diff options
| author | Shiji Yang <yangshiji66@outlook.com> | 2026-08-19 21:07:07 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-08-24 11:10:54 -0700 |
| commit | c0ef04232f9fac083c3d8a77ce58ba32243e6734 (patch) | |
| tree | 50407791ccd36b3df8bb15fbac62cd29219d5489 /drivers | |
| parent | 7cbfb180945ce529608e4d4e24a6d483699fab1e (diff) | |
| download | linux-c0ef04232f9fac083c3d8a77ce58ba32243e6734.tar.gz linux-c0ef04232f9fac083c3d8a77ce58ba32243e6734.zip | |
net: ethernet: mtk_wed: increase WED v2 WDMA RESV_BUFF to 0x80
Change WDMA RESV_BUFF from 0x40 to 0x80 to avoid CDM TX FIFO overflow.
Without this patch mt7986 and mt7981 may have WDMA TX hang issue. This
patch was pulled from mtk-openwrt-feeds GPL open source project.
Link: https://github.com/mediatek/mtk-openwrt-feeds/commit/07c87502e854b68b48544d101b6fe17ec059b97b
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/OSZPR01MB779537889255E2F606E47EABBCA52@OSZPR01MB7795.jpnprd01.prod.outlook.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_wed.c | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_wed_regs.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c index 10d9beaae372..53d3b7e00e1c 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed.c +++ b/drivers/net/ethernet/mediatek/mtk_wed.c @@ -2071,6 +2071,11 @@ mtk_wed_dma_enable(struct mtk_wed_device *dev) wdma_set(dev, MTK_WDMA_GLO_CFG, MTK_WDMA_GLO_CFG_TX_DMA_EN); } + if (mtk_wed_is_v2(dev->hw)) + wdma_m32(dev, MTK_WDMA_GLO_CFG, + MTK_WDMA_GLO_CFG_RESV_BUFF, + FIELD_PREP(MTK_WDMA_GLO_CFG_RESV_BUFF, 0x80)); + wed_set(dev, MTK_WED_GLO_CFG, MTK_WED_GLO_CFG_TX_DMA_EN | MTK_WED_GLO_CFG_RX_DMA_EN); diff --git a/drivers/net/ethernet/mediatek/mtk_wed_regs.h b/drivers/net/ethernet/mediatek/mtk_wed_regs.h index c71190924816..e5f83100ded5 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed_regs.h +++ b/drivers/net/ethernet/mediatek/mtk_wed_regs.h @@ -433,6 +433,7 @@ struct mtk_wdma_desc { #define MTK_WDMA_GLO_CFG_TX_DMA_BUSY BIT(1) #define MTK_WDMA_GLO_CFG_RX_DMA_EN BIT(2) #define MTK_WDMA_GLO_CFG_RX_DMA_BUSY BIT(3) +#define MTK_WDMA_GLO_CFG_RESV_BUFF GENMASK(23, 16) #define MTK_WDMA_GLO_CFG_RX_INFO3_PRERES BIT(26) #define MTK_WDMA_GLO_CFG_RX_INFO2_PRERES BIT(27) #define MTK_WDMA_GLO_CFG_RX_INFO1_PRERES BIT(28) |