intel: GEM Phase 10-12 — DMA-BUF, create params, LMEM allocator
gem_dmabuf.rs (65 lines):
DmaBufManager: export/import/release with fd→handle mapping
DmaBufExport/DmaBufImport structs with size tracking
Per-handle export ref-counting through GemObjectManager
gem_create.rs (40 lines):
CreateParams: size, region, flags, alignment, name
CreateManager::create() with param validation
create_lmem/create_named convenience constructors
gem_lmem.rs (60 lines):
LmemAllocator: linear allocator for discrete GPU VRAM
write_region/read_region with DWORD-aligned MMIO access
64KB alignment, used_bytes tracking, out-of-bounds checking
Ported from Linux 7.1:
gem/i915_gem_dmabuf.c → DmaBufManager
gem/i915_gem_create.c → CreateManager + CreateParams
gem/i915_gem_lmem.c → LmemAllocator
GEM subdirectory: 14 files, 1050 lines, 0 errors
vasilito
27e5326ee0