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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;
- if (WARN_ON_ONCE(beacon_len < skb->len + sizeof(struct mt76x02_txwi)))
- return -ENOSPC;
- /* USB devices already reserve enough skb headroom for txwi's. This
- * helps to save slow copies over USB.
- */
- if (mt76_is_usb(&dev->mt76)) {
- struct mt76x02_txwi *txwi;
- txwi = (struct mt76x02_txwi *)(skb->data - sizeof(*txwi));
- mt76x02_mac_write_txwi(dev, txwi, skb, NULL, NULL, skb->len);
- skb_push(skb, sizeof(*txwi));
- } else {
- struct mt76x02_txwi txwi;
- 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;
- }
- void mt76x02_mac_set_beacon(struct mt76x02_dev *dev,
- struct sk_buff *skb)
- {
- int bcn_len = dev->beacon_ops->slot_size;
- int bcn_addr = MT_BEACON_BASE + (bcn_len * dev->beacon_data_count);
- if (!mt76x02_write_beacon(dev, bcn_addr, skb))
- dev->beacon_data_count++;
- dev_kfree_skb(skb);
- }
- 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);
- }
- 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, 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)
- {
- 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);
- mt76x02_set_beacon_offsets(dev);
- }
- EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config);
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