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 and 2/6 deal with accessing and waiting for the TTM moving fence from i915 GEM. Patch 3 is pure code reorganization, no functional change. Patch 4 breaks a refcounting loop involving the TTM moving fence. 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 so. 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.
Maarten Lankhorst (2): drm/i915: Add functions to set/get moving fence drm/i915: Add support for asynchronous moving fence waiting
Thomas Hellström (4): drm/i915/ttm: Move the i915_gem_obj_copy_ttm() function drm/i915/ttm: Break refcounting loops at device region unref time drm/i915/ttm: Implement asynchronous TTM moves drm/i915/ttm: Update i915_gem_obj_copy_ttm() to be asynchronous
drivers/gpu/drm/i915/display/intel_fbdev.c | 7 +- drivers/gpu/drm/i915/display/intel_overlay.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_object.c | 37 ++ drivers/gpu/drm/i915/gem/i915_gem_object.h | 9 + drivers/gpu/drm/i915/gem/i915_gem_pages.c | 6 + drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 58 +-- drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 6 +- drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c | 396 ++++++++++++++++-- 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 +- .../i915/gem/selftests/i915_gem_coherency.c | 4 +- .../drm/i915/gem/selftests/i915_gem_mman.c | 22 +- drivers/gpu/drm/i915/gt/intel_region_lmem.c | 1 + drivers/gpu/drm/i915/i915_vma.c | 39 +- drivers/gpu/drm/i915/i915_vma.h | 3 + drivers/gpu/drm/i915/intel_memory_region.c | 5 +- drivers/gpu/drm/i915/intel_memory_region.h | 1 + drivers/gpu/drm/i915/intel_region_ttm.c | 28 ++ drivers/gpu/drm/i915/intel_region_ttm.h | 2 + drivers/gpu/drm/i915/selftests/i915_vma.c | 4 +- 21 files changed, 538 insertions(+), 109 deletions(-)