Implement mm_lock and mm_unlock functions.

The mm_lock function is used when leaving vt. It evicts _all_ buffers.
Buffers with the DRM_BO_NO_MOVE attribute set will be guaranteed to
get the same offset when / if they are rebound.

2 files changed, 35 insertions, 1 deletions

diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index 039c9b32..253ba690 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -3202,4 +3202,37 @@ int drmMMMaxLockedSize(int fd, unsigned long maxLockedSize)
     return 0;	
 }
 
+int drmMMLock(int fd, unsigned memType)
+{
+    drm_mm_init_arg_t arg;
+    int ret;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.req.op = mm_lock;
+    arg.req.mem_type = memType;
+
+    do{
+	ret = ioctl(fd, DRM_IOCTL_MM_INIT, &arg);
+    } while (ret && errno == EAGAIN);
+    
+    return ret;	
+}
+
+int drmMMUnlock(int fd, unsigned memType)
+{
+    drm_mm_init_arg_t arg;
+    int ret;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.req.op = mm_unlock;
+    arg.req.mem_type = memType;
+
+    do{
+	ret = ioctl(fd, DRM_IOCTL_MM_INIT, &arg);
+    } while (ret && errno == EAGAIN);
+    
+    return ret;	
+}
+
+
 #endif
diff --git a/libdrm/xf86mm.h b/libdrm/xf86mm.h
index b2ba24d5..c3112c90 100644
--- a/libdrm/xf86mm.h
+++ b/libdrm/xf86mm.h
@@ -199,7 +199,8 @@ extern int drmMMInit(int fd, unsigned long pOffset, unsigned long pSize,
 		     unsigned memType);
 extern int drmMMTakedown(int fd, unsigned memType);
 extern int drmMMMaxLockedSize(int fd, unsigned long maxLockedSize);
-
+extern int drmMMLock(int fd, unsigned memType);
+extern int drmMMUnlock(int fd, unsigned memType);
 
 
 #endif