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/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "mt76x2.h"
#include "mt76x2_dma.h"
struct beacon_bc_data {
struct mt76x2_dev *dev;
struct sk_buff_head q;
struct sk_buff *tail[8];
};
int mt76x2_tx_prepare_skb(struct mt76_dev *mdev, void *txwi,
struct sk_buff *skb, struct mt76_queue *q,
struct mt76_wcid *wcid, struct ieee80211_sta *sta,
u32 *tx_info)
{
struct mt76x2_dev *dev = container_of(mdev, struct mt76x2_dev, mt76);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
int qsel = MT_QSEL_EDCA;
int ret;
if (q == &dev->mt76.q_tx[MT_TXQ_PSD] && wcid && wcid->idx < 128)
mt76x2_mac_wcid_set_drop(dev, wcid->idx, false);
mt76x2_mac_write_txwi(dev, txwi, skb, wcid, sta, skb->len);
ret = mt76x2_insert_hdr_pad(skb);
if (ret < 0)
return ret;
if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
qsel = MT_QSEL_MGMT;
*tx_info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
MT_TXD_INFO_80211;
if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
*tx_info |= MT_TXD_INFO_WIV;
return 0;
}
static void
mt76x2_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct mt76x2_dev *dev = (struct mt76x2_dev *) priv;
struct mt76x2_vif *mvif = (struct mt76x2_vif *) vif->drv_priv;
struct sk_buff *skb = NULL;
if (!(dev->beacon_mask & BIT(mvif->idx)))
return;
skb = ieee80211_beacon_get(mt76_hw(dev), vif);
if (!skb)
return;
mt76x2_mac_set_beacon(dev, mvif->idx, skb);
}
static void
mt76x2_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct beacon_bc_data *data = priv;
struct mt76x2_dev *dev = data->dev;
struct mt76x2_vif *mvif = (struct mt76x2_vif *) vif->drv_priv;
struct ieee80211_tx_info *info;
struct sk_buff *skb;
if (!(dev->beacon_mask & BIT(mvif->idx)))
return;
skb = ieee80211_get_buffered_bc(mt76_hw(dev), vif);
if (!skb)
return;
info = IEEE80211_SKB_CB(skb);
info->control.vif = vif;
info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
mt76_skb_set_moredata(skb, true);
__skb_queue_tail(&data->q, skb);
data->tail[mvif->idx] = skb;
}
static void
mt76x2_resync_beacon_timer(struct mt76x2_dev *dev)
{
u32 timer_val = dev->beacon_int << 4;
dev->tbtt_count++;
/*
* Beacon timer drifts by 1us every tick, the timer is configured
* in 1/16 TU (64us) units.
*/
if (dev->tbtt_count < 62)
return;
if (dev->tbtt_count >= 64) {
dev->tbtt_count = 0;
return;
}
/*
* The updated beacon interval takes effect after two TBTT, because
* at this point the original interval has already been loaded into
* the next TBTT_TIMER value
*/
if (dev->tbtt_count == 62)
timer_val -= 1;
mt76_rmw_field(dev, MT_BEACON_TIME_CFG,
MT_BEACON_TIME_CFG_INTVAL, timer_val);
}
void mt76x2_pre_tbtt_tasklet(unsigned long arg)
{
struct mt76x2_dev *dev = (struct mt76x2_dev *) arg;
struct mt76_queue *q = &dev->mt76.q_tx[MT_TXQ_PSD];
struct beacon_bc_data data = {};
struct sk_buff *skb;
int i, nframes;
mt76x2_resync_beacon_timer(dev);
data.dev = dev;
__skb_queue_head_init(&data.q);
ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
IEEE80211_IFACE_ITER_RESUME_ALL,
mt76x2_update_beacon_iter, dev);
do {
nframes = skb_queue_len(&data.q);
ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
IEEE80211_IFACE_ITER_RESUME_ALL,
mt76x2_add_buffered_bc, &data);
} while (nframes != skb_queue_len(&data.q));
if (!nframes)
return;
for (i = 0; i < ARRAY_SIZE(data.tail); i++) {
if (!data.tail[i])
continue;
mt76_skb_set_moredata(data.tail[i], false);
}
spin_lock_bh(&q->lock);
while ((skb = __skb_dequeue(&data.q)) != NULL) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_vif *vif = info->control.vif;
struct mt76x2_vif *mvif = (struct mt76x2_vif *) vif->drv_priv;
mt76_dma_tx_queue_skb(&dev->mt76, q, skb, &mvif->group_wcid,
NULL);
}
spin_unlock_bh(&q->lock);
}
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