linux-kernel - [v5 04/12] dt-bindings: soc/fsl: Update reserved memory binding for QBMan

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Message-ID: <1505767187-4596-5-git-send-email-roy.pledge@nxp.com>
Date:   Mon, 18 Sep 2017 16:39:39 -0400
From:   Roy Pledge <roy.pledge@....com>
To:     <leoyang.li@....com>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC:     <oss@...error.net>, <madalin.bucur@....com>,
        <catalin.marinas@....com>, <linux@...linux.org.uk>,
        <arnd@...db.de>, <mark.rutland@....com>,
        Roy Pledge <roy.pledge@....com>
Subject: [v5 04/12] dt-bindings: soc/fsl: Update reserved memory binding for QBMan

Updates the QMan and BMan device tree bindings for reserved memory
nodes. This makes the reserved memory allocation compatible with
the shared-dma-pool usage.

Signed-off-by: Roy Pledge <roy.pledge@....com>
---
 Documentation/devicetree/bindings/soc/fsl/bman.txt | 12 +++++-----
 Documentation/devicetree/bindings/soc/fsl/qman.txt | 26 ++++++++++++++++------
 2 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/fsl/bman.txt b/Documentation/devicetree/bindings/soc/fsl/bman.txt
index 47ac834..48eed14 100644
--- a/Documentation/devicetree/bindings/soc/fsl/bman.txt
+++ b/Documentation/devicetree/bindings/soc/fsl/bman.txt
@@ -65,8 +65,8 @@ to the respective BMan instance
 BMan Private Memory Node
 
 BMan requires a contiguous range of physical memory used for the backing store
-for BMan Free Buffer Proxy Records (FBPR). This memory is reserved/allocated as a
-node under the /reserved-memory node
+for BMan Free Buffer Proxy Records (FBPR). This memory is reserved/allocated as
+a node under the /reserved-memory node.
 
 The BMan FBPR memory node must be named "bman-fbpr"
 
@@ -75,7 +75,9 @@ PROPERTIES
 - compatible
 	Usage:		required
 	Value type:	<stringlist>
-	Definition:	Must inclide "fsl,bman-fbpr"
+	Definition:	PPC platforms: Must include "fsl,bman-fbpr"
+			ARM platforms: Must include "shared-dma-pool"
+				       as well as the "no-map" property
 
 The following constraints are relevant to the FBPR private memory:
 	- The size must be 2^(size + 1), with size = 11..33. That is 4 KiB to
@@ -100,10 +102,10 @@ The example below shows a BMan FBPR dynamic allocation memory node
 		ranges;
 
 		bman_fbpr: bman-fbpr {
-			compatible = "fsl,bman-fbpr";
-			alloc-ranges = <0 0 0x10 0>;
+			compatible = "shared-mem-pool";
 			size = <0 0x1000000>;
 			alignment = <0 0x1000000>;
+			no-map;
 		};
 	};
 
diff --git a/Documentation/devicetree/bindings/soc/fsl/qman.txt b/Documentation/devicetree/bindings/soc/fsl/qman.txt
index 556ebb8..ee96afd 100644
--- a/Documentation/devicetree/bindings/soc/fsl/qman.txt
+++ b/Documentation/devicetree/bindings/soc/fsl/qman.txt
@@ -60,6 +60,12 @@ are located at offsets 0xbf8 and 0xbfc
 	Value type:	<prop-encoded-array>
 	Definition:	Reference input clock. Its frequency is half of the
 			platform clock
+- memory-regions
+	Usage:		Required for ARM
+	Value type:	<phandle array>
+	Definition:	List of phandles referencing the QMan private memory
+			nodes (described below). The qman-fqd node must be
+			first followed by qman-pfdr node. Only used on ARM
 
 Devices connected to a QMan instance via Direct Connect Portals (DCP) must link
 to the respective QMan instance
@@ -74,7 +80,9 @@ QMan Private Memory Nodes
 
 QMan requires two contiguous range of physical memory used for the backing store
 for QMan Frame Queue Descriptor (FQD) and Packed Frame Descriptor Record (PFDR).
-This memory is reserved/allocated as a nodes under the /reserved-memory node
+This memory is reserved/allocated as a node under the /reserved-memory node.
+
+For additional details about reserved memory regions see reserved-memory.txt
 
 The QMan FQD memory node must be named "qman-fqd"
 
@@ -83,7 +91,9 @@ PROPERTIES
 - compatible
 	Usage:		required
 	Value type:	<stringlist>
-	Definition:	Must inclide "fsl,qman-fqd"
+	Definition:	PPC platforms: Must include "fsl,qman-fqd"
+			ARM platforms: Must include "shared-dma-pool"
+				       as well as the "no-map" property
 
 The QMan PFDR memory node must be named "qman-pfdr"
 
@@ -92,7 +102,9 @@ PROPERTIES
 - compatible
 	Usage:		required
 	Value type:	<stringlist>
-	Definition:	Must inclide "fsl,qman-pfdr"
+	Definition:	PPC platforms: Must include "fsl,qman-pfdr"
+			ARM platforms: Must include "shared-dma-pool"
+				       as well as the "no-map" property
 
 The following constraints are relevant to the FQD and PFDR private memory:
 	- The size must be 2^(size + 1), with size = 11..29. That is 4 KiB to
@@ -117,16 +129,16 @@ The example below shows a QMan FQD and a PFDR dynamic allocation memory nodes
 		ranges;
 
 		qman_fqd: qman-fqd {
-			compatible = "fsl,qman-fqd";
-			alloc-ranges = <0 0 0x10 0>;
+			compatible = "shared-dma-pool";
 			size = <0 0x400000>;
 			alignment = <0 0x400000>;
+			no-map;
 		};
 		qman_pfdr: qman-pfdr {
-			compatible = "fsl,qman-pfdr";
-			alloc-ranges = <0 0 0x10 0>;
+			compatible = "shared-dma-pool";
 			size = <0 0x2000000>;
 			alignment = <0 0x2000000>;
+			no-map;
 		};
 	};
 
-- 
2.7.4