[PATCH] dt-bindings: Drop kernel copy of common reserved-memory bindings
From: Rob Herring
Date: Fri Oct 13 2023 - 16:45:06 EST
The common reserved-memory bindings have recently been copied from the
kernel tree into dtschema. The preference is to host common, stable
bindings in dtschema. As reserved-memory is documented in the DT Spec,
it meets the criteria.
The v2023.09 version of dtschema is what contains the reserved-memory
schemas we depend on, so bump the minimum version to that. Otherwise,
references to these schemas will generate errors.
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
---
Documentation/devicetree/bindings/Makefile | 2 +-
.../remoteproc/renesas,rcar-rproc.yaml | 2 +-
.../bindings/reserved-memory/framebuffer.yaml | 52 -----
.../reserved-memory/memory-region.yaml | 40 ----
.../reserved-memory/reserved-memory.txt | 2 +-
.../reserved-memory/reserved-memory.yaml | 181 ------------------
.../reserved-memory/shared-dma-pool.yaml | 97 ----------
.../bindings/sound/mediatek,mt8188-afe.yaml | 2 +-
8 files changed, 4 insertions(+), 374 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml
delete mode 100644 Documentation/devicetree/bindings/reserved-memory/memory-region.yaml
delete mode 100644 Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml
delete mode 100644 Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml
diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
index 8b395893bd85..3e886194b043 100644
--- a/Documentation/devicetree/bindings/Makefile
+++ b/Documentation/devicetree/bindings/Makefile
@@ -6,7 +6,7 @@ DT_MK_SCHEMA ?= dt-mk-schema
DT_SCHEMA_LINT = $(shell which yamllint || \
echo "warning: python package 'yamllint' not installed, skipping" >&2)
-DT_SCHEMA_MIN_VERSION = 2022.3
+DT_SCHEMA_MIN_VERSION = 2023.9
PHONY += check_dtschema_version
check_dtschema_version:
diff --git a/Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml
index 4bea679a0f61..5c280117dc93 100644
--- a/Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/renesas,rcar-rproc.yaml
@@ -31,7 +31,7 @@ properties:
remoteproc device. This is variable and describes the memories shared with
the remote processor (e.g. remoteproc firmware and carveouts, rpmsg
vrings, ...).
- (see ../reserved-memory/reserved-memory.yaml)
+ (see reserved-memory/reserved-memory.yaml in dtschema project)
required:
- compatible
diff --git a/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml b/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml
deleted file mode 100644
index 851ec24d6142..000000000000
--- a/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml
+++ /dev/null
@@ -1,52 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/reserved-memory/framebuffer.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: /reserved-memory framebuffer node
-
-maintainers:
- - devicetree-spec@xxxxxxxxxxxxxxx
-
-allOf:
- - $ref: reserved-memory.yaml
-
-properties:
- compatible:
- const: framebuffer
- description: >
- This indicates a region of memory meant to be used as a framebuffer for
- a set of display devices. It can be used by an operating system to keep
- the framebuffer from being overwritten and use it as the backing memory
- for a display device (such as simple-framebuffer).
-
-unevaluatedProperties: false
-
-examples:
- - |
- / {
- compatible = "foo";
- model = "foo";
- #address-cells = <1>;
- #size-cells = <1>;
-
- chosen {
- framebuffer {
- compatible = "simple-framebuffer";
- memory-region = <&fb>;
- };
- };
-
- reserved-memory {
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
-
- fb: framebuffer@80000000 {
- compatible = "framebuffer";
- reg = <0x80000000 0x007e9000>;
- };
- };
- };
-...
diff --git a/Documentation/devicetree/bindings/reserved-memory/memory-region.yaml b/Documentation/devicetree/bindings/reserved-memory/memory-region.yaml
deleted file mode 100644
index 592f180e6b0d..000000000000
--- a/Documentation/devicetree/bindings/reserved-memory/memory-region.yaml
+++ /dev/null
@@ -1,40 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/reserved-memory/memory-region.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Reserved Memory Region
-
-maintainers:
- - devicetree-spec@xxxxxxxxxxxxxxx
-
-description: |
- Regions in the /reserved-memory node may be referenced by other device
- nodes by adding a memory-region property to the device node.
-
-select: true
-
-properties:
- memory-region:
- $ref: /schemas/types.yaml#/definitions/phandle-array
- description: >
- Phandle to a /reserved-memory child node assigned to the device.
-
- memory-region-names:
- $ref: /schemas/types.yaml#/definitions/string-array
- description: >
- A list of names, one for each corresponding entry in the
- memory-region property
-
-additionalProperties: true
-
-examples:
- - |
- fb0: video@12300000 {
- /* ... */
- reg = <0x12300000 0x1000>;
- memory-region = <&display_reserved>;
- };
-
-...
diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
index 1810701a8509..8ce72996d500 100644
--- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
@@ -1 +1 @@
-This file has been moved to reserved-memory.yaml.
+This file has been moved to reserved-memory.yaml in the dtschema repository.
diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml
deleted file mode 100644
index c680e397cfd2..000000000000
--- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml
+++ /dev/null
@@ -1,181 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/reserved-memory/reserved-memory.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: /reserved-memory Child Node Common
-
-maintainers:
- - devicetree-spec@xxxxxxxxxxxxxxx
-
-description: >
- Reserved memory is specified as a node under the /reserved-memory node. The
- operating system shall exclude reserved memory from normal usage one can
- create child nodes describing particular reserved (excluded from normal use)
- memory regions. Such memory regions are usually designed for the special
- usage by various device drivers.
-
- Each child of the reserved-memory node specifies one or more regions
- of reserved memory. Each child node may either use a 'reg' property to
- specify a specific range of reserved memory, or a 'size' property with
- optional constraints to request a dynamically allocated block of
- memory.
-
- Following the generic-names recommended practice, node names should
- reflect the purpose of the node (ie. "framebuffer" or "dma-pool").
- Unit address (@<address>) should be appended to the name if the node
- is a static allocation.
-
-properties:
- reg: true
-
- size:
- oneOf:
- - $ref: /schemas/types.yaml#/definitions/uint32
- - $ref: /schemas/types.yaml#/definitions/uint64
- description: >
- Length based on parent's \#size-cells. Size in bytes of memory to
- reserve.
-
- alignment:
- oneOf:
- - $ref: /schemas/types.yaml#/definitions/uint32
- - $ref: /schemas/types.yaml#/definitions/uint64
- description: >
- Length based on parent's \#size-cells. Address boundary for
- alignment of allocation.
-
- alloc-ranges:
- $ref: /schemas/types.yaml#/definitions/uint32-array
- description: >
- Address and Length pairs. Specifies regions of memory that are
- acceptable to allocate from.
-
- iommu-addresses:
- $ref: /schemas/types.yaml#/definitions/phandle-array
- description: >
- A list of phandle and specifier pairs that describe static IO virtual
- address space mappings and carveouts associated with a given reserved
- memory region. The phandle in the first cell refers to the device for
- which the mapping or carveout is to be created.
-
- The specifier consists of an address/size pair and denotes the IO
- virtual address range of the region for the given device. The exact
- format depends on the values of the "#address-cells" and "#size-cells"
- properties of the device referenced via the phandle.
-
- When used in combination with a "reg" property, an IOVA mapping is to
- be established for this memory region. One example where this can be
- useful is to create an identity mapping for physical memory that the
- firmware has configured some hardware to access (such as a bootsplash
- framebuffer).
-
- If no "reg" property is specified, the "iommu-addresses" property
- defines carveout regions in the IOVA space for the given device. This
- can be useful if a certain memory region should not be mapped through
- the IOMMU.
-
- no-map:
- type: boolean
- description: >
- Indicates the operating system must not create a virtual mapping
- of the region as part of its standard mapping of system memory,
- nor permit speculative access to it under any circumstances other
- than under the control of the device driver using the region.
-
- reusable:
- type: boolean
- description: >
- The operating system can use the memory in this region with the
- limitation that the device driver(s) owning the region need to be
- able to reclaim it back. Typically that means that the operating
- system can use that region to store volatile or cached data that
- can be otherwise regenerated or migrated elsewhere.
-
-allOf:
- - if:
- required:
- - no-map
-
- then:
- not:
- required:
- - reusable
-
- - if:
- required:
- - reusable
-
- then:
- not:
- required:
- - no-map
-
-oneOf:
- - oneOf:
- - required:
- - reg
-
- - required:
- - size
-
- - oneOf:
- # IOMMU reservations
- - required:
- - iommu-addresses
-
- # IOMMU mappings
- - required:
- - reg
- - iommu-addresses
-
-additionalProperties: true
-
-examples:
- - |
- / {
- compatible = "foo";
- model = "foo";
-
- #address-cells = <2>;
- #size-cells = <2>;
-
- reserved-memory {
- #address-cells = <2>;
- #size-cells = <2>;
- ranges;
-
- adsp_resv: reservation-adsp {
- /*
- * Restrict IOVA mappings for ADSP buffers to the 512 MiB region
- * from 0x40000000 - 0x5fffffff. Anything outside is reserved by
- * the ADSP for I/O memory and private memory allocations.
- */
- iommu-addresses = <&adsp 0x0 0x00000000 0x00 0x40000000>,
- <&adsp 0x0 0x60000000 0xff 0xa0000000>;
- };
-
- fb: framebuffer@90000000 {
- reg = <0x0 0x90000000 0x0 0x00800000>;
- iommu-addresses = <&dc0 0x0 0x90000000 0x0 0x00800000>;
- };
- };
-
- bus@0 {
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x0 0x0 0x40000000>;
-
- adsp: adsp@2990000 {
- reg = <0x2990000 0x2000>;
- memory-region = <&adsp_resv>;
- };
-
- dc0: display@15200000 {
- reg = <0x15200000 0x10000>;
- memory-region = <&fb>;
- };
- };
- };
-...
diff --git a/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml b/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml
deleted file mode 100644
index 457de0920cd1..000000000000
--- a/Documentation/devicetree/bindings/reserved-memory/shared-dma-pool.yaml
+++ /dev/null
@@ -1,97 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/reserved-memory/shared-dma-pool.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: /reserved-memory DMA pool
-
-maintainers:
- - devicetree-spec@xxxxxxxxxxxxxxx
-
-allOf:
- - $ref: reserved-memory.yaml
-
-properties:
- compatible:
- oneOf:
- - const: shared-dma-pool
- description: >
- This indicates a region of memory meant to be used as a shared
- pool of DMA buffers for a set of devices. It can be used by an
- operating system to instantiate the necessary pool management
- subsystem if necessary.
-
- - const: restricted-dma-pool
- description: >
- This indicates a region of memory meant to be used as a pool
- of restricted DMA buffers for a set of devices. The memory
- region would be the only region accessible to those devices.
- When using this, the no-map and reusable properties must not
- be set, so the operating system can create a virtual mapping
- that will be used for synchronization. The main purpose for
- restricted DMA is to mitigate the lack of DMA access control
- on systems without an IOMMU, which could result in the DMA
- accessing the system memory at unexpected times and/or
- unexpected addresses, possibly leading to data leakage or
- corruption. The feature on its own provides a basic level of
- protection against the DMA overwriting buffer contents at
- unexpected times. However, to protect against general data
- leakage and system memory corruption, the system needs to
- provide way to lock down the memory access, e.g., MPU. Note
- that since coherent allocation needs remapping, one must set
- up another device coherent pool by shared-dma-pool and use
- dma_alloc_from_dev_coherent instead for atomic coherent
- allocation.
-
- linux,cma-default:
- type: boolean
- description: >
- If this property is present, then Linux will use the region for
- the default pool of the contiguous memory allocator.
-
- linux,dma-default:
- type: boolean
- description: >
- If this property is present, then Linux will use the region for
- the default pool of the consistent DMA allocator.
-
-if:
- properties:
- compatible:
- contains:
- const: restricted-dma-pool
-then:
- properties:
- no-map: false
- reusable: false
-
-unevaluatedProperties: false
-
-examples:
- - |
- reserved-memory {
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
-
- /* global autoconfigured region for contiguous allocations */
- linux,cma {
- compatible = "shared-dma-pool";
- reusable;
- size = <0x4000000>;
- alignment = <0x2000>;
- linux,cma-default;
- };
-
- display_reserved: framebuffer@78000000 {
- reg = <0x78000000 0x800000>;
- };
-
- restricted_dma_reserved: restricted-dma-pool@50000000 {
- compatible = "restricted-dma-pool";
- reg = <0x50000000 0x4000000>;
- };
- };
-
-...
diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
index 90520f89208b..77af276ed2a2 100644
--- a/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
+++ b/Documentation/devicetree/bindings/sound/mediatek,mt8188-afe.yaml
@@ -29,7 +29,7 @@ properties:
maxItems: 1
description: |
Shared memory region for AFE memif. A "shared-dma-pool".
- See ../reserved-memory/reserved-memory.yaml for details.
+ See dtschema reserved-memory/shared-dma-pool.yaml for details.
mediatek,topckgen:
$ref: /schemas/types.yaml#/definitions/phandle
--
2.42.0