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net-next: ethernet: mediatek: add CDM able to recognize the tag for DSA

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The patch adds the setup for allowing CDM can recognize these packets with
carrying port-distinguishing tag. Otherwise, these tagging packets will be
handled incorrectly by CDM. The setup is also working out for general
untag packets as well.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Landen Chao <Landen.Chao@mediatek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sean Wang 2017-04-07 16:45:07 +08:00 committed by David S. Miller
parent 5cd8985a19
commit 87e3df4961
2 changed files with 10 additions and 0 deletions
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6
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View file

@ -1846,6 +1846,12 @@ static int mtk_hw_init(struct mtk_eth *eth)
/* GE2, Force 1000M/FD, FC ON */
mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(1));
/* Indicates CDM to parse the MTK special tag from CPU
* which also is working out for untag packets.
*/
val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
/* Enable RX VLan Offloading */
mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);

4
drivers/net/ethernet/mediatek/mtk_eth_soc.h
View file

@ -70,6 +70,10 @@
/* Frame Engine Interrupt Grouping Register */
#define MTK_FE_INT_GRP 0x20
/* CDMP Ingress Control Register */
#define MTK_CDMQ_IG_CTRL 0x1400
#define MTK_CDMQ_STAG_EN BIT(0)
/* CDMP Exgress Control Register */
#define MTK_CDMP_EG_CTRL 0x404