linux-kernel - [PATCH 5/6] ARM: dts: keystone-k2l-evm: Add and enable common DSP CMA memory pool

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Message-ID: <20170728231918.16778-6-s-anna@ti.com>
Date:   Fri, 28 Jul 2017 18:19:17 -0500
From:   Suman Anna <s-anna@...com>
To:     Santosh Shilimkar <ssantosh@...nel.org>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Suman Anna <s-anna@...com>,
        Sam Nelson <sam.nelson@...com>, "Andrew F. Davis" <afd@...com>
Subject: [PATCH 5/6] ARM: dts: keystone-k2l-evm: Add and enable common DSP CMA memory pool

From: Sam Nelson <sam.nelson@...com>

A common CMA memory pool reserved memory node is added, and is attached
to all the DSP nodes through the 'memory-region' property on the 66AK2L
EVM board. This area will be used for allocating virtio rings and buffers.
The common node allows the DSP Memory Protection and Address Extension
(MPAX) module to be configured uniformly across all the DSP processors.

The reserved memory node and all the user DSP nodes are also marked okay
to enable the DSPs on the 66AK2L EVM board.

Signed-off-by: Sam Nelson <sam.nelson@...com>
Signed-off-by: Suman Anna <s-anna@...com>
---
 arch/arm/boot/dts/keystone-k2l-evm.dts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/keystone-k2l-evm.dts b/arch/arm/boot/dts/keystone-k2l-evm.dts
index 056b42f99d7a..528667618db4 100644
--- a/arch/arm/boot/dts/keystone-k2l-evm.dts
+++ b/arch/arm/boot/dts/keystone-k2l-evm.dts
@@ -16,6 +16,19 @@
 	compatible = "ti,k2l-evm", "ti,k2l", "ti,keystone";
 	model = "Texas Instruments Keystone 2 Lamarr EVM";
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		dsp_common_memory: dsp-common-memory@...800000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00000008 0x1f800000 0x00000000 0x800000>;
+			reusable;
+			status = "okay";
+		};
+	};
+
 	soc {
 		clocks {
 			refclksys: refclksys {
@@ -133,3 +146,23 @@
 		reg = <1>;
 	};
 };
+
+&dsp0 {
+	memory-region = <&dsp_common_memory>;
+	status = "okay";
+};
+
+&dsp1 {
+	memory-region = <&dsp_common_memory>;
+	status = "okay";
+};
+
+&dsp2 {
+	memory-region = <&dsp_common_memory>;
+	status = "okay";
+};
+
+&dsp3 {
+	memory-region = <&dsp_common_memory>;
+	status = "okay";
+};
-- 
2.13.1