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->mphy.aggr_stats, 0, sizeof(dev->mphy.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 	if (pskb_trim(skb, len))
857 		return -EINVAL;
858 
859 	status->chains = BIT(0);
860 	signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0);
861 	status->chain_signal[0] = signal;
862 	if (nstreams > 1) {
863 		status->chains |= BIT(1);
864 		status->chain_signal[1] = mt76x02_mac_get_rssi(dev,
865 							       rxwi->rssi[1],
866 							       1);
867 	}
868 	status->freq = dev->mphy.chandef.chan->center_freq;
869 	status->band = dev->mphy.chandef.chan->band;
870 
871 	hdr = (struct ieee80211_hdr *)skb->data;
872 	status->qos_ctl = *ieee80211_get_qos_ctl(hdr);
873 	status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn);
874 
875 	return mt76x02_mac_process_rate(dev, status, rate);
876 }
877 
mt76x02_mac_poll_tx_status(struct mt76x02_dev * dev,bool irq)878 void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq)
879 {
880 	struct mt76x02_tx_status stat = {};
881 	u8 update = 1;
882 	bool ret;
883 
884 	if (!test_bit(MT76_STATE_RUNNING, &dev->mphy.state))
885 		return;
886 
887 	trace_mac_txstat_poll(dev);
888 
889 	while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) {
890 		if (!spin_trylock(&dev->txstatus_fifo_lock))
891 			break;
892 
893 		ret = mt76x02_mac_load_tx_status(dev, &stat);
894 		spin_unlock(&dev->txstatus_fifo_lock);
895 
896 		if (!ret)
897 			break;
898 
899 		if (!irq) {
900 			mt76x02_send_tx_status(dev, &stat, &update);
901 			continue;
902 		}
903 
904 		kfifo_put(&dev->txstatus_fifo, stat);
905 	}
906 }
907 
mt76x02_tx_complete_skb(struct mt76_dev * mdev,struct mt76_queue_entry * e)908 void mt76x02_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
909 {
910 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
911 	struct mt76x02_txwi *txwi;
912 	u8 *txwi_ptr;
913 
914 	if (!e->txwi) {
915 		dev_kfree_skb_any(e->skb);
916 		return;
917 	}
918 
919 	mt76x02_mac_poll_tx_status(dev, false);
920 
921 	txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi);
922 	txwi = (struct mt76x02_txwi *)txwi_ptr;
923 	trace_mac_txdone(mdev, txwi->wcid, txwi->pktid);
924 
925 	mt76_tx_complete_skb(mdev, e->wcid, e->skb);
926 }
927 EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb);
928 
mt76x02_mac_set_rts_thresh(struct mt76x02_dev * dev,u32 val)929 void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val)
930 {
931 	u32 data = 0;
932 
933 	if (val != ~0)
934 		data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) |
935 		       MT_PROT_CFG_RTS_THRESH;
936 
937 	mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val);
938 
939 	mt76_rmw(dev, MT_CCK_PROT_CFG,
940 		 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
941 	mt76_rmw(dev, MT_OFDM_PROT_CFG,
942 		 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
943 }
944 
mt76x02_mac_set_tx_protection(struct mt76x02_dev * dev,bool legacy_prot,int ht_mode)945 void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot,
946 				   int ht_mode)
947 {
948 	int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
949 	bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
950 	u32 prot[6];
951 	u32 vht_prot[3];
952 	int i;
953 	u16 rts_thr;
954 
955 	for (i = 0; i < ARRAY_SIZE(prot); i++) {
956 		prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4);
957 		prot[i] &= ~MT_PROT_CFG_CTRL;
958 		if (i >= 2)
959 			prot[i] &= ~MT_PROT_CFG_RATE;
960 	}
961 
962 	for (i = 0; i < ARRAY_SIZE(vht_prot); i++) {
963 		vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4);
964 		vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE);
965 	}
966 
967 	rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH);
968 
969 	if (rts_thr != 0xffff)
970 		prot[0] |= MT_PROT_CTRL_RTS_CTS;
971 
972 	if (legacy_prot) {
973 		prot[1] |= MT_PROT_CTRL_CTS2SELF;
974 
975 		prot[2] |= MT_PROT_RATE_CCK_11;
976 		prot[3] |= MT_PROT_RATE_CCK_11;
977 		prot[4] |= MT_PROT_RATE_CCK_11;
978 		prot[5] |= MT_PROT_RATE_CCK_11;
979 
980 		vht_prot[0] |= MT_PROT_RATE_CCK_11;
981 		vht_prot[1] |= MT_PROT_RATE_CCK_11;
982 		vht_prot[2] |= MT_PROT_RATE_CCK_11;
983 	} else {
984 		if (rts_thr != 0xffff)
985 			prot[1] |= MT_PROT_CTRL_RTS_CTS;
986 
987 		prot[2] |= MT_PROT_RATE_OFDM_24;
988 		prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
989 		prot[4] |= MT_PROT_RATE_OFDM_24;
990 		prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
991 
992 		vht_prot[0] |= MT_PROT_RATE_OFDM_24;
993 		vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24;
994 		vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24;
995 	}
996 
997 	switch (mode) {
998 	case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
999 	case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
1000 		prot[2] |= MT_PROT_CTRL_RTS_CTS;
1001 		prot[3] |= MT_PROT_CTRL_RTS_CTS;
1002 		prot[4] |= MT_PROT_CTRL_RTS_CTS;
1003 		prot[5] |= MT_PROT_CTRL_RTS_CTS;
1004 		vht_prot[0] |= MT_PROT_CTRL_RTS_CTS;
1005 		vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1006 		vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1007 		break;
1008 	case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
1009 		prot[3] |= MT_PROT_CTRL_RTS_CTS;
1010 		prot[5] |= MT_PROT_CTRL_RTS_CTS;
1011 		vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
1012 		vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
1013 		break;
1014 	}
1015 
1016 	if (non_gf) {
1017 		prot[4] |= MT_PROT_CTRL_RTS_CTS;
1018 		prot[5] |= MT_PROT_CTRL_RTS_CTS;
1019 	}
1020 
1021 	for (i = 0; i < ARRAY_SIZE(prot); i++)
1022 		mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
1023 
1024 	for (i = 0; i < ARRAY_SIZE(vht_prot); i++)
1025 		mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]);
1026 }
1027 
mt76x02_update_channel(struct mt76_phy * mphy)1028 void mt76x02_update_channel(struct mt76_phy *mphy)
1029 {
1030 	struct mt76x02_dev *dev = container_of(mphy->dev, struct mt76x02_dev, mt76);
1031 	struct mt76_channel_state *state;
1032 
1033 	state = mphy->chan_state;
1034 	state->cc_busy += mt76_rr(dev, MT_CH_BUSY);
1035 
1036 	spin_lock_bh(&dev->mt76.cc_lock);
1037 	state->cc_tx += dev->tx_airtime;
1038 	dev->tx_airtime = 0;
1039 	spin_unlock_bh(&dev->mt76.cc_lock);
1040 }
1041 EXPORT_SYMBOL_GPL(mt76x02_update_channel);
1042 
mt76x02_check_mac_err(struct mt76x02_dev * dev)1043 static void mt76x02_check_mac_err(struct mt76x02_dev *dev)
1044 {
1045 	if (dev->mt76.beacon_mask) {
1046 		if (mt76_rr(dev, MT_TX_STA_0) & MT_TX_STA_0_BEACONS) {
1047 			dev->beacon_hang_check = 0;
1048 			return;
1049 		}
1050 
1051 		if (dev->beacon_hang_check < 10)
1052 			return;
1053 
1054 	} else {
1055 		u32 val = mt76_rr(dev, 0x10f4);
1056 		if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
1057 			return;
1058 	}
1059 
1060 	dev_err(dev->mt76.dev, "MAC error detected\n");
1061 
1062 	mt76_wr(dev, MT_MAC_SYS_CTRL, 0);
1063 	if (!mt76x02_wait_for_txrx_idle(&dev->mt76)) {
1064 		dev_err(dev->mt76.dev, "MAC stop failed\n");
1065 		goto out;
1066 	}
1067 
1068 	dev->beacon_hang_check = 0;
1069 	mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
1070 	udelay(10);
1071 
1072 out:
1073 	mt76_wr(dev, MT_MAC_SYS_CTRL,
1074 		MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX);
1075 }
1076 
1077 static void
mt76x02_edcca_tx_enable(struct mt76x02_dev * dev,bool enable)1078 mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable)
1079 {
1080 	if (enable) {
1081 		u32 data;
1082 
1083 		mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1084 		mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1085 		/* enable pa-lna */
1086 		data = mt76_rr(dev, MT_TX_PIN_CFG);
1087 		data |= MT_TX_PIN_CFG_TXANT |
1088 			MT_TX_PIN_CFG_RXANT |
1089 			MT_TX_PIN_RFTR_EN |
1090 			MT_TX_PIN_TRSW_EN;
1091 		mt76_wr(dev, MT_TX_PIN_CFG, data);
1092 	} else {
1093 		mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
1094 		mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
1095 		/* disable pa-lna */
1096 		mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT);
1097 		mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT);
1098 	}
1099 	dev->ed_tx_blocked = !enable;
1100 }
1101 
mt76x02_edcca_init(struct mt76x02_dev * dev)1102 void mt76x02_edcca_init(struct mt76x02_dev *dev)
1103 {
1104 	dev->ed_trigger = 0;
1105 	dev->ed_silent = 0;
1106 
1107 	if (dev->ed_monitor) {
1108 		struct ieee80211_channel *chan = dev->mphy.chandef.chan;
1109 		u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20;
1110 
1111 		mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1112 		mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1113 		mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0),
1114 			 ed_th << 8 | ed_th);
1115 		mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN);
1116 	} else {
1117 		mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
1118 		mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
1119 		if (is_mt76x2(dev)) {
1120 			mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070);
1121 			mt76_set(dev, MT_TXOP_HLDR_ET,
1122 				 MT_TXOP_HLDR_TX40M_BLK_EN);
1123 		} else {
1124 			mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464);
1125 			mt76_clear(dev, MT_TXOP_HLDR_ET,
1126 				   MT_TXOP_HLDR_TX40M_BLK_EN);
1127 		}
1128 	}
1129 	mt76x02_edcca_tx_enable(dev, true);
1130 	dev->ed_monitor_learning = true;
1131 
1132 	/* clear previous CCA timer value */
1133 	mt76_rr(dev, MT_ED_CCA_TIMER);
1134 	dev->ed_time = ktime_get_boottime();
1135 }
1136 EXPORT_SYMBOL_GPL(mt76x02_edcca_init);
1137 
1138 #define MT_EDCCA_TH		92
1139 #define MT_EDCCA_BLOCK_TH	2
1140 #define MT_EDCCA_LEARN_TH	50
1141 #define MT_EDCCA_LEARN_CCA	180
1142 #define MT_EDCCA_LEARN_TIMEOUT	(20 * HZ)
1143 
mt76x02_edcca_check(struct mt76x02_dev * dev)1144 static void mt76x02_edcca_check(struct mt76x02_dev *dev)
1145 {
1146 	ktime_t cur_time;
1147 	u32 active, val, busy;
1148 
1149 	cur_time = ktime_get_boottime();
1150 	val = mt76_rr(dev, MT_ED_CCA_TIMER);
1151 
1152 	active = ktime_to_us(ktime_sub(cur_time, dev->ed_time));
1153 	dev->ed_time = cur_time;
1154 
1155 	busy = (val * 100) / active;
1156 	busy = min_t(u32, busy, 100);
1157 
1158 	if (busy > MT_EDCCA_TH) {
1159 		dev->ed_trigger++;
1160 		dev->ed_silent = 0;
1161 	} else {
1162 		dev->ed_silent++;
1163 		dev->ed_trigger = 0;
1164 	}
1165 
1166 	if (dev->cal.agc_lowest_gain &&
1167 	    dev->cal.false_cca > MT_EDCCA_LEARN_CCA &&
1168 	    dev->ed_trigger > MT_EDCCA_LEARN_TH) {
1169 		dev->ed_monitor_learning = false;
1170 		dev->ed_trigger_timeout = jiffies + 20 * HZ;
1171 	} else if (!dev->ed_monitor_learning &&
1172 		   time_is_after_jiffies(dev->ed_trigger_timeout)) {
1173 		dev->ed_monitor_learning = true;
1174 		mt76x02_edcca_tx_enable(dev, true);
1175 	}
1176 
1177 	if (dev->ed_monitor_learning)
1178 		return;
1179 
1180 	if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked)
1181 		mt76x02_edcca_tx_enable(dev, false);
1182 	else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked)
1183 		mt76x02_edcca_tx_enable(dev, true);
1184 }
1185 
mt76x02_mac_work(struct work_struct * work)1186 void mt76x02_mac_work(struct work_struct *work)
1187 {
1188 	struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
1189 					       mphy.mac_work.work);
1190 	int i, idx;
1191 
1192 	mutex_lock(&dev->mt76.mutex);
1193 
1194 	mt76_update_survey(&dev->mphy);
1195 	for (i = 0, idx = 0; i < 16; i++) {
1196 		u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i));
1197 
1198 		dev->mphy.aggr_stats[idx++] += val & 0xffff;
1199 		dev->mphy.aggr_stats[idx++] += val >> 16;
1200 	}
1201 
1202 	mt76x02_check_mac_err(dev);
1203 
1204 	if (dev->ed_monitor)
1205 		mt76x02_edcca_check(dev);
1206 
1207 	mutex_unlock(&dev->mt76.mutex);
1208 
1209 	mt76_tx_status_check(&dev->mt76, false);
1210 
1211 	ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
1212 				     MT_MAC_WORK_INTERVAL);
1213 }
1214 
mt76x02_mac_cc_reset(struct mt76x02_dev * dev)1215 void mt76x02_mac_cc_reset(struct mt76x02_dev *dev)
1216 {
1217 	dev->mphy.survey_time = ktime_get_boottime();
1218 
1219 	mt76_wr(dev, MT_CH_TIME_CFG,
1220 		MT_CH_TIME_CFG_TIMER_EN |
1221 		MT_CH_TIME_CFG_TX_AS_BUSY |
1222 		MT_CH_TIME_CFG_RX_AS_BUSY |
1223 		MT_CH_TIME_CFG_NAV_AS_BUSY |
1224 		MT_CH_TIME_CFG_EIFS_AS_BUSY |
1225 		MT_CH_CCA_RC_EN |
1226 		FIELD_PREP(MT_CH_TIME_CFG_CH_TIMER_CLR, 1));
1227 
1228 	/* channel cycle counters read-and-clear */
1229 	mt76_rr(dev, MT_CH_BUSY);
1230 	mt76_rr(dev, MT_CH_IDLE);
1231 }
1232 EXPORT_SYMBOL_GPL(mt76x02_mac_cc_reset);
1233 
mt76x02_mac_set_bssid(struct mt76x02_dev * dev,u8 idx,const u8 * addr)1234 void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr)
1235 {
1236 	idx &= 7;
1237 	mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr));
1238 	mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR,
1239 		       get_unaligned_le16(addr + 4));
1240 }
1241