2
* Atheros AR9170 driver
4
* mac80211 interaction code
6
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2009, Christian Lamparter <chunkeey@web.de>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, see
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* http://www.gnu.org/licenses/.
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* This file incorporates work covered by the following copyright and
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* Copyright (c) 2007-2008 Atheros Communications, Inc.
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
40
#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include <net/mac80211.h>
49
static int modparam_nohwcrypt;
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module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
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MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
53
#define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
54
.bitrate = (_bitrate), \
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.hw_value = (_hw_rate) | (_txpidx) << 4, \
59
static struct ieee80211_rate __ar9170_ratetable[] = {
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RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
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RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
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RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
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#define ar9170_g_ratetable (__ar9170_ratetable + 0)
76
#define ar9170_g_ratetable_size 12
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#define ar9170_a_ratetable (__ar9170_ratetable + 4)
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#define ar9170_a_ratetable_size 8
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* NB: The hw_value is used as an index into the ar9170_phy_freq_params
82
* array in phy.c so that we don't have to do frequency lookups!
84
#define CHAN(_freq, _idx) { \
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.center_freq = (_freq), \
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.max_power = 18, /* XXX */ \
90
static struct ieee80211_channel ar9170_2ghz_chantable[] = {
107
static struct ieee80211_channel ar9170_5ghz_chantable[] = {
146
#define AR9170_HT_CAP \
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.ht_supported = true, \
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.cap = IEEE80211_HT_CAP_MAX_AMSDU | \
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IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
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IEEE80211_HT_CAP_SGI_40 | \
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IEEE80211_HT_CAP_GRN_FLD | \
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IEEE80211_HT_CAP_DSSSCCK40 | \
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IEEE80211_HT_CAP_SM_PS, \
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.ampdu_density = 6, \
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.rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \
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.rx_highest = cpu_to_le16(300), \
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.tx_params = IEEE80211_HT_MCS_TX_DEFINED, \
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static struct ieee80211_supported_band ar9170_band_2GHz = {
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.channels = ar9170_2ghz_chantable,
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.n_channels = ARRAY_SIZE(ar9170_2ghz_chantable),
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.bitrates = ar9170_g_ratetable,
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.n_bitrates = ar9170_g_ratetable_size,
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.ht_cap = AR9170_HT_CAP,
172
static struct ieee80211_supported_band ar9170_band_5GHz = {
173
.channels = ar9170_5ghz_chantable,
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.n_channels = ARRAY_SIZE(ar9170_5ghz_chantable),
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.bitrates = ar9170_a_ratetable,
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.n_bitrates = ar9170_a_ratetable_size,
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.ht_cap = AR9170_HT_CAP,
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static void ar9170_tx(struct ar9170 *ar);
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static inline u16 ar9170_get_seq_h(struct ieee80211_hdr *hdr)
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return le16_to_cpu(hdr->seq_ctrl) >> 4;
187
static inline u16 ar9170_get_seq(struct sk_buff *skb)
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struct ar9170_tx_control *txc = (void *) skb->data;
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return ar9170_get_seq_h((void *) txc->frame_data);
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#ifdef AR9170_QUEUE_DEBUG
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static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
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struct ar9170_tx_control *txc = (void *) skb->data;
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struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
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struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
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struct ieee80211_hdr *hdr = (void *) txc->frame_data;
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wiphy_debug(ar->hw->wiphy,
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"=> FRAME [skb:%p, q:%d, DA:[%pM] s:%d "
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"mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
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skb, skb_get_queue_mapping(skb),
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ieee80211_get_DA(hdr), ar9170_get_seq_h(hdr),
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le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
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jiffies_to_msecs(arinfo->timeout - jiffies));
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static void __ar9170_dump_txqueue(struct ar9170 *ar,
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struct sk_buff_head *queue)
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printk(KERN_DEBUG "---[ cut here ]---\n");
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wiphy_debug(ar->hw->wiphy, "%d entries in queue.\n",
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skb_queue_len(queue));
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skb_queue_walk(queue, skb) {
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printk(KERN_DEBUG "index:%d =>\n", i++);
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ar9170_print_txheader(ar, skb);
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if (i != skb_queue_len(queue))
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printk(KERN_DEBUG "WARNING: queue frame counter "
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"mismatch %d != %d\n", skb_queue_len(queue), i);
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printk(KERN_DEBUG "---[ end ]---\n");
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#endif /* AR9170_QUEUE_DEBUG */
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#ifdef AR9170_QUEUE_DEBUG
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static void ar9170_dump_txqueue(struct ar9170 *ar,
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struct sk_buff_head *queue)
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spin_lock_irqsave(&queue->lock, flags);
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__ar9170_dump_txqueue(ar, queue);
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spin_unlock_irqrestore(&queue->lock, flags);
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#endif /* AR9170_QUEUE_DEBUG */
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#ifdef AR9170_QUEUE_STOP_DEBUG
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static void __ar9170_dump_txstats(struct ar9170 *ar)
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wiphy_debug(ar->hw->wiphy, "QoS queue stats\n");
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for (i = 0; i < __AR9170_NUM_TXQ; i++)
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wiphy_debug(ar->hw->wiphy,
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"queue:%d limit:%d len:%d waitack:%d stopped:%d\n",
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i, ar->tx_stats[i].limit, ar->tx_stats[i].len,
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skb_queue_len(&ar->tx_status[i]),
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ieee80211_queue_stopped(ar->hw, i));
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#endif /* AR9170_QUEUE_STOP_DEBUG */
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/* caller must guarantee exclusive access for _bin_ queue. */
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static void ar9170_recycle_expired(struct ar9170 *ar,
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struct sk_buff_head *queue,
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struct sk_buff_head *bin)
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struct sk_buff *skb, *old = NULL;
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spin_lock_irqsave(&queue->lock, flags);
268
while ((skb = skb_peek(queue))) {
269
struct ieee80211_tx_info *txinfo;
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struct ar9170_tx_info *arinfo;
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txinfo = IEEE80211_SKB_CB(skb);
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arinfo = (void *) txinfo->rate_driver_data;
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if (time_is_before_jiffies(arinfo->timeout)) {
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#ifdef AR9170_QUEUE_DEBUG
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wiphy_debug(ar->hw->wiphy,
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"[%ld > %ld] frame expired => recycle\n",
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jiffies, arinfo->timeout);
280
ar9170_print_txheader(ar, skb);
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#endif /* AR9170_QUEUE_DEBUG */
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__skb_unlink(skb, queue);
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__skb_queue_tail(bin, skb);
288
if (unlikely(old == skb)) {
289
/* bail out - queue is shot. */
296
spin_unlock_irqrestore(&queue->lock, flags);
299
static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
302
struct ieee80211_tx_info *txinfo;
303
unsigned int retries = 0;
305
txinfo = IEEE80211_SKB_CB(skb);
306
ieee80211_tx_info_clear_status(txinfo);
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case AR9170_TX_STATUS_RETRY:
311
case AR9170_TX_STATUS_COMPLETE:
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txinfo->flags |= IEEE80211_TX_STAT_ACK;
315
case AR9170_TX_STATUS_FAILED:
316
retries = ar->hw->conf.long_frame_max_tx_count;
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wiphy_err(ar->hw->wiphy,
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"invalid tx_status response (%x)\n", tx_status);
325
txinfo->status.rates[0].count = retries + 1;
326
skb_pull(skb, sizeof(struct ar9170_tx_control));
327
ieee80211_tx_status_irqsafe(ar->hw, skb);
330
void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
332
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
334
unsigned int queue = skb_get_queue_mapping(skb);
337
spin_lock_irqsave(&ar->tx_stats_lock, flags);
338
ar->tx_stats[queue].len--;
340
if (ar->tx_stats[queue].len < AR9170_NUM_TX_LIMIT_SOFT) {
341
#ifdef AR9170_QUEUE_STOP_DEBUG
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wiphy_debug(ar->hw->wiphy, "wake queue %d\n", queue);
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__ar9170_dump_txstats(ar);
344
#endif /* AR9170_QUEUE_STOP_DEBUG */
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ieee80211_wake_queue(ar->hw, queue);
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spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
349
if (info->flags & IEEE80211_TX_CTL_NO_ACK) {
350
ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
352
arinfo->timeout = jiffies +
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msecs_to_jiffies(AR9170_TX_TIMEOUT);
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skb_queue_tail(&ar->tx_status[queue], skb);
358
if (!ar->tx_stats[queue].len &&
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!skb_queue_empty(&ar->tx_pending[queue])) {
364
static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
366
struct sk_buff_head *queue,
373
* Unfortunately, the firmware does not tell to which (queued) frame
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* this transmission status report belongs to.
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* So we have to make risky guesses - with the scarce information
377
* the firmware provided (-> destination MAC, and phy_control) -
378
* and hope that we picked the right one...
381
spin_lock_irqsave(&queue->lock, flags);
382
skb_queue_walk(queue, skb) {
383
struct ar9170_tx_control *txc = (void *) skb->data;
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struct ieee80211_hdr *hdr = (void *) txc->frame_data;
387
if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
388
#ifdef AR9170_QUEUE_DEBUG
389
wiphy_debug(ar->hw->wiphy,
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"skip frame => DA %pM != %pM\n",
391
mac, ieee80211_get_DA(hdr));
392
ar9170_print_txheader(ar, skb);
393
#endif /* AR9170_QUEUE_DEBUG */
397
r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
398
AR9170_TX_PHY_MCS_SHIFT;
400
if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
401
#ifdef AR9170_QUEUE_DEBUG
402
wiphy_debug(ar->hw->wiphy,
403
"skip frame => rate %d != %d\n", rate, r);
404
ar9170_print_txheader(ar, skb);
405
#endif /* AR9170_QUEUE_DEBUG */
409
__skb_unlink(skb, queue);
410
spin_unlock_irqrestore(&queue->lock, flags);
414
#ifdef AR9170_QUEUE_DEBUG
415
wiphy_err(ar->hw->wiphy,
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"ESS:[%pM] does not have any outstanding frames in queue.\n",
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__ar9170_dump_txqueue(ar, queue);
419
#endif /* AR9170_QUEUE_DEBUG */
420
spin_unlock_irqrestore(&queue->lock, flags);
426
* This worker tries to keeps an maintain tx_status queues.
427
* So we can guarantee that incoming tx_status reports are
428
* actually for a pending frame.
431
static void ar9170_tx_janitor(struct work_struct *work)
433
struct ar9170 *ar = container_of(work, struct ar9170,
435
struct sk_buff_head waste;
437
bool resched = false;
439
if (unlikely(!IS_STARTED(ar)))
442
skb_queue_head_init(&waste);
444
for (i = 0; i < __AR9170_NUM_TXQ; i++) {
445
#ifdef AR9170_QUEUE_DEBUG
446
wiphy_debug(ar->hw->wiphy, "garbage collector scans queue:%d\n",
448
ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
449
ar9170_dump_txqueue(ar, &ar->tx_status[i]);
450
#endif /* AR9170_QUEUE_DEBUG */
452
ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
453
ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
454
skb_queue_purge(&waste);
456
if (!skb_queue_empty(&ar->tx_status[i]) ||
457
!skb_queue_empty(&ar->tx_pending[i]))
464
ieee80211_queue_delayed_work(ar->hw,
466
msecs_to_jiffies(AR9170_JANITOR_DELAY));
469
void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
471
struct ar9170_cmd_response *cmd = (void *) buf;
473
if ((cmd->type & 0xc0) != 0xc0) {
474
ar->callback_cmd(ar, len, buf);
478
/* hardware event handlers */
482
* TX status notification:
483
* bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
487
* M1-M6 is the MAC address
488
* R1-R4 is the transmit rate
489
* S1-S2 is the transmit status
493
u32 phy = le32_to_cpu(cmd->tx_status.rate);
494
u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
495
AR9170_TX_PHY_QOS_SHIFT;
496
#ifdef AR9170_QUEUE_DEBUG
497
wiphy_debug(ar->hw->wiphy,
498
"recv tx_status for %pm, p:%08x, q:%d\n",
499
cmd->tx_status.dst, phy, q);
500
#endif /* AR9170_QUEUE_DEBUG */
502
skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
504
AR9170_TX_INVALID_RATE);
508
ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
516
if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
517
ieee80211_queue_work(ar->hw, &ar->beacon_work);
522
* (IBSS) beacon send notification
523
* bytes: 04 c2 XX YY B4 B3 B2 B1
527
* B1-B4 "should" be the number of send out beacons.
532
/* End of Atim Window */
536
/* BlockACK bitmap */
540
/* BlockACK events */
544
/* Watchdog Interrupt */
548
/* retransmission issue / SIFS/EIFS collision ?! */
553
printk(KERN_DEBUG "ar9170 FW: %.*s\n", len - 4,
561
printk(KERN_DEBUG "ar9170 FW: u8: %#.2x\n",
565
printk(KERN_DEBUG "ar9170 FW: u8: %#.4x\n",
566
le16_to_cpup((__le16 *)((char *)buf + 4)));
569
printk(KERN_DEBUG "ar9170 FW: u8: %#.8x\n",
570
le32_to_cpup((__le32 *)((char *)buf + 4)));
573
printk(KERN_DEBUG "ar9170 FW: u8: %#.16lx\n",
574
(unsigned long)le64_to_cpup(
575
(__le64 *)((char *)buf + 4)));
580
print_hex_dump_bytes("ar9170 FW:", DUMP_PREFIX_NONE,
581
(char *)buf + 4, len - 4);
585
pr_info("received unhandled event %x\n", cmd->type);
586
print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
591
static void ar9170_rx_reset_rx_mpdu(struct ar9170 *ar)
593
memset(&ar->rx_mpdu.plcp, 0, sizeof(struct ar9170_rx_head));
594
ar->rx_mpdu.has_plcp = false;
597
int ar9170_nag_limiter(struct ar9170 *ar)
602
* we expect all sorts of errors in promiscuous mode.
603
* don't bother with it, it's OK!
605
if (ar->sniffer_enabled)
609
* only go for frequent errors! The hardware tends to
610
* do some stupid thing once in a while under load, in
611
* noisy environments or just for fun!
613
if (time_before(jiffies, ar->bad_hw_nagger) && net_ratelimit())
614
print_message = true;
616
print_message = false;
618
/* reset threshold for "once in a while" */
619
ar->bad_hw_nagger = jiffies + HZ / 4;
620
return print_message;
623
static int ar9170_rx_mac_status(struct ar9170 *ar,
624
struct ar9170_rx_head *head,
625
struct ar9170_rx_macstatus *mac,
626
struct ieee80211_rx_status *status)
630
BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
631
BUILD_BUG_ON(sizeof(struct ar9170_rx_macstatus) != 4);
634
if (error & AR9170_RX_ERROR_MMIC) {
635
status->flag |= RX_FLAG_MMIC_ERROR;
636
error &= ~AR9170_RX_ERROR_MMIC;
639
if (error & AR9170_RX_ERROR_PLCP) {
640
status->flag |= RX_FLAG_FAILED_PLCP_CRC;
641
error &= ~AR9170_RX_ERROR_PLCP;
643
if (!(ar->filter_state & FIF_PLCPFAIL))
647
if (error & AR9170_RX_ERROR_FCS) {
648
status->flag |= RX_FLAG_FAILED_FCS_CRC;
649
error &= ~AR9170_RX_ERROR_FCS;
651
if (!(ar->filter_state & FIF_FCSFAIL))
655
decrypt = ar9170_get_decrypt_type(mac);
656
if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
657
decrypt != AR9170_ENC_ALG_NONE)
658
status->flag |= RX_FLAG_DECRYPTED;
660
/* ignore wrong RA errors */
661
error &= ~AR9170_RX_ERROR_WRONG_RA;
663
if (error & AR9170_RX_ERROR_DECRYPT) {
664
error &= ~AR9170_RX_ERROR_DECRYPT;
666
* Rx decryption is done in place,
667
* the original data is lost anyway.
673
/* drop any other error frames */
674
if (unlikely(error)) {
675
/* TODO: update netdevice's RX dropped/errors statistics */
677
if (ar9170_nag_limiter(ar))
678
wiphy_debug(ar->hw->wiphy,
679
"received frame with suspicious error code (%#x).\n",
685
status->band = ar->channel->band;
686
status->freq = ar->channel->center_freq;
688
switch (mac->status & AR9170_RX_STATUS_MODULATION_MASK) {
689
case AR9170_RX_STATUS_MODULATION_CCK:
690
if (mac->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
691
status->flag |= RX_FLAG_SHORTPRE;
692
switch (head->plcp[0]) {
694
status->rate_idx = 0;
697
status->rate_idx = 1;
700
status->rate_idx = 2;
703
status->rate_idx = 3;
706
if (ar9170_nag_limiter(ar))
707
wiphy_err(ar->hw->wiphy,
708
"invalid plcp cck rate (%x).\n",
714
case AR9170_RX_STATUS_MODULATION_DUPOFDM:
715
case AR9170_RX_STATUS_MODULATION_OFDM:
716
switch (head->plcp[0] & 0xf) {
718
status->rate_idx = 0;
721
status->rate_idx = 1;
724
status->rate_idx = 2;
727
status->rate_idx = 3;
730
status->rate_idx = 4;
733
status->rate_idx = 5;
736
status->rate_idx = 6;
739
status->rate_idx = 7;
742
if (ar9170_nag_limiter(ar))
743
wiphy_err(ar->hw->wiphy,
744
"invalid plcp ofdm rate (%x).\n",
748
if (status->band == IEEE80211_BAND_2GHZ)
749
status->rate_idx += 4;
752
case AR9170_RX_STATUS_MODULATION_HT:
753
if (head->plcp[3] & 0x80)
754
status->flag |= RX_FLAG_40MHZ;
755
if (head->plcp[6] & 0x80)
756
status->flag |= RX_FLAG_SHORT_GI;
758
status->rate_idx = clamp(0, 75, head->plcp[6] & 0x7f);
759
status->flag |= RX_FLAG_HT;
763
if (ar9170_nag_limiter(ar))
764
wiphy_err(ar->hw->wiphy, "invalid modulation\n");
771
static void ar9170_rx_phy_status(struct ar9170 *ar,
772
struct ar9170_rx_phystatus *phy,
773
struct ieee80211_rx_status *status)
777
BUILD_BUG_ON(sizeof(struct ar9170_rx_phystatus) != 20);
779
for (i = 0; i < 3; i++)
780
if (phy->rssi[i] != 0x80)
781
status->antenna |= BIT(i);
783
/* post-process RSSI */
784
for (i = 0; i < 7; i++)
785
if (phy->rssi[i] & 0x80)
786
phy->rssi[i] = ((phy->rssi[i] & 0x7f) + 1) & 0x7f;
788
/* TODO: we could do something with phy_errors */
789
status->signal = ar->noise[0] + phy->rssi_combined;
792
static struct sk_buff *ar9170_rx_copy_data(u8 *buf, int len)
796
struct ieee80211_hdr *hdr = (void *) buf;
798
if (ieee80211_is_data_qos(hdr->frame_control)) {
799
u8 *qc = ieee80211_get_qos_ctl(hdr);
800
reserved += NET_IP_ALIGN;
802
if (*qc & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)
803
reserved += NET_IP_ALIGN;
806
if (ieee80211_has_a4(hdr->frame_control))
807
reserved += NET_IP_ALIGN;
809
reserved = 32 + (reserved & NET_IP_ALIGN);
811
skb = dev_alloc_skb(len + reserved);
813
skb_reserve(skb, reserved);
814
memcpy(skb_put(skb, len), buf, len);
821
* If the frame alignment is right (or the kernel has
822
* CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
823
* is only a single MPDU in the USB frame, then we could
824
* submit to mac80211 the SKB directly. However, since
825
* there may be multiple packets in one SKB in stream
826
* mode, and we need to observe the proper ordering,
827
* this is non-trivial.
830
static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
832
struct ar9170_rx_head *head;
833
struct ar9170_rx_macstatus *mac;
834
struct ar9170_rx_phystatus *phy = NULL;
835
struct ieee80211_rx_status status;
839
if (unlikely(!IS_STARTED(ar) || len < (sizeof(*mac))))
843
mpdu_len = len - sizeof(*mac);
845
mac = (void *)(buf + mpdu_len);
846
if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) {
847
/* this frame is too damaged and can't be used - drop it */
852
switch (mac->status & AR9170_RX_STATUS_MPDU_MASK) {
853
case AR9170_RX_STATUS_MPDU_FIRST:
854
/* first mpdu packet has the plcp header */
855
if (likely(mpdu_len >= sizeof(struct ar9170_rx_head))) {
857
memcpy(&ar->rx_mpdu.plcp, (void *) buf,
858
sizeof(struct ar9170_rx_head));
860
mpdu_len -= sizeof(struct ar9170_rx_head);
861
buf += sizeof(struct ar9170_rx_head);
862
ar->rx_mpdu.has_plcp = true;
864
if (ar9170_nag_limiter(ar))
865
wiphy_err(ar->hw->wiphy,
866
"plcp info is clipped.\n");
871
case AR9170_RX_STATUS_MPDU_LAST:
872
/* last mpdu has a extra tail with phy status information */
874
if (likely(mpdu_len >= sizeof(struct ar9170_rx_phystatus))) {
875
mpdu_len -= sizeof(struct ar9170_rx_phystatus);
876
phy = (void *)(buf + mpdu_len);
878
if (ar9170_nag_limiter(ar))
879
wiphy_err(ar->hw->wiphy,
880
"frame tail is clipped.\n");
884
case AR9170_RX_STATUS_MPDU_MIDDLE:
885
/* middle mpdus are just data */
886
if (unlikely(!ar->rx_mpdu.has_plcp)) {
887
if (!ar9170_nag_limiter(ar))
890
wiphy_err(ar->hw->wiphy,
891
"rx stream did not start with a first_mpdu frame tag.\n");
896
head = &ar->rx_mpdu.plcp;
899
case AR9170_RX_STATUS_MPDU_SINGLE:
900
/* single mpdu - has plcp (head) and phy status (tail) */
903
mpdu_len -= sizeof(struct ar9170_rx_head);
904
mpdu_len -= sizeof(struct ar9170_rx_phystatus);
906
buf += sizeof(struct ar9170_rx_head);
907
phy = (void *)(buf + mpdu_len);
915
if (unlikely(mpdu_len < FCS_LEN))
918
memset(&status, 0, sizeof(status));
919
if (unlikely(ar9170_rx_mac_status(ar, head, mac, &status)))
923
ar9170_rx_phy_status(ar, phy, &status);
925
skb = ar9170_rx_copy_data(buf, mpdu_len);
927
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
928
ieee80211_rx_irqsafe(ar->hw, skb);
932
void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
934
unsigned int i, tlen, resplen, wlen = 0, clen = 0;
941
clen = tbuf[1] << 8 | tbuf[0];
942
wlen = ALIGN(clen, 4);
944
/* check if this is stream has a valid tag.*/
945
if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
947
* TODO: handle the highly unlikely event that the
948
* corrupted stream has the TAG at the right position.
951
/* check if the frame can be repaired. */
952
if (!ar->rx_failover_missing) {
953
/* this is no "short read". */
954
if (ar9170_nag_limiter(ar)) {
955
wiphy_err(ar->hw->wiphy,
962
if (ar->rx_failover_missing > tlen) {
963
if (ar9170_nag_limiter(ar)) {
964
wiphy_err(ar->hw->wiphy,
965
"possible multi stream corruption!\n");
971
memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
972
ar->rx_failover_missing -= tlen;
974
if (ar->rx_failover_missing <= 0) {
976
* nested ar9170_rx call!
977
* termination is guaranteed, even when the
978
* combined frame also have a element with
982
ar->rx_failover_missing = 0;
983
ar9170_rx(ar, ar->rx_failover);
985
skb_reset_tail_pointer(ar->rx_failover);
986
skb_trim(ar->rx_failover, 0);
992
/* check if stream is clipped */
993
if (wlen > tlen - 4) {
994
if (ar->rx_failover_missing) {
995
/* TODO: handle double stream corruption. */
996
if (ar9170_nag_limiter(ar)) {
997
wiphy_err(ar->hw->wiphy,
998
"double rx stream corruption!\n");
1005
* save incomplete data set.
1006
* the firmware will resend the missing bits when
1007
* the rx - descriptor comes round again.
1010
memcpy(skb_put(ar->rx_failover, tlen), tbuf, tlen);
1011
ar->rx_failover_missing = clen - tlen;
1021
/* weird thing, but this is the same in the original driver */
1022
while (resplen > 2 && i < 12 &&
1023
respbuf[0] == 0xff && respbuf[1] == 0xff) {
1032
/* found the 6 * 0xffff marker? */
1034
ar9170_handle_command_response(ar, respbuf, resplen);
1036
ar9170_handle_mpdu(ar, respbuf, clen);
1040
if (net_ratelimit())
1041
wiphy_err(ar->hw->wiphy,
1042
"%d bytes of unprocessed data left in rx stream!\n",
1051
wiphy_err(ar->hw->wiphy,
1052
"damaged RX stream data [want:%d, data:%d, rx:%d, pending:%d ]\n",
1053
clen, wlen, tlen, ar->rx_failover_missing);
1055
if (ar->rx_failover_missing)
1056
print_hex_dump_bytes("rxbuf:", DUMP_PREFIX_OFFSET,
1057
ar->rx_failover->data,
1058
ar->rx_failover->len);
1060
print_hex_dump_bytes("stream:", DUMP_PREFIX_OFFSET,
1061
skb->data, skb->len);
1063
wiphy_err(ar->hw->wiphy,
1064
"If you see this message frequently, please check your hardware and cables.\n");
1067
if (ar->rx_failover_missing) {
1068
skb_reset_tail_pointer(ar->rx_failover);
1069
skb_trim(ar->rx_failover, 0);
1070
ar->rx_failover_missing = 0;
1074
#define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
1076
queue.aifs = ai_fs; \
1077
queue.cw_min = cwmin; \
1078
queue.cw_max = cwmax; \
1079
queue.txop = _txop; \
1082
static int ar9170_op_start(struct ieee80211_hw *hw)
1084
struct ar9170 *ar = hw->priv;
1087
mutex_lock(&ar->mutex);
1089
/* reinitialize queues statistics */
1090
memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
1091
for (i = 0; i < __AR9170_NUM_TXQ; i++)
1092
ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
1094
/* reset QoS defaults */
1095
AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
1096
AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */
1097
AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */
1098
AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */
1099
AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
1101
/* set sane AMPDU defaults */
1102
ar->global_ampdu_density = 6;
1103
ar->global_ampdu_factor = 3;
1105
ar->bad_hw_nagger = jiffies;
1111
err = ar9170_init_mac(ar);
1115
err = ar9170_set_qos(ar);
1119
err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
1123
err = ar9170_init_rf(ar);
1128
err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
1132
ar->state = AR9170_STARTED;
1135
mutex_unlock(&ar->mutex);
1139
static void ar9170_op_stop(struct ieee80211_hw *hw)
1141
struct ar9170 *ar = hw->priv;
1145
ar->state = AR9170_IDLE;
1147
cancel_delayed_work_sync(&ar->tx_janitor);
1148
#ifdef CONFIG_AR9170_LEDS
1149
cancel_delayed_work_sync(&ar->led_work);
1151
cancel_work_sync(&ar->beacon_work);
1153
mutex_lock(&ar->mutex);
1155
if (IS_ACCEPTING_CMD(ar)) {
1156
ar9170_set_leds_state(ar, 0);
1159
ar9170_write_reg(ar, 0x1c3d30, 0);
1163
for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1164
skb_queue_purge(&ar->tx_pending[i]);
1165
skb_queue_purge(&ar->tx_status[i]);
1168
mutex_unlock(&ar->mutex);
1171
static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
1173
struct ieee80211_hdr *hdr;
1174
struct ar9170_tx_control *txc;
1175
struct ieee80211_tx_info *info;
1176
struct ieee80211_tx_rate *txrate;
1177
struct ar9170_tx_info *arinfo;
1178
unsigned int queue = skb_get_queue_mapping(skb);
1182
BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1184
hdr = (void *)skb->data;
1185
info = IEEE80211_SKB_CB(skb);
1188
txc = (void *)skb_push(skb, sizeof(*txc));
1190
if (info->control.hw_key) {
1191
icv = info->control.hw_key->icv_len;
1193
switch (info->control.hw_key->cipher) {
1194
case WLAN_CIPHER_SUITE_WEP40:
1195
case WLAN_CIPHER_SUITE_WEP104:
1196
case WLAN_CIPHER_SUITE_TKIP:
1197
keytype = AR9170_TX_MAC_ENCR_RC4;
1199
case WLAN_CIPHER_SUITE_CCMP:
1200
keytype = AR9170_TX_MAC_ENCR_AES;
1209
txc->length = cpu_to_le16(len + icv + 4);
1211
txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
1212
AR9170_TX_MAC_BACKOFF);
1213
txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
1214
AR9170_TX_MAC_QOS_SHIFT);
1215
txc->mac_control |= cpu_to_le16(keytype);
1216
txc->phy_control = cpu_to_le32(0);
1218
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1219
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
1221
txrate = &info->control.rates[0];
1222
if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1223
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
1224
else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1225
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
1227
arinfo = (void *)info->rate_driver_data;
1228
arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
1230
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
1231
(is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
1234
* Putting the QoS queue bits into an unexplored territory is
1235
* certainly not elegant.
1237
* In my defense: This idea provides a reasonable way to
1238
* smuggle valuable information to the tx_status callback.
1239
* Also, the idea behind this bit-abuse came straight from
1240
* the original driver code.
1244
cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
1246
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
1252
skb_pull(skb, sizeof(*txc));
1256
static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
1258
struct ar9170_tx_control *txc;
1259
struct ieee80211_tx_info *info;
1260
struct ieee80211_rate *rate = NULL;
1261
struct ieee80211_tx_rate *txrate;
1264
txc = (void *) skb->data;
1265
info = IEEE80211_SKB_CB(skb);
1266
txrate = &info->control.rates[0];
1268
if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1269
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
1271
if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1272
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
1274
if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1275
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
1276
/* this works because 40 MHz is 2 and dup is 3 */
1277
if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
1278
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
1280
if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
1281
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
1283
if (txrate->flags & IEEE80211_TX_RC_MCS) {
1284
u32 r = txrate->idx;
1287
/* heavy clip control */
1288
txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
1290
r <<= AR9170_TX_PHY_MCS_SHIFT;
1291
BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
1293
txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
1294
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
1296
if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
1297
if (info->band == IEEE80211_BAND_5GHZ)
1298
txpower = ar->power_5G_ht40;
1300
txpower = ar->power_2G_ht40;
1302
if (info->band == IEEE80211_BAND_5GHZ)
1303
txpower = ar->power_5G_ht20;
1305
txpower = ar->power_2G_ht20;
1308
power = txpower[(txrate->idx) & 7];
1313
u8 idx = txrate->idx;
1315
if (info->band != IEEE80211_BAND_2GHZ) {
1317
txpower = ar->power_5G_leg;
1318
mod = AR9170_TX_PHY_MOD_OFDM;
1321
txpower = ar->power_2G_cck;
1322
mod = AR9170_TX_PHY_MOD_CCK;
1324
mod = AR9170_TX_PHY_MOD_OFDM;
1325
txpower = ar->power_2G_ofdm;
1329
rate = &__ar9170_ratetable[idx];
1331
phyrate = rate->hw_value & 0xF;
1332
power = txpower[(rate->hw_value & 0x30) >> 4];
1333
phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
1335
txc->phy_control |= cpu_to_le32(mod);
1336
txc->phy_control |= cpu_to_le32(phyrate);
1339
power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
1340
power &= AR9170_TX_PHY_TX_PWR_MASK;
1341
txc->phy_control |= cpu_to_le32(power);
1344
if (ar->eeprom.tx_mask == 1) {
1345
chains = AR9170_TX_PHY_TXCHAIN_1;
1347
chains = AR9170_TX_PHY_TXCHAIN_2;
1349
/* >= 36M legacy OFDM - use only one chain */
1350
if (rate && rate->bitrate >= 360)
1351
chains = AR9170_TX_PHY_TXCHAIN_1;
1353
txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
1356
static void ar9170_tx(struct ar9170 *ar)
1358
struct sk_buff *skb;
1359
unsigned long flags;
1360
struct ieee80211_tx_info *info;
1361
struct ar9170_tx_info *arinfo;
1362
unsigned int i, frames, frames_failed, remaining_space;
1364
bool schedule_garbagecollector = false;
1366
BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
1368
if (unlikely(!IS_STARTED(ar)))
1371
remaining_space = AR9170_TX_MAX_PENDING;
1373
for (i = 0; i < __AR9170_NUM_TXQ; i++) {
1374
spin_lock_irqsave(&ar->tx_stats_lock, flags);
1375
frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
1376
skb_queue_len(&ar->tx_pending[i]));
1378
if (remaining_space < frames) {
1379
#ifdef AR9170_QUEUE_DEBUG
1380
wiphy_debug(ar->hw->wiphy,
1381
"tx quota reached queue:%d, "
1382
"remaining slots:%d, needed:%d\n",
1383
i, remaining_space, frames);
1384
#endif /* AR9170_QUEUE_DEBUG */
1385
frames = remaining_space;
1388
ar->tx_stats[i].len += frames;
1389
ar->tx_stats[i].count += frames;
1390
if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
1391
#ifdef AR9170_QUEUE_DEBUG
1392
wiphy_debug(ar->hw->wiphy, "queue %d full\n", i);
1393
wiphy_debug(ar->hw->wiphy, "stuck frames: ===>\n");
1394
ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1395
ar9170_dump_txqueue(ar, &ar->tx_status[i]);
1396
#endif /* AR9170_QUEUE_DEBUG */
1398
#ifdef AR9170_QUEUE_STOP_DEBUG
1399
wiphy_debug(ar->hw->wiphy, "stop queue %d\n", i);
1400
__ar9170_dump_txstats(ar);
1401
#endif /* AR9170_QUEUE_STOP_DEBUG */
1402
ieee80211_stop_queue(ar->hw, i);
1405
spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1412
skb = skb_dequeue(&ar->tx_pending[i]);
1413
if (unlikely(!skb)) {
1414
frames_failed += frames;
1419
info = IEEE80211_SKB_CB(skb);
1420
arinfo = (void *) info->rate_driver_data;
1422
/* TODO: cancel stuck frames */
1423
arinfo->timeout = jiffies +
1424
msecs_to_jiffies(AR9170_TX_TIMEOUT);
1426
#ifdef AR9170_QUEUE_DEBUG
1427
wiphy_debug(ar->hw->wiphy, "send frame q:%d =>\n", i);
1428
ar9170_print_txheader(ar, skb);
1429
#endif /* AR9170_QUEUE_DEBUG */
1431
err = ar->tx(ar, skb);
1432
if (unlikely(err)) {
1434
dev_kfree_skb_any(skb);
1437
schedule_garbagecollector = true;
1443
#ifdef AR9170_QUEUE_DEBUG
1444
wiphy_debug(ar->hw->wiphy,
1445
"ar9170_tx report for queue %d\n", i);
1447
wiphy_debug(ar->hw->wiphy,
1448
"unprocessed pending frames left:\n");
1449
ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
1450
#endif /* AR9170_QUEUE_DEBUG */
1452
if (unlikely(frames_failed)) {
1453
#ifdef AR9170_QUEUE_DEBUG
1454
wiphy_debug(ar->hw->wiphy,
1455
"frames failed %d =>\n", frames_failed);
1456
#endif /* AR9170_QUEUE_DEBUG */
1458
spin_lock_irqsave(&ar->tx_stats_lock, flags);
1459
ar->tx_stats[i].len -= frames_failed;
1460
ar->tx_stats[i].count -= frames_failed;
1461
#ifdef AR9170_QUEUE_STOP_DEBUG
1462
wiphy_debug(ar->hw->wiphy, "wake queue %d\n", i);
1463
__ar9170_dump_txstats(ar);
1464
#endif /* AR9170_QUEUE_STOP_DEBUG */
1465
ieee80211_wake_queue(ar->hw, i);
1466
spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
1470
if (!schedule_garbagecollector)
1473
ieee80211_queue_delayed_work(ar->hw,
1475
msecs_to_jiffies(AR9170_JANITOR_DELAY));
1478
void ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
1480
struct ar9170 *ar = hw->priv;
1481
struct ieee80211_tx_info *info;
1484
if (unlikely(!IS_STARTED(ar)))
1487
if (unlikely(ar9170_tx_prepare(ar, skb)))
1490
queue = skb_get_queue_mapping(skb);
1491
info = IEEE80211_SKB_CB(skb);
1492
ar9170_tx_prepare_phy(ar, skb);
1493
skb_queue_tail(&ar->tx_pending[queue], skb);
1499
dev_kfree_skb_any(skb);
1502
static int ar9170_op_add_interface(struct ieee80211_hw *hw,
1503
struct ieee80211_vif *vif)
1505
struct ar9170 *ar = hw->priv;
1506
struct ath_common *common = &ar->common;
1509
mutex_lock(&ar->mutex);
1517
memcpy(common->macaddr, vif->addr, ETH_ALEN);
1519
if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
1520
ar->rx_software_decryption = true;
1521
ar->disable_offload = true;
1525
err = ar9170_update_frame_filter(ar, AR9170_MAC_REG_FTF_DEFAULTS);
1529
err = ar9170_set_operating_mode(ar);
1532
mutex_unlock(&ar->mutex);
1536
static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
1537
struct ieee80211_vif *vif)
1539
struct ar9170 *ar = hw->priv;
1541
mutex_lock(&ar->mutex);
1543
ar9170_update_frame_filter(ar, 0);
1544
ar9170_set_beacon_timers(ar);
1545
dev_kfree_skb(ar->beacon);
1547
ar->sniffer_enabled = false;
1548
ar->rx_software_decryption = false;
1549
ar9170_set_operating_mode(ar);
1550
mutex_unlock(&ar->mutex);
1553
static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
1555
struct ar9170 *ar = hw->priv;
1558
mutex_lock(&ar->mutex);
1560
if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
1565
if (changed & IEEE80211_CONF_CHANGE_PS) {
1570
if (changed & IEEE80211_CONF_CHANGE_POWER) {
1575
if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
1577
* is it long_frame_max_tx_count or short_frame_max_tx_count?
1580
err = ar9170_set_hwretry_limit(ar,
1581
ar->hw->conf.long_frame_max_tx_count);
1586
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1588
/* adjust slot time for 5 GHz */
1589
err = ar9170_set_slot_time(ar);
1593
err = ar9170_set_dyn_sifs_ack(ar);
1597
err = ar9170_set_channel(ar, hw->conf.channel,
1599
nl80211_to_ar9170(hw->conf.channel_type));
1605
mutex_unlock(&ar->mutex);
1609
static u64 ar9170_op_prepare_multicast(struct ieee80211_hw *hw,
1610
struct netdev_hw_addr_list *mc_list)
1613
struct netdev_hw_addr *ha;
1615
/* always get broadcast frames */
1616
mchash = 1ULL << (0xff >> 2);
1618
netdev_hw_addr_list_for_each(ha, mc_list)
1619
mchash |= 1ULL << (ha->addr[5] >> 2);
1624
static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
1625
unsigned int changed_flags,
1626
unsigned int *new_flags,
1629
struct ar9170 *ar = hw->priv;
1631
if (unlikely(!IS_ACCEPTING_CMD(ar)))
1634
mutex_lock(&ar->mutex);
1636
/* mask supported flags */
1637
*new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
1638
FIF_PROMISC_IN_BSS | FIF_FCSFAIL | FIF_PLCPFAIL;
1639
ar->filter_state = *new_flags;
1641
* We can support more by setting the sniffer bit and
1642
* then checking the error flags, later.
1645
if (changed_flags & FIF_ALLMULTI && *new_flags & FIF_ALLMULTI)
1648
if (multicast != ar->cur_mc_hash)
1649
ar9170_update_multicast(ar, multicast);
1651
if (changed_flags & FIF_CONTROL) {
1652
u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
1653
AR9170_MAC_REG_FTF_RTS |
1654
AR9170_MAC_REG_FTF_CTS |
1655
AR9170_MAC_REG_FTF_ACK |
1656
AR9170_MAC_REG_FTF_CFE |
1657
AR9170_MAC_REG_FTF_CFE_ACK;
1659
if (*new_flags & FIF_CONTROL)
1660
filter |= ar->cur_filter;
1662
filter &= (~ar->cur_filter);
1664
ar9170_update_frame_filter(ar, filter);
1667
if (changed_flags & FIF_PROMISC_IN_BSS) {
1668
ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
1669
ar9170_set_operating_mode(ar);
1672
mutex_unlock(&ar->mutex);
1676
static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
1677
struct ieee80211_vif *vif,
1678
struct ieee80211_bss_conf *bss_conf,
1681
struct ar9170 *ar = hw->priv;
1682
struct ath_common *common = &ar->common;
1685
mutex_lock(&ar->mutex);
1687
if (changed & BSS_CHANGED_BSSID) {
1688
memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1689
err = ar9170_set_operating_mode(ar);
1694
if (changed & BSS_CHANGED_BEACON_ENABLED)
1695
ar->enable_beacon = bss_conf->enable_beacon;
1697
if (changed & BSS_CHANGED_BEACON) {
1698
err = ar9170_update_beacon(ar);
1703
if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
1704
BSS_CHANGED_BEACON_INT)) {
1705
err = ar9170_set_beacon_timers(ar);
1710
if (changed & BSS_CHANGED_ASSOC) {
1711
#ifndef CONFIG_AR9170_LEDS
1712
/* enable assoc LED. */
1713
err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
1714
#endif /* CONFIG_AR9170_LEDS */
1717
if (changed & BSS_CHANGED_HT) {
1722
if (changed & BSS_CHANGED_ERP_SLOT) {
1723
err = ar9170_set_slot_time(ar);
1728
if (changed & BSS_CHANGED_BASIC_RATES) {
1729
err = ar9170_set_basic_rates(ar);
1735
mutex_unlock(&ar->mutex);
1738
static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
1740
struct ar9170 *ar = hw->priv;
1744
static const u32 addr[NR] = { AR9170_MAC_REG_TSF_H,
1745
AR9170_MAC_REG_TSF_L,
1746
AR9170_MAC_REG_TSF_H };
1750
mutex_lock(&ar->mutex);
1752
while (loops++ < 10) {
1753
err = ar9170_read_mreg(ar, NR, addr, val);
1754
if (err || val[0] == val[2])
1758
mutex_unlock(&ar->mutex);
1763
tsf = (tsf << 32) | val[1];
1768
static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1769
struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1770
struct ieee80211_key_conf *key)
1772
struct ar9170 *ar = hw->priv;
1776
if ((!ar->vif) || (ar->disable_offload))
1779
switch (key->cipher) {
1780
case WLAN_CIPHER_SUITE_WEP40:
1781
ktype = AR9170_ENC_ALG_WEP64;
1783
case WLAN_CIPHER_SUITE_WEP104:
1784
ktype = AR9170_ENC_ALG_WEP128;
1786
case WLAN_CIPHER_SUITE_TKIP:
1787
ktype = AR9170_ENC_ALG_TKIP;
1789
case WLAN_CIPHER_SUITE_CCMP:
1790
ktype = AR9170_ENC_ALG_AESCCMP;
1796
mutex_lock(&ar->mutex);
1797
if (cmd == SET_KEY) {
1798
if (unlikely(!IS_STARTED(ar))) {
1803
/* group keys need all-zeroes address */
1804
if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1807
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
1808
for (i = 0; i < 64; i++)
1809
if (!(ar->usedkeys & BIT(i)))
1812
ar->rx_software_decryption = true;
1813
ar9170_set_operating_mode(ar);
1818
i = 64 + key->keyidx;
1821
key->hw_key_idx = i;
1823
err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
1824
key->key, min_t(u8, 16, key->keylen));
1828
if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1829
err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
1830
ktype, 1, key->key + 16, 16);
1835
* hardware is not capable generating the MMIC
1836
* for fragmented frames!
1838
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1842
ar->usedkeys |= BIT(i);
1844
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1846
if (unlikely(!IS_STARTED(ar))) {
1847
/* The device is gone... together with the key ;-) */
1852
err = ar9170_disable_key(ar, key->hw_key_idx);
1856
if (key->hw_key_idx < 64) {
1857
ar->usedkeys &= ~BIT(key->hw_key_idx);
1859
err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
1860
AR9170_ENC_ALG_NONE, 0,
1865
if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1866
err = ar9170_upload_key(ar, key->hw_key_idx,
1868
AR9170_ENC_ALG_NONE, 1,
1877
ar9170_regwrite_begin(ar);
1878
ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
1879
ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
1880
ar9170_regwrite_finish();
1881
err = ar9170_regwrite_result();
1884
mutex_unlock(&ar->mutex);
1889
static int ar9170_get_stats(struct ieee80211_hw *hw,
1890
struct ieee80211_low_level_stats *stats)
1892
struct ar9170 *ar = hw->priv;
1896
mutex_lock(&ar->mutex);
1897
err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
1898
ar->stats.dot11ACKFailureCount += val;
1900
memcpy(stats, &ar->stats, sizeof(*stats));
1901
mutex_unlock(&ar->mutex);
1906
static int ar9170_get_survey(struct ieee80211_hw *hw, int idx,
1907
struct survey_info *survey)
1909
struct ar9170 *ar = hw->priv;
1910
struct ieee80211_conf *conf = &hw->conf;
1915
/* TODO: update noise value, e.g. call ar9170_set_channel */
1917
survey->channel = conf->channel;
1918
survey->filled = SURVEY_INFO_NOISE_DBM;
1919
survey->noise = ar->noise[0];
1924
static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
1925
const struct ieee80211_tx_queue_params *param)
1927
struct ar9170 *ar = hw->priv;
1930
mutex_lock(&ar->mutex);
1931
if (queue < __AR9170_NUM_TXQ) {
1932
memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
1933
param, sizeof(*param));
1935
ret = ar9170_set_qos(ar);
1940
mutex_unlock(&ar->mutex);
1944
static int ar9170_ampdu_action(struct ieee80211_hw *hw,
1945
struct ieee80211_vif *vif,
1946
enum ieee80211_ampdu_mlme_action action,
1947
struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1951
case IEEE80211_AMPDU_RX_START:
1952
case IEEE80211_AMPDU_RX_STOP:
1953
/* Handled by firmware */
1963
static const struct ieee80211_ops ar9170_ops = {
1964
.start = ar9170_op_start,
1965
.stop = ar9170_op_stop,
1967
.add_interface = ar9170_op_add_interface,
1968
.remove_interface = ar9170_op_remove_interface,
1969
.config = ar9170_op_config,
1970
.prepare_multicast = ar9170_op_prepare_multicast,
1971
.configure_filter = ar9170_op_configure_filter,
1972
.conf_tx = ar9170_conf_tx,
1973
.bss_info_changed = ar9170_op_bss_info_changed,
1974
.get_tsf = ar9170_op_get_tsf,
1975
.set_key = ar9170_set_key,
1976
.get_stats = ar9170_get_stats,
1977
.get_survey = ar9170_get_survey,
1978
.ampdu_action = ar9170_ampdu_action,
1981
void *ar9170_alloc(size_t priv_size)
1983
struct ieee80211_hw *hw;
1985
struct sk_buff *skb;
1989
* this buffer is used for rx stream reconstruction.
1990
* Under heavy load this device (or the transport layer?)
1991
* tends to split the streams into separate rx descriptors.
1994
skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1998
hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
2004
ar->rx_failover = skb;
2006
mutex_init(&ar->mutex);
2007
spin_lock_init(&ar->cmdlock);
2008
spin_lock_init(&ar->tx_stats_lock);
2009
for (i = 0; i < __AR9170_NUM_TXQ; i++) {
2010
skb_queue_head_init(&ar->tx_status[i]);
2011
skb_queue_head_init(&ar->tx_pending[i]);
2013
ar9170_rx_reset_rx_mpdu(ar);
2014
INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
2015
INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
2017
/* all hw supports 2.4 GHz, so set channel to 1 by default */
2018
ar->channel = &ar9170_2ghz_chantable[0];
2020
/* first part of wiphy init */
2021
ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2022
BIT(NL80211_IFTYPE_WDS) |
2023
BIT(NL80211_IFTYPE_ADHOC);
2024
ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
2025
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2026
IEEE80211_HW_SIGNAL_DBM;
2028
ar->hw->queues = __AR9170_NUM_TXQ;
2029
ar->hw->extra_tx_headroom = 8;
2031
ar->hw->max_rates = 1;
2032
ar->hw->max_rate_tries = 3;
2034
for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
2035
ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
2041
return ERR_PTR(-ENOMEM);
2044
static int ar9170_read_eeprom(struct ar9170 *ar)
2046
#define RW 8 /* number of words to read at once */
2047
#define RB (sizeof(u32) * RW)
2048
struct ath_regulatory *regulatory = &ar->common.regulatory;
2049
u8 *eeprom = (void *)&ar->eeprom;
2050
u8 *addr = ar->eeprom.mac_address;
2052
unsigned int rx_streams, tx_streams, tx_params = 0;
2053
int i, j, err, bands = 0;
2055
BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
2057
BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
2059
/* don't want to handle trailing remains */
2060
BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
2063
for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
2064
for (j = 0; j < RW; j++)
2065
offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
2068
err = ar->exec_cmd(ar, AR9170_CMD_RREG,
2069
RB, (u8 *) &offsets,
2070
RB, eeprom + RB * i);
2078
if (ar->eeprom.length == cpu_to_le16(0xFFFF))
2081
if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
2082
ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
2085
if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
2086
ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
2090
rx_streams = hweight8(ar->eeprom.rx_mask);
2091
tx_streams = hweight8(ar->eeprom.tx_mask);
2093
if (rx_streams != tx_streams)
2094
tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
2096
if (tx_streams >= 1 && tx_streams <= IEEE80211_HT_MCS_TX_MAX_STREAMS)
2097
tx_params = (tx_streams - 1) <<
2098
IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2100
ar9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
2101
ar9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
2104
* I measured this, a bandswitch takes roughly
2105
* 135 ms and a frequency switch about 80.
2107
* FIXME: measure these values again once EEPROM settings
2108
* are used, that will influence them!
2111
ar->hw->channel_change_time = 135 * 1000;
2113
ar->hw->channel_change_time = 80 * 1000;
2115
regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
2116
regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
2118
/* second part of wiphy init */
2119
SET_IEEE80211_PERM_ADDR(ar->hw, addr);
2121
return bands ? 0 : -EINVAL;
2124
static int ar9170_reg_notifier(struct wiphy *wiphy,
2125
struct regulatory_request *request)
2127
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
2128
struct ar9170 *ar = hw->priv;
2130
return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
2133
int ar9170_register(struct ar9170 *ar, struct device *pdev)
2135
struct ath_regulatory *regulatory = &ar->common.regulatory;
2138
/* try to read EEPROM, init MAC addr */
2139
err = ar9170_read_eeprom(ar);
2143
err = ath_regd_init(regulatory, ar->hw->wiphy,
2144
ar9170_reg_notifier);
2148
err = ieee80211_register_hw(ar->hw);
2152
if (!ath_is_world_regd(regulatory))
2153
regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
2155
err = ar9170_init_leds(ar);
2159
#ifdef CONFIG_AR9170_LEDS
2160
err = ar9170_register_leds(ar);
2163
#endif /* CONFIG_AR9170_LEDS */
2165
dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
2166
wiphy_name(ar->hw->wiphy));
2168
ar->registered = true;
2172
ieee80211_unregister_hw(ar->hw);
2178
void ar9170_unregister(struct ar9170 *ar)
2180
if (ar->registered) {
2181
#ifdef CONFIG_AR9170_LEDS
2182
ar9170_unregister_leds(ar);
2183
#endif /* CONFIG_AR9170_LEDS */
2185
ieee80211_unregister_hw(ar->hw);
2188
kfree_skb(ar->rx_failover);
2189
mutex_destroy(&ar->mutex);
added
removed
drivers/net/wireless/ath/ar9170/main.c
