From 040b97be60567b819b97442d30533884bd266874 Mon Sep 17 00:00:00 2001 From: Jes Sorensen Date: Mon, 27 Jun 2016 12:32:03 -0400 Subject: [PATCH] rtl8xxxu: Add support for aggregated RX packets on gen1 parts This implements support for demuxing aggregated RX packets on gen1 devices, using the rxdesc16 format. So far this has only been tested with rtl8723au devices. Signed-off-by: Jes Sorensen Signed-off-by: Kalle Valo --- .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 103 ++++++++++++------ 1 file changed, 69 insertions(+), 34 deletions(-) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index 400deea9c6a9..8643bb3c1802 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -5093,53 +5093,88 @@ static void rtl8723bu_handle_c2h(struct rtl8xxxu_priv *priv, int rtl8xxxu_parse_rxdesc16(struct rtl8xxxu_priv *priv, struct sk_buff *skb) { struct ieee80211_hw *hw = priv->hw; - struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); - struct rtl8xxxu_rxdesc16 *rx_desc = - (struct rtl8xxxu_rxdesc16 *)skb->data; + struct ieee80211_rx_status *rx_status; + struct rtl8xxxu_rxdesc16 *rx_desc; struct rtl8723au_phy_stats *phy_stats; - __le32 *_rx_desc_le = (__le32 *)skb->data; - u32 *_rx_desc = (u32 *)skb->data; + struct sk_buff *next_skb = NULL; + __le32 *_rx_desc_le; + u32 *_rx_desc; int drvinfo_sz, desc_shift; - int i; + int i, pkt_cnt, pkt_len, urb_len, pkt_offset; - for (i = 0; i < (sizeof(struct rtl8xxxu_rxdesc16) / sizeof(u32)); i++) - _rx_desc[i] = le32_to_cpu(_rx_desc_le[i]); + urb_len = skb->len; + pkt_cnt = 0; - memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); + do { + rx_desc = (struct rtl8xxxu_rxdesc16 *)skb->data; + _rx_desc_le = (__le32 *)skb->data; + _rx_desc = (u32 *)skb->data; - skb_pull(skb, sizeof(struct rtl8xxxu_rxdesc16)); + for (i = 0; + i < (sizeof(struct rtl8xxxu_rxdesc16) / sizeof(u32)); i++) + _rx_desc[i] = le32_to_cpu(_rx_desc_le[i]); - phy_stats = (struct rtl8723au_phy_stats *)skb->data; + /* + * Only read pkt_cnt from the header if we're parsing the + * first packet + */ + if (!pkt_cnt) + pkt_cnt = rx_desc->pkt_cnt; + pkt_len = rx_desc->pktlen; - drvinfo_sz = rx_desc->drvinfo_sz * 8; - desc_shift = rx_desc->shift; - skb_pull(skb, drvinfo_sz + desc_shift); + drvinfo_sz = rx_desc->drvinfo_sz * 8; + desc_shift = rx_desc->shift; + pkt_offset = roundup(pkt_len + drvinfo_sz + desc_shift + + sizeof(struct rtl8xxxu_rxdesc16), 128); - if (rx_desc->phy_stats) - rtl8xxxu_rx_parse_phystats(priv, rx_status, phy_stats, - rx_desc->rxmcs); + if (pkt_cnt > 1) + next_skb = skb_clone(skb, GFP_ATOMIC); - rx_status->mactime = le32_to_cpu(rx_desc->tsfl); - rx_status->flag |= RX_FLAG_MACTIME_START; + rx_status = IEEE80211_SKB_RXCB(skb); + memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); - if (!rx_desc->swdec) - rx_status->flag |= RX_FLAG_DECRYPTED; - if (rx_desc->crc32) - rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; - if (rx_desc->bw) - rx_status->flag |= RX_FLAG_40MHZ; + skb_pull(skb, sizeof(struct rtl8xxxu_rxdesc16)); - if (rx_desc->rxht) { - rx_status->flag |= RX_FLAG_HT; - rx_status->rate_idx = rx_desc->rxmcs - DESC_RATE_MCS0; - } else { - rx_status->rate_idx = rx_desc->rxmcs; - } + phy_stats = (struct rtl8723au_phy_stats *)skb->data; - rx_status->freq = hw->conf.chandef.chan->center_freq; - rx_status->band = hw->conf.chandef.chan->band; + skb_pull(skb, drvinfo_sz + desc_shift); + + skb_trim(skb, pkt_len); + + if (rx_desc->phy_stats) + rtl8xxxu_rx_parse_phystats(priv, rx_status, phy_stats, + rx_desc->rxmcs); + + rx_status->mactime = le32_to_cpu(rx_desc->tsfl); + rx_status->flag |= RX_FLAG_MACTIME_START; + + if (!rx_desc->swdec) + rx_status->flag |= RX_FLAG_DECRYPTED; + if (rx_desc->crc32) + rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; + if (rx_desc->bw) + rx_status->flag |= RX_FLAG_40MHZ; + + if (rx_desc->rxht) { + rx_status->flag |= RX_FLAG_HT; + rx_status->rate_idx = rx_desc->rxmcs - DESC_RATE_MCS0; + } else { + rx_status->rate_idx = rx_desc->rxmcs; + } + + rx_status->freq = hw->conf.chandef.chan->center_freq; + rx_status->band = hw->conf.chandef.chan->band; + + ieee80211_rx_irqsafe(hw, skb); + + skb = next_skb; + if (skb) + skb_pull(next_skb, pkt_offset); + + pkt_cnt--; + urb_len -= pkt_offset; + } while (skb && urb_len > 0 && pkt_cnt > 0); - ieee80211_rx_irqsafe(hw, skb); return RX_TYPE_DATA_PKT; } -- 2.20.1