diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/770-07-net-ethernet-mtk_eth_soc-drop-descriptor-cpu-own-bit.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/770-07-net-ethernet-mtk_eth_soc-drop-descriptor-cpu-own-bit.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.4/770-07-net-ethernet-mtk_eth_soc-drop-descriptor-cpu-own-bit.patch b/target/linux/generic/pending-5.4/770-07-net-ethernet-mtk_eth_soc-drop-descriptor-cpu-own-bit.patch new file mode 100644 index 0000000000..0a9dfd68a1 --- /dev/null +++ b/target/linux/generic/pending-5.4/770-07-net-ethernet-mtk_eth_soc-drop-descriptor-cpu-own-bit.patch @@ -0,0 +1,34 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Wed, 26 Aug 2020 17:48:14 +0200 +Subject: [PATCH] net: ethernet: mtk_eth_soc: drop descriptor cpu-own bit check + in qdma tx cleanup + +mtk_poll_tx_qdma already checks the MTK_QTX_DRX_PTR register, which points +at the last completed descriptor. +To slightly improve performance, also remove the register bit which forces +the hardware to write back this bit earlier. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -1368,9 +1368,6 @@ static int mtk_poll_tx_qdma(struct mtk_e + int mac = 0; + + desc = mtk_qdma_phys_to_virt(ring, desc->txd2); +- if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0) +- break; +- + tx_buf = mtk_desc_to_tx_buf(ring, desc); + if (tx_buf->flags & MTK_TX_FLAGS_FPORT1) + mac = 1; +@@ -2203,7 +2200,7 @@ static int mtk_start_dma(struct mtk_eth + + if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { + mtk_w32(eth, +- MTK_TX_WB_DDONE | MTK_TX_DMA_EN | ++ MTK_TX_DMA_EN | + MTK_TX_BT_32DWORDS | MTK_NDP_CO_PRO | + MTK_RX_DMA_EN | MTK_RX_2B_OFFSET | + MTK_RX_BT_32DWORDS, |