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| author | Vittorio Gambaletta <openwrt@vittgam.net> | 2017-03-25 18:08:02 +0100 |
|---|---|---|
| committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2017-12-29 15:17:07 +0100 |
| commit | d40a358136fdc19e6af13921867ed93444c08827 (patch) | |
| tree | 96c1329b8dd55d991621b48303b88b345dcf2cc4 /target/linux/ar71xx/files | |
| parent | 8170f280c4c8e45a50e9d4942e7358e1271e697f (diff) | |
| download | upstream-d40a358136fdc19e6af13921867ed93444c08827.tar.gz upstream-d40a358136fdc19e6af13921867ed93444c08827.tar.bz2 upstream-d40a358136fdc19e6af13921867ed93444c08827.zip | |
ag71xx: Fix rx ring buffer stall on small packets flood on qca956x and qca953x.
Backported from Code Aurora QSDK
Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
Diffstat (limited to 'target/linux/ar71xx/files')
3 files changed, 22 insertions, 1 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c index a8b19b68b2..427de6a50d 100644 --- a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c +++ b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c @@ -996,6 +996,9 @@ void __init ath79_register_eth(unsigned int id) pdata->reset_bit = AR934X_RESET_GE0_MAC | AR934X_RESET_GE0_MDIO; pdata->set_speed = ar934x_set_speed_ge0; + + if (ath79_soc == ATH79_SOC_QCA9533) + pdata->disable_inline_checksum_engine = 1; } else { pdata->reset_bit = AR934X_RESET_GE1_MAC | AR934X_RESET_GE1_MDIO; @@ -1097,6 +1100,8 @@ void __init ath79_register_eth(unsigned int id) pdata->set_speed = qca956x_set_speed_sgmii; else pdata->set_speed = ar934x_set_speed_ge0; + + pdata->disable_inline_checksum_engine = 1; } else { pdata->reset_bit = QCA955X_RESET_GE1_MAC | QCA955X_RESET_GE1_MDIO; diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ath79/ag71xx_platform.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ath79/ag71xx_platform.h index 078fa157f2..5fdc59c7b7 100644 --- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ath79/ag71xx_platform.h +++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ath79/ag71xx_platform.h @@ -37,7 +37,7 @@ struct ag71xx_platform_data { u8 is_ar724x:1; u8 has_ar8216:1; u8 use_flow_control:1; - u8 is_qca956x:1; + u8 disable_inline_checksum_engine:1; struct ag71xx_switch_platform_data *switch_data; diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c index 566e9513d8..72dd654a69 100644 --- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c @@ -629,6 +629,22 @@ __ag71xx_link_adjust(struct ag71xx *ag, bool update) ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2); ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5); ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl); + + if (pdata->disable_inline_checksum_engine) { + /* + * The rx ring buffer can stall on small packets on QCA953x and + * QCA956x. Disabling the inline checksum engine fixes the stall. + * The wr, rr functions cannot be used since this hidden register + * is outside of the normal ag71xx register block. + */ + void __iomem *dam = ioremap_nocache(0xb90001bc, 0x4); + if (dam) { + __raw_writel(__raw_readl(dam) & ~BIT(27), dam); + (void)__raw_readl(dam); + iounmap(dam); + } + } + ag71xx_hw_start(ag); netif_carrier_on(ag->dev); |