diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7615/mac.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 122 |
1 files changed, 116 insertions, 6 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c index 423f69015e3e..ec25e5a95d44 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c @@ -249,6 +249,82 @@ static void mt7615_mac_fill_tm_rx(struct mt7615_phy *phy, __le32 *rxv) #endif } +/* The HW does not translate the mac header to 802.3 for mesh point */ +static int mt7615_reverse_frag0_hdr_trans(struct sk_buff *skb, u16 hdr_gap) +{ + struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; + struct mt7615_sta *msta = (struct mt7615_sta *)status->wcid; + struct ieee80211_sta *sta; + struct ieee80211_vif *vif; + struct ieee80211_hdr hdr; + struct ethhdr eth_hdr; + __le32 *rxd = (__le32 *)skb->data; + __le32 qos_ctrl, ht_ctrl; + + if (FIELD_GET(MT_RXD1_NORMAL_ADDR_TYPE, le32_to_cpu(rxd[1])) != + MT_RXD1_NORMAL_U2M) + return -EINVAL; + + if (!(le32_to_cpu(rxd[0]) & MT_RXD0_NORMAL_GROUP_4)) + return -EINVAL; + + if (!msta || !msta->vif) + return -EINVAL; + + sta = container_of((void *)msta, struct ieee80211_sta, drv_priv); + vif = container_of((void *)msta->vif, struct ieee80211_vif, drv_priv); + + /* store the info from RXD and ethhdr to avoid being overridden */ + memcpy(ð_hdr, skb->data + hdr_gap, sizeof(eth_hdr)); + hdr.frame_control = FIELD_GET(MT_RXD4_FRAME_CONTROL, rxd[4]); + hdr.seq_ctrl = FIELD_GET(MT_RXD6_SEQ_CTRL, rxd[6]); + qos_ctrl = FIELD_GET(MT_RXD6_QOS_CTL, rxd[6]); + ht_ctrl = FIELD_GET(MT_RXD7_HT_CONTROL, rxd[7]); + + hdr.duration_id = 0; + ether_addr_copy(hdr.addr1, vif->addr); + ether_addr_copy(hdr.addr2, sta->addr); + switch (le16_to_cpu(hdr.frame_control) & + (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { + case 0: + ether_addr_copy(hdr.addr3, vif->bss_conf.bssid); + break; + case IEEE80211_FCTL_FROMDS: + ether_addr_copy(hdr.addr3, eth_hdr.h_source); + break; + case IEEE80211_FCTL_TODS: + ether_addr_copy(hdr.addr3, eth_hdr.h_dest); + break; + case IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS: + ether_addr_copy(hdr.addr3, eth_hdr.h_dest); + ether_addr_copy(hdr.addr4, eth_hdr.h_source); + break; + default: + break; + } + + skb_pull(skb, hdr_gap + sizeof(struct ethhdr) - 2); + if (eth_hdr.h_proto == htons(ETH_P_AARP) || + eth_hdr.h_proto == htons(ETH_P_IPX)) + ether_addr_copy(skb_push(skb, ETH_ALEN), bridge_tunnel_header); + else if (eth_hdr.h_proto >= htons(ETH_P_802_3_MIN)) + ether_addr_copy(skb_push(skb, ETH_ALEN), rfc1042_header); + else + skb_pull(skb, 2); + + if (ieee80211_has_order(hdr.frame_control)) + memcpy(skb_push(skb, 2), &ht_ctrl, 2); + if (ieee80211_is_data_qos(hdr.frame_control)) + memcpy(skb_push(skb, 2), &qos_ctrl, 2); + if (ieee80211_has_a4(hdr.frame_control)) + memcpy(skb_push(skb, sizeof(hdr)), &hdr, sizeof(hdr)); + else + memcpy(skb_push(skb, sizeof(hdr) - 6), &hdr, sizeof(hdr) - 6); + + status->flag &= ~(RX_FLAG_RADIOTAP_HE | RX_FLAG_RADIOTAP_HE_MU); + return 0; +} + static int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb) { struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb; @@ -263,6 +339,7 @@ static int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb) u32 rxd2 = le32_to_cpu(rxd[2]); u32 csum_mask = MT_RXD0_NORMAL_IP_SUM | MT_RXD0_NORMAL_UDP_TCP_SUM; bool unicast, hdr_trans, remove_pad, insert_ccmp_hdr = false; + u16 hdr_gap; int phy_idx; int i, idx; u8 chfreq, amsdu_info, qos_ctl = 0; @@ -286,9 +363,16 @@ static int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb) if (rxd2 & MT_RXD2_NORMAL_AMSDU_ERR) return -EINVAL; + hdr_trans = rxd1 & MT_RXD1_NORMAL_HDR_TRANS; + if (hdr_trans && (rxd2 & MT_RXD2_NORMAL_CM)) + return -EINVAL; + + /* ICV error or CCMP/BIP/WPI MIC error */ + if (rxd2 & MT_RXD2_NORMAL_ICV_ERR) + status->flag |= RX_FLAG_ONLY_MONITOR; + unicast = (rxd1 & MT_RXD1_NORMAL_ADDR_TYPE) == MT_RXD1_NORMAL_U2M; idx = FIELD_GET(MT_RXD2_NORMAL_WLAN_IDX, rxd2); - hdr_trans = rxd1 & MT_RXD1_NORMAL_HDR_TRANS; status->wcid = mt7615_rx_get_wcid(dev, idx, unicast); if (status->wcid) { @@ -503,16 +587,42 @@ static int mt7615_mac_fill_rx(struct mt7615_dev *dev, struct sk_buff *skb) return -EINVAL; } - skb_pull(skb, (u8 *)rxd - skb->data + 2 * remove_pad); - amsdu_info = FIELD_GET(MT_RXD1_NORMAL_PAYLOAD_FORMAT, rxd1); status->amsdu = !!amsdu_info; if (status->amsdu) { status->first_amsdu = amsdu_info == MT_RXD1_FIRST_AMSDU_FRAME; status->last_amsdu = amsdu_info == MT_RXD1_LAST_AMSDU_FRAME; - if (!hdr_trans) { - memmove(skb->data + 2, skb->data, - ieee80211_get_hdrlen_from_skb(skb)); + } + + hdr_gap = (u8 *)rxd - skb->data + 2 * remove_pad; + if (hdr_trans && ieee80211_has_morefrags(fc)) { + if (mt7615_reverse_frag0_hdr_trans(skb, hdr_gap)) + return -EINVAL; + hdr_trans = false; + } else { + int pad_start = 0; + + skb_pull(skb, hdr_gap); + if (!hdr_trans && status->amsdu) { + pad_start = ieee80211_get_hdrlen_from_skb(skb); + } else if (hdr_trans && (rxd2 & MT_RXD2_NORMAL_HDR_TRANS_ERROR)) { + /* + * When header translation failure is indicated, + * the hardware will insert an extra 2-byte field + * containing the data length after the protocol + * type field. + */ + pad_start = 12; + if (get_unaligned_be16(skb->data + pad_start) == ETH_P_8021Q) + pad_start += 4; + + if (get_unaligned_be16(skb->data + pad_start) != + skb->len - pad_start - 2) + pad_start = 0; + } + + if (pad_start) { + memmove(skb->data + 2, skb->data, pad_start); skb_pull(skb, 2); } } |