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authorDaniel Vetter <daniel.vetter@ffwll.ch>2011-02-18 17:59:14 +0100
committerDave Airlie <airlied@redhat.com>2011-02-23 10:32:51 +1000
commitb0b7af1884b7d807a3504804f9825d472de78708 (patch)
treeba9e2dde9575caab3ae6f4b0a1d1ef15c09caf67 /include/drm
parent9fc935debb33d90bf302ba42f7234b78e322f195 (diff)
downloadop-kernel-dev-b0b7af1884b7d807a3504804f9825d472de78708.zip
op-kernel-dev-b0b7af1884b7d807a3504804f9825d472de78708.tar.gz
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')
-rw-r--r--include/drm/drm_mm.h19
1 files changed, 14 insertions, 5 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 34fa36f..17a070e 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)
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