drm/ttm: add ioctl to get back memory managed area sized

taken from modesetting branch but could be useful outside it.

2 files changed, 16 insertions, 0 deletions

diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index fb8f1c66..3317ba5c 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -2871,6 +2871,21 @@ int drmMMUnlock(int fd, unsigned memType, int unlockBM)
     return drmIoctlTimeout(fd, DRM_IOCTL_MM_UNLOCK, &arg);
 }
 
+int drmMMInfo(int fd, unsigned memType, uint64_t *size)
+{
+    struct drm_mm_info_arg arg;
+
+    memset(&arg, 0, sizeof(arg));
+    
+    arg.mem_type = memType;
+
+    if (ioctl(fd, DRM_IOCTL_MM_INFO, &arg))
+	return -errno;
+
+    *size = arg.p_size;
+    return 0;
+}
+
 int drmBOVersion(int fd, unsigned int *major,
 		 unsigned int *minor,
 		 unsigned int *patchlevel)
diff --git a/libdrm/xf86mm.h b/libdrm/xf86mm.h
index c80288a7..bb573407 100644
--- a/libdrm/xf86mm.h
+++ b/libdrm/xf86mm.h
@@ -172,6 +172,7 @@ extern int drmMMInit(int fd, unsigned long pOffset, unsigned long pSize,
 extern int drmMMTakedown(int fd, unsigned memType);
 extern int drmMMLock(int fd, unsigned memType, int lockBM, int ignoreNoEvict);
 extern int drmMMUnlock(int fd, unsigned memType, int unlockBM);
+extern int drmMMInfo(int fd, unsigned memType, uint64_t *size);
 extern int drmBOSetStatus(int fd, drmBO *buf, 
 			  uint64_t flags, uint64_t mask,
 			  unsigned int hint,