diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 88676083..06c64303 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -2362,25 +2362,27 @@ int drmFenceWait(int fd, drmFence *fence, unsigned flush_type,
     return 0;
 }    
 
-static unsigned long combine64(unsigned lo, unsigned hi)
+static unsigned long drmUL(drm_u64_t val)
 {
-    unsigned long ret = lo;
+    unsigned long ret = val.lo;
     if (sizeof(ret) == 8) {
 	int shift = 32;
-	ret |= (hi << shift);
+	ret |= (val.hi << shift);
     }
     return ret;
 }
 
-static void split32(unsigned long val, unsigned *lo, unsigned *hi)
+static drm_u64_t drmU64(unsigned long val)
 {
-    *lo = val & 0xFFFFFFFFUL;
+    drm_u64_t ret;
+    ret.lo = val & 0xFFFFFFFFUL;
     if (sizeof(val) == 8) {
 	int shift = 32;
-	*hi = val >> shift;
+	ret.hi = val >> shift;
     } else {
-	*hi = 0;
+	ret.hi = 0;
     }
+    return ret;
 }
 
 int drmTTMCreate(int fd, drmTTM *ttm, unsigned long size, unsigned flags)
@@ -2389,7 +2391,7 @@ int drmTTMCreate(int fd, drmTTM *ttm, unsigned long size, unsigned flags)
 
     arg.op = drm_ttm_create;
     arg.flags = flags;
-    split32((unsigned long) size, &arg.size_lo, &arg.size_hi);
+    arg.size = drmU64(size);
 
     if (ioctl(fd, DRM_IOCTL_TTM, &arg))
 	return -errno;
@@ -2397,7 +2399,7 @@ int drmTTMCreate(int fd, drmTTM *ttm, unsigned long size, unsigned flags)
     ttm->handle = arg.handle;
     ttm->user_token = (drm_handle_t) arg.user_token;
     ttm->flags = arg.flags;
-    ttm->size = combine64(arg.size_lo, arg.size_hi);
+    ttm->size = drmUL(arg.size);
     return 0;
 }
 
@@ -2424,7 +2426,7 @@ int drmTTMReference(int fd, unsigned handle, drmTTM *ttm)
     ttm->handle = arg.handle;
     ttm->user_token = (drm_handle_t) arg.user_token;
     ttm->flags = arg.flags;
-    ttm->size = combine64(arg.size_lo, arg.size_hi);
+    ttm->size = drmUL(arg.size);
     return 0;
 }
 
diff --git a/libdrm/xf86drm.h b/libdrm/xf86drm.h
index 433191b4..58cbd16c 100644
--- a/libdrm/xf86drm.h
+++ b/libdrm/xf86drm.h
@@ -497,6 +497,8 @@ do {	register unsigned int __old __asm("o0");		\
             }                                                          \
 	} while(0)
 
+
+
 /* General user-level programmer's API: unprivileged */
 extern int           drmAvailable(void);
 extern int           drmOpen(const char *name, const char *busid);
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 2997293b..81f08dfc 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -1359,26 +1359,29 @@ extern int drm_fence_ioctl(DRM_IOCTL_ARGS);
 extern int drm_bo_ioctl(DRM_IOCTL_ARGS);
 
 /*
- * Convenience 2*32-bit to 64-bit function
+ * Convenience drm_u64_t functions
  */
 
-static __inline__ unsigned long combine_64(uint32_t lo, uint32_t hi)
+static __inline__ unsigned long drm_ul(drm_u64_t val)
 {
-	unsigned long ret = lo;
+	unsigned long ret = val.lo;
 #if (BITS_PER_LONG == 64)
-		ret |= (hi << 32);
+		ret |= (val.hi << 32);
 #endif
 	return ret;
 }
 
-static __inline__ void split_32(unsigned long val, uint32_t *lo, uint32_t *hi)
+static __inline__ drm_u64_t drm_u64(unsigned long val)
 {
-	*lo = val & 0xFFFFFFFFUL;
+	drm_u64_t ret;
+
+	ret.lo = val & 0xFFFFFFFFUL;
 #if (BITS_PER_LONG == 64)
-	*hi = val >> 32;
+	ret.hi = val >> 32;
 #else 
-	*hi = 0;
+	ret.hi = 0;
 #endif
+	return ret;
 }
 
 
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c
index ad7b279e..e76b41fb 100644
--- a/linux-core/drm_ttm.c
+++ b/linux-core/drm_ttm.c
@@ -865,7 +865,7 @@ int drm_ttm_ioctl(DRM_IOCTL_ARGS)
 	switch(arg.op) {
 	case drm_ttm_create:
 		mutex_lock(&dev->struct_mutex);
-		size = combine_64(arg.size_lo, arg.size_hi);
+		size = drm_ul(arg.size);
 		ret = drm_ttm_object_create(dev, size, arg.flags, &entry);
 		if (ret) {
 			mutex_unlock(&dev->struct_mutex);
@@ -903,7 +903,7 @@ int drm_ttm_ioctl(DRM_IOCTL_ARGS)
 	}
 	arg.handle = entry->base.hash.key;
 	arg.user_token = entry->map_list.user_token;
-	split_32(entry->map_list.map->size, &arg.size_lo, &arg.size_hi);
+	arg.size = drm_u64(entry->map_list.map->size);
 	atomic_dec(&entry->usage);
 	mutex_unlock(&dev->struct_mutex);
 
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 726a5140..7133eb8f 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -630,6 +630,11 @@ typedef struct drm_set_version {
 	int drm_dd_minor;
 } drm_set_version_t;
 
+typedef struct drm_u64{
+	unsigned lo;
+	unsigned hi;
+}drm_u64_t;
+
 #define DRM_FENCE_FLAG_EMIT                0x00000001
 #define DRM_FENCE_FLAG_SHAREABLE           0x00000002
 #define DRM_FENCE_FLAG_WAIT_LAZY           0x00000004
@@ -655,6 +660,22 @@ typedef struct drm_fence_arg {
 	} op;
 } drm_fence_arg_t;
 
+#define DRM_TTM_FLAG_SHAREABLE           0x00000001
+
+typedef struct drm_ttm_arg {
+	enum {
+		drm_ttm_create,
+		drm_ttm_destroy,
+		drm_ttm_reference,
+		drm_ttm_unreference
+	} op;
+	unsigned handle;
+        unsigned user_token;
+	drm_u64_t size;
+        unsigned flags;
+}drm_ttm_arg_t;
+
+
 #define DRM_BO_FLAG_READ        0x00000001
 #define DRM_BO_FLAG_WRITE       0x00000002
 #define DRM_BO_FLAG_EXE         0x00000004
@@ -674,43 +695,12 @@ typedef struct drm_fence_arg {
 #define DRM_BO_HINT_AVOID_LOCAL 0x00000002
 #define DRM_BO_HINT_DONT_BLOCK  0x00000004
 
-/*
- * Multiplexing ioctl argument.
- */
-
-typedef struct drm_bo_arg {
-	unsigned num_requests;
-	enum {
-		drm_op_bo,
-		drm_op_ttm
-	} op;
-	unsigned data_lo;
-	unsigned data_hi;
-} drm_bo_arg_t;
-
-#define DRM_TTM_FLAG_SHAREABLE           0x00000001
-
-typedef struct drm_ttm_arg {
-	enum {
-		drm_ttm_create,
-		drm_ttm_destroy,
-		drm_ttm_reference,
-		drm_ttm_unreference
-	} op;
-	unsigned handle;
-        unsigned user_token;
-	unsigned size_lo;
-	unsigned size_hi;
-        unsigned flags;
-}drm_ttm_arg_t;
-
 
 typedef struct drm_bo_arg_request {
 	unsigned handle; /* User space handle */
 	unsigned mask;
 	unsigned hint;
-	unsigned size_lo;
-	unsigned size_hi;
+	drm_u64_t size;
 
 	enum {
 		drm_bo_type_ttm,
@@ -718,8 +708,8 @@ typedef struct drm_bo_arg_request {
 		drm_bo_type_user
 	}type;
 	unsigned arg_handle;
-	unsigned user_pointer_lo;
-	unsigned user_pointer_hi;
+	drm_u64_t user_pointer;
+	drm_u64_t next;
 	enum {
 		drm_bo_create,
 		drm_bo_validate,
@@ -733,21 +723,20 @@ typedef struct drm_bo_arg_request {
 
 typedef struct drm_bo_arg_reply {
 	int ret;
+	int handled;
 	unsigned handle;
 	unsigned flags;
-	unsigned size_lo;
-	unsigned size_hi;
-	unsigned offset_lo;
-	unsigned offset_hi;
+	drm_u64_t size;
+	drm_u64_t offset;
 	unsigned arg_handle;
 	unsigned map_flags;
 }drm_bo_arg_reply_t;
 	
 
-typedef union drm_bo_arg_data {
+typedef union drm_bo_arg{
 	drm_bo_arg_request_t req;
 	drm_bo_arg_reply_t rep;
-} drm_bo_arg_data_t;
+} drm_bo_arg_t;
 
 
 /**