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_h(struct ieee80211_hdr *hdr)
199 return (ieee80211_get_qos_ctl(hdr))[0] & IEEE80211_QOS_CTL_TID_MASK;
202 static inline u16 ar9170_get_tid(struct sk_buff *skb)
204 struct ar9170_tx_control *txc = (void *) skb->data;
205 return ar9170_get_tid_h((struct ieee80211_hdr *) txc->frame_data);
208 #define GET_NEXT_SEQ(seq) ((seq + 1) & 0x0fff)
209 #define GET_NEXT_SEQ_FROM_SKB(skb) (GET_NEXT_SEQ(ar9170_get_seq(skb)))
211 #if (defined AR9170_QUEUE_DEBUG) || (defined AR9170_TXAGG_DEBUG)
212 static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
214 struct ar9170_tx_control *txc = (void *) skb->data;
215 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
216 struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
217 struct ieee80211_hdr *hdr = (void *) txc->frame_data;
219 printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] s:%d "
220 "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
221 wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
222 ieee80211_get_DA(hdr), ar9170_get_seq_h(hdr),
223 le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
224 jiffies_to_msecs(arinfo->timeout - jiffies));
227 static void __ar9170_dump_txqueue(struct ar9170 *ar,
228 struct sk_buff_head *queue)
233 printk(KERN_DEBUG "---[ cut here ]---\n");
234 printk(KERN_DEBUG "%s: %d entries in queue.\n",
235 wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
237 skb_queue_walk(queue, skb) {
238 printk(KERN_DEBUG "index:%d => \n", i++);
239 ar9170_print_txheader(ar, skb);
241 if (i != skb_queue_len(queue))
242 printk(KERN_DEBUG "WARNING: queue frame counter "
243 "mismatch %d != %d\n", skb_queue_len(queue), i);
244 printk(KERN_DEBUG "---[ end ]---\n");
246 #endif /* AR9170_QUEUE_DEBUG || AR9170_TXAGG_DEBUG */
248 #ifdef AR9170_QUEUE_DEBUG
249 static void ar9170_dump_txqueue(struct ar9170 *ar,
250 struct sk_buff_head *queue)
254 spin_lock_irqsave(&queue->lock, flags);
255 __ar9170_dump_txqueue(ar, queue);
256 spin_unlock_irqrestore(&queue->lock, flags);
258 #endif /* AR9170_QUEUE_DEBUG */
260 #ifdef AR9170_QUEUE_STOP_DEBUG
261 static void __ar9170_dump_txstats(struct ar9170 *ar)
265 printk(KERN_DEBUG "%s: QoS queue stats\n",
266 wiphy_name(ar->hw->wiphy));
268 for (i = 0; i < __AR9170_NUM_TXQ; i++)
269 printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d "
270 " stopped:%d\n", wiphy_name(ar->hw->wiphy), i,
271 ar->tx_stats[i].limit, ar->tx_stats[i].len,
272 skb_queue_len(&ar->tx_status[i]),
273 ieee80211_queue_stopped(ar->hw, i));
275 #endif /* AR9170_QUEUE_STOP_DEBUG */
277 #ifdef AR9170_TXAGG_DEBUG
278 static void ar9170_dump_tx_status_ampdu(struct ar9170 *ar)
282 spin_lock_irqsave(&ar->tx_status_ampdu.lock, flags);
283 printk(KERN_DEBUG "%s: A-MPDU tx_status queue => \n",
284 wiphy_name(ar->hw->wiphy));
285 __ar9170_dump_txqueue(ar, &ar->tx_status_ampdu);
286 spin_unlock_irqrestore(&ar->tx_status_ampdu.lock, flags);
289 #endif /* AR9170_TXAGG_DEBUG */
291 /* caller must guarantee exclusive access for _bin_ queue. */
292 static void ar9170_recycle_expired(struct ar9170 *ar,
293 struct sk_buff_head *queue,
294 struct sk_buff_head *bin)
296 struct sk_buff *skb, *old = NULL;
299 spin_lock_irqsave(&queue->lock, flags);
300 while ((skb = skb_peek(queue))) {
301 struct ieee80211_tx_info *txinfo;
302 struct ar9170_tx_info *arinfo;
304 txinfo = IEEE80211_SKB_CB(skb);
305 arinfo = (void *) txinfo->rate_driver_data;
307 if (time_is_before_jiffies(arinfo->timeout)) {
308 #ifdef AR9170_QUEUE_DEBUG
309 printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => "
310 "recycle \n", wiphy_name(ar->hw->wiphy),
311 jiffies, arinfo->timeout);
312 ar9170_print_txheader(ar, skb);
313 #endif /* AR9170_QUEUE_DEBUG */
314 __skb_unlink(skb, queue);
315 __skb_queue_tail(bin, skb);
320 if (unlikely(old == skb)) {
321 /* bail out - queue is shot. */
328 spin_unlock_irqrestore(&queue->lock, flags);
331 static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
334 struct ieee80211_tx_info *txinfo;
335 unsigned int retries = 0;
337 txinfo = IEEE80211_SKB_CB(skb);
338 ieee80211_tx_info_clear_status(txinfo);
341 case AR9170_TX_STATUS_RETRY:
343 case AR9170_TX_STATUS_COMPLETE:
344 txinfo->flags |= IEEE80211_TX_STAT_ACK;
347 case AR9170_TX_STATUS_FAILED:
348 retries = ar->hw->conf.long_frame_max_tx_count;
352 printk(KERN_ERR "%s: invalid tx_status response (%x).\n",
353 wiphy_name(ar->hw->wiphy), tx_status);
357 txinfo->status.rates[0].count = retries + 1;
358 skb_pull(skb, sizeof(struct ar9170_tx_control));
359 ieee80211_tx_status_irqsafe(ar->hw, skb);
362 static void ar9170_tx_fake_ampdu_status(struct ar9170 *ar)
364 struct sk_buff_head success;
367 unsigned long queue_bitmap = 0;
369 skb_queue_head_init(&success);
371 while (skb_queue_len(&ar->tx_status_ampdu) > AR9170_NUM_TX_STATUS)
372 __skb_queue_tail(&success, skb_dequeue(&ar->tx_status_ampdu));
374 ar9170_recycle_expired(ar, &ar->tx_status_ampdu, &success);
376 #ifdef AR9170_TXAGG_DEBUG
377 printk(KERN_DEBUG "%s: collected %d A-MPDU frames.\n",
378 wiphy_name(ar->hw->wiphy), skb_queue_len(&success));
379 __ar9170_dump_txqueue(ar, &success);
380 #endif /* AR9170_TXAGG_DEBUG */
382 while ((skb = __skb_dequeue(&success))) {
383 struct ieee80211_tx_info *txinfo;
385 queue_bitmap |= BIT(skb_get_queue_mapping(skb));
387 txinfo = IEEE80211_SKB_CB(skb);
388 ieee80211_tx_info_clear_status(txinfo);
390 txinfo->flags |= IEEE80211_TX_STAT_ACK;
391 txinfo->status.rates[0].count = 1;
393 skb_pull(skb, sizeof(struct ar9170_tx_control));
394 ieee80211_tx_status_irqsafe(ar->hw, skb);
397 for_each_bit(i, &queue_bitmap, BITS_PER_BYTE) {
398 #ifdef AR9170_QUEUE_STOP_DEBUG
399 printk(KERN_DEBUG "%s: wake queue %d\n",
400 wiphy_name(ar->hw->wiphy), i);
401 __ar9170_dump_txstats(ar);
402 #endif /* AR9170_QUEUE_STOP_DEBUG */
403 ieee80211_wake_queue(ar->hw, i);
410 static void ar9170_tx_ampdu_callback(struct ar9170 *ar, struct sk_buff *skb)
412 struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
413 struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
415 arinfo->timeout = jiffies +
416 msecs_to_jiffies(AR9170_BA_TIMEOUT);
418 skb_queue_tail(&ar->tx_status_ampdu, skb);
419 ar9170_tx_fake_ampdu_status(ar);
421 if (atomic_dec_and_test(&ar->tx_ampdu_pending) &&
422 !list_empty(&ar->tx_ampdu_list))
426 void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429 struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
430 unsigned int queue = skb_get_queue_mapping(skb);
433 spin_lock_irqsave(&ar->tx_stats_lock, flags);
434 ar->tx_stats[queue].len--;
436 if (ar->tx_stats[queue].len < AR9170_NUM_TX_LIMIT_SOFT) {
437 #ifdef AR9170_QUEUE_STOP_DEBUG
438 printk(KERN_DEBUG "%s: wake queue %d\n",
439 wiphy_name(ar->hw->wiphy), queue);
440 __ar9170_dump_txstats(ar);
441 #endif /* AR9170_QUEUE_STOP_DEBUG */
442 ieee80211_wake_queue(ar->hw, queue);
444 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
446 if (info->flags & IEEE80211_TX_CTL_NO_ACK) {
447 ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
449 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
450 ar9170_tx_ampdu_callback(ar, skb);
452 arinfo->timeout = jiffies +
453 msecs_to_jiffies(AR9170_TX_TIMEOUT);
455 skb_queue_tail(&ar->tx_status[queue], skb);
459 if (!ar->tx_stats[queue].len &&
460 !skb_queue_empty(&ar->tx_pending[queue])) {
465 static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
467 struct sk_buff_head *queue,
474 * Unfortunately, the firmware does not tell to which (queued) frame
475 * this transmission status report belongs to.
477 * So we have to make risky guesses - with the scarce information
478 * the firmware provided (-> destination MAC, and phy_control) -
479 * and hope that we picked the right one...
482 spin_lock_irqsave(&queue->lock, flags);
483 skb_queue_walk(queue, skb) {
484 struct ar9170_tx_control *txc = (void *) skb->data;
485 struct ieee80211_hdr *hdr = (void *) txc->frame_data;
488 if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
489 #ifdef AR9170_QUEUE_DEBUG
490 printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n",
491 wiphy_name(ar->hw->wiphy), mac,
492 ieee80211_get_DA(hdr));
493 ar9170_print_txheader(ar, skb);
494 #endif /* AR9170_QUEUE_DEBUG */
498 r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
499 AR9170_TX_PHY_MCS_SHIFT;
501 if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
502 #ifdef AR9170_QUEUE_DEBUG
503 printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n",
504 wiphy_name(ar->hw->wiphy), rate, r);
505 ar9170_print_txheader(ar, skb);
506 #endif /* AR9170_QUEUE_DEBUG */
510 __skb_unlink(skb, queue);
511 spin_unlock_irqrestore(&queue->lock, flags);
515 #ifdef AR9170_QUEUE_DEBUG
516 printk(KERN_ERR "%s: ESS:[%pM] does not have any "
517 "outstanding frames in queue.\n",
518 wiphy_name(ar->hw->wiphy), mac);
519 __ar9170_dump_txqueue(ar, queue);
520 #endif /* AR9170_QUEUE_DEBUG */
521 spin_unlock_irqrestore(&queue->lock, flags);
526 static void ar9170_handle_block_ack(struct ar9170 *ar, u16 count, u16 r)
529 struct ieee80211_tx_info *txinfo;
532 skb = ar9170_get_queued_skb(ar, NULL, &ar->tx_status_ampdu, r);
536 txinfo = IEEE80211_SKB_CB(skb);
537 ieee80211_tx_info_clear_status(txinfo);
539 /* FIXME: maybe more ? */
540 txinfo->status.rates[0].count = 1;
542 skb_pull(skb, sizeof(struct ar9170_tx_control));
543 ieee80211_tx_status_irqsafe(ar->hw, skb);
547 #ifdef AR9170_TXAGG_DEBUG
549 printk(KERN_DEBUG "%s: got %d more failed mpdus, but no more "
550 "suitable frames left in tx_status queue.\n",
551 wiphy_name(ar->hw->wiphy), count);
553 ar9170_dump_tx_status_ampdu(ar);
555 #endif /* AR9170_TXAGG_DEBUG */
559 * This worker tries to keeps an maintain tx_status queues.
560 * So we can guarantee that incoming tx_status reports are
561 * actually for a pending frame.
564 static void ar9170_tx_janitor(struct work_struct *work)
566 struct ar9170 *ar = container_of(work, struct ar9170,
568 struct sk_buff_head waste;
570 bool resched = false;
572 if (unlikely(!IS_STARTED(ar)))
575 skb_queue_head_init(&waste);
577 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
578 #ifdef AR9170_QUEUE_DEBUG
579 printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n",
580 wiphy_name(ar->hw->wiphy), i);
581 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
582 ar9170_dump_txqueue(ar, &ar->tx_status[i]);
583 #endif /* AR9170_QUEUE_DEBUG */
585 ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
586 ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
587 skb_queue_purge(&waste);
589 if (!skb_queue_empty(&ar->tx_status[i]) ||
590 !skb_queue_empty(&ar->tx_pending[i]))
594 ar9170_tx_fake_ampdu_status(ar);
599 ieee80211_queue_delayed_work(ar->hw,
601 msecs_to_jiffies(AR9170_JANITOR_DELAY));
604 void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
606 struct ar9170_cmd_response *cmd = (void *) buf;
608 if ((cmd->type & 0xc0) != 0xc0) {
609 ar->callback_cmd(ar, len, buf);
613 /* hardware event handlers */
617 * TX status notification:
618 * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
622 * M1-M6 is the MAC address
623 * R1-R4 is the transmit rate
624 * S1-S2 is the transmit status
628 u32 phy = le32_to_cpu(cmd->tx_status.rate);
629 u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
630 AR9170_TX_PHY_QOS_SHIFT;
631 #ifdef AR9170_QUEUE_DEBUG
632 printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n",
633 wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q);
634 #endif /* AR9170_QUEUE_DEBUG */
636 skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
638 AR9170_TX_INVALID_RATE);
642 ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
650 if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
651 ieee80211_queue_work(ar->hw, &ar->beacon_work);
656 * (IBSS) beacon send notification
657 * bytes: 04 c2 XX YY B4 B3 B2 B1
661 * B1-B4 "should" be the number of send out beacons.
666 /* End of Atim Window */
670 /* BlockACK bitmap */
674 /* BlockACK events */
675 ar9170_handle_block_ack(ar,
676 le16_to_cpu(cmd->ba_fail_cnt.failed),
677 le16_to_cpu(cmd->ba_fail_cnt.rate));
678 ar9170_tx_fake_ampdu_status(ar);
682 /* Watchdog Interrupt */
686 /* retransmission issue / SIFS/EIFS collision ?! */
691 printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4, (char *)buf + 4);
698 printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n",
702 printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n",
703 le16_to_cpup((__le16 *)((char *)buf + 4)));
706 printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n",
707 le32_to_cpup((__le32 *)((char *)buf + 4)));
710 printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n",
711 (unsigned long)le64_to_cpup(
712 (__le64 *)((char *)buf + 4)));
717 print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE,
718 (char *)buf + 4, len - 4);
722 printk(KERN_INFO "received unhandled event %x\n", cmd->type);
723 print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
728 static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar)
730 memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head));
731 ar->rx_mpdu.has_plcp = false;
734 int ar9170_nag_limiter(struct ar9170 *ar)
739 * we expect all sorts of errors in promiscuous mode.
740 * don't bother with it, it's OK!
742 if (ar->sniffer_enabled)
746 * only go for frequent errors! The hardware tends to
747 * do some stupid thing once in a while under load, in
748 * noisy environments or just for fun!
750 if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit())
751 print_message = true;
753 print_message = false;
755 /* reset threshold for "once in a while" */
756 ar->bad_hw_nagger = jiffies + HZ / 4;
757 return print_message;
760 static int ar9170_rx_mac_status(struct ar9170 *ar,
761 struct ar9170_rx_head *head,
762 struct ar9170_rx_macstatus *mac,
763 struct ieee80211_rx_status *status)
767 BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
768 BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4);
771 if (error & AR9170_RX_ERROR_MMIC) {
772 status->flag |= RX_FLAG_MMIC_ERROR;
773 error &= ~AR9170_RX_ERROR_MMIC;
776 if (error & AR9170_RX_ERROR_PLCP) {
777 status->flag |= RX_FLAG_FAILED_PLCP_CRC;
778 error &= ~AR9170_RX_ERROR_PLCP;
780 if (!(ar->filter_state & FIF_PLCPFAIL))
784 if (error & AR9170_RX_ERROR_FCS) {
785 status->flag |= RX_FLAG_FAILED_FCS_CRC;
786 error &= ~AR9170_RX_ERROR_FCS;
788 if (!(ar->filter_state & FIF_FCSFAIL))
792 decrypt = ar9170_get_decrypt_type(mac);
793 if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
794 decrypt != AR9170_ENC_ALG_NONE)
795 status->flag |= RX_FLAG_DECRYPTED;
797 /* ignore wrong RA errors */
798 error &= ~AR9170_RX_ERROR_WRONG_RA;
800 if (error & AR9170_RX_ERROR_DECRYPT) {
801 error &= ~AR9170_RX_ERROR_DECRYPT;
803 * Rx decryption is done in place,
804 * the original data is lost anyway.
810 /* drop any other error frames */
811 if (unlikely(error)) {
812 /* TODO: update netdevice's RX dropped/errors statistics */
814 if (ar9170_nag_limiter(ar))
815 printk(KERN_DEBUG "%s: received frame with "
816 "suspicious error code (%#x).\n",
817 wiphy_name(ar->hw->wiphy), error);
822 status->band = ar->channel->band;
823 status->freq = ar->channel->center_freq;
825 switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) {
826 case AR9170_RX_STATUS_MODULATION_CCK:
827 if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
828 status->flag |= RX_FLAG_SHORTPRE;
829 switch (head->plcp[0]) {
831 status->rate_idx = 0;
834 status->rate_idx = 1;
837 status->rate_idx = 2;
840 status->rate_idx = 3;
843 if (ar9170_nag_limiter(ar))
844 printk(KERN_ERR "%s: invalid plcp cck rate "
845 "(%x).\n", wiphy_name(ar->hw->wiphy),
851 case AR9170_RX_STATUS_MODULATION_DUPOFDM:
852 case AR9170_RX_STATUS_MODULATION_OFDM:
853 switch (head->plcp[0] & 0xf) {
855 status->rate_idx = 0;
858 status->rate_idx = 1;
861 status->rate_idx = 2;
864 status->rate_idx = 3;
867 status->rate_idx = 4;
870 status->rate_idx = 5;
873 status->rate_idx = 6;
876 status->rate_idx = 7;
879 if (ar9170_nag_limiter(ar))
880 printk(KERN_ERR "%s: invalid plcp ofdm rate "
881 "(%x).\n", wiphy_name(ar->hw->wiphy),
885 if (status->band == IEEE80211_BAND_2GHZ)
886 status->rate_idx += 4;
889 case AR9170_RX_STATUS_MODULATION_HT:
890 if (head->plcp[3] & 0x80)
891 status->flag |= RX_FLAG_40MHZ;
892 if (head->plcp[6] & 0x80)
893 status->flag |= RX_FLAG_SHORT_GI;
895 status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f);
896 status->flag |= RX_FLAG_HT;
900 if (ar9170_nag_limiter(ar))
901 printk(KERN_ERR "%s: invalid modulation\n",
902 wiphy_name(ar->hw->wiphy));
909 static void ar9170_rx_phy_status(struct ar9170 *ar,
910 struct ar9170_rx_phystatus *phy,
911 struct ieee80211_rx_status *status)
915 BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20);
917 for (i = 0; i < 3; i++)
918 if (phy->rssi[i] != 0x80)
919 status->antenna |= BIT(i);
921 /* post-process RSSI */
922 for (i = 0; i < 7; i++)
923 if (phy->rssi[i] & 0x80)
924 phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f;
926 /* TODO: we could do something with phy_errors */
927 status->signal = ar->noise[0] + phy->rssi_combined;
928 status->noise = ar->noise[0];
931 static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len)
935 struct ieee80211_hdr *hdr = (void *) buf;
937 if (ieee80211_is_data_qos(hdr->frame_control)) {
938 u8 *qc = ieee80211_get_qos_ctl(hdr);
939 reserved += NET_IP_ALIGN;
941 if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
942 reserved += NET_IP_ALIGN;
945 if (ieee80211_has_a4(hdr->frame_control))
946 reserved += NET_IP_ALIGN;
948 reserved = 32 + (reserved & NET_IP_ALIGN);
950 skb = dev_alloc_skb(len + reserved);
952 skb_reserve(skb, reserved);
953 memcpy(skb_put(skb, len), buf, len);
960 * If the frame alignment is right (or the kernel has
961 * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
962 * is only a single MPDU in the USB frame, then we could
963 * submit to mac80211 the SKB directly. However, since
964 * there may be multiple packets in one SKB in stream
965 * mode, and we need to observe the proper ordering,
966 * this is non-trivial.
969 static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
971 struct ar9170_rx_head *head;
972 struct ar9170_rx_macstatus *mac;
973 struct ar9170_rx_phystatus *phy = NULL;
974 struct ieee80211_rx_status status;
978 if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac))))
982 mpdu_len = len - sizeof(*mac);
984 mac = (void *)(buf + mpdu_len);
985 if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) {
986 /* this frame is too damaged and can't be used - drop it */
991 switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) {
992 case AR9170_RX_STATUS_MPDU_FIRST:
993 /* first mpdu packet has the plcp header */
994 if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) {
996 memcpy(&ar->rx_mpdu.plcp, (void *) buf,
997 sizeof(struct ar9170_rx_head));
999 mpdu_len -= sizeof(struct ar9170_rx_head);
1000 buf += sizeof(struct ar9170_rx_head);
1001 ar->rx_mpdu.has_plcp = true;
1003 if (ar9170_nag_limiter(ar))
1004 printk(KERN_ERR "%s: plcp info is clipped.\n",
1005 wiphy_name(ar->hw->wiphy));
1010 case AR9170_RX_STATUS_MPDU_LAST:
1011 /* last mpdu has a extra tail with phy status information */
1013 if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) {
1014 mpdu_len -= sizeof(struct ar9170_rx_phystatus);
1015 phy = (void *)(buf + mpdu_len);
1017 if (ar9170_nag_limiter(ar))
1018 printk(KERN_ERR "%s: frame tail is clipped.\n",
1019 wiphy_name(ar->hw->wiphy));
1023 case AR9170_RX_STATUS_MPDU_MIDDLE:
1024 /* middle mpdus are just data */
1025 if (unlikely(!ar->rx_mpdu.has_plcp)) {
1026 if (!ar9170_nag_limiter(ar))
1029 printk(KERN_ERR "%s: rx stream did not start "
1030 "with a first_mpdu frame tag.\n",
1031 wiphy_name(ar->hw->wiphy));
1036 head = &ar->rx_mpdu.plcp;
1039 case AR9170_RX_STATUS_MPDU_SINGLE:
1040 /* single mpdu - has plcp (head) and phy status (tail) */
1041 head = (void *) buf;
1043 mpdu_len -= sizeof(struct ar9170_rx_head);
1044 mpdu_len -= sizeof(struct ar9170_rx_phystatus);
1046 buf += sizeof(struct ar9170_rx_head);
1047 phy = (void *)(buf + mpdu_len);
1055 if (unlikely(mpdu_len < FCS_LEN))
1058 memset(&status, 0, sizeof(status));
1059 if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status)))
1063 ar9170_rx_phy_status(ar, phy, &status);
1065 skb = ar9170_rx_copy_data(buf, mpdu_len);
1067 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1068 ieee80211_rx_irqsafe(ar->hw, skb);
1072 void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
1074 unsigned int i, tlen, resplen, wlen = 0, clen = 0;
1081 clen = tbuf[1] << 8 | tbuf[0];
1082 wlen = ALIGN(clen, 4);
1084 /* check if this is stream has a valid tag.*/
1085 if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
1087 * TODO: handle the highly unlikely event that the
1088 * corrupted stream has the TAG at the right position.
1091 /* check if the frame can be repaired. */
1092 if (!ar->rx_failover_missing) {
1093 /* this is no "short read". */
1094 if (ar9170_nag_limiter(ar)) {
1095 printk(KERN_ERR "%s: missing tag!\n",
1096 wiphy_name(ar->hw->wiphy));
1102 if (ar->rx_failover_missing > tlen) {
1103 if (ar9170_nag_limiter(ar)) {
1104 printk(KERN_ERR "%s: possible multi "
1105 "stream corruption!\n",
1106 wiphy_name(ar->hw->wiphy));
1112 memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
1113 ar->rx_failover_missing -= tlen;
1115 if (ar->rx_failover_missing <= 0) {
1117 * nested ar9170_rx call!
1118 * termination is guranteed, even when the
1119 * combined frame also have a element with
1123 ar->rx_failover_missing = 0;
1124 ar9170_rx(ar, ar->rx_failover);
1126 skb_reset_tail_pointer(ar->rx_failover);
1127 skb_trim(ar->rx_failover, 0);
1133 /* check if stream is clipped */
1134 if (wlen > tlen - 4) {
1135 if (ar->rx_failover_missing) {
1136 /* TODO: handle double stream corruption. */
1137 if (ar9170_nag_limiter(ar)) {
1138 printk(KERN_ERR "%s: double rx stream "
1140 wiphy_name(ar->hw->wiphy));
1147 * save incomplete data set.
1148 * the firmware will resend the missing bits when
1149 * the rx - descriptor comes round again.
1152 memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
1153 ar->rx_failover_missing = clen - tlen;
1163 /* weird thing, but this is the same in the original driver */
1164 while (resplen > 2 && i < 12 &&
1165 respbuf[0] == 0xff && respbuf[1] == 0xff) {
1174 /* found the 6 * 0xffff marker? */
1176 ar9170_handle_command_response(ar, respbuf, resplen);
1178 ar9170_handle_mpdu(ar, respbuf, clen);
1182 if (net_ratelimit())
1183 printk(KERN_ERR "%s: %d bytes of unprocessed "
1184 "data left in rx stream!\n",
1185 wiphy_name(ar->hw->wiphy), tlen);
1193 printk(KERN_ERR "%s: damaged RX stream data [want:%d, "
1194 "data:%d, rx:%d, pending:%d ]\n",
1195 wiphy_name(ar->hw->wiphy), clen, wlen, tlen,
1196 ar->rx_failover_missing);
1198 if (ar->rx_failover_missing)
1199 print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET,
1200 ar->rx_failover->data,
1201 ar->rx_failover->len);
1203 print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET,
1204 skb->data, skb->len);
1206 printk(KERN_ERR "%s: please check your hardware and cables, if "
1207 "you see this message frequently.\n",
1208 wiphy_name(ar->hw->wiphy));
1211 if (ar->rx_failover_missing) {
1212 skb_reset_tail_pointer(ar->rx_failover);
1213 skb_trim(ar->rx_failover, 0);
1214 ar->rx_failover_missing = 0;
1218 #define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
1220 queue.aifs = ai_fs; \
1221 queue.cw_min = cwmin; \
1222 queue.cw_max = cwmax; \
1223 queue.txop = _txop; \
1226 static int ar9170_op_start(struct ieee80211_hw *hw)
1228 struct ar9170 *ar = hw->priv;
1231 mutex_lock(&ar->mutex);
1233 /* reinitialize queues statistics */
1234 memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
1235 for (i = 0; i < __AR9170_NUM_TXQ; i++)
1236 ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
1238 /* reset QoS defaults */
1239 AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
1240 AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */
1241 AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */
1242 AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */
1243 AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
1245 /* set sane AMPDU defaults */
1246 ar->global_ampdu_density = 6;
1247 ar->global_ampdu_factor = 3;
1249 atomic_set(&ar->tx_ampdu_pending, 0);
1250 ar->bad_hw_nagger = jiffies;
1256 err = ar9170_init_mac(ar);
1260 err = ar9170_set_qos(ar);
1264 err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
1268 err = ar9170_init_rf(ar);
1273 err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
1277 ar->state = AR9170_STARTED;
1280 mutex_unlock(&ar->mutex);
1284 static void ar9170_op_stop(struct ieee80211_hw *hw)
1286 struct ar9170 *ar = hw->priv;
1290 ar->state = AR9170_IDLE;
1292 cancel_delayed_work_sync(&ar->tx_janitor);
1293 #ifdef CONFIG_AR9170_LEDS
1294 cancel_delayed_work_sync(&ar->led_work);
1296 cancel_work_sync(&ar->beacon_work);
1298 mutex_lock(&ar->mutex);
1300 if (IS_ACCEPTING_CMD(ar)) {
1301 ar9170_set_leds_state(ar, 0);
1304 ar9170_write_reg(ar, 0x1c3d30, 0);
1308 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1309 skb_queue_purge(&ar->tx_pending[i]);
1310 skb_queue_purge(&ar->tx_status[i]);
1312 skb_queue_purge(&ar->tx_status_ampdu);
1314 mutex_unlock(&ar->mutex);
1317 static void ar9170_tx_indicate_immba(struct ar9170 *ar, struct sk_buff *skb)
1319 struct ar9170_tx_control *txc = (void *) skb->data;
1321 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_IMM_AMPDU);
1324 static void ar9170_tx_copy_phy(struct ar9170 *ar, struct sk_buff *dst,
1325 struct sk_buff *src)
1327 struct ar9170_tx_control *dst_txc, *src_txc;
1328 struct ieee80211_tx_info *dst_info, *src_info;
1329 struct ar9170_tx_info *dst_arinfo, *src_arinfo;
1331 src_txc = (void *) src->data;
1332 src_info = IEEE80211_SKB_CB(src);
1333 src_arinfo = (void *) src_info->rate_driver_data;
1335 dst_txc = (void *) dst->data;
1336 dst_info = IEEE80211_SKB_CB(dst);
1337 dst_arinfo = (void *) dst_info->rate_driver_data;
1339 dst_txc->phy_control = src_txc->phy_control;
1341 /* same MCS for the whole aggregate */
1342 memcpy(dst_info->driver_rates, src_info->driver_rates,
1343 sizeof(dst_info->driver_rates));
1346 static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
1348 struct ieee80211_hdr *hdr;
1349 struct ar9170_tx_control *txc;
1350 struct ieee80211_tx_info *info;
1351 struct ieee80211_tx_rate *txrate;
1352 struct ar9170_tx_info *arinfo;
1353 unsigned int queue = skb_get_queue_mapping(skb);
1357 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1359 hdr = (void *)skb->data;
1360 info = IEEE80211_SKB_CB(skb);
1363 txc = (void *)skb_push(skb, sizeof(*txc));
1365 if (info->control.hw_key) {
1366 icv = info->control.hw_key->icv_len;
1368 switch (info->control.hw_key->alg) {
1370 keytype = AR9170_TX_MAC_ENCR_RC4;
1373 keytype = AR9170_TX_MAC_ENCR_RC4;
1376 keytype = AR9170_TX_MAC_ENCR_AES;
1385 txc->length = cpu_to_le16(len + icv + 4);
1387 txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
1388 AR9170_TX_MAC_BACKOFF);
1389 txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
1390 AR9170_TX_MAC_QOS_SHIFT);
1391 txc->mac_control |= cpu_to_le16(keytype);
1392 txc->phy_control = cpu_to_le32(0);
1394 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1395 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
1397 txrate = &info->control.rates[0];
1398 if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1399 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
1400 else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1401 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
1403 arinfo = (void *)info->rate_driver_data;
1404 arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
1406 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
1407 (is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
1410 * Putting the QoS queue bits into an unexplored territory is
1411 * certainly not elegant.
1413 * In my defense: This idea provides a reasonable way to
1414 * smuggle valuable information to the tx_status callback.
1415 * Also, the idea behind this bit-abuse came straight from
1416 * the original driver code.
1420 cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
1422 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1423 if (unlikely(!info->control.sta))
1426 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
1428 txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
1435 skb_pull(skb, sizeof(*txc));
1439 static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
1441 struct ar9170_tx_control *txc;
1442 struct ieee80211_tx_info *info;
1443 struct ieee80211_rate *rate = NULL;
1444 struct ieee80211_tx_rate *txrate;
1447 txc = (void *) skb->data;
1448 info = IEEE80211_SKB_CB(skb);
1449 txrate = &info->control.rates[0];
1451 if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1452 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
1454 if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1455 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
1457 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1458 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
1459 /* this works because 40 MHz is 2 and dup is 3 */
1460 if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
1461 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
1463 if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
1464 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
1466 if (txrate->flags & IEEE80211_TX_RC_MCS) {
1467 u32 r = txrate->idx;
1470 /* heavy clip control */
1471 txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
1473 r <<= AR9170_TX_PHY_MCS_SHIFT;
1474 BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
1476 txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
1477 txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
1479 if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
1480 if (info->band == IEEE80211_BAND_5GHZ)
1481 txpower = ar->power_5G_ht40;
1483 txpower = ar->power_2G_ht40;
1485 if (info->band == IEEE80211_BAND_5GHZ)
1486 txpower = ar->power_5G_ht20;
1488 txpower = ar->power_2G_ht20;
1491 power = txpower[(txrate->idx) & 7];
1496 u8 idx = txrate->idx;
1498 if (info->band != IEEE80211_BAND_2GHZ) {
1500 txpower = ar->power_5G_leg;
1501 mod = AR9170_TX_PHY_MOD_OFDM;
1504 txpower = ar->power_2G_cck;
1505 mod = AR9170_TX_PHY_MOD_CCK;
1507 mod = AR9170_TX_PHY_MOD_OFDM;
1508 txpower = ar->power_2G_ofdm;
1512 rate = &__ar9170_ratetable[idx];
1514 phyrate = rate->hw_value & 0xF;
1515 power = txpower[(rate->hw_value & 0x30) >> 4];
1516 phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
1518 txc->phy_control |= cpu_to_le32(mod);
1519 txc->phy_control |= cpu_to_le32(phyrate);
1522 power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
1523 power &= AR9170_TX_PHY_TX_PWR_MASK;
1524 txc->phy_control |= cpu_to_le32(power);
1527 if (ar->eeprom.tx_mask == 1) {
1528 chains = AR9170_TX_PHY_TXCHAIN_1;
1530 chains = AR9170_TX_PHY_TXCHAIN_2;
1532 /* >= 36M legacy OFDM - use only one chain */
1533 if (rate && rate->bitrate >= 360)
1534 chains = AR9170_TX_PHY_TXCHAIN_1;
1536 txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
1539 static bool ar9170_tx_ampdu(struct ar9170 *ar)
1541 struct sk_buff_head agg;
1542 struct ar9170_sta_tid *tid_info = NULL, *tmp;
1543 struct sk_buff *skb, *first = NULL;
1544 unsigned long flags, f2;
1546 u16 seq, queue, tmpssn;
1549 skb_queue_head_init(&agg);
1551 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1552 if (list_empty(&ar->tx_ampdu_list)) {
1553 #ifdef AR9170_TXAGG_DEBUG
1554 printk(KERN_DEBUG "%s: aggregation list is empty.\n",
1555 wiphy_name(ar->hw->wiphy));
1556 #endif /* AR9170_TXAGG_DEBUG */
1560 list_for_each_entry_safe(tid_info, tmp, &ar->tx_ampdu_list, list) {
1561 if (tid_info->state != AR9170_TID_STATE_COMPLETE) {
1562 #ifdef AR9170_TXAGG_DEBUG
1563 printk(KERN_DEBUG "%s: dangling aggregation entry!\n",
1564 wiphy_name(ar->hw->wiphy));
1565 #endif /* AR9170_TXAGG_DEBUG */
1570 #ifdef AR9170_TXAGG_DEBUG
1571 printk(KERN_DEBUG "%s: enough frames aggregated.\n",
1572 wiphy_name(ar->hw->wiphy));
1573 #endif /* AR9170_TXAGG_DEBUG */
1577 queue = TID_TO_WME_AC(tid_info->tid);
1579 if (skb_queue_len(&ar->tx_pending[queue]) >=
1580 AR9170_NUM_TX_AGG_MAX) {
1581 #ifdef AR9170_TXAGG_DEBUG
1582 printk(KERN_DEBUG "%s: queue %d full.\n",
1583 wiphy_name(ar->hw->wiphy), queue);
1584 #endif /* AR9170_TXAGG_DEBUG */
1588 list_del_init(&tid_info->list);
1590 spin_lock_irqsave(&tid_info->queue.lock, f2);
1591 tmpssn = seq = tid_info->ssn;
1592 first = skb_peek(&tid_info->queue);
1595 tmpssn = ar9170_get_seq(first);
1597 if (unlikely(tmpssn != seq)) {
1598 #ifdef AR9170_TXAGG_DEBUG
1599 printk(KERN_DEBUG "%s: ssn mismatch [%d != %d]\n.",
1600 wiphy_name(ar->hw->wiphy), seq, tmpssn);
1601 #endif /* AR9170_TXAGG_DEBUG */
1602 tid_info->ssn = tmpssn;
1605 #ifdef AR9170_TXAGG_DEBUG
1606 printk(KERN_DEBUG "%s: generate A-MPDU for tid:%d ssn:%d with "
1607 "%d queued frames.\n", wiphy_name(ar->hw->wiphy),
1608 tid_info->tid, tid_info->ssn,
1609 skb_queue_len(&tid_info->queue));
1610 __ar9170_dump_txqueue(ar, &tid_info->queue);
1611 #endif /* AR9170_TXAGG_DEBUG */
1613 while ((skb = skb_peek(&tid_info->queue))) {
1614 if (unlikely(ar9170_get_seq(skb) != seq))
1617 __skb_unlink(skb, &tid_info->queue);
1618 tid_info->ssn = seq = GET_NEXT_SEQ(seq);
1620 if (unlikely(skb_get_queue_mapping(skb) != queue)) {
1621 #ifdef AR9170_TXAGG_DEBUG
1622 printk(KERN_DEBUG "%s: tid:%d(q:%d) queue:%d "
1623 "!match.\n", wiphy_name(ar->hw->wiphy),
1625 TID_TO_WME_AC(tid_info->tid),
1626 skb_get_queue_mapping(skb));
1627 #endif /* AR9170_TXAGG_DEBUG */
1628 dev_kfree_skb_any(skb);
1632 if (unlikely(first == skb)) {
1633 ar9170_tx_prepare_phy(ar, skb);
1634 __skb_queue_tail(&agg, skb);
1637 ar9170_tx_copy_phy(ar, skb, first);
1638 __skb_queue_tail(&agg, skb);
1641 if (unlikely(skb_queue_len(&agg) ==
1642 AR9170_NUM_TX_AGG_MAX))
1646 if (skb_queue_empty(&tid_info->queue))
1647 tid_info->active = false;
1649 list_add_tail(&tid_info->list,
1650 &ar->tx_ampdu_list);
1652 spin_unlock_irqrestore(&tid_info->queue.lock, f2);
1654 if (unlikely(skb_queue_empty(&agg))) {
1655 #ifdef AR9170_TXAGG_DEBUG
1656 printk(KERN_DEBUG "%s: queued empty list!\n",
1657 wiphy_name(ar->hw->wiphy));
1658 #endif /* AR9170_TXAGG_DEBUG */
1663 * tell the FW/HW that this is the last frame,
1664 * that way it will wait for the immediate block ack.
1666 ar9170_tx_indicate_immba(ar, skb_peek_tail(&agg));
1668 #ifdef AR9170_TXAGG_DEBUG
1669 printk(KERN_DEBUG "%s: generated A-MPDU looks like this:\n",
1670 wiphy_name(ar->hw->wiphy));
1671 __ar9170_dump_txqueue(ar, &agg);
1672 #endif /* AR9170_TXAGG_DEBUG */
1674 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1676 spin_lock_irqsave(&ar->tx_pending[queue].lock, flags);
1677 skb_queue_splice_tail_init(&agg, &ar->tx_pending[queue]);
1678 spin_unlock_irqrestore(&ar->tx_pending[queue].lock, flags);
1681 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1685 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1686 __skb_queue_purge(&agg);
1691 static void ar9170_tx(struct ar9170 *ar)
1693 struct sk_buff *skb;
1694 unsigned long flags;
1695 struct ieee80211_tx_info *info;
1696 struct ar9170_tx_info *arinfo;
1697 unsigned int i, frames, frames_failed, remaining_space;
1699 bool schedule_garbagecollector = false;
1701 BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1703 if (unlikely(!IS_STARTED(ar)))
1706 remaining_space = AR9170_TX_MAX_PENDING;
1708 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1709 spin_lock_irqsave(&ar->tx_stats_lock, flags);
1710 frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
1711 skb_queue_len(&ar->tx_pending[i]));
1713 if (remaining_space < frames) {
1714 #ifdef AR9170_QUEUE_DEBUG
1715 printk(KERN_DEBUG "%s: tx quota reached queue:%d, "
1716 "remaining slots:%d, needed:%d\n",
1717 wiphy_name(ar->hw->wiphy), i, remaining_space,
1719 #endif /* AR9170_QUEUE_DEBUG */
1720 frames = remaining_space;
1723 ar->tx_stats[i].len += frames;
1724 ar->tx_stats[i].count += frames;
1725 if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
1726 #ifdef AR9170_QUEUE_DEBUG
1727 printk(KERN_DEBUG "%s: queue %d full\n",
1728 wiphy_name(ar->hw->wiphy), i);
1730 printk(KERN_DEBUG "%s: stuck frames: ===> \n",
1731 wiphy_name(ar->hw->wiphy));
1732 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1733 ar9170_dump_txqueue(ar, &ar->tx_status[i]);
1734 #endif /* AR9170_QUEUE_DEBUG */
1736 #ifdef AR9170_QUEUE_STOP_DEBUG
1737 printk(KERN_DEBUG "%s: stop queue %d\n",
1738 wiphy_name(ar->hw->wiphy), i);
1739 __ar9170_dump_txstats(ar);
1740 #endif /* AR9170_QUEUE_STOP_DEBUG */
1741 ieee80211_stop_queue(ar->hw, i);
1744 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1751 skb = skb_dequeue(&ar->tx_pending[i]);
1752 if (unlikely(!skb)) {
1753 frames_failed += frames;
1758 info = IEEE80211_SKB_CB(skb);
1759 arinfo = (void *) info->rate_driver_data;
1761 /* TODO: cancel stuck frames */
1762 arinfo->timeout = jiffies +
1763 msecs_to_jiffies(AR9170_TX_TIMEOUT);
1765 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1766 atomic_inc(&ar->tx_ampdu_pending);
1768 #ifdef AR9170_QUEUE_DEBUG
1769 printk(KERN_DEBUG "%s: send frame q:%d =>\n",
1770 wiphy_name(ar->hw->wiphy), i);
1771 ar9170_print_txheader(ar, skb);
1772 #endif /* AR9170_QUEUE_DEBUG */
1774 err = ar->tx(ar, skb);
1775 if (unlikely(err)) {
1776 if (info->flags & IEEE80211_TX_CTL_AMPDU)
1777 atomic_dec(&ar->tx_ampdu_pending);
1780 dev_kfree_skb_any(skb);
1783 schedule_garbagecollector = true;
1789 #ifdef AR9170_QUEUE_DEBUG
1790 printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n",
1791 wiphy_name(ar->hw->wiphy), i);
1793 printk(KERN_DEBUG "%s: unprocessed pending frames left:\n",
1794 wiphy_name(ar->hw->wiphy));
1795 ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1796 #endif /* AR9170_QUEUE_DEBUG */
1798 if (unlikely(frames_failed)) {
1799 #ifdef AR9170_QUEUE_DEBUG
1800 printk(KERN_DEBUG "%s: frames failed %d =>\n",
1801 wiphy_name(ar->hw->wiphy), frames_failed);
1802 #endif /* AR9170_QUEUE_DEBUG */
1804 spin_lock_irqsave(&ar->tx_stats_lock, flags);
1805 ar->tx_stats[i].len -= frames_failed;
1806 ar->tx_stats[i].count -= frames_failed;
1807 #ifdef AR9170_QUEUE_STOP_DEBUG
1808 printk(KERN_DEBUG "%s: wake queue %d\n",
1809 wiphy_name(ar->hw->wiphy), i);
1810 __ar9170_dump_txstats(ar);
1811 #endif /* AR9170_QUEUE_STOP_DEBUG */
1812 ieee80211_wake_queue(ar->hw, i);
1813 spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1817 if (!schedule_garbagecollector)
1820 ieee80211_queue_delayed_work(ar->hw,
1822 msecs_to_jiffies(AR9170_JANITOR_DELAY));
1825 static bool ar9170_tx_ampdu_queue(struct ar9170 *ar, struct sk_buff *skb)
1827 struct ieee80211_tx_info *txinfo;
1828 struct ar9170_sta_info *sta_info;
1829 struct ar9170_sta_tid *agg;
1830 struct sk_buff *iter;
1831 unsigned long flags, f2;
1834 bool run = false, queue = false;
1836 tid = ar9170_get_tid(skb);
1837 seq = ar9170_get_seq(skb);
1838 txinfo = IEEE80211_SKB_CB(skb);
1839 sta_info = (void *) txinfo->control.sta->drv_priv;
1840 agg = &sta_info->agg[tid];
1841 max = sta_info->ampdu_max_len;
1843 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
1845 if (unlikely(agg->state != AR9170_TID_STATE_COMPLETE)) {
1846 #ifdef AR9170_TXAGG_DEBUG
1847 printk(KERN_DEBUG "%s: BlockACK session not fully initialized "
1848 "for ESS:%pM tid:%d state:%d.\n",
1849 wiphy_name(ar->hw->wiphy), agg->addr, agg->tid,
1851 #endif /* AR9170_TXAGG_DEBUG */
1861 /* check if seq is within the BA window */
1862 if (unlikely(!BAW_WITHIN(agg->ssn, max, seq))) {
1863 #ifdef AR9170_TXAGG_DEBUG
1864 printk(KERN_DEBUG "%s: frame with tid:%d seq:%d does not "
1865 "fit into BA window (%d - %d)\n",
1866 wiphy_name(ar->hw->wiphy), tid, seq, agg->ssn,
1867 (agg->ssn + max) & 0xfff);
1868 #endif /* AR9170_TXAGG_DEBUG */
1872 spin_lock_irqsave(&agg->queue.lock, f2);
1874 skb_queue_reverse_walk(&agg->queue, iter) {
1875 qseq = ar9170_get_seq(iter);
1877 if (GET_NEXT_SEQ(qseq) == seq) {
1878 __skb_queue_after(&agg->queue, iter, skb);
1883 __skb_queue_head(&agg->queue, skb);
1886 spin_unlock_irqrestore(&agg->queue.lock, f2);
1888 #ifdef AR9170_TXAGG_DEBUG
1889 printk(KERN_DEBUG "%s: new aggregate %p queued.\n",
1890 wiphy_name(ar->hw->wiphy), skb);
1891 __ar9170_dump_txqueue(ar, &agg->queue);
1892 #endif /* AR9170_TXAGG_DEBUG */
1894 if (skb_queue_len(&agg->queue) >= AR9170_NUM_TX_AGG_MAX)
1898 list_add_tail(&agg->list, &ar->tx_ampdu_list);
1900 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1904 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
1905 dev_kfree_skb_irq(skb);
1909 int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1911 struct ar9170 *ar = hw->priv;
1912 struct ieee80211_tx_info *info;
1914 if (unlikely(!IS_STARTED(ar)))
1917 if (unlikely(ar9170_tx_prepare(ar, skb)))
1920 info = IEEE80211_SKB_CB(skb);
1921 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
1922 bool run = ar9170_tx_ampdu_queue(ar, skb);
1924 if (run || !atomic_read(&ar->tx_ampdu_pending))
1925 ar9170_tx_ampdu(ar);
1927 unsigned int queue = skb_get_queue_mapping(skb);
1929 ar9170_tx_prepare_phy(ar, skb);
1930 skb_queue_tail(&ar->tx_pending[queue], skb);
1934 return NETDEV_TX_OK;
1937 dev_kfree_skb_any(skb);
1938 return NETDEV_TX_OK;
1941 static int ar9170_op_add_interface(struct ieee80211_hw *hw,
1942 struct ieee80211_vif *vif)
1944 struct ar9170 *ar = hw->priv;
1945 struct ath_common *common = &ar->common;
1948 mutex_lock(&ar->mutex);
1956 memcpy(common->macaddr, vif->addr, ETH_ALEN);
1958 if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
1959 ar->rx_software_decryption = true;
1960 ar->disable_offload = true;
1964 err = ar9170_update_frame_filter(ar, AR9170_MAC_REG_FTF_DEFAULTS);
1968 err = ar9170_set_operating_mode(ar);
1971 mutex_unlock(&ar->mutex);
1975 static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
1976 struct ieee80211_vif *vif)
1978 struct ar9170 *ar = hw->priv;
1980 mutex_lock(&ar->mutex);
1982 ar9170_update_frame_filter(ar, 0);
1983 ar9170_set_beacon_timers(ar);
1984 dev_kfree_skb(ar->beacon);
1986 ar->sniffer_enabled = false;
1987 ar->rx_software_decryption = false;
1988 ar9170_set_operating_mode(ar);
1989 mutex_unlock(&ar->mutex);
1992 static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
1994 struct ar9170 *ar = hw->priv;
1997 mutex_lock(&ar->mutex);
1999 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
2004 if (changed & IEEE80211_CONF_CHANGE_PS) {
2009 if (changed & IEEE80211_CONF_CHANGE_POWER) {
2014 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
2016 * is it long_frame_max_tx_count or short_frame_max_tx_count?
2019 err = ar9170_set_hwretry_limit(ar,
2020 ar->hw->conf.long_frame_max_tx_count);
2025 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2027 /* adjust slot time for 5 GHz */
2028 err = ar9170_set_slot_time(ar);
2032 err = ar9170_set_dyn_sifs_ack(ar);
2036 err = ar9170_set_channel(ar, hw->conf.channel,
2038 nl80211_to_ar9170(hw->conf.channel_type));
2044 mutex_unlock(&ar->mutex);
2048 static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count,
2049 struct dev_addr_list *mclist)
2054 /* always get broadcast frames */
2055 mchash = 1ULL << (0xff >> 2);
2057 for (i = 0; i < mc_count; i++) {
2058 if (WARN_ON(!mclist))
2060 mchash |= 1ULL << (mclist->dmi_addr[5] >> 2);
2061 mclist = mclist->next;
2067 static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
2068 unsigned int changed_flags,
2069 unsigned int *new_flags,
2072 struct ar9170 *ar = hw->priv;
2074 if (unlikely(!IS_ACCEPTING_CMD(ar)))
2077 mutex_lock(&ar->mutex);
2079 /* mask supported flags */
2080 *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
2081 FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL;
2082 ar->filter_state = *new_flags;
2084 * We can support more by setting the sniffer bit and
2085 * then checking the error flags, later.
2088 if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI)
2091 if (multicast != ar->cur_mc_hash)
2092 ar9170_update_multicast(ar, multicast);
2094 if (changed_flags & FIF_CONTROL) {
2095 u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
2096 AR9170_MAC_REG_FTF_RTS |
2097 AR9170_MAC_REG_FTF_CTS |
2098 AR9170_MAC_REG_FTF_ACK |
2099 AR9170_MAC_REG_FTF_CFE |
2100 AR9170_MAC_REG_FTF_CFE_ACK;
2102 if (*new_flags & FIF_CONTROL)
2103 filter |= ar->cur_filter;
2105 filter &= (~ar->cur_filter);
2107 ar9170_update_frame_filter(ar, filter);
2110 if (changed_flags & FIF_PROMISC_IN_BSS) {
2111 ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
2112 ar9170_set_operating_mode(ar);
2115 mutex_unlock(&ar->mutex);
2119 static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
2120 struct ieee80211_vif *vif,
2121 struct ieee80211_bss_conf *bss_conf,
2124 struct ar9170 *ar = hw->priv;
2125 struct ath_common *common = &ar->common;
2128 mutex_lock(&ar->mutex);
2130 if (changed & BSS_CHANGED_BSSID) {
2131 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
2132 err = ar9170_set_operating_mode(ar);
2137 if (changed & BSS_CHANGED_BEACON_ENABLED)
2138 ar->enable_beacon = bss_conf->enable_beacon;
2140 if (changed & BSS_CHANGED_BEACON) {
2141 err = ar9170_update_beacon(ar);
2146 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
2147 BSS_CHANGED_BEACON_INT)) {
2148 err = ar9170_set_beacon_timers(ar);
2153 if (changed & BSS_CHANGED_ASSOC) {
2154 #ifndef CONFIG_AR9170_LEDS
2155 /* enable assoc LED. */
2156 err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
2157 #endif /* CONFIG_AR9170_LEDS */
2160 if (changed & BSS_CHANGED_HT) {
2165 if (changed & BSS_CHANGED_ERP_SLOT) {
2166 err = ar9170_set_slot_time(ar);
2171 if (changed & BSS_CHANGED_BASIC_RATES) {
2172 err = ar9170_set_basic_rates(ar);
2178 mutex_unlock(&ar->mutex);
2181 static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
2183 struct ar9170 *ar = hw->priv;
2187 static const u32 addr[NR] = { AR9170_MAC_REG_TSF_H,
2188 AR9170_MAC_REG_TSF_L,
2189 AR9170_MAC_REG_TSF_H };
2193 mutex_lock(&ar->mutex);
2195 while (loops++ < 10) {
2196 err = ar9170_read_mreg(ar, NR, addr, val);
2197 if (err || val[0] == val[2])
2201 mutex_unlock(&ar->mutex);
2206 tsf = (tsf << 32) | val[1];
2211 static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2212 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2213 struct ieee80211_key_conf *key)
2215 struct ar9170 *ar = hw->priv;
2219 if ((!ar->vif) || (ar->disable_offload))
2224 if (key->keylen == WLAN_KEY_LEN_WEP40)
2225 ktype = AR9170_ENC_ALG_WEP64;
2227 ktype = AR9170_ENC_ALG_WEP128;
2230 ktype = AR9170_ENC_ALG_TKIP;
2233 ktype = AR9170_ENC_ALG_AESCCMP;
2239 mutex_lock(&ar->mutex);
2240 if (cmd == SET_KEY) {
2241 if (unlikely(!IS_STARTED(ar))) {
2246 /* group keys need all-zeroes address */
2247 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
2250 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
2251 for (i = 0; i < 64; i++)
2252 if (!(ar->usedkeys & BIT(i)))
2255 ar->rx_software_decryption = true;
2256 ar9170_set_operating_mode(ar);
2261 i = 64 + key->keyidx;
2264 key->hw_key_idx = i;
2266 err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
2267 key->key, min_t(u8, 16, key->keylen));
2271 if (key->alg == ALG_TKIP) {
2272 err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
2273 ktype, 1, key->key + 16, 16);
2278 * hardware is not capable generating the MMIC
2279 * for fragmented frames!
2281 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2285 ar->usedkeys |= BIT(i);
2287 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2289 if (unlikely(!IS_STARTED(ar))) {
2290 /* The device is gone... together with the key ;-) */
2295 err = ar9170_disable_key(ar, key->hw_key_idx);
2299 if (key->hw_key_idx < 64) {
2300 ar->usedkeys &= ~BIT(key->hw_key_idx);
2302 err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
2303 AR9170_ENC_ALG_NONE, 0,
2308 if (key->alg == ALG_TKIP) {
2309 err = ar9170_upload_key(ar, key->hw_key_idx,
2311 AR9170_ENC_ALG_NONE, 1,
2320 ar9170_regwrite_begin(ar);
2321 ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
2322 ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
2323 ar9170_regwrite_finish();
2324 err = ar9170_regwrite_result();
2327 mutex_unlock(&ar->mutex);
2332 static int ar9170_sta_add(struct ieee80211_hw *hw,
2333 struct ieee80211_vif *vif,
2334 struct ieee80211_sta *sta)
2336 struct ar9170 *ar = hw->priv;
2337 struct ar9170_sta_info *sta_info = (void *) sta->drv_priv;
2340 memset(sta_info, 0, sizeof(*sta_info));
2342 if (!sta->ht_cap.ht_supported)
2345 if (sta->ht_cap.ampdu_density > ar->global_ampdu_density)
2346 ar->global_ampdu_density = sta->ht_cap.ampdu_density;
2348 if (sta->ht_cap.ampdu_factor < ar->global_ampdu_factor)
2349 ar->global_ampdu_factor = sta->ht_cap.ampdu_factor;
2351 for (i = 0; i < AR9170_NUM_TID; i++) {
2352 sta_info->agg[i].state = AR9170_TID_STATE_SHUTDOWN;
2353 sta_info->agg[i].active = false;
2354 sta_info->agg[i].ssn = 0;
2355 sta_info->agg[i].tid = i;
2356 INIT_LIST_HEAD(&sta_info->agg[i].list);
2357 skb_queue_head_init(&sta_info->agg[i].queue);
2360 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
2365 static int ar9170_sta_remove(struct ieee80211_hw *hw,
2366 struct ieee80211_vif *vif,
2367 struct ieee80211_sta *sta)
2369 struct ar9170_sta_info *sta_info = (void *) sta->drv_priv;
2372 if (!sta->ht_cap.ht_supported)
2375 for (i = 0; i < AR9170_NUM_TID; i++) {
2376 sta_info->agg[i].state = AR9170_TID_STATE_INVALID;
2377 skb_queue_purge(&sta_info->agg[i].queue);
2383 static int ar9170_get_stats(struct ieee80211_hw *hw,
2384 struct ieee80211_low_level_stats *stats)
2386 struct ar9170 *ar = hw->priv;
2390 mutex_lock(&ar->mutex);
2391 err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
2392 ar->stats.dot11ACKFailureCount += val;
2394 memcpy(stats, &ar->stats, sizeof(*stats));
2395 mutex_unlock(&ar->mutex);
2400 static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
2401 const struct ieee80211_tx_queue_params *param)
2403 struct ar9170 *ar = hw->priv;
2406 mutex_lock(&ar->mutex);
2407 if (queue < __AR9170_NUM_TXQ) {
2408 memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
2409 param, sizeof(*param));
2411 ret = ar9170_set_qos(ar);
2416 mutex_unlock(&ar->mutex);
2420 static int ar9170_ampdu_action(struct ieee80211_hw *hw,
2421 struct ieee80211_vif *vif,
2422 enum ieee80211_ampdu_mlme_action action,
2423 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2425 struct ar9170 *ar = hw->priv;
2426 struct ar9170_sta_info *sta_info = (void *) sta->drv_priv;
2427 struct ar9170_sta_tid *tid_info = &sta_info->agg[tid];
2428 unsigned long flags;
2434 case IEEE80211_AMPDU_TX_START:
2435 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2436 if (tid_info->state != AR9170_TID_STATE_SHUTDOWN ||
2437 !list_empty(&tid_info->list)) {
2438 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2439 #ifdef AR9170_TXAGG_DEBUG
2440 printk(KERN_INFO "%s: A-MPDU [ESS:[%pM] tid:[%d]] "
2441 "is in a very bad state!\n",
2442 wiphy_name(hw->wiphy), sta->addr, tid);
2443 #endif /* AR9170_TXAGG_DEBUG */
2447 *ssn = tid_info->ssn;
2448 tid_info->state = AR9170_TID_STATE_PROGRESS;
2449 tid_info->active = false;
2450 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2451 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2454 case IEEE80211_AMPDU_TX_STOP:
2455 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2456 tid_info->state = AR9170_TID_STATE_SHUTDOWN;
2457 list_del_init(&tid_info->list);
2458 tid_info->active = false;
2459 skb_queue_purge(&tid_info->queue);
2460 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2461 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2464 case IEEE80211_AMPDU_TX_OPERATIONAL:
2465 #ifdef AR9170_TXAGG_DEBUG
2466 printk(KERN_INFO "%s: A-MPDU for %pM [tid:%d] Operational.\n",
2467 wiphy_name(hw->wiphy), sta->addr, tid);
2468 #endif /* AR9170_TXAGG_DEBUG */
2469 spin_lock_irqsave(&ar->tx_ampdu_list_lock, flags);
2470 sta_info->agg[tid].state = AR9170_TID_STATE_COMPLETE;
2471 spin_unlock_irqrestore(&ar->tx_ampdu_list_lock, flags);
2474 case IEEE80211_AMPDU_RX_START:
2475 case IEEE80211_AMPDU_RX_STOP:
2476 /* Handled by firmware */
2486 static const struct ieee80211_ops ar9170_ops = {
2487 .start = ar9170_op_start,
2488 .stop = ar9170_op_stop,
2490 .add_interface = ar9170_op_add_interface,
2491 .remove_interface = ar9170_op_remove_interface,
2492 .config = ar9170_op_config,
2493 .prepare_multicast = ar9170_op_prepare_multicast,
2494 .configure_filter = ar9170_op_configure_filter,
2495 .conf_tx = ar9170_conf_tx,
2496 .bss_info_changed = ar9170_op_bss_info_changed,
2497 .get_tsf = ar9170_op_get_tsf,
2498 .set_key = ar9170_set_key,
2499 .sta_add = ar9170_sta_add,
2500 .sta_remove = ar9170_sta_remove,
2501 .get_stats = ar9170_get_stats,
2502 .ampdu_action = ar9170_ampdu_action,
2505 void *ar9170_alloc(size_t priv_size)
2507 struct ieee80211_hw *hw;
2509 struct sk_buff *skb;
2513 * this buffer is used for rx stream reconstruction.
2514 * Under heavy load this device (or the transport layer?)
2515 * tends to split the streams into seperate rx descriptors.
2518 skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL);
2522 hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
2528 ar->rx_failover = skb;
2530 mutex_init(&ar->mutex);
2531 spin_lock_init(&ar->cmdlock);
2532 spin_lock_init(&ar->tx_stats_lock);
2533 spin_lock_init(&ar->tx_ampdu_list_lock);
2534 skb_queue_head_init(&ar->tx_status_ampdu);
2535 for (i = 0; i < __AR9170_NUM_TXQ; i++) {
2536 skb_queue_head_init(&ar->tx_status[i]);
2537 skb_queue_head_init(&ar->tx_pending[i]);
2539 ar9170_rx_reset_rx_mpdu(ar);
2540 INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
2541 INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
2542 INIT_LIST_HEAD(&ar->tx_ampdu_list);
2544 /* all hw supports 2.4 GHz, so set channel to 1 by default */
2545 ar->channel = &ar9170_2ghz_chantable[0];
2547 /* first part of wiphy init */
2548 ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2549 BIT(NL80211_IFTYPE_WDS) |
2550 BIT(NL80211_IFTYPE_ADHOC);
2551 ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
2552 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2553 IEEE80211_HW_SIGNAL_DBM |
2554 IEEE80211_HW_NOISE_DBM;
2557 ar->hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
2559 ar9170_band_2GHz.ht_cap.ht_supported = false;
2560 ar9170_band_5GHz.ht_cap.ht_supported = false;
2563 ar->hw->queues = __AR9170_NUM_TXQ;
2564 ar->hw->extra_tx_headroom = 8;
2565 ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
2567 ar->hw->max_rates = 1;
2568 ar->hw->max_rate_tries = 3;
2570 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
2571 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
2577 return ERR_PTR(-ENOMEM);
2580 static int ar9170_read_eeprom(struct ar9170 *ar)
2582 #define RW 8 /* number of words to read at once */
2583 #define RB (sizeof(u32) * RW)
2584 struct ath_regulatory *regulatory = &ar->common.regulatory;
2585 u8 *eeprom = (void *)&ar->eeprom;
2586 u8 *addr = ar->eeprom.mac_address;
2588 unsigned int rx_streams, tx_streams, tx_params = 0;
2589 int i, j, err, bands = 0;
2591 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
2593 BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
2595 /* don't want to handle trailing remains */
2596 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
2599 for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
2600 for (j = 0; j < RW; j++)
2601 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
2604 err = ar->exec_cmd(ar, AR9170_CMD_RREG,
2605 RB, (u8 *) &offsets,
2606 RB, eeprom + RB * i);
2614 if (ar->eeprom.length == cpu_to_le16(0xFFFF))
2617 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
2618 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
2621 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
2622 ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
2626 rx_streams = hweight8(ar->eeprom.rx_mask);
2627 tx_streams = hweight8(ar->eeprom.tx_mask);
2629 if (rx_streams != tx_streams)
2630 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
2632 if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS)
2633 tx_params = (tx_streams - 1) <<
2634 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2636 ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
2637 ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
2640 * I measured this, a bandswitch takes roughly
2641 * 135 ms and a frequency switch about 80.
2643 * FIXME: measure these values again once EEPROM settings
2644 * are used, that will influence them!
2647 ar->hw->channel_change_time = 135 * 1000;
2649 ar->hw->channel_change_time = 80 * 1000;
2651 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
2652 regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
2654 /* second part of wiphy init */
2655 SET_IEEE80211_PERM_ADDR(ar->hw, addr);
2657 return bands ? 0 : -EINVAL;
2660 static int ar9170_reg_notifier(struct wiphy *wiphy,
2661 struct regulatory_request *request)
2663 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
2664 struct ar9170 *ar = hw->priv;
2666 return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
2669 int ar9170_register(struct ar9170 *ar, struct device *pdev)
2671 struct ath_regulatory *regulatory = &ar->common.regulatory;
2674 /* try to read EEPROM, init MAC addr */
2675 err = ar9170_read_eeprom(ar);
2679 err = ath_regd_init(regulatory, ar->hw->wiphy,
2680 ar9170_reg_notifier);
2684 err = ieee80211_register_hw(ar->hw);
2688 if (!ath_is_world_regd(regulatory))
2689 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
2691 err = ar9170_init_leds(ar);
2695 #ifdef CONFIG_AR9170_LEDS
2696 err = ar9170_register_leds(ar);
2699 #endif /* CONFIG_AR9170_LEDS */
2701 dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
2702 wiphy_name(ar->hw->wiphy));
2707 ieee80211_unregister_hw(ar->hw);
2713 void ar9170_unregister(struct ar9170 *ar)
2715 #ifdef CONFIG_AR9170_LEDS
2716 ar9170_unregister_leds(ar);
2717 #endif /* CONFIG_AR9170_LEDS */
2719 kfree_skb(ar->rx_failover);
2720 ieee80211_unregister_hw(ar->hw);
2721 mutex_destroy(&ar->mutex);