diff options
author | Lorenzo Bianconi | 2022-11-17 00:35:04 +0100 |
---|---|---|
committer | Greg Kroah-Hartman | 2022-12-31 13:32:12 +0100 |
commit | 2bf8461ee33c30a5a53d9ed6df780dc5c35d7c4f (patch) | |
tree | 4e4f6444bf8243f963e14bdfa416a4e349e0da45 /drivers/net | |
parent | 38e2a92cd174b6abd6de1cca758140b0a0d31355 (diff) |
net: ethernet: mtk_eth_soc: do not overwrite mtu configuration running reset routine
[ Upstream commit b677d6c7a695dad1b02d2e0e428c39b3b344f270 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.c | 53 |
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 1d36619c5ec9..1148e22001c0 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -3229,6 +3229,30 @@ static void mtk_dim_tx(struct work_struct *work) 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 | @@ -3303,8 +3327,16 @@ static int mtk_hw_init(struct mtk_eth *eth) * 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. @@ -3420,7 +3452,6 @@ static int mtk_change_mtu(struct net_device *dev, int new_mtu) 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) { @@ -3428,23 +3459,7 @@ static int mtk_change_mtu(struct net_device *dev, int new_mtu) 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; |