niansa-misc/linux
1
0
Fork 0
mirror of synced 2025-03-06 20:59:54 +01:00
Code Issues Projects Releases Packages Wiki Activity

net: stmmac: dwmac-loongson: Add fix_soc_reset() callback

Browse source 
Loongson's DWMAC device may take nearly two seconds to complete DMA reset,
however, the default waiting time for reset is 200 milliseconds.
Therefore, the following error message may appear:

[14.427169] dwmac-loongson-pci 0000:00:03.2: Failed to reset the dma

Fixes: 803fc61df2 ("net: stmmac: dwmac-loongson: Add Loongson Multi-channels GMAC support")
Cc: stable@vger.kernel.org
Signed-off-by: Qunqin Zhao <zhaoqunqin@loongson.cn>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Yanteng Si <si.yanteng@linux.dev>
Link: https://patch.msgid.link/20250219020701.15139-1-zhaoqunqin@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Qunqin Zhao 2025-02-19 10:07:01 +08:00 • committed by Jakub Kicinski
parent 992ee3ed6e
commit f06e4bfd01
1 changed files with 14 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
View file

@ -516,6 +516,19 @@ static int loongson_dwmac_acpi_config(struct pci_dev *pdev,
return 0;
}
/* Loongson's DWMAC device may take nearly two seconds to complete DMA reset */
static int loongson_dwmac_fix_reset(void *priv, void __iomem *ioaddr)
{
u32 value = readl(ioaddr + DMA_BUS_MODE);
value |= DMA_BUS_MODE_SFT_RESET;
writel(value, ioaddr + DMA_BUS_MODE);
return readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
!(value & DMA_BUS_MODE_SFT_RESET),
10000, 2000000);
}
static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct plat_stmmacenet_data *plat;
@ -566,6 +579,7 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
plat->bsp_priv = ld;
plat->setup = loongson_dwmac_setup;
plat->fix_soc_reset = loongson_dwmac_fix_reset;
ld->dev = &pdev->dev;
ld->loongson_id = readl(res.addr + GMAC_VERSION) & 0xff;