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

   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 <linux/kernel.h>
  19
  20 #include "mt76x02.h"
  21
  22 void mt76x02_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
  23                 struct sk_buff *skb)
  24 {
  25         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  26         struct mt76x02_dev *dev = hw->priv;
  27         struct ieee80211_vif *vif = info->control.vif;
  28         struct mt76_wcid *wcid = &dev->mt76.global_wcid;
  29
  30         if (control->sta) {
  31                 struct mt76x02_sta *msta;
  32
  33                 msta = (struct mt76x02_sta *)control->sta->drv_priv;
  34                 wcid = &msta->wcid;
  35         } else if (vif) {
  36                 struct mt76x02_vif *mvif;
  37
  38                 mvif = (struct mt76x02_vif *)vif->drv_priv;
  39                 wcid = &mvif->group_wcid;
  40         }
  41
  42         mt76_tx(&dev->mt76, control->sta, wcid, skb);
  43 }
  44 EXPORT_SYMBOL_GPL(mt76x02_tx);
  45
  46 void mt76x02_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
  47                           struct sk_buff *skb)
  48 {
  49         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
  50         void *rxwi = skb->data;
  51
  52         if (q == MT_RXQ_MCU) {
  53                 /* this is used just by mmio code */
  54                 mt76_mcu_rx_event(&dev->mt76, skb);
  55                 return;
  56         }
  57
  58         skb_pull(skb, sizeof(struct mt76x02_rxwi));
  59         if (mt76x02_mac_process_rx(dev, skb, rxwi)) {
  60                 dev_kfree_skb(skb);
  61                 return;
  62         }
  63
  64         mt76_rx(mdev, q, skb);
  65 }
  66 EXPORT_SYMBOL_GPL(mt76x02_queue_rx_skb);
  67
  68 s8 mt76x02_tx_get_max_txpwr_adj(struct mt76x02_dev *dev,
  69                                 const struct ieee80211_tx_rate *rate)
  70 {
  71         s8 max_txpwr;
  72
  73         if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
  74                 u8 mcs = ieee80211_rate_get_vht_mcs(rate);
  75
  76                 if (mcs == 8 || mcs == 9) {
  77                         max_txpwr = dev->mt76.rate_power.vht[8];
  78                 } else {
  79                         u8 nss, idx;
  80
  81                         nss = ieee80211_rate_get_vht_nss(rate);
  82                         idx = ((nss - 1) << 3) + mcs;
  83                         max_txpwr = dev->mt76.rate_power.ht[idx & 0xf];
  84                 }
  85         } else if (rate->flags & IEEE80211_TX_RC_MCS) {
  86                 max_txpwr = dev->mt76.rate_power.ht[rate->idx & 0xf];
  87         } else {
  88                 enum nl80211_band band = dev->mt76.chandef.chan->band;
  89
  90                 if (band == NL80211_BAND_2GHZ) {
  91                         const struct ieee80211_rate *r;
  92                         struct wiphy *wiphy = dev->mt76.hw->wiphy;
  93                         struct mt76_rate_power *rp = &dev->mt76.rate_power;
  94
  95                         r = &wiphy->bands[band]->bitrates[rate->idx];
  96                         if (r->flags & IEEE80211_RATE_SHORT_PREAMBLE)
  97                                 max_txpwr = rp->cck[r->hw_value & 0x3];
  98                         else
  99                                 max_txpwr = rp->ofdm[r->hw_value & 0x7];
 100                 } else {
 101                         max_txpwr = dev->mt76.rate_power.ofdm[rate->idx & 0x7];
 102                 }
 103         }
 104
 105         return max_txpwr;
 106 }
 107
 108 s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr, s8 max_txpwr_adj)
 109 {
 110         txpwr = min_t(s8, txpwr, dev->mt76.txpower_conf);
 111         txpwr -= (dev->target_power + dev->target_power_delta[0]);
 112         txpwr = min_t(s8, txpwr, max_txpwr_adj);
 113
 114         if (!dev->enable_tpc)
 115                 return 0;
 116         else if (txpwr >= 0)
 117                 return min_t(s8, txpwr, 7);
 118         else
 119                 return (txpwr < -16) ? 8 : (txpwr + 32) / 2;
 120 }
 121
 122 void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr)
 123 {
 124         s8 txpwr_adj;
 125
 126         txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, txpwr,
 127                                              dev->mt76.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(mt76x02_tx_set_txpwr_auto);
 134
 135 bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update)
 136 {
 137         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 138         struct mt76x02_tx_status stat;
 139
 140         if (!mt76x02_mac_load_tx_status(dev, &stat))
 141                 return false;
 142
 143         mt76x02_send_tx_status(dev, &stat, update);
 144
 145         return true;
 146 }
 147 EXPORT_SYMBOL_GPL(mt76x02_tx_status_data);
 148
 149 int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 150                            enum mt76_txq_id qid, struct mt76_wcid *wcid,
 151                            struct ieee80211_sta *sta,
 152                            struct mt76_tx_info *tx_info)
 153 {
 154         struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76);
 155         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx_info->skb->data;
 156         struct mt76x02_txwi *txwi = txwi_ptr;
 157         int hdrlen, len, pid, qsel = MT_QSEL_EDCA;
 158
 159         if (qid == MT_TXQ_PSD && wcid && wcid->idx < 128)
 160                 mt76x02_mac_wcid_set_drop(dev, wcid->idx, false);
 161
 162         hdrlen = ieee80211_hdrlen(hdr->frame_control);
 163         len = tx_info->skb->len - (hdrlen & 2);
 164         mt76x02_mac_write_txwi(dev, txwi, tx_info->skb, wcid, sta, len);
 165
 166         pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
 167         txwi->pktid = pid;
 168
 169         if (pid >= MT_PACKET_ID_FIRST)
 170                 qsel = MT_QSEL_MGMT;
 171
 172         tx_info->info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) |
 173                         MT_TXD_INFO_80211;
 174
 175         if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv)
 176                 tx_info->info |= MT_TXD_INFO_WIV;
 177
 178         return 0;
 179 }
 180 EXPORT_SYMBOL_GPL(mt76x02_tx_prepare_skb);