[PATCH v3 0/4] Implement clear VRAM on free

[Matthew Brost]

Do not use a delayed worker to destroy BO VMAs. Drop the BO argument
from xe_migrate_clear, as this function can be called with a BO that has
a zero reference count. Finally, implement VRAM clearing on free.

Avoiding a delayed worker for BO VMA destruction ensures timely
finalization of the BO during unbind, which should improve the
performance of clear-on-free. This change is therefore included in this
series.

v3:
 - Fix kunit

Matt

Matthew Brost (4):
  drm/xe: Only use delayed worker to destroy userptr VMAs
  drm/xe: Drop BO argument from xe_migrate_clear
  drm/xe: Add xe_bo_tt_has_data helper
  drm/xe: Implement clear VRAM on free

 drivers/gpu/drm/xe/tests/xe_migrate.c | 22 +++++---
 drivers/gpu/drm/xe/xe_bo.c            | 75 +++++++++++++++++++++++--
 drivers/gpu/drm/xe/xe_bo.h            |  2 +
 drivers/gpu/drm/xe/xe_migrate.c       | 50 +++++++++++------
 drivers/gpu/drm/xe/xe_migrate.h       |  9 ++-
 drivers/gpu/drm/xe/xe_res_cursor.h    | 26 +++++++++
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.c  |  6 +-
 drivers/gpu/drm/xe/xe_ttm_vram_mgr.h  |  6 ++
 drivers/gpu/drm/xe/xe_vm.c            | 80 ++++++++++++++-------------
 drivers/gpu/drm/xe/xe_vm_types.h      | 13 ++---
 10 files changed, 213 insertions(+), 76 deletions(-)

-- 
2.34.1