[PATCH 4/5] drm/ttm: Add TTM_PL_FLAG_BOTTOMUP

["Michel Dänzer" <michel@daenzer.net>]

From: Michel Dänzer <michel.daenzer@amd.com>

For placing a BO strictly from the bottom up, i.e. in the lowest hole which
can hold it.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo_manager.c | 5 +++++
 include/drm/ttm/ttm_placement.h      | 5 ++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c
index aa0bd05..a64397b 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -73,6 +73,11 @@ static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
 		aflags = DRM_MM_CREATE_TOP;
 	}
 
+	if (place->flags & TTM_PL_FLAG_BOTTOMUP) {
+		sflags = DRM_MM_SEARCH_DEFAULT;
+		aflags = DRM_MM_CREATE_DEFAULT;
+	}
+
 	spin_lock(&rman->lock);
 	ret = drm_mm_insert_node_in_range_generic(mm, node, mem->num_pages,
 					  mem->page_alignment, 0,
diff --git a/include/drm/ttm/ttm_placement.h b/include/drm/ttm/ttm_placement.h
index 8ed44f9..c9ae86a 100644
--- a/include/drm/ttm/ttm_placement.h
+++ b/include/drm/ttm/ttm_placement.h
@@ -66,7 +66,9 @@
  * TTM_PL_FLAG_NO_EVICT means that the buffer may never
  * be evicted to make room for other buffers.
  * TTM_PL_FLAG_TOPDOWN requests to be placed from the
- * top of the memory area, instead of the bottom.
+ * top of the memory area.
+ * TTM_PL_FLAG_BOTTOMUP requests to be placed from the
+ * bottom of the memory area.
  */
 
 #define TTM_PL_FLAG_CACHED      (1 << 16)
@@ -75,6 +77,7 @@
 #define TTM_PL_FLAG_SHARED      (1 << 20)
 #define TTM_PL_FLAG_NO_EVICT    (1 << 21)
 #define TTM_PL_FLAG_TOPDOWN     (1 << 22)
+#define TTM_PL_FLAG_BOTTOMUP    (1 << 23)
 
 #define TTM_PL_MASK_CACHING     (TTM_PL_FLAG_CACHED | \
 				 TTM_PL_FLAG_UNCACHED | \
-- 
2.1.1

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