diff options
| author | Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com> | 2021-04-22 22:21:08 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-23 13:31:58 -0700 |
| commit | 3bc8e0aff23be0526af0dbc7973a8866a08d73f1 (patch) | |
| tree | 35ee08136d077d6a8dad553652f3f2e1355f2131 /drivers | |
| parent | fa817272c37ef78e25dc14e4760ac78a7043a18a (diff) | |
| download | linux-3bc8e0aff23be0526af0dbc7973a8866a08d73f1.tar.gz | |
net: ethernet: mtk_eth_soc: use iopoll.h macro for DMA init
Replace a tight busy-wait loop without a pause with a standard readx_poll_timeout_atomic routine with a 5 us poll period. Tested by booting a MT7621 device to ensure the driver initializes properly. Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.c | 29 | ||||
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_eth_soc.h | 2 |
2 files changed, 14 insertions, 17 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 37e50a2e7d0e..ed4eacef17ce 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -2033,25 +2033,22 @@ static int mtk_set_features(struct net_device *dev, netdev_features_t features) /* wait for DMA to finish whatever it is doing before we start using it again */ static int mtk_dma_busy_wait(struct mtk_eth *eth) { - unsigned long t_start = jiffies; + unsigned int reg; + int ret; + u32 val; - while (1) { - if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) { - if (!(mtk_r32(eth, MTK_QDMA_GLO_CFG) & - (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) - return 0; - } else { - if (!(mtk_r32(eth, MTK_PDMA_GLO_CFG) & - (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY))) - return 0; - } + if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) + reg = MTK_QDMA_GLO_CFG; + else + reg = MTK_PDMA_GLO_CFG; - if (time_after(jiffies, t_start + MTK_DMA_BUSY_TIMEOUT)) - break; - } + ret = readx_poll_timeout_atomic(__raw_readl, eth->base + reg, val, + !(val & (MTK_RX_DMA_BUSY | MTK_TX_DMA_BUSY)), + 5, MTK_DMA_BUSY_TIMEOUT_US); + if (ret) + dev_err(eth->dev, "DMA init timeout\n"); - dev_err(eth->dev, "DMA init timeout\n"); - return -1; + return ret; } static int mtk_dma_init(struct mtk_eth *eth) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 6b92dd6c2cda..11331b44ba07 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -214,7 +214,7 @@ #define MTK_TX_DMA_BUSY BIT(1) #define MTK_RX_DMA_EN BIT(2) #define MTK_TX_DMA_EN BIT(0) -#define MTK_DMA_BUSY_TIMEOUT HZ +#define MTK_DMA_BUSY_TIMEOUT_US 1000000 /* QDMA Reset Index Register */ #define MTK_QDMA_RST_IDX 0x1A08 |