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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,
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