[PATCH v4 0/7] gpu: nova: Export parameters from nova-core to nova-drm

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] 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 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

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 (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 a GPU info ioctl
  drm: nova: Add usable VRAM size to GPU info ioctl
  drm: nova: Use nova-core to read VRAM_BAR_SIZE parameter
  drm: nova: Expose a render node

 drivers/gpu/drm/nova/driver.rs        | 18 ++++++-
 drivers/gpu/drm/nova/file.rs          | 40 +++++++++-----
 drivers/gpu/nova-core/api.rs          | 49 +++++++++++++++++
 drivers/gpu/nova-core/driver.rs       | 44 +++++++++++----
 drivers/gpu/nova-core/gpu.rs          | 78 ++++++++++++++-------------
 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           | 71 ++++++++++++++++++++++++
 9 files changed, 247 insertions(+), 64 deletions(-)
 create mode 100644 drivers/gpu/nova-core/api.rs

-- 
2.54.0