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

Leo Li
2017-09-21T18:36:54Z

> -----Original Message-----
> From: Roy Pledge [mailto:roy.pledge@nxp.com]
> Sent: Monday, September 18, 2017 3:40 PM
> To: Leo Li <leoyang.li@nxp.com>; linuxppc-dev@lists.ozlabs.org; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> devicetree@vger.kernel.org
> Cc: oss@buserror.net; Madalin-cristian Bucur <madalin.bucur@nxp.com>;
> catalin.marinas@arm.com; linux@armlinux.org.uk; arnd@arndb.de;
> mark.rutland@arm.com; Roy Pledge <roy.pledge@nxp.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@nxp.com>

Hi Rob and Mark,

Would you help to review this binding patch and ACK if it is ok?

Regards,
Leo

> ---
> 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