Convert Qualcomm IOMMU v0 implementation to yaml format.
Signed-off-by: David Heidelberg <[email protected]>
---
v2:
- fix wrong path in binding $id
- comment qcom,mdp4 node example (we don't want to validate it yet)
.../bindings/iommu/msm,iommu-v0.txt | 64 -------------
.../bindings/iommu/qcom,iommu-v0.yaml | 96 +++++++++++++++++++
2 files changed, 96 insertions(+), 64 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
create mode 100644 Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
diff --git a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt b/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
deleted file mode 100644
index 20236385f26e..000000000000
--- a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
+++ /dev/null
@@ -1,64 +0,0 @@
-* QCOM IOMMU
-
-The MSM IOMMU is an implementation compatible with the ARM VMSA short
-descriptor page tables. It provides address translation for bus masters outside
-of the CPU, each connected to the IOMMU through a port called micro-TLB.
-
-Required Properties:
-
- - compatible: Must contain "qcom,apq8064-iommu".
- - reg: Base address and size of the IOMMU registers.
- - interrupts: Specifiers for the MMU fault interrupts. For instances that
- support secure mode two interrupts must be specified, for non-secure and
- secure mode, in that order. For instances that don't support secure mode a
- single interrupt must be specified.
- - #iommu-cells: The number of cells needed to specify the stream id. This
- is always 1.
- - qcom,ncb: The total number of context banks in the IOMMU.
- - clocks : List of clocks to be used during SMMU register access. See
- Documentation/devicetree/bindings/clock/clock-bindings.txt
- for information about the format. For each clock specified
- here, there must be a corresponding entry in clock-names
- (see below).
-
- - clock-names : List of clock names corresponding to the clocks specified in
- the "clocks" property (above).
- Should be "smmu_pclk" for specifying the interface clock
- required for iommu's register accesses.
- Should be "smmu_clk" for specifying the functional clock
- required by iommu for bus accesses.
-
-Each bus master connected to an IOMMU must reference the IOMMU in its device
-node with the following property:
-
- - iommus: A reference to the IOMMU in multiple cells. The first cell is a
- phandle to the IOMMU and the second cell is the stream id.
- A single master device can be connected to more than one iommu
- and multiple contexts in each of the iommu. So multiple entries
- are required to list all the iommus and the stream ids that the
- master is connected to.
-
-Example: mdp iommu and its bus master
-
- mdp_port0: iommu@7500000 {
- compatible = "qcom,apq8064-iommu";
- #iommu-cells = <1>;
- clock-names =
- "smmu_pclk",
- "smmu_clk";
- clocks =
- <&mmcc SMMU_AHB_CLK>,
- <&mmcc MDP_AXI_CLK>;
- reg = <0x07500000 0x100000>;
- interrupts =
- <GIC_SPI 63 0>,
- <GIC_SPI 64 0>;
- qcom,ncb = <2>;
- };
-
- mdp: qcom,mdp@5100000 {
- compatible = "qcom,mdp";
- ...
- iommus = <&mdp_port0 0
- &mdp_port0 2>;
- };
diff --git a/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
new file mode 100644
index 000000000000..6f166c30b9ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm IOMMU for APQ8064
+
+maintainers:
+ - Will Deacon <[email protected]>
+
+description: >
+ The MSM IOMMU is an implementation compatible with the ARM VMSA short
+ descriptor page tables. It provides address translation for bus masters
+ outside of the CPU, each connected to the IOMMU through a port called micro-TLB.
+
+properties:
+ compatible:
+ const: qcom,apq8064-iommu
+
+ clocks:
+ items:
+ - description: interface clock for register accesses
+ - description: functional clock for bus accesses
+
+ clock-names:
+ oneOf:
+ - items:
+ - const: smmu_pclk
+ - const: smmu_clk
+ - items:
+ - const: smmu_pclk
+ - const: iommu_clk
+ reg:
+ maxItems: 1
+
+ interrupts:
+ description: >
+ Specifiers for the MMU fault interrupts. For instances that
+ support secure mode two interrupts must be specified, for non-secure and
+ secure mode, in that order. For instances that don't support secure mode a
+ single interrupt must be specified.
+
+ "#iommu-cells":
+ const: 1
+
+ qcom,ncb:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: The total number of context banks in the IOMMU.
+
+# Each bus master connected to an IOMMU must reference the IOMMU
+# in its device node with the following property:
+# A reference to the IOMMU in multiple cells. The first cell is a
+# phandle to the IOMMU and the second cell is the stream id.
+# A single master device can be connected to more than one iommu
+# and multiple contexts in each of the iommu. So multiple entries
+# are required to list all the iommus and the stream ids that the
+# master is connected to.
+
+required:
+ - clocks
+ - clock-names
+ - reg
+ - interrupts
+ - qcom,ncb
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/qcom,mmcc-msm8960.h>
+
+ mdp_port0: iommu@7500000 {
+ compatible = "qcom,apq8064-iommu";
+ #iommu-cells = <1>;
+ clock-names =
+ "smmu_pclk",
+ "smmu_clk";
+ clocks =
+ <&clk SMMU_AHB_CLK>,
+ <&clk MDP_AXI_CLK>;
+ reg = <0x07500000 0x100000>;
+ interrupts =
+ <0 63 0>,
+ <0 64 0>;
+ qcom,ncb = <2>;
+ };
+
+ /* mdp: mdp@5100000 {
+ compatible = "qcom,mdp4";
+ ...
+
+ iommus = <&mdp_port0 0
+ &mdp_port0 2>;
+ };*/
--
2.34.1
On Sat, Dec 25, 2021 at 08:35:55PM +0100, David Heidelberg wrote:
> Convert Qualcomm IOMMU v0 implementation to yaml format.
>
> Signed-off-by: David Heidelberg <[email protected]>
> ---
> v2:
> - fix wrong path in binding $id
> - comment qcom,mdp4 node example (we don't want to validate it yet)
>
> .../bindings/iommu/msm,iommu-v0.txt | 64 -------------
> .../bindings/iommu/qcom,iommu-v0.yaml | 96 +++++++++++++++++++
qcom,apq8064-iommu.yaml
At this point, I don't think we'll get a 2nd user.
> 2 files changed, 96 insertions(+), 64 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
> create mode 100644 Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
>
> diff --git a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt b/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
> deleted file mode 100644
> index 20236385f26e..000000000000
> --- a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt
> +++ /dev/null
> @@ -1,64 +0,0 @@
> -* QCOM IOMMU
> -
> -The MSM IOMMU is an implementation compatible with the ARM VMSA short
> -descriptor page tables. It provides address translation for bus masters outside
> -of the CPU, each connected to the IOMMU through a port called micro-TLB.
> -
> -Required Properties:
> -
> - - compatible: Must contain "qcom,apq8064-iommu".
> - - reg: Base address and size of the IOMMU registers.
> - - interrupts: Specifiers for the MMU fault interrupts. For instances that
> - support secure mode two interrupts must be specified, for non-secure and
> - secure mode, in that order. For instances that don't support secure mode a
> - single interrupt must be specified.
> - - #iommu-cells: The number of cells needed to specify the stream id. This
> - is always 1.
> - - qcom,ncb: The total number of context banks in the IOMMU.
> - - clocks : List of clocks to be used during SMMU register access. See
> - Documentation/devicetree/bindings/clock/clock-bindings.txt
> - for information about the format. For each clock specified
> - here, there must be a corresponding entry in clock-names
> - (see below).
> -
> - - clock-names : List of clock names corresponding to the clocks specified in
> - the "clocks" property (above).
> - Should be "smmu_pclk" for specifying the interface clock
> - required for iommu's register accesses.
> - Should be "smmu_clk" for specifying the functional clock
> - required by iommu for bus accesses.
> -
> -Each bus master connected to an IOMMU must reference the IOMMU in its device
> -node with the following property:
> -
> - - iommus: A reference to the IOMMU in multiple cells. The first cell is a
> - phandle to the IOMMU and the second cell is the stream id.
> - A single master device can be connected to more than one iommu
> - and multiple contexts in each of the iommu. So multiple entries
> - are required to list all the iommus and the stream ids that the
> - master is connected to.
> -
> -Example: mdp iommu and its bus master
> -
> - mdp_port0: iommu@7500000 {
> - compatible = "qcom,apq8064-iommu";
> - #iommu-cells = <1>;
> - clock-names =
> - "smmu_pclk",
> - "smmu_clk";
> - clocks =
> - <&mmcc SMMU_AHB_CLK>,
> - <&mmcc MDP_AXI_CLK>;
> - reg = <0x07500000 0x100000>;
> - interrupts =
> - <GIC_SPI 63 0>,
> - <GIC_SPI 64 0>;
> - qcom,ncb = <2>;
> - };
> -
> - mdp: qcom,mdp@5100000 {
> - compatible = "qcom,mdp";
> - ...
> - iommus = <&mdp_port0 0
> - &mdp_port0 2>;
> - };
> diff --git a/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
> new file mode 100644
> index 000000000000..6f166c30b9ec
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml
> @@ -0,0 +1,96 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm IOMMU for APQ8064
> +
> +maintainers:
> + - Will Deacon <[email protected]>
> +
> +description: >
> + The MSM IOMMU is an implementation compatible with the ARM VMSA short
> + descriptor page tables. It provides address translation for bus masters
> + outside of the CPU, each connected to the IOMMU through a port called micro-TLB.
> +
> +properties:
> + compatible:
> + const: qcom,apq8064-iommu
> +
> + clocks:
> + items:
> + - description: interface clock for register accesses
> + - description: functional clock for bus accesses
> +
> + clock-names:
> + oneOf:
> + - items:
> + - const: smmu_pclk
> + - const: smmu_clk
> + - items:
> + - const: smmu_pclk
> + - const: iommu_clk
Where did this come from? It wasn't documented before.
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + description: >
> + Specifiers for the MMU fault interrupts. For instances that
> + support secure mode two interrupts must be specified, for non-secure and
> + secure mode, in that order. For instances that don't support secure mode a
> + single interrupt must be specified.
minItems: 1
items:
- description: non-secure irq...
- description: ...
> +
> + "#iommu-cells":
> + const: 1
> +
> + qcom,ncb:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description: The total number of context banks in the IOMMU.
> +
> +# Each bus master connected to an IOMMU must reference the IOMMU
> +# in its device node with the following property:
What property? No need to describe how the iommu binding works.
> +# A reference to the IOMMU in multiple cells. The first cell is a
> +# phandle to the IOMMU and the second cell is the stream id.
> +# A single master device can be connected to more than one iommu
> +# and multiple contexts in each of the iommu. So multiple entries
> +# are required to list all the iommus and the stream ids that the
> +# master is connected to.
Put the cells description under #iommu-cells.
> +
> +required:
> + - clocks
> + - clock-names
> + - reg
> + - interrupts
> + - qcom,ncb
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/qcom,mmcc-msm8960.h>
> +
> + mdp_port0: iommu@7500000 {
> + compatible = "qcom,apq8064-iommu";
> + #iommu-cells = <1>;
> + clock-names =
> + "smmu_pclk",
> + "smmu_clk";
> + clocks =
> + <&clk SMMU_AHB_CLK>,
> + <&clk MDP_AXI_CLK>;
> + reg = <0x07500000 0x100000>;
> + interrupts =
> + <0 63 0>,
> + <0 64 0>;
> + qcom,ncb = <2>;
> + };
> +
> + /* mdp: mdp@5100000 {
> + compatible = "qcom,mdp4";
> + ...
> +
> + iommus = <&mdp_port0 0
> + &mdp_port0 2>;
> + };*/
> --
> 2.34.1
>
>