[PATCH i-g-t 01/39] lib/drmtest: Add VKMS as a known driver type

["José Expósito" <jose.exposito89@gmail.com>]

As we are going to add VKMS specific tests, allow to check if it is
available.

Co-developed-by: Jim Shargo <jshargo@chromium.org>
Signed-off-by: Jim Shargo <jshargo@chromium.org>
Co-developed-by: Marius Vlad <marius.vlad@collabora.com>
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 lib/drmtest.c | 18 ++++++++++++++++++
 lib/drmtest.h |  8 ++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/drmtest.c b/lib/drmtest.c
index 436b6de78..2cc6e0c29 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -971,3 +971,21 @@ void igt_require_xe(int fd)
 {
 	igt_require(is_xe_device(fd));
 }
+
+void igt_require_vkms(void)
+{
+	/*
+	 * Since VKMS can create and destroy virtual drivers at will, instead
+	 * look to make sure the driver is installed.
+	 */
+	struct stat s = {};
+	int ret;
+	const char *vkms_module_dir = "/sys/module/vkms";
+
+	ret = stat(vkms_module_dir, &s);
+
+	igt_require_f(ret == 0, "VKMS stat of %s returned %d (%s)\n",
+		      vkms_module_dir, ret, strerror(ret));
+	igt_require_f(S_ISDIR(s.st_mode),
+		      "VKMS stat of %s was not a directory\n", vkms_module_dir);
+}
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 27e5a18e2..1b57e49ec 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -54,15 +54,18 @@ int __get_drm_device_name(int fd, char *name, int name_size);
 #define DRIVER_PANFROST	(1 << 5)
 #define DRIVER_MSM	(1 << 6)
 #define DRIVER_XE	(1 << 7)
-#define DRIVER_VMWGFX   (1 << 8)
+#define DRIVER_VKMS	(1 << 8)
+#define DRIVER_VMWGFX	(1 << 9)
 
 /*
  * Exclude DRVER_VGEM from DRIVER_ANY since if you run on a system
  * with vgem as well as a supported driver, you can end up with a
  * near-100% skip rate if you don't explicitly specify the device,
  * depending on device-load ordering.
+ *
+ * Exclude VKMS to prefer hardware drivers.
  */
-#define DRIVER_ANY 	~(DRIVER_VGEM)
+#define DRIVER_ANY	~(DRIVER_VGEM | DRIVER_VKMS)
 
 /*
  * Compile friendly enum for i915/xe.
@@ -135,6 +138,7 @@ void igt_require_i915(int fd);
 void igt_require_nouveau(int fd);
 void igt_require_vc4(int fd);
 void igt_require_xe(int fd);
+void igt_require_vkms(void);
 
 bool is_amdgpu_device(int fd);
 bool is_i915_device(int fd);
-- 
2.48.1