diff options
Diffstat (limited to 'target/linux/mediatek/patches-5.4/1012-pci-pcie-mediatek-add-support-for-coherent-DMA.patch')
| -rw-r--r-- | target/linux/mediatek/patches-5.4/1012-pci-pcie-mediatek-add-support-for-coherent-DMA.patch | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/target/linux/mediatek/patches-5.4/1012-pci-pcie-mediatek-add-support-for-coherent-DMA.patch b/target/linux/mediatek/patches-5.4/1012-pci-pcie-mediatek-add-support-for-coherent-DMA.patch deleted file mode 100644 index 20a67676e3..0000000000 --- a/target/linux/mediatek/patches-5.4/1012-pci-pcie-mediatek-add-support-for-coherent-DMA.patch +++ /dev/null @@ -1,108 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Date: Fri, 4 Sep 2020 18:42:42 +0200 -Subject: [PATCH] pci: pcie-mediatek: add support for coherent DMA - -It improves performance by eliminating the need for a cache flush for DMA on -attached devices - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - ---- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi -+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi -@@ -805,6 +805,8 @@ - reg = <0 0x1a143000 0 0x1000>; - reg-names = "port0"; - mediatek,pcie-cfg = <&pciecfg>; -+ mediatek,hifsys = <&hifsys>; -+ mediatek,cci-control = <&cci_control2>; - #address-cells = <3>; - #size-cells = <2>; - interrupts = <GIC_SPI 228 IRQ_TYPE_LEVEL_LOW>; -@@ -822,6 +824,7 @@ - bus-range = <0x00 0xff>; - ranges = <0x82000000 0 0x20000000 0x0 0x20000000 0 0x8000000>; - status = "disabled"; -+ dma-coherent; - - slot0: pcie@0,0 { - reg = <0x0000 0 0 0 0>; -@@ -848,6 +851,8 @@ - reg = <0 0x1a145000 0 0x1000>; - reg-names = "port1"; - mediatek,pcie-cfg = <&pciecfg>; -+ mediatek,hifsys = <&hifsys>; -+ mediatek,cci-control = <&cci_control2>; - #address-cells = <3>; - #size-cells = <2>; - interrupts = <GIC_SPI 229 IRQ_TYPE_LEVEL_LOW>; -@@ -866,6 +871,7 @@ - bus-range = <0x00 0xff>; - ranges = <0x82000000 0 0x28000000 0x0 0x28000000 0 0x8000000>; - status = "disabled"; -+ dma-coherent; - - slot1: pcie@1,0 { - reg = <0x0800 0 0 0 0>; -@@ -925,6 +931,11 @@ - }; - }; - -+ hifsys: syscon@1af00000 { -+ compatible = "mediatek,mt7622-hifsys", "syscon"; -+ reg = <0 0x1af00000 0 0x70>; -+ }; -+ - ethsys: syscon@1b000000 { - compatible = "mediatek,mt7622-ethsys", - "syscon"; ---- a/drivers/pci/controller/pcie-mediatek.c -+++ b/drivers/pci/controller/pcie-mediatek.c -@@ -20,6 +20,7 @@ - #include <linux/of_address.h> - #include <linux/of_pci.h> - #include <linux/of_platform.h> -+#include <linux/of_address.h> - #include <linux/pci.h> - #include <linux/phy/phy.h> - #include <linux/platform_device.h> -@@ -139,6 +140,11 @@ - #define PCIE_LINK_STATUS_V2 0x804 - #define PCIE_PORT_LINKUP_V2 BIT(10) - -+/* DMA channel mapping */ -+#define HIFSYS_DMA_AG_MAP 0x008 -+#define HIFSYS_DMA_AG_MAP_PCIE0 BIT(0) -+#define HIFSYS_DMA_AG_MAP_PCIE1 BIT(1) -+ - struct mtk_pcie_port; - - /** -@@ -1068,6 +1074,27 @@ static int mtk_pcie_setup(struct mtk_pci - } - } - -+ if (of_dma_is_coherent(node)) { -+ struct regmap *con; -+ u32 mask; -+ -+ con = syscon_regmap_lookup_by_phandle(node, -+ "mediatek,cci-control"); -+ /* enable CPU/bus coherency */ -+ if (!IS_ERR(con)) -+ regmap_write(con, 0, 3); -+ -+ con = syscon_regmap_lookup_by_phandle(node, -+ "mediatek,hifsys"); -+ if (IS_ERR(con)) { -+ dev_err(dev, "missing hifsys node\n"); -+ return PTR_ERR(con); -+ } -+ -+ mask = HIFSYS_DMA_AG_MAP_PCIE0 | HIFSYS_DMA_AG_MAP_PCIE1; -+ regmap_update_bits(con, HIFSYS_DMA_AG_MAP, mask, mask); -+ } -+ - for_each_available_child_of_node(node, child) { - int slot; - |