diff --git a/libdrm/radeon/radeon_bo.h b/libdrm/radeon/radeon_bo.h
index 09ad068..1e2e6c2 100644
--- a/libdrm/radeon/radeon_bo.h
+++ b/libdrm/radeon/radeon_bo.h
@@ -73,6 +73,7 @@ struct radeon_bo_funcs {
 			  uint32_t pitch);
     int (*bo_get_tiling)(struct radeon_bo *bo, uint32_t *tiling_flags,
 			  uint32_t *pitch);
+    int (*bo_is_busy)(struct radeon_bo *bo, uint32_t *domain);
 };
 
 struct radeon_bo_manager {
@@ -166,6 +167,15 @@ static inline int _radeon_bo_wait(struct radeon_bo *bo,
     return bo->bom->funcs->bo_wait(bo);
 }
 
+static inline int _radeon_bo_is_busy(struct radeon_bo *bo,
+				     uint32_t *domain,
+                                     const char *file,
+                                     const char *func,
+                                     int line)
+{
+    return bo->bom->funcs->bo_is_busy(bo, domain);
+}
+
 static inline int radeon_bo_set_tiling(struct radeon_bo *bo,
 				       uint32_t tiling_flags, uint32_t pitch)
 {
@@ -199,5 +209,7 @@ static inline int radeon_bo_is_static(struct radeon_bo *bo)
     _radeon_bo_debug(bo, opcode, __FILE__, __FUNCTION__, __LINE__)
 #define radeon_bo_wait(bo) \
     _radeon_bo_wait(bo, __FILE__, __func__, __LINE__)
+#define radeon_bo_is_busy(bo, domain) \
+    _radeon_bo_is_busy(bo, domain, __FILE__, __func__, __LINE__)
 
 #endif
diff --git a/libdrm/radeon/radeon_bo_gem.c b/libdrm/radeon/radeon_bo_gem.c
index cf59a35..76d80e7 100644
--- a/libdrm/radeon/radeon_bo_gem.c
+++ b/libdrm/radeon/radeon_bo_gem.c
@@ -209,6 +209,21 @@ static int bo_wait(struct radeon_bo *bo)
     return ret;
 }
 
+static int bo_is_busy(struct radeon_bo *bo, uint32_t *domain)
+{
+    struct drm_radeon_gem_busy args;
+    int ret;
+
+    args.handle = bo->handle;
+    args.domain = 0;
+
+    ret = drmCommandWriteRead(bo->bom->fd, DRM_RADEON_GEM_BUSY,
+	    &args, sizeof(args));
+
+    *domain = args.domain;
+    return ret;
+}
+
 static int bo_set_tiling(struct radeon_bo *bo, uint32_t tiling_flags,
 				 uint32_t pitch)
 {
@@ -257,6 +272,7 @@ static struct radeon_bo_funcs bo_gem_funcs = {
     NULL,
     bo_set_tiling,
     bo_get_tiling,
+    bo_is_busy,
 };
 
 struct radeon_bo_manager *radeon_bo_manager_gem_ctor(int fd)
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 42a6c23..d97844f 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -795,7 +795,6 @@ struct drm_gem_open {
 #define DRM_IOCTL_MODE_GETFB		DRM_IOWR(0xAD, struct drm_mode_fb_cmd)
 #define DRM_IOCTL_MODE_ADDFB		DRM_IOWR(0xAE, struct drm_mode_fb_cmd)
 #define DRM_IOCTL_MODE_RMFB		DRM_IOWR(0xAF, uint32_t)
-#define DRM_IOCTL_MODE_REPLACEFB	DRM_IOWR(0xB0, struct drm_mode_fb_cmd)
 
 /*@}*/
 
diff --git a/shared-core/radeon_drm.h b/shared-core/radeon_drm.h
index 3745ac5..47f1952 100644
--- a/shared-core/radeon_drm.h
+++ b/shared-core/radeon_drm.h
@@ -505,6 +505,7 @@ typedef struct {
 #define DRM_RADEON_INFO			0x27
 #define DRM_RADEON_GEM_SET_TILING	0x28
 #define DRM_RADEON_GEM_GET_TILING	0x29
+#define DRM_RADEON_GEM_BUSY		0x2a
 
 #define DRM_IOCTL_RADEON_CP_INIT    DRM_IOW( DRM_COMMAND_BASE + DRM_RADEON_CP_INIT, drm_radeon_init_t)
 #define DRM_IOCTL_RADEON_CP_START   DRM_IO(  DRM_COMMAND_BASE + DRM_RADEON_CP_START)
@@ -545,6 +546,7 @@ typedef struct {
 #define DRM_IOCTL_RADEON_INFO		DRM_IOWR(DRM_COMMAND_BASE + DRM_RADEON_INFO, struct drm_radeon_info)
 #define DRM_IOCTL_RADEON_SET_TILING	DRM_IOWR(DRM_COMMAND_BASE + DRM_RADEON_GEM_SET_TILING, struct drm_radeon_gem_set_tiling)
 #define DRM_IOCTL_RADEON_GET_TILING	DRM_IOWR(DRM_COMMAND_BASE + DRM_RADEON_GEM_GET_TILING, struct drm_radeon_gem_get_tiling)
+#define DRM_IOCTL_RADEON_GEM_BUSY  DRM_IOWR(DRM_COMMAND_BASE + DRM_RADEON_GEM_BUSY, struct drm_radeon_gem_busy)
 
 typedef struct drm_radeon_init {
 	enum {
@@ -704,6 +706,7 @@ typedef struct drm_radeon_indirect {
 #define RADEON_PARAM_FB_LOCATION           14   /* FB location */
 #define RADEON_PARAM_NUM_GB_PIPES          15   /* num GB pipes */
 #define RADEON_PARAM_DEVICE_ID             16
+#define RADEON_PARAM_NUM_Z_PIPES           17   /* num Z pipes */
 
 typedef struct drm_radeon_getparam {
 	int param;
@@ -835,7 +838,7 @@ struct drm_radeon_gem_wait_idle {
 
 struct drm_radeon_gem_busy {
 	uint32_t	handle;
-	uint32_t	busy;
+	uint32_t	domain;
 };
 
 struct drm_radeon_gem_pread {
@@ -892,6 +895,7 @@ struct drm_radeon_cs {
 
 #define RADEON_INFO_DEVICE_ID		0x00
 #define RADEON_INFO_NUM_GB_PIPES	0x01
+#define RADEON_INFO_NUM_Z_PIPES 	0x02
 
 struct drm_radeon_info {
 	uint32_t		request;