[v5,0/4] drm/i915: Move system memory to TTM for discrete

Message

Thomas Hellstrom June 14, 2021, 5:42 p.m. UTC

Early implementation of moving system memory for discrete cards over to
TTM. We first add the notion of objects being migratable under the object
lock to i915 gem, and add some asserts to verify that objects are either
locked or pinned when the placement is checked by the gem code.

Patch 2 and 3 deals with updating the i915 gem bookkeeping after a TTM move,
Patch 4 moves system over from shmem to TTM for discrete

Note that the mock device doesn't consider itself discrete so the TTM
system path is not checked by the mock selftests.

v2:
- Style fixes (reported by Matthew Auld)
- Drop the last patch (migration) It needs selftests and some additional work.
- Unconditionally add VM_IO at mmap time.

v3:
- More style fixes (reported by Matthew Auld)
- Don't overfill the busy placement vector (reported by Matthew Auld)

v4:
- Remove confusion around shrinkable objects (reported by Matthew Auld)

v5:
- Remove confusion around shrinkable objects again, but this time in the
  correct patch. (reported by Matthew Auld)

Thomas Hellström (4):
  drm/i915: Update object placement flags to be mutable
  drm/i915/ttm: Adjust gem flags and caching settings after a move
  drm/i915/ttm: Calculate the object placement at get_pages time
  drm/i915/ttm: Use TTM for system memory

 drivers/gpu/drm/i915/gem/i915_gem_internal.c  |   4 +-
 drivers/gpu/drm/i915/gem/i915_gem_mman.c      |  12 +-
 drivers/gpu/drm/i915/gem/i915_gem_object.c    |  38 +++
 drivers/gpu/drm/i915/gem/i915_gem_object.h    |  14 +-
 .../gpu/drm/i915/gem/i915_gem_object_types.h  |  20 +-
 drivers/gpu/drm/i915/gem/i915_gem_pages.c     |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_phys.c      |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_shmem.c     |  10 +-
 drivers/gpu/drm/i915/gem/i915_gem_ttm.c       | 224 ++++++++++++++----
 drivers/gpu/drm/i915/gem/i915_gem_userptr.c   |   4 +-
 .../drm/i915/gem/selftests/huge_gem_object.c  |   4 +-
 .../gpu/drm/i915/gem/selftests/huge_pages.c   |   5 +-
 .../drm/i915/gem/selftests/i915_gem_mman.c    |   4 +-
 .../drm/i915/gem/selftests/i915_gem_phys.c    |   3 +-
 drivers/gpu/drm/i915/i915_drv.h               |   3 -
 drivers/gpu/drm/i915/intel_memory_region.c    |   7 +-
 drivers/gpu/drm/i915/intel_memory_region.h    |   8 +
 drivers/gpu/drm/i915/intel_region_ttm.c       |   8 +-
 drivers/gpu/drm/i915/intel_region_ttm.h       |   2 +
 19 files changed, 278 insertions(+), 96 deletions(-)