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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-02-18 17:59:14 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-02-23 10:32:51 +1000 |
| commit | b0b7af1884b7d807a3504804f9825d472de78708 (patch) | |
| tree | ba9e2dde9575caab3ae6f4b0a1d1ef15c09caf67 /include/drm/drm_mm.h | |
| parent | 9fc935debb33d90bf302ba42f7234b78e322f195 (diff) | |
| download | linux-b0b7af1884b7d807a3504804f9825d472de78708.tar.gz linux-b0b7af1884b7d807a3504804f9825d472de78708.tar.bz2 linux-b0b7af1884b7d807a3504804f9825d472de78708.zip | |
drm: mm: add api for embedding struct drm_mm_node
The old api has a two-step process: First search for a suitable
free hole, then allocate from that specific hole. No user used
this to do anything clever. So drop it for the embeddable variant
of the drm_mm api (the old one retains this ability, for the time
being).
With struct drm_mm_node embedded, we cannot track allocations
anymore by checking for a NULL pointer. So keep track of this
and add a small helper drm_mm_node_allocated.
Also add a function to move allocations between different struct
drm_mm_node.
v2: Implement suggestions by Chris Wilson.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm/drm_mm.h')
| -rw-r--r-- | include/drm/drm_mm.h | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h index 34fa36f2de70..17a070e11d3c 100644 --- a/include/drm/drm_mm.h +++ b/include/drm/drm_mm.h @@ -49,6 +49,7 @@ struct drm_mm_node { unsigned scanned_prev_free : 1; unsigned scanned_next_free : 1; unsigned scanned_preceeds_hole : 1; + unsigned allocated : 1; unsigned long start; unsigned long size; struct drm_mm *mm; @@ -73,6 +74,11 @@ struct drm_mm { unsigned long scan_end; }; +static inline bool drm_mm_node_allocated(struct drm_mm_node *node) +{ + return node->allocated; +} + static inline bool drm_mm_initialized(struct drm_mm *mm) { return mm->hole_stack.next; @@ -126,7 +132,15 @@ static inline struct drm_mm_node *drm_mm_get_block_atomic_range( return drm_mm_get_block_range_generic(parent, size, alignment, start, end, 1); } +extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, + unsigned long size, unsigned alignment); +extern int drm_mm_insert_node_in_range(struct drm_mm *mm, + struct drm_mm_node *node, + unsigned long size, unsigned alignment, + unsigned long start, unsigned long end); extern void drm_mm_put_block(struct drm_mm_node *cur); +extern void drm_mm_remove_node(struct drm_mm_node *node); +extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, unsigned long size, unsigned alignment, @@ -142,11 +156,6 @@ extern int drm_mm_init(struct drm_mm *mm, unsigned long start, unsigned long size); extern void drm_mm_takedown(struct drm_mm *mm); extern int drm_mm_clean(struct drm_mm *mm); -extern unsigned long drm_mm_tail_space(struct drm_mm *mm); -extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, - unsigned long size); -extern int drm_mm_add_space_to_tail(struct drm_mm *mm, - unsigned long size, int atomic); extern int drm_mm_pre_get(struct drm_mm *mm); static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) |