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_hdr *hdr = (struct ieee80211_hdr *) skb->data; 26 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 27 struct mt76x02_dev *dev = hw->priv; 28 struct ieee80211_vif *vif = info->control.vif; 29 struct mt76_wcid *wcid = &dev->mt76.global_wcid; 30 31 if (control->sta) { 32 struct mt76x02_sta *msta; 33 34 msta = (struct mt76x02_sta *)control->sta->drv_priv; 35 wcid = &msta->wcid; 36 /* sw encrypted frames */ 37 if (!info->control.hw_key && wcid->hw_key_idx != 0xff && 38 ieee80211_has_protected(hdr->frame_control)) 39 control->sta = NULL; 40 } 41 42 if (vif && !control->sta) { 43 struct mt76x02_vif *mvif; 44 45 mvif = (struct mt76x02_vif *)vif->drv_priv; 46 wcid = &mvif->group_wcid; 47 } 48 49 mt76_tx(&dev->mt76, control->sta, wcid, skb); 50 } 51 EXPORT_SYMBOL_GPL(mt76x02_tx); 52 53 void mt76x02_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q, 54 struct sk_buff *skb) 55 { 56 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); 57 void *rxwi = skb->data; 58 59 if (q == MT_RXQ_MCU) { 60 /* this is used just by mmio code */ 61 skb_queue_tail(&mdev->mmio.mcu.res_q, skb); 62 wake_up(&mdev->mmio.mcu.wait); 63 return; 64 } 65 66 skb_pull(skb, sizeof(struct mt76x02_rxwi)); 67 if (mt76x02_mac_process_rx(dev, skb, rxwi)) { 68 dev_kfree_skb(skb); 69 return; 70 } 71 72 mt76_rx(mdev, q, skb); 73 } 74 EXPORT_SYMBOL_GPL(mt76x02_queue_rx_skb); 75 76 s8 mt76x02_tx_get_max_txpwr_adj(struct mt76x02_dev *dev, 77 const struct ieee80211_tx_rate *rate) 78 { 79 s8 max_txpwr; 80 81 if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { 82 u8 mcs = ieee80211_rate_get_vht_mcs(rate); 83 84 if (mcs == 8 || mcs == 9) { 85 max_txpwr = dev->mt76.rate_power.vht[8]; 86 } else { 87 u8 nss, idx; 88 89 nss = ieee80211_rate_get_vht_nss(rate); 90 idx = ((nss - 1) << 3) + mcs; 91 max_txpwr = dev->mt76.rate_power.ht[idx & 0xf]; 92 } 93 } else if (rate->flags & IEEE80211_TX_RC_MCS) { 94 max_txpwr = dev->mt76.rate_power.ht[rate->idx & 0xf]; 95 } else { 96 enum nl80211_band band = dev->mt76.chandef.chan->band; 97 98 if (band == NL80211_BAND_2GHZ) { 99 const struct ieee80211_rate *r; 100 struct wiphy *wiphy = dev->mt76.hw->wiphy; 101 struct mt76_rate_power *rp = &dev->mt76.rate_power; 102 103 r = &wiphy->bands[band]->bitrates[rate->idx]; 104 if (r->flags & IEEE80211_RATE_SHORT_PREAMBLE) 105 max_txpwr = rp->cck[r->hw_value & 0x3]; 106 else 107 max_txpwr = rp->ofdm[r->hw_value & 0x7]; 108 } else { 109 max_txpwr = dev->mt76.rate_power.ofdm[rate->idx & 0x7]; 110 } 111 } 112 113 return max_txpwr; 114 } 115 116 s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr, s8 max_txpwr_adj) 117 { 118 txpwr = min_t(s8, txpwr, dev->mt76.txpower_conf); 119 txpwr -= (dev->target_power + dev->target_power_delta[0]); 120 txpwr = min_t(s8, txpwr, max_txpwr_adj); 121 122 if (!dev->enable_tpc) 123 return 0; 124 else if (txpwr >= 0) 125 return min_t(s8, txpwr, 7); 126 else 127 return (txpwr < -16) ? 8 : (txpwr + 32) / 2; 128 } 129 130 void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr) 131 { 132 s8 txpwr_adj; 133 134 txpwr_adj = mt76x02_tx_get_txpwr_adj(dev, txpwr, 135 dev->mt76.rate_power.ofdm[4]); 136 mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG, 137 MT_PROT_AUTO_TX_CFG_PROT_PADJ, txpwr_adj); 138 mt76_rmw_field(dev, MT_PROT_AUTO_TX_CFG, 139 MT_PROT_AUTO_TX_CFG_AUTO_PADJ, txpwr_adj); 140 } 141 EXPORT_SYMBOL_GPL(mt76x02_tx_set_txpwr_auto); 142 143 bool mt76x02_tx_status_data(struct mt76_dev *mdev, u8 *update) 144 { 145 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); 146 struct mt76x02_tx_status stat; 147 148 if (!mt76x02_mac_load_tx_status(dev, &stat)) 149 return false; 150 151 mt76x02_send_tx_status(dev, &stat, update); 152 153 return true; 154 } 155 EXPORT_SYMBOL_GPL(mt76x02_tx_status_data); 156 157 int mt76x02_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr, 158 struct sk_buff *skb, struct mt76_queue *q, 159 struct mt76_wcid *wcid, struct ieee80211_sta *sta, 160 u32 *tx_info) 161 { 162 struct mt76x02_dev *dev = container_of(mdev, struct mt76x02_dev, mt76); 163 struct mt76x02_txwi *txwi = txwi_ptr; 164 int qsel = MT_QSEL_EDCA; 165 int pid; 166 int ret; 167 168 if (q == &dev->mt76.q_tx[MT_TXQ_PSD] && wcid && wcid->idx < 128) 169 mt76x02_mac_wcid_set_drop(dev, wcid->idx, false); 170 171 mt76x02_mac_write_txwi(dev, txwi, skb, wcid, sta, skb->len); 172 173 pid = mt76_tx_status_skb_add(mdev, wcid, skb); 174 txwi->pktid = pid; 175 176 ret = mt76x02_insert_hdr_pad(skb); 177 if (ret < 0) 178 return ret; 179 180 if (pid && pid != MT_PACKET_ID_NO_ACK) 181 qsel = MT_QSEL_MGMT; 182 183 *tx_info = FIELD_PREP(MT_TXD_INFO_QSEL, qsel) | 184 MT_TXD_INFO_80211; 185 186 if (!wcid || wcid->hw_key_idx == 0xff || wcid->sw_iv) 187 *tx_info |= MT_TXD_INFO_WIV; 188 189 return 0; 190 } 191 EXPORT_SYMBOL_GPL(mt76x02_tx_prepare_skb); 192