This patch series deals with async migration and async vram management. It still leaves an important part out, which is async unbinding which will reduce latency further, at least when trying to migrate already active objects.
Patches 1/6 deals with accessing and waiting for the TTM moving fence from i915 GEM. Patch 2 is pure code reorganization, no functional change. Patch 3 breaks a refcounting loop involving the TTM moving fence. Patch 4 makes the i915 TTM shinking code handle async moves. Patch 5 uses TTM to implement the ttm move() callback async, it also introduces a utility to collect dependencies and turn them into a single dma_fence, which is needed for the intel_migrate code. This also affects the gem object migrate code. Patch 6 makes the object copy utility async as well, mainly for future users since the only current user, suspend backup and restore, typically will want to sync anyway.
v2: - Fix a couple of SPARSE warnings. v3: - Fix a NULL pointer dereference. v4: - Squash what was previously patch 1 and 2 to patch1 - Ditch the moving fence waiting in i915_vma_pin_iomap() - Rework how the refcounting loop is broken in patch 3. Drop region reference counting. - Break what is now patch 4 out of patch 5. Add support for avoiding waiting for gpu when shrinking. - A number of changes in patch 5. See the commit message for details.
Maarten Lankhorst (1): drm/i915: Add support for moving fence waiting
Thomas Hellström (5): drm/i915/ttm: Move the i915_gem_obj_copy_ttm() function drm/i915/ttm: Drop region reference counting drm/i915/ttm: Correctly handle waiting for gpu when shrinking drm/i915/ttm: Implement asynchronous TTM moves drm/i915/ttm: Update i915_gem_obj_copy_ttm() to be asynchronous
drivers/gpu/drm/i915/gem/i915_gem_object.c | 52 +++ drivers/gpu/drm/i915/gem/i915_gem_object.h | 6 + .../gpu/drm/i915/gem/i915_gem_object_types.h | 1 + drivers/gpu/drm/i915/gem/i915_gem_pages.c | 6 + drivers/gpu/drm/i915/gem/i915_gem_region.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 3 +- drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 1 + drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 6 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 89 ++-- drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 6 +- drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c | 405 ++++++++++++++++-- drivers/gpu/drm/i915/gem/i915_gem_ttm_move.h | 10 +- drivers/gpu/drm/i915/gem/i915_gem_ttm_pm.c | 3 + drivers/gpu/drm/i915/gem/i915_gem_wait.c | 4 +- .../gpu/drm/i915/gem/selftests/huge_pages.c | 2 +- drivers/gpu/drm/i915/gt/intel_region_lmem.c | 10 +- drivers/gpu/drm/i915/i915_vma.c | 36 +- drivers/gpu/drm/i915/intel_memory_region.c | 26 +- drivers/gpu/drm/i915/intel_memory_region.h | 9 +- drivers/gpu/drm/i915/intel_region_ttm.c | 35 +- drivers/gpu/drm/i915/intel_region_ttm.h | 2 +- .../drm/i915/selftests/intel_memory_region.c | 8 +- drivers/gpu/drm/i915/selftests/mock_region.c | 7 +- 23 files changed, 588 insertions(+), 143 deletions(-)