diff options
| -rw-r--r-- | Documentation/devicetree/bindings/net/stmmac.txt | 2 | ||||
| -rw-r--r-- | Documentation/networking/stmmac.txt | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 1 | ||||
| -rw-r--r-- | include/linux/stmmac.h | 1 |
7 files changed, 14 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt index 8080038ff1b2..128da752fec9 100644 --- a/Documentation/devicetree/bindings/net/stmmac.txt +++ b/Documentation/devicetree/bindings/net/stmmac.txt @@ -39,6 +39,8 @@ Optional properties: If set, DMA tx will use this value rather than snps,pbl. - snps,rxpbl Rx Programmable Burst Length. Only for GMAC and newer. If set, DMA rx will use this value rather than snps,pbl. +- snps,no-pbl-x8 Don't multiply the pbl/txpbl/rxpbl values by 8. + For core rev < 3.50, don't multiply the values by 4. - snps,aal Address-Aligned Beats - snps,fixed-burst Program the DMA to use the fixed burst mode - snps,mixed-burst Program the DMA to use the mixed burst mode diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index 6add57374f70..2bb07078f535 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -152,8 +152,9 @@ Where: o dma_cfg: internal DMA parameters o pbl: the Programmable Burst Length is maximum number of beats to be transferred in one DMA transaction. - GMAC also enables the 4xPBL by default. + GMAC also enables the 4xPBL by default. (8xPBL for GMAC 3.50 and newer) o txpbl/rxpbl: GMAC and newer supports independent DMA pbl for tx/rx. + o pblx8: Enable 8xPBL (4xPBL for core rev < 3.50). Enabled by default. o fixed_burst/mixed_burst/aal o clk_csr: fixed CSR Clock range selection. o has_gmac: uses the GMAC core. @@ -208,6 +209,7 @@ struct stmmac_dma_cfg { int pbl; int txpbl; int rxpbl; + bool pblx8; int fixed_burst; int mixed_burst; bool aal; @@ -219,6 +221,7 @@ Where: If set, DMA tx will use this value rather than pbl. o rxpbl: Receive Programmable Burst Length. Only for GMAC and newer. If set, DMA rx will use this value rather than pbl. + o pblx8: Enable 8xPBL (4xPBL for core rev < 3.50). Enabled by default. o fixed_burst: program the DMA to use the fixed burst mode o mixed_burst: program the DMA to use the mixed burst mode o aal: Address-Aligned Beats diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c index 99b8040af592..612d3aaac9a4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c @@ -98,7 +98,8 @@ static void dwmac1000_dma_init(void __iomem *ioaddr, * Note: before stmmac core 3.50 this mode bit was 4xPBL, and * post 3.5 mode bit acts as 8*PBL. */ - value |= DMA_BUS_MODE_MAXPBL; + if (dma_cfg->pblx8) + value |= DMA_BUS_MODE_MAXPBL; value |= DMA_BUS_MODE_USP; value &= ~(DMA_BUS_MODE_PBL_MASK | DMA_BUS_MODE_RPBL_MASK); value |= (txpbl << DMA_BUS_MODE_PBL_SHIFT); diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c index 2c3b2098f350..8196ab5fc33c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c @@ -84,7 +84,8 @@ static void dwmac4_dma_init_channel(void __iomem *ioaddr, * on each channel */ value = readl(ioaddr + DMA_CHAN_CONTROL(channel)); - value = value | DMA_BUS_MODE_PBL; + if (dma_cfg->pblx8) + value = value | DMA_BUS_MODE_PBL; writel(value, ioaddr + DMA_CHAN_CONTROL(channel)); value = readl(ioaddr + DMA_CHAN_TX_CONTROL(channel)); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c index 56c8a2342c14..a2831773431a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c @@ -81,6 +81,7 @@ static void stmmac_default_data(struct plat_stmmacenet_data *plat) plat->mdio_bus_data->phy_mask = 0; plat->dma_cfg->pbl = 32; + plat->dma_cfg->pblx8 = true; /* TODO: AXI */ /* Set default value for multicast hash bins */ @@ -115,6 +116,7 @@ static int quark_default_data(struct plat_stmmacenet_data *plat, plat->mdio_bus_data->phy_mask = 0; plat->dma_cfg->pbl = 16; + plat->dma_cfg->pblx8 = true; plat->dma_cfg->fixed_burst = 1; /* AXI (TODO) */ diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 96afe0561c99..082cd48db6a7 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -317,6 +317,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) dma_cfg->pbl = DEFAULT_DMA_PBL; of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl); of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl); + dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8"); dma_cfg->aal = of_property_read_bool(np, "snps,aal"); dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index e6d7a5940819..266dab9ad782 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -90,6 +90,7 @@ struct stmmac_dma_cfg { int pbl; int txpbl; int rxpbl; + bool pblx8; int fixed_burst; int mixed_burst; bool aal; |