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	i915_gem_object_lock(obj, NULL);
29	if (!i915_gem_object_has_struct_page(obj)) {
30		i915_gem_object_unlock(obj);
31		err = -EINVAL;
32		pr_err("shmem has no struct page\n");
33		goto out_obj;
34	}
35
36	err = i915_gem_object_attach_phys(obj, PAGE_SIZE);
37	i915_gem_object_unlock(obj);
38	if (err) {
39		pr_err("i915_gem_object_attach_phys failed, err=%d\n", err);
40		goto out_obj;
41	}
42
43	if (i915_gem_object_has_struct_page(obj)) {
44		pr_err("i915_gem_object_attach_phys did not create a phys object\n");
45		err = -EINVAL;
46		goto out_obj;
47	}
48
49	if (!atomic_read(&obj->mm.pages_pin_count)) {
50		pr_err("i915_gem_object_attach_phys did not pin its phys pages\n");
51		err = -EINVAL;
52		goto out_obj;
53	}
54
55	/* Make the object dirty so that put_pages must do copy back the data */
56	i915_gem_object_lock(obj, NULL);
57	err = i915_gem_object_set_to_gtt_domain(obj, true);
58	i915_gem_object_unlock(obj);
59	if (err) {
60		pr_err("i915_gem_object_set_to_gtt_domain failed with err=%d\n",
61		       err);
62		goto out_obj;
63	}
64
65out_obj:
66	i915_gem_object_put(obj);
67out:
68	return err;
69}
70
71int i915_gem_phys_mock_selftests(void)
72{
73	static const struct i915_subtest tests[] = {
74		SUBTEST(mock_phys_object),
75	};
76	struct drm_i915_private *i915;
77	int err;
78
79	i915 = mock_gem_device();
80	if (!i915)
81		return -ENOMEM;
82
83	err = i915_subtests(tests, i915);
84
85	mock_destroy_device(i915);
86	return err;
87}