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1// SPDX-License-Identifier: ISC2/*3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>4 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>5 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>6 */7 8#include "mt76x02.h"9 10static void mt76x02_set_beacon_offsets(struct mt76x02_dev *dev)11{12 u32 regs[4] = {};13 u16 val;14 int i;15 16 for (i = 0; i < dev->beacon_ops->nslots; i++) {17 val = i * dev->beacon_ops->slot_size;18 regs[i / 4] |= (val / 64) << (8 * (i % 4));19 }20 21 for (i = 0; i < 4; i++)22 mt76_wr(dev, MT_BCN_OFFSET(i), regs[i]);23}24 25static int26mt76x02_write_beacon(struct mt76x02_dev *dev, int offset, struct sk_buff *skb)27{28 int beacon_len = dev->beacon_ops->slot_size;29 30 if (WARN_ON_ONCE(beacon_len < skb->len + sizeof(struct mt76x02_txwi)))31 return -ENOSPC;32 33 /* USB devices already reserve enough skb headroom for txwi's. This34 * helps to save slow copies over USB.35 */36 if (mt76_is_usb(&dev->mt76)) {37 struct mt76x02_txwi *txwi;38 39 txwi = (struct mt76x02_txwi *)(skb->data - sizeof(*txwi));40 mt76x02_mac_write_txwi(dev, txwi, skb, NULL, NULL, skb->len);41 skb_push(skb, sizeof(*txwi));42 } else {43 struct mt76x02_txwi txwi;44 45 mt76x02_mac_write_txwi(dev, &txwi, skb, NULL, NULL, skb->len);46 mt76_wr_copy(dev, offset, &txwi, sizeof(txwi));47 offset += sizeof(txwi);48 }49 50 mt76_wr_copy(dev, offset, skb->data, skb->len);51 return 0;52}53 54void mt76x02_mac_set_beacon(struct mt76x02_dev *dev,55 struct sk_buff *skb)56{57 int bcn_len = dev->beacon_ops->slot_size;58 int bcn_addr = MT_BEACON_BASE + (bcn_len * dev->beacon_data_count);59 60 if (!mt76x02_write_beacon(dev, bcn_addr, skb)) {61 if (!dev->beacon_data_count)62 dev->beacon_hang_check++;63 dev->beacon_data_count++;64 }65 dev_kfree_skb(skb);66}67EXPORT_SYMBOL_GPL(mt76x02_mac_set_beacon);68 69void mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev,70 struct ieee80211_vif *vif, bool enable)71{72 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;73 u8 old_mask = dev->mt76.beacon_mask;74 75 mt76x02_pre_tbtt_enable(dev, false);76 77 if (!dev->mt76.beacon_mask)78 dev->tbtt_count = 0;79 80 dev->beacon_hang_check = 0;81 if (enable) {82 dev->mt76.beacon_mask |= BIT(mvif->idx);83 } else {84 dev->mt76.beacon_mask &= ~BIT(mvif->idx);85 }86 87 if (!!old_mask == !!dev->mt76.beacon_mask)88 goto out;89 90 if (dev->mt76.beacon_mask)91 mt76_set(dev, MT_BEACON_TIME_CFG,92 MT_BEACON_TIME_CFG_BEACON_TX |93 MT_BEACON_TIME_CFG_TBTT_EN |94 MT_BEACON_TIME_CFG_TIMER_EN);95 else96 mt76_clear(dev, MT_BEACON_TIME_CFG,97 MT_BEACON_TIME_CFG_BEACON_TX |98 MT_BEACON_TIME_CFG_TBTT_EN |99 MT_BEACON_TIME_CFG_TIMER_EN);100 mt76x02_beacon_enable(dev, !!dev->mt76.beacon_mask);101 102out:103 mt76x02_pre_tbtt_enable(dev, true);104}105 106void107mt76x02_resync_beacon_timer(struct mt76x02_dev *dev)108{109 u32 timer_val = dev->mt76.beacon_int << 4;110 111 dev->tbtt_count++;112 113 /*114 * Beacon timer drifts by 1us every tick, the timer is configured115 * in 1/16 TU (64us) units.116 */117 if (dev->tbtt_count < 63)118 return;119 120 /*121 * The updated beacon interval takes effect after two TBTT, because122 * at this point the original interval has already been loaded into123 * the next TBTT_TIMER value124 */125 if (dev->tbtt_count == 63)126 timer_val -= 1;127 128 mt76_rmw_field(dev, MT_BEACON_TIME_CFG,129 MT_BEACON_TIME_CFG_INTVAL, timer_val);130 131 if (dev->tbtt_count >= 64)132 dev->tbtt_count = 0;133}134EXPORT_SYMBOL_GPL(mt76x02_resync_beacon_timer);135 136void137mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)138{139 struct beacon_bc_data *data = priv;140 struct mt76x02_dev *dev = data->dev;141 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;142 struct sk_buff *skb = NULL;143 144 if (!(dev->mt76.beacon_mask & BIT(mvif->idx)))145 return;146 147 skb = ieee80211_beacon_get(mt76_hw(dev), vif, 0);148 if (!skb)149 return;150 151 __skb_queue_tail(&data->q, skb);152}153EXPORT_SYMBOL_GPL(mt76x02_update_beacon_iter);154 155static void156mt76x02_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif)157{158 struct beacon_bc_data *data = priv;159 struct mt76x02_dev *dev = data->dev;160 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;161 struct ieee80211_tx_info *info;162 struct sk_buff *skb;163 164 if (!(dev->mt76.beacon_mask & BIT(mvif->idx)))165 return;166 167 skb = ieee80211_get_buffered_bc(mt76_hw(dev), vif);168 if (!skb)169 return;170 171 info = IEEE80211_SKB_CB(skb);172 info->control.vif = vif;173 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;174 mt76_skb_set_moredata(skb, true);175 __skb_queue_tail(&data->q, skb);176 data->tail[mvif->idx] = skb;177}178 179void180mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev,181 struct beacon_bc_data *data,182 int max_nframes)183{184 int i, nframes;185 186 do {187 nframes = skb_queue_len(&data->q);188 ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),189 IEEE80211_IFACE_ITER_RESUME_ALL,190 mt76x02_add_buffered_bc, data);191 } while (nframes != skb_queue_len(&data->q) &&192 skb_queue_len(&data->q) < max_nframes);193 194 if (!skb_queue_len(&data->q))195 return;196 197 for (i = 0; i < ARRAY_SIZE(data->tail); i++) {198 if (!data->tail[i])199 continue;200 mt76_skb_set_moredata(data->tail[i], false);201 }202}203EXPORT_SYMBOL_GPL(mt76x02_enqueue_buffered_bc);204 205void mt76x02_init_beacon_config(struct mt76x02_dev *dev)206{207 mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |208 MT_BEACON_TIME_CFG_TBTT_EN |209 MT_BEACON_TIME_CFG_BEACON_TX));210 mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE);211 mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff);212 mt76x02_set_beacon_offsets(dev);213}214EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config);215 216