[PATCH 0/6] DRM: Unified VMA Offset Manager

[David Herrmann]

Hi

I picked up the initial work from Dave [1], fixed several bugs, rewrote the
drm_mm node handling and adjusted the different drivers.
The series tries to replace the VMA-offset managers from GEM and TTM with a
single unified implementation. It uses the TTM RBTree idea to allow sub-mappings
(which wouldn't be feasible with hashtables).

Changes to Dave's v1:
 * Fixed a ref-count bug in TTM during object lookup
 * Use embedded drm_mm_node objects to avoid allocations
 * Document drm_vma_* API
 * Reviewed TTM locking
 * Fixed all new drivers
 * Use node->vm_pages instead of obj->size for GEM size calculations

Notes:
 * Tested on nouveau only! I will try to test i915 this week. However, the
   gem changes seem pretty trivial.
 * I couldn't even compile-test the ARM drivers. However, the omapdrm diffs
   are the only changes that are non-trivial. Is there any ongoing work to
   remove the arch-deps in DRM drivers?
 * _DRM_GEM is no longer used, but I guess we need to keep it for backwards
   compat?
 * If we replace node_list in drm_mm with an rbtree, we can drop it from
   drm_vma_offset_manager completely. However, I wanted to avoid heavy drm_mm
   changes and left this for follow up patches.
 * This is currently based on linux-3.10 from today. Next series will be
   rebased on drm-next/linux-next, but the current -next trees continously break
   my machines..
   But the only changes should be to fix additional drivers. I didn't see any
   other things to fix for drm-next.

Another series, which I will send later, adds "struct file" lists for each
drm-vma-offset so we can get access control over gem objects. Also, I have an
experimental series to remove the allocation helpers in drm_mm and let drivers
embed drm_mm_node instead. Lets see how that works out.

Comments welcome!
Cheers
David

[1]: http://cgit.freedesktop.org/~airlied/linux/log/?h=drm-vma-manager

David Herrmann (6):
  drm: make drm_mm_init() return void
  drm: mm: add drm_mm_node_linked() helper
  drm: add unified vma offset manager
  drm: gem: convert to new unified vma manager
  drm: ttm: convert to unified vma offset manager
  drm: provide generic drm_vma_node_unmap() helper

 drivers/gpu/drm/Makefile                   |   2 +-
 drivers/gpu/drm/ast/ast_main.c             |   2 +-
 drivers/gpu/drm/cirrus/cirrus_main.c       |   2 +-
 drivers/gpu/drm/drm_gem.c                  |  93 ++----------
 drivers/gpu/drm/drm_gem_cma_helper.c       |   9 +-
 drivers/gpu/drm/drm_mm.c                   |   5 +-
 drivers/gpu/drm/drm_vma_manager.c          | 224 +++++++++++++++++++++++++++++
 drivers/gpu/drm/exynos/exynos_drm_gem.c    |   7 +-
 drivers/gpu/drm/gma500/gem.c               |   8 +-
 drivers/gpu/drm/i915/i915_gem.c            |  13 +-
 drivers/gpu/drm/mgag200/mgag200_main.c     |   2 +-
 drivers/gpu/drm/nouveau/nouveau_display.c  |   2 +-
 drivers/gpu/drm/nouveau/nouveau_gem.c      |   2 +-
 drivers/gpu/drm/omapdrm/omap_gem.c         |  11 +-
 drivers/gpu/drm/omapdrm/omap_gem_helpers.c |  49 +------
 drivers/gpu/drm/qxl/qxl_object.h           |   2 +-
 drivers/gpu/drm/qxl/qxl_release.c          |   2 +-
 drivers/gpu/drm/radeon/radeon_object.h     |   5 +-
 drivers/gpu/drm/ttm/ttm_bo.c               |  82 ++---------
 drivers/gpu/drm/ttm/ttm_bo_manager.c       |   8 +-
 drivers/gpu/drm/ttm/ttm_bo_util.c          |   3 +-
 drivers/gpu/drm/ttm/ttm_bo_vm.c            |  81 ++++-------
 drivers/gpu/drm/udl/udl_gem.c              |   6 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c   |   4 +-
 include/drm/drmP.h                         |   7 +-
 include/drm/drm_mm.h                       |  11 +-
 include/drm/drm_vma_manager.h              | 122 ++++++++++++++++
 include/drm/ttm/ttm_bo_api.h               |  15 +-
 include/drm/ttm/ttm_bo_driver.h            |   7 +-
 include/uapi/drm/drm.h                     |   2 +-
 30 files changed, 464 insertions(+), 324 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_vma_manager.c
 create mode 100644 include/drm/drm_vma_manager.h

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1.8.3.2