On 2026-08-28 at 13:35 +1000, Alistair Popple <[email protected]> wrote... > This patch series adds some basic GPU properties via a new GPU info > ioctl. It builds on top of the "drm: Higher-Ranked Lifetime private data" > series[1] to correctly manage lifetimes of registration data shared between > DRM, auxbus and nova-core. It's also based on top of "ForLt/CovariantForLt > split, auxiliary closure API and DevresLt"[2] > > A tree with this series applied on top of all pre-requisites is available > at [3]. > > Properties are exported via a new NovaCoreApi type which implements methods > to read data from the GPU. This has been implemented in a separate module > to make the public API implementations obvious and to keep them in one > place. Auxiliary bus drivers can obtain a handle to this type using > NovaCoreApi::of(). > > This handle can then be stored as part of the DRM registration data and > used to interact with the GPU via the nova-core driver. > > A new info ioctl is introduced which provides an info type field and a > method for reading extendable structs containing GPU information. This > series can be tested using the drm-test[4]. A pull request containing > updated tests will be raised once this has been posted.
Pull request is here: https://gitlab.freedesktop.org/dakr/drm-test/-/merge_requests/1 > A pull request for > Mesa has also been raised but is out of date. That will be updated once > this series has been merged. > > Changes since v4: > > - No longer export chip-id, instead export architecture and implementation > - Add a separate info ioctl with types to read GPU info as suggested by > Danilo > > Changes since v3: > > - Use an ioctl to return all parameters rather than multiple key/value > queries > > Changes since v2: > > - Addressed review Danilo and Alex > - Minor renames to better align with HW based on internal feedback > > Changes since v1: > > - Address review comments from Danilo > - Add an API call to read VRAM PCI BAR size using nova-core > > [1] - > https://lore.kernel.org/rust-for-linux/[email protected]/ > [2] - > https://lore.kernel.org/driver-core/[email protected]/ > [3] - https://github.com/apopple-nvidia/linux/tree/nova-drm > [4] - https://gitlab.freedesktop.org/dakr/drm-test > > Cc: M Henning <[email protected]> > Cc: Danilo Krummrich <[email protected]> > Cc: Alice Ryhl <[email protected]> > Cc: David Airlie <[email protected]> > Cc: Alexandre Courbot <[email protected]> > Cc: Benno Lossin <[email protected]> > Cc: Gary Guo <[email protected]> > Cc: Eliot Courtney <[email protected]> > Cc: John Hubbard <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > > Alistair Popple (11): > gpu: nova-core: Add public driver API to nova-core > drm: nova: Add DRM registration data > drm: nova: Add GPU architecture enum to nova-drm UAPI > rust: uaccess: add UserSliceWriter::write_truncated() > drm: nova: Add an info ioctl > drm: nova: Add usable VRAM size to GPU info > drm: nova: Use nova-core to read VRAM_BAR_SIZE parameter > drm: nova: Expose a render node > drm: nova: Report GPU name in GPU info > drm: nova: Report GPU short name in GPU info > drm: nova: Report GPU GID in GPU info > > drivers/gpu/drm/nova/driver.rs | 18 ++++- > drivers/gpu/drm/nova/file.rs | 83 ++++++++++++++++++++---- > drivers/gpu/nova-core/api.rs | 68 +++++++++++++++++++ > drivers/gpu/nova-core/driver.rs | 46 +++++++++---- > drivers/gpu/nova-core/gpu.rs | 43 +++++++----- > drivers/gpu/nova-core/gsp/commands.rs | 27 ++++++++ > drivers/gpu/nova-core/gsp/fw/commands.rs | 12 ++++ > drivers/gpu/nova-core/gsp/hal.rs | 2 +- > drivers/gpu/nova-core/nova_core.rs | 1 + > drivers/gpu/nova-core/num.rs | 2 +- > include/uapi/drm/nova_drm.h | 82 +++++++++++++++++++++++ > rust/kernel/uaccess.rs | 14 ++++ > 12 files changed, 352 insertions(+), 46 deletions(-) > create mode 100644 drivers/gpu/nova-core/api.rs > > -- > 2.54.0 >
