[PATCH v2 0/6] rust: add support for port io

[Alice Ryhl]

On Wed, May 14, 2025 at 12:58 PM Andrew Ballance
<andrewjballance at gmail.com> wrote:
>
> currently the rust `Io` type maps to the c read{b, w, l, q}/write{b, w, l, q}
> functions and have no support for port io. this can be a problem for pci::Bar
> because the pointer returned by pci_iomap can be either PIO or MMIO [0].
>
> this patch series splits the `Io` type into `Io`, and `MMIo`. `Io` can be
> used to access PIO or MMIO. `MMIo` can only access memory mapped IO but
> might, depending on the arch, be faster than `Io`. and updates pci::Bar,
> so that it is generic over Io and, a user can optionally give a compile
> time hint about the type of io.
>
> Link: https://docs.kernel.org/6.11/driver-api/pci/pci.html#c.pci_iomap [0]

This series seems to try and solve parts of the same problems as
Daniel's patchset:
https://lore.kernel.org/rust-for-linux/20250603-topics-tyr-platform_iomem-v9-0-a27e04157e3e@collabora.com/#r

We should probably align these two patchsets so that they do not add
incompatible abstractions for the same thing.

Alice