Hi Jon, On 21/03/17 20:51, Jon Mason wrote: > Cache related issues with DMA rings and performance issues related to > caching are being caused by not properly setting the "dma-coherent" flag > in the device tree entries. Adding it here to correct the issue.
I'd expect the SMMU to be wired up coherently as well - is it not? (it won't actually be going wrong if it is, just that you'd be doing unnecessary cache cleaning on page table updates) Robin. > Signed-off-by: Jon Mason <[email protected]> > Fixes: fd5e5dd56 ("arm64: dts: Add PCIe0 and PCIe4 DT nodes for NS2") > Fixes: dddc3c9d7 ("arm64: dts: NS2: add AMAC ethernet support") > Fixes: e79249143 ("arm64: dts: Add Broadcom Northstar2 device tree entries > for PDC driver") > Fixes: ac9aae00f ("arm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2") > Fixes: efc877676 ("arm64: dts: Add SDHCI DT node for NS2") > --- > arch/arm64/boot/dts/broadcom/ns2.dtsi | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/arch/arm64/boot/dts/broadcom/ns2.dtsi > b/arch/arm64/boot/dts/broadcom/ns2.dtsi > index b8503fc..35a309a 100644 > --- a/arch/arm64/boot/dts/broadcom/ns2.dtsi > +++ b/arch/arm64/boot/dts/broadcom/ns2.dtsi > @@ -114,6 +114,7 @@ > pcie0: pcie@20020000 { > compatible = "brcm,iproc-pcie"; > reg = <0 0x20020000 0 0x1000>; > + dma-coherent; > > #interrupt-cells = <1>; > interrupt-map-mask = <0 0 0 0>; > @@ -144,6 +145,7 @@ > pcie4: pcie@50020000 { > compatible = "brcm,iproc-pcie"; > reg = <0 0x50020000 0 0x1000>; > + dma-coherent; > > #interrupt-cells = <1>; > interrupt-map-mask = <0 0 0 0>; > @@ -174,6 +176,7 @@ > pcie8: pcie@60c00000 { > compatible = "brcm,iproc-pcie-paxc"; > reg = <0 0x60c00000 0 0x1000>; > + dma-coherent; > linux,pci-domain = <8>; > > bus-range = <0x0 0x1>; > @@ -203,6 +206,7 @@ > <0x61030000 0x100>; > reg-names = "amac_base", "idm_base", "nicpm_base"; > interrupts = <GIC_SPI 341 IRQ_TYPE_LEVEL_HIGH>; > + dma-coherent; > phy-handle = <&gphy0>; > phy-mode = "rgmii"; > status = "disabled"; > @@ -213,6 +217,7 @@ > reg = <0x612c0000 0x445>; /* PDC FS0 regs */ > interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>; > #mbox-cells = <1>; > + dma-coherent; > brcm,rx-status-len = <32>; > brcm,use-bcm-hdr; > }; > @@ -228,6 +233,7 @@ > reg = <0x612e0000 0x445>; /* PDC FS1 regs */ > interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>; > #mbox-cells = <1>; > + dma-coherent; > brcm,rx-status-len = <32>; > brcm,use-bcm-hdr; > }; > @@ -243,6 +249,7 @@ > reg = <0x61300000 0x445>; /* PDC FS2 regs */ > interrupts = <GIC_SPI 191 IRQ_TYPE_LEVEL_HIGH>; > #mbox-cells = <1>; > + dma-coherent; > brcm,rx-status-len = <32>; > brcm,use-bcm-hdr; > }; > @@ -258,6 +265,7 @@ > reg = <0x61320000 0x445>; /* PDC FS3 regs */ > interrupts = <GIC_SPI 193 IRQ_TYPE_LEVEL_HIGH>; > #mbox-cells = <1>; > + dma-coherent; > brcm,rx-status-len = <32>; > brcm,use-bcm-hdr; > }; > @@ -668,6 +676,7 @@ > sata: ahci@663f2000 { > compatible = "brcm,iproc-ahci", "generic-ahci"; > reg = <0x663f2000 0x1000>; > + dma-coherent; > reg-names = "ahci"; > interrupts = <GIC_SPI 438 IRQ_TYPE_LEVEL_HIGH>; > #address-cells = <1>; > @@ -691,6 +700,7 @@ > compatible = "brcm,sdhci-iproc-cygnus"; > reg = <0x66420000 0x100>; > interrupts = <GIC_SPI 421 IRQ_TYPE_LEVEL_HIGH>; > + dma-coherent; > bus-width = <8>; > clocks = <&genpll_sw BCM_NS2_GENPLL_SW_SDIO_CLK>; > status = "disabled"; > @@ -700,6 +710,7 @@ > compatible = "brcm,sdhci-iproc-cygnus"; > reg = <0x66430000 0x100>; > interrupts = <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>; > + dma-coherent; > bus-width = <8>; > clocks = <&genpll_sw BCM_NS2_GENPLL_SW_SDIO_CLK>; > status = "disabled"; >
