developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | /* |
| 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 | |
| 10 | static 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 | |
| 25 | static int |
| 26 | mt76x02_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. This |
| 34 | * 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 | |
| 54 | void 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 | dev->beacon_data_count++; |
| 62 | dev_kfree_skb(skb); |
| 63 | } |
| 64 | EXPORT_SYMBOL_GPL(mt76x02_mac_set_beacon); |
| 65 | |
| 66 | void mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev, |
| 67 | struct ieee80211_vif *vif, bool enable) |
| 68 | { |
| 69 | struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv; |
| 70 | u8 old_mask = dev->mt76.beacon_mask; |
| 71 | |
| 72 | mt76x02_pre_tbtt_enable(dev, false); |
| 73 | |
| 74 | if (!dev->mt76.beacon_mask) |
| 75 | dev->tbtt_count = 0; |
| 76 | |
| 77 | if (enable) { |
| 78 | dev->mt76.beacon_mask |= BIT(mvif->idx); |
| 79 | } else { |
| 80 | dev->mt76.beacon_mask &= ~BIT(mvif->idx); |
| 81 | } |
| 82 | |
| 83 | if (!!old_mask == !!dev->mt76.beacon_mask) |
| 84 | goto out; |
| 85 | |
| 86 | if (dev->mt76.beacon_mask) |
| 87 | mt76_set(dev, MT_BEACON_TIME_CFG, |
| 88 | MT_BEACON_TIME_CFG_BEACON_TX | |
| 89 | MT_BEACON_TIME_CFG_TBTT_EN | |
| 90 | MT_BEACON_TIME_CFG_TIMER_EN); |
| 91 | else |
| 92 | mt76_clear(dev, MT_BEACON_TIME_CFG, |
| 93 | MT_BEACON_TIME_CFG_BEACON_TX | |
| 94 | MT_BEACON_TIME_CFG_TBTT_EN | |
| 95 | MT_BEACON_TIME_CFG_TIMER_EN); |
| 96 | mt76x02_beacon_enable(dev, !!dev->mt76.beacon_mask); |
| 97 | |
| 98 | out: |
| 99 | mt76x02_pre_tbtt_enable(dev, true); |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | mt76x02_resync_beacon_timer(struct mt76x02_dev *dev) |
| 104 | { |
| 105 | u32 timer_val = dev->mt76.beacon_int << 4; |
| 106 | |
| 107 | dev->tbtt_count++; |
| 108 | |
| 109 | /* |
| 110 | * Beacon timer drifts by 1us every tick, the timer is configured |
| 111 | * in 1/16 TU (64us) units. |
| 112 | */ |
| 113 | if (dev->tbtt_count < 63) |
| 114 | return; |
| 115 | |
| 116 | /* |
| 117 | * The updated beacon interval takes effect after two TBTT, because |
| 118 | * at this point the original interval has already been loaded into |
| 119 | * the next TBTT_TIMER value |
| 120 | */ |
| 121 | if (dev->tbtt_count == 63) |
| 122 | timer_val -= 1; |
| 123 | |
| 124 | mt76_rmw_field(dev, MT_BEACON_TIME_CFG, |
| 125 | MT_BEACON_TIME_CFG_INTVAL, timer_val); |
| 126 | |
| 127 | if (dev->tbtt_count >= 64) |
| 128 | dev->tbtt_count = 0; |
| 129 | } |
| 130 | EXPORT_SYMBOL_GPL(mt76x02_resync_beacon_timer); |
| 131 | |
| 132 | void |
| 133 | mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif) |
| 134 | { |
| 135 | struct mt76x02_dev *dev = (struct mt76x02_dev *)priv; |
| 136 | struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv; |
| 137 | struct sk_buff *skb = NULL; |
| 138 | |
| 139 | if (!(dev->mt76.beacon_mask & BIT(mvif->idx))) |
| 140 | return; |
| 141 | |
| 142 | skb = ieee80211_beacon_get(mt76_hw(dev), vif); |
| 143 | if (!skb) |
| 144 | return; |
| 145 | |
| 146 | mt76x02_mac_set_beacon(dev, skb); |
| 147 | } |
| 148 | EXPORT_SYMBOL_GPL(mt76x02_update_beacon_iter); |
| 149 | |
| 150 | static void |
| 151 | mt76x02_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif) |
| 152 | { |
| 153 | struct beacon_bc_data *data = priv; |
| 154 | struct mt76x02_dev *dev = data->dev; |
| 155 | struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv; |
| 156 | struct ieee80211_tx_info *info; |
| 157 | struct sk_buff *skb; |
| 158 | |
| 159 | if (!(dev->mt76.beacon_mask & BIT(mvif->idx))) |
| 160 | return; |
| 161 | |
| 162 | skb = ieee80211_get_buffered_bc(mt76_hw(dev), vif); |
| 163 | if (!skb) |
| 164 | return; |
| 165 | |
| 166 | info = IEEE80211_SKB_CB(skb); |
| 167 | info->control.vif = vif; |
| 168 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
| 169 | mt76_skb_set_moredata(skb, true); |
| 170 | __skb_queue_tail(&data->q, skb); |
| 171 | data->tail[mvif->idx] = skb; |
| 172 | } |
| 173 | |
| 174 | void |
| 175 | mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev, |
| 176 | struct beacon_bc_data *data, |
| 177 | int max_nframes) |
| 178 | { |
| 179 | int i, nframes; |
| 180 | |
| 181 | data->dev = dev; |
| 182 | __skb_queue_head_init(&data->q); |
| 183 | |
| 184 | do { |
| 185 | nframes = skb_queue_len(&data->q); |
| 186 | ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev), |
| 187 | IEEE80211_IFACE_ITER_RESUME_ALL, |
| 188 | mt76x02_add_buffered_bc, data); |
| 189 | } while (nframes != skb_queue_len(&data->q) && |
| 190 | skb_queue_len(&data->q) < max_nframes); |
| 191 | |
| 192 | if (!skb_queue_len(&data->q)) |
| 193 | return; |
| 194 | |
| 195 | for (i = 0; i < ARRAY_SIZE(data->tail); i++) { |
| 196 | if (!data->tail[i]) |
| 197 | continue; |
| 198 | mt76_skb_set_moredata(data->tail[i], false); |
| 199 | } |
| 200 | } |
| 201 | EXPORT_SYMBOL_GPL(mt76x02_enqueue_buffered_bc); |
| 202 | |
| 203 | void mt76x02_init_beacon_config(struct mt76x02_dev *dev) |
| 204 | { |
| 205 | mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN | |
| 206 | MT_BEACON_TIME_CFG_TBTT_EN | |
| 207 | MT_BEACON_TIME_CFG_BEACON_TX)); |
| 208 | mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE); |
| 209 | mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff); |
| 210 | mt76x02_set_beacon_offsets(dev); |
| 211 | } |
| 212 | EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config); |
| 213 | |