StarFive's JH8100 StarLink Cache Controller flush/invalidates cache using non-
conventional RISC-V Zicbom extension instructions. This driver provides the
cache handling on StarFive RISC-V SoC.
Joshua Yeong (2):
cache: Add StarFive StarLink cache management for StarFive JH8100
dt-bindings: cache: Add docs for StarFive Starlink cache controller
.../cache/starfive,jh8100-starlink-cache.yaml | 62 ++++++++
drivers/cache/Kconfig | 9 ++
drivers/cache/Makefile | 1 +
drivers/cache/starfive_starlink_cache.c | 132 ++++++++++++++++++
4 files changed, 204 insertions(+)
create mode 100644 Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
create mode 100644 drivers/cache/starfive_starlink_cache.c
--
Changes in v2:
- Change patch title from 'Add StarFive's StarLink-500 Cache Controller'
- Remove StarFive alternative from errata framework
- Fixes warning from https://lore.kernel.org/oe-kbuild-all/[email protected]/
- Flush completion through atomic timeout function
- Link to v1: https://lore.kernel.org/lkml/[email protected]/
Add DT binding documentation used by StarFive's
JH8100 SoC Starlink cache controller.
Signed-off-by: Joshua Yeong <[email protected]>
---
.../cache/starfive,jh8100-starlink-cache.yaml | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
diff --git a/Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml b/Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
new file mode 100644
index 000000000000..a8f39baca6cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/cache/starfive,starlink-500-cache.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive StarLink-500 Cache Controller
+
+maintainers:
+ - Joshua Yeong <[email protected]>
+
+description:
+ StarFive's JH8100 StarLink Cache Controller manages the L3 cache shared
+ between clusters of CPU cores. The cache driver enables RISC-V non-standard
+ cache management as an alternative to instructions in the RISC-V Zicbom
+ extension.
+
+allOf:
+ - $ref: /schemas/cache-controller.yaml#
+
+# We need a select here so we don't match all nodes with 'cache'
+select:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - starfive,jh8100-starlink-cache
+
+ required:
+ - compatible
+
+properties:
+ compatible:
+ items:
+ - const: starfive,jh8100-starlink-cache
+ - const: cache
+
+ reg:
+ maxItems: 1
+
+unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - cache-block-size
+ - cache-level
+ - cache-sets
+ - cache-size
+ - cache-unified
+
+examples:
+ - |
+ cache-controller@15000000 {
+ compatible = "starfive,jh8100-starlink-cache", "cache";
+ reg = <0x15000000 0x278>;
+ cache-block-size = <64>;
+ cache-level = <3>;
+ cache-sets = <8192>;
+ cache-size = <0x400000>;
+ cache-unified;
+ };
--
2.25.1
On Tue, 23 Apr 2024 15:26:39 +0800, Joshua Yeong wrote:
> Add DT binding documentation used by StarFive's
> JH8100 SoC Starlink cache controller.
>
> Signed-off-by: Joshua Yeong <[email protected]>
> ---
> .../cache/starfive,jh8100-starlink-cache.yaml | 62 +++++++++++++++++++
> 1 file changed, 62 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml: $id: Cannot determine base path from $id, relative path/filename doesn't match actual path or filename
$id: http://devicetree.org/schemas/cache/starfive,starlink-500-cache.yaml
file: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/cache/starfive,jh8100-starlink-cache.yaml
doc reference errors (make refcheckdocs):
See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/[email protected]
The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.
On Tue, Apr 23, 2024 at 03:26:39PM +0800, Joshua Yeong wrote:
> Add DT binding documentation used by StarFive's
> JH8100 SoC Starlink cache controller.
>
> Signed-off-by: Joshua Yeong <[email protected]>
Other than Rob's bot's report, this looks alight to me.