ARC: dma [IOC]: mark DMA devices connected as dma-coherent

Mark DMA devices on AXS103 and HSDK boards connected through IOC
port as dma-coherent.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
index dc91c66..d75d65d 100644 (file)
--- a/arch/arc/boot/dts/axc003.dtsi
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -94,6 +94,32 @@
        };
 
        /*
+        * Mark DMA peripherals connected via IOC port as dma-coherent. We do
+        * it via overlay because peripherals defined in axs10x_mb.dtsi are
+        * used for both AXS101 and AXS103 boards and only AXS103 has IOC (so
+        * only AXS103 board has HW-coherent DMA peripherals)
+        * We don't need to mark pgu@17000 as dma-coherent because it uses
+        * external DMA buffer located outside of IOC aperture.
+        */
+       axs10x_mb {
+               ethernet@0x18000 {
+                       dma-coherent;
+               };
+
+               ehci@0x40000 {
+                       dma-coherent;
+               };
+
+               ohci@0x60000 {
+                       dma-coherent;
+               };
+
+               mmc@0x15000 {
+                       dma-coherent;
+               };
+       };
+
+       /*
         * The DW APB ICTL intc on MB is connected to CPU intc via a
         * DT "invisible" DW APB GPIO block, configured to simply pass thru
         * interrupts - setup accordinly in platform init (plat-axs10x/ax10x.c)

diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index 69ff489..a05bb73 100644 (file)
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -101,6 +101,32 @@
        };
 
        /*
+        * Mark DMA peripherals connected via IOC port as dma-coherent. We do
+        * it via overlay because peripherals defined in axs10x_mb.dtsi are
+        * used for both AXS101 and AXS103 boards and only AXS103 has IOC (so
+        * only AXS103 board has HW-coherent DMA peripherals)
+        * We don't need to mark pgu@17000 as dma-coherent because it uses
+        * external DMA buffer located outside of IOC aperture.
+        */
+       axs10x_mb {
+               ethernet@0x18000 {
+                       dma-coherent;
+               };
+
+               ehci@0x40000 {
+                       dma-coherent;
+               };
+
+               ohci@0x60000 {
+                       dma-coherent;
+               };
+
+               mmc@0x15000 {
+                       dma-coherent;
+               };
+       };
+
+       /*
         * This INTC is actually connected to DW APB GPIO
         * which acts as a wire between MB INTC and CPU INTC.
         * GPIO INTC is configured in platform init code

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index d00f283..ef149f5 100644 (file)
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -181,6 +181,7 @@
                        resets = <&cgu_rst HSDK_ETH_RESET>;
                        reset-names = "stmmaceth";
                        mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
+                       dma-coherent;
 
                        mdio {
                                #address-cells = <1>;
@@ -199,12 +200,14 @@
                        compatible = "snps,hsdk-v1.0-ohci", "generic-ohci";
                        reg = <0x60000 0x100>;
                        interrupts = <15>;
+                       dma-coherent;
                };
 
                ehci@40000 {
                        compatible = "snps,hsdk-v1.0-ehci", "generic-ehci";
                        reg = <0x40000 0x100>;
                        interrupts = <15>;
+                       dma-coherent;
                };
 
                mmc@a000 {
@@ -217,6 +220,7 @@
                        clock-names = "biu", "ciu";
                        interrupts = <12>;
                        bus-width = <4>;
+                       dma-coherent;
                };
        };