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From: Vladimir Oltean <olteanv@gmail.com>
To: Felix Fietkau <nbd@nbd.name>
Cc: netdev@vger.kernel.org, John Crispin <john@phrozen.org>,
	Sean Wang <sean.wang@mediatek.com>,
	Mark Lee <Mark-MC.Lee@mediatek.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 01/14] net: ethernet: mtk_eth_soc: account for vlan in rx header length
Date: Mon, 7 Nov 2022 22:55:53 +0200	[thread overview]
Message-ID: <20221107205553.cnydzeh3tmilqblx@skbuf> (raw)
In-Reply-To: <20221107185452.90711-1-nbd@nbd.name>

On Mon, Nov 07, 2022 at 07:54:39PM +0100, Felix Fietkau wrote:
> This may be needed for correct MTU settings on devices using DSA
> 
> Signed-off-by: Felix Fietkau <nbd@nbd.name>
> ---
>  drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
> index 589f27ddc401..dcf2a0d5da33 100644
> --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
> +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
> @@ -29,7 +29,7 @@
>  #define MTK_TX_DMA_BUF_LEN_V2	0xffff
>  #define MTK_DMA_SIZE		512
>  #define MTK_MAC_COUNT		2
> -#define MTK_RX_ETH_HLEN		(ETH_HLEN + ETH_FCS_LEN)
> +#define MTK_RX_ETH_HLEN		(VLAN_ETH_HLEN + ETH_HLEN + ETH_FCS_LEN)

Commit title says account for VLAN (VLAN_HLEN, 4 bytes), code says add
VLAN_ETH_HLEN (18) more bytes.

Also, why is DSA mentioned in the commit message? Is accounting for VLAN
hlen not needed if DSA is not used? Why?

>  #define MTK_RX_HLEN		(NET_SKB_PAD + MTK_RX_ETH_HLEN + NET_IP_ALIGN)
>  #define MTK_DMA_DUMMY_DESC	0xffffffff
>  #define MTK_DEFAULT_MSG_ENABLE	(NETIF_MSG_DRV | \
> -- 
> 2.38.1
> 

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  parent reply	other threads:[~2022-11-07 20:57 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-07 18:54 [PATCH 01/14] net: ethernet: mtk_eth_soc: account for vlan in rx header length Felix Fietkau
2022-11-07 18:54 ` [PATCH 02/14] net: ethernet: mtk_eth_soc: increase tx ring side for QDMA devices Felix Fietkau
2022-11-07 18:54 ` [PATCH 03/14] net: ethernet: mtk_eth_soc: avoid port_mg assignment on MT7622 and newer Felix Fietkau
2022-11-07 18:54 ` [PATCH 04/14] net: ethernet: mtk_eth_soc: implement multi-queue support for per-port queues Felix Fietkau
2022-11-07 18:54 ` [PATCH 05/14] net: dsa: tag_mtk: assign " Felix Fietkau
2022-11-07 20:40   ` Vladimir Oltean
2022-11-08  6:18     ` Felix Fietkau
2022-11-07 21:22   ` Vladimir Oltean
2022-11-08  6:01     ` Felix Fietkau
2022-11-08  7:58       ` Vladimir Oltean
2022-11-08  9:20         ` Felix Fietkau
2022-11-07 18:54 ` [PATCH 06/14] net: ethernet: mediatek: ppe: assign per-port queues for offloaded traffic Felix Fietkau
2022-11-07 18:54 ` [PATCH 07/14] net: ethernet: mtk_eth_soc: compile out netsys v2 code on mt7621 Felix Fietkau
2022-11-07 18:54 ` [PATCH 10/14] net: dsa: tag_mtk: parse hwaccel VLAN tags Felix Fietkau
2022-11-07 18:54 ` [PATCH 11/14] net: ethernet: mtk_eth_soc: fix VLAN rx hardware acceleration Felix Fietkau
2022-11-07 23:32   ` Vladimir Oltean
2022-11-08  6:17     ` Felix Fietkau
2022-11-07 18:54 ` [PATCH 12/14] net: ethernet: mtk_eth_soc: work around issue with sending small fragments Felix Fietkau
2022-11-07 18:54 ` [PATCH 13/14] net: ethernet: mtk_eth_soc: set NETIF_F_ALL_TSO Felix Fietkau
2022-11-07 18:54 ` [PATCH 14/14] net: ethernet: mtk_eth_soc: drop packets to WDMA if the ring is full Felix Fietkau
2022-11-07 20:55 ` Vladimir Oltean [this message]
2022-11-08  6:18   ` [PATCH 01/14] net: ethernet: mtk_eth_soc: account for vlan in rx header length Felix Fietkau

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