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// SPDX-License-Identifier: ISC
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
* Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
* Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
*/
#include "mt76x02.h"
static void mt76x02_set_beacon_offsets(struct mt76x02_dev *dev)
{
u32 regs[4] = {};
u16 val;
int i;
for (i = 0; i < dev->beacon_ops->nslots; i++) {
val = i * dev->beacon_ops->slot_size;
regs[i / 4] |= (val / 64) << (8 * (i % 4));
}
for (i = 0; i < 4; i++)
mt76_wr(dev, MT_BCN_OFFSET(i), regs[i]);
}
static int
mt76x02_write_beacon(struct mt76x02_dev *dev, int offset, struct sk_buff *skb)
{
int beacon_len = dev->beacon_ops->slot_size;
struct mt76x02_txwi txwi;
if (WARN_ON_ONCE(beacon_len < skb->len + sizeof(struct mt76x02_txwi)))
return -ENOSPC;
mt76x02_mac_write_txwi(dev, &txwi, skb, NULL, NULL, skb->len);
mt76_wr_copy(dev, offset, &txwi, sizeof(txwi));
offset += sizeof(txwi);
mt76_wr_copy(dev, offset, skb->data, skb->len);
return 0;
}
static int
__mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 bcn_idx,
struct sk_buff *skb)
{
int beacon_len = dev->beacon_ops->slot_size;
int beacon_addr = MT_BEACON_BASE + (beacon_len * bcn_idx);
int ret = 0;
int i;
/* Prevent corrupt transmissions during update */
mt76_set(dev, MT_BCN_BYPASS_MASK, BIT(bcn_idx));
if (skb) {
ret = mt76x02_write_beacon(dev, beacon_addr, skb);
if (!ret)
dev->beacon_data_mask |= BIT(bcn_idx);
} else {
dev->beacon_data_mask &= ~BIT(bcn_idx);
for (i = 0; i < beacon_len; i += 4)
mt76_wr(dev, beacon_addr + i, 0);
}
mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xff00 | ~dev->beacon_data_mask);
return ret;
}
int mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 vif_idx,
struct sk_buff *skb)
{
bool force_update = false;
int bcn_idx = 0;
int i;
for (i = 0; i < ARRAY_SIZE(dev->beacons); i++) {
if (vif_idx == i) {
force_update = !!dev->beacons[i] ^ !!skb;
dev_kfree_skb(dev->beacons[i]);
dev->beacons[i] = skb;
__mt76x02_mac_set_beacon(dev, bcn_idx, skb);
} else if (force_update && dev->beacons[i]) {
__mt76x02_mac_set_beacon(dev, bcn_idx,
dev->beacons[i]);
}
bcn_idx += !!dev->beacons[i];
}
for (i = bcn_idx; i < ARRAY_SIZE(dev->beacons); i++) {
if (!(dev->beacon_data_mask & BIT(i)))
break;
__mt76x02_mac_set_beacon(dev, i, NULL);
}
mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N,
bcn_idx - 1);
return 0;
}
EXPORT_SYMBOL_GPL(mt76x02_mac_set_beacon);
void mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev,
struct ieee80211_vif *vif, bool enable)
{
struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
u8 old_mask = dev->mt76.beacon_mask;
mt76x02_pre_tbtt_enable(dev, false);
if (!dev->mt76.beacon_mask)
dev->tbtt_count = 0;
if (enable) {
dev->mt76.beacon_mask |= BIT(mvif->idx);
} else {
dev->mt76.beacon_mask &= ~BIT(mvif->idx);
mt76x02_mac_set_beacon(dev, mvif->idx, NULL);
}
if (!!old_mask == !!dev->mt76.beacon_mask)
goto out;
if (dev->mt76.beacon_mask)
mt76_set(dev, MT_BEACON_TIME_CFG,
MT_BEACON_TIME_CFG_BEACON_TX |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_TIMER_EN);
else
mt76_clear(dev, MT_BEACON_TIME_CFG,
MT_BEACON_TIME_CFG_BEACON_TX |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_TIMER_EN);
mt76x02_beacon_enable(dev, !!dev->mt76.beacon_mask);
out:
mt76x02_pre_tbtt_enable(dev, true);
}
void
mt76x02_resync_beacon_timer(struct mt76x02_dev *dev)
{
u32 timer_val = dev->mt76.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 < 63)
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 == 63)
timer_val -= 1;
mt76_rmw_field(dev, MT_BEACON_TIME_CFG,
MT_BEACON_TIME_CFG_INTVAL, timer_val);
if (dev->tbtt_count >= 64)
dev->tbtt_count = 0;
}
EXPORT_SYMBOL_GPL(mt76x02_resync_beacon_timer);
void
mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct mt76x02_dev *dev = (struct mt76x02_dev *)priv;
struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
struct sk_buff *skb = NULL;
if (!(dev->mt76.beacon_mask & BIT(mvif->idx)))
return;
skb = ieee80211_beacon_get(mt76_hw(dev), vif);
if (!skb)
return;
mt76x02_mac_set_beacon(dev, mvif->idx, skb);
}
EXPORT_SYMBOL_GPL(mt76x02_update_beacon_iter);
static void
mt76x02_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif)
{
struct beacon_bc_data *data = priv;
struct mt76x02_dev *dev = data->dev;
struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
struct ieee80211_tx_info *info;
struct sk_buff *skb;
if (!(dev->mt76.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;
}
void
mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev,
struct beacon_bc_data *data,
int max_nframes)
{
int i, nframes;
data->dev = dev;
__skb_queue_head_init(&data->q);
do {
nframes = skb_queue_len(&data->q);
ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
IEEE80211_IFACE_ITER_RESUME_ALL,
mt76x02_add_buffered_bc, data);
} while (nframes != skb_queue_len(&data->q) &&
skb_queue_len(&data->q) < max_nframes);
if (!skb_queue_len(&data->q))
return;
for (i = 0; i < ARRAY_SIZE(data->tail); i++) {
if (!data->tail[i])
continue;
mt76_skb_set_moredata(data->tail[i], false);
}
}
EXPORT_SYMBOL_GPL(mt76x02_enqueue_buffered_bc);
void mt76x02_init_beacon_config(struct mt76x02_dev *dev)
{
int i;
mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |
MT_BEACON_TIME_CFG_TBTT_EN |
MT_BEACON_TIME_CFG_BEACON_TX));
mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE);
mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff);
for (i = 0; i < 8; i++)
mt76x02_mac_set_beacon(dev, i, NULL);
mt76x02_set_beacon_offsets(dev);
}
EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config);
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