2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
4 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 static void mt76x02_set_beacon_offsets(struct mt76x02_dev *dev)
27 for (i = 0; i < dev->beacon_ops->nslots; i++) {
28 val = i * dev->beacon_ops->slot_size;
29 regs[i / 4] |= (val / 64) << (8 * (i % 4));
32 for (i = 0; i < 4; i++)
33 mt76_wr(dev, MT_BCN_OFFSET(i), regs[i]);
37 mt76x02_write_beacon(struct mt76x02_dev *dev, int offset, struct sk_buff *skb)
39 int beacon_len = dev->beacon_ops->slot_size;
40 struct mt76x02_txwi txwi;
42 if (WARN_ON_ONCE(beacon_len < skb->len + sizeof(struct mt76x02_txwi)))
45 mt76x02_mac_write_txwi(dev, &txwi, skb, NULL, NULL, skb->len);
47 mt76_wr_copy(dev, offset, &txwi, sizeof(txwi));
48 offset += sizeof(txwi);
50 mt76_wr_copy(dev, offset, skb->data, skb->len);
55 __mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 bcn_idx,
58 int beacon_len = dev->beacon_ops->slot_size;
59 int beacon_addr = MT_BEACON_BASE + (beacon_len * bcn_idx);
63 /* Prevent corrupt transmissions during update */
64 mt76_set(dev, MT_BCN_BYPASS_MASK, BIT(bcn_idx));
67 ret = mt76x02_write_beacon(dev, beacon_addr, skb);
69 dev->beacon_data_mask |= BIT(bcn_idx);
71 dev->beacon_data_mask &= ~BIT(bcn_idx);
72 for (i = 0; i < beacon_len; i += 4)
73 mt76_wr(dev, beacon_addr + i, 0);
76 mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xff00 | ~dev->beacon_data_mask);
81 int mt76x02_mac_set_beacon(struct mt76x02_dev *dev, u8 vif_idx,
84 bool force_update = false;
88 for (i = 0; i < ARRAY_SIZE(dev->beacons); i++) {
90 force_update = !!dev->beacons[i] ^ !!skb;
93 dev_kfree_skb(dev->beacons[i]);
95 dev->beacons[i] = skb;
96 __mt76x02_mac_set_beacon(dev, bcn_idx, skb);
97 } else if (force_update && dev->beacons[i]) {
98 __mt76x02_mac_set_beacon(dev, bcn_idx,
102 bcn_idx += !!dev->beacons[i];
105 for (i = bcn_idx; i < ARRAY_SIZE(dev->beacons); i++) {
106 if (!(dev->beacon_data_mask & BIT(i)))
109 __mt76x02_mac_set_beacon(dev, i, NULL);
112 mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N,
116 EXPORT_SYMBOL_GPL(mt76x02_mac_set_beacon);
119 __mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev, u8 vif_idx,
120 bool val, struct sk_buff *skb)
122 u8 old_mask = dev->mt76.beacon_mask;
127 dev->mt76.beacon_mask |= BIT(vif_idx);
129 mt76x02_mac_set_beacon(dev, vif_idx, skb);
131 dev->mt76.beacon_mask &= ~BIT(vif_idx);
132 mt76x02_mac_set_beacon(dev, vif_idx, NULL);
135 if (!!old_mask == !!dev->mt76.beacon_mask)
138 en = dev->mt76.beacon_mask;
140 reg = MT_BEACON_TIME_CFG_BEACON_TX |
141 MT_BEACON_TIME_CFG_TBTT_EN |
142 MT_BEACON_TIME_CFG_TIMER_EN;
143 mt76_rmw(dev, MT_BEACON_TIME_CFG, reg, reg * en);
145 dev->beacon_ops->beacon_enable(dev, en);
148 void mt76x02_mac_set_beacon_enable(struct mt76x02_dev *dev,
149 struct ieee80211_vif *vif, bool val)
151 u8 vif_idx = ((struct mt76x02_vif *)vif->drv_priv)->idx;
152 struct sk_buff *skb = NULL;
154 dev->beacon_ops->pre_tbtt_enable(dev, false);
156 if (mt76_is_usb(dev))
157 skb = ieee80211_beacon_get(mt76_hw(dev), vif);
159 if (!dev->mt76.beacon_mask)
162 __mt76x02_mac_set_beacon_enable(dev, vif_idx, val, skb);
164 dev->beacon_ops->pre_tbtt_enable(dev, true);
168 mt76x02_resync_beacon_timer(struct mt76x02_dev *dev)
170 u32 timer_val = dev->mt76.beacon_int << 4;
175 * Beacon timer drifts by 1us every tick, the timer is configured
176 * in 1/16 TU (64us) units.
178 if (dev->tbtt_count < 63)
182 * The updated beacon interval takes effect after two TBTT, because
183 * at this point the original interval has already been loaded into
184 * the next TBTT_TIMER value
186 if (dev->tbtt_count == 63)
189 mt76_rmw_field(dev, MT_BEACON_TIME_CFG,
190 MT_BEACON_TIME_CFG_INTVAL, timer_val);
192 if (dev->tbtt_count >= 64)
195 EXPORT_SYMBOL_GPL(mt76x02_resync_beacon_timer);
198 mt76x02_update_beacon_iter(void *priv, u8 *mac, struct ieee80211_vif *vif)
200 struct mt76x02_dev *dev = (struct mt76x02_dev *)priv;
201 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
202 struct sk_buff *skb = NULL;
204 if (!(dev->mt76.beacon_mask & BIT(mvif->idx)))
207 skb = ieee80211_beacon_get(mt76_hw(dev), vif);
211 mt76x02_mac_set_beacon(dev, mvif->idx, skb);
213 EXPORT_SYMBOL_GPL(mt76x02_update_beacon_iter);
216 mt76x02_add_buffered_bc(void *priv, u8 *mac, struct ieee80211_vif *vif)
218 struct beacon_bc_data *data = priv;
219 struct mt76x02_dev *dev = data->dev;
220 struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
221 struct ieee80211_tx_info *info;
224 if (!(dev->mt76.beacon_mask & BIT(mvif->idx)))
227 skb = ieee80211_get_buffered_bc(mt76_hw(dev), vif);
231 info = IEEE80211_SKB_CB(skb);
232 info->control.vif = vif;
233 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
234 mt76_skb_set_moredata(skb, true);
235 __skb_queue_tail(&data->q, skb);
236 data->tail[mvif->idx] = skb;
240 mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev, struct beacon_bc_data *data,
246 __skb_queue_head_init(&data->q);
249 nframes = skb_queue_len(&data->q);
250 ieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),
251 IEEE80211_IFACE_ITER_RESUME_ALL,
252 mt76x02_add_buffered_bc, data);
253 } while (nframes != skb_queue_len(&data->q) &&
254 skb_queue_len(&data->q) < max_nframes);
256 if (!skb_queue_len(&data->q))
259 for (i = 0; i < ARRAY_SIZE(data->tail); i++) {
262 mt76_skb_set_moredata(data->tail[i], false);
265 EXPORT_SYMBOL_GPL(mt76x02_enqueue_buffered_bc);
267 void mt76x02_init_beacon_config(struct mt76x02_dev *dev)
271 mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |
272 MT_BEACON_TIME_CFG_TBTT_EN |
273 MT_BEACON_TIME_CFG_BEACON_TX));
274 mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE);
275 mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff);
277 for (i = 0; i < 8; i++)
278 mt76x02_mac_set_beacon(dev, i, NULL);
280 mt76x02_set_beacon_offsets(dev);
282 EXPORT_SYMBOL_GPL(mt76x02_init_beacon_config);