Test for TTM presence initially rather than test for lack of classic aperture.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/common/dri_bufmgr_ttm.c b/src/mesa/drivers/dri/common/dri_bufmgr_ttm.c
index a721a7ce5c..508d4f5053 100644
--- a/src/mesa/drivers/dri/common/dri_bufmgr_ttm.c
+++ b/src/mesa/drivers/dri/common/dri_bufmgr_ttm.c
@@ -353,6 +353,7 @@ dri_bufmgr_ttm_init(int fd, unsigned int fence_type,
 		    unsigned int fence_type_flush)
 {
    dri_bufmgr_ttm *bufmgr_ttm;
+   dri_bo *test_alloc;
 
    bufmgr_ttm = malloc(sizeof(*bufmgr_ttm));
    bufmgr_ttm->fd = fd;
@@ -372,5 +373,17 @@ dri_bufmgr_ttm_init(int fd, unsigned int fence_type,
    bufmgr_ttm->bufmgr.fence_unreference = dri_ttm_fence_unreference;
    bufmgr_ttm->bufmgr.fence_wait = dri_ttm_fence_wait;
 
+   /* Attempt an allocation to make sure that the DRM was actually set up for
+    * TTM.
+    */
+   test_alloc = dri_bo_alloc((dri_bufmgr *)bufmgr_ttm, "test allocation",
+     4096, 4096, DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_MEM_TT);
+   if (test_alloc == NULL) {
+      _glthread_DESTROY_MUTEX(bufmgr_ttm->mutex);
+      free(bufmgr_ttm);
+      return NULL;
+   }
+   dri_bo_unreference(test_alloc);
+
    return &bufmgr_ttm->bufmgr;
 }