diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.14/0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.14/0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.14/0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch b/target/linux/mediatek/patches-4.14/0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch new file mode 100644 index 0000000000..4f2c7b2e6e --- /dev/null +++ b/target/linux/mediatek/patches-4.14/0042-net-next-mediatek-honour-special-tag-bit-inside-RX-D.patch @@ -0,0 +1,50 @@ +From a306af3b97c56b9e224a2f9ee04838a2d32ff60b Mon Sep 17 00:00:00 2001 +From: John Crispin <john@phrozen.org> +Date: Wed, 9 Aug 2017 14:44:07 +0200 +Subject: [PATCH 42/57] net-next: mediatek: honour special tag bit inside RX + DMA descriptor + +For HW NAT/QoS to work the DSA driver needs to turn the special tag bit +inside the ingress control register on. This has the side effect that +the code working out which ingress gmac we have breaks. Fix this by +honouring the special tag bit inside the RX free descriptor. + +Signed-off-by: John Crispin <john@phrozen.org> +--- + drivers/net/ethernet/mediatek/mtk_eth_soc.c | 14 ++++++++++---- + drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 + + 2 files changed, 11 insertions(+), 4 deletions(-) + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -933,10 +933,16 @@ static int mtk_poll_rx(struct napi_struc + if (!(trxd.rxd2 & RX_DMA_DONE)) + break; + +- /* find out which mac the packet come from. values start at 1 */ +- mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & +- RX_DMA_FPORT_MASK; +- mac--; ++ /* find out which mac the packet comes from. If the special tag is ++ * we can assume that the traffic is coming from the builtin mt7530 ++ * and the DSA driver has loaded. FPORT will be the physical switch ++ * port in this case rather than the FE forward port id. */ ++ if (!(trxd.rxd4 & RX_DMA_SP_TAG)) { ++ /* values start at 1 */ ++ mac = (trxd.rxd4 >> RX_DMA_FPORT_SHIFT) & ++ RX_DMA_FPORT_MASK; ++ mac--; ++ } + + netdev = eth->netdev[mac]; + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h +@@ -284,6 +284,7 @@ + + /* QDMA descriptor rxd4 */ + #define RX_DMA_L4_VALID BIT(24) ++#define RX_DMA_SP_TAG BIT(22) + #define RX_DMA_FPORT_SHIFT 19 + #define RX_DMA_FPORT_MASK 0x7 + |