, &ar->beacon_work);
658 * (IBSS) beacon send notification
659 * bytes: 04 c2 XX YY B4 B3 B2 B1
663 * B1-B4 "should" be the number of send out beacons.
668 /* End of Atim Window */
672 /* BlockACK bitmap */
676 /* BlockACK events */
677 ar9170_handle_block_ack(ar,
678 le16_to_cpu(cmd->ba_fail_cnt.failed),
679 le16_to_cpu(cmd->ba_fail_cnt.rate));
680 ar9170_tx_fake_ampdu_status(ar);
684 /* Watchdog Interrupt */
688 /* retransmission issue / SIFS/EIFS collision ?! */
693 printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4);
700 printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n",
704 printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n",
705 le16_to_cpup((__le16 *)((char *)buf + 4)));
708 printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n",
709 le32_to_cpup((__le32 *)((char *)buf + 4)));
712 printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n",
713 (unsigned long)le64_to_cpup(
714 (__le64 *)((char *)buf + 4)));
719 print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE,
720 (char *)buf + 4, len - 4);
724 printk(KERN_INFO "received unhandled event %x\n", cmd->type);
725 print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
730 static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar)
732 memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head));
733 ar->rx_mpdu.has_plcp = false;
736 int ar9170_nag_limiter(struct ar9170 *ar)
741 * we expect all sorts of errors in promiscuous mode.
742 * don't bother with it, it's OK!
744 if (ar->sniffer_enabled)
748 * only go for frequent errors! The hardware tends to
749 * do some stupid thing once in a while under load, in
750 * noisy environments or just for fun!
752 if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit())
753 print_message = true;
755 print_message = false;
757 /* reset threshold for "once in a while" */
758 ar->bad_hw_nagger = jiffies + HZ / 4;
759 return print_message;
762 static int ar9170_rx_mac_status(struct ar9170 *ar,
763 struct ar9170_rx_head *head,
764 struct ar9170_rx_macstatus *mac,
765 struct ieee80211_rx_status *status)
769 BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
770 BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4);
773 if (error & AR9170_RX_ERROR_MMIC) {
774 status->flag |= RX_FLAG_MMIC_ERROR;
775 error &= ~AR9170_RX_ERROR_MMIC;
778 if (error & AR9170_RX_ERROR_PLCP) {
779 status->flag |= RX_FLAG_FAILED_PLCP_CRC;
780 error &= ~AR9170_RX_ERROR_PLCP;
782 if (!(ar->filter_state & FIF_PLCPFAIL))
786 if (error & AR9170_RX_ERROR_FCS) {
787 status->flag |= RX_FLAG_FAILED_FCS_CRC;
788 error &= ~AR9170_RX_ERROR_FCS;
790 if (!(ar->filter_state & FIF_FCSFAIL))
794 decrypt = ar9170_get_decrypt_type(mac);
795 if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
796 decrypt != AR9170_ENC_ALG_NONE)
797 status->flag |= RX_FLAG_DECRYPTED;
799 /* ignore wrong RA errors */
800 error &= ~AR9170_RX_ERROR_WRONG_RA;
802 if (error & AR9170_RX_ERROR_DECRYPT) {
803 error &= ~AR9170_RX_ERROR_DECRYPT;
805 * Rx decryption is done in place,
806 * the original data is lost anyway.
812 /* drop any other error frames */
813 if (unlikely(error)) {
814 /* TODO: update netdevice's RX dropped/errors statistics */
816 if (ar9170_nag_limiter(ar))
817 printk(KERN_DEBUG "%s: received frame with "
818 "suspicious error code (%#x).\n",
819 wiphy_name(ar->hw->wiphy), error);
824 status->band = ar->channel->band;
825 status->freq = ar->channel->center_freq;
827 switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) {
828 case AR9170_RX_STATUS_MODULATION_CCK:
829 if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
830 status->flag |= RX_FLAG_SHORTPRE;
831 switch (head->plcp[0]) {
833 status->rate_idx = 0;
836 status->rate_idx = 1;
839 status->rate_idx = 2;
842 status->rate_idx = 3;
845 if (ar9170_nag_limiter(ar))
846 printk(KERN_ERR "%s: invalid plcp cck rate "
847 "(%x).\n", wiphy_name(ar->hw->wiphy),
853 case AR9170_RX_STATUS_MODULATION_DUPOFDM:
854 case AR9170_RX_STATUS_MODULATION_OFDM:
855 switch (head->plcp[0] & 0xf) {
857 status->rate_idx = 0;
860 status->rate_idx = 1;
863 status->rate_idx = 2;
866 status->rate_idx = 3;
869 status->rate_idx = 4;
872 status->rate_idx = 5;
875 status->rate_idx = 6;
878 status->rate_idx = 7;
881 if (ar9170_nag_limiter(ar))
882 printk(KERN_ERR "%s: invalid plcp ofdm rate "
883 "(%x).\n", wiphy_name(ar->hw->wiphy),
887 if (status->band == IEEE80211_BAND_2GHZ)
888 status->rate_idx += 4;
891 case AR9170_RX_STATUS_MODULATION_HT:
892 if (head->plcp[3] & 0x80)
893 status->flag |= RX_FLAG_40MHZ;
894 if (head->plcp[6] & 0x80)
895 status->flag |= RX_FLAG_SHORT_GI;
897 status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f);
898 status->flag |= RX_FLAG_HT;
902 if (ar9170_nag_limiter(ar))
903 printk(KERN_ERR "%s: invalid modulation\n",
904 wiphy_name(ar->hw->wiphy));
911 static void ar9170_rx_phy_status(struct ar9170 *ar,
912 struct ar9170_rx_phystatus *phy,
913 struct ieee80211_rx_status *status)
917 BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20);
919 for (i = 0; i < 3; i++)
920 if (phy->rssi[i] != 0x80)
921 status->antenna |= BIT(i);
923 /* post-process RSSI */
924 for (i = 0; i < 7; i++)
925 if (phy->rssi[i] & 0x80)
926 phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f;
928 /* TODO: we could do something with phy_errors */
929 status->signal = ar->noise[0] + phy->rssi_combined;
930 status->noise = ar->noise[0];
933 static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len)
937 struct ieee80211_hdr *hdr = (void *) buf;
939 if (ieee80211_is_data_qos(hdr->frame_control)) {
940 u8 *qc = ieee80211_get_qos_ctl(hdr);
941 reserved += NET_IP_ALIGN;
943 if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
944 reserved += NET_IP_ALIGN;
947 if (ieee80211_has_a4(hdr->frame_control))
948 reserved += NET_IP_ALIGN;
950 reserved = 32 + (reserved & NET_IP_ALIGN);
952 skb = dev_alloc_skb(len + reserved);
954 skb_reserve(skb, reserved);
955 memcpy(skb_put(skb, len), buf, len);
962 * If the frame alignment is right (or the kernel has
963 * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
964 * is only a single MPDU in the USB frame, then we could
965 * submit to mac80211 the SKB directly. However, since
966 * there may be multiple packets in one SKB in stream
967 * mode, and we need to observe the proper ordering,
968 * this is non-trivial.
971 static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
973 struct ar9170_rx_head *head;
974 struct ar9170_rx_macstatus *mac;
975 struct ar9170_rx_phystatus *phy = NULL;
976 struct ieee80211_rx_status status;
980 if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac))))
984 mpdu_len = len - sizeof(*mac);
986 mac = (void *)(buf + mpdu_len);
987 if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) {
988 /* this frame is too damaged and can't be used - drop it */
993 switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) {
994 case AR9170_RX_STATUS_MPDU_FIRST:
995 /* first mpdu packet has the plcp header */
996 if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) {
998 memcpy(&ar->rx_mpdu.plcp, (void *) buf,
999 sizeof(struct ar9170_rx_head));
1001 mpdu_len -= sizeof(struct ar9170_rx_head);
1002 buf += sizeof(struct ar9170_rx_head);
1003 ar->rx_mpdu.has_plcp = true;
1005 if (ar9170_nag_limiter(ar))
1006 printk(KERN_ERR "%s: plcp info is clipped.\n",
1007 wiphy_name(ar->hw->wiphy));
1012 case AR9170_RX_STATUS_MPDU_LAST:
1013 /* last mpdu has a extra tail with phy status information */
1015 if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) {
1016 mpdu_len -= sizeof(struct ar9170_rx_phystatus);
1017 phy = (void *)(buf + mpdu_len);
1019 if (ar9170_nag_limiter(ar))
1020 printk(KERN_ERR "%s: frame tail is clipped.\n",
1021 wiphy_name(ar->hw->wiphy));
1025 case AR9170_RX_STATUS_MPDU_MIDDLE:
1026 /* middle mpdus are just data */
1027 if (unlikely(!ar->rx_mpdu.has_plcp)) {
1028 if (!ar9170_nag_limiter(ar))
1031 printk(KERN_ERR "%s: rx stream did not start "
1032 "with a first_mpdu frame tag.\n",
1033 wiphy_name(ar->hw->wiphy));
1038 head = &ar->rx_mpdu.plcp;
1041 case AR9170_RX_STATUS_MPDU_SINGLE:
1042 /* single mpdu - has plcp (head) and phy status (tail) */
1043 head = (void *) buf;
1045 mpdu_len -= sizeof(struct ar9170_rx_head);
1046 mpdu_len -= sizeof(struct ar9170_rx_phystatus);
1048 buf += sizeof(struct ar9170_rx_head);
1049 phy = (void *)(buf + mpdu_len);
1057 if (unlikely(mpdu_len < FCS_LEN))
1060 memset(&status, 0, sizeof(status));
1061 if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status)))
1065 ar9170_rx_phy_status(ar, phy, &status);
1067 skb = ar9170_rx_copy_data(buf, mpdu_len);
1069 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1070 ieee80211_rx_irqsafe(ar->hw, skb);
1074 void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
1076 unsigned int i, tlen, resplen, wlen = 0, clen = 0;
1083 clen = tbuf[1] << 8 | tbuf[0];
1084 wlen = ALIGN(clen, 4);
1086 /* check if this is stream has a valid tag.*/
1087 if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
1089 * TODO: handle the highly unlikely event that the
1090 * corrupted stream has the TAG at the right position.
1093 /* check if the frame can be repaired. */
1094 if (!ar->rx_failover_missing) {
1095 /* this is no "short read". */
1096 if (ar9170_nag_limiter(ar)) {
1097 printk(KERN_ERR "%s: missing tag!\n",
1098 wiphy_name(ar->hw->wiphy));
1104 if (ar->rx_failover_missing > tlen) {
1105 if (ar9170_nag_limiter(ar)) {
1106 printk(KERN_ERR "%s: possible multi "
1107 "stream corruption!\n",
1108 wiphy_name(ar->hw->wiphy));
1114 memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
1115 ar->rx_failover_missing -= tlen;
1117 if (ar->rx_failover_missing <= 0) {
1119 * nested ar9170_rx call!
1120 * termination is guranteed, even when the
1121 * combined frame also have a element with
1125 ar->rx_failover_missing = 0;
1126 ar9170_rx(ar, ar->rx_failover);
1128 skb_reset_tail_pointer(ar->rx_failover);
1129 skb_trim(ar->rx_failover, 0);
1135 /* check if stream is clipped */
1136 if (wlen > tlen - 4) {
1137 if (ar->rx_failover_missing) {
1138 /* TODO: handle double stream corruption. */
1139 if (ar9170_nag_limiter(ar)) {
1140 printk(KERN_ERR "%s: double rx stream "
1142 wiphy_name(ar->hw->wiphy));
1149 * save incomplete data set.
1150 * the firmware will resend the missing bits when
1151 * the rx - descriptor comes round again.
1154 memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
1155 ar->rx_failover_missing = clen - tlen;
1165 /* weird thing, but this is the same in the original driver */
1166 while (resplen > 2 && i < 12 &&
1167 respbuf[0] == 0xff && respbuf[1] == 0xff) {
1176 /* found the 6 * 0xffff marker? */
1178 ar9170_handle_command_response(ar, respbuf, resplen);
1180 ar9170_handle_mpdu(ar, respbuf, clen);
1184 if (net_ratelimit())
1185 printk(KERN_ERR "%s: %d bytes of unprocessed "
1186 "data left in rx stream!\n",
1187 wiphy_name(ar->hw->wiphy), tlen);
1195 printk(KERN_ERR "%s: damaged RX stream data [want:%d, "
1196 "data:%d, rx:%d, pending:%d ]\n",
1197 wiphy_name(ar->hw->wiphy), clen, wlen, tlen,
1198 ar->rx_failover_missing);
1200 if (ar->rx_failover_missing)
1201 print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET,
1202 ar->rx_failover->data,
1203 ar->rx_failover->len);
1205 print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET,
1206 skb->data, skb->len);
1208 printk(KERN_ERR "%s: please check your hardware and cables, if "
1209 "you see this message frequently.\n",
1210 wiphy_name(ar->hw->wiphy));
1213 if (ar->rx_failover_missing) {
1214 skb_reset_tail_pointer(ar->rx_failover);
1215 skb_trim(ar->rx_failover, 0);
1216 ar->rx_failover_missing = 0;
1220 #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
1222 queue.aifs = ai_fs; \
1223 queue.cw_min = cwmin; \
1224 queue.cw_max = cwmax; \
1225 queue.txop = _txop; \
1228 static int ar9170_op_start(struct ieee80211_hw *hw)
1230 struct ar9170 *ar = hw->priv;
1233 mutex_lock(&ar->mutex);
1235 /* reinitialize queues statistics */
1236 memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
1237 for (i = 0; i < __AR9170_NUM_TXQ; i++)
1238 ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
1240 /* reset QoS defaults */
1241 AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
1242 AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */
1243 AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */
1244 AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */
1245 AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
1247 /* set sane AMPDU defaults */
1248 ar->global_ampdu_density = 6;
1249 ar->global_ampdu_factor = 3;
1251 atomic_set(&ar->tx_ampdu_pending, 0);
1252 ar->bad_hw_nagger = jiffies;
1258 err = ar9170_init_mac(ar);
1262 err = ar9170_set_qos(ar);
1266 err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
1270 err = ar9170_init_rf(ar);
1275 err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
1279 ar->state = AR9170_STARTED;
1282 mutex_unlock(&ar->mutex);
1286 static void ar9170_op_stop(struct ieee80211_hw *hw)
1288 struct ar9170 *ar = hw->priv;
1292 ar->state = AR9170_IDLE;
1294 cancel_delayed_work_sync(&ar->tx_janitor);
1295 #ifdef CONFIG_AR9170_LEDS
1296 cancel_delayed_work_sync(&ar->led_work);
1298 cancel_work_sync(&ar->beacon_work);
1300 mutex_lock(&ar->mutex);
1302 if (IS_ACCEPTING_CMD(ar)) {
1303 ar9170_set_leds_state(ar, 0);
1306 ar9170_write_reg(ar, 0x1c3d30, 0);
1310 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1311 skb_queue_purge(&ar->tx_pending[i]);
1312 skb_queue_purge(&ar->tx_status[i]);
1314 skb_queue_purge(&ar->tx_status_ampdu);
1316 mutex_unlock(&ar->mutex);
1319 static void ar9170_tx_indicate_immba(struct ar9170 *ar, struct sk_buff *skb)
1321 struct ar9170_tx_control *txc = (void *) skb->data;
1323 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_IMM_AMPDU);
1326 static void ar9170_tx_copy_phy(struct ar9170 *ar, struct sk_buff *dst,
1327 struct sk_buff *src)
1329 struct ar9170_tx_control *dst_txc, *src_txc;
1330 struct ieee80211_tx_info *dst_info, *src_info;
1331 struct ar9170_tx_info *dst_arinfo, *src_arinfo;
1333 src_txc = (void *) src->data;
1334 src_info = IEEE80211_SKB_CB(src);
1335 src_arinfo = (void *) src_info->rate_driver_data;
1337 dst_txc = (void *) dst->data;
1338 dst_info = IEEE80211_SKB_CB(dst);
1339 dst_arinfo = (void *) dst_info->rate_driver_data;
1341 dst_txc->phy_control = src_txc->phy_control;
1343 /* same MCS for the whole aggregate */
1344 memcpy(dst_info->driver_rates, src_info->driver_rates,
1345 sizeof(dst_info->driver_rates));
1348 static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
1350 struct ieee80211_hdr *hdr;
1351 struct ar9170_tx_control *txc;
1352 struct ieee80211_tx_info *info;
1353 struct ieee80211_tx_rate *txrate;
1354 struct ar9170_tx_info *arinfo;
1355 unsigned int queue = skb_get_queue_mapping(skb);
1359 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1361 hdr = (void *)skb->data;
1362 info = IEEE80211_SKB_CB(skb);
1365 txc = (void *)skb_push(skb, sizeof(*txc));
1367 if (info->control.hw_key) {
1368 icv = info->control.hw_key->icv_len;
1370 switch (info->control.hw_key->alg) {
1372 keytype = AR9170_TX_MAC_ENCR_RC4;
1375 keytype = AR9170_TX_MAC_ENCR_RC4;
1378 keytype = AR9170_TX_MAC_ENCR_AES;
1387 txc->length = cpu_to_le16(len + icv + 4);
1389 txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
1390 AR9170_TX_MAC_BACKOFF);
1391 txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
1392 AR9170_TX_MAC_QOS_SHIFT);
1393 txc->mac_control |= cpu_to_le16(keytype);
1394 txc->phy_control = cpu_to_le32(0);
1396 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1397 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
1399 txrate = &info->control.rates[0];
1400 if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1401 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
1402 else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1403 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
1405 arinfo = (void *)info->rate_driver_data;
1406 arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
1408 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
1409 (is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
1410 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1411 if (unlikely(!info->control.sta))
1414 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
1415 arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK;
1420 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
1423 * Putting the QoS queue bits into an unexplored territory is
1424 * certainly not elegant.
1426 * In my defense: This idea provides a reasonable way to
1427 * smuggle valuable information to the tx_status callback.
1428 * Also, the idea behind this bit-abuse came straight from
1429 * the original driver code.
1433 cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
1434 arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK;
1436 arinfo->flags = AR9170_TX_FLAG_NO_ACK;
1443 skb_pull(skb, sizeof(*txc));
1447 static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
1449 struct ar9170_tx_control *txc;
1450 struct ieee80211_tx_info *info;
1451 struct ieee80211_rate *rate = NULL;
1452 struct ieee80211_tx_rate *txrate;
1455 txc = (void *) skb->data;
1456 info = IEEE80211_SKB_CB(skb);
1457 txrate = &info->control.rates[0];
1459 if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1460 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
1462 if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1463 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
1465 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1466 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
1467 /* this works because 40 MHz is 2 and dup is 3 */
1468 if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
1469 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
1471 if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
1472 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
1474 if (txrate->flags & IEEE80211_TX_RC_MCS) {
1475 u32 r = txrate->idx;
1478 /* heavy clip control */
1479 txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
1481 r <<= AR9170_TX_PHY_MCS_SHIFT;
1482 BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
1484 txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
1485 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
1487 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
1488 if (info->band == IEEE80211_BAND_5GHZ)
1489 txpower = ar->power_5G_ht40;
1491 txpower = ar->power_2G_ht40;
1493 if (info->band == IEEE80211_BAND_5GHZ)
1494 txpower = ar->power_5G_ht20;
1496 txpower = ar->power_2G_ht20;
1499 power = txpower[(txrate->idx) & 7];
1504 u8 idx = txrate->idx;
1506 if (info->band != IEEE80211_BAND_2GHZ) {
1508 txpower = ar->power_5G_leg;
1509 mod = AR9170_TX_PHY_MOD_OFDM;
1512 txpower = ar->power_2G_cck;
1513 mod = AR9170_TX_PHY_MOD_CCK;
1515 mod = AR9170_TX_PHY_MOD_OFDM;
1516 txpower = ar->power_2G_ofdm;
1520 rate = &__ar9170_ratetable[idx];
1522 phyrate = rate->hw_value & 0xF;
1523 power = txpower[(rate->hw_value & 0x30) >> 4];
1524 phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
1526 txc->phy_control |= cpu_to_le32(mod);
1527 txc->phy_control |= cpu_to_le32(phyrate);
1530 power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
1531 power &= AR9170_TX_PHY_TX_PWR_MASK;
1532 txc->phy_control |= cpu_to_le32(power);
1535 if (ar->eeprom.tx_mask == 1) {
1536 chains = AR9170_TX_PHY_TXCHAIN_1;
1538 chains = AR9170_TX_PHY_TXCHAIN_2;
1540 /* >= 36M legacy OFDM - use only one chain */
1541 if (rate && rate->bitrate >= 360)
1542 chains = AR9170_TX_PHY_TXCHAIN_1;
1544 txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
1547 static bool ar9170_tx_ampdu(struct ar9170 *ar)
1549 struct sk_buff_head agg;
1550 struct ar9170_sta_tid *tid_info = NULL, *tmp;
1551 struct sk_buff *skb, *first = NULL;
1552 unsigned long flags, f2;
1554 u16 seq, queue, tmpssn;
1557 skb_queue_head_init(&agg);
1559 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1560 if (list_empty(&ar->tx_ampdu_list)) {
1561 #ifdef AR9170_TXAGG_DEBUG
1562 printk(KERN_DEBUG "%s: aggregation list is empty.\n",
1563 wiphy_name(ar->hw->wiphy));
1564 #endif /* AR9170_TXAGG_DEBUG */
1568 list_for_each_entry_safe(tid_info, tmp, &ar->tx_ampdu_list, list) {
1569 if (tid_info->state != AR9170_TID_STATE_COMPLETE) {
1570 #ifdef AR9170_TXAGG_DEBUG
1571 printk(KERN_DEBUG "%s: dangling aggregation entry!\n",
1572 wiphy_name(ar->hw->wiphy));
1573 #endif /* AR9170_TXAGG_DEBUG */
1578 #ifdef AR9170_TXAGG_DEBUG
1579 printk(KERN_DEBUG "%s: enough frames aggregated.\n",
1580 wiphy_name(ar->hw->wiphy));
1581 #endif /* AR9170_TXAGG_DEBUG */
1585 queue = TID_TO_WME_AC(tid_info->tid);
1587 if (skb_queue_len(&ar->tx_pending[queue]) >=
1588 AR9170_NUM_TX_AGG_MAX) {
1589 #ifdef AR9170_TXAGG_DEBUG
1590 printk(KERN_DEBUG "%s: queue %d full.\n",
1591 wiphy_name(ar->hw->wiphy), queue);
1592 #endif /* AR9170_TXAGG_DEBUG */
1596 list_del_init(&tid_info->list);
1598 spin_lock_irqsave(&tid_info->queue.lock, f2);
1599 tmpssn = seq = tid_info->ssn;
1600 first = skb_peek(&tid_info->queue);
1603 tmpssn = ar9170_get_seq(first);
1605 if (unlikely(tmpssn != seq)) {
1606 #ifdef AR9170_TXAGG_DEBUG
1607 printk(KERN_DEBUG "%s: ssn mismatch [%d != %d]\n.",
1608 wiphy_name(ar->hw->wiphy), seq, tmpssn);
1609 #endif /* AR9170_TXAGG_DEBUG */
1610 tid_info->ssn = tmpssn;
1613 #ifdef AR9170_TXAGG_DEBUG
1614 printk(KERN_DEBUG "%s: generate A-MPDU for tid:%d ssn:%d with "
1615 "%d queued frames.\n", wiphy_name(ar->hw->wiphy),
1616 tid_info->tid, tid_info->ssn,
1617 skb_queue_len(&tid_info->queue));
1618 __ar9170_dump_txqueue(ar, &tid_info->queue);
1619 #endif /* AR9170_TXAGG_DEBUG */
1621 while ((skb = skb_peek(&tid_info->queue))) {
1622 if (unlikely(ar9170_get_seq(skb) != seq))
1625 __skb_unlink(skb, &tid_info->queue);
1626 tid_info->ssn = seq = GET_NEXT_SEQ(seq);
1628 if (unlikely(skb_get_queue_mapping(skb) != queue)) {
1629 #ifdef AR9170_TXAGG_DEBUG
1630 printk(KERN_DEBUG "%s: tid:%d(q:%d) queue:%d "
1631 "!match.\n", wiphy_name(ar->hw->wiphy),
1633 TID_TO_WME_AC(tid_info->tid),
1634 skb_get_queue_mapping(skb));
1635 #endif /* AR9170_TXAGG_DEBUG */
1636 dev_kfree_skb_any(skb);
1640 if (unlikely(first == skb)) {
1641 ar9170_tx_prepare_phy(ar, skb);
1642 __skb_queue_tail(&agg, skb);
1645 ar9170_tx_copy_phy(ar, skb, first);
1646 __skb_queue_tail(&agg, skb);
1649 if (unlikely(skb_queue_len(&agg) ==
1650 AR9170_NUM_TX_AGG_MAX))
1654 if (skb_queue_empty(&tid_info->queue))
1655 tid_info->active = false;
1657 list_add_tail(&tid_info->list,
1658 &ar->tx_ampdu_list);
1660 spin_unlock_irqrestore(&tid_info->queue.lock, f2);
1662 if (unlikely(skb_queue_empty(&agg))) {
1663 #ifdef AR9170_TXAGG_DEBUG
1664 printk(KERN_DEBUG "%s: queued empty list!\n",
1665 wiphy_name(ar->hw->wiphy));
1666 #endif /* AR9170_TXAGG_DEBUG */
1671 * tell the FW/HW that this is the last frame,
1672 * that way it will wait for the immediate block ack.
1674 if (likely(skb_peek_tail(&agg)))
1675 ar9170_tx_indicate_immba(ar, skb_peek_tail(&agg));
1677 #ifdef AR9170_TXAGG_DEBUG
1678 printk(KERN_DEBUG "%s: generated A-MPDU looks like this:\n",
1679 wiphy_name(ar->hw->wiphy));
1680 __ar9170_dump_txqueue(ar, &agg);
1681 #endif /* AR9170_TXAGG_DEBUG */
1683 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1685 spin_lock_irqsave(&ar->tx_pending[queue].lock, flags);
1686 skb_queue_splice_tail_init(&agg, &ar->tx_pending[queue]);
1687 spin_unlock_irqrestore(&ar->tx_pending[queue].lock, flags);
1690 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1694 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1695 __skb_queue_purge(&agg);
1700 static void ar9170_tx(struct ar9170 *ar)
1702 struct sk_buff *skb;
1703 unsigned long flags;
1704 struct ieee80211_tx_info *info;
1705 struct ar9170_tx_info *arinfo;
1706 unsigned int i, frames, frames_failed, remaining_space;
1708 bool schedule_garbagecollector = false;
1710 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1712 if (unlikely(!IS_STARTED(ar)))
1715 remaining_space = AR9170_TX_MAX_PENDING;
1717 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1718 spin_lock_irqsave(&ar->tx_stats_lock, flags);
1719 if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
1720 #ifdef AR9170_QUEUE_DEBUG
1721 printk(KERN_DEBUG "%s: queue %d full\n",
1722 wiphy_name(ar->hw->wiphy), i);
1724 printk(KERN_DEBUG "%s: stuck frames: ===> \n",
1725 wiphy_name(ar->hw->wiphy));
1726 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1727 ar9170_dump_txqueue(ar, &ar->tx_status[i]);
1728 #endif /* AR9170_QUEUE_DEBUG */
1730 #ifdef AR9170_QUEUE_STOP_DEBUG
1731 printk(KERN_DEBUG "%s: stop queue %d\n",
1732 wiphy_name(ar->hw->wiphy), i);
1733 __ar9170_dump_txstats(ar);
1734 #endif /* AR9170_QUEUE_STOP_DEBUG */
1735 ieee80211_stop_queue(ar->hw, i);
1736 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1740 frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
1741 skb_queue_len(&ar->tx_pending[i]));
1743 if (remaining_space < frames) {
1744 #ifdef AR9170_QUEUE_DEBUG
1745 printk(KERN_DEBUG "%s: tx quota reached queue:%d, "
1746 "remaining slots:%d, needed:%d\n",
1747 wiphy_name(ar->hw->wiphy), i, remaining_space,
1749 #endif /* AR9170_QUEUE_DEBUG */
1750 frames = remaining_space;
1753 ar->tx_stats[i].len += frames;
1754 ar->tx_stats[i].count += frames;
1755 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1762 skb = skb_dequeue(&ar->tx_pending[i]);
1763 if (unlikely(!skb)) {
1764 frames_failed += frames;
1769 info = IEEE80211_SKB_CB(skb);
1770 arinfo = (void *) info->rate_driver_data;
1772 /* TODO: cancel stuck frames */
1773 arinfo->timeout = jiffies +
1774 msecs_to_jiffies(AR9170_TX_TIMEOUT);
1776 if (arinfo->flags == AR9170_TX_FLAG_BLOCK_ACK)
1777 atomic_inc(&ar->tx_ampdu_pending);
1779 #ifdef AR9170_QUEUE_DEBUG
1780 printk(KERN_DEBUG "%s: send frame q:%d =>\n",
1781 wiphy_name(ar->hw->wiphy), i);
1782 ar9170_print_txheader(ar, skb);
1783 #endif /* AR9170_QUEUE_DEBUG */
1785 err = ar->tx(ar, skb);
1786 if (unlikely(err)) {
1787 if (arinfo->flags == AR9170_TX_FLAG_BLOCK_ACK)
1788 atomic_dec(&ar->tx_ampdu_pending);
1791 dev_kfree_skb_any(skb);
1794 schedule_garbagecollector = true;
1800 #ifdef AR9170_QUEUE_DEBUG
1801 printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n",
1802 wiphy_name(ar->hw->wiphy), i);
1804 printk(KERN_DEBUG "%s: unprocessed pending frames left:\n",
1805 wiphy_name(ar->hw->wiphy));
1806 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1807 #endif /* AR9170_QUEUE_DEBUG */
1809 if (unlikely(frames_failed)) {
1810 #ifdef AR9170_QUEUE_DEBUG
1811 printk(KERN_DEBUG "%s: frames failed %d =>\n",
1812 wiphy_name(ar->hw->wiphy), frames_failed);
1813 #endif /* AR9170_QUEUE_DEBUG */
1815 spin_lock_irqsave(&ar->tx_stats_lock, flags);
1816 ar->tx_stats[i].len -= frames_failed;
1817 ar->tx_stats[i].count -= frames_failed;
1818 #ifdef AR9170_QUEUE_STOP_DEBUG
1819 printk(KERN_DEBUG "%s: wake queue %d\n",
1820 wiphy_name(ar->hw->wiphy), i);
1821 __ar9170_dump_txstats(ar);
1822 #endif /* AR9170_QUEUE_STOP_DEBUG */
1823 ieee80211_wake_queue(ar->hw, i);
1824 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1828 if (!schedule_garbagecollector)
1831 ieee80211_queue_delayed_work(ar->hw,
1833 msecs_to_jiffies(AR9170_JANITOR_DELAY));
1836 static bool ar9170_tx_ampdu_queue(struct ar9170 *ar, struct sk_buff *skb)
1838 struct ieee80211_tx_info *txinfo;
1839 struct ar9170_sta_info *sta_info;
1840 struct ar9170_sta_tid *agg;
1841 struct sk_buff *iter;
1842 unsigned long flags, f2;
1845 bool run = false, queue = false;
1847 tid = ar9170_get_tid(skb);
1848 seq = ar9170_get_seq(skb);
1849 txinfo = IEEE80211_SKB_CB(skb);
1850 sta_info = (void *) txinfo->control.sta->drv_priv;
1851 agg = &sta_info->agg[tid];
1852 max = sta_info->ampdu_max_len;
1854 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1856 if (unlikely(agg->state != AR9170_TID_STATE_COMPLETE)) {
1857 #ifdef AR9170_TXAGG_DEBUG
1858 printk(KERN_DEBUG "%s: BlockACK session not fully initialized "
1859 "for ESS:%pM tid:%d state:%d.\n",
1860 wiphy_name(ar->hw->wiphy), agg->addr, agg->tid,
1862 #endif /* AR9170_TXAGG_DEBUG */
1872 /* check if seq is within the BA window */
1873 if (unlikely(!BAW_WITHIN(agg->ssn, max, seq))) {
1874 #ifdef AR9170_TXAGG_DEBUG
1875 printk(KERN_DEBUG "%s: frame with tid:%d seq:%d does not "
1876 "fit into BA window (%d - %d)\n",
1877 wiphy_name(ar->hw->wiphy), tid, seq, agg->ssn,
1878 (agg->ssn + max) & 0xfff);
1879 #endif /* AR9170_TXAGG_DEBUG */
1883 spin_lock_irqsave(&agg->queue.lock, f2);
1885 skb_queue_reverse_walk(&agg->queue, iter) {
1886 qseq = ar9170_get_seq(iter);
1888 if (GET_NEXT_SEQ(qseq) == seq) {
1889 __skb_queue_after(&agg->queue, iter, skb);
1894 __skb_queue_head(&agg->queue, skb);
1897 spin_unlock_irqrestore(&agg->queue.lock, f2);
1899 #ifdef AR9170_TXAGG_DEBUG
1900 printk(KERN_DEBUG "%s: new aggregate %p queued.\n",
1901 wiphy_name(ar->hw->wiphy), skb);
1902 __ar9170_dump_txqueue(ar, &agg->queue);
1903 #endif /* AR9170_TXAGG_DEBUG */
1905 if (skb_queue_len(&agg->queue) >= AR9170_NUM_TX_AGG_MAX)
1909 list_add_tail(&agg->list, &ar->tx_ampdu_list);
1911 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1915 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1916 dev_kfree_skb_irq(skb);
1920 int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1922 struct ar9170 *ar = hw->priv;
1923 struct ieee80211_tx_info *info;
1925 if (unlikely(!IS_STARTED(ar)))
1928 if (unlikely(ar9170_tx_prepare(ar, skb)))
1931 info = IEEE80211_SKB_CB(skb);
1932 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1933 bool run = ar9170_tx_ampdu_queue(ar, skb);
1935 if (run || !atomic_read(&ar->tx_ampdu_pending))
1936 ar9170_tx_ampdu(ar);
1938 unsigned int queue = skb_get_queue_mapping(skb);
1940 ar9170_tx_prepare_phy(ar, skb);
1941 skb_queue_tail(&ar->tx_pending[queue], skb);
1945 return NETDEV_TX_OK;
1948 dev_kfree_skb_any(skb);
1949 return NETDEV_TX_OK;
1952 static int ar9170_op_add_interface(struct ieee80211_hw *hw,
1953 struct ieee80211_if_init_conf *conf)
1955 struct ar9170 *ar = hw->priv;
1956 struct ath_common *common = &ar->common;
1959 mutex_lock(&ar->mutex);
1966 ar->vif = conf->vif;
1967 memcpy(common->macaddr, conf->mac_addr, ETH_ALEN);
1969 if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
1970 ar->rx_software_decryption = true;
1971 ar->disable_offload = true;
1975 err = ar9170_update_frame_filter(ar, AR9170_MAC_REG_FTF_DEFAULTS);
1979 err = ar9170_set_operating_mode(ar);
1982 mutex_unlock(&ar->mutex);
1986 static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
1987 struct ieee80211_if_init_conf *conf)
1989 struct ar9170 *ar = hw->priv;
1991 mutex_lock(&ar->mutex);
1993 ar9170_update_frame_filter(ar, 0);
1994 ar9170_set_beacon_timers(ar);
1995 dev_kfree_skb(ar->beacon);
1997 ar->sniffer_enabled = false;
1998 ar->rx_software_decryption = false;
1999 ar9170_set_operating_mode(ar);
2000 mutex_unlock(&ar->mutex);
2003 static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
2005 struct ar9170 *ar = hw->priv;
2008 mutex_lock(&ar->mutex);
2010 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
2015 if (changed & IEEE80211_CONF_CHANGE_PS) {
2020 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2025 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
2027 * is it long_frame_max_tx_count or short_frame_max_tx_count?
2030 err = ar9170_set_hwretry_limit(ar,
2031 ar->hw->conf.long_frame_max_tx_count);
2036 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2038 /* adjust slot time for 5 GHz */
2039 err = ar9170_set_slot_time(ar);
2043 err = ar9170_set_dyn_sifs_ack(ar);
2047 err = ar9170_set_channel(ar, hw->conf.channel,
2049 nl80211_to_ar9170(hw->conf.channel_type));
2055 mutex_unlock(&ar->mutex);
2059 static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count,
2060 struct dev_addr_list *mclist)
2065 /* always get broadcast frames */
2066 mchash = 1ULL << (0xff >> 2);
2068 for (i = 0; i < mc_count; i++) {
2069 if (WARN_ON(!mclist))
2071 mchash |= 1ULL << (mclist->dmi_addr[5] >> 2);
2072 mclist = mclist->next;
2078 static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
2079 unsigned int changed_flags,
2080 unsigned int *new_flags,
2083 struct ar9170 *ar = hw->priv;
2085 if (unlikely(!IS_ACCEPTING_CMD(ar)))
2088 mutex_lock(&ar->mutex);
2090 /* mask supported flags */
2091 *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
2092 FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL;
2093 ar->filter_state = *new_flags;
2095 * We can support more by setting the sniffer bit and
2096 * then checking the error flags, later.
2099 if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI)
2102 if (multicast != ar->cur_mc_hash)
2103 ar9170_update_multicast(ar, multicast);
2105 if (changed_flags & FIF_CONTROL) {
2106 u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
2107 AR9170_MAC_REG_FTF_RTS |
2108 AR9170_MAC_REG_FTF_CTS |
2109 AR9170_MAC_REG_FTF_ACK |
2110 AR9170_MAC_REG_FTF_CFE |
2111 AR9170_MAC_REG_FTF_CFE_ACK;
2113 if (*new_flags & FIF_CONTROL)
2114 filter |= ar->cur_filter;
2116 filter &= (~ar->cur_filter);
2118 ar9170_update_frame_filter(ar, filter);
2121 if (changed_flags & FIF_PROMISC_IN_BSS) {
2122 ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
2123 ar9170_set_operating_mode(ar);
2126 mutex_unlock(&ar->mutex);
2130 static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
2131 struct ieee80211_vif *vif,
2132 struct ieee80211_bss_conf *bss_conf,
2135 struct ar9170 *ar = hw->priv;
2136 struct ath_common *common = &ar->common;
2139 mutex_lock(&ar->mutex);
2141 if (changed & BSS_CHANGED_BSSID) {
2142 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2143 err = ar9170_set_operating_mode(ar);
2148 if (changed & BSS_CHANGED_BEACON_ENABLED)
2149 ar->enable_beacon = bss_conf->enable_beacon;
2151 if (changed & BSS_CHANGED_BEACON) {
2152 err = ar9170_update_beacon(ar);
2157 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
2158 BSS_CHANGED_BEACON_INT)) {
2159 err = ar9170_set_beacon_timers(ar);
2164 if (changed & BSS_CHANGED_ASSOC) {
2165 #ifndef CONFIG_AR9170_LEDS
2166 /* enable assoc LED. */
2167 err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
2168 #endif /* CONFIG_AR9170_LEDS */
2171 if (changed & BSS_CHANGED_HT) {
2176 if (changed & BSS_CHANGED_ERP_SLOT) {
2177 err = ar9170_set_slot_time(ar);
2182 if (changed & BSS_CHANGED_BASIC_RATES) {
2183 err = ar9170_set_basic_rates(ar);
2189 mutex_unlock(&ar->mutex);
2192 static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
2194 struct ar9170 *ar = hw->priv;
2198 static const u32 addr[NR] = { AR9170_MAC_REG_TSF_H,
2199 AR9170_MAC_REG_TSF_L,
2200 AR9170_MAC_REG_TSF_H };
2204 mutex_lock(&ar->mutex);
2206 while (loops++ < 10) {
2207 err = ar9170_read_mreg(ar, NR, addr, val);
2208 if (err || val[0] == val[2])
2212 mutex_unlock(&ar->mutex);
2217 tsf = (tsf << 32) | val[1];
2222 static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2223 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2224 struct ieee80211_key_conf *key)
2226 struct ar9170 *ar = hw->priv;
2230 if ((!ar->vif) || (ar->disable_offload))
2235 if (key->keylen == WLAN_KEY_LEN_WEP40)
2236 ktype = AR9170_ENC_ALG_WEP64;
2238 ktype = AR9170_ENC_ALG_WEP128;
2241 ktype = AR9170_ENC_ALG_TKIP;
2244 ktype = AR9170_ENC_ALG_AESCCMP;
2250 mutex_lock(&ar->mutex);
2251 if (cmd == SET_KEY) {
2252 if (unlikely(!IS_STARTED(ar))) {
2257 /* group keys need all-zeroes address */
2258 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2261 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
2262 for (i = 0; i < 64; i++)
2263 if (!(ar->usedkeys & BIT(i)))
2266 ar->rx_software_decryption = true;
2267 ar9170_set_operating_mode(ar);
2272 i = 64 + key->keyidx;
2275 key->hw_key_idx = i;
2277 err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
2278 key->key, min_t(u8, 16, key->keylen));
2282 if (key->alg == ALG_TKIP) {
2283 err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
2284 ktype, 1, key->key + 16, 16);
2289 * hardware is not capable generating the MMIC
2290 * for fragmented frames!
2292 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2296 ar->usedkeys |= BIT(i);
2298 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2300 if (unlikely(!IS_STARTED(ar))) {
2301 /* The device is gone... together with the key ;-) */
2306 err = ar9170_disable_key(ar, key->hw_key_idx);
2310 if (key->hw_key_idx < 64) {
2311 ar->usedkeys &= ~BIT(key->hw_key_idx);
2313 err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
2314 AR9170_ENC_ALG_NONE, 0,
2319 if (key->alg == ALG_TKIP) {
2320 err = ar9170_upload_key(ar, key->hw_key_idx,
2322 AR9170_ENC_ALG_NONE, 1,
2331 ar9170_regwrite_begin(ar);
2332 ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
2333 ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
2334 ar9170_regwrite_finish();
2335 err = ar9170_regwrite_result();
2338 mutex_unlock(&ar->mutex);
2343 static void ar9170_sta_notify(struct ieee80211_hw *hw,
2344 struct ieee80211_vif *vif,
2345 enum sta_notify_cmd cmd,
2346 struct ieee80211_sta *sta)
2348 struct ar9170 *ar = hw->priv;
2349 struct ar9170_sta_info *sta_info = (void *) sta->drv_priv;
2353 case STA_NOTIFY_ADD:
2354 memset(sta_info, 0, sizeof(*sta_info));
2356 if (!sta->ht_cap.ht_supported)
2359 if (sta->ht_cap.ampdu_density > ar->global_ampdu_density)
2360 ar->global_ampdu_density = sta->ht_cap.ampdu_density;
2362 if (sta->ht_cap.ampdu_factor < ar->global_ampdu_factor)
2363 ar->global_ampdu_factor = sta->ht_cap.ampdu_factor;
2365 for (i = 0; i < AR9170_NUM_TID; i++) {
2366 sta_info->agg[i].state = AR9170_TID_STATE_SHUTDOWN;
2367 sta_info->agg[i].active = false;
2368 sta_info->agg[i].ssn = 0;
2369 sta_info->agg[i].retry = 0;
2370 sta_info->agg[i].tid = i;
2371 INIT_LIST_HEAD(&sta_info->agg[i].list);
2372 skb_queue_head_init(&sta_info->agg[i].queue);
2375 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
2378 case STA_NOTIFY_REMOVE:
2379 if (!sta->ht_cap.ht_supported)
2382 for (i = 0; i < AR9170_NUM_TID; i++) {
2383 sta_info->agg[i].state = AR9170_TID_STATE_INVALID;
2384 skb_queue_purge(&sta_info->agg[i].queue);
2394 static int ar9170_get_stats(struct ieee80211_hw *hw,
2395 struct ieee80211_low_level_stats *stats)
2397 struct ar9170 *ar = hw->priv;
2401 mutex_lock(&ar->mutex);
2402 err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
2403 ar->stats.dot11ACKFailureCount += val;
2405 memcpy(stats, &ar->stats, sizeof(*stats));
2406 mutex_unlock(&ar->mutex);
2411 static int ar9170_get_tx_stats(struct ieee80211_hw *hw,
2412 struct ieee80211_tx_queue_stats *tx_stats)
2414 struct ar9170 *ar = hw->priv;
2416 spin_lock_bh(&ar->tx_stats_lock);
2417 memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues);
2418 spin_unlock_bh(&ar->tx_stats_lock);
2423 static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
2424 const struct ieee80211_tx_queue_params *param)
2426 struct ar9170 *ar = hw->priv;
2429 mutex_lock(&ar->mutex);
2430 if (queue < __AR9170_NUM_TXQ) {
2431 memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
2432 param, sizeof(*param));
2434 ret = ar9170_set_qos(ar);
2439 mutex_unlock(&ar->mutex);
2443 static int ar9170_ampdu_action(struct ieee80211_hw *hw,
2444 struct ieee80211_vif *vif,
2445 enum ieee80211_ampdu_mlme_action action,
2446 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2448 struct ar9170 *ar = hw->priv;
2449 struct ar9170_sta_info *sta_info = (void *) sta->drv_priv;
2450 struct ar9170_sta_tid *tid_info = &sta_info->agg[tid];
2451 unsigned long flags;
2457 case IEEE80211_AMPDU_TX_START:
2458 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2459 if (tid_info->state != AR9170_TID_STATE_SHUTDOWN ||
2460 !list_empty(&tid_info->list)) {
2461 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2462 #ifdef AR9170_TXAGG_DEBUG
2463 printk(KERN_INFO "%s: A-MPDU [ESS:[%pM] tid:[%d]] "
2464 "is in a very bad state!\n",
2465 wiphy_name(hw->wiphy), sta->addr, tid);
2466 #endif /* AR9170_TXAGG_DEBUG */
2470 *ssn = tid_info->ssn;
2471 tid_info->state = AR9170_TID_STATE_PROGRESS;
2472 tid_info->active = false;
2473 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2474 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2477 case IEEE80211_AMPDU_TX_STOP:
2478 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2479 tid_info->state = AR9170_TID_STATE_SHUTDOWN;
2480 list_del_init(&tid_info->list);
2481 tid_info->active = false;
2482 skb_queue_purge(&tid_info->queue);
2483 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2484 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2487 case IEEE80211_AMPDU_TX_OPERATIONAL:
2488 #ifdef AR9170_TXAGG_DEBUG
2489 printk(KERN_INFO "%s: A-MPDU for %pM [tid:%d] Operational.\n",
2490 wiphy_name(hw->wiphy), sta->addr, tid);
2491 #endif /* AR9170_TXAGG_DEBUG */
2492 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2493 sta_info->agg[tid].state = AR9170_TID_STATE_COMPLETE;
2494 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2497 case IEEE80211_AMPDU_RX_START:
2498 case IEEE80211_AMPDU_RX_STOP:
2499 /* Handled by firmware */
2509 static const struct ieee80211_ops ar9170_ops = {
2510 .start = ar9170_op_start,
2511 .stop = ar9170_op_stop,
2513 .add_interface = ar9170_op_add_interface,
2514 .remove_interface = ar9170_op_remove_interface,
2515 .config = ar9170_op_config,
2516 .prepare_multicast = ar9170_op_prepare_multicast,
2517 .configure_filter = ar9170_op_configure_filter,
2518 .conf_tx = ar9170_conf_tx,
2519 .bss_info_changed = ar9170_op_bss_info_changed,
2520 .get_tsf = ar9170_op_get_tsf,
2521 .set_key = ar9170_set_key,
2522 .sta_notify = ar9170_sta_notify,
2523 .get_stats = ar9170_get_stats,
2524 .get_tx_stats = ar9170_get_tx_stats,
2525 .ampdu_action = ar9170_ampdu_action,
2528 void *ar9170_alloc(size_t priv_size)
2530 struct ieee80211_hw *hw;
2532 struct sk_buff *skb;
2536 * this buffer is used for rx stream reconstruction.
2537 * Under heavy load this device (or the transport layer?)
2538 * tends to split the streams into seperate rx descriptors.
2541 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL);
2545 hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
2551 ar->rx_failover = skb;
2553 mutex_init(&ar->mutex);
2554 spin_lock_init(&ar->cmdlock);
2555 spin_lock_init(&ar->tx_stats_lock);
2556 spin_lock_init(&ar->tx_ampdu_list_lock);
2557 skb_queue_head_init(&ar->tx_status_ampdu);
2558 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
2559 skb_queue_head_init(&ar->tx_status[i]);
2560 skb_queue_head_init(&ar->tx_pending[i]);
2562 ar9170_rx_reset_rx_mpdu(ar);
2563 INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
2564 INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
2565 INIT_LIST_HEAD(&ar->tx_ampdu_list);
2567 /* all hw supports 2.4 GHz, so set channel to 1 by default */
2568 ar->channel = &ar9170_2ghz_chantable[0];
2570 /* first part of wiphy init */
2571 ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2572 BIT(NL80211_IFTYPE_WDS) |
2573 BIT(NL80211_IFTYPE_ADHOC);
2574 ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
2575 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2576 IEEE80211_HW_SIGNAL_DBM |
2577 IEEE80211_HW_NOISE_DBM;
2580 ar->hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2582 ar9170_band_2GHz.ht_cap.ht_supported = false;
2583 ar9170_band_5GHz.ht_cap.ht_supported = false;
2586 ar->hw->queues = __AR9170_NUM_TXQ;
2587 ar->hw->extra_tx_headroom = 8;
2588 ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
2590 ar->hw->max_rates = 1;
2591 ar->hw->max_rate_tries = 3;
2593 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
2594 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
2600 return ERR_PTR(-ENOMEM);
2603 static int ar9170_read_eeprom(struct ar9170 *ar)
2605 #define RW 8 /* number of words to read at once */
2606 #define RB (sizeof(u32) * RW)
2607 struct ath_regulatory *regulatory = &ar->common.regulatory;
2608 u8 *eeprom = (void *)&ar->eeprom;
2609 u8 *addr = ar->eeprom.mac_address;
2611 unsigned int rx_streams, tx_streams, tx_params = 0;
2612 int i, j, err, bands = 0;
2614 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
2616 BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
2618 /* don't want to handle trailing remains */
2619 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
2622 for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
2623 for (j = 0; j < RW; j++)
2624 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
2627 err = ar->exec_cmd(ar, AR9170_CMD_RREG,
2628 RB, (u8 *) &offsets,
2629 RB, eeprom + RB * i);
2637 if (ar->eeprom.length == cpu_to_le16(0xFFFF))
2640 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
2641 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
2644 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
2645 ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
2649 rx_streams = hweight8(ar->eeprom.rx_mask);
2650 tx_streams = hweight8(ar->eeprom.tx_mask);
2652 if (rx_streams != tx_streams)
2653 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
2655 if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS)
2656 tx_params = (tx_streams - 1) <<
2657 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2659 ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
2660 ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
2663 * I measured this, a bandswitch takes roughly
2664 * 135 ms and a frequency switch about 80.
2666 * FIXME: measure these values again once EEPROM settings
2667 * are used, that will influence them!
2670 ar->hw->channel_change_time = 135 * 1000;
2672 ar->hw->channel_change_time = 80 * 1000;
2674 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
2675 regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
2677 /* second part of wiphy init */
2678 SET_IEEE80211_PERM_ADDR(ar->hw, addr);
2680 return bands ? 0 : -EINVAL;
2683 static int ar9170_reg_notifier(struct wiphy *wiphy,
2684 struct regulatory_request *request)
2686 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
2687 struct ar9170 *ar = hw->priv;
2689 return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
2692 int ar9170_register(struct ar9170 *ar, struct device *pdev)
2694 struct ath_regulatory *regulatory = &ar->common.regulatory;
2697 /* try to read EEPROM, init MAC addr */
2698 err = ar9170_read_eeprom(ar);
2702 err = ath_regd_init(regulatory, ar->hw->wiphy,
2703 ar9170_reg_notifier);
2707 err = ieee80211_register_hw(ar->hw);
2711 if (!ath_is_world_regd(regulatory))
2712 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
2714 err = ar9170_init_leds(ar);
2718 #ifdef CONFIG_AR9170_LEDS
2719 err = ar9170_register_leds(ar);
2722 #endif /* CONFIG_AR9170_LEDS */
2724 dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
2725 wiphy_name(ar->hw->wiphy));
2730 ieee80211_unregister_hw(ar->hw);
2736 void ar9170_unregister(struct ar9170 *ar)
2738 #ifdef CONFIG_AR9170_LEDS
2739 ar9170_unregister_leds(ar);
2740 #endif /* CONFIG_AR9170_LEDS */
2742 kfree_skb(ar->rx_failover);
2743 ieee80211_unregister_hw(ar->hw);
2744 mutex_destroy(&ar->mutex);