Implement redox_private_cs_submit() in the Intel GpuDriver,
completing Phase 4 (Render Path). This is the userspace GPU
command submission interface used by Mesa.
- redox_private_cs_submit(): map source GEM buffer to GPU address,
extract batch commands as u32 slice from src_offset with
byte_count dwords, submit to render ring via ring.submit_batch()
- Returns RedoxPrivateCsSubmitResult with seqno (0 for now —
fence integration deferred)
This completes all 4 modules of Phase 4:
batch.rs ✅ fence.rs ✅ execlists.rs ✅ Mesa winsys ✅
Remaining across all phases:
Phase 2: DBUF detailed programming
Phase 3: Atomic modesetting (requires scheme.rs changes)
vasilito
ec2ac74f5d