We want to be able to explicitly migrate objects between gem memory regions, initially for display and dma-buf, but there might be more use-cases coming up.
Introduce a gem migrate interface, add a selftest and use it for display fb pinning and dma-buf mapping.
This series should make accelerated desktop work on DG1 with DG1-enabled OpenGL.
v2: - Address review comments by Matthew Auld on patch 1/5. More details on the patch commit message. - Address a dma-buf locking issue pointed out by Michael Ruhl, and add a selftest to catch that issue moving forward. - Rebase the dma-buf migration patch on the above-mentioned fix.
v3: - Fix i915_gem_object_can_migrate() to return true if object is already in the correct region, even if the object ops doesn't have a migrate() callback. - Update typo in commit message.
v4: - Ditch dma-buf patches for now. - Improve documentation (Suggested by Mattew Auld and Michael Ruhl) - Always assume TTM migration hits a TTM move and unsets the pages through move_notify. (Reported by Matthew Auld) - Add a dma_fence_might_wait() annotation to i915_gem_object_wait_migration() (Suggested by Daniel Vetter) - Selftest updates (See specifics on that patch). - Added R-Bs v5: - Re-add might_sleep() annotation to i915_gem_object_wait_migration() - Added R-B.
Matthew Auld (1): drm/i915/gem: Introduce a selftest for the gem object migrate functionality
Thomas Hellström (2): drm/i915/gem: Implement object migration drm/i915/display: Migrate objects to LMEM if possible for display
drivers/gpu/drm/i915/display/intel_display.c | 5 +- drivers/gpu/drm/i915/gem/i915_gem_domain.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 21 -- drivers/gpu/drm/i915/gem/i915_gem_object.c | 113 ++++++++ drivers/gpu/drm/i915/gem/i915_gem_object.h | 12 +- .../gpu/drm/i915/gem/i915_gem_object_types.h | 9 + drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 77 +++++- drivers/gpu/drm/i915/gem/i915_gem_wait.c | 19 ++ .../drm/i915/gem/selftests/i915_gem_migrate.c | 258 ++++++++++++++++++ .../drm/i915/selftests/i915_live_selftests.h | 1 + 10 files changed, 481 insertions(+), 36 deletions(-) create mode 100644 drivers/gpu/drm/i915/gem/selftests/i915_gem_migrate.c