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
 11void 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}
 33EXPORT_SYMBOL_GPL(mt76x02_tx);
 34
 35void 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}
 55EXPORT_SYMBOL_GPL(mt76x02_queue_rx_skb);
 56
 57s8 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
 97s8 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
111void 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}
122EXPORT_SYMBOL_GPL(mt76x02_tx_set_txpwr_auto);
123
124bool 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}
136EXPORT_SYMBOL_GPL(mt76x02_tx_status_data);
137
138int 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
163	txwi->pktid = pid;
164
165	if (mt76_is_skb_pktid(pid) && ampdu)
166		qsel = MT_QSEL_MGMT;
167
168	tx_info->info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
169			MT_TXD_INFO_80211;
170
171	if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
172		tx_info->info |= MT_TXD_INFO_WIV;
173
174	return 0;
175}
176EXPORT_SYMBOL_GPL(mt76x02_tx_prepare_skb);