winsys/svga/drm: Create winsys interface for Fence FD

The new interfaces will be used to enable
EGL_ANDROID_native_fence_sync.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>

diff --git a/src/gallium/drivers/svga/svga_winsys.h b/src/gallium/drivers/svga/svga_winsys.h
index c785b4f748a0c21b722247fb3664442e6cd2ec75..e74d1ca4d72b679c6519e91b973e55101f85f20b 100644 (file)
--- a/src/gallium/drivers/svga/svga_winsys.h
+++ b/src/gallium/drivers/svga/svga_winsys.h
@@ -86,7 +86,8 @@ struct winsys_handle;
 #define SVGA_QUERY_FLAG_SET        (1 << 0)
 #define SVGA_QUERY_FLAG_REF        (1 << 1)
 
-#define SVGA_HINT_FLAG_CAN_PRE_FLUSH (1 << 0)  /* Can preemptively flush */
+#define SVGA_HINT_FLAG_CAN_PRE_FLUSH   (1 << 0)  /* Can preemptively flush */
+#define SVGA_HINT_FLAG_EXPORT_FENCE_FD (1 << 1)  /* Export a Fence FD */
 
 /**
  * SVGA mks statistics info
@@ -373,6 +374,11 @@ struct svga_winsys_context
     */
    uint32 hints;
 
+   /**
+    * File descriptor for imported fence
+    */
+   int32 imported_fence_fd;
+
    /**
     ** BEGIN new functions for guest-backed surfaces.
     **/
@@ -635,6 +641,31 @@ struct svga_winsys_screen
                         uint64_t timeout,
                         unsigned flag );
 
+   /**
+    * Get the file descriptor associated with the fence
+    * \param duplicate duplicate the fd before returning it
+    * \return zero on success.
+    */
+   int (*fence_get_fd)( struct svga_winsys_screen *sws,
+                        struct pipe_fence_handle *fence,
+                        boolean duplicate );
+
+   /**
+    * Create a fence using the given file descriptor
+    * \return zero on success.
+    */
+   void (*fence_create_fd)( struct svga_winsys_screen *sws,
+                            struct pipe_fence_handle **fence,
+                            int32_t fd );
+
+   /**
+    * Accumulates fence FD from other devices into the current context
+    * \param context_fd FD the context will be waiting on
+    * \return zero on success
+    */
+   int (*fence_server_sync)( struct svga_winsys_screen *sws,
+                             int32_t *context_fd,
+                             struct pipe_fence_handle *fence );
 
    /**
     ** BEGIN new functions for guest-backed surfaces.
@@ -726,6 +757,7 @@ struct svga_winsys_screen
    boolean have_generate_mipmap_cmd;
    boolean have_set_predication_cmd;
    boolean have_transfer_from_buffer_cmd;
+   boolean have_fence_fd;
 };