Updates the 3D driver plan with the fourth-round status. Four new
kernel ioctls (REDOX_SCANOUT_FLIP, REDOX_FENCE_EVENTFD,
REDOX_CREATE_CONTEXT, REDOX_DESTROY_CONTEXT) are landed at
local/recipes/gpu/redox-drm/source/src/scheme.rs. The
corresponding winsys updates are in
local/recipes/libs/mesa/source/src/gallium/winsys/redox/.
Each new ioctl cross-references its Linux 7.1 source-pattern:
- REDOX_SCANOUT_FLIP: drivers/gpu/drm/drm_plane.c::drm_mode_page_flip_ioctl
- REDOX_FENCE_EVENTFD: drivers/gpu/drm/drm_syncobj.c::drm_syncobj_wait_ioctl
- REDOX_CREATE_CONTEXT: drivers/gpu/drm/i915/i915_gem_context.c
- REDOX_DESTROY_CONTEXT: ditto
The winsys update replaces the Phase 4 spin-loop fence with an
eventfd-backed wait (still using a stand-in eventfd until the
kernel adds epoll to the CS ring), and wires the surface_flush
path against REDOX_SCANOUT_FLIP (awaiting pipe_resource to fb
binding in the kernel).
Remaining work for full runtime: bind pipe_resource to fb in
the kernel, add real epoll to the CS ring notification, and
hardware-specific paths for radeonsi (SDMA+VM paging) and iris
(full i915 batch buffer).
vasilito
415bed6e39