Require the Bound device context to be able to create new
dma::CoherentAllocation instances.
DMA memory allocations are only valid to be created for bound devices.
Link: https://lore.kernel.org/r/20250413173758.12068-10-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Stephen found a future build failure in linux-next [1]:
error[E0277]: `*mut MyStruct` cannot be sent between threads safely
--> samples/rust/rust_dma.rs:47:22
|
47 | impl pci::Driver for DmaSampleDriver {
| ^^^^^^^^^^^^^^^ `*mut MyStruct` cannot be sent between threads safely
It is caused by the interaction between commit 935e1d90bf ("rust: pci:
require Send for Driver trait implementers") from the driver-core tree,
which fixes a missing concurrency requirement, and commit 9901addae6
("samples: rust: add Rust dma test sample driver") which adds a sample
that does not satisfy that requirement.
Add a `Send` implementation to `CoherentAllocation`, which allows the
sample (and other future users) to satisfy it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20250324215702.1515ba92@canb.auug.org.au/ [1]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20250324174048.1075597-1-ojeda@kernel.org
[ Added number to Closes. Fix typo spotted by Boqun. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Add a simple dma coherent allocator rust abstraction. Based on
Andreas Hindborg's dma abstractions from the rnvme driver, which
was also based on earlier work by Wedson Almeida Filho.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@gmail.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://lore.kernel.org/r/20250317185345.2608976-3-abdiel.janulgue@gmail.com
Nacked-by: Christoph Hellwig <hch@lst.de>
[ Removed period. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
