On Wed, Jul 16, 2025 at 05:02:45PM +0200, Danilo Krummrich wrote: > This patch series adds the dma::Device trait to be implemented by bus devices on > DMA capable busses. > > The dma::Device trait implements methods to set the DMA mask for for such > devices. > > The first two bus devices implementing the trait are PCI and platform. > > Unfortunately, the DMA mask setters have to be unsafe for now, since, with > reasonable effort, we can't prevent drivers from data races writing and reading > the DMA mask fields concurrently (see also [1]). > > Link: https://lore.kernel.org/lkml/DB6YTN5P23X3.2S0NH4YECP1CP@xxxxxxxxxx/ [1] > Link: https://git.kernel.org/pub/scm/linux/kernel/git/dakr/linux.git/log/?h=rust/dma-mask > > Changes in v2: > - replace dma_bit_mask() with a new type DmaMask > - mention that DmaMask is the Rust equivalent of the C macro DMA_BIT_MASK() > - make DmaMask::new() fallible > - inline DmaMask methods I like the DmaMask stuff, nice! Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
