[RFC PATCH 0/3] Propose new struct drm_mem_region

[Brian Welty]

This RFC series is first implementation of some ideas expressed
earlier on dri-devel [1].

Some of the goals (open for much debate) are:
  - Create common base structure (subclass) for memory regions (patch #1)
  - Create common memory region types (patch #2)
  - Create common set of memory_region function callbacks (based on
    ttm_mem_type_manager_funcs and intel_memory_regions_ops)
  - Create common helpers that operate on drm_mem_region to be leveraged
    by both TTM drivers and i915, reducing code duplication
  - Above might start with refactoring ttm_bo_manager.c as these are
    helpers for using drm_mm's range allocator and could be made to
    operate on DRM structures instead of TTM ones.
  - Larger goal might be to make LRU management of GEM objects common, and
    migrate those fields into drm_mem_region and drm_gem_object strucures.

Patches 1-2 implement the proposed struct drm_mem_region and adds
associated common set of definitions for memory region type.

Patch #3 is update to i915 and is based upon another series which is
in progress to add vram support to i915 [2].

[1] https://lists.freedesktop.org/archives/dri-devel/2019-June/224501.html
[2] https://lists.freedesktop.org/archives/intel-gfx/2019-June/203649.html

Brian Welty (3):
  drm: introduce new struct drm_mem_region
  drm: Introduce DRM_MEM defines for specifying type of drm_mem_region
  drm/i915: Update intel_memory_region to use nested drm_mem_region

 drivers/gpu/drm/i915/gem/i915_gem_object.c    |  2 +-
 drivers/gpu/drm/i915/gem/i915_gem_shmem.c     |  2 +-
 drivers/gpu/drm/i915/i915_gem_gtt.c           | 10 +++---
 drivers/gpu/drm/i915/i915_gpu_error.c         |  2 +-
 drivers/gpu/drm/i915/i915_query.c             |  2 +-
 drivers/gpu/drm/i915/intel_memory_region.c    | 10 +++---
 drivers/gpu/drm/i915/intel_memory_region.h    | 19 +++-------
 drivers/gpu/drm/i915/intel_region_lmem.c      | 26 +++++++-------
 .../drm/i915/selftests/intel_memory_region.c  |  8 ++---
 drivers/gpu/drm/ttm/ttm_bo.c                  | 34 ++++++++++--------
 drivers/gpu/drm/ttm/ttm_bo_manager.c          | 14 ++++----
 drivers/gpu/drm/ttm/ttm_bo_util.c             | 11 +++---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c |  8 ++---
 drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c    |  4 +--
 include/drm/drm_mm.h                          | 35 +++++++++++++++++++
 include/drm/ttm/ttm_bo_api.h                  |  2 +-
 include/drm/ttm/ttm_bo_driver.h               | 16 ++++-----
 include/drm/ttm/ttm_placement.h               |  8 ++---
 18 files changed, 122 insertions(+), 91 deletions(-)

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2.21.0