1 // SPDX-License-Identifier: MIT
2 /*
3  * Copyright © 2018 Intel Corporation
4  */
5 
6 #include "i915_selftest.h"
7 #include "selftests/igt_reset.h"
8 #include "selftests/igt_atomic.h"
9 
10 static int igt_global_reset(void *arg)
11 {
12 	struct drm_i915_private *i915 = arg;
13 	unsigned int reset_count;
14 	int err = 0;
15 
16 	/* Check that we can issue a global GPU reset */
17 
18 	igt_global_reset_lock(i915);
19 
20 	reset_count = i915_reset_count(&i915->gpu_error);
21 
22 	i915_reset(i915, ALL_ENGINES, NULL);
23 
24 	if (i915_reset_count(&i915->gpu_error) == reset_count) {
25 		pr_err("No GPU reset recorded!\n");
26 		err = -EINVAL;
27 	}
28 
29 	igt_global_reset_unlock(i915);
30 
31 	if (i915_reset_failed(i915))
32 		err = -EIO;
33 
34 	return err;
35 }
36 
37 static int igt_wedged_reset(void *arg)
38 {
39 	struct drm_i915_private *i915 = arg;
40 	intel_wakeref_t wakeref;
41 
42 	/* Check that we can recover a wedged device with a GPU reset */
43 
44 	igt_global_reset_lock(i915);
45 	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
46 
47 	i915_gem_set_wedged(i915);
48 
49 	GEM_BUG_ON(!i915_reset_failed(i915));
50 	i915_reset(i915, ALL_ENGINES, NULL);
51 
52 	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
53 	igt_global_reset_unlock(i915);
54 
55 	return i915_reset_failed(i915) ? -EIO : 0;
56 }
57 
58 static int igt_atomic_reset(void *arg)
59 {
60 	struct drm_i915_private *i915 = arg;
61 	const typeof(*igt_atomic_phases) *p;
62 	int err = 0;
63 
64 	/* Check that the resets are usable from atomic context */
65 
66 	igt_global_reset_lock(i915);
67 	mutex_lock(&i915->drm.struct_mutex);
68 
69 	/* Flush any requests before we get started and check basics */
70 	if (!igt_force_reset(i915))
71 		goto unlock;
72 
73 	for (p = igt_atomic_phases; p->name; p++) {
74 		intel_engine_mask_t awake;
75 
76 		GEM_TRACE("intel_gpu_reset under %s\n", p->name);
77 
78 		awake = reset_prepare(i915);
79 		p->critical_section_begin();
80 		reset_prepare(i915);
81 		err = intel_gpu_reset(i915, ALL_ENGINES);
82 		p->critical_section_end();
83 		reset_finish(i915, awake);
84 
85 		if (err) {
86 			pr_err("intel_gpu_reset failed under %s\n", p->name);
87 			break;
88 		}
89 	}
90 
91 	/* As we poke around the guts, do a full reset before continuing. */
92 	igt_force_reset(i915);
93 
94 unlock:
95 	mutex_unlock(&i915->drm.struct_mutex);
96 	igt_global_reset_unlock(i915);
97 
98 	return err;
99 }
100 
101 int intel_reset_live_selftests(struct drm_i915_private *i915)
102 {
103 	static const struct i915_subtest tests[] = {
104 		SUBTEST(igt_global_reset), /* attempt to recover GPU first */
105 		SUBTEST(igt_wedged_reset),
106 		SUBTEST(igt_atomic_reset),
107 	};
108 	intel_wakeref_t wakeref;
109 	int err = 0;
110 
111 	if (!intel_has_gpu_reset(i915))
112 		return 0;
113 
114 	if (i915_terminally_wedged(i915))
115 		return -EIO; /* we're long past hope of a successful reset */
116 
117 	with_intel_runtime_pm(&i915->runtime_pm, wakeref)
118 		err = i915_subtests(tests, i915);
119 
120 	return err;
121 }
122