target/linux/generic/backport-5.15/702-v5.19-33-net-ethernet-mtk_eth_soc-enable-rx-cksum-offload-for.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Mon, 6 Jun 2022 21:49:00 +0200
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: enable rx cksum offload for
   4  MTK_NETSYS_V2
   5
   6 Enable rx checksum offload for mt7986 chipset.
   7
   8 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
   9 Link: https://lore.kernel.org/r/c8699805c18f7fd38315fcb8da2787676d83a32c.1654544585.git.lorenzo@kernel.org
  10 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  11 ---
  12
  13 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  14 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  15 @@ -1463,8 +1463,8 @@ static int mtk_poll_rx(struct napi_struc
  16         int done = 0, bytes = 0;
  17
  18         while (done < budget) {
  19 +               unsigned int pktlen, *rxdcsum;
  20                 struct net_device *netdev;
  21 -               unsigned int pktlen;
  22                 dma_addr_t dma_addr;
  23                 u32 hash, reason;
  24                 int mac = 0;
  25 @@ -1531,7 +1531,13 @@ static int mtk_poll_rx(struct napi_struc
  26                 pktlen = RX_DMA_GET_PLEN0(trxd.rxd2);
  27                 skb->dev = netdev;
  28                 skb_put(skb, pktlen);
  29 -               if (trxd.rxd4 & eth->soc->txrx.rx_dma_l4_valid)
  30 +
  31 +               if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2))
  32 +                       rxdcsum = &trxd.rxd3;
  33 +               else
  34 +                       rxdcsum = &trxd.rxd4;
  35 +
  36 +               if (*rxdcsum & eth->soc->txrx.rx_dma_l4_valid)
  37                         skb->ip_summed = CHECKSUM_UNNECESSARY;
  38                 else
  39                         skb_checksum_none_assert(skb);
  40 @@ -3752,6 +3758,7 @@ static const struct mtk_soc_data mt7986_
  41                 .txd_size = sizeof(struct mtk_tx_dma_v2),
  42                 .rxd_size = sizeof(struct mtk_rx_dma_v2),
  43                 .rx_irq_done_mask = MTK_RX_DONE_INT_V2,
  44 +               .rx_dma_l4_valid = RX_DMA_L4_VALID_V2,
  45                 .dma_max_len = MTK_TX_DMA_BUF_LEN_V2,
  46                 .dma_len_offset = 8,
  47         },