1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include "mt7601u.h"
16#include "trace.h"
17#include <linux/etherdevice.h>
18
19static void
20mt76_mac_process_tx_rate(struct ieee80211_tx_rate *txrate, u16 rate)
21{
22 u8 idx = MT76_GET(MT_TXWI_RATE_MCS, rate);
23
24 txrate->idx = 0;
25 txrate->flags = 0;
26 txrate->count = 1;
27
28 switch (MT76_GET(MT_TXWI_RATE_PHY_MODE, rate)) {
29 case MT_PHY_TYPE_OFDM:
30 txrate->idx = idx + 4;
31 return;
32 case MT_PHY_TYPE_CCK:
33 if (idx >= 8)
34 idx -= 8;
35
36 txrate->idx = idx;
37 return;
38 case MT_PHY_TYPE_HT_GF:
39 txrate->flags |= IEEE80211_TX_RC_GREEN_FIELD;
40
41 case MT_PHY_TYPE_HT:
42 txrate->flags |= IEEE80211_TX_RC_MCS;
43 txrate->idx = idx;
44 break;
45 default:
46 WARN_ON(1);
47 return;
48 }
49
50 if (MT76_GET(MT_TXWI_RATE_BW, rate) == MT_PHY_BW_40)
51 txrate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
52
53 if (rate & MT_TXWI_RATE_SGI)
54 txrate->flags |= IEEE80211_TX_RC_SHORT_GI;
55}
56
57static void
58mt76_mac_fill_tx_status(struct mt7601u_dev *dev, struct ieee80211_tx_info *info,
59 struct mt76_tx_status *st)
60{
61 struct ieee80211_tx_rate *rate = info->status.rates;
62 int cur_idx, last_rate;
63 int i;
64
65 last_rate = min_t(int, st->retry, IEEE80211_TX_MAX_RATES - 1);
66 mt76_mac_process_tx_rate(&rate[last_rate], st->rate);
67 if (last_rate < IEEE80211_TX_MAX_RATES - 1)
68 rate[last_rate + 1].idx = -1;
69
70 cur_idx = rate[last_rate].idx + st->retry;
71 for (i = 0; i <= last_rate; i++) {
72 rate[i].flags = rate[last_rate].flags;
73 rate[i].idx = max_t(int, 0, cur_idx - i);
74 rate[i].count = 1;
75 }
76
77 if (last_rate > 0)
78 rate[last_rate - 1].count = st->retry + 1 - last_rate;
79
80 info->status.ampdu_len = 1;
81 info->status.ampdu_ack_len = st->success;
82
83 if (st->is_probe)
84 info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
85
86 if (st->aggr)
87 info->flags |= IEEE80211_TX_CTL_AMPDU |
88 IEEE80211_TX_STAT_AMPDU;
89
90 if (!st->ack_req)
91 info->flags |= IEEE80211_TX_CTL_NO_ACK;
92 else if (st->success)
93 info->flags |= IEEE80211_TX_STAT_ACK;
94}
95
96u16 mt76_mac_tx_rate_val(struct mt7601u_dev *dev,
97 const struct ieee80211_tx_rate *rate, u8 *nss_val)
98{
99 u16 rateval;
100 u8 phy, rate_idx;
101 u8 nss = 1;
102 u8 bw = 0;
103
104 if (rate->flags & IEEE80211_TX_RC_MCS) {
105 rate_idx = rate->idx;
106 nss = 1 + (rate->idx >> 3);
107 phy = MT_PHY_TYPE_HT;
108 if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
109 phy = MT_PHY_TYPE_HT_GF;
110 if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
111 bw = 1;
112 } else {
113 const struct ieee80211_rate *r;
114 int band = dev->chandef.chan->band;
115 u16 val;
116
117 r = &dev->hw->wiphy->bands[band]->bitrates[rate->idx];
118 if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
119 val = r->hw_value_short;
120 else
121 val = r->hw_value;
122
123 phy = val >> 8;
124 rate_idx = val & 0xff;
125 bw = 0;
126 }
127
128 rateval = MT76_SET(MT_RXWI_RATE_MCS, rate_idx);
129 rateval |= MT76_SET(MT_RXWI_RATE_PHY, phy);
130 rateval |= MT76_SET(MT_RXWI_RATE_BW, bw);
131 if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
132 rateval |= MT_RXWI_RATE_SGI;
133
134 *nss_val = nss;
135 return rateval;
136}
137
138void mt76_mac_wcid_set_rate(struct mt7601u_dev *dev, struct mt76_wcid *wcid,
139 const struct ieee80211_tx_rate *rate)
140{
141 unsigned long flags;
142
143 spin_lock_irqsave(&dev->lock, flags);
144 wcid->tx_rate = mt76_mac_tx_rate_val(dev, rate, &wcid->tx_rate_nss);
145 wcid->tx_rate_set = true;
146 spin_unlock_irqrestore(&dev->lock, flags);
147}
148
149struct mt76_tx_status mt7601u_mac_fetch_tx_status(struct mt7601u_dev *dev)
150{
151 struct mt76_tx_status stat = {};
152 u32 val;
153
154 val = mt7601u_rr(dev, MT_TX_STAT_FIFO);
155 stat.valid = !!(val & MT_TX_STAT_FIFO_VALID);
156 stat.success = !!(val & MT_TX_STAT_FIFO_SUCCESS);
157 stat.aggr = !!(val & MT_TX_STAT_FIFO_AGGR);
158 stat.ack_req = !!(val & MT_TX_STAT_FIFO_ACKREQ);
159 stat.pktid = MT76_GET(MT_TX_STAT_FIFO_PID_TYPE, val);
160 stat.wcid = MT76_GET(MT_TX_STAT_FIFO_WCID, val);
161 stat.rate = MT76_GET(MT_TX_STAT_FIFO_RATE, val);
162
163 return stat;
164}
165
166void mt76_send_tx_status(struct mt7601u_dev *dev, struct mt76_tx_status *stat)
167{
168 struct ieee80211_tx_info info = {};
169 struct ieee80211_sta *sta = NULL;
170 struct mt76_wcid *wcid = NULL;
171 void *msta;
172
173 rcu_read_lock();
174 if (stat->wcid < ARRAY_SIZE(dev->wcid))
175 wcid = rcu_dereference(dev->wcid[stat->wcid]);
176
177 if (wcid) {
178 msta = container_of(wcid, struct mt76_sta, wcid);
179 sta = container_of(msta, struct ieee80211_sta,
180 drv_priv);
181 }
182
183 mt76_mac_fill_tx_status(dev, &info, stat);
184
185 spin_lock_bh(&dev->mac_lock);
186 ieee80211_tx_status_noskb(dev->hw, sta, &info);
187 spin_unlock_bh(&dev->mac_lock);
188
189 rcu_read_unlock();
190}
191
192void mt7601u_mac_set_protection(struct mt7601u_dev *dev, bool legacy_prot,
193 int ht_mode)
194{
195 int mode = ht_mode & IEEE80211_HT_OP_MODE_PROTECTION;
196 bool non_gf = !!(ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
197 u32 prot[6];
198 bool ht_rts[4] = {};
199 int i;
200
201 prot[0] = MT_PROT_NAV_SHORT |
202 MT_PROT_TXOP_ALLOW_ALL |
203 MT_PROT_RTS_THR_EN;
204 prot[1] = prot[0];
205 if (legacy_prot)
206 prot[1] |= MT_PROT_CTRL_CTS2SELF;
207
208 prot[2] = prot[4] = MT_PROT_NAV_SHORT | MT_PROT_TXOP_ALLOW_BW20;
209 prot[3] = prot[5] = MT_PROT_NAV_SHORT | MT_PROT_TXOP_ALLOW_ALL;
210
211 if (legacy_prot) {
212 prot[2] |= MT_PROT_RATE_CCK_11;
213 prot[3] |= MT_PROT_RATE_CCK_11;
214 prot[4] |= MT_PROT_RATE_CCK_11;
215 prot[5] |= MT_PROT_RATE_CCK_11;
216 } else {
217 prot[2] |= MT_PROT_RATE_OFDM_24;
218 prot[3] |= MT_PROT_RATE_DUP_OFDM_24;
219 prot[4] |= MT_PROT_RATE_OFDM_24;
220 prot[5] |= MT_PROT_RATE_DUP_OFDM_24;
221 }
222
223 switch (mode) {
224 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
225 break;
226
227 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
228 ht_rts[0] = ht_rts[1] = ht_rts[2] = ht_rts[3] = true;
229 break;
230
231 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
232 ht_rts[1] = ht_rts[3] = true;
233 break;
234
235 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
236 ht_rts[0] = ht_rts[1] = ht_rts[2] = ht_rts[3] = true;
237 break;
238 }
239
240 if (non_gf)
241 ht_rts[2] = ht_rts[3] = true;
242
243 for (i = 0; i < 4; i++)
244 if (ht_rts[i])
245 prot[i + 2] |= MT_PROT_CTRL_RTS_CTS;
246
247 for (i = 0; i < 6; i++)
248 mt7601u_wr(dev, MT_CCK_PROT_CFG + i * 4, prot[i]);
249}
250
251void mt7601u_mac_set_short_preamble(struct mt7601u_dev *dev, bool short_preamb)
252{
253 if (short_preamb)
254 mt76_set(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
255 else
256 mt76_clear(dev, MT_AUTO_RSP_CFG, MT_AUTO_RSP_PREAMB_SHORT);
257}
258
259void mt7601u_mac_config_tsf(struct mt7601u_dev *dev, bool enable, int interval)
260{
261 u32 val = mt7601u_rr(dev, MT_BEACON_TIME_CFG);
262
263 val &= ~(MT_BEACON_TIME_CFG_TIMER_EN |
264 MT_BEACON_TIME_CFG_SYNC_MODE |
265 MT_BEACON_TIME_CFG_TBTT_EN);
266
267 if (!enable) {
268 mt7601u_wr(dev, MT_BEACON_TIME_CFG, val);
269 return;
270 }
271
272 val &= ~MT_BEACON_TIME_CFG_INTVAL;
273 val |= MT76_SET(MT_BEACON_TIME_CFG_INTVAL, interval << 4) |
274 MT_BEACON_TIME_CFG_TIMER_EN |
275 MT_BEACON_TIME_CFG_SYNC_MODE |
276 MT_BEACON_TIME_CFG_TBTT_EN;
277}
278
279static void mt7601u_check_mac_err(struct mt7601u_dev *dev)
280{
281 u32 val = mt7601u_rr(dev, 0x10f4);
282
283 if (!(val & BIT(29)) || !(val & (BIT(7) | BIT(5))))
284 return;
285
286 dev_err(dev->dev, "Error: MAC specific condition occurred\n");
287
288 mt76_set(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
289 udelay(10);
290 mt76_clear(dev, MT_MAC_SYS_CTRL, MT_MAC_SYS_CTRL_RESET_CSR);
291}
292
293void mt7601u_mac_work(struct work_struct *work)
294{
295 struct mt7601u_dev *dev = container_of(work, struct mt7601u_dev,
296 mac_work.work);
297 struct {
298 u32 addr_base;
299 u32 span;
300 u64 *stat_base;
301 } spans[] = {
302 { MT_RX_STA_CNT0, 3, dev->stats.rx_stat },
303 { MT_TX_STA_CNT0, 3, dev->stats.tx_stat },
304 { MT_TX_AGG_STAT, 1, dev->stats.aggr_stat },
305 { MT_MPDU_DENSITY_CNT, 1, dev->stats.zero_len_del },
306 { MT_TX_AGG_CNT_BASE0, 8, &dev->stats.aggr_n[0] },
307 { MT_TX_AGG_CNT_BASE1, 8, &dev->stats.aggr_n[16] },
308 };
309 u32 sum, n;
310 int i, j, k;
311
312
313
314
315
316
317
318 k = 0;
319 n = 0;
320 sum = 0;
321 for (i = 0; i < ARRAY_SIZE(spans); i++)
322 for (j = 0; j < spans[i].span; j++) {
323 u32 val = mt7601u_rr(dev, spans[i].addr_base + j * 4);
324
325 spans[i].stat_base[j * 2] += val & 0xffff;
326 spans[i].stat_base[j * 2 + 1] += val >> 16;
327
328
329 if (spans[i].addr_base != MT_TX_AGG_CNT_BASE0 &&
330 spans[i].addr_base != MT_TX_AGG_CNT_BASE1)
331 continue;
332
333 n += (val >> 16) + (val & 0xffff);
334 sum += (val & 0xffff) * (1 + k * 2) +
335 (val >> 16) * (2 + k * 2);
336 k++;
337 }
338
339 atomic_set(&dev->avg_ampdu_len, n ? DIV_ROUND_CLOSEST(sum, n) : 1);
340
341 mt7601u_check_mac_err(dev);
342
343 ieee80211_queue_delayed_work(dev->hw, &dev->mac_work, 10 * HZ);
344}
345
346void
347mt7601u_mac_wcid_setup(struct mt7601u_dev *dev, u8 idx, u8 vif_idx, u8 *mac)
348{
349 u8 zmac[ETH_ALEN] = {};
350 u32 attr;
351
352 attr = MT76_SET(MT_WCID_ATTR_BSS_IDX, vif_idx & 7) |
353 MT76_SET(MT_WCID_ATTR_BSS_IDX_EXT, !!(vif_idx & 8));
354
355 mt76_wr(dev, MT_WCID_ATTR(idx), attr);
356
357 if (mac)
358 memcpy(zmac, mac, sizeof(zmac));
359
360 mt7601u_addr_wr(dev, MT_WCID_ADDR(idx), zmac);
361}
362
363void mt7601u_mac_set_ampdu_factor(struct mt7601u_dev *dev)
364{
365 struct ieee80211_sta *sta;
366 struct mt76_wcid *wcid;
367 void *msta;
368 u8 min_factor = 3;
369 int i;
370
371 rcu_read_lock();
372 for (i = 0; i < ARRAY_SIZE(dev->wcid); i++) {
373 wcid = rcu_dereference(dev->wcid[i]);
374 if (!wcid)
375 continue;
376
377 msta = container_of(wcid, struct mt76_sta, wcid);
378 sta = container_of(msta, struct ieee80211_sta, drv_priv);
379
380 min_factor = min(min_factor, sta->ht_cap.ampdu_factor);
381 }
382 rcu_read_unlock();
383
384 mt7601u_wr(dev, MT_MAX_LEN_CFG, 0xa0fff |
385 MT76_SET(MT_MAX_LEN_CFG_AMPDU, min_factor));
386}
387
388static void
389mt76_mac_process_rate(struct ieee80211_rx_status *status, u16 rate)
390{
391 u8 idx = MT76_GET(MT_RXWI_RATE_MCS, rate);
392
393 switch (MT76_GET(MT_RXWI_RATE_PHY, rate)) {
394 case MT_PHY_TYPE_OFDM:
395 if (WARN_ON(idx >= 8))
396 idx = 0;
397 idx += 4;
398
399 status->rate_idx = idx;
400 return;
401 case MT_PHY_TYPE_CCK:
402 if (idx >= 8) {
403 idx -= 8;
404 status->flag |= RX_FLAG_SHORTPRE;
405 }
406
407 if (WARN_ON(idx >= 4))
408 idx = 0;
409
410 status->rate_idx = idx;
411 return;
412 case MT_PHY_TYPE_HT_GF:
413 status->flag |= RX_FLAG_HT_GF;
414
415 case MT_PHY_TYPE_HT:
416 status->flag |= RX_FLAG_HT;
417 status->rate_idx = idx;
418 break;
419 default:
420 WARN_ON(1);
421 return;
422 }
423
424 if (rate & MT_RXWI_RATE_SGI)
425 status->flag |= RX_FLAG_SHORT_GI;
426
427 if (rate & MT_RXWI_RATE_STBC)
428 status->flag |= 1 << RX_FLAG_STBC_SHIFT;
429
430 if (rate & MT_RXWI_RATE_BW)
431 status->flag |= RX_FLAG_40MHZ;
432}
433
434static void
435mt7601u_rx_monitor_beacon(struct mt7601u_dev *dev, struct mt7601u_rxwi *rxwi,
436 u16 rate, int rssi)
437{
438 dev->bcn_freq_off = rxwi->freq_off;
439 dev->bcn_phy_mode = MT76_GET(MT_RXWI_RATE_PHY, rate);
440 dev->avg_rssi = (dev->avg_rssi * 15) / 16 + (rssi << 8);
441}
442
443static int
444mt7601u_rx_is_our_beacon(struct mt7601u_dev *dev, u8 *data)
445{
446 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)data;
447
448 return ieee80211_is_beacon(hdr->frame_control) &&
449 ether_addr_equal(hdr->addr2, dev->ap_bssid);
450}
451
452u32 mt76_mac_process_rx(struct mt7601u_dev *dev, struct sk_buff *skb,
453 u8 *data, void *rxi)
454{
455 struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
456 struct mt7601u_rxwi *rxwi = rxi;
457 u32 len, ctl = le32_to_cpu(rxwi->ctl);
458 u16 rate = le16_to_cpu(rxwi->rate);
459 int rssi;
460
461 len = MT76_GET(MT_RXWI_CTL_MPDU_LEN, ctl);
462 if (len < 10)
463 return 0;
464
465 if (rxwi->rxinfo & cpu_to_le32(MT_RXINFO_DECRYPT)) {
466 status->flag |= RX_FLAG_DECRYPTED;
467 status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;
468 }
469
470 status->chains = BIT(0);
471 rssi = mt7601u_phy_get_rssi(dev, rxwi, rate);
472 status->chain_signal[0] = status->signal = rssi;
473 status->freq = dev->chandef.chan->center_freq;
474 status->band = dev->chandef.chan->band;
475
476 mt76_mac_process_rate(status, rate);
477
478 spin_lock_bh(&dev->con_mon_lock);
479 if (mt7601u_rx_is_our_beacon(dev, data))
480 mt7601u_rx_monitor_beacon(dev, rxwi, rate, rssi);
481 else if (rxwi->rxinfo & cpu_to_le32(MT_RXINFO_U2M))
482 dev->avg_rssi = (dev->avg_rssi * 15) / 16 + (rssi << 8);
483 spin_unlock_bh(&dev->con_mon_lock);
484
485 return len;
486}
487
488static enum mt76_cipher_type
489mt76_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
490{
491 memset(key_data, 0, 32);
492 if (!key)
493 return MT_CIPHER_NONE;
494
495 if (key->keylen > 32)
496 return MT_CIPHER_NONE;
497
498 memcpy(key_data, key->key, key->keylen);
499
500 switch (key->cipher) {
501 case WLAN_CIPHER_SUITE_WEP40:
502 return MT_CIPHER_WEP40;
503 case WLAN_CIPHER_SUITE_WEP104:
504 return MT_CIPHER_WEP104;
505 case WLAN_CIPHER_SUITE_TKIP:
506 return MT_CIPHER_TKIP;
507 case WLAN_CIPHER_SUITE_CCMP:
508 return MT_CIPHER_AES_CCMP;
509 default:
510 return MT_CIPHER_NONE;
511 }
512}
513
514int mt76_mac_wcid_set_key(struct mt7601u_dev *dev, u8 idx,
515 struct ieee80211_key_conf *key)
516{
517 enum mt76_cipher_type cipher;
518 u8 key_data[32];
519 u8 iv_data[8];
520 u32 val;
521
522 cipher = mt76_mac_get_key_info(key, key_data);
523 if (cipher == MT_CIPHER_NONE && key)
524 return -EINVAL;
525
526 trace_set_key(dev, idx);
527
528 mt7601u_wr_copy(dev, MT_WCID_KEY(idx), key_data, sizeof(key_data));
529
530 memset(iv_data, 0, sizeof(iv_data));
531 if (key) {
532 iv_data[3] = key->keyidx << 6;
533 if (cipher >= MT_CIPHER_TKIP) {
534
535
536
537 iv_data[0] |= 1;
538 iv_data[3] |= 0x20;
539 }
540 }
541 mt7601u_wr_copy(dev, MT_WCID_IV(idx), iv_data, sizeof(iv_data));
542
543 val = mt7601u_rr(dev, MT_WCID_ATTR(idx));
544 val &= ~MT_WCID_ATTR_PKEY_MODE & ~MT_WCID_ATTR_PKEY_MODE_EXT;
545 val |= MT76_SET(MT_WCID_ATTR_PKEY_MODE, cipher & 7) |
546 MT76_SET(MT_WCID_ATTR_PKEY_MODE_EXT, cipher >> 3);
547 val &= ~MT_WCID_ATTR_PAIRWISE;
548 val |= MT_WCID_ATTR_PAIRWISE *
549 !!(key && key->flags & IEEE80211_KEY_FLAG_PAIRWISE);
550 mt7601u_wr(dev, MT_WCID_ATTR(idx), val);
551
552 return 0;
553}
554
555int mt76_mac_shared_key_setup(struct mt7601u_dev *dev, u8 vif_idx, u8 key_idx,
556 struct ieee80211_key_conf *key)
557{
558 enum mt76_cipher_type cipher;
559 u8 key_data[32];
560 u32 val;
561
562 cipher = mt76_mac_get_key_info(key, key_data);
563 if (cipher == MT_CIPHER_NONE && key)
564 return -EINVAL;
565
566 trace_set_shared_key(dev, vif_idx, key_idx);
567
568 mt7601u_wr_copy(dev, MT_SKEY(vif_idx, key_idx),
569 key_data, sizeof(key_data));
570
571 val = mt76_rr(dev, MT_SKEY_MODE(vif_idx));
572 val &= ~(MT_SKEY_MODE_MASK << MT_SKEY_MODE_SHIFT(vif_idx, key_idx));
573 val |= cipher << MT_SKEY_MODE_SHIFT(vif_idx, key_idx);
574 mt76_wr(dev, MT_SKEY_MODE(vif_idx), val);
575
576 return 0;
577}
578
