[v1] gpu: nova-core: miscellaneous improvements

[PATCH 6/9] gpu: nova-core: gsp: derive Zeroable for GspStaticConfigInfo

Posted by Alexandre Courbot 1 week, 4 days ago

We can derive `Zeroable` automatically instead of implementing it
ourselves if we convert it from a tuple struct into a regular one. This
removes an `unsafe` statement.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
 drivers/gpu/nova-core/gsp/fw/commands.rs | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs b/drivers/gpu/nova-core/gsp/fw/commands.rs
index 21be44199693..85465521de32 100644
--- a/drivers/gpu/nova-core/gsp/fw/commands.rs
+++ b/drivers/gpu/nova-core/gsp/fw/commands.rs
@@ -107,12 +107,15 @@ unsafe impl FromBytes for PackedRegistryTable {}
 
 /// Payload of the `GetGspStaticInfo` command and message.
 #[repr(transparent)]
-pub(crate) struct GspStaticConfigInfo(bindings::GspStaticConfigInfo_t);
+#[derive(Zeroable)]
+pub(crate) struct GspStaticConfigInfo {
+    inner: bindings::GspStaticConfigInfo_t,
+}
 
 impl GspStaticConfigInfo {
     /// Returns a bytes array containing the (hopefully) zero-terminated name of this GPU.
     pub(crate) fn gpu_name_str(&self) -> [u8; 64] {
-        self.0.gpuNameString
+        self.inner.gpuNameString
     }
 }
 
@@ -122,7 +125,3 @@ unsafe impl AsBytes for GspStaticConfigInfo {}
 // SAFETY: This struct only contains integer types for which all bit patterns
 // are valid.
 unsafe impl FromBytes for GspStaticConfigInfo {}
-
-// SAFETY: This struct only contains integer types and fixed-size arrays for which
-// all bit patterns are valid.
-unsafe impl Zeroable for GspStaticConfigInfo {}

-- 
2.52.0

Re: [PATCH 6/9] gpu: nova-core: gsp: derive Zeroable for GspStaticConfigInfo

Posted by lyude@redhat.com 1 week ago

Reviewed-by: Lyude Paul <lyude@redhat.com>

On Mon, 2025-12-08 at 18:26 +0900, Alexandre Courbot wrote:
> We can derive `Zeroable` automatically instead of implementing it
> ourselves if we convert it from a tuple struct into a regular one.
> This
> removes an `unsafe` statement.
> 
> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
> ---
>  drivers/gpu/nova-core/gsp/fw/commands.rs | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/nova-core/gsp/fw/commands.rs
> b/drivers/gpu/nova-core/gsp/fw/commands.rs
> index 21be44199693..85465521de32 100644
> --- a/drivers/gpu/nova-core/gsp/fw/commands.rs
> +++ b/drivers/gpu/nova-core/gsp/fw/commands.rs
> @@ -107,12 +107,15 @@ unsafe impl FromBytes for PackedRegistryTable
> {}
>  
>  /// Payload of the `GetGspStaticInfo` command and message.
>  #[repr(transparent)]
> -pub(crate) struct
> GspStaticConfigInfo(bindings::GspStaticConfigInfo_t);
> +#[derive(Zeroable)]
> +pub(crate) struct GspStaticConfigInfo {
> +    inner: bindings::GspStaticConfigInfo_t,
> +}
>  
>  impl GspStaticConfigInfo {
>      /// Returns a bytes array containing the (hopefully) zero-
> terminated name of this GPU.
>      pub(crate) fn gpu_name_str(&self) -> [u8; 64] {
> -        self.0.gpuNameString
> +        self.inner.gpuNameString
>      }
>  }
>  
> @@ -122,7 +125,3 @@ unsafe impl AsBytes for GspStaticConfigInfo {}
>  // SAFETY: This struct only contains integer types for which all bit
> patterns
>  // are valid.
>  unsafe impl FromBytes for GspStaticConfigInfo {}
> -
> -// SAFETY: This struct only contains integer types and fixed-size
> arrays for which
> -// all bit patterns are valid.
> -unsafe impl Zeroable for GspStaticConfigInfo {}