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49 lines
1.7 KiB
Diff
49 lines
1.7 KiB
Diff
From de3c04b820e1d396bf12e88ea87271a84f6fedb7 Mon Sep 17 00:00:00 2001
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From: Sean Wang <sean.wang@mediatek.com>
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Date: Wed, 29 Mar 2017 17:38:21 +0800
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Subject: [PATCH 29/57] net-next: ethernet: mediatek: add CDM able to recognize
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the tag for DSA
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The patch adds the setup for allowing CDM can recognize these packets with
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carrying port-distinguishing tag. Otherwise, these tagging packets will be
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handled incorrectly by CDM. The setup is also working out for general
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untag packets as well.
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Signed-off-by: Sean Wang <sean.wang@mediatek.com>
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Signed-off-by: Landen Chao <Landen.Chao@mediatek.com>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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---
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drivers/net/ethernet/mediatek/mtk_eth_soc.c | 6 ++++++
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drivers/net/ethernet/mediatek/mtk_eth_soc.h | 4 ++++
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2 files changed, 10 insertions(+)
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -1864,6 +1864,12 @@ static int mtk_hw_init(struct mtk_eth *e
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val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
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mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
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+ /* Indicates CDM to parse the MTK special tag from CPU
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+ * which also is working out for untag packets.
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+ */
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+ val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
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+ mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
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+
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/* Enable RX VLan Offloading */
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mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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@@ -74,6 +74,10 @@
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#define MTK_CDMQ_IG_CTRL 0x1400
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#define MTK_CDMQ_STAG_EN BIT(0)
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+/* CDMP Ingress Control Register */
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+#define MTK_CDMQ_IG_CTRL 0x1400
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+#define MTK_CDMQ_STAG_EN BIT(0)
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+
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/* CDMP Exgress Control Register */
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#define MTK_CDMP_EG_CTRL 0x404
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