[PATCH 0/1] gpu: nova-core: add SizeConstants trait for SZ_* constants

[PATCH 0/1] gpu: nova-core: add SizeConstants trait for SZ_* constants

[John Hubbard]

v6 is here:
    https://lore.kernel.org/all/20260411024118.471294-1-jhubbard@nvidia.com/

Changes in v7:

* v6 patch 1/2 was already applied as commit 98e508e5b016 ("gpu:
  nova-core: use SizeConstants trait for u64 size constants") on
  drm-rust-next, so this series is now a single standalone patch.

* Moved the todo entry to Documentation/gpu/todo.rst per Danilo's
  suggestion.

John Hubbard (1):
  gpu: add todo entry for device address type wrappers

 Documentation/gpu/todo.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)


base-commit: 99676aed1fec109d62822e21a06760eb098dc5f4
-- 
2.54.0

[PATCH 1/1] gpu: add todo entry for device address type wrappers

[John Hubbard]

The SizeConstants trait provides SZ_* size constants for 32-bit,
64-bit, and pointer-sized integers. Device-centric DRM APIs such
as GPU VM management and buddy allocators could benefit from newtype
wrappers around those integer types for device addresses and sizes.
Add a todo entry to track designing those wrappers and a marker trait
for use as a generic bound.

Suggested-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 Documentation/gpu/todo.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
index cdddf8db35f5..d7dbe8b298ce 100644
--- a/Documentation/gpu/todo.rst
+++ b/Documentation/gpu/todo.rst
@@ -686,6 +686,20 @@ Contact: Thomas Zimmermann <tzimmermann@suse.de>
 
 Level: Advanced
 
+Device address type wrappers
+-----------------------------
+
+The ``SizeConstants`` trait provides ``SZ_*`` constants as associated constants
+on ``u32``, ``u64``, and ``usize``. Device-centric APIs such as GPU VM
+management and buddy allocators could benefit from newtype wrappers around these
+integer types to represent device addresses and sizes. A separate marker trait
+could then serve as a generic bound for those wrappers. See the `original
+discussion <https://lore.kernel.org/all/DHJJJNP5T5FZ.2HWBMOEEKH9ZR@kernel.org/>`_.
+
+Contact: Danilo Krummrich <dakr@kernel.org>
+
+Level: Intermediate
+
 Better Testing
 ==============
 
-- 
2.54.0

Re: [PATCH 0/1] gpu: nova-core: add SizeConstants trait for SZ_* constants

[John Hubbard]

On 6/3/26 5:39 PM, John Hubbard wrote:
> v6 is here:
>     https://lore.kernel.org/all/20260411024118.471294-1-jhubbard@nvidia.com/
> 
> Changes in v7:

And actually, the subject line should have said [PATCH v7..., but
I somehow omitted that by accident here.


thanks,
-- 
John Hubbard

> 
> * v6 patch 1/2 was already applied as commit 98e508e5b016 ("gpu:
>   nova-core: use SizeConstants trait for u64 size constants") on
>   drm-rust-next, so this series is now a single standalone patch.
> 
> * Moved the todo entry to Documentation/gpu/todo.rst per Danilo's
>   suggestion.
> 
> John Hubbard (1):
>   gpu: add todo entry for device address type wrappers
> 
>  Documentation/gpu/todo.rst | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> 
> base-commit: 99676aed1fec109d62822e21a06760eb098dc5f4