This patch series adds some basic GPU properties to the existing nova-drm
GETPARAM 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] although the
functionality of that series isn't actually required.
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.
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/20260628145406.2107056-1-dakr@kernel.org/
[2] - https://lore.kernel.org/driver-core/20260626183630.2585057-1-dakr@kernel.org/
[3] - https://github.com/apopple-nvidia/linux/tree/nova-drm
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Benno Lossin <lossin@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Eliot Courtney <ecourtney@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: linux-kernel@vger.kernel.org
Cc: nova-gpu@lists.linux.dev
Cc: dri-devel@lists.freedesktop.org
Cc: rust-for-linux@vger.kernel.org
Alistair Popple (7):
gpu: nova-core: Add public driver API to nova-core
drm: nova: Add DRM registration data
drm: nova: Add chipid enum to nova-drm UAPI
drm: nova: Add GETPARAM parameter to read the GPU chipid
drm: nova: Add GETPARAM parameter to read usable VRAM size
drm: nova: Use nova-core to read VRAM_BAR_SIZE parameter
drm: nova: Expose a render node
drivers/gpu/drm/nova/driver.rs | 17 +++++-
drivers/gpu/drm/nova/file.rs | 24 ++++----
drivers/gpu/nova-core/api.rs | 49 ++++++++++++++++
drivers/gpu/nova-core/driver.rs | 44 +++++++++++----
drivers/gpu/nova-core/gpu.rs | 80 ++++++++++++++-------------
drivers/gpu/nova-core/gsp/commands.rs | 8 +++
drivers/gpu/nova-core/gsp/hal.rs | 2 +-
drivers/gpu/nova-core/nova_core.rs | 1 +
include/uapi/drm/nova_drm.h | 47 ++++++++++++++++
9 files changed, 207 insertions(+), 65 deletions(-)
create mode 100644 drivers/gpu/nova-core/api.rs
--
2.54.0