2 files changed, 14 insertions, 0 deletions
diff --git a/lib/drmtest.c b/lib/drmtest.c
index d6e2540e..d526f38b 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -156,3 +156,16 @@ void gem_write(int fd, uint32_t handle, uint32_t offset, const void *buf, uint32
 	assert(ret == 0);
 }
 
+void gem_read(int fd, uint32_t handle, uint32_t offset, void *buf, uint32_t length)
+{
+	struct drm_i915_gem_pread gem_pread;
+	int ret;
+
+	gem_pread.handle = handle;
+	gem_pread.offset = offset;
+	gem_pread.size = length;
+	gem_pread.data_ptr = (uintptr_t)buf;
+	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_PREAD, &gem_pread);
+	assert(ret == 0);
+}
+
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 0e8e4757..299570fd 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -40,3 +40,4 @@ int drm_open_any_master(void);
 void gem_set_tiling(int fd, uint32_t handle, int tiling, int stride);
 void gem_close(int fd, uint32_t handle);
 void gem_write(int fd, uint32_t handle, uint32_t offset,  const void *buf, uint32_t size);
+void gem_read(int fd, uint32_t handle, uint32_t offset, void *buf, uint32_t size);