gallium/radeon: clean up pb_cache bucket/usage determination

Reviewed-by: Nicolai Hähnle <[email protected]>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index 4ecd73f01dc..239b6ab9a67 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -665,6 +665,7 @@ enum radeon_heap {
     RADEON_HEAP_GTT_WC,
     RADEON_HEAP_GTT,
     RADEON_MAX_SLAB_HEAPS,
+    RADEON_MAX_CACHED_HEAPS = RADEON_MAX_SLAB_HEAPS,
 };
 
 static inline enum radeon_bo_domain radeon_domain_from_heap(enum radeon_heap heap)
@@ -699,6 +700,25 @@ static inline unsigned radeon_flags_from_heap(enum radeon_heap heap)
     }
 }
 
+/* The pb cache bucket is chosen to minimize pb_cache misses.
+ * It must be between 0 and 3 inclusive.
+ */
+static inline unsigned radeon_get_pb_cache_bucket_index(enum radeon_heap heap)
+{
+    switch (heap) {
+    case RADEON_HEAP_VRAM_NO_CPU_ACCESS:
+        return 0;
+    case RADEON_HEAP_VRAM:
+    case RADEON_HEAP_VRAM_GTT:
+        return 1;
+    case RADEON_HEAP_GTT_WC:
+        return 2;
+    case RADEON_HEAP_GTT:
+    default:
+        return 3;
+    }
+}
+
 /* Return the heap index for winsys allocators, or -1 on failure. */
 static inline int radeon_get_heap_index(enum radeon_bo_domain domain,
                                         enum radeon_bo_flag flags)