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 
11 static 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 
58 out_obj:
59 	i915_gem_object_put(obj);
60 out:
61 	return err;
62 }
63 
64 int 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 }
81