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
mock_phys_object(void * arg)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 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
65 out_obj:
66 i915_gem_object_put(obj);
67 out:
68 return err;
69 }
70
i915_gem_phys_mock_selftests(void)71 int 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 }
88