[PATCH v2 0/8] dma::Coherent & dma::CoherentBox API

[Danilo Krummrich <dakr@kernel.org>]

This patch series introduces the dma::Coherent API Gary worked out in the
context of his I/O projection work.

Additionally, introduce dma::CoherentBox, a type that encapsulates a
dma::Coherent object before its DMA address is exposed to the device.
dma::CoherentBox can guarantee exclusive access to the inner dma::Coherent
object and implement Deref and DerefMut.

Also add Coherent::init() and Coherent::init_with_attrs() so we can directly
initialize a new dma::Coherent object through an impl Init<T, E>.

Changes in v2:
  - Rebase onto the DMA and nova-core fixes that went into -rc4.
  - Rename CoherentInit to CoherentBox.
  - Add a bunch of #[inline] attributes.
  - Remove a few unnecessary trait bounds in "rust: dma: add generalized
    container for types other than slices".
  - Fix a typo and convert core::ptr::from_mut(&mut self[i]) into
    &raw mut self[i].

Danilo Krummrich (5):
  rust: dma: use "kernel vertical" style for imports
  rust: dma: introduce dma::CoherentBox for memory initialization
  rust: dma: add Coherent:init() and Coherent::init_with_attrs()
  gpu: nova-core: use Coherent::init to initialize GspFwWprMeta
  gpu: nova-core: convert Gsp::new() to use CoherentBox

Gary Guo (3):
  rust: dma: add generalized container for types other than slices
  rust: dma: add zeroed constructor to `Coherent`
  gpu: nova-core: convert to new dma::Coherent API

 drivers/gpu/nova-core/dma.rs      |  19 +-
 drivers/gpu/nova-core/falcon.rs   |   5 +-
 drivers/gpu/nova-core/gsp.rs      |  68 ++--
 drivers/gpu/nova-core/gsp/boot.rs |   7 +-
 drivers/gpu/nova-core/gsp/cmdq.rs |  21 +-
 drivers/gpu/nova-core/gsp/fw.rs   | 128 +++---
 rust/kernel/device.rs             |   4 +-
 rust/kernel/dma.rs                | 632 +++++++++++++++++++++++-------
 samples/rust/rust_dma.rs          |   8 +-
 9 files changed, 626 insertions(+), 266 deletions(-)


base-commit: a19457958c3018783881c4416f272cd594f13049
-- 
2.53.0