igt/gem_create: Test to validate parameters for GEM_CREATE ioctl

This test validates the two parameters (size and flags) GEM_CREATE ioctl.

v2: Added IGT_TEST_DESCRIPTION (Thomas Wood)

v3: Removed use of hard coded values, updated comments (Tvrtko)

v4: Removed over-use of macros, updated with multiples of PAGE_SIZE (Tvrtko)

Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>

tests/Makefile.sources

@@ -15,6 +15,7 @@ TESTS_progs_M = \
 	gem_close_race \
 	gem_concurrent_blit \
 	gem_concurrent_all \
+	gem_create \
 	gem_cs_tlb \
 	gem_ctx_param_basic \
 	gem_ctx_bad_exec \

tests/gem_create.c

@@ -0,0 +1,166 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * 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.
+ *
+ * Authors:
+ *    Ankitprasad Sharma <ankitprasad.r.sharma at intel.com>
+ *
+ */
+
+/** @file gem_create.c
+ *
+ * This is a test for the extended and old gem_create ioctl, that
+ * includes allocation of object from stolen memory and shmem.
+ *
+ * The goal is to simply ensure that basics work and invalid input
+ * combinations are rejected.
+ */
+
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <getopt.h>
+
+#include <drm.h>
+
+#include "ioctl_wrappers.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_io.h"
+#include "intel_chipset.h"
+#include "igt_aux.h"
+#include "drmtest.h"
+#include "drm.h"
+#include "i915_drm.h"
+
+IGT_TEST_DESCRIPTION("This is a test for the extended & old gem_create ioctl,"
+		     " that includes allocation of object from stolen memory"
+		     " and shmem.");
+
+#define CLEAR(s) memset(&s, 0, sizeof(s))
+#define PAGE_SIZE 4096
+
+struct local_i915_gem_create_v2 {
+	uint64_t size;
+	uint32_t handle;
+	uint32_t pad;
+#define I915_CREATE_PLACEMENT_STOLEN (1<<0)
+	uint32_t flags;
+} create;
+
+#define LOCAL_IOCTL_I915_GEM_CREATE       DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_CREATE, struct local_i915_gem_create_v2)
+
+static void invalid_flag_test(int fd)
+{
+	int ret;
+
+	gem_require_stolen_support(fd);
+
+	create.handle = 0;
+	create.size = PAGE_SIZE;
+	create.flags = ~I915_CREATE_PLACEMENT_STOLEN;
+	ret = drmIoctl(fd, LOCAL_IOCTL_I915_GEM_CREATE, &create);
+
+	igt_assert(ret <= 0);
+
+	create.flags = ~0;
+	ret = drmIoctl(fd, LOCAL_IOCTL_I915_GEM_CREATE, &create);
+
+	igt_assert(ret <= 0);
+}
+
+static void invalid_size_test(int fd)
+{
+	int handle;
+
+	handle = __gem_create(fd, 0);
+	igt_assert(!handle);
+}
+
+/*
+ * Creating an object with non-aligned size and trying to access it with an
+ * offset, which is greater than the requested size but smaller than the
+ * object's last page boundary. pwrite here must be successful.
+ */
+static void valid_nonaligned_size(int fd)
+{
+	int handle;
+	char buf[PAGE_SIZE];
+
+	handle = gem_create(fd, PAGE_SIZE / 2);
+
+	gem_write(fd, handle, PAGE_SIZE / 2, buf, PAGE_SIZE / 2);
+
+	gem_close(fd, handle);
+}
+
+/*
+ * Creating an object with non-aligned size and trying to access it with an
+ * offset, which is greater than the requested size and larger than the
+ * object's last page boundary. pwrite here must fail.
+ */
+static void invalid_nonaligned_size(int fd)
+{
+	int handle;
+	char buf[PAGE_SIZE];
+	struct drm_i915_gem_pwrite gem_pwrite;
+
+	handle = gem_create(fd, PAGE_SIZE / 2);
+
+	CLEAR(gem_pwrite);
+	gem_pwrite.handle = handle;
+	gem_pwrite.offset = PAGE_SIZE / 2;
+	gem_pwrite.size = PAGE_SIZE;
+	gem_pwrite.data_ptr = (uintptr_t)buf;
+	/* This should fail. Hence cannot use gem_write. */
+	igt_assert(drmIoctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &gem_pwrite));
+
+	gem_close(fd, handle);
+}
+
+igt_main
+{
+	int fd = -1;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		fd = drm_open_any();
+	}
+
+	igt_subtest("stolen-invalid-flag")
+		invalid_flag_test(fd);
+
+	igt_subtest("create-invalid-size")
+		invalid_size_test(fd);
+
+	igt_subtest("create-valid-nonaligned")
+		valid_nonaligned_size(fd);
+
+	igt_subtest("create-invalid-nonaligned")
+		invalid_nonaligned_size(fd);
+}