This series adds Rust abstractions for the auxiliary bus.

It implements the required abstractions to write auxiliary drivers and create
auxiliary device registrations. A driver sample illustrates how the
corresponding abstractions work.

The auxiliary abstractions are required for the Nova driver project, in order to
connect nova-core with the nova-drm driver.

This patch series depends on [1] (taken through the nova tree for v6.15); a
branch containing the patches, including the dependency can be found in [2].

[1] https://lore.kernel.org/rust-for-linux/20250306222336.23482-2-dakr@kernel.org/
[2] https://web.git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/auxiliary

Danilo Krummrich (4):
  rust: types: add `Opaque::zeroed`
  rust: auxiliary: add auxiliary driver abstractions
  rust: auxiliary: add auxiliary registration
  samples: rust: add Rust auxiliary driver sample

 MAINTAINERS                           |   2 +
 rust/bindings/bindings_helper.h       |   1 +
 rust/helpers/auxiliary.c              |  23 ++
 rust/helpers/helpers.c                |   1 +
 rust/kernel/auxiliary.rs              | 311 ++++++++++++++++++++++++++
 rust/kernel/lib.rs                    |   2 +
 rust/kernel/types.rs                  |   8 +
 samples/rust/Kconfig                  |  10 +
 samples/rust/Makefile                 |   1 +
 samples/rust/rust_driver_auxiliary.rs |  99 ++++++++
 10 files changed, 458 insertions(+)
 create mode 100644 rust/helpers/auxiliary.c
 create mode 100644 rust/kernel/auxiliary.rs
 create mode 100644 samples/rust/rust_driver_auxiliary.rs


base-commit: b28786b190d1ae2df5e6a5181ad78c6f226ea3e1
-- 
2.48.1

On Wed, Mar 12, 2025 at 01:19:06AM +0100, Danilo Krummrich wrote:
> This series adds Rust abstractions for the auxiliary bus.
> 
> It implements the required abstractions to write auxiliary drivers and create
> auxiliary device registrations. A driver sample illustrates how the
> corresponding abstractions work.
> 
> The auxiliary abstractions are required for the Nova driver project, in order to
> connect nova-core with the nova-drm driver.

Nice!

> This patch series depends on [1] (taken through the nova tree for v6.15); a
> branch containing the patches, including the dependency can be found in [2].
> 
> [1] https://lore.kernel.org/rust-for-linux/20250306222336.23482-2-dakr@kernel.org/
> [2] https://web.git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/auxiliary

Do you want this to wait until that lands in 6.15-rc1 or do you want to
take this now through the nova tree?  Either is fine with me.

thanks,

greg k-h

On Wed, Mar 12, 2025 at 08:14:24AM +0100, Greg KH wrote:
> On Wed, Mar 12, 2025 at 01:19:06AM +0100, Danilo Krummrich wrote:
> > This series adds Rust abstractions for the auxiliary bus.
> > 
> > It implements the required abstractions to write auxiliary drivers and create
> > auxiliary device registrations. A driver sample illustrates how the
> > corresponding abstractions work.
> > 
> > The auxiliary abstractions are required for the Nova driver project, in order to
> > connect nova-core with the nova-drm driver.
> 
> Nice!
> 
> > This patch series depends on [1] (taken through the nova tree for v6.15); a
> > branch containing the patches, including the dependency can be found in [2].
> > 
> > [1] https://lore.kernel.org/rust-for-linux/20250306222336.23482-2-dakr@kernel.org/
> > [2] https://web.git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/auxiliary
> 
> Do you want this to wait until that lands in 6.15-rc1 or do you want to
> take this now through the nova tree?  Either is fine with me.

Thanks! Let's wait for things to land in Linus' tree and give people some time
to review.

I will also send a v2 soon, fixing up a soundness issue I'm also working on
a fix for platform and PCI.