diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/729-06-v6.1-net-ethernet-mtk_eth_soc-do-not-overwrite-mtu-config.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/729-06-v6.1-net-ethernet-mtk_eth_soc-do-not-overwrite-mtu-config.patch | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/729-06-v6.1-net-ethernet-mtk_eth_soc-do-not-overwrite-mtu-config.patch b/target/linux/generic/backport-5.15/729-06-v6.1-net-ethernet-mtk_eth_soc-do-not-overwrite-mtu-config.patch new file mode 100644 index 0000000000..f9e7caa27c --- /dev/null +++ b/target/linux/generic/backport-5.15/729-06-v6.1-net-ethernet-mtk_eth_soc-do-not-overwrite-mtu-config.patch @@ -0,0 +1,98 @@ +From: Lorenzo Bianconi <lorenzo@kernel.org> +Date: Thu, 17 Nov 2022 00:35:04 +0100 +Subject: [PATCH] net: ethernet: mtk_eth_soc: do not overwrite mtu + configuration running reset routine + +Restore user configured MTU running mtk_hw_init() during tx timeout routine +since it will be overwritten after a hw reset. + +Reported-by: Felix Fietkau <nbd@nbd.name> +Fixes: 9ea4d311509f ("net: ethernet: mediatek: add the whole ethernet reset into the reset process") +Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -3175,6 +3175,30 @@ static void mtk_dim_tx(struct work_struc + dim->state = DIM_START_MEASURE; + } + ++static void mtk_set_mcr_max_rx(struct mtk_mac *mac, u32 val) ++{ ++ struct mtk_eth *eth = mac->hw; ++ u32 mcr_cur, mcr_new; ++ ++ if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) ++ return; ++ ++ mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); ++ mcr_new = mcr_cur & ~MAC_MCR_MAX_RX_MASK; ++ ++ if (val <= 1518) ++ mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1518); ++ else if (val <= 1536) ++ mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1536); ++ else if (val <= 1552) ++ mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1552); ++ else ++ mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_2048); ++ ++ if (mcr_new != mcr_cur) ++ mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); ++} ++ + static int mtk_hw_init(struct mtk_eth *eth) + { + u32 dma_mask = ETHSYS_DMA_AG_MAP_PDMA | ETHSYS_DMA_AG_MAP_QDMA | +@@ -3249,8 +3273,16 @@ static int mtk_hw_init(struct mtk_eth *e + * up with the more appropriate value when mtk_mac_config call is being + * invoked. + */ +- for (i = 0; i < MTK_MAC_COUNT; i++) ++ for (i = 0; i < MTK_MAC_COUNT; i++) { ++ struct net_device *dev = eth->netdev[i]; ++ + mtk_w32(eth, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(i)); ++ if (dev) { ++ struct mtk_mac *mac = netdev_priv(dev); ++ ++ mtk_set_mcr_max_rx(mac, dev->mtu + MTK_RX_ETH_HLEN); ++ } ++ } + + /* Indicates CDM to parse the MTK special tag from CPU + * which also is working out for untag packets. +@@ -3366,7 +3398,6 @@ static int mtk_change_mtu(struct net_dev + int length = new_mtu + MTK_RX_ETH_HLEN; + struct mtk_mac *mac = netdev_priv(dev); + struct mtk_eth *eth = mac->hw; +- u32 mcr_cur, mcr_new; + + if (rcu_access_pointer(eth->prog) && + length > MTK_PP_MAX_BUF_SIZE) { +@@ -3374,23 +3405,7 @@ static int mtk_change_mtu(struct net_dev + return -EINVAL; + } + +- if (!MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628)) { +- mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id)); +- mcr_new = mcr_cur & ~MAC_MCR_MAX_RX_MASK; +- +- if (length <= 1518) +- mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1518); +- else if (length <= 1536) +- mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1536); +- else if (length <= 1552) +- mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_1552); +- else +- mcr_new |= MAC_MCR_MAX_RX(MAC_MCR_MAX_RX_2048); +- +- if (mcr_new != mcr_cur) +- mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id)); +- } +- ++ mtk_set_mcr_max_rx(mac, length); + dev->mtu = new_mtu; + + return 0; |