drm: Add search/get functions to get a block in a specific range
These are required for changes to TTM.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 1f0d717..a5c2773 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -226,6 +226,44 @@
}
EXPORT_SYMBOL(drm_mm_get_block_generic);
+struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *node,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end,
+ int atomic)
+{
+ struct drm_mm_node *align_splitoff = NULL;
+ unsigned tmp = 0;
+ unsigned wasted = 0;
+
+ if (node->start < start)
+ wasted += start - node->start;
+ if (alignment)
+ tmp = ((node->start + wasted) % alignment);
+
+ if (tmp)
+ wasted += alignment - tmp;
+ if (wasted) {
+ align_splitoff = drm_mm_split_at_start(node, wasted, atomic);
+ if (unlikely(align_splitoff == NULL))
+ return NULL;
+ }
+
+ if (node->size == size) {
+ list_del_init(&node->fl_entry);
+ node->free = 0;
+ } else {
+ node = drm_mm_split_at_start(node, size, atomic);
+ }
+
+ if (align_splitoff)
+ drm_mm_put_block(align_splitoff);
+
+ return node;
+}
+EXPORT_SYMBOL(drm_mm_get_block_range_generic);
+
/*
* Put a block. Merge with the previous and / or next block if they are free.
* Otherwise add to the free stack.
@@ -331,6 +369,56 @@
}
EXPORT_SYMBOL(drm_mm_search_free);
+struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end,
+ int best_match)
+{
+ struct list_head *list;
+ const struct list_head *free_stack = &mm->fl_entry;
+ struct drm_mm_node *entry;
+ struct drm_mm_node *best;
+ unsigned long best_size;
+ unsigned wasted;
+
+ best = NULL;
+ best_size = ~0UL;
+
+ list_for_each(list, free_stack) {
+ entry = list_entry(list, struct drm_mm_node, fl_entry);
+ wasted = 0;
+
+ if (entry->size < size)
+ continue;
+
+ if (entry->start > end || (entry->start+entry->size) < start)
+ continue;
+
+ if (entry->start < start)
+ wasted += start - entry->start;
+
+ if (alignment) {
+ register unsigned tmp = (entry->start + wasted) % alignment;
+ if (tmp)
+ wasted += alignment - tmp;
+ }
+
+ if (entry->size >= size + wasted) {
+ if (!best_match)
+ return entry;
+ if (size < best_size) {
+ best = entry;
+ best_size = entry->size;
+ }
+ }
+ }
+
+ return best;
+}
+EXPORT_SYMBOL(drm_mm_search_free_in_range);
+
int drm_mm_clean(struct drm_mm * mm)
{
struct list_head *head = &mm->ml_entry;
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 62329f9..b40b2f0 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -66,6 +66,13 @@
unsigned long size,
unsigned alignment,
int atomic);
+extern struct drm_mm_node *drm_mm_get_block_range_generic(
+ struct drm_mm_node *node,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end,
+ int atomic);
static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
unsigned long size,
unsigned alignment)
@@ -78,11 +85,38 @@
{
return drm_mm_get_block_generic(parent, size, alignment, 1);
}
+static inline struct drm_mm_node *drm_mm_get_block_range(
+ struct drm_mm_node *parent,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end)
+{
+ return drm_mm_get_block_range_generic(parent, size, alignment,
+ start, end, 0);
+}
+static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
+ struct drm_mm_node *parent,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end)
+{
+ return drm_mm_get_block_range_generic(parent, size, alignment,
+ start, end, 1);
+}
extern void drm_mm_put_block(struct drm_mm_node *cur);
extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
unsigned long size,
unsigned alignment,
int best_match);
+extern struct drm_mm_node *drm_mm_search_free_in_range(
+ const struct drm_mm *mm,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long start,
+ unsigned long end,
+ int best_match);
extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);