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 <jon.mason@xxxxxxxxxxxx>
> 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";
>
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