tests: add gem_unfence_active_buffers

Unfortunately this requires slab poisoning to catch anything :(

Also add a new helper to drmtest to get the available fence count.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 16 insertions, 0 deletions

diff --git a/lib/drmtest.c b/lib/drmtest.c
index ebc396f0..fc2f1a81 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -73,6 +73,21 @@ bool gem_uses_aliasing_ppgtt(int fd)
 	return val;
 }
 
+int gem_available_fences(int fd)
+{
+	struct drm_i915_getparam gp;
+	int val;
+
+	gp.param = I915_PARAM_NUM_FENCES_AVAIL;
+	gp.value = &val;
+
+	if (ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)))
+		return 0;
+
+	return val;
+}
+
+
 /* Ensure the gpu is idle by launching a nop execbuf and stalling for it. */
 void gem_quiescent_gpu(int fd)
 {
diff --git a/lib/drmtest.h b/lib/drmtest.h
index f4462a23..b0940f3a 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -57,6 +57,7 @@ int gem_madvise(int fd, uint32_t handle, int state);
 
 /* feature test helpers */
 bool gem_uses_aliasing_ppgtt(int fd);
+int gem_available_fences(int fd);
 
 /* generally useful helpers */
 void drmtest_fork_signal_helper(void);