1 From: Felix Fietkau <nbd@nbd.name>
2 Date: Wed, 26 Aug 2020 17:48:14 +0200
3 Subject: [PATCH] net: ethernet: mtk_eth_soc: drop descriptor cpu-own bit check
6 mtk_poll_tx_qdma already checks the MTK_QTX_DRX_PTR register, which points
7 at the last completed descriptor.
8 To slightly improve performance, also remove the register bit which forces
9 the hardware to write back this bit earlier.
11 Signed-off-by: Felix Fietkau <nbd@nbd.name>
14 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
15 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
16 @@ -1368,9 +1368,6 @@ static int mtk_poll_tx_qdma(struct mtk_e
19 desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
20 - if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0)
23 tx_buf = mtk_desc_to_tx_buf(ring, desc);
24 if (tx_buf->flags & MTK_TX_FLAGS_FPORT1)
26 @@ -2203,7 +2200,7 @@ static int mtk_start_dma(struct mtk_eth
28 if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
30 - MTK_TX_WB_DDONE | MTK_TX_DMA_EN |
32 MTK_TX_BT_32DWORDS | MTK_NDP_CO_PRO |
33 MTK_RX_DMA_EN | MTK_RX_2B_OFFSET |