Commit 117bbc0e authored by Matthew Auld's avatar Matthew Auld Committed by Christian König
Browse files

drm/buddy: stop using PAGE_SIZE 



The drm_buddy minimum page-size requirements should be distinct from the
CPU PAGE_SIZE. Only restriction is that the minimum page-size is at
least 4K.

Signed-off-by: default avatarMatthew Auld <matthew.auld@intel.com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: default avatarArunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229105112.250077-3-matthew.auld@intel.com


Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
parent aed9a1a4

drivers/gpu/drm/drm_buddy.c

+1 −1
Original line number Diff line number Diff line
@@ -102,7 +102,7 @@ int drm_buddy_init(struct drm_buddy *mm, u64 size, u64 chunk_size) 
	if (size < chunk_size)

		return -EINVAL;



	if (chunk_size < PAGE_SIZE)

	if (chunk_size < SZ_4K)

		return -EINVAL;



	if (!is_power_of_2(chunk_size))

include/drm/drm_buddy.h

+3 −3
Original line number Diff line number Diff line
@@ -53,8 +53,8 @@ struct drm_buddy_block { 
	struct list_head tmp_link;

};



/* Order-zero must be at least PAGE_SIZE */

#define DRM_BUDDY_MAX_ORDER (63 - PAGE_SHIFT)

/* Order-zero must be at least SZ_4K */

#define DRM_BUDDY_MAX_ORDER (63 - 12)



/*

 * Binary Buddy System.
@@ -82,7 +82,7 @@ struct drm_buddy { 
	unsigned int n_roots;

	unsigned int max_order;



	/* Must be at least PAGE_SIZE */

	/* Must be at least SZ_4K */

	u64 chunk_size;

	u64 size;

	u64 avail;