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6#include "mt76x02_usb.h"
7
8static void mt76x02u_remove_dma_hdr(struct sk_buff *skb)
9{
10 int hdr_len;
11
12 skb_pull(skb, sizeof(struct mt76x02_txwi) + MT_DMA_HDR_LEN);
13 hdr_len = ieee80211_get_hdrlen_from_skb(skb);
14 if (hdr_len % 4)
15 mt76x02_remove_hdr_pad(skb, 2);
16}
17
18void mt76x02u_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
19{
20 mt76x02u_remove_dma_hdr(e->skb);
21 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
22}
23EXPORT_SYMBOL_GPL(mt76x02u_tx_complete_skb);
24
25int mt76x02u_mac_start(struct mt76x02_dev *dev)
26{
27 mt76x02_mac_reset_counters(dev);
28
29 mt76_wr(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
30 if (!mt76x02_wait_for_wpdma(&dev->mt76, 200000))
31 return -ETIMEDOUT;
32
33 mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
34
35 mt76_wr(dev, MT_MAC_SYS_CTRL,
36 MT_MAC_SYS_CTRL_ENABLE_TX |
37 MT_MAC_SYS_CTRL_ENABLE_RX);
38
39 if (!mt76x02_wait_for_wpdma(&dev->mt76, 50))
40 return -ETIMEDOUT;
41
42 return 0;
43}
44EXPORT_SYMBOL_GPL(mt76x02u_mac_start);
45
46int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
47{
48 u32 info, pad;
49
50
51
52
53
54
55
56 info = FIELD_PREP(MT_TXD_INFO_LEN, round_up(skb->len, 4)) |
57 FIELD_PREP(MT_TXD_INFO_DPORT, port) | flags;
58 put_unaligned_le32(info, skb_push(skb, sizeof(info)));
59
60 pad = round_up(skb->len, 4) + 4 - skb->len;
61 return mt76_skb_adjust_pad(skb, pad);
62}
63
64int mt76x02u_tx_prepare_skb(struct mt76_dev *mdev, void *data,
65 enum mt76_txq_id qid, struct mt76_wcid *wcid,
66 struct ieee80211_sta *sta,
67 struct mt76_tx_info *tx_info)
68{
69 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
70 int pid, len = tx_info->skb->len, ep = q2ep(dev->mphy.q_tx[qid]->hw_idx);
71 struct mt76x02_txwi *txwi;
72 bool ampdu = IEEE80211_SKB_CB(tx_info->skb)->flags & IEEE80211_TX_CTL_AMPDU;
73 enum mt76_qsel qsel;
74 u32 flags;
75 int err;
76
77 mt76_insert_hdr_pad(tx_info->skb);
78
79 txwi = (struct mt76x02_txwi *)(tx_info->skb->data - sizeof(*txwi));
80 mt76x02_mac_write_txwi(dev, txwi, tx_info->skb, wcid, sta, len);
81 skb_push(tx_info->skb, sizeof(*txwi));
82
83 pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
84
85
86 if (pid == MT_PACKET_ID_NO_SKB)
87 pid = MT_PACKET_ID_HAS_RATE |
88 (le16_to_cpu(txwi->rate) & MT_PKTID_RATE) |
89 FIELD_PREP(MT_PKTID_AC,
90 skb_get_queue_mapping(tx_info->skb));
91
92 txwi->pktid = pid;
93
94 if ((mt76_is_skb_pktid(pid) && ampdu) || ep == MT_EP_OUT_HCCA)
95 qsel = MT_QSEL_MGMT;
96 else
97 qsel = MT_QSEL_EDCA;
98
99 flags = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
100 MT_TXD_INFO_80211;
101 if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
102 flags |= MT_TXD_INFO_WIV;
103
104 if (sta) {
105 struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
106
107 ewma_pktlen_add(&msta->pktlen, tx_info->skb->len);
108 }
109
110 err = mt76x02u_skb_dma_info(tx_info->skb, WLAN_PORT, flags);
111 if (err && wcid)
112
113 idr_remove(&wcid->pktid, pid);
114
115 return err;
116}
117EXPORT_SYMBOL_GPL(mt76x02u_tx_prepare_skb);
118
119
120#define PRE_TBTT_USEC 8000
121
122
123
124
125
126#define N_BCN_SLOTS 5
127
128static void mt76x02u_start_pre_tbtt_timer(struct mt76x02_dev *dev)
129{
130 u64 time;
131 u32 tbtt;
132
133
134 tbtt = mt76_get_field(dev, MT_TBTT_TIMER, MT_TBTT_TIMER_VAL);
135 tbtt *= 32;
136
137 if (tbtt <= PRE_TBTT_USEC) {
138 queue_work(system_highpri_wq, &dev->pre_tbtt_work);
139 return;
140 }
141
142 time = (tbtt - PRE_TBTT_USEC) * 1000ull;
143 hrtimer_start(&dev->pre_tbtt_timer, time, HRTIMER_MODE_REL);
144}
145
146static void mt76x02u_restart_pre_tbtt_timer(struct mt76x02_dev *dev)
147{
148 u32 tbtt, dw0, dw1;
149 u64 tsf, time;
150
151
152 tbtt = mt76_get_field(dev, MT_TBTT_TIMER, MT_TBTT_TIMER_VAL);
153 tbtt *= 32;
154
155 dw0 = mt76_rr(dev, MT_TSF_TIMER_DW0);
156 dw1 = mt76_rr(dev, MT_TSF_TIMER_DW1);
157 tsf = (u64)dw0 << 32 | dw1;
158 dev_dbg(dev->mt76.dev, "TSF: %llu us TBTT %u us\n", tsf, tbtt);
159
160
161 time = ((1000000000ull * dev->mt76.beacon_int) >> 10);
162
163
164 if (tbtt < PRE_TBTT_USEC)
165 time -= (PRE_TBTT_USEC - tbtt) * 1000ull;
166 else
167 time += (tbtt - PRE_TBTT_USEC) * 1000ull;
168
169 hrtimer_start(&dev->pre_tbtt_timer, time, HRTIMER_MODE_REL);
170}
171
172static void mt76x02u_stop_pre_tbtt_timer(struct mt76x02_dev *dev)
173{
174 do {
175 hrtimer_cancel(&dev->pre_tbtt_timer);
176 cancel_work_sync(&dev->pre_tbtt_work);
177
178 } while (hrtimer_active(&dev->pre_tbtt_timer));
179}
180
181static void mt76x02u_pre_tbtt_work(struct work_struct *work)
182{
183 struct mt76x02_dev *dev =
184 container_of(work, struct mt76x02_dev, pre_tbtt_work);
185 struct beacon_bc_data data = {};
186 struct sk_buff *skb;
187 int nbeacons;
188
189 if (!dev->mt76.beacon_mask)
190 return;
191
192 if (mt76_hw(dev)->conf.flags & IEEE80211_CONF_OFFCHANNEL)
193 return;
194
195 mt76x02_resync_beacon_timer(dev);
196
197
198 mt76_set(dev, MT_BCN_BYPASS_MASK, 0xffff);
199 dev->beacon_data_count = 0;
200
201 ieee80211_iterate_active_interfaces(mt76_hw(dev),
202 IEEE80211_IFACE_ITER_RESUME_ALL,
203 mt76x02_update_beacon_iter, dev);
204
205 mt76_csa_check(&dev->mt76);
206
207 if (dev->mt76.csa_complete) {
208 mt76_csa_finish(&dev->mt76);
209 goto out;
210 }
211
212 nbeacons = hweight8(dev->mt76.beacon_mask);
213 mt76x02_enqueue_buffered_bc(dev, &data, N_BCN_SLOTS - nbeacons);
214
215 while ((skb = __skb_dequeue(&data.q)) != NULL)
216 mt76x02_mac_set_beacon(dev, skb);
217
218out:
219 mt76_wr(dev, MT_BCN_BYPASS_MASK,
220 0xff00 | ~(0xff00 >> dev->beacon_data_count));
221
222 mt76x02u_restart_pre_tbtt_timer(dev);
223}
224
225static enum hrtimer_restart mt76x02u_pre_tbtt_interrupt(struct hrtimer *timer)
226{
227 struct mt76x02_dev *dev =
228 container_of(timer, struct mt76x02_dev, pre_tbtt_timer);
229
230 queue_work(system_highpri_wq, &dev->pre_tbtt_work);
231
232 return HRTIMER_NORESTART;
233}
234
235static void mt76x02u_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)
236{
237 if (en && dev->mt76.beacon_mask &&
238 !hrtimer_active(&dev->pre_tbtt_timer))
239 mt76x02u_start_pre_tbtt_timer(dev);
240 if (!en)
241 mt76x02u_stop_pre_tbtt_timer(dev);
242}
243
244static void mt76x02u_beacon_enable(struct mt76x02_dev *dev, bool en)
245{
246 if (WARN_ON_ONCE(!dev->mt76.beacon_int))
247 return;
248
249 if (en)
250 mt76x02u_start_pre_tbtt_timer(dev);
251}
252
253void mt76x02u_init_beacon_config(struct mt76x02_dev *dev)
254{
255 static const struct mt76x02_beacon_ops beacon_ops = {
256 .nslots = N_BCN_SLOTS,
257 .slot_size = (8192 / N_BCN_SLOTS) & ~63,
258 .pre_tbtt_enable = mt76x02u_pre_tbtt_enable,
259 .beacon_enable = mt76x02u_beacon_enable,
260 };
261 dev->beacon_ops = &beacon_ops;
262
263 hrtimer_init(&dev->pre_tbtt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
264 dev->pre_tbtt_timer.function = mt76x02u_pre_tbtt_interrupt;
265 INIT_WORK(&dev->pre_tbtt_work, mt76x02u_pre_tbtt_work);
266
267 mt76x02_init_beacon_config(dev);
268}
269EXPORT_SYMBOL_GPL(mt76x02u_init_beacon_config);
270
271void mt76x02u_exit_beacon_config(struct mt76x02_dev *dev)
272{
273 if (!test_bit(MT76_REMOVED, &dev->mphy.state))
274 mt76_clear(dev, MT_BEACON_TIME_CFG,
275 MT_BEACON_TIME_CFG_TIMER_EN |
276 MT_BEACON_TIME_CFG_SYNC_MODE |
277 MT_BEACON_TIME_CFG_TBTT_EN |
278 MT_BEACON_TIME_CFG_BEACON_TX);
279
280 mt76x02u_stop_pre_tbtt_timer(dev);
281}
282EXPORT_SYMBOL_GPL(mt76x02u_exit_beacon_config);
283
