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

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index 5ebdd6f8f36e6bc8d67e99a54bac3856d45ac9eb..f999568d69c10da7721c49bdf9e92889dc6b7113 100644 (file)
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -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))

diff --git a/include/drm/drm_buddy.h b/include/drm/drm_buddy.h
index a5b39fc01003a6746047639afb12b2e8f33c56a8..19ed661a32f3bd19f2b74ba3b7b5eef6d94e37ed 100644 (file)
--- a/include/drm/drm_buddy.h
+++ b/include/drm/drm_buddy.h
@@ -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;