From 9feb667d8674f7f85f5ab6c8d88788a0fbef8d7d Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Wed, 16 Jan 2019 20:29:40 -0800 Subject: [PATCH] arm64: dts: qcom: sdm845: Extend ranges and describe DMA space For devices attached to an IOMMU, translation between IOVA and physical addresses is no longer 1:1 and dma-ranges should be specified to describe the available IOVA address space. On SDM845 the busses are implemented with 36 address bits, so dma-ranges must be defined to reduce the size of the IOVA address space from the 48 bits supported by the SMMU. Without this DMA allocations may end up with IOVAs outside the valid range, that gets truncated by the bus between the device and its translation unit. Also extend ranges to describe the available address space. Tested-by: Douglas Anderson Reviewed-by: Douglas Anderson Reviewed-by: Stephen Boyd Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross --- arch/arm64/boot/dts/qcom/sdm845.dtsi | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi index e8daa73e1551..e4156ea320aa 100644 --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi @@ -354,7 +354,8 @@ soc: soc { #address-cells = <2>; #size-cells = <2>; - ranges = <0 0 0 0 0 0xffffffff>; + ranges = <0 0 0 0 0x10 0>; + dma-ranges = <0 0 0 0 0x10 0>; compatible = "simple-bus"; gcc: clock-controller@100000 { -- 2.11.0