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 MT76X02_CIPHER_NONE;
38
39 if (key->keylen > 32)
40 return MT76X02_CIPHER_NONE;
41
42 memcpy(key_data, key->key, key->keylen);
43
44 switch (key->cipher) {
45 case WLAN_CIPHER_SUITE_WEP40:
46 return MT76X02_CIPHER_WEP40;
47 case WLAN_CIPHER_SUITE_WEP104:
48 return MT76X02_CIPHER_WEP104;
49 case WLAN_CIPHER_SUITE_TKIP:
50 return MT76X02_CIPHER_TKIP;
51 case WLAN_CIPHER_SUITE_CCMP:
52 return MT76X02_CIPHER_AES_CCMP;
53 default:
54 return MT76X02_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 == MT76X02_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 == MT76X02_CIPHER_TKIP) {
95 pn |= (iv >> 16) & 0xff;
96 pn |= (iv & 0xff) << 8;
97 } else if (cipher >= MT76X02_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 == MT76X02_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 >= MT76X02_CIPHER_TKIP) {
130 iv_data[3] |= 0x20;
131 put_unaligned_le32(pn >> 16, &iv_data[4]);
132 }
133
134 if (cipher == MT76X02_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 >= MT76X02_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 u16
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 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 u16 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, rateval;
346 u8 nss;
347 s8 txpwr_adj, max_txpwr_adj;
348 u8 ccmp_pn[8], nstreams = dev->mphy.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 rateval = 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 rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss);
389 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
390 }
391 txwi->rate = cpu_to_le16(rateval);
392
393 txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, dev->txpower_conf,
394 max_txpwr_adj);
395 txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj);
396
397 if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E4)
398 txwi->txstream = 0x13;
399 else if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E3 &&
400 !(txwi->rate & cpu_to_le16(rate_ht_mask)))
401 txwi->txstream = 0x93;
402
403 if (is_mt76x2(dev) && (info->flags & IEEE80211_TX_CTL_LDPC))
404 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_LDPC);
405 if ((info->flags & IEEE80211_TX_CTL_STBC) && nss == 1)
406 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_STBC);
407 if (nss > 1 && sta && sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC)
408 txwi_flags |= MT_TXWI_FLAGS_MMPS;
409 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
410 txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ;
411 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
412 txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ;
413 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) {
414 u8 ba_size = IEEE80211_MIN_AMPDU_BUF;
415 u8 ampdu_density = sta->deflink.ht_cap.ampdu_density;
416
417 ba_size <<= sta->deflink.ht_cap.ampdu_factor;
418 ba_size = min_t(int, 63, ba_size - 1);
419 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
420 ba_size = 0;
421 txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size);
422
423 if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4)
424 ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
425
426 txwi_flags |= MT_TXWI_FLAGS_AMPDU |
427 FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, ampdu_density);
428 }
429
430 if (ieee80211_is_probe_resp(hdr->frame_control) ||
431 ieee80211_is_beacon(hdr->frame_control))
432 txwi_flags |= MT_TXWI_FLAGS_TS;
433
434 txwi->flags |= cpu_to_le16(txwi_flags);
435 txwi->len_ctl = cpu_to_le16(len);
436 }
437 EXPORT_SYMBOL_GPL(mt76x02_mac_write_txwi);
438
439 static void
mt76x02_tx_rate_fallback(struct ieee80211_tx_rate * rates,int idx,int phy)440 mt76x02_tx_rate_fallback(struct ieee80211_tx_rate *rates, int idx, int phy)
441 {
442 u8 mcs, nss;
443
444 if (!idx)
445 return;
446
447 rates += idx - 1;
448 rates[1] = rates[0];
449 switch (phy) {
450 case MT_PHY_TYPE_VHT:
451 mcs = ieee80211_rate_get_vht_mcs(rates);
452 nss = ieee80211_rate_get_vht_nss(rates);
453
454 if (mcs == 0)
455 nss = max_t(int, nss - 1, 1);
456 else
457 mcs--;
458
459 ieee80211_rate_set_vht(rates + 1, mcs, nss);
460 break;
461 case MT_PHY_TYPE_HT_GF:
462 case MT_PHY_TYPE_HT:
463 /* MCS 8 falls back to MCS 0 */
464 if (rates[0].idx == 8) {
465 rates[1].idx = 0;
466 break;
467 }
468 fallthrough;
469 default:
470 rates[1].idx = max_t(int, rates[0].idx - 1, 0);
471 break;
472 }
473 }
474
475 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)476 mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev, struct mt76x02_sta *msta,
477 struct ieee80211_tx_info *info,
478 struct mt76x02_tx_status *st, int n_frames)
479 {
480 struct ieee80211_tx_rate *rate = info->status.rates;
481 struct ieee80211_tx_rate last_rate;
482 u16 first_rate;
483 int retry = st->retry;
484 int phy;
485 int i;
486
487 if (!n_frames)
488 return;
489
490 phy = FIELD_GET(MT_RXWI_RATE_PHY, st->rate);
491
492 if (st->pktid & MT_PACKET_ID_HAS_RATE) {
493 first_rate = st->rate & ~MT_PKTID_RATE;
494 first_rate |= st->pktid & MT_PKTID_RATE;
495
496 mt76x02_mac_process_tx_rate(&rate[0], first_rate,
497 dev->mphy.chandef.chan->band);
498 } else if (rate[0].idx < 0) {
499 if (!msta)
500 return;
501
502 mt76x02_mac_process_tx_rate(&rate[0], msta->wcid.tx_info,
503 dev->mphy.chandef.chan->band);
504 }
505
506 mt76x02_mac_process_tx_rate(&last_rate, st->rate,
507 dev->mphy.chandef.chan->band);
508
509 for (i = 0; i < ARRAY_SIZE(info->status.rates); i++) {
510 retry--;
511 if (i + 1 == ARRAY_SIZE(info->status.rates)) {
512 info->status.rates[i] = last_rate;
513 info->status.rates[i].count = max_t(int, retry, 1);
514 break;
515 }
516
517 mt76x02_tx_rate_fallback(info->status.rates, i, phy);
518 if (info->status.rates[i].idx == last_rate.idx)
519 break;
520 }
521
522 if (i + 1 < ARRAY_SIZE(info->status.rates)) {
523 info->status.rates[i + 1].idx = -1;
524 info->status.rates[i + 1].count = 0;
525 }
526
527 info->status.ampdu_len = n_frames;
528 info->status.ampdu_ack_len = st->success ? n_frames : 0;
529
530 if (st->aggr)
531 info->flags |= IEEE80211_TX_CTL_AMPDU |
532 IEEE80211_TX_STAT_AMPDU;
533
534 if (!st->ack_req)
535 info->flags |= IEEE80211_TX_CTL_NO_ACK;
536 else if (st->success)
537 info->flags |= IEEE80211_TX_STAT_ACK;
538 }
539
mt76x02_send_tx_status(struct mt76x02_dev * dev,struct mt76x02_tx_status * stat,u8 * update)540 void mt76x02_send_tx_status(struct mt76x02_dev *dev,
541 struct mt76x02_tx_status *stat, u8 *update)
542 {
543 struct ieee80211_tx_info info = {};
544 struct ieee80211_tx_status status = {
545 .info = &info
546 };
547 static const u8 ac_to_tid[4] = {
548 [IEEE80211_AC_BE] = 0,
549 [IEEE80211_AC_BK] = 1,
550 [IEEE80211_AC_VI] = 4,
551 [IEEE80211_AC_VO] = 6
552 };
553 struct mt76_wcid *wcid = NULL;
554 struct mt76x02_sta *msta = NULL;
555 struct mt76_dev *mdev = &dev->mt76;
556 struct sk_buff_head list;
557 u32 duration = 0;
558 u8 cur_pktid;
559 u32 ac = 0;
560 int len = 0;
561
562 if (stat->pktid == MT_PACKET_ID_NO_ACK)
563 return;
564
565 rcu_read_lock();
566
567 if (stat->wcid < MT76x02_N_WCIDS)
568 wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]);
569
570 if (wcid && wcid->sta) {
571 void *priv;
572
573 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
574 status.sta = container_of(priv, struct ieee80211_sta,
575 drv_priv);
576 }
577
578 mt76_tx_status_lock(mdev, &list);
579
580 if (wcid) {
581 if (mt76_is_skb_pktid(stat->pktid))
582 status.skb = mt76_tx_status_skb_get(mdev, wcid,
583 stat->pktid, &list);
584 if (status.skb)
585 status.info = IEEE80211_SKB_CB(status.skb);
586 }
587
588 if (!status.skb && !(stat->pktid & MT_PACKET_ID_HAS_RATE)) {
589 mt76_tx_status_unlock(mdev, &list);
590 goto out;
591 }
592
593
594 if (msta && stat->aggr && !status.skb) {
595 u32 stat_val, stat_cache;
596
597 stat_val = stat->rate;
598 stat_val |= ((u32)stat->retry) << 16;
599 stat_cache = msta->status.rate;
600 stat_cache |= ((u32)msta->status.retry) << 16;
601
602 if (*update == 0 && stat_val == stat_cache &&
603 stat->wcid == msta->status.wcid && msta->n_frames < 32) {
604 msta->n_frames++;
605 mt76_tx_status_unlock(mdev, &list);
606 goto out;
607 }
608
609 cur_pktid = msta->status.pktid;
610 mt76x02_mac_fill_tx_status(dev, msta, status.info,
611 &msta->status, msta->n_frames);
612
613 msta->status = *stat;
614 msta->n_frames = 1;
615 *update = 0;
616 } else {
617 cur_pktid = stat->pktid;
618 mt76x02_mac_fill_tx_status(dev, msta, status.info, stat, 1);
619 *update = 1;
620 }
621
622 if (status.skb) {
623 info = *status.info;
624 len = status.skb->len;
625 ac = skb_get_queue_mapping(status.skb);
626 mt76_tx_status_skb_done(mdev, status.skb, &list);
627 } else if (msta) {
628 len = status.info->status.ampdu_len * ewma_pktlen_read(&msta->pktlen);
629 ac = FIELD_GET(MT_PKTID_AC, cur_pktid);
630 }
631
632 mt76_tx_status_unlock(mdev, &list);
633
634 if (!status.skb) {
635 spin_lock_bh(&dev->mt76.rx_lock);
636 ieee80211_tx_status_ext(mt76_hw(dev), &status);
637 spin_unlock_bh(&dev->mt76.rx_lock);
638 }
639
640 if (!len)
641 goto out;
642
643 duration = ieee80211_calc_tx_airtime(mt76_hw(dev), &info, len);
644
645 spin_lock_bh(&dev->mt76.cc_lock);
646 dev->tx_airtime += duration;
647 spin_unlock_bh(&dev->mt76.cc_lock);
648
649 if (msta)
650 ieee80211_sta_register_airtime(status.sta, ac_to_tid[ac], duration, 0);
651
652 out:
653 rcu_read_unlock();
654 }
655
656 static int
mt76x02_mac_process_rate(struct mt76x02_dev * dev,struct mt76_rx_status * status,u16 rate)657 mt76x02_mac_process_rate(struct mt76x02_dev *dev,
658 struct mt76_rx_status *status,
659 u16 rate)
660 {
661 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
662
663 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
664 case MT_PHY_TYPE_OFDM:
665 if (idx >= 8)
666 idx = 0;
667
668 if (status->band == NL80211_BAND_2GHZ)
669 idx += 4;
670
671 status->rate_idx = idx;
672 return 0;
673 case MT_PHY_TYPE_CCK:
674 if (idx >= 8) {
675 idx -= 8;
676 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
677 }
678
679 if (idx >= 4)
680 idx = 0;
681
682 status->rate_idx = idx;
683 return 0;
684 case MT_PHY_TYPE_HT_GF:
685 status->enc_flags |= RX_ENC_FLAG_HT_GF;
686 fallthrough;
687 case MT_PHY_TYPE_HT:
688 status->encoding = RX_ENC_HT;
689 status->rate_idx = idx;
690 break;
691 case MT_PHY_TYPE_VHT: {
692 u8 n_rxstream = dev->mphy.chainmask & 0xf;
693
694 status->encoding = RX_ENC_VHT;
695 status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx);
696 status->nss = min_t(u8, n_rxstream,
697 FIELD_GET(MT_RATE_INDEX_VHT_NSS, idx) + 1);
698 break;
699 }
700 default:
701 return -EINVAL;
702 }
703
704 if (rate & MT_RXWI_RATE_LDPC)
705 status->enc_flags |= RX_ENC_FLAG_LDPC;
706
707 if (rate & MT_RXWI_RATE_SGI)
708 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
709
710 if (rate & MT_RXWI_RATE_STBC)
711 status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT;
712
713 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) {
714 case MT_PHY_BW_20:
715 break;
716 case MT_PHY_BW_40:
717 status->bw = RATE_INFO_BW_40;
718 break;
719 case MT_PHY_BW_80:
720 status->bw = RATE_INFO_BW_80;
721 break;
722 default:
723 break;
724 }
725
726 return 0;
727 }
728
mt76x02_mac_setaddr(struct mt76x02_dev * dev,const u8 * addr)729 void mt76x02_mac_setaddr(struct mt76x02_dev *dev, const u8 *addr)
730 {
731 static const u8 null_addr[ETH_ALEN] = {};
732 int i;
733
734 ether_addr_copy(dev->mphy.macaddr, addr);
735
736 if (!is_valid_ether_addr(dev->mphy.macaddr)) {
737 eth_random_addr(dev->mphy.macaddr);
738 dev_info(dev->mt76.dev,
739 "Invalid MAC address, using random address %pM\n",
740 dev->mphy.macaddr);
741 }
742
743 mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mphy.macaddr));
744 mt76_wr(dev, MT_MAC_ADDR_DW1,
745 get_unaligned_le16(dev->mphy.macaddr + 4) |
746 FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff));
747
748 mt76_wr(dev, MT_MAC_BSSID_DW0,
749 get_unaligned_le32(dev->mphy.macaddr));
750 mt76_wr(dev, MT_MAC_BSSID_DW1,
751 get_unaligned_le16(dev->mphy.macaddr + 4) |
752 FIELD_PREP(MT_MAC_BSSID_DW1_MBSS_MODE, 3) | /* 8 APs + 8 STAs */
753 MT_MAC_BSSID_DW1_MBSS_LOCAL_BIT);
754 /* enable 7 additional beacon slots and control them with bypass mask */
755 mt76_rmw_field(dev, MT_MAC_BSSID_DW1, MT_MAC_BSSID_DW1_MBEACON_N, 7);
756
757 for (i = 0; i < 16; i++)
758 mt76x02_mac_set_bssid(dev, i, null_addr);
759 }
760 EXPORT_SYMBOL_GPL(mt76x02_mac_setaddr);
761
762 static int
mt76x02_mac_get_rssi(struct mt76x02_dev * dev,s8 rssi,int chain)763 mt76x02_mac_get_rssi(struct mt76x02_dev *dev, s8 rssi, int chain)
764 {
765 struct mt76x02_rx_freq_cal *cal = &dev->cal.rx;
766
767 rssi += cal->rssi_offset[chain];
768 rssi -= cal->lna_gain;
769
770 return rssi;
771 }
772
mt76x02_mac_process_rx(struct mt76x02_dev * dev,struct sk_buff * skb,void * rxi)773 int mt76x02_mac_process_rx(struct mt76x02_dev *dev, struct sk_buff *skb,
774 void *rxi)
775 {
776 struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
777 struct ieee80211_hdr *hdr;
778 struct mt76x02_rxwi *rxwi = rxi;
779 struct mt76x02_sta *sta;
780 u32 rxinfo = le32_to_cpu(rxwi->rxinfo);
781 u32 ctl = le32_to_cpu(rxwi->ctl);
782 u16 rate = le16_to_cpu(rxwi->rate);
783 u16 tid_sn = le16_to_cpu(rxwi->tid_sn);
784 bool unicast = rxwi->rxinfo & cpu_to_le32(MT_RXINFO_UNICAST);
785 int pad_len = 0, nstreams = dev->mphy.chainmask & 0xf;
786 s8 signal;
787 u8 pn_len;
788 u8 wcid;
789 int len;
790
791 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
792 return -EINVAL;
793
794 if (rxinfo & MT_RXINFO_L2PAD)
795 pad_len += 2;
796
797 if (rxinfo & MT_RXINFO_DECRYPT) {
798 status->flag |= RX_FLAG_DECRYPTED;
799 status->flag |= RX_FLAG_MMIC_STRIPPED;
800 status->flag |= RX_FLAG_MIC_STRIPPED;
801 status->flag |= RX_FLAG_IV_STRIPPED;
802 }
803
804 wcid = FIELD_GET(MT_RXWI_CTL_WCID, ctl);
805 sta = mt76x02_rx_get_sta(&dev->mt76, wcid);
806 status->wcid = mt76x02_rx_get_sta_wcid(sta, unicast);
807
808 len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl);
809 pn_len = FIELD_GET(MT_RXINFO_PN_LEN, rxinfo);
810 if (pn_len) {
811 int offset = ieee80211_get_hdrlen_from_skb(skb) + pad_len;
812 u8 *data = skb->data + offset;
813
814 status->iv[0] = data[7];
815 status->iv[1] = data[6];
816 status->iv[2] = data[5];
817 status->iv[3] = data[4];
818 status->iv[4] = data[1];
819 status->iv[5] = data[0];
820
821 /*
822 * Driver CCMP validation can't deal with fragments.
823 * Let mac80211 take care of it.
824 */
825 if (rxinfo & MT_RXINFO_FRAG) {
826 status->flag &= ~RX_FLAG_IV_STRIPPED;
827 } else {
828 pad_len += pn_len << 2;
829 len -= pn_len << 2;
830 }
831 }
832
833 mt76x02_remove_hdr_pad(skb, pad_len);
834
835 if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL))
836 status->aggr = true;
837
838 if (rxinfo & MT_RXINFO_AMPDU) {
839 status->flag |= RX_FLAG_AMPDU_DETAILS;
840 status->ampdu_ref = dev->ampdu_ref;
841
842 /*
843 * When receiving an A-MPDU subframe and RSSI info is not valid,
844 * we can assume that more subframes belonging to the same A-MPDU
845 * are coming. The last one will have valid RSSI info
846 */
847 if (rxinfo & MT_RXINFO_RSSI) {
848 if (!++dev->ampdu_ref)
849 dev->ampdu_ref++;
850 }
851 }
852
853 if (WARN_ON_ONCE(len > skb->len))
854 return -EINVAL;
855
856 pskb_trim(skb, len);
857
858 status->chains = BIT(0);
859 signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0);
860 status->chain_signal[0] = signal;
861 if (nstreams > 1) {
862 status->chains |= BIT(1);
863 status->chain_signal[1] = mt76x02_mac_get_rssi(dev,
864 rxwi->rssi[1],
865 1);
866 }
867 status->freq = dev->mphy.chandef.chan->center_freq;
868 status->band = dev->mphy.chandef.chan->band;
869
870 hdr = (struct ieee80211_hdr *)skb->data;
871 status->qos_ctl = *ieee80211_get_qos_ctl(hdr);
872 status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn);
873
874 return mt76x02_mac_process_rate(dev, status, rate);
875 }
876
mt76x02_mac_poll_tx_status(struct mt76x02_dev * dev,bool irq)877 void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq)
878 {
879 struct mt76x02_tx_status stat = {};
880 u8 update = 1;
881 bool ret;
882
883 if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
884 return;
885
886 trace_mac_txstat_poll(dev);
887
888 while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) {
889 if (!spin_trylock(&dev->txstatus_fifo_lock))
890 break;
891
892 ret = mt76x02_mac_load_tx_status(dev, &stat);
893 spin_unlock(&dev->txstatus_fifo_lock);
894
895 if (!ret)
896 break;
897
898 if (!irq) {
899 mt76x02_send_tx_status(dev, &stat, &update);
900 continue;
901 }
902
903 kfifo_put(&dev->txstatus_fifo, stat);
904 }
905 }
906
mt76x02_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)907 void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
908 {
909 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
910 struct mt76x02_txwi *txwi;
911 u8 *txwi_ptr;
912
913 if (!e->txwi) {
914 dev_kfree_skb_any(e->skb);
915 return;
916 }
917
918 mt76x02_mac_poll_tx_status(dev, false);
919
920 txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi);
921 txwi = (struct mt76x02_txwi *)txwi_ptr;
922 trace_mac_txdone(mdev, txwi->wcid, txwi->pktid);
923
924 mt76_tx_complete_skb(mdev, e->wcid, e->skb);
925 }
926 EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb);
927
mt76x02_mac_set_rts_thresh(struct mt76x02_dev * dev,u32 val)928 void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val)
929 {
930 u32 data = 0;
931
932 if (val != ~0)
933 data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) |
934 MT_PROT_CFG_RTS_THRESH;
935
936 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val);
937
938 mt76_rmw(dev, MT_CCK_PROT_CFG,
939 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
940 mt76_rmw(dev, MT_OFDM_PROT_CFG,
941 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
942 }
943
mt76x02_mac_set_tx_protection(struct mt76x02_dev * dev,bool legacy_prot,int ht_mode)944 void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot,
945 int ht_mode)
946 {
947 int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
948 bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
949 u32 prot[6];
950 u32 vht_prot[3];
951 int i;
952 u16 rts_thr;
953
954 for (i = 0; i < ARRAY_SIZE(prot); i++) {
955 prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4);
956 prot[i] &= ~MT_PROT_CFG_CTRL;
957 if (i >= 2)
958 prot[i] &= ~MT_PROT_CFG_RATE;
959 }
960
961 for (i = 0; i < ARRAY_SIZE(vht_prot); i++) {
962 vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4);
963 vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE);
964 }
965
966 rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH);
967
968 if (rts_thr != 0xffff)
969 prot[0] |= MT_PROT_CTRL_RTS_CTS;
970
971 if (legacy_prot) {
972 prot[1] |= MT_PROT_CTRL_CTS2SELF;
973
974 prot[2] |= MT_PROT_RATE_CCK_11;
975 prot[3] |= MT_PROT_RATE_CCK_11;
976 prot[4] |= MT_PROT_RATE_CCK_11;
977 prot[5] |= MT_PROT_RATE_CCK_11;
978
979 vht_prot[0] |= MT_PROT_RATE_CCK_11;
980 vht_prot[1] |= MT_PROT_RATE_CCK_11;
981 vht_prot[2] |= MT_PROT_RATE_CCK_11;
982 } else {
983 if (rts_thr != 0xffff)
984 prot[1] |= MT_PROT_CTRL_RTS_CTS;
985
986 prot[2] |= MT_PROT_RATE_OFDM_24;
987 prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
988 prot[4] |= MT_PROT_RATE_OFDM_24;
989 prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
990
991 vht_prot[0] |= MT_PROT_RATE_OFDM_24;
992 vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24;
993 vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24;
994 }
995
996 switch (mode) {
997 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
998 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
999 prot[2] |= MT_PROT_CTRL_RTS_CTS;
1000 prot[3] |= MT_PROT_CTRL_RTS_CTS;
1001 prot[4] |= MT_PROT_CTRL_RTS_CTS;
1002 prot[5] |= MT_PROT_CTRL_RTS_CTS;
1003 vht_prot[0] |= MT_PROT_CTRL_RTS_CTS;
1004 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1005 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1006 break;
1007 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
1008 prot[3] |= MT_PROT_CTRL_RTS_CTS;
1009 prot[5] |= MT_PROT_CTRL_RTS_CTS;
1010 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1011 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1012 break;
1013 }
1014
1015 if (non_gf) {
1016 prot[4] |= MT_PROT_CTRL_RTS_CTS;
1017 prot[5] |= MT_PROT_CTRL_RTS_CTS;
1018 }
1019
1020 for (i = 0; i < ARRAY_SIZE(prot); i++)
1021 mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
1022
1023 for (i = 0; i < ARRAY_SIZE(vht_prot); i++)
1024 mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]);
1025 }
1026
mt76x02_update_channel(struct mt76_phy * mphy)1027 void mt76x02_update_channel(struct mt76_phy *mphy)
1028 {
1029 struct mt76x02_dev *dev = container_of(mphy->dev, struct mt76x02_dev, mt76);
1030 struct mt76_channel_state *state;
1031
1032 state = mphy->chan_state;
1033 state->cc_busy += mt76_rr(dev, MT_CH_BUSY);
1034
1035 spin_lock_bh(&dev->mt76.cc_lock);
1036 state->cc_tx += dev->tx_airtime;
1037 dev->tx_airtime = 0;
1038 spin_unlock_bh(&dev->mt76.cc_lock);
1039 }
1040 EXPORT_SYMBOL_GPL(mt76x02_update_channel);
1041
mt76x02_check_mac_err(struct mt76x02_dev * dev)1042 static void mt76x02_check_mac_err(struct mt76x02_dev *dev)
1043 {
1044 if (dev->mt76.beacon_mask) {
1045 if (mt76_rr(dev, MT_TX_STA_0) & MT_TX_STA_0_BEACONS) {
1046 dev->beacon_hang_check = 0;
1047 return;
1048 }
1049
1050 if (dev->beacon_hang_check < 10)
1051 return;
1052
1053 } else {
1054 u32 val = mt76_rr(dev, 0x10f4);
1055 if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
1056 return;
1057 }
1058
1059 dev_err(dev->mt76.dev, "MAC error detected\n");
1060
1061 mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
1062 if (!mt76x02_wait_for_txrx_idle(&dev->mt76)) {
1063 dev_err(dev->mt76.dev, "MAC stop failed\n");
1064 goto out;
1065 }
1066
1067 dev->beacon_hang_check = 0;
1068 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
1069 udelay(10);
1070
1071 out:
1072 mt76_wr(dev, MT_MAC_SYS_CTRL,
1073 MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX);
1074 }
1075
1076 static void
mt76x02_edcca_tx_enable(struct mt76x02_dev * dev,bool enable)1077 mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable)
1078 {
1079 if (enable) {
1080 u32 data;
1081
1082 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1083 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1084 /* enable pa-lna */
1085 data = mt76_rr(dev, MT_TX_PIN_CFG);
1086 data |= MT_TX_PIN_CFG_TXANT |
1087 MT_TX_PIN_CFG_RXANT |
1088 MT_TX_PIN_RFTR_EN |
1089 MT_TX_PIN_TRSW_EN;
1090 mt76_wr(dev, MT_TX_PIN_CFG, data);
1091 } else {
1092 mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1093 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1094 /* disable pa-lna */
1095 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT);
1096 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT);
1097 }
1098 dev->ed_tx_blocked = !enable;
1099 }
1100
mt76x02_edcca_init(struct mt76x02_dev * dev)1101 void mt76x02_edcca_init(struct mt76x02_dev *dev)
1102 {
1103 dev->ed_trigger = 0;
1104 dev->ed_silent = 0;
1105
1106 if (dev->ed_monitor) {
1107 struct ieee80211_channel *chan = dev->mphy.chandef.chan;
1108 u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20;
1109
1110 mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1111 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1112 mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0),
1113 ed_th << 8 | ed_th);
1114 mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN);
1115 } else {
1116 mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1117 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1118 if (is_mt76x2(dev)) {
1119 mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070);
1120 mt76_set(dev, MT_TXOP_HLDR_ET,
1121 MT_TXOP_HLDR_TX40M_BLK_EN);
1122 } else {
1123 mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464);
1124 mt76_clear(dev, MT_TXOP_HLDR_ET,
1125 MT_TXOP_HLDR_TX40M_BLK_EN);
1126 }
1127 }
1128 mt76x02_edcca_tx_enable(dev, true);
1129 dev->ed_monitor_learning = true;
1130
1131 /* clear previous CCA timer value */
1132 mt76_rr(dev, MT_ED_CCA_TIMER);
1133 dev->ed_time = ktime_get_boottime();
1134 }
1135 EXPORT_SYMBOL_GPL(mt76x02_edcca_init);
1136
1137 #define MT_EDCCA_TH 92
1138 #define MT_EDCCA_BLOCK_TH 2
1139 #define MT_EDCCA_LEARN_TH 50
1140 #define MT_EDCCA_LEARN_CCA 180
1141 #define MT_EDCCA_LEARN_TIMEOUT (20 * HZ)
1142
mt76x02_edcca_check(struct mt76x02_dev * dev)1143 static void mt76x02_edcca_check(struct mt76x02_dev *dev)
1144 {
1145 ktime_t cur_time;
1146 u32 active, val, busy;
1147
1148 cur_time = ktime_get_boottime();
1149 val = mt76_rr(dev, MT_ED_CCA_TIMER);
1150
1151 active = ktime_to_us(ktime_sub(cur_time, dev->ed_time));
1152 dev->ed_time = cur_time;
1153
1154 busy = (val * 100) / active;
1155 busy = min_t(u32, busy, 100);
1156
1157 if (busy > MT_EDCCA_TH) {
1158 dev->ed_trigger++;
1159 dev->ed_silent = 0;
1160 } else {
1161 dev->ed_silent++;
1162 dev->ed_trigger = 0;
1163 }
1164
1165 if (dev->cal.agc_lowest_gain &&
1166 dev->cal.false_cca > MT_EDCCA_LEARN_CCA &&
1167 dev->ed_trigger > MT_EDCCA_LEARN_TH) {
1168 dev->ed_monitor_learning = false;
1169 dev->ed_trigger_timeout = jiffies + 20 * HZ;
1170 } else if (!dev->ed_monitor_learning &&
1171 time_is_after_jiffies(dev->ed_trigger_timeout)) {
1172 dev->ed_monitor_learning = true;
1173 mt76x02_edcca_tx_enable(dev, true);
1174 }
1175
1176 if (dev->ed_monitor_learning)
1177 return;
1178
1179 if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked)
1180 mt76x02_edcca_tx_enable(dev, false);
1181 else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked)
1182 mt76x02_edcca_tx_enable(dev, true);
1183 }
1184
mt76x02_mac_work(struct work_struct * work)1185 void mt76x02_mac_work(struct work_struct *work)
1186 {
1187 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
1188 mphy.mac_work.work);
1189 int i, idx;
1190
1191 mutex_lock(&dev->mt76.mutex);
1192
1193 mt76_update_survey(&dev->mphy);
1194 for (i = 0, idx = 0; i < 16; i++) {
1195 u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i));
1196
1197 dev->mt76.aggr_stats[idx++] += val & 0xffff;
1198 dev->mt76.aggr_stats[idx++] += val >> 16;
1199 }
1200
1201 mt76x02_check_mac_err(dev);
1202
1203 if (dev->ed_monitor)
1204 mt76x02_edcca_check(dev);
1205
1206 mutex_unlock(&dev->mt76.mutex);
1207
1208 mt76_tx_status_check(&dev->mt76, false);
1209
1210 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
1211 MT_MAC_WORK_INTERVAL);
1212 }
1213
mt76x02_mac_cc_reset(struct mt76x02_dev * dev)1214 void mt76x02_mac_cc_reset(struct mt76x02_dev *dev)
1215 {
1216 dev->mphy.survey_time = ktime_get_boottime();
1217
1218 mt76_wr(dev, MT_CH_TIME_CFG,
1219 MT_CH_TIME_CFG_TIMER_EN |
1220 MT_CH_TIME_CFG_TX_AS_BUSY |
1221 MT_CH_TIME_CFG_RX_AS_BUSY |
1222 MT_CH_TIME_CFG_NAV_AS_BUSY |
1223 MT_CH_TIME_CFG_EIFS_AS_BUSY |
1224 MT_CH_CCA_RC_EN |
1225 FIELD_PREP(MT_CH_TIME_CFG_CH_TIMER_CLR, 1));
1226
1227 /* channel cycle counters read-and-clear */
1228 mt76_rr(dev, MT_CH_BUSY);
1229 mt76_rr(dev, MT_CH_IDLE);
1230 }
1231 EXPORT_SYMBOL_GPL(mt76x02_mac_cc_reset);
1232
mt76x02_mac_set_bssid(struct mt76x02_dev * dev,u8 idx,const u8 * addr)1233 void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr)
1234 {
1235 idx &= 7;
1236 mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr));
1237 mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR,
1238 get_unaligned_le16(addr + 4));
1239 }
1240