Currently, using a raw IoPageTable is unsafe because the returned
IoPageTable is not tied to the device driver binding lifetime.
Since device drivers now receive a lifetime parameter <'bound>
representing the interval during which a device driver is bound to its bus
device, add a lifetime parameter to IoPageTable. This ensures that
the returned IoPageTable cannot outlive the bus device binding.
Also remove the option to create a page table as a device resource since
currently Devres is not compatible with resources that have a lifetime
parameter. This option can be restored once the lifetime-aware
wrapper for devres is available and if a use-case appears for it.
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Link: https://patch.msgid.link/20260703-pgtable_lt_b4-v3-1-e738e1f513a4@collabora.com
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
The Rust kernel code should be kept `rustdoc`-clean [1].
Our custom `srctree` link checker in the `rustdoc` target reports:
warning: srctree/ link to include/io-pgtable.h does not exist
Thus fix it.
Link: https://rust-for-linux.com/contributing#submit-checklist-addendum [1]
Fixes: 2e2f6b0ef8 ("rust: iommu: add io_pgtable abstraction")
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
The Rust kernel code should be kept `rustfmt`-clean [1].
Thus run the `rustfmt` target to fix the formatting issue.
Link: https://rust-for-linux.com/contributing#submit-checklist-addendum [1]
Fixes: 2e2f6b0ef8 ("rust: iommu: add io_pgtable abstraction")
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This will be used by the Tyr driver to create and modify the page table
of each address space on the GPU. Each time a mapping gets created or
removed by userspace, Tyr will call into GPUVM, which will figure out
which calls to map_pages and unmap_pages are required to map the data in
question in the page table so that the GPU may access those pages when
using that address space.
The Rust type wraps the struct using a raw pointer rather than the usual
Opaque+ARef approach because Opaque+ARef requires the target type to be
refcounted.
Signed-off-by: Asahi Lina <lina+kernel@asahilina.net>
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Tested-by: Deborah Brouwer <deborah.brouwer@collabora.com>
Co-developed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
[joro: Fixed up Rust import style]
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
