| Message ID | 20230927122928.22033-2-ansuelsmth@gmail.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net-next,1/2] dt-bindings: net: snps,dwmac: DMA Arbitration scheme | expand |
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c index daf79cdbd3ec..14eb7e8d61ea 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c @@ -104,6 +104,9 @@ static void dwmac1000_dma_init(void __iomem *ioaddr, if (dma_cfg->aal) value |= DMA_BUS_MODE_AAL; + if (dma_cfg->arbit) + value |= DMA_BUS_MODE_DA; + writel(value, ioaddr + DMA_BUS_MODE); /* Mask interrupts by writing to CSR7 */ diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 843bd8804bfa..f5791b03b320 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -576,6 +576,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8"); dma_cfg->aal = of_property_read_bool(np, "snps,aal"); + dma_cfg->arbit = of_property_read_bool(np, "snps,arbit"); dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst"); diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index c0079a7574ae..04a61f1eba90 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -97,6 +97,7 @@ struct stmmac_dma_cfg { int fixed_burst; int mixed_burst; bool aal; + bool arbit; bool eame; bool multi_msi_en; bool dche;
Add support for DMA Arbitration Scheme tune up to program the DMA to put priority on Rx instead of applying Round-Robin logic. This special DMA bus mode was defined in the header from a long time but was never actually implemented. This option is used on the original setup on the ipq806x-gmac driver based on DWMAC1000. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> --- drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c | 3 +++ drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 1 + include/linux/stmmac.h | 1 + 3 files changed, 5 insertions(+)