1 /*
2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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 "mt76x2.h"
19 #include "mt76x2_dma.h"
20
mt76x2_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)21 void mt76x2_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
22 struct sk_buff *skb)
23 {
24 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
25 struct mt76x2_dev *dev = hw->priv;
26 struct ieee80211_vif *vif = info->control.vif;
27 struct mt76_wcid *wcid = &dev->global_wcid;
28
29 if (control->sta) {
30 struct mt76x2_sta *msta;
31
32 msta = (struct mt76x2_sta *)control->sta->drv_priv;
33 wcid = &msta->wcid;
34 /* sw encrypted frames */
35 if (!info->control.hw_key && wcid->hw_key_idx != -1)
36 control->sta = NULL;
37 }
38
39 if (vif && !control->sta) {
40 struct mt76x2_vif *mvif;
41
42 mvif = (struct mt76x2_vif *)vif->drv_priv;
43 wcid = &mvif->group_wcid;
44 }
45
46 mt76_tx(&dev->mt76, control->sta, wcid, skb);
47 }
48 EXPORT_SYMBOL_GPL(mt76x2_tx);
49
mt76x2_insert_hdr_pad(struct sk_buff * skb)50 int mt76x2_insert_hdr_pad(struct sk_buff *skb)
51 {
52 int len = ieee80211_get_hdrlen_from_skb(skb);
53
54 if (len % 4 == 0)
55 return 0;
56
57 skb_push(skb, 2);
58 memmove(skb->data, skb->data + 2, len);
59
60 skb->data[len] = 0;
61 skb->data[len + 1] = 0;
62 return 2;
63 }
64 EXPORT_SYMBOL_GPL(mt76x2_insert_hdr_pad);
65
mt76x2_tx_get_max_txpwr_adj(struct mt76x2_dev * dev,const struct ieee80211_tx_rate * rate)66 s8 mt76x2_tx_get_max_txpwr_adj(struct mt76x2_dev *dev,
67 const struct ieee80211_tx_rate *rate)
68 {
69 s8 max_txpwr;
70
71 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
72 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
73
74 if (mcs == 8 || mcs == 9) {
75 max_txpwr = dev->rate_power.vht[8];
76 } else {
77 u8 nss, idx;
78
79 nss = ieee80211_rate_get_vht_nss(rate);
80 idx = ((nss - 1) << 3) + mcs;
81 max_txpwr = dev->rate_power.ht[idx & 0xf];
82 }
83 } else if (rate->flags & IEEE80211_TX_RC_MCS) {
84 max_txpwr = dev->rate_power.ht[rate->idx & 0xf];
85 } else {
86 enum nl80211_band band = dev->mt76.chandef.chan->band;
87
88 if (band == NL80211_BAND_2GHZ) {
89 const struct ieee80211_rate *r;
90 struct wiphy *wiphy = mt76_hw(dev)->wiphy;
91 struct mt76_rate_power *rp = &dev->rate_power;
92
93 r = &wiphy->bands[band]->bitrates[rate->idx];
94 if (r->flags & IEEE80211_RATE_SHORT_PREAMBLE)
95 max_txpwr = rp->cck[r->hw_value & 0x3];
96 else
97 max_txpwr = rp->ofdm[r->hw_value & 0x7];
98 } else {
99 max_txpwr = dev->rate_power.ofdm[rate->idx & 0x7];
100 }
101 }
102
103 return max_txpwr;
104 }
105 EXPORT_SYMBOL_GPL(mt76x2_tx_get_max_txpwr_adj);
106
mt76x2_tx_get_txpwr_adj(struct mt76x2_dev * dev,s8 txpwr,s8 max_txpwr_adj)107 s8 mt76x2_tx_get_txpwr_adj(struct mt76x2_dev *dev, s8 txpwr, s8 max_txpwr_adj)
108 {
109 txpwr = min_t(s8, txpwr, dev->txpower_conf);
110 txpwr -= (dev->target_power + dev->target_power_delta[0]);
111 txpwr = min_t(s8, txpwr, max_txpwr_adj);
112
113 if (!dev->enable_tpc)
114 return 0;
115 else if (txpwr >= 0)
116 return min_t(s8, txpwr, 7);
117 else
118 return (txpwr < -16) ? 8 : (txpwr + 32) / 2;
119 }
120 EXPORT_SYMBOL_GPL(mt76x2_tx_get_txpwr_adj);
121
mt76x2_tx_set_txpwr_auto(struct mt76x2_dev * dev,s8 txpwr)122 void mt76x2_tx_set_txpwr_auto(struct mt76x2_dev *dev, s8 txpwr)
123 {
124 s8 txpwr_adj;
125
126 txpwr_adj = mt76x2_tx_get_txpwr_adj(dev, txpwr,
127 dev->rate_power.ofdm[4]);
128 mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
129 MT_PROT_AUTO_TX_CFG_PROT_PADJ, txpwr_adj);
130 mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
131 MT_PROT_AUTO_TX_CFG_AUTO_PADJ, txpwr_adj);
132 }
133 EXPORT_SYMBOL_GPL(mt76x2_tx_set_txpwr_auto);
134
mt76x2_tx_complete(struct mt76x2_dev * dev,struct sk_buff * skb)135 void mt76x2_tx_complete(struct mt76x2_dev *dev, struct sk_buff *skb)
136 {
137 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
138
139 if (info->flags & IEEE80211_TX_CTL_AMPDU) {
140 ieee80211_free_txskb(mt76_hw(dev), skb);
141 } else {
142 ieee80211_tx_info_clear_status(info);
143 info->status.rates[0].idx = -1;
144 info->flags |= IEEE80211_TX_STAT_ACK;
145 ieee80211_tx_status(mt76_hw(dev), skb);
146 }
147 }
148 EXPORT_SYMBOL_GPL(mt76x2_tx_complete);
149
150
