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dmaengine: imx-sdma: Let the core do the device node validation
[linux/fpc-iii.git] / drivers / net / wireless / mediatek / mt76 / mt76x02_mac.c
blob56510a1a843a8aaf787ad0deb4c63f6f15c59a77
1 /*
2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include "mt76x02.h"
19 #include "mt76x02_trace.h"
20
21 static enum mt76x02_cipher_type
22 mt76x02_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
23 {
24 memset(key_data, 0, 32);
25 if (!key)
26 return MT_CIPHER_NONE;
27
28 if (key->keylen > 32)
29 return MT_CIPHER_NONE;
30
31 memcpy(key_data, key->key, key->keylen);
32
33 switch (key->cipher) {
34 case WLAN_CIPHER_SUITE_WEP40:
35 return MT_CIPHER_WEP40;
36 case WLAN_CIPHER_SUITE_WEP104:
37 return MT_CIPHER_WEP104;
38 case WLAN_CIPHER_SUITE_TKIP:
39 return MT_CIPHER_TKIP;
40 case WLAN_CIPHER_SUITE_CCMP:
41 return MT_CIPHER_AES_CCMP;
42 default:
43 return MT_CIPHER_NONE;
44 }
45 }
46
47 int mt76x02_mac_shared_key_setup(struct mt76x02_dev *dev, u8 vif_idx,
48 u8 key_idx, struct ieee80211_key_conf *key)
49 {
50 enum mt76x02_cipher_type cipher;
51 u8 key_data[32];
52 u32 val;
53
54 cipher = mt76x02_mac_get_key_info(key, key_data);
55 if (cipher == MT_CIPHER_NONE && key)
56 return -EOPNOTSUPP;
57
58 val = mt76_rr(dev, MT_SKEY_MODE(vif_idx));
59 val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx));
60 val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx);
61 mt76_wr(dev, MT_SKEY_MODE(vif_idx), val);
62
63 mt76_wr_copy(dev, MT_SKEY(vif_idx, key_idx), key_data,
64 sizeof(key_data));
65
66 return 0;
67 }
68 EXPORT_SYMBOL_GPL(mt76x02_mac_shared_key_setup);
69
70 void mt76x02_mac_wcid_sync_pn(struct mt76x02_dev *dev, u8 idx,
71 struct ieee80211_key_conf *key)
72 {
73 enum mt76x02_cipher_type cipher;
74 u8 key_data[32];
75 u32 iv, eiv;
76 u64 pn;
77
78 cipher = mt76x02_mac_get_key_info(key, key_data);
79 iv = mt76_rr(dev, MT_WCID_IV(idx));
80 eiv = mt76_rr(dev, MT_WCID_IV(idx) + 4);
81
82 pn = (u64)eiv << 16;
83 if (cipher == MT_CIPHER_TKIP) {
84 pn |= (iv >> 16) & 0xff;
85 pn |= (iv & 0xff) << 8;
86 } else if (cipher >= MT_CIPHER_AES_CCMP) {
87 pn |= iv & 0xffff;
88 } else {
89 return;
90 }
91
92 atomic64_set(&key->tx_pn, pn);
93 }
94
95
96 int mt76x02_mac_wcid_set_key(struct mt76x02_dev *dev, u8 idx,
97 struct ieee80211_key_conf *key)
98 {
99 enum mt76x02_cipher_type cipher;
100 u8 key_data[32];
101 u8 iv_data[8];
102 u64 pn;
103
104 cipher = mt76x02_mac_get_key_info(key, key_data);
105 if (cipher == MT_CIPHER_NONE && key)
106 return -EOPNOTSUPP;
107
108 mt76_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data));
109 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PKEY_MODE, cipher);
110
111 memset(iv_data, 0, sizeof(iv_data));
112 if (key) {
113 mt76_rmw_field(dev, MT_WCID_ATTR(idx), MT_WCID_ATTR_PAIRWISE,
114 !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
115
116 pn = atomic64_read(&key->tx_pn);
117
118 iv_data[3] = key->keyidx << 6;
119 if (cipher >= MT_CIPHER_TKIP) {
120 iv_data[3] |= 0x20;
121 put_unaligned_le32(pn >> 16, &iv_data[4]);
122 }
123
124 if (cipher == MT_CIPHER_TKIP) {
125 iv_data[0] = (pn >> 8) & 0xff;
126 iv_data[1] = (iv_data[0] | 0x20) & 0x7f;
127 iv_data[2] = pn & 0xff;
128 } else if (cipher >= MT_CIPHER_AES_CCMP) {
129 put_unaligned_le16((pn & 0xffff), &iv_data[0]);
130 }
131 }
132
133 mt76_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data));
134
135 return 0;
136 }
137
138 void mt76x02_mac_wcid_setup(struct mt76x02_dev *dev, u8 idx,
139 u8 vif_idx, u8 *mac)
140 {
141 struct mt76_wcid_addr addr = {};
142 u32 attr;
143
144 attr = FIELD_PREP(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) |
145 FIELD_PREP(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8));
146
147 mt76_wr(dev, MT_WCID_ATTR(idx), attr);
148
149 if (idx >= 128)
150 return;
151
152 if (mac)
153 memcpy(addr.macaddr, mac, ETH_ALEN);
154
155 mt76_wr_copy(dev, MT_WCID_ADDR(idx), &addr, sizeof(addr));
156 }
157 EXPORT_SYMBOL_GPL(mt76x02_mac_wcid_setup);
158
159 void mt76x02_mac_wcid_set_drop(struct mt76x02_dev *dev, u8 idx, bool drop)
160 {
161 u32 val = mt76_rr(dev, MT_WCID_DROP(idx));
162 u32 bit = MT_WCID_DROP_MASK(idx);
163
164 /* prevent unnecessary writes */
165 if ((val & bit) != (bit * drop))
166 mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop));
167 }
168
169 static __le16
170 mt76x02_mac_tx_rate_val(struct mt76x02_dev *dev,
171 const struct ieee80211_tx_rate *rate, u8 *nss_val)
172 {
173 u8 phy, rate_idx, nss, bw = 0;
174 u16 rateval;
175
176 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
177 rate_idx = rate->idx;
178 nss = 1 + (rate->idx >> 4);
179 phy = MT_PHY_TYPE_VHT;
180 if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
181 bw = 2;
182 else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
183 bw = 1;
184 } else if (rate->flags & IEEE80211_TX_RC_MCS) {
185 rate_idx = rate->idx;
186 nss = 1 + (rate->idx >> 3);
187 phy = MT_PHY_TYPE_HT;
188 if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
189 phy = MT_PHY_TYPE_HT_GF;
190 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
191 bw = 1;
192 } else {
193 const struct ieee80211_rate *r;
194 int band = dev->mt76.chandef.chan->band;
195 u16 val;
196
197 r = &dev->mt76.hw->wiphy->bands[band]->bitrates[rate->idx];
198 if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
199 val = r->hw_value_short;
200 else
201 val = r->hw_value;
202
203 phy = val >> 8;
204 rate_idx = val & 0xff;
205 nss = 1;
206 }
207
208 rateval = FIELD_PREP(MT_RXWI_RATE_INDEX, rate_idx);
209 rateval |= FIELD_PREP(MT_RXWI_RATE_PHY, phy);
210 rateval |= FIELD_PREP(MT_RXWI_RATE_BW, bw);
211 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
212 rateval |= MT_RXWI_RATE_SGI;
213
214 *nss_val = nss;
215 return cpu_to_le16(rateval);
216 }
217
218 void mt76x02_mac_wcid_set_rate(struct mt76x02_dev *dev, struct mt76_wcid *wcid,
219 const struct ieee80211_tx_rate *rate)
220 {
221 s8 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
222 __le16 rateval;
223 u32 tx_info;
224 s8 nss;
225
226 rateval = mt76x02_mac_tx_rate_val(dev, rate, &nss);
227 tx_info = FIELD_PREP(MT_WCID_TX_INFO_RATE, rateval) |
228 FIELD_PREP(MT_WCID_TX_INFO_NSS, nss) |
229 FIELD_PREP(MT_WCID_TX_INFO_TXPWR_ADJ, max_txpwr_adj) |
230 MT_WCID_TX_INFO_SET;
231 wcid->tx_info = tx_info;
232 }
233
234 void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable)
235 {
236 if (enable)
237 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
238 else
239 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
240 }
241
242 bool mt76x02_mac_load_tx_status(struct mt76x02_dev *dev,
243 struct mt76x02_tx_status *stat)
244 {
245 u32 stat1, stat2;
246
247 stat2 = mt76_rr(dev, MT_TX_STAT_FIFO_EXT);
248 stat1 = mt76_rr(dev, MT_TX_STAT_FIFO);
249
250 stat->valid = !!(stat1 & MT_TX_STAT_FIFO_VALID);
251 if (!stat->valid)
252 return false;
253
254 stat->success = !!(stat1 & MT_TX_STAT_FIFO_SUCCESS);
255 stat->aggr = !!(stat1 & MT_TX_STAT_FIFO_AGGR);
256 stat->ack_req = !!(stat1 & MT_TX_STAT_FIFO_ACKREQ);
257 stat->wcid = FIELD_GET(MT_TX_STAT_FIFO_WCID, stat1);
258 stat->rate = FIELD_GET(MT_TX_STAT_FIFO_RATE, stat1);
259
260 stat->retry = FIELD_GET(MT_TX_STAT_FIFO_EXT_RETRY, stat2);
261 stat->pktid = FIELD_GET(MT_TX_STAT_FIFO_EXT_PKTID, stat2);
262
263 trace_mac_txstat_fetch(dev, stat);
264
265 return true;
266 }
267
268 static int
269 mt76x02_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate,
270 enum nl80211_band band)
271 {
272 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
273
274 txrate->idx = 0;
275 txrate->flags = 0;
276 txrate->count = 1;
277
278 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
279 case MT_PHY_TYPE_OFDM:
280 if (band == NL80211_BAND_2GHZ)
281 idx += 4;
282
283 txrate->idx = idx;
284 return 0;
285 case MT_PHY_TYPE_CCK:
286 if (idx >= 8)
287 idx -= 8;
288
289 txrate->idx = idx;
290 return 0;
291 case MT_PHY_TYPE_HT_GF:
292 txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD;
293 /* fall through */
294 case MT_PHY_TYPE_HT:
295 txrate->flags |= IEEE80211_TX_RC_MCS;
296 txrate->idx = idx;
297 break;
298 case MT_PHY_TYPE_VHT:
299 txrate->flags |= IEEE80211_TX_RC_VHT_MCS;
300 txrate->idx = idx;
301 break;
302 default:
303 return -EINVAL;
304 }
305
306 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) {
307 case MT_PHY_BW_20:
308 break;
309 case MT_PHY_BW_40:
310 txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
311 break;
312 case MT_PHY_BW_80:
313 txrate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
314 break;
315 default:
316 return -EINVAL;
317 }
318
319 if (rate & MT_RXWI_RATE_SGI)
320 txrate->flags |= IEEE80211_TX_RC_SHORT_GI;
321
322 return 0;
323 }
324
325 void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi,
326 struct sk_buff *skb, struct mt76_wcid *wcid,
327 struct ieee80211_sta *sta, int len)
328 {
329 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
330 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
331 struct ieee80211_tx_rate *rate = &info->control.rates[0];
332 struct ieee80211_key_conf *key = info->control.hw_key;
333 u32 wcid_tx_info;
334 u16 rate_ht_mask = FIELD_PREP(MT_RXWI_RATE_PHY, BIT(1) | BIT(2));
335 u16 txwi_flags = 0;
336 u8 nss;
337 s8 txpwr_adj, max_txpwr_adj;
338 u8 ccmp_pn[8], nstreams = dev->mt76.chainmask & 0xf;
339
340 memset(txwi, 0, sizeof(*txwi));
341
342 if (!info->control.hw_key && wcid && wcid->hw_key_idx != 0xff &&
343 ieee80211_has_protected(hdr->frame_control)) {
344 wcid = NULL;
345 ieee80211_get_tx_rates(info->control.vif, sta, skb,
346 info->control.rates, 1);
347 }
348
349 if (wcid)
350 txwi->wcid = wcid->idx;
351 else
352 txwi->wcid = 0xff;
353
354 if (wcid && wcid->sw_iv && key) {
355 u64 pn = atomic64_inc_return(&key->tx_pn);
356 ccmp_pn[0] = pn;
357 ccmp_pn[1] = pn >> 8;
358 ccmp_pn[2] = 0;
359 ccmp_pn[3] = 0x20 | (key->keyidx << 6);
360 ccmp_pn[4] = pn >> 16;
361 ccmp_pn[5] = pn >> 24;
362 ccmp_pn[6] = pn >> 32;
363 ccmp_pn[7] = pn >> 40;
364 txwi->iv = *((__le32 *)&ccmp_pn[0]);
365 txwi->eiv = *((__le32 *)&ccmp_pn[4]);
366 }
367
368 if (wcid && (rate->idx < 0 || !rate->count)) {
369 wcid_tx_info = wcid->tx_info;
370 txwi->rate = FIELD_GET(MT_WCID_TX_INFO_RATE, wcid_tx_info);
371 max_txpwr_adj = FIELD_GET(MT_WCID_TX_INFO_TXPWR_ADJ,
372 wcid_tx_info);
373 nss = FIELD_GET(MT_WCID_TX_INFO_NSS, wcid_tx_info);
374 } else {
375 txwi->rate = mt76x02_mac_tx_rate_val(dev, rate, &nss);
376 max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, rate);
377 }
378
379 txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, dev->mt76.txpower_conf,
380 max_txpwr_adj);
381 txwi->ctl2 = FIELD_PREP(MT_TX_PWR_ADJ, txpwr_adj);
382
383 if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E4)
384 txwi->txstream = 0x13;
385 else if (nstreams > 1 && mt76_rev(&dev->mt76) >= MT76XX_REV_E3 &&
386 !(txwi->rate & cpu_to_le16(rate_ht_mask)))
387 txwi->txstream = 0x93;
388
389 if (is_mt76x2(dev) && (info->flags & IEEE80211_TX_CTL_LDPC))
390 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_LDPC);
391 if ((info->flags & IEEE80211_TX_CTL_STBC) && nss == 1)
392 txwi->rate |= cpu_to_le16(MT_RXWI_RATE_STBC);
393 if (nss > 1 && sta && sta->smps_mode == IEEE80211_SMPS_DYNAMIC)
394 txwi_flags |= MT_TXWI_FLAGS_MMPS;
395 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
396 txwi->ack_ctl |= MT_TXWI_ACK_CTL_REQ;
397 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
398 txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ;
399 if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) {
400 u8 ba_size = IEEE80211_MIN_AMPDU_BUF;
401
402 ba_size <<= sta->ht_cap.ampdu_factor;
403 ba_size = min_t(int, 63, ba_size - 1);
404 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
405 ba_size = 0;
406 txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size);
407
408 txwi_flags |= MT_TXWI_FLAGS_AMPDU |
409 FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY,
410 sta->ht_cap.ampdu_density);
411 }
412
413 if (ieee80211_is_probe_resp(hdr->frame_control) ||
414 ieee80211_is_beacon(hdr->frame_control))
415 txwi_flags |= MT_TXWI_FLAGS_TS;
416
417 txwi->flags |= cpu_to_le16(txwi_flags);
418 txwi->len_ctl = cpu_to_le16(len);
419 }
420 EXPORT_SYMBOL_GPL(mt76x02_mac_write_txwi);
421
422 static void
423 mt76x02_mac_fill_tx_status(struct mt76x02_dev *dev,
424 struct ieee80211_tx_info *info,
425 struct mt76x02_tx_status *st, int n_frames)
426 {
427 struct ieee80211_tx_rate *rate = info->status.rates;
428 int cur_idx, last_rate;
429 int i;
430
431 if (!n_frames)
432 return;
433
434 last_rate = min_t(int, st->retry, IEEE80211_TX_MAX_RATES - 1);
435 mt76x02_mac_process_tx_rate(&rate[last_rate], st->rate,
436 dev->mt76.chandef.chan->band);
437 if (last_rate < IEEE80211_TX_MAX_RATES - 1)
438 rate[last_rate + 1].idx = -1;
439
440 cur_idx = rate[last_rate].idx + last_rate;
441 for (i = 0; i <= last_rate; i++) {
442 rate[i].flags = rate[last_rate].flags;
443 rate[i].idx = max_t(int, 0, cur_idx - i);
444 rate[i].count = 1;
445 }
446 rate[last_rate].count = st->retry + 1 - last_rate;
447
448 info->status.ampdu_len = n_frames;
449 info->status.ampdu_ack_len = st->success ? n_frames : 0;
450
451 if (st->aggr)
452 info->flags |= IEEE80211_TX_CTL_AMPDU |
453 IEEE80211_TX_STAT_AMPDU;
454
455 if (!st->ack_req)
456 info->flags |= IEEE80211_TX_CTL_NO_ACK;
457 else if (st->success)
458 info->flags |= IEEE80211_TX_STAT_ACK;
459 }
460
461 void mt76x02_send_tx_status(struct mt76x02_dev *dev,
462 struct mt76x02_tx_status *stat, u8 *update)
463 {
464 struct ieee80211_tx_info info = {};
465 struct ieee80211_tx_status status = {
466 .info = &info
467 };
468 struct mt76_wcid *wcid = NULL;
469 struct mt76x02_sta *msta = NULL;
470 struct mt76_dev *mdev = &dev->mt76;
471 struct sk_buff_head list;
472
473 if (stat->pktid == MT_PACKET_ID_NO_ACK)
474 return;
475
476 rcu_read_lock();
477
478 if (stat->wcid < ARRAY_SIZE(dev->mt76.wcid))
479 wcid = rcu_dereference(dev->mt76.wcid[stat->wcid]);
480
481 if (wcid && wcid->sta) {
482 void *priv;
483
484 priv = msta = container_of(wcid, struct mt76x02_sta, wcid);
485 status.sta = container_of(priv, struct ieee80211_sta,
486 drv_priv);
487 }
488
489 mt76_tx_status_lock(mdev, &list);
490
491 if (wcid) {
492 if (stat->pktid >= MT_PACKET_ID_FIRST)
493 status.skb = mt76_tx_status_skb_get(mdev, wcid,
494 stat->pktid, &list);
495 if (status.skb)
496 status.info = IEEE80211_SKB_CB(status.skb);
497 }
498
499 if (msta && stat->aggr && !status.skb) {
500 u32 stat_val, stat_cache;
501
502 stat_val = stat->rate;
503 stat_val |= ((u32) stat->retry) << 16;
504 stat_cache = msta->status.rate;
505 stat_cache |= ((u32) msta->status.retry) << 16;
506
507 if (*update == 0 && stat_val == stat_cache &&
508 stat->wcid == msta->status.wcid && msta->n_frames < 32) {
509 msta->n_frames++;
510 mt76_tx_status_unlock(mdev, &list);
511 rcu_read_unlock();
512 return;
513 }
514
515 mt76x02_mac_fill_tx_status(dev, status.info, &msta->status,
516 msta->n_frames);
517
518 msta->status = *stat;
519 msta->n_frames = 1;
520 *update = 0;
521 } else {
522 mt76x02_mac_fill_tx_status(dev, status.info, stat, 1);
523 *update = 1;
524 }
525
526 if (status.skb)
527 mt76_tx_status_skb_done(mdev, status.skb, &list);
528 mt76_tx_status_unlock(mdev, &list);
529
530 if (!status.skb)
531 ieee80211_tx_status_ext(mt76_hw(dev), &status);
532 rcu_read_unlock();
533 }
534
535 static int
536 mt76x02_mac_process_rate(struct mt76x02_dev *dev,
537 struct mt76_rx_status *status,
538 u16 rate)
539 {
540 u8 idx = FIELD_GET(MT_RXWI_RATE_INDEX, rate);
541
542 switch (FIELD_GET(MT_RXWI_RATE_PHY, rate)) {
543 case MT_PHY_TYPE_OFDM:
544 if (idx >= 8)
545 idx = 0;
546
547 if (status->band == NL80211_BAND_2GHZ)
548 idx += 4;
549
550 status->rate_idx = idx;
551 return 0;
552 case MT_PHY_TYPE_CCK:
553 if (idx >= 8) {
554 idx -= 8;
555 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
556 }
557
558 if (idx >= 4)
559 idx = 0;
560
561 status->rate_idx = idx;
562 return 0;
563 case MT_PHY_TYPE_HT_GF:
564 status->enc_flags |= RX_ENC_FLAG_HT_GF;
565 /* fall through */
566 case MT_PHY_TYPE_HT:
567 status->encoding = RX_ENC_HT;
568 status->rate_idx = idx;
569 break;
570 case MT_PHY_TYPE_VHT: {
571 u8 n_rxstream = dev->mt76.chainmask & 0xf;
572
573 status->encoding = RX_ENC_VHT;
574 status->rate_idx = FIELD_GET(MT_RATE_INDEX_VHT_IDX, idx);
575 status->nss = min_t(u8, n_rxstream,
576 FIELD_GET(MT_RATE_INDEX_VHT_NSS, idx) + 1);
577 break;
578 }
579 default:
580 return -EINVAL;
581 }
582
583 if (rate & MT_RXWI_RATE_LDPC)
584 status->enc_flags |= RX_ENC_FLAG_LDPC;
585
586 if (rate & MT_RXWI_RATE_SGI)
587 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
588
589 if (rate & MT_RXWI_RATE_STBC)
590 status->enc_flags |= 1 << RX_ENC_FLAG_STBC_SHIFT;
591
592 switch (FIELD_GET(MT_RXWI_RATE_BW, rate)) {
593 case MT_PHY_BW_20:
594 break;
595 case MT_PHY_BW_40:
596 status->bw = RATE_INFO_BW_40;
597 break;
598 case MT_PHY_BW_80:
599 status->bw = RATE_INFO_BW_80;
600 break;
601 default:
602 break;
603 }
604
605 return 0;
606 }
607
608 void mt76x02_mac_setaddr(struct mt76x02_dev *dev, const u8 *addr)
609 {
610 static const u8 null_addr[ETH_ALEN] = {};
611 int i;
612
613 ether_addr_copy(dev->mt76.macaddr, addr);
614
615 if (!is_valid_ether_addr(dev->mt76.macaddr)) {
616 eth_random_addr(dev->mt76.macaddr);
617 dev_info(dev->mt76.dev,
618 "Invalid MAC address, using random address %pM\n",
619 dev->mt76.macaddr);
620 }
621
622 mt76_wr(dev, MT_MAC_ADDR_DW0, get_unaligned_le32(dev->mt76.macaddr));
623 mt76_wr(dev, MT_MAC_ADDR_DW1,
624 get_unaligned_le16(dev->mt76.macaddr + 4) |
625 FIELD_PREP(MT_MAC_ADDR_DW1_U2ME_MASK, 0xff));
626
627 mt76_wr(dev, MT_MAC_BSSID_DW0,
628 get_unaligned_le32(dev->mt76.macaddr));
629 mt76_wr(dev, MT_MAC_BSSID_DW1,
630 get_unaligned_le16(dev->mt76.macaddr + 4) |
631 FIELD_PREP(MT_MAC_BSSID_DW1_MBSS_MODE, 3) | /* 8 APs + 8 STAs */
632 MT_MAC_BSSID_DW1_MBSS_LOCAL_BIT);
633
634 for (i = 0; i < 16; i++)
635 mt76x02_mac_set_bssid(dev, i, null_addr);
636 }
637 EXPORT_SYMBOL_GPL(mt76x02_mac_setaddr);
638
639 static int
640 mt76x02_mac_get_rssi(struct mt76x02_dev *dev, s8 rssi, int chain)
641 {
642 struct mt76x02_rx_freq_cal *cal = &dev->cal.rx;
643
644 rssi += cal->rssi_offset[chain];
645 rssi -= cal->lna_gain;
646
647 return rssi;
648 }
649
650 int mt76x02_mac_process_rx(struct mt76x02_dev *dev, struct sk_buff *skb,
651 void *rxi)
652 {
653 struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
654 struct mt76x02_rxwi *rxwi = rxi;
655 struct mt76x02_sta *sta;
656 u32 rxinfo = le32_to_cpu(rxwi->rxinfo);
657 u32 ctl = le32_to_cpu(rxwi->ctl);
658 u16 rate = le16_to_cpu(rxwi->rate);
659 u16 tid_sn = le16_to_cpu(rxwi->tid_sn);
660 bool unicast = rxwi->rxinfo & cpu_to_le32(MT_RXINFO_UNICAST);
661 int pad_len = 0, nstreams = dev->mt76.chainmask & 0xf;
662 s8 signal;
663 u8 pn_len;
664 u8 wcid;
665 int len;
666
667 if (!test_bit(MT76_STATE_RUNNING, &dev->mt76.state))
668 return -EINVAL;
669
670 if (rxinfo & MT_RXINFO_L2PAD)
671 pad_len += 2;
672
673 if (rxinfo & MT_RXINFO_DECRYPT) {
674 status->flag |= RX_FLAG_DECRYPTED;
675 status->flag |= RX_FLAG_MMIC_STRIPPED;
676 status->flag |= RX_FLAG_MIC_STRIPPED;
677 status->flag |= RX_FLAG_IV_STRIPPED;
678 }
679
680 wcid = FIELD_GET(MT_RXWI_CTL_WCID, ctl);
681 sta = mt76x02_rx_get_sta(&dev->mt76, wcid);
682 status->wcid = mt76x02_rx_get_sta_wcid(sta, unicast);
683
684 len = FIELD_GET(MT_RXWI_CTL_MPDU_LEN, ctl);
685 pn_len = FIELD_GET(MT_RXINFO_PN_LEN, rxinfo);
686 if (pn_len) {
687 int offset = ieee80211_get_hdrlen_from_skb(skb) + pad_len;
688 u8 *data = skb->data + offset;
689
690 status->iv[0] = data[7];
691 status->iv[1] = data[6];
692 status->iv[2] = data[5];
693 status->iv[3] = data[4];
694 status->iv[4] = data[1];
695 status->iv[5] = data[0];
696
697 /*
698 * Driver CCMP validation can't deal with fragments.
699 * Let mac80211 take care of it.
700 */
701 if (rxinfo & MT_RXINFO_FRAG) {
702 status->flag &= ~RX_FLAG_IV_STRIPPED;
703 } else {
704 pad_len += pn_len << 2;
705 len -= pn_len << 2;
706 }
707 }
708
709 mt76x02_remove_hdr_pad(skb, pad_len);
710
711 if ((rxinfo & MT_RXINFO_BA) && !(rxinfo & MT_RXINFO_NULL))
712 status->aggr = true;
713
714 if (WARN_ON_ONCE(len > skb->len))
715 return -EINVAL;
716
717 pskb_trim(skb, len);
718
719 status->chains = BIT(0);
720 signal = mt76x02_mac_get_rssi(dev, rxwi->rssi[0], 0);
721 status->chain_signal[0] = signal;
722 if (nstreams > 1) {
723 status->chains |= BIT(1);
724 status->chain_signal[1] = mt76x02_mac_get_rssi(dev,
725 rxwi->rssi[1],
726 1);
727 signal = max_t(s8, signal, status->chain_signal[1]);
728 }
729 status->signal = signal;
730 status->freq = dev->mt76.chandef.chan->center_freq;
731 status->band = dev->mt76.chandef.chan->band;
732
733 status->tid = FIELD_GET(MT_RXWI_TID, tid_sn);
734 status->seqno = FIELD_GET(MT_RXWI_SN, tid_sn);
735
736 return mt76x02_mac_process_rate(dev, status, rate);
737 }
738
739 void mt76x02_mac_poll_tx_status(struct mt76x02_dev *dev, bool irq)
740 {
741 struct mt76x02_tx_status stat = {};
742 u8 update = 1;
743 bool ret;
744
745 if (!test_bit(MT76_STATE_RUNNING, &dev->mt76.state))
746 return;
747
748 trace_mac_txstat_poll(dev);
749
750 while (!irq || !kfifo_is_full(&dev->txstatus_fifo)) {
751 if (!spin_trylock(&dev->txstatus_fifo_lock))
752 break;
753
754 ret = mt76x02_mac_load_tx_status(dev, &stat);
755 spin_unlock(&dev->txstatus_fifo_lock);
756
757 if (!ret)
758 break;
759
760 if (!irq) {
761 mt76x02_send_tx_status(dev, &stat, &update);
762 continue;
763 }
764
765 kfifo_put(&dev->txstatus_fifo, stat);
766 }
767 }
768
769 void mt76x02_tx_complete_skb(struct mt76_dev *mdev, enum mt76_txq_id qid,
770 struct mt76_queue_entry *e)
771 {
772 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
773 struct mt76x02_txwi *txwi;
774 u8 *txwi_ptr;
775
776 if (!e->txwi) {
777 dev_kfree_skb_any(e->skb);
778 return;
779 }
780
781 mt76x02_mac_poll_tx_status(dev, false);
782
783 txwi_ptr = mt76_get_txwi_ptr(mdev, e->txwi);
784 txwi = (struct mt76x02_txwi *)txwi_ptr;
785 trace_mac_txdone_add(dev, txwi->wcid, txwi->pktid);
786
787 mt76_tx_complete_skb(mdev, e->skb);
788 }
789 EXPORT_SYMBOL_GPL(mt76x02_tx_complete_skb);
790
791 void mt76x02_mac_set_rts_thresh(struct mt76x02_dev *dev, u32 val)
792 {
793 u32 data = 0;
794
795 if (val != ~0)
796 data = FIELD_PREP(MT_PROT_CFG_CTRL, 1) |
797 MT_PROT_CFG_RTS_THRESH;
798
799 mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, val);
800
801 mt76_rmw(dev, MT_CCK_PROT_CFG,
802 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
803 mt76_rmw(dev, MT_OFDM_PROT_CFG,
804 MT_PROT_CFG_CTRL | MT_PROT_CFG_RTS_THRESH, data);
805 }
806
807 void mt76x02_mac_set_tx_protection(struct mt76x02_dev *dev, bool legacy_prot,
808 int ht_mode)
809 {
810 int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
811 bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
812 u32 prot[6];
813 u32 vht_prot[3];
814 int i;
815 u16 rts_thr;
816
817 for (i = 0; i < ARRAY_SIZE(prot); i++) {
818 prot[i] = mt76_rr(dev, MT_CCK_PROT_CFG + i * 4);
819 prot[i] &= ~MT_PROT_CFG_CTRL;
820 if (i >= 2)
821 prot[i] &= ~MT_PROT_CFG_RATE;
822 }
823
824 for (i = 0; i < ARRAY_SIZE(vht_prot); i++) {
825 vht_prot[i] = mt76_rr(dev, MT_TX_PROT_CFG6 + i * 4);
826 vht_prot[i] &= ~(MT_PROT_CFG_CTRL | MT_PROT_CFG_RATE);
827 }
828
829 rts_thr = mt76_get_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH);
830
831 if (rts_thr != 0xffff)
832 prot[0] |= MT_PROT_CTRL_RTS_CTS;
833
834 if (legacy_prot) {
835 prot[1] |= MT_PROT_CTRL_CTS2SELF;
836
837 prot[2] |= MT_PROT_RATE_CCK_11;
838 prot[3] |= MT_PROT_RATE_CCK_11;
839 prot[4] |= MT_PROT_RATE_CCK_11;
840 prot[5] |= MT_PROT_RATE_CCK_11;
841
842 vht_prot[0] |= MT_PROT_RATE_CCK_11;
843 vht_prot[1] |= MT_PROT_RATE_CCK_11;
844 vht_prot[2] |= MT_PROT_RATE_CCK_11;
845 } else {
846 if (rts_thr != 0xffff)
847 prot[1] |= MT_PROT_CTRL_RTS_CTS;
848
849 prot[2] |= MT_PROT_RATE_OFDM_24;
850 prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
851 prot[4] |= MT_PROT_RATE_OFDM_24;
852 prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
853
854 vht_prot[0] |= MT_PROT_RATE_OFDM_24;
855 vht_prot[1] |= MT_PROT_RATE_DUP_OFDM_24;
856 vht_prot[2] |= MT_PROT_RATE_SGI_OFDM_24;
857 }
858
859 switch (mode) {
860 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
861 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
862 prot[2] |= MT_PROT_CTRL_RTS_CTS;
863 prot[3] |= MT_PROT_CTRL_RTS_CTS;
864 prot[4] |= MT_PROT_CTRL_RTS_CTS;
865 prot[5] |= MT_PROT_CTRL_RTS_CTS;
866 vht_prot[0] |= MT_PROT_CTRL_RTS_CTS;
867 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
868 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
869 break;
870 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
871 prot[3] |= MT_PROT_CTRL_RTS_CTS;
872 prot[5] |= MT_PROT_CTRL_RTS_CTS;
873 vht_prot[1] |= MT_PROT_CTRL_RTS_CTS;
874 vht_prot[2] |= MT_PROT_CTRL_RTS_CTS;
875 break;
876 }
877
878 if (non_gf) {
879 prot[4] |= MT_PROT_CTRL_RTS_CTS;
880 prot[5] |= MT_PROT_CTRL_RTS_CTS;
881 }
882
883 for (i = 0; i < ARRAY_SIZE(prot); i++)
884 mt76_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
885
886 for (i = 0; i < ARRAY_SIZE(vht_prot); i++)
887 mt76_wr(dev, MT_TX_PROT_CFG6 + i * 4, vht_prot[i]);
888 }
889
890 void mt76x02_update_channel(struct mt76_dev *mdev)
891 {
892 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
893 struct mt76_channel_state *state;
894 u32 active, busy;
895
896 state = mt76_channel_state(&dev->mt76, dev->mt76.chandef.chan);
897
898 busy = mt76_rr(dev, MT_CH_BUSY);
899 active = busy + mt76_rr(dev, MT_CH_IDLE);
900
901 spin_lock_bh(&dev->mt76.cc_lock);
902 state->cc_busy += busy;
903 state->cc_active += active;
904 spin_unlock_bh(&dev->mt76.cc_lock);
905 }
906 EXPORT_SYMBOL_GPL(mt76x02_update_channel);
907
908 static void mt76x02_check_mac_err(struct mt76x02_dev *dev)
909 {
910 u32 val = mt76_rr(dev, 0x10f4);
911
912 if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
913 return;
914
915 dev_err(dev->mt76.dev, "mac specific condition occurred\n");
916
917 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
918 udelay(10);
919 mt76_wr(dev, MT_MAC_SYS_CTRL,
920 MT_MAC_SYS_CTRL_ENABLE_TX | MT_MAC_SYS_CTRL_ENABLE_RX);
921 }
922
923 static void
924 mt76x02_edcca_tx_enable(struct mt76x02_dev *dev, bool enable)
925 {
926 if (enable) {
927 u32 data;
928
929 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
930 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
931 /* enable pa-lna */
932 data = mt76_rr(dev, MT_TX_PIN_CFG);
933 data |= MT_TX_PIN_CFG_TXANT |
934 MT_TX_PIN_CFG_RXANT |
935 MT_TX_PIN_RFTR_EN |
936 MT_TX_PIN_TRSW_EN;
937 mt76_wr(dev, MT_TX_PIN_CFG, data);
938 } else {
939 mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_ENABLE_TX);
940 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_EN);
941 /* disable pa-lna */
942 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_TXANT);
943 mt76_clear(dev, MT_TX_PIN_CFG, MT_TX_PIN_CFG_RXANT);
944 }
945 dev->ed_tx_blocked = !enable;
946 }
947
948 void mt76x02_edcca_init(struct mt76x02_dev *dev, bool enable)
949 {
950 dev->ed_trigger = 0;
951 dev->ed_silent = 0;
952
953 if (dev->ed_monitor && enable) {
954 struct ieee80211_channel *chan = dev->mt76.chandef.chan;
955 u8 ed_th = chan->band == NL80211_BAND_5GHZ ? 0x0e : 0x20;
956
957 mt76_clear(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
958 mt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
959 mt76_rmw(dev, MT_BBP(AGC, 2), GENMASK(15, 0),
960 ed_th << 8 | ed_th);
961 mt76_set(dev, MT_TXOP_HLDR_ET, MT_TXOP_HLDR_TX40M_BLK_EN);
962 } else {
963 mt76_set(dev, MT_TX_LINK_CFG, MT_TX_CFACK_EN);
964 mt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);
965 if (is_mt76x2(dev)) {
966 mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070);
967 mt76_set(dev, MT_TXOP_HLDR_ET,
968 MT_TXOP_HLDR_TX40M_BLK_EN);
969 } else {
970 mt76_wr(dev, MT_BBP(AGC, 2), 0x003a6464);
971 mt76_clear(dev, MT_TXOP_HLDR_ET,
972 MT_TXOP_HLDR_TX40M_BLK_EN);
973 }
974 }
975 mt76x02_edcca_tx_enable(dev, true);
976 dev->ed_monitor_learning = true;
977
978 /* clear previous CCA timer value */
979 mt76_rr(dev, MT_ED_CCA_TIMER);
980 dev->ed_time = ktime_get_boottime();
981 }
982 EXPORT_SYMBOL_GPL(mt76x02_edcca_init);
983
984 #define MT_EDCCA_TH 92
985 #define MT_EDCCA_BLOCK_TH 2
986 #define MT_EDCCA_LEARN_TH 50
987 #define MT_EDCCA_LEARN_CCA 180
988 #define MT_EDCCA_LEARN_TIMEOUT (20 * HZ)
989
990 static void mt76x02_edcca_check(struct mt76x02_dev *dev)
991 {
992 ktime_t cur_time;
993 u32 active, val, busy;
994
995 cur_time = ktime_get_boottime();
996 val = mt76_rr(dev, MT_ED_CCA_TIMER);
997
998 active = ktime_to_us(ktime_sub(cur_time, dev->ed_time));
999 dev->ed_time = cur_time;
1000
1001 busy = (val * 100) / active;
1002 busy = min_t(u32, busy, 100);
1003
1004 if (busy > MT_EDCCA_TH) {
1005 dev->ed_trigger++;
1006 dev->ed_silent = 0;
1007 } else {
1008 dev->ed_silent++;
1009 dev->ed_trigger = 0;
1010 }
1011
1012 if (dev->cal.agc_lowest_gain &&
1013 dev->cal.false_cca > MT_EDCCA_LEARN_CCA &&
1014 dev->ed_trigger > MT_EDCCA_LEARN_TH) {
1015 dev->ed_monitor_learning = false;
1016 dev->ed_trigger_timeout = jiffies + 20 * HZ;
1017 } else if (!dev->ed_monitor_learning &&
1018 time_is_after_jiffies(dev->ed_trigger_timeout)) {
1019 dev->ed_monitor_learning = true;
1020 mt76x02_edcca_tx_enable(dev, true);
1021 }
1022
1023 if (dev->ed_monitor_learning)
1024 return;
1025
1026 if (dev->ed_trigger > MT_EDCCA_BLOCK_TH && !dev->ed_tx_blocked)
1027 mt76x02_edcca_tx_enable(dev, false);
1028 else if (dev->ed_silent > MT_EDCCA_BLOCK_TH && dev->ed_tx_blocked)
1029 mt76x02_edcca_tx_enable(dev, true);
1030 }
1031
1032 void mt76x02_mac_work(struct work_struct *work)
1033 {
1034 struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
1035 mt76.mac_work.work);
1036 int i, idx;
1037
1038 mutex_lock(&dev->mt76.mutex);
1039
1040 mt76x02_update_channel(&dev->mt76);
1041 for (i = 0, idx = 0; i < 16; i++) {
1042 u32 val = mt76_rr(dev, MT_TX_AGG_CNT(i));
1043
1044 dev->aggr_stats[idx++] += val & 0xffff;
1045 dev->aggr_stats[idx++] += val >> 16;
1046 }
1047
1048 if (!dev->mt76.beacon_mask)
1049 mt76x02_check_mac_err(dev);
1050
1051 if (dev->ed_monitor)
1052 mt76x02_edcca_check(dev);
1053
1054 mutex_unlock(&dev->mt76.mutex);
1055
1056 mt76_tx_status_check(&dev->mt76, NULL, false);
1057
1058 ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
1059 MT_MAC_WORK_INTERVAL);
1060 }
1061
1062 void mt76x02_mac_set_bssid(struct mt76x02_dev *dev, u8 idx, const u8 *addr)
1063 {
1064 idx &= 7;
1065 mt76_wr(dev, MT_MAC_APC_BSSID_L(idx), get_unaligned_le32(addr));
1066 mt76_rmw_field(dev, MT_MAC_APC_BSSID_H(idx), MT_MAC_APC_BSSID_H_ADDR,
1067 get_unaligned_le16(addr + 4));
1068 }
Linux with added FPC-III support