Second version of this patchset addressing Ben's comments and fixing a few extra things.
This patchset proposes to introduce a "staging" module option to dynamically enable features (mostly ioctls) that are merged but may be refined before they are declared "stable". The second patch illustrates the use of this staging option with the SET_TILING ioctl, which can be used to specify the tiling options of a PRIME-imported buffer.
The staging parameter will allow us (particularly, us at NVIDIA) to experiment more freely with new features and avoid carrying out-of-tree patches for long periods of time. To prevent abuse, the number of staging ioctls is limited to 8 (range 0x98 to 0xa0) that are to be recycled as staging ioctls become stable and are assigned a final number.
Changes since v1: - Use one module option per staging ioctl - Only allow GEM_SET_TILING to be called on dma-buf imported buffers - Move the code setting nvkm_mem::memtype into its own function to avoid duplicating code
Alexandre Courbot (1): drm/nouveau: placeholders for staging ioctls
Ari Hirvonen (1): drm/nouveau: add GEM_SET_TILING staging ioctl
drm/nouveau/nouveau_bo.c | 18 ++++++++++++ drm/nouveau/nouveau_bo.h | 2 ++ drm/nouveau/nouveau_drm.c | 7 +++++ drm/nouveau/nouveau_gem.c | 58 ++++++++++++++++++++++++++++++++++++++ drm/nouveau/nouveau_gem.h | 2 ++ drm/nouveau/nouveau_ttm.c | 13 +-------- drm/nouveau/uapi/drm/nouveau_drm.h | 11 ++++++++ 7 files changed, 99 insertions(+), 12 deletions(-)