1/*
 2 * SPDX-License-Identifier: MIT
 3 *
 4 * Copyright © 2016 Intel Corporation
 5 */
 6
 7#include "i915_selftest.h"
 8
 9#include "selftests/mock_gem_device.h"
10
11static int mock_phys_object(void *arg)
12{
13	struct drm_i915_private *i915 = arg;
14	struct drm_i915_gem_object *obj;
15	int err;
16
17	/* Create an object and bind it to a contiguous set of physical pages,
18	 * i.e. exercise the i915_gem_object_phys API.
19	 */
20
21	obj = i915_gem_object_create_shmem(i915, PAGE_SIZE);
22	if (IS_ERR(obj)) {
23		err = PTR_ERR(obj);
24		pr_err("i915_gem_object_create failed, err=%d\n", err);
25		goto out;
26	}
27
28	mutex_lock(&i915->drm.struct_mutex);
29	err = i915_gem_object_attach_phys(obj, PAGE_SIZE);
30	mutex_unlock(&i915->drm.struct_mutex);
31	if (err) {
32		pr_err("i915_gem_object_attach_phys failed, err=%d\n", err);
33		goto out_obj;
34	}
35
36	if (obj->ops != &i915_gem_phys_ops) {
37		pr_err("i915_gem_object_attach_phys did not create a phys object\n");
38		err = -EINVAL;
39		goto out_obj;
40	}
41
42	if (!atomic_read(&obj->mm.pages_pin_count)) {
43		pr_err("i915_gem_object_attach_phys did not pin its phys pages\n");
44		err = -EINVAL;
45		goto out_obj;
46	}
47
48	/* Make the object dirty so that put_pages must do copy back the data */
49	i915_gem_object_lock(obj);
50	err = i915_gem_object_set_to_gtt_domain(obj, true);
51	i915_gem_object_unlock(obj);
52	if (err) {
53		pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n",
54		       err);
55		goto out_obj;
56	}
57
58out_obj:
59	i915_gem_object_put(obj);
60out:
61	return err;
62}
63
64int i915_gem_phys_mock_selftests(void)
65{
66	static const struct i915_subtest tests[] = {
67		SUBTEST(mock_phys_object),
68	};
69	struct drm_i915_private *i915;
70	int err;
71
72	i915 = mock_gem_device();
73	if (!i915)
74		return -ENOMEM;
75
76	err = i915_subtests(tests, i915);
77
78	drm_dev_put(&i915->drm);
79	return err;
80}