From 0d6f20723047c02bd624f0384df9dc74ee075bc7 Mon Sep 17 00:00:00 2001 From: Ilya Lipnitskiy Date: Fri, 23 Apr 2021 17:19:22 -0700 Subject: kernel: backport mtk_soc_eth fixes from v5.13 Fixes logic that leads to this error when booting mt7621 and other devices that use the mediatek ethernet driver: [ 23.144378] mtk_soc_eth 1e100000.ethernet: PPE table busy The rest are mostly moved from pending-5.10 to backport-5.10 with a couple of cleanups and improvements from upstream. Refresh patches. Links: https://git.kernel.org/netdev/net-next/c/c5d66587b890 https://git.kernel.org/netdev/net-next/c/3f57d8c40fea https://git.kernel.org/netdev/net-next/c/5196c4178549 https://git.kernel.org/netdev/net-next/c/787082ab9f7b https://git.kernel.org/netdev/net-next/c/c30c4a827390 https://git.kernel.org/netdev/net-next/c/3630d519d7c3 https://git.kernel.org/netdev/net-next/c/16ef670789b2 https://git.kernel.org/netdev/net-next/c/59555a8d0dd3 https://git.kernel.org/netdev/net-next/c/6b4423b258b9 https://git.kernel.org/netdev/net-next/c/e9229ffd550b https://git.kernel.org/netdev/net-next/c/4e6bf609569c https://git.kernel.org/netdev/net-next/c/816ac3e6e67b https://git.kernel.org/netdev/net-next/c/16769a8923fa https://git.kernel.org/netdev/net-next/c/db2c7b353db3 https://git.kernel.org/netdev/net-next/c/fa817272c37e https://git.kernel.org/netdev/net-next/c/3bc8e0aff23b Fixes: f07fe36f22fc ("kernel: update flow offload patches to upstream version") Cc: Felix Fietkau Signed-off-by: Ilya Lipnitskiy --- ...t-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 target/linux/generic/backport-5.10/610-v5.13-51-net-ethernet-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch (limited to 'target/linux/generic/backport-5.10/610-v5.13-51-net-ethernet-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch') diff --git a/target/linux/generic/backport-5.10/610-v5.13-51-net-ethernet-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch b/target/linux/generic/backport-5.10/610-v5.13-51-net-ethernet-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch new file mode 100644 index 0000000000..fd2fb0f7c4 --- /dev/null +++ b/target/linux/generic/backport-5.10/610-v5.13-51-net-ethernet-mtk_eth_soc-use-iopoll.h-macro-for-DMA-.patch @@ -0,0 +1,71 @@ +From 3bc8e0aff23be0526af0dbc7973a8866a08d73f1 Mon Sep 17 00:00:00 2001 +From: Ilya Lipnitskiy +Date: Thu, 22 Apr 2021 22:21:08 -0700 +Subject: [PATCH] net: ethernet: mtk_eth_soc: use iopoll.h macro for DMA init + +Replace a tight busy-wait loop without a pause with a standard +readx_poll_timeout_atomic routine with a 5 us poll period. + +Tested by booting a MT7621 device to ensure the driver initializes +properly. + +Signed-off-by: Ilya Lipnitskiy +Reviewed-by: Andrew Lunn +Signed-off-by: David S. Miller +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 29 +++++++++------------ + drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 +- + 2 files changed, 14 insertions(+), 17 deletions(-) + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -2033,25 +2033,22 @@ static int mtk_set_features(struct net_d + /* wait for DMA to finish whatever it is doing before we start using it again */ + static int mtk_dma_busy_wait(struct mtk_eth *eth) + { +- unsigned long t_start = jiffies; ++ unsigned int reg; ++ int ret; ++ u32 val; + +- while (1) { +- if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { +- if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & +- (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) +- return 0; +- } else { +- if (!(mtk_r32(eth, MTK_PDMA_GLO_CFG) & +- (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) +- return 0; +- } ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) ++ reg = MTK_QDMA_GLO_CFG; ++ else ++ reg = MTK_PDMA_GLO_CFG; + +- if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) +- break; +- } ++ ret = readx_poll_timeout_atomic(__raw_readl, eth->base + reg, val, ++ !(val & (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)), ++ 5, MTK_DMA_BUSY_TIMEOUT_US); ++ if (ret) ++ dev_err(eth->dev, "DMA init timeout\n"); + +- dev_err(eth->dev, "DMA init timeout\n"); +- return -1; ++ return ret; + } + + static int mtk_dma_init(struct mtk_eth *eth) +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h +@@ -213,7 +213,7 @@ + #define MTK_TX_DMA_BUSY BIT(1) + #define MTK_RX_DMA_EN BIT(2) + #define MTK_TX_DMA_EN BIT(0) +-#define MTK_DMA_BUSY_TIMEOUT HZ ++#define MTK_DMA_BUSY_TIMEOUT_US 1000000 + + /* QDMA Reset Index Register */ + #define MTK_QDMA_RST_IDX 0x1A08 -- cgit v1.2.3