drivers/net/wireless/mediatek/mt76/mt76x02_txrx.c

   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->mphy, 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                 mt76_mcu_rx_event(&dev->mt76, skb);
  43                 return;
  44         }
  45
  46         skb_pull(skb, sizeof(struct mt76x02_rxwi));
  47         if (mt76x02_mac_process_rx(dev, skb, rxwi)) {
  48                 dev_kfree_skb(skb);
  49                 return;
  50         }
  51
  52         mt76_rx(mdev, q, skb);
  53 }
  54 EXPORT_SYMBOL_GPL(mt76x02_queue_rx_skb);
  55
  56 s8 mt76x02_tx_get_max_txpwr_adj(struct mt76x02_dev *dev,
  57                                 const struct ieee80211_tx_rate *rate)
  58 {
  59         s8 max_txpwr;
  60
  61         if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
  62                 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
  63
  64                 if (mcs == 8 || mcs == 9) {
  65                         max_txpwr = dev->mt76.rate_power.vht[8];
  66                 } else {
  67                         u8 nss, idx;
  68
  69                         nss = ieee80211_rate_get_vht_nss(rate);
  70                         idx = ((nss - 1) << 3) + mcs;
  71                         max_txpwr = dev->mt76.rate_power.ht[idx & 0xf];
  72                 }
  73         } else if (rate->flags & IEEE80211_TX_RC_MCS) {
  74                 max_txpwr = dev->mt76.rate_power.ht[rate->idx & 0xf];
  75         } else {
  76                 enum nl80211_band band = dev->mphy.chandef.chan->band;
  77
  78                 if (band == NL80211_BAND_2GHZ) {
  79                         const struct ieee80211_rate *r;
  80                         struct wiphy *wiphy = dev->mt76.hw->wiphy;
  81                         struct mt76_rate_power *rp = &dev->mt76.rate_power;
  82
  83                         r = &wiphy->bands[band]->bitrates[rate->idx];
  84                         if (r->flags & IEEE80211_RATE_SHORT_PREAMBLE)
  85                                 max_txpwr = rp->cck[r->hw_value & 0x3];
  86                         else
  87                                 max_txpwr = rp->ofdm[r->hw_value & 0x7];
  88                 } else {
  89                         max_txpwr = dev->mt76.rate_power.ofdm[rate->idx & 0x7];
  90                 }
  91         }
  92
  93         return max_txpwr;
  94 }
  95
  96 s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr, s8 max_txpwr_adj)
  97 {
  98         txpwr = min_t(s8, txpwr, dev->txpower_conf);
  99         txpwr -= (dev->target_power + dev->target_power_delta[0]);
 100         txpwr = min_t(s8, txpwr, max_txpwr_adj);
 101
 102         if (!dev->enable_tpc)
 103                 return 0;
 104         else if (txpwr >= 0)
 105                 return min_t(s8, txpwr, 7);
 106         else
 107                 return (txpwr < -16) ? 8 : (txpwr + 32) / 2;
 108 }
 109
 110 void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr)
 111 {
 112         s8 txpwr_adj;
 113
 114         txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, txpwr,
 115                                              dev->mt76.rate_power.ofdm[4]);
 116         mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
 117                        MT_PROT_AUTO_TX_CFG_PROT_PADJ, txpwr_adj);
 118         mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG,
 119                        MT_PROT_AUTO_TX_CFG_AUTO_PADJ, txpwr_adj);
 120 }
 121 EXPORT_SYMBOL_GPL(mt76x02_tx_set_txpwr_auto);
 122
 123 bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update)
 124 {
 125         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 126         struct mt76x02_tx_status stat;
 127
 128         if (!mt76x02_mac_load_tx_status(dev, &stat))
 129                 return false;
 130
 131         mt76x02_send_tx_status(dev, &stat, update);
 132
 133         return true;
 134 }
 135 EXPORT_SYMBOL_GPL(mt76x02_tx_status_data);
 136
 137 int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 138                            enum mt76_txq_id qid, struct mt76_wcid *wcid,
 139                            struct ieee80211_sta *sta,
 140                            struct mt76_tx_info *tx_info)
 141 {
 142         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 143         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx_info->skb->data;
 144         struct mt76x02_txwi *txwi = txwi_ptr;
 145         bool ampdu = IEEE80211_SKB_CB(tx_info->skb)->flags & IEEE80211_TX_CTL_AMPDU;
 146         int hdrlen, len, pid, qsel = MT_QSEL_EDCA;
 147
 148         if (qid == MT_TXQ_PSD && wcid && wcid->idx < 128)
 149                 mt76x02_mac_wcid_set_drop(dev, wcid->idx, false);
 150
 151         hdrlen = ieee80211_hdrlen(hdr->frame_control);
 152         len = tx_info->skb->len - (hdrlen & 2);
 153         mt76x02_mac_write_txwi(dev, txwi, tx_info->skb, wcid, sta, len);
 154
 155         pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
 156
 157         /* encode packet rate for no-skb packet id to fix up status reporting */
 158         if (pid == MT_PACKET_ID_NO_SKB)
 159                 pid = MT_PACKET_ID_HAS_RATE |
 160                       (le16_to_cpu(txwi->rate) & MT_RXWI_RATE_INDEX) |
 161                       FIELD_PREP(MT_PKTID_AC,
 162                                  skb_get_queue_mapping(tx_info->skb));
 163
 164         txwi->pktid = pid;
 165
 166         if (mt76_is_skb_pktid(pid) && ampdu)
 167                 qsel = MT_QSEL_MGMT;
 168
 169         tx_info->info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
 170                         MT_TXD_INFO_80211;
 171
 172         if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
 173                 tx_info->info |= MT_TXD_INFO_WIV;
 174
 175         if (sta) {
 176                 struct mt76x02_sta *msta = (struct mt76x02_sta *)sta->drv_priv;
 177
 178                 ewma_pktlen_add(&msta->pktlen, tx_info->skb->len);
 179         }
 180
 181         return 0;
 182 }
 183 EXPORT_SYMBOL_GPL(mt76x02_tx_prepare_skb);