* [PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes
@ 2016-09-08 2:31 Liu Gang
[not found] ` <1473301904-27259-1-git-send-email-Gang.Liu-3arQi8VN3Tc@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Liu Gang @ 2016-09-08 2:31 UTC (permalink / raw)
To: robh+dt, shawnguo, devicetree, linux-arm-kernel, scott.wood
Cc: minghuan.lian, Liu Gang, mingkai.hu
The 'dma-coherent' indicates that the hardware IP block can ensure
the coherency of the data transferred from/to the IP block. This
can avoid the software cache flush/invalid actions, and improve
the performance significantly.
The PCI IP block of ls2080a has this capability, so adding this
feature to improve the PCI performance.
Signed-off-by: Liu Gang <Gang.Liu@nxp.com>
---
arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
index e3b6034..4eba766 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
@@ -588,6 +588,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x10 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -612,6 +613,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x12 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -636,6 +638,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <8>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x14 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -660,6 +663,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x16 0x00010000 0x0 0x00010000 /* downstream I/O */
--
2.1.0.27.g96db324
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2016-09-08 2:31 [PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes Liu Gang
[not found] ` <1473301904-27259-1-git-send-email-Gang.Liu-3arQi8VN3Tc@public.gmane.org>
2016-09-09 6:05 ` Shawn Guo
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