diff options
| author | Chris Wilson | 2017-05-25 22:48:18 +0200 |
|---|---|---|
| committer | Chris Wilson | 2017-05-30 12:46:23 +0200 |
| commit | b5a824250e4aac4fb76c5076b6a5e460e52c831a (patch) | |
| tree | 31c6eb755d898929548374a1a759ae486d1317cf /drivers/gpu/drm/i915/i915_gem_object.h | |
| parent | drm/i915: Convert intel_sdvo connector properties to atomic. (diff) | |
| download | kernel-qcow2-linux-b5a824250e4aac4fb76c5076b6a5e460e52c831a.tar.gz kernel-qcow2-linux-b5a824250e4aac4fb76c5076b6a5e460e52c831a.tar.xz kernel-qcow2-linux-b5a824250e4aac4fb76c5076b6a5e460e52c831a.zip | |
drm/i915: Add kerneldoc to describe i915_gem_object.vma_list
Add kerneldoc for the vma_list stored on the i915_gem_object, in
particular, documenting the expected ordering of elements -- i.e. that
we do expect GGTT VMA first followed by the ppGTT VMA.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170525204818.12044-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_object.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_object.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h index 35e1a27729dc..915057824284 100644 --- a/drivers/gpu/drm/i915/i915_gem_object.h +++ b/drivers/gpu/drm/i915/i915_gem_object.h @@ -68,8 +68,23 @@ struct drm_i915_gem_object { const struct drm_i915_gem_object_ops *ops; - /** List of VMAs backed by this object */ + /** + * @vma_list: List of VMAs backed by this object + * + * The VMA on this list are ordered by type, all GGTT vma are placed + * at the head and all ppGTT vma are placed at the tail. The different + * types of GGTT vma are unordered between themselves, use the + * @vma_tree (which has a defined order between all VMA) to find an + * exact match. + */ struct list_head vma_list; + /** + * @vma_tree: Ordered tree of VMAs backed by this object + * + * All VMA created for this object are placed in the @vma_tree for + * fast retrieval via a binary search in i915_vma_instance(). + * They are also added to @vma_list for easy iteration. + */ struct rb_root vma_tree; /** Stolen memory for this object, instead of being backed by shmem. */ |