Commit 89579f77 authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
Browse files

drm: Apply "Memory fragmentation from lost alignment blocks" 



also for the atomic path by using a common code-path.

Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 78ecf091

drivers/gpu/drm/drm_mm.c

+7 −41
Original line number Diff line number Diff line
@@ -187,9 +187,10 @@ static struct drm_mm_node *drm_mm_split_at_start(struct drm_mm_node *parent, 
}







struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *node,

				     unsigned long size, unsigned alignment)

struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,

					     unsigned long size,

					     unsigned alignment,

					     int atomic)

{



	struct drm_mm_node *align_splitoff = NULL;
@@ -200,7 +201,7 @@ struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *node, 


	if (tmp) {

		align_splitoff =

		    drm_mm_split_at_start(node, alignment - tmp, 0);

		    drm_mm_split_at_start(node, alignment - tmp, atomic);

		if (unlikely(align_splitoff == NULL))

			return NULL;

	}
@@ -209,7 +210,7 @@ struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *node, 
		list_del_init(&node->fl_entry);

		node->free = 0;

	} else {

		node = drm_mm_split_at_start(node, size, 0);

		node = drm_mm_split_at_start(node, size, atomic);

	}



	if (align_splitoff)
@@ -217,42 +218,7 @@ struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *node, 


	return node;

}



EXPORT_SYMBOL(drm_mm_get_block);



struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,

					    unsigned long size,

					    unsigned alignment)

{



	struct drm_mm_node *align_splitoff = NULL;

	struct drm_mm_node *child;

	unsigned tmp = 0;



	if (alignment)

		tmp = parent->start % alignment;



	if (tmp) {

		align_splitoff =

		    drm_mm_split_at_start(parent, alignment - tmp, 1);

		if (unlikely(align_splitoff == NULL))

			return NULL;

	}



	if (parent->size == size) {

		list_del_init(&parent->fl_entry);

		parent->free = 0;

		return parent;

	} else {

		child = drm_mm_split_at_start(parent, size, 1);

	}



	if (align_splitoff)

		drm_mm_put_block(align_splitoff);



	return child;

}

EXPORT_SYMBOL(drm_mm_get_block_atomic);

EXPORT_SYMBOL(drm_mm_get_block_generic);



/*

 * Put a block. Merge with the previous and / or next block if they are free.

include/drm/drm_mm.h

+15 −6
Original line number Diff line number Diff line
@@ -59,13 +59,22 @@ struct drm_mm { 
/*

 * Basic range manager support (drm_mm.c)

 */



extern struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,

extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,

						    unsigned long size,

					    unsigned alignment);

extern struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,

						    unsigned alignment,

						    int atomic);

static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,

						   unsigned long size,

						   unsigned alignment);

						   unsigned alignment)

{

	return drm_mm_get_block_generic(parent, size, alignment, 0);

}

static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,

							  unsigned long size,

							  unsigned alignment)

{

	return drm_mm_get_block_generic(parent, size, alignment, 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,

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