Commit 804775df authored by Felix Fietkau's avatar Felix Fietkau Committed by David S. Miller
Browse files

net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED) 



The Wireless Ethernet Dispatch subsystem on the MT7622 SoC can be
configured to intercept and handle access to the DMA queues and
PCIe interrupts for a MT7615/MT7915 wireless card.
It can manage the internal WDMA (Wireless DMA) controller, which allows
ethernet packets to be passed from the packet switch engine (PSE) to the
wireless card, bypassing the CPU entirely.
This can be used to implement hardware flow offloading from ethernet to
WLAN.

Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f14ac41b

drivers/net/ethernet/mediatek/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -7,6 +7,10 @@ config NET_VENDOR_MEDIATEK 


if NET_VENDOR_MEDIATEK



config NET_MEDIATEK_SOC_WED

	depends on ARCH_MEDIATEK || COMPILE_TEST

	def_bool NET_MEDIATEK_SOC != n



config NET_MEDIATEK_SOC

	tristate "MediaTek SoC Gigabit Ethernet support"

	depends on NET_DSA || !NET_DSA

drivers/net/ethernet/mediatek/Makefile

+5 −0
Original line number Diff line number Diff line
@@ -5,4 +5,9 @@ 


obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth.o

mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o mtk_ppe_debugfs.o mtk_ppe_offload.o

mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o

ifdef CONFIG_DEBUG_FS

mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed_debugfs.o

endif

obj-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed_ops.o

obj-$(CONFIG_NET_MEDIATEK_STAR_EMAC) += mtk_star_emac.o

drivers/net/ethernet/mediatek/mtk_eth_soc.c

+17 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <net/dsa.h>



#include "mtk_eth_soc.h"

#include "mtk_wed.h"



static int mtk_msg_level = -1;

module_param_named(msg_level, mtk_msg_level, int, 0);
@@ -3170,6 +3171,22 @@ static int mtk_probe(struct platform_device *pdev) 
		}

	}



	for (i = 0;; i++) {

		struct device_node *np = of_parse_phandle(pdev->dev.of_node,

							  "mediatek,wed", i);

		static const u32 wdma_regs[] = {

			MTK_WDMA0_BASE,

			MTK_WDMA1_BASE

		};

		void __iomem *wdma;



		if (!np || i >= ARRAY_SIZE(wdma_regs))

			break;



		wdma = eth->base + wdma_regs[i];

		mtk_wed_add_hw(np, eth, wdma, i);

	}



	for (i = 0; i < 3; i++) {

		if (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_INT) && i > 0)

			eth->irq[i] = eth->irq[0];

drivers/net/ethernet/mediatek/mtk_eth_soc.h

+3 −0
Original line number Diff line number Diff line
@@ -295,6 +295,9 @@ 
#define MTK_GDM1_TX_GPCNT	0x2438

#define MTK_STAT_OFFSET		0x40



#define MTK_WDMA0_BASE		0x2800

#define MTK_WDMA1_BASE		0x2c00



/* QDMA descriptor txd4 */

#define TX_DMA_CHKSUM		(0x7 << 29)

#define TX_DMA_TSO		BIT(28)

drivers/net/ethernet/mediatek/mtk_wed.c

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File added.

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