f0cc5f6c0a
Backport upstream changes to initialize GDM settings and reset PPE Allow GMAC to recognize the special tag to fix PPE packet parsing Improve GRO performance by passing PPE L4 hash as skb hash Signed-off-by: Felix Fietkau <nbd@nbd.name>
83 lines
2.4 KiB
Diff
83 lines
2.4 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 4 Sep 2020 18:36:06 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: add support for coherent DMA
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It improves performance by eliminating the need for a cache flush on rx and tx
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
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+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
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@@ -357,7 +357,7 @@
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};
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cci_control2: slave-if@5000 {
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- compatible = "arm,cci-400-ctrl-if";
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+ compatible = "arm,cci-400-ctrl-if", "syscon";
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interface-type = "ace";
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reg = <0x5000 0x1000>;
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};
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@@ -967,6 +967,8 @@
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power-domains = <&scpsys MT7622_POWER_DOMAIN_ETHSYS>;
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mediatek,ethsys = <ðsys>;
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mediatek,sgmiisys = <&sgmiisys>;
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+ mediatek,cci-control = <&cci_control2>;
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+ dma-coherent;
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#address-cells = <1>;
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#size-cells = <0>;
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status = "disabled";
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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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@@ -9,6 +9,7 @@
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#include <linux/of_device.h>
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#include <linux/of_mdio.h>
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#include <linux/of_net.h>
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+#include <linux/of_address.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include <linux/clk.h>
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@@ -2486,6 +2487,12 @@ static int mtk_hw_init(struct mtk_eth *e
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if (ret)
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goto err_disable_pm;
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+ if (of_dma_is_coherent(eth->dev->of_node)) {
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+ u32 mask = ETHSYS_DMA_AG_MAP_PDMA | ETHSYS_DMA_AG_MAP_QDMA;
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+
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+ regmap_update_bits(eth->ethsys, ETHSYS_DMA_AG_MAP, mask, mask);
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+ }
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+
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if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) {
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ret = device_reset(eth->dev);
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if (ret) {
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@@ -3088,6 +3095,16 @@ static int mtk_probe(struct platform_dev
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}
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}
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+ if (of_dma_is_coherent(pdev->dev.of_node)) {
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+ struct regmap *cci;
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+
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+ cci = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
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+ "mediatek,cci-control");
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+ /* enable CPU/bus coherency */
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+ if (!IS_ERR(cci))
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+ regmap_write(cci, 0, 3);
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+ }
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+
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if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
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eth->sgmii = devm_kzalloc(eth->dev, sizeof(*eth->sgmii),
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GFP_KERNEL);
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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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@@ -426,6 +426,11 @@
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#define RSTCTRL_FE BIT(6)
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#define RSTCTRL_PPE BIT(31)
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+/* ethernet dma channel agent map */
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+#define ETHSYS_DMA_AG_MAP 0x408
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+#define ETHSYS_DMA_AG_MAP_PDMA BIT(0)
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+#define ETHSYS_DMA_AG_MAP_QDMA BIT(1)
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+
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/* SGMII subsystem config registers */
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/* Register to auto-negotiation restart */
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#define SGMSYS_PCS_CONTROL_1 0x0
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