1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
5  */
6 
7 #include <linux/kernel.h>
8 
9 #include "mt76x02.h"
10 
11 void mt76x02_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
12 		struct sk_buff *skb)
13 {
14 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
15 	struct mt76x02_dev *dev = hw->priv;
16 	struct ieee80211_vif *vif = info->control.vif;
17 	struct mt76_wcid *wcid = &dev->mt76.global_wcid;
18 
19 	if (control->sta) {
20 		struct mt76x02_sta *msta;
21 
22 		msta = (struct mt76x02_sta *)control->sta->drv_priv;
23 		wcid = &msta->wcid;
24 	} else if (vif) {
25 		struct mt76x02_vif *mvif;
26 
27 		mvif = (struct mt76x02_vif *)vif->drv_priv;
28 		wcid = &mvif->group_wcid;
29 	}
30 
31 	mt76_tx(&dev->mt76, control->sta, wcid, skb);
32 }
33 EXPORT_SYMBOL_GPL(mt76x02_tx);
34 
35 void mt76x02_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
36 			  struct sk_buff *skb)
37 {
38 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
39 	void *rxwi = skb->data;
40 
41 	if (q == MT_RXQ_MCU) {
42 		/* this is used just by mmio code */
43 		mt76_mcu_rx_event(&dev->mt76, skb);
44 		return;
45 	}
46 
47 	skb_pull(skb, sizeof(struct mt76x02_rxwi));
48 	if (mt76x02_mac_process_rx(dev, skb, rxwi)) {
49 		dev_kfree_skb(skb);
50 		return;
51 	}
52 
53 	mt76_rx(mdev, q, skb);
54 }
55 EXPORT_SYMBOL_GPL(mt76x02_queue_rx_skb);
56 
57 s8 mt76x02_tx_get_max_txpwr_adj(struct mt76x02_dev *dev,
58 				const struct ieee80211_tx_rate *rate)
59 {
60 	s8 max_txpwr;
61 
62 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
63 		u8 mcs = ieee80211_rate_get_vht_mcs(rate);
64 
65 		if (mcs == 8 || mcs == 9) {
66 			max_txpwr = dev->mt76.rate_power.vht[8];
67 		} else {
68 			u8 nss, idx;
69 
70 			nss = ieee80211_rate_get_vht_nss(rate);
71 			idx = ((nss - 1) << 3) + mcs;
72 			max_txpwr = dev->mt76.rate_power.ht[idx & 0xf];
73 		}
74 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {
75 		max_txpwr = dev->mt76.rate_power.ht[rate->idx & 0xf];
76 	} else {
77 		enum nl80211_band band = dev->mt76.chandef.chan->band;
78 
79 		if (band == NL80211_BAND_2GHZ) {
80 			const struct ieee80211_rate *r;
81 			struct wiphy *wiphy = dev->mt76.hw->wiphy;
82 			struct mt76_rate_power *rp = &dev->mt76.rate_power;
83 
84 			r = &wiphy->bands[band]->bitrates[rate->idx];
85 			if (r->flags & IEEE80211_RATE_SHORT_PREAMBLE)
86 				max_txpwr = rp->cck[r->hw_value & 0x3];
87 			else
88 				max_txpwr = rp->ofdm[r->hw_value & 0x7];
89 		} else {
90 			max_txpwr = dev->mt76.rate_power.ofdm[rate->idx & 0x7];
91 		}
92 	}
93 
94 	return max_txpwr;
95 }
96 
97 s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr, s8 max_txpwr_adj)
98 {
99 	txpwr = min_t(s8, txpwr, dev->mt76.txpower_conf);
100 	txpwr -= (dev->target_power + dev->target_power_delta[0]);
101 	txpwr = min_t(s8, txpwr, max_txpwr_adj);
102 
103 	if (!dev->enable_tpc)
104 		return 0;
105 	else if (txpwr >= 0)
106 		return min_t(s8, txpwr, 7);
107 	else
108 		return (txpwr < -16) ? 8 : (txpwr + 32) / 2;
109 }
110 
111 void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr)
112 {
113 	s8 txpwr_adj;
114 
115 	txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, txpwr,
116 					     dev->mt76.rate_power.ofdm[4]);
117 	mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
118 		       MT_PROT_AUTO_TX_CFG_PROT_PADJ, txpwr_adj);
119 	mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
120 		       MT_PROT_AUTO_TX_CFG_AUTO_PADJ, txpwr_adj);
121 }
122 EXPORT_SYMBOL_GPL(mt76x02_tx_set_txpwr_auto);
123 
124 bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update)
125 {
126 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
127 	struct mt76x02_tx_status stat;
128 
129 	if (!mt76x02_mac_load_tx_status(dev, &stat))
130 		return false;
131 
132 	mt76x02_send_tx_status(dev, &stat, update);
133 
134 	return true;
135 }
136 EXPORT_SYMBOL_GPL(mt76x02_tx_status_data);
137 
138 int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
139 			   enum mt76_txq_id qid, struct mt76_wcid *wcid,
140 			   struct ieee80211_sta *sta,
141 			   struct mt76_tx_info *tx_info)
142 {
143 	struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
144 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx_info->skb->data;
145 	struct mt76x02_txwi *txwi = txwi_ptr;
146 	bool ampdu = IEEE80211_SKB_CB(tx_info->skb)->flags & IEEE80211_TX_CTL_AMPDU;
147 	int hdrlen, len, pid, qsel = MT_QSEL_EDCA;
148 
149 	if (qid == MT_TXQ_PSD && wcid && wcid->idx < 128)
150 		mt76x02_mac_wcid_set_drop(dev, wcid->idx, false);
151 
152 	hdrlen = ieee80211_hdrlen(hdr->frame_control);
153 	len = tx_info->skb->len - (hdrlen & 2);
154 	mt76x02_mac_write_txwi(dev, txwi, tx_info->skb, wcid, sta, len);
155 
156 	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
157 
158 	/* encode packet rate for no-skb packet id to fix up status reporting */
159 	if (pid == MT_PACKET_ID_NO_SKB)
160 		pid = MT_PACKET_ID_HAS_RATE |
161 		      (le16_to_cpu(txwi->rate) & MT_RXWI_RATE_INDEX) |
162 		      FIELD_PREP(MT_PKTID_AC,
163 				 skb_get_queue_mapping(tx_info->skb));
164 
165 	txwi->pktid = pid;
166 
167 	if (mt76_is_skb_pktid(pid) && ampdu)
168 		qsel = MT_QSEL_MGMT;
169 
170 	tx_info->info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
171 			MT_TXD_INFO_80211;
172 
173 	if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
174 		tx_info->info |= MT_TXD_INFO_WIV;
175 
176 	if (sta) {
177 		struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
178 
179 		ewma_pktlen_add(&msta->pktlen, tx_info->skb->len);
180 	}
181 
182 	return 0;
183 }
184 EXPORT_SYMBOL_GPL(mt76x02_tx_prepare_skb);
185