igt/vc4_create_bo: Test various paths in BO creation.

create-bo-0 fails on the current kernel, and it's something I want to
fix.

v2: Use do_ioctl_err().

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>

tests/Makefile.am

@@ -101,6 +101,8 @@ prime_nv_api_CFLAGS = $(AM_CFLAGS) $(DRM_NOUVEAU_CFLAGS)
 prime_nv_api_LDADD = $(LDADD) $(DRM_NOUVEAU_LIBS)
 prime_nv_pcopy_CFLAGS = $(AM_CFLAGS) $(DRM_NOUVEAU_CFLAGS)
 prime_nv_pcopy_LDADD = $(LDADD) $(DRM_NOUVEAU_LIBS)
+vc4_create_bo_CFLAGS = $(AM_CFLAGS) $(DRM_VC4_CFLAGS)
+vc4_create_bo_LDADD = $(LDADD) $(DRM_VC4_LIBS)
 vc4_wait_bo_CFLAGS = $(AM_CFLAGS) $(DRM_VC4_CFLAGS)
 vc4_wait_bo_LDADD = $(LDADD) $(DRM_VC4_LIBS)
 vc4_wait_seqno_CFLAGS = $(AM_CFLAGS) $(DRM_VC4_CFLAGS)

tests/Makefile.sources

@@ -5,6 +5,7 @@ NOUVEAU_TESTS_M = \
 	$(NULL)
 
 VC4_TESTS_M = \
+	vc4_create_bo \
 	vc4_wait_bo \
 	vc4_wait_seqno \
 	$(NULL)

tests/vc4_create_bo.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2016 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "igt.h"
+#include "igt_vc4.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "vc4_drm.h"
+
+igt_main
+{
+	int fd;
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_VC4);
+	}
+
+	igt_subtest("create-bo-4096") {
+		int handle = igt_vc4_create_bo(fd, 4096);
+		gem_close(fd, handle);
+	}
+
+	igt_subtest("create-bo-0") {
+		struct drm_vc4_create_bo arg = {
+			.size = 0,
+		};
+		do_ioctl_err(fd, DRM_IOCTL_VC4_CREATE_BO, &arg, EINVAL);
+	}
+
+	igt_subtest("create-bo-zeroed") {
+		int fd2 = drm_open_driver(DRIVER_VC4);
+		int handle;
+		uint32_t *map;
+		/* A size different from any used in our other tests, to try
+		 * to convince it to land as the only one of its size in the
+		 * kernel BO cache
+		 */
+		size_t size = 3 * 4096, i;
+
+		/* Make a BO and free it on our main fd. */
+		handle = igt_vc4_create_bo(fd, size);
+		map = igt_vc4_mmap_bo(fd, handle, size, PROT_READ | PROT_WRITE);
+		memset(map, 0xd0, size);
+		munmap(map, size);
+		gem_close(fd, handle);
+
+		/* Now, allocate a BO on the other fd and make sure it doesn't
+		 * have the old contents.
+		 */
+		handle = igt_vc4_create_bo(fd2, size);
+		map = igt_vc4_mmap_bo(fd2, handle, size, PROT_READ | PROT_WRITE);
+		for (i = 0; i < size / 4; i++)
+			igt_assert_eq_u32(map[i], 0x0);
+		munmap(map, size);
+		gem_close(fd2, handle);
+
+		close(fd2);
+	}
+
+	igt_fixture
+		close(fd);
+}