[PATCH v2 0/3] gpu: nova-core: falcon: use I/O projections for DMA transfers
Alexandre Courbot <[email protected]>
| Newsgroups | dev.linux.lists.driver-core,dev.linux.lists.nova-gpu,org.freedesktop.lists.dri-devel,org.kernel.vger.linux-kernel,org.kernel.vger.rust-for-linux |
|---|---|
| Message-ID | <[email protected]> |
Falcon DMA transfers were using cumbersome address arithmetic and explicit bounds checks to ensure a requested transfer is valid. This series replaces it with an I/O projection which, if successful, carries the same bounds guarantees and does not require performing operations on DMA addresses. The first patch removes a redundant check that is covered by the register's `try_with_...` family of methods. The second patch renames `dma_handle` to `dma_address` throughout the tree after comments received on v1. nova-core is the only user at the moment, so the renaming remains contained. Patch 3 switches to I/O projections in the Falcon code, the original motivation for this series. This series is based on drm-rust-next. Signed-off-by: Alexandre Courbot <[email protected]> --- Changes in v2: - Add a patch renaming `dma_handle` to `dma_address`. - Use `dma_address` consistently within nova-core. - Link to v1: https://patch.msgid.link/[email protected] --- Alexandre Courbot (3): gpu: nova-core: falcon: remove unnecessary check rust: dma: rename dma_handle to dma_address gpu: nova-core: falcon: use I/O projection to check transfer bounds drivers/gpu/nova-core/falcon.rs | 66 ++++++++------------ drivers/gpu/nova-core/fb.rs | 4 +- drivers/gpu/nova-core/firmware/booter.rs | 8 ++- drivers/gpu/nova-core/firmware/fwsec/bootloader.rs | 4 +- drivers/gpu/nova-core/firmware/gsp.rs | 6 +- drivers/gpu/nova-core/fsp.rs | 6 +- drivers/gpu/nova-core/gsp.rs | 2 +- drivers/gpu/nova-core/gsp/cmdq.rs | 8 +-- drivers/gpu/nova-core/gsp/fw.rs | 10 ++-- drivers/gpu/nova-core/gsp/hal/gh100.rs | 2 +- drivers/gpu/nova-core/gsp/hal/tu102.rs | 8 ++- drivers/gpu/nova-core/gsp/sequencer.rs | 8 +-- rust/kernel/dma.rs | 70 +++++++++++----------- 13 files changed, 95 insertions(+), 107 deletions(-) --- base-commit: 44e7e7f7cffb10a93bb88e7cb59b7b8b3e2deb1c change-id: 20260724-falcon-dma-projections-ea9343cfcdae Best regards, -- Alexandre Courbot <[email protected]>