1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
5 */
6
7 #include "mt76x02.h"
8 #include "mt76x02_trace.h"
9 #include "trace.h"
10
mt76x02_mac_reset_counters(struct mt76x02_dev * dev)11 void mt76x02_mac_reset_counters(struct mt76x02_dev *dev)
12 {
13 int i;
14
15 mt76_rr(dev, MT_RX_STAT_0);
16 mt76_rr(dev, MT_RX_STAT_1);
17 mt76_rr(dev, MT_RX_STAT_2);
18 mt76_rr(dev, MT_TX_STA_0);
19 mt76_rr(dev, MT_TX_STA_1);
20 mt76_rr(dev, MT_TX_STA_2);
21
22 for (i = 0; i < 16; i++)
23 mt76_rr(dev, MT_TX_AGG_CNT(i));
24
25 for (i = 0; i < 16; i++)
26 mt76_rr(dev, MT_TX_STAT_FIFO);
27
28 memset(dev->mt76.aggr_stats, 0, sizeof(dev->mt76.aggr_stats));
29 }
30 EXPORT_SYMBOL_GPL(mt76x02_mac_reset_counters);
31
32 static enum mt76x02_cipher_type
mt76x02_mac_get_key_info(struct ieee80211_key_conf * key,u8 * key_data)33 mt76x02_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
34 {
35 memset(key_data, 0, 32);
36 if (!key)
37 return MT_CIPHER_NONE;
38
39 if (key->keylen > 32)
40 return MT_CIPHER_NONE;
41
42 memcpy(key_data, key->key, key->keylen);
43
44 switch (key->cipher) {
45 case WLAN_CIPHER_SUITE_WEP40:
46 return MT_CIPHER_WEP40;
47 case WLAN_CIPHER_SUITE_WEP104:
48 return MT_CIPHER_WEP104;
49 case WLAN_CIPHER_SUITE_TKIP:
50 return MT_CIPHER_TKIP;
51 case WLAN_CIPHER_SUITE_CCMP:
52 return MT_CIPHER_AES_CCMP;
53 default:
54 return MT_CIPHER_NONE;
55 }
56 }
57
mt76x02_mac_shared_key_setup(struct mt76x02_dev * dev,u8 vif_idx,u8 key_idx,struct ieee80211_key_conf * key)58 int mt76x02_mac_shared_key_setup(struct mt76x02_dev *dev, u8 vif_idx,
59 u8 key_idx, struct ieee80211_key_conf *key)
60 {
61 enum mt76x02_cipher_type cipher;
62 u8 key_data[32];
63 u32 val;
64
65 cipher = mt76x02_mac_get_key_info(key, key_data);
66 if (cipher == MT_CIPHER_NONE && key)
67 return -EOPNOTSUPP;
68
69 val = mt76_rr(dev, MT_SKEY_MODE(vif_idx));
70 val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx));
71 val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx);
72 mt76_wr(dev, MT_SKEY_MODE(vif_idx), val);
73
74 mt76_wr_copy(dev, MT_SKEY(vif_idx, key_idx), key_data,
75 sizeof(key_data));
76
77 return 0;
78 }
79 EXPORT_SYMBOL_GPL(mt76x02_mac_shared_key_setup);
80
mt76x02_mac_wcid_sync_pn(struct mt76x02_dev * dev,u8 idx,struct ieee80211_key_conf * key)81 void mt76x02_mac_wcid_sync_pn(struct mt76x02_dev *dev, u8 idx,
82 struct ieee80211_key_conf *key)
83 {
84 enum mt76x02_cipher_type cipher;
85 u8 key_data[32];
86 u32 iv, eiv;
87 u64 pn;
88
89 cipher = mt76x02_mac_get_key_info(key, key_data);
90 iv = mt76_rr(dev, MT_WCID_IV(idx));
91 eiv = mt76_rr(dev, MT_WCID_IV(idx) + 4);
92
93 pn = (u64)eiv << 16;
94 if (cipher == MT_CIPHER_TKIP) {
95 pn |= (iv >> 16) & 0xff;
96 pn |= (iv & 0xff) << 8;
97 } else if (cipher >= MT_CIPHER_AES_CCMP) {
98 pn |= iv & 0xffff;
99 } else {
100 return;
101 }
102
103 atomic64_set(&key->tx_pn, pn);
104 }
105
mt76x02_mac_wcid_set_key(struct mt76x02_dev * dev,u8 idx,struct ieee80211_key_conf * key)106 int mt76x02_mac_wcid_set_key(struct mt76x02_dev *dev, u8 idx,
107 struct ieee80211_key_conf *key)
108 {
109 enum mt76x02_cipher_type cipher;
110 u8 key_data[32];
111 u8 iv_data[8];
112 u64 pn;
113
114 cipher = mt76x02_mac_get_key_info(key, key_data);
115 if (cipher == MT_CIPHER_NONE && key)
116 return -EOPNOTSUPP;
117
118 mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data));
119 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher);
120
121 memset(iv_data, 0, sizeof(iv_data));
122 if (key) {
123 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PAIRWISE,
124 !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
125
126 pn = atomic64_read(&key->tx_pn);
127
128 iv_data[3] = key->keyidx << 6;
129 if (cipher >= MT_CIPHER_TKIP) {
130 iv_data[3] |= 0x20;
131 put_unaligned_le32(pn >> 16, &iv_data[4]);
132 }
133
134 if (cipher == MT_CIPHER_TKIP) {
135 iv_data[0] = (pn >> 8) & 0xff;
136 iv_data[1] = (iv_data[0] | 0x20) & 0x7f;
137 iv_data[2] = pn & 0xff;
138 } else if (cipher >= MT_CIPHER_AES_CCMP) {
139 put_unaligned_le16((pn & 0xffff), &iv_data[0]);
140 }
141 }
142
143 mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data));
144
145 return 0;
146 }
147
mt76x02_mac_wcid_setup(struct mt76x02_dev * dev,u8 idx,u8 vif_idx,u8 * mac)148 void mt76x02_mac_wcid_setup(struct mt76x02_dev *dev, u8 idx,
149 u8 vif_idx, u8 *mac)
150 {
151 struct mt76_wcid_addr addr = {};
152 u32 attr;
153
154 attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) |
155 FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8));
156
157 mt76_wr(dev, MT_WCID_ATTR(idx), attr);
158
159 if (idx >= 128)
160 return;
161
162 if (mac)
163 memcpy(addr.macaddr, mac, ETH_ALEN);
164
165 mt76_wr_copy(dev, MT_WCID_ADDR(idx), &addr, sizeof(addr));
166 }
167 EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_setup);
168
mt76x02_mac_wcid_set_drop(struct mt76x02_dev * dev,u8 idx,bool drop)169 void mt76x02_mac_wcid_set_drop(struct mt76x02_dev *dev, u8 idx, bool drop)
170 {
171 u32 val = mt76_rr(dev, MT_WCID_DROP(idx));
172 u32 bit = MT_WCID_DROP_MASK(idx);
173
174 /* prevent unnecessary writes */
175 if ((val & bit) != (bit * drop))
176 mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop));
177 }
178
179 static __le16
mt76x02_mac_tx_rate_val(struct mt76x02_dev * dev,const struct ieee80211_tx_rate * rate,u8 * nss_val)180 mt76x02_mac_tx_rate_val(struct mt76x02_dev *dev,
181 const struct ieee80211_tx_rate *rate, u8 *nss_val)
182 {
183 u8 phy, rate_idx, nss, bw = 0;
184 u16 rateval;
185
186 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
187 rate_idx = rate->idx;
188 nss = 1 + (rate->idx >> 4);
189 phy = MT_PHY_TYPE_VHT;
190 if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
191 bw = 2;
192 else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
193 bw = 1;
194 } else if (rate->flags & IEEE80211_TX_RC_MCS) {
195 rate_idx = rate->idx;
196 nss = 1 + (rate->idx >> 3);
197 phy = MT_PHY_TYPE_HT;
198 if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
199 phy = MT_PHY_TYPE_HT_GF;
200 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
201 bw = 1;
202 } else {
203 const struct ieee80211_rate *r;
204 int band = dev->mphy.chandef.chan->band;
205 u16 val;
206
207 r = &dev->mt76.hw->wiphy->bands[band]->bitrates[rate->idx];
208 if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
209 val = r->hw_value_short;
210 else
211 val = r->hw_value;
212
213 phy = val >> 8;
214 rate_idx = val & 0xff;
215 nss = 1;
216 }
217
218 rateval = FIELD_PREP(MT_RXWI_RATE_INDEX, rate_idx);
219 rateval |= FIELD_PREP(MT_RXWI_RATE_PHY, phy);
220 rateval |= FIELD_PREP(MT_RXWI_RATE_BW, bw);
221 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
222 rateval |= MT_RXWI_RATE_SGI;
223
224 *nss_val = nss;
225 return cpu_to_le16(rateval);
226 }
227
mt76x02_mac_wcid_set_rate(struct mt76x02_dev * dev,struct mt76_wcid * wcid,const struct ieee80211_tx_rate * rate)228 void mt76x02_mac_wcid_set_rate(struct mt76x02_dev *dev, struct mt76_wcid *wcid,
229 const struct ieee80211_tx_rate *rate)
230 {
231 s8 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
232 __le16 rateval;
233 u32 tx_info;
234 s8 nss;
235
236 rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss);
237 tx_info = FIELD_PREP(MT_WCID_TX_INFO_RATE, rateval) |
238 FIELD_PREP(MT_WCID_TX_INFO_NSS, nss) |
239 FIELD_PREP(MT_WCID_TX_INFO_TXPWR_ADJ, max_txpwr_adj) |
240 MT_WCID_TX_INFO_SET;
241 wcid->tx_info = tx_info;
242 }
243
mt76x02_mac_set_short_preamble(struct mt76x02_dev * dev,bool enable)244 void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable)
245 {
246 if (enable)
247 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
248 else
249 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
250 }
251
mt76x02_mac_load_tx_status(struct mt76x02_dev * dev,struct mt76x02_tx_status * stat)252 bool mt76x02_mac_load_tx_status(struct mt76x02_dev *dev,
253 struct mt76x02_tx_status *stat)
254 {
255 u32 stat1, stat2;
256
257 stat2 = mt76_rr(dev, MT_TX_STAT_FIFO_EXT);
258 stat1 = mt76_rr(dev, MT_TX_STAT_FIFO);
259
260 stat->valid = !!(stat1 & MT_TX_STAT_FIFO_VALID);
261 if (!stat->valid)
262 return false;
263
264 stat->success = !!(stat1 & MT_TX_STAT_FIFO_SUCCESS);
265 stat->aggr = !!(stat1 & MT_TX_STAT_FIFO_AGGR);
266 stat->ack_req = !!(stat1 & MT_TX_STAT_FIFO_ACKREQ);
267 stat->wcid = FIELD_GET(MT_TX_STAT_FIFO_WCID, stat1);
268 stat->rate = FIELD_GET(MT_TX_STAT_FIFO_RATE, stat1);
269
270 stat->retry = FIELD_GET(MT_TX_STAT_FIFO_EXT_RETRY, stat2);
271 stat->pktid = FIELD_GET(MT_TX_STAT_FIFO_EXT_PKTID, stat2);
272
273 trace_mac_txstat_fetch(dev, stat);
274
275 return true;
276 }
277
278 static int
mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate * txrate,u16 rate,enum nl80211_band band)279 mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate,
280 enum nl80211_band band)
281 {
282 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
283
284 txrate->idx = 0;
285 txrate->flags = 0;
286 txrate->count = 1;
287
288 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
289 case MT_PHY_TYPE_OFDM:
290 if (band == NL80211_BAND_2GHZ)
291 idx += 4;
292
293 txrate->idx = idx;
294 return 0;
295 case MT_PHY_TYPE_CCK:
296 if (idx >= 8)
297 idx -= 8;
298
299 txrate->idx = idx;
300 return 0;
301 case MT_PHY_TYPE_HT_GF:
302 txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD;
303 fallthrough;
304 case MT_PHY_TYPE_HT:
305 txrate->flags |= IEEE80211_TX_RC_MCS;
306 txrate->idx = idx;
307 break;
308 case MT_PHY_TYPE_VHT:
309 txrate->flags |= IEEE80211_TX_RC_VHT_MCS;
310 txrate->idx = idx;
311 break;
312 default:
313 return -EINVAL;
314 }
315
316 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) {
317 case MT_PHY_BW_20:
318 break;
319 case MT_PHY_BW_40:
320 txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
321 break;
322 case MT_PHY_BW_80:
323 txrate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
324 break;
325 default:
326 return -EINVAL;
327 }
328
329 if (rate & MT_RXWI_RATE_SGI)
330 txrate->flags |= IEEE80211_TX_RC_SHORT_GI;
331
332 return 0;
333 }
334
mt76x02_mac_write_txwi(struct mt76x02_dev * dev,struct mt76x02_txwi * txwi,struct sk_buff * skb,struct mt76_wcid * wcid,struct ieee80211_sta * sta,int len)335 void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi,
336 struct sk_buff *skb, struct mt76_wcid *wcid,
337 struct ieee80211_sta *sta, int len)
338 {
339 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
340 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
341 struct ieee80211_tx_rate *rate = &info->control.rates[0];
342 struct ieee80211_key_conf *key = info->control.hw_key;
343 u32 wcid_tx_info;
344 u16 rate_ht_mask = FIELD_PREP(MT_RXWI_RATE_PHY, BIT(1) | BIT(2));
345 u16 txwi_flags = 0;
346 u8 nss;
347 s8 txpwr_adj, max_txpwr_adj;
348 u8 ccmp_pn[8], nstreams = dev->chainmask & 0xf;
349
350 memset(txwi, 0, sizeof(*txwi));
351
352 mt76_tx_check_agg_ssn(sta, skb);
353
354 if (!info->control.hw_key && wcid && wcid->hw_key_idx != 0xff &&
355 ieee80211_has_protected(hdr->frame_control)) {
356 wcid = NULL;
357 ieee80211_get_tx_rates(info->control.vif, sta, skb,
358 info->control.rates, 1);
359 }
360
361 if (wcid)
362 txwi->wcid = wcid->idx;
363 else
364 txwi->wcid = 0xff;
365
366 if (wcid && wcid->sw_iv && key) {
367 u64 pn = atomic64_inc_return(&key->tx_pn);
368
369 ccmp_pn[0] = pn;
370 ccmp_pn[1] = pn >> 8;
371 ccmp_pn[2] = 0;
372 ccmp_pn[3] = 0x20 | (key->keyidx << 6);
373 ccmp_pn[4] = pn >> 16;
374 ccmp_pn[5] = pn >> 24;
375 ccmp_pn[6] = pn >> 32;
376 ccmp_pn[7] = pn >> 40;
377 txwi->iv = *((__le32 *)&ccmp_pn[0]);
378 txwi->eiv = *((__le32 *)&ccmp_pn[4]);
379 }
380
381 if (wcid && (rate->idx < 0 || !rate->count)) {
382 wcid_tx_info = wcid->tx_info;
383 txwi->rate = FIELD_GET(MT_WCID_TX_INFO_RATE, wcid_tx_info);
384 max_txpwr_adj = FIELD_GET(MT_WCID_TX_INFO_TXPWR_ADJ,
385 wcid_tx_info);
386 nss = FIELD_GET(MT_WCID_TX_INFO_NSS, wcid_tx_info);
387 } else {
388 txwi->rate = mt76x02_mac_tx_rate_val(dev, rate, &nss);
389 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
390 }
391
392 txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, dev->txpower_conf,
393 max_txpwr_adj);
394 txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj);
395
396 if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E4)
397 txwi->txstream = 0x13;
398 else if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E3 &&
399 !(txwi->rate & cpu_to_le16(rate_ht_mask)))
400 txwi->txstream = 0x93;
401
402 if (is_mt76x2(dev) && (info->flags & IEEE80211_TX_CTL_LDPC))
403 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_LDPC);
404 if ((info->flags & IEEE80211_TX_CTL_STBC) && nss == 1)
405 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_STBC);
406 if (nss > 1 && sta && sta->smps_mode == IEEE80211_SMPS_DYNAMIC)
407 txwi_flags |= MT_TXWI_FLAGS_MMPS;
408 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
409 txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ;
410 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
411 txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ;
412 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) {
413 u8 ba_size = IEEE80211_MIN_AMPDU_BUF;
414 u8 ampdu_density = sta->ht_cap.ampdu_density;
415
416 ba_size <<= sta->ht_cap.ampdu_factor;
417 ba_size = min_t(int, 63, ba_size - 1);
418 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
419 ba_size = 0;
420 txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size);
421
422 if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4)
423 ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
424
425 txwi_flags |= MT_TXWI_FLAGS_AMPDU |
426 FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, ampdu_density);
427 }
428
429 if (ieee80211_is_probe_resp(hdr->frame_control) ||
430 ieee80211_is_beacon(hdr->frame_control))
431 txwi_flags |= MT_TXWI_FLAGS_TS;
432
433 txwi->flags |= cpu_to_le16(txwi_flags);
434 txwi->len_ctl = cpu_to_le16(len);
435 }
436 EXPORT_SYMBOL_GPL(mt76x02_mac_write_txwi);
437
438 static void
mt76x02_tx_rate_fallback(struct ieee80211_tx_rate * rates,int idx,int phy)439 mt76x02_tx_rate_fallback(struct ieee80211_tx_rate *rates, int idx, int phy)
440 {
441 u8 mcs, nss;
442
443 if (!idx)
444 return;
445
446 rates += idx - 1;
447 rates[1] = rates[0];
448 switch (phy) {
449 case MT_PHY_TYPE_VHT:
450 mcs = ieee80211_rate_get_vht_mcs(rates);
451 nss = ieee80211_rate_get_vht_nss(rates);
452
453 if (mcs == 0)
454 nss = max_t(int, nss - 1, 1);
455 else
456 mcs--;
457
458 ieee80211_rate_set_vht(rates + 1, mcs, nss);
459 break;
460 case MT_PHY_TYPE_HT_GF:
461 case MT_PHY_TYPE_HT:
462 /* MCS 8 falls back to MCS 0 */
463 if (rates[0].idx == 8) {
464 rates[1].idx = 0;
465 break;
466 }
467 fallthrough;
468 default:
469 rates[1].idx = max_t(int, rates[0].idx - 1, 0);
470 break;
471 }
472 }
473
474 static void
mt76x02_mac_fill_tx_status(struct mt76x02_dev * dev,struct mt76x02_sta * msta,struct ieee80211_tx_info * info,struct mt76x02_tx_status * st,int n_frames)475 mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev, struct mt76x02_sta *msta,
476 struct ieee80211_tx_info *info,
477 struct mt76x02_tx_status *st, int n_frames)
478 {
479 struct ieee80211_tx_rate *rate = info->status.rates;
480 struct ieee80211_tx_rate last_rate;
481 u16 first_rate;
482 int retry = st->retry;
483 int phy;
484 int i;
485
486 if (!n_frames)
487 return;
488
489 phy = FIELD_GET(MT_RXWI_RATE_PHY, st->rate);
490
491 if (st->pktid & MT_PACKET_ID_HAS_RATE) {
492 first_rate = st->rate & ~MT_PKTID_RATE;
493 first_rate |= st->pktid & MT_PKTID_RATE;
494
495 mt76x02_mac_process_tx_rate(&rate[0], first_rate,
496 dev->mphy.chandef.chan->band);
497 } else if (rate[0].idx < 0) {
498 if (!msta)
499 return;
500
501 mt76x02_mac_process_tx_rate(&rate[0], msta->wcid.tx_info,
502 dev->mphy.chandef.chan->band);
503 }
504
505 mt76x02_mac_process_tx_rate(&last_rate, st->rate,
506 dev->mphy.chandef.chan->band);
507
508 for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {
509 retry--;
510 if (i + 1 == ARRAY_SIZE(info->status.rates)) {
511 info->status.rates[i] = last_rate;
512 info->status.rates[i].count = max_t(int, retry, 1);
513 break;
514 }
515
516 mt76x02_tx_rate_fallback(info->status.rates, i, phy);
517 if (info->status.rates[i].idx == last_rate.idx)
518 break;
519 }
520
521 if (i + 1 < ARRAY_SIZE(info->status.rates)) {
522 info->status.rates[i + 1].idx = -1;
523 info->status.rates[i + 1].count = 0;
524 }
525
526 info->status.ampdu_len = n_frames;
527 info->status.ampdu_ack_len = st->success ? n_frames : 0;
528
529 if (st->aggr)
530 info->flags |= IEEE80211_TX_CTL_AMPDU |
531 IEEE80211_TX_STAT_AMPDU;
532
533 if (!st->ack_req)
534 info->flags |= IEEE80211_TX_CTL_NO_ACK;
535 else if (st->success)
536 info->flags |= IEEE80211_TX_STAT_ACK;
537 }
538
mt76x02_send_tx_status(struct mt76x02_dev * dev,struct mt76x02_tx_status * stat,u8 * update)539 void mt76x02_send_tx_status(struct mt76x02_dev *dev,
540 struct mt76x02_tx_status *stat, u8 *update)
541 {
542 struct ieee80211_tx_info info = {};
543 struct ieee80211_tx_status status = {
544 .info = &info
545 };
546 static const u8 ac_to_tid[4] = {
547 [IEEE80211_AC_BE] = 0,
548 [IEEE80211_AC_BK] = 1,
549 [IEEE80211_AC_VI] = 4,
550 [IEEE80211_AC_VO] = 6
551 };
552 struct mt76_wcid *wcid = NULL;
553 struct mt76x02_sta *msta = NULL;
554 struct mt76_dev *mdev = &dev->mt76;
555 struct sk_buff_head list;
556 u32 duration = 0;
557 u8 cur_pktid;
558 u32 ac = 0;
559 int len = 0;
560
561 if (stat->pktid == MT_PACKET_ID_NO_ACK)
562 return;
563
564 rcu_read_lock();
565
566 if (stat->wcid < MT76x02_N_WCIDS)
567 wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]);
568
569 if (wcid && wcid->sta) {
570 void *priv;
571
572 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
573 status.sta = container_of(priv, struct ieee80211_sta,
574 drv_priv);
575 }
576
577 mt76_tx_status_lock(mdev, &list);
578
579 if (wcid) {
580 if (mt76_is_skb_pktid(stat->pktid))
581 status.skb = mt76_tx_status_skb_get(mdev, wcid,
582 stat->pktid, &list);
583 if (status.skb)
584 status.info = IEEE80211_SKB_CB(status.skb);
585 }
586
587 if (!status.skb && !(stat->pktid & MT_PACKET_ID_HAS_RATE)) {
588 mt76_tx_status_unlock(mdev, &list);
589 goto out;
590 }
591
592
593 if (msta && stat->aggr && !status.skb) {
594 u32 stat_val, stat_cache;
595
596 stat_val = stat->rate;
597 stat_val |= ((u32)stat->retry) << 16;
598 stat_cache = msta->status.rate;
599 stat_cache |= ((u32)msta->status.retry) << 16;
600
601 if (*update == 0 && stat_val == stat_cache &&
602 stat->wcid == msta->status.wcid && msta->n_frames < 32) {
603 msta->n_frames++;
604 mt76_tx_status_unlock(mdev, &list);
605 goto out;
606 }
607
608 cur_pktid = msta->status.pktid;
609 mt76x02_mac_fill_tx_status(dev, msta, status.info,
610 &msta->status, msta->n_frames);
611
612 msta->status = *stat;
613 msta->n_frames = 1;
614 *update = 0;
615 } else {
616 cur_pktid = stat->pktid;
617 mt76x02_mac_fill_tx_status(dev, msta, status.info, stat, 1);
618 *update = 1;
619 }
620
621 if (status.skb) {
622 info = *status.info;
623 len = status.skb->len;
624 ac = skb_get_queue_mapping(status.skb);
625 mt76_tx_status_skb_done(mdev, status.skb, &list);
626 } else if (msta) {
627 len = status.info->status.ampdu_len * ewma_pktlen_read(&msta->pktlen);
628 ac = FIELD_GET(MT_PKTID_AC, cur_pktid);
629 }
630
631 mt76_tx_status_unlock(mdev, &list);
632
633 if (!status.skb)
634 ieee80211_tx_status_ext(mt76_hw(dev), &status);
635
636 if (!len)
637 goto out;
638
639 duration = ieee80211_calc_tx_airtime(mt76_hw(dev), &info, len);
640
641 spin_lock_bh(&dev->mt76.cc_lock);
642 dev->tx_airtime += duration;
643 spin_unlock_bh(&dev->mt76.cc_lock);
644
645 if (msta)
646 ieee80211_sta_register_airtime(status.sta, ac_to_tid[ac], duration, 0);
647
648 out:
649 rcu_read_unlock();
650 }
651
652 static int
mt76x02_mac_process_rate(struct mt76x02_dev * dev,struct mt76_rx_status * status,u16 rate)653 mt76x02_mac_process_rate(struct mt76x02_dev *dev,
654 struct mt76_rx_status *status,
655 u16 rate)
656 {
657 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
658
659 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
660 case MT_PHY_TYPE_OFDM:
661 if (idx >= 8)
662 idx = 0;
663
664 if (status->band == NL80211_BAND_2GHZ)
665 idx += 4;
666
667 status->rate_idx = idx;
668 return 0;
669 case MT_PHY_TYPE_CCK:
670 if (idx >= 8) {
671 idx -= 8;
672 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
673 }
674
675 if (idx >= 4)
676 idx = 0;
677
678 status->rate_idx = idx;
679 return 0;
680 case MT_PHY_TYPE_HT_GF:
681 status->enc_flags |= RX_ENC_FLAG_HT_GF;
682 fallthrough;
683 case MT_PHY_TYPE_HT:
684 status->encoding = RX_ENC_HT;
685 status->rate_idx = idx;
686 break;
687 case MT_PHY_TYPE_VHT: {
688 u8 n_rxstream = dev->chainmask & 0xf;
689
690 status->encoding = RX_ENC_VHT;
691 status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx);
692 status->nss = min_t(u8, n_rxstream,
693 FIELD_GET(MT_RATE_INDEX_VHT_NSS, idx) + 1);
694 break;
695 }
696 default:
697 return -EINVAL;
698 }
699
700 if (rate & MT_RXWI_RATE_LDPC)
701 status->enc_flags |= RX_ENC_FLAG_LDPC;
702
703 if (rate & MT_RXWI_RATE_SGI)
704 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
705
706 if (rate & MT_RXWI_RATE_STBC)
707 status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT;
708
709 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) {
710 case MT_PHY_BW_20:
711 break;
712 case MT_PHY_BW_40:
713 status->bw = RATE_INFO_BW_40;
714 break;
715 case MT_PHY_BW_80:
716 status->bw = RATE_INFO_BW_80;
717 break;
718 default:
719 break;
720 }
721
722 return 0;
723 }
724
mt76x02_mac_setaddr(struct mt76x02_dev * dev,const u8 * addr)725 void mt76x02_mac_setaddr(struct mt76x02_dev *dev, const u8 *addr)
726 {
727 static const u8 null_addr[ETH_ALEN] = {};
728 int i;
729
730 ether_addr_copy(dev->mt76.macaddr, addr);
731
732 if (!is_valid_ether_addr(dev->mt76.macaddr)) {
733 eth_random_addr(dev->mt76.macaddr);
734 dev_info(dev->mt76.dev,
735 "Invalid MAC address, using random address %pM\n",
736 dev->mt76.macaddr);
737 }
738
739 mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mt76.macaddr));
740 mt76_wr(dev, MT_MAC_ADDR_DW1,
741 get_unaligned_le16(dev->mt76.macaddr + 4) |
742 FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff));
743
744 mt76_wr(dev, MT_MAC_BSSID_DW0,
745 get_unaligned_le32(dev->mt76.macaddr));
746 mt76_wr(dev, MT_MAC_BSSID_DW1,
747 get_unaligned_le16(dev->mt76.macaddr + 4) |
748 FIELD_PREP(MT_MAC_BSSID_DW1_MBSS_MODE, 3) | /* 8 APs + 8 STAs */
749 MT_MAC_BSSID_DW1_MBSS_LOCAL_BIT);
750 /* enable 7 additional beacon slots and control them with bypass mask */
751 mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N, 7);
752
753 for (i = 0; i < 16; i++)
754 mt76x02_mac_set_bssid(dev, i, null_addr);
755 }
756 EXPORT_SYMBOL_GPL(mt76x02_mac_setaddr);
757
758 static int
mt76x02_mac_get_rssi(struct mt76x02_dev * dev,s8 rssi,int chain)759 mt76x02_mac_get_rssi(struct mt76x02_dev *dev, s8 rssi, int chain)
760 {
761 struct mt76x02_rx_freq_cal *cal = &dev->cal.rx;
762
763 rssi += cal->rssi_offset[chain];
764 rssi -= cal->lna_gain;
765
766 return rssi;
767 }
768
mt76x02_mac_process_rx(struct mt76x02_dev * dev,struct sk_buff * skb,void * rxi)769 int mt76x02_mac_process_rx(struct mt76x02_dev *dev, struct sk_buff *skb,
770 void *rxi)
771 {
772 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
773 struct mt76x02_rxwi *rxwi = rxi;
774 struct mt76x02_sta *sta;
775 u32 rxinfo = le32_to_cpu(rxwi->rxinfo);
776 u32 ctl = le32_to_cpu(rxwi->ctl);
777 u16 rate = le16_to_cpu(rxwi->rate);
778 u16 tid_sn = le16_to_cpu(rxwi->tid_sn);
779 bool unicast = rxwi->rxinfo & cpu_to_le32(MT_RXINFO_UNICAST);
780 int pad_len = 0, nstreams = dev->chainmask & 0xf;
781 s8 signal;
782 u8 pn_len;
783 u8 wcid;
784 int len;
785
786 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
787 return -EINVAL;
788
789 if (rxinfo & MT_RXINFO_L2PAD)
790 pad_len += 2;
791
792 if (rxinfo & MT_RXINFO_DECRYPT) {
793 status->flag |= RX_FLAG_DECRYPTED;
794 status->flag |= RX_FLAG_MMIC_STRIPPED;
795 status->flag |= RX_FLAG_MIC_STRIPPED;
796 status->flag |= RX_FLAG_IV_STRIPPED;
797 }
798
799 wcid = FIELD_GET(MT_RXWI_CTL_WCID, ctl);
800 sta = mt76x02_rx_get_sta(&dev->mt76, wcid);
801 status->wcid = mt76x02_rx_get_sta_wcid(sta, unicast);
802
803 len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl);
804 pn_len = FIELD_GET(MT_RXINFO_PN_LEN, rxinfo);
805 if (pn_len) {
806 int offset = ieee80211_get_hdrlen_from_skb(skb) + pad_len;
807 u8 *data = skb->data + offset;
808
809 status->iv[0] = data[7];
810 status->iv[1] = data[6];
811 status->iv[2] = data[5];
812 status->iv[3] = data[4];
813 status->iv[4] = data[1];
814 status->iv[5] = data[0];
815
816 /*
817 * Driver CCMP validation can't deal with fragments.
818 * Let mac80211 take care of it.
819 */
820 if (rxinfo & MT_RXINFO_FRAG) {
821 status->flag &= ~RX_FLAG_IV_STRIPPED;
822 } else {
823 pad_len += pn_len << 2;
824 len -= pn_len << 2;
825 }
826 }
827
828 mt76x02_remove_hdr_pad(skb, pad_len);
829
830 if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL))
831 status->aggr = true;
832
833 if (rxinfo & MT_RXINFO_AMPDU) {
834 status->flag |= RX_FLAG_AMPDU_DETAILS;
835 status->ampdu_ref = dev->ampdu_ref;
836
837 /*
838 * When receiving an A-MPDU subframe and RSSI info is not valid,
839 * we can assume that more subframes belonging to the same A-MPDU
840 * are coming. The last one will have valid RSSI info
841 */
842 if (rxinfo & MT_RXINFO_RSSI) {
843 if (!++dev->ampdu_ref)
844 dev->ampdu_ref++;
845 }
846 }
847
848 if (WARN_ON_ONCE(len > skb->len))
849 return -EINVAL;
850
851 pskb_trim(skb, len);
852
853 status->chains = BIT(0);
854 signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0);
855 status->chain_signal[0] = signal;
856 if (nstreams > 1) {
857 status->chains |= BIT(1);
858 status->chain_signal[1] = mt76x02_mac_get_rssi(dev,
859 rxwi->rssi[1],
860 1);
861 signal = max_t(s8, signal, status->chain_signal[1]);
862 }
863 status->signal = signal;
864 status->freq = dev->mphy.chandef.chan->center_freq;
865 status->band = dev->mphy.chandef.chan->band;
866
867 status->tid = FIELD_GET(MT_RXWI_TID, tid_sn);
868 status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn);
869
870 return mt76x02_mac_process_rate(dev, status, rate);
871 }
872
mt76x02_mac_poll_tx_status(struct mt76x02_dev * dev,bool irq)873 void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq)
874 {
875 struct mt76x02_tx_status stat = {};
876 u8 update = 1;
877 bool ret;
878
879 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
880 return;
881
882 trace_mac_txstat_poll(dev);
883
884 while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) {
885 if (!spin_trylock(&dev->txstatus_fifo_lock))
886 break;
887
888 ret = mt76x02_mac_load_tx_status(dev, &stat);
889 spin_unlock(&dev->txstatus_fifo_lock);
890
891 if (!ret)
892 break;
893
894 if (!irq) {
895 mt76x02_send_tx_status(dev, &stat, &update);
896 continue;
897 }
898
899 kfifo_put(&dev->txstatus_fifo, stat);
900 }
901 }
902
mt76x02_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)903 void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
904 {
905 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
906 struct mt76x02_txwi *txwi;
907 u8 *txwi_ptr;
908
909 if (!e->txwi) {
910 dev_kfree_skb_any(e->skb);
911 return;
912 }
913
914 mt76x02_mac_poll_tx_status(dev, false);
915
916 txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi);
917 txwi = (struct mt76x02_txwi *)txwi_ptr;
918 trace_mac_txdone(mdev, txwi->wcid, txwi->pktid);
919
920 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
921 }
922 EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb);
923
mt76x02_mac_set_rts_thresh(struct mt76x02_dev * dev,u32 val)924 void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val)
925 {
926 u32 data = 0;
927
928 if (val != ~0)
929 data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) |
930 MT_PROT_CFG_RTS_THRESH;
931
932 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val);
933
934 mt76_rmw(dev, MT_CCK_PROT_CFG,
935 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
936 mt76_rmw(dev, MT_OFDM_PROT_CFG,
937 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
938 }
939
mt76x02_mac_set_tx_protection(struct mt76x02_dev * dev,bool legacy_prot,int ht_mode)940 void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot,
941 int ht_mode)
942 {
943 int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
944 bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
945 u32 prot[6];
946 u32 vht_prot[3];
947 int i;
948 u16 rts_thr;
949
950 for (i = 0; i < ARRAY_SIZE(prot); i++) {
951 prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4);
952 prot[i] &= ~MT_PROT_CFG_CTRL;
953 if (i >= 2)
954 prot[i] &= ~MT_PROT_CFG_RATE;
955 }
956
957 for (i = 0; i < ARRAY_SIZE(vht_prot); i++) {
958 vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4);
959 vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE);
960 }
961
962 rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH);
963
964 if (rts_thr != 0xffff)
965 prot[0] |= MT_PROT_CTRL_RTS_CTS;
966
967 if (legacy_prot) {
968 prot[1] |= MT_PROT_CTRL_CTS2SELF;
969
970 prot[2] |= MT_PROT_RATE_CCK_11;
971 prot[3] |= MT_PROT_RATE_CCK_11;
972 prot[4] |= MT_PROT_RATE_CCK_11;
973 prot[5] |= MT_PROT_RATE_CCK_11;
974
975 vht_prot[0] |= MT_PROT_RATE_CCK_11;
976 vht_prot[1] |= MT_PROT_RATE_CCK_11;
977 vht_prot[2] |= MT_PROT_RATE_CCK_11;
978 } else {
979 if (rts_thr != 0xffff)
980 prot[1] |= MT_PROT_CTRL_RTS_CTS;
981
982 prot[2] |= MT_PROT_RATE_OFDM_24;
983 prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
984 prot[4] |= MT_PROT_RATE_OFDM_24;
985 prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
986
987 vht_prot[0] |= MT_PROT_RATE_OFDM_24;
988 vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24;
989 vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24;
990 }
991
992 switch (mode) {
993 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
994 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
995 prot[2] |= MT_PROT_CTRL_RTS_CTS;
996 prot[3] |= MT_PROT_CTRL_RTS_CTS;
997 prot[4] |= MT_PROT_CTRL_RTS_CTS;
998 prot[5] |= MT_PROT_CTRL_RTS_CTS;
999 vht_prot[0] |= MT_PROT_CTRL_RTS_CTS;
1000 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1001 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1002 break;
1003 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
1004 prot[3] |= MT_PROT_CTRL_RTS_CTS;
1005 prot[5] |= MT_PROT_CTRL_RTS_CTS;
1006 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1007 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1008 break;
1009 }
1010
1011 if (non_gf) {
1012 prot[4] |= MT_PROT_CTRL_RTS_CTS;
1013 prot[5] |= MT_PROT_CTRL_RTS_CTS;
1014 }
1015
1016 for (i = 0; i < ARRAY_SIZE(prot); i++)
1017 mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
1018
1019 for (i = 0; i < ARRAY_SIZE(vht_prot); i++)
1020 mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]);
1021 }
1022
mt76x02_update_channel(struct mt76_dev * mdev)1023 void mt76x02_update_channel(struct mt76_dev *mdev)
1024 {
1025 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
1026 struct mt76_channel_state *state;
1027
1028 state = mdev->phy.chan_state;
1029 state->cc_busy += mt76_rr(dev, MT_CH_BUSY);
1030
1031 spin_lock_bh(&dev->mt76.cc_lock);
1032 state->cc_tx += dev->tx_airtime;
1033 dev->tx_airtime = 0;
1034 spin_unlock_bh(&dev->mt76.cc_lock);
1035 }
1036 EXPORT_SYMBOL_GPL(mt76x02_update_channel);
1037
mt76x02_check_mac_err(struct mt76x02_dev * dev)1038 static void mt76x02_check_mac_err(struct mt76x02_dev *dev)
1039 {
1040 u32 val = mt76_rr(dev, 0x10f4);
1041
1042 if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
1043 return;
1044
1045 dev_err(dev->mt76.dev, "mac specific condition occurred\n");
1046
1047 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
1048 udelay(10);
1049 mt76_wr(dev, MT_MAC_SYS_CTRL,
1050 MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX);
1051 }
1052
1053 static void
mt76x02_edcca_tx_enable(struct mt76x02_dev * dev,bool enable)1054 mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable)
1055 {
1056 if (enable) {
1057 u32 data;
1058
1059 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1060 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1061 /* enable pa-lna */
1062 data = mt76_rr(dev, MT_TX_PIN_CFG);
1063 data |= MT_TX_PIN_CFG_TXANT |
1064 MT_TX_PIN_CFG_RXANT |
1065 MT_TX_PIN_RFTR_EN |
1066 MT_TX_PIN_TRSW_EN;
1067 mt76_wr(dev, MT_TX_PIN_CFG, data);
1068 } else {
1069 mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1070 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1071 /* disable pa-lna */
1072 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT);
1073 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT);
1074 }
1075 dev->ed_tx_blocked = !enable;
1076 }
1077
mt76x02_edcca_init(struct mt76x02_dev * dev)1078 void mt76x02_edcca_init(struct mt76x02_dev *dev)
1079 {
1080 dev->ed_trigger = 0;
1081 dev->ed_silent = 0;
1082
1083 if (dev->ed_monitor) {
1084 struct ieee80211_channel *chan = dev->mphy.chandef.chan;
1085 u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20;
1086
1087 mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1088 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1089 mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0),
1090 ed_th << 8 | ed_th);
1091 mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN);
1092 } else {
1093 mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1094 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1095 if (is_mt76x2(dev)) {
1096 mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070);
1097 mt76_set(dev, MT_TXOP_HLDR_ET,
1098 MT_TXOP_HLDR_TX40M_BLK_EN);
1099 } else {
1100 mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464);
1101 mt76_clear(dev, MT_TXOP_HLDR_ET,
1102 MT_TXOP_HLDR_TX40M_BLK_EN);
1103 }
1104 }
1105 mt76x02_edcca_tx_enable(dev, true);
1106 dev->ed_monitor_learning = true;
1107
1108 /* clear previous CCA timer value */
1109 mt76_rr(dev, MT_ED_CCA_TIMER);
1110 dev->ed_time = ktime_get_boottime();
1111 }
1112 EXPORT_SYMBOL_GPL(mt76x02_edcca_init);
1113
1114 #define MT_EDCCA_TH 92
1115 #define MT_EDCCA_BLOCK_TH 2
1116 #define MT_EDCCA_LEARN_TH 50
1117 #define MT_EDCCA_LEARN_CCA 180
1118 #define MT_EDCCA_LEARN_TIMEOUT (20 * HZ)
1119
mt76x02_edcca_check(struct mt76x02_dev * dev)1120 static void mt76x02_edcca_check(struct mt76x02_dev *dev)
1121 {
1122 ktime_t cur_time;
1123 u32 active, val, busy;
1124
1125 cur_time = ktime_get_boottime();
1126 val = mt76_rr(dev, MT_ED_CCA_TIMER);
1127
1128 active = ktime_to_us(ktime_sub(cur_time, dev->ed_time));
1129 dev->ed_time = cur_time;
1130
1131 busy = (val * 100) / active;
1132 busy = min_t(u32, busy, 100);
1133
1134 if (busy > MT_EDCCA_TH) {
1135 dev->ed_trigger++;
1136 dev->ed_silent = 0;
1137 } else {
1138 dev->ed_silent++;
1139 dev->ed_trigger = 0;
1140 }
1141
1142 if (dev->cal.agc_lowest_gain &&
1143 dev->cal.false_cca > MT_EDCCA_LEARN_CCA &&
1144 dev->ed_trigger > MT_EDCCA_LEARN_TH) {
1145 dev->ed_monitor_learning = false;
1146 dev->ed_trigger_timeout = jiffies + 20 * HZ;
1147 } else if (!dev->ed_monitor_learning &&
1148 time_is_after_jiffies(dev->ed_trigger_timeout)) {
1149 dev->ed_monitor_learning = true;
1150 mt76x02_edcca_tx_enable(dev, true);
1151 }
1152
1153 if (dev->ed_monitor_learning)
1154 return;
1155
1156 if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked)
1157 mt76x02_edcca_tx_enable(dev, false);
1158 else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked)
1159 mt76x02_edcca_tx_enable(dev, true);
1160 }
1161
mt76x02_mac_work(struct work_struct * work)1162 void mt76x02_mac_work(struct work_struct *work)
1163 {
1164 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
1165 mt76.mac_work.work);
1166 int i, idx;
1167
1168 mutex_lock(&dev->mt76.mutex);
1169
1170 mt76_update_survey(&dev->mt76);
1171 for (i = 0, idx = 0; i < 16; i++) {
1172 u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i));
1173
1174 dev->mt76.aggr_stats[idx++] += val & 0xffff;
1175 dev->mt76.aggr_stats[idx++] += val >> 16;
1176 }
1177
1178 if (!dev->mt76.beacon_mask)
1179 mt76x02_check_mac_err(dev);
1180
1181 if (dev->ed_monitor)
1182 mt76x02_edcca_check(dev);
1183
1184 mutex_unlock(&dev->mt76.mutex);
1185
1186 mt76_tx_status_check(&dev->mt76, NULL, false);
1187
1188 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
1189 MT_MAC_WORK_INTERVAL);
1190 }
1191
mt76x02_mac_cc_reset(struct mt76x02_dev * dev)1192 void mt76x02_mac_cc_reset(struct mt76x02_dev *dev)
1193 {
1194 dev->mphy.survey_time = ktime_get_boottime();
1195
1196 mt76_wr(dev, MT_CH_TIME_CFG,
1197 MT_CH_TIME_CFG_TIMER_EN |
1198 MT_CH_TIME_CFG_TX_AS_BUSY |
1199 MT_CH_TIME_CFG_RX_AS_BUSY |
1200 MT_CH_TIME_CFG_NAV_AS_BUSY |
1201 MT_CH_TIME_CFG_EIFS_AS_BUSY |
1202 MT_CH_CCA_RC_EN |
1203 FIELD_PREP(MT_CH_TIME_CFG_CH_TIMER_CLR, 1));
1204
1205 /* channel cycle counters read-and-clear */
1206 mt76_rr(dev, MT_CH_BUSY);
1207 mt76_rr(dev, MT_CH_IDLE);
1208 }
1209 EXPORT_SYMBOL_GPL(mt76x02_mac_cc_reset);
1210
mt76x02_mac_set_bssid(struct mt76x02_dev * dev,u8 idx,const u8 * addr)1211 void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr)
1212 {
1213 idx &= 7;
1214 mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr));
1215 mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR,
1216 get_unaligned_le16(addr + 4));
1217 }
1218
