gallium: add sparse buffer interface and capability

v2:
- explain the resource_commit interface in more detail

Reviewed-by: Marek Olšák <[email protected]>

2 files changed, 15 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h
index a29fff514a6..4d5535b9fd6 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -585,6 +585,19 @@ struct pipe_context {
    void (*memory_barrier)(struct pipe_context *, unsigned flags);
 
    /**
+    * Change the commitment status of a part of the given resource, which must
+    * have been created with the PIPE_RESOURCE_FLAG_SPARSE bit.
+    *
+    * \param level The texture level whose commitment should be changed.
+    * \param box The region of the resource whose commitment should be changed.
+    * \param commit Whether memory should be committed or un-committed.
+    *
+    * \return false if out of memory, true on success.
+    */
+   bool (*resource_commit)(struct pipe_context *, struct pipe_resource *,
+                           unsigned level, struct pipe_box *box, bool commit);
+
+   /**
     * Creates a video codec for a specific video format/profile
     */
    struct pipe_video_codec *(*create_video_codec)( struct pipe_context *context,
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 39f66355c32..cd857ae65a7 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -459,6 +459,7 @@ enum pipe_flush_flags
 #define PIPE_RESOURCE_FLAG_MAP_PERSISTENT (1 << 0)
 #define PIPE_RESOURCE_FLAG_MAP_COHERENT   (1 << 1)
 #define PIPE_RESOURCE_FLAG_TEXTURING_MORE_LIKELY (1 << 2)
+#define PIPE_RESOURCE_FLAG_SPARSE                (1 << 3)
 #define PIPE_RESOURCE_FLAG_DRV_PRIV    (1 << 16) /* driver/winsys private */
 #define PIPE_RESOURCE_FLAG_ST_PRIV     (1 << 24) /* state-tracker/winsys private */
 
@@ -758,6 +759,7 @@ enum pipe_cap
    PIPE_CAP_TGSI_TEX_TXF_LZ,
    PIPE_CAP_TGSI_CLOCK,
    PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE,
+   PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)