pipebuffer, winsys: Add a size match parameter to the cached buffer manager

In some situations it's important to restrict the sizes of buffers that the
cached buffer manager is allowed to return

Signed-off-by: Thomas Hellstrom <[email protected]>
Cc: "10.1" <[email protected]>

2 files changed, 7 insertions, 3 deletions

diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h b/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h
index 2c88cf435c7..fe4c8c20071 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h
+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr.h
@@ -161,7 +161,8 @@ pb_slab_range_manager_create(struct pb_manager *provider,
  */
 struct pb_manager *
 pb_cache_manager_create(struct pb_manager *provider, 
-                     	unsigned usecs); 
+                     	unsigned usecs,
+			unsigned size_factor); 
 
 
 struct pb_fence_ops;
diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
index 9728bf4ee8b..6de5de04fe9 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
@@ -82,6 +82,7 @@ struct pb_cache_manager
    
    struct list_head delayed;
    pb_size numDelayed;
+   unsigned size_factor;
 };
 
 
@@ -231,7 +232,7 @@ pb_cache_is_buffer_compat(struct pb_cache_buffer *buf,
       return 0;
 
    /* be lenient with size */
-   if(buf->base.size >= 2*size)
+   if(buf->base.size > buf->mgr->size_factor*size)
       return 0;
    
    if(!pb_check_alignment(desc->alignment, buf->base.alignment))
@@ -387,7 +388,8 @@ pb_cache_manager_destroy(struct pb_manager *mgr)
 
 struct pb_manager *
 pb_cache_manager_create(struct pb_manager *provider, 
-                     	unsigned usecs) 
+                     	unsigned usecs,
+			unsigned size_factor) 
 {
    struct pb_cache_manager *mgr;
 
@@ -403,6 +405,7 @@ pb_cache_manager_create(struct pb_manager *provider,
    mgr->base.flush = pb_cache_manager_flush;
    mgr->provider = provider;
    mgr->usecs = usecs;
+   mgr->size_factor = size_factor;
    LIST_INITHEAD(&mgr->delayed);
    mgr->numDelayed = 0;
    pipe_mutex_init(mgr->mutex);