1// SPDX-License-Identifier: MIT
2/*
3 * Copyright �� 2022 Intel Corporation
4 */
5
6#include "gt/intel_gt_print.h"
7#include "selftests/igt_spinner.h"
8#include "selftests/igt_reset.h"
9#include "selftests/intel_scheduler_helpers.h"
10#include "gt/intel_engine_heartbeat.h"
11#include "gem/selftests/mock_context.h"
12
13#define BEAT_INTERVAL	100
14
15static struct i915_request *nop_request(struct intel_engine_cs *engine)
16{
17	struct i915_request *rq;
18
19	rq = intel_engine_create_kernel_request(engine);
20	if (IS_ERR(rq))
21		return rq;
22
23	i915_request_get(rq);
24	i915_request_add(rq);
25
26	return rq;
27}
28
29static int intel_hang_guc(void *arg)
30{
31	struct intel_gt *gt = arg;
32	int ret = 0;
33	struct i915_gem_context *ctx;
34	struct intel_context *ce;
35	struct igt_spinner spin;
36	struct i915_request *rq;
37	intel_wakeref_t wakeref;
38	struct i915_gpu_error *global = &gt->i915->gpu_error;
39	struct intel_engine_cs *engine = intel_selftest_find_any_engine(gt);
40	unsigned int reset_count;
41	u32 guc_status;
42	u32 old_beat;
43
44	if (!engine)
45		return 0;
46
47	ctx = kernel_context(gt->i915, NULL);
48	if (IS_ERR(ctx)) {
49		gt_err(gt, "Failed get kernel context: %pe\n", ctx);
50		return PTR_ERR(ctx);
51	}
52
53	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
54
55	ce = intel_context_create(engine);
56	if (IS_ERR(ce)) {
57		ret = PTR_ERR(ce);
58		gt_err(gt, "Failed to create spinner request: %pe\n", ce);
59		goto err;
60	}
61
62	reset_count = i915_reset_count(global);
63
64	old_beat = engine->props.heartbeat_interval_ms;
65	ret = intel_engine_set_heartbeat(engine, BEAT_INTERVAL);
66	if (ret) {
67		gt_err(gt, "Failed to boost heatbeat interval: %pe\n", ERR_PTR(ret));
68		goto err;
69	}
70
71	ret = igt_spinner_init(&spin, engine->gt);
72	if (ret) {
73		gt_err(gt, "Failed to create spinner: %pe\n", ERR_PTR(ret));
74		goto err;
75	}
76
77	rq = igt_spinner_create_request(&spin, ce, MI_ARB_CHECK);
78	intel_context_put(ce);
79	if (IS_ERR(rq)) {
80		ret = PTR_ERR(rq);
81		gt_err(gt, "Failed to create spinner request: %pe\n", rq);
82		goto err_spin;
83	}
84
85	ret = request_add_spin(rq, &spin);
86	if (ret) {
87		i915_request_put(rq);
88		gt_err(gt, "Failed to add Spinner request: %pe\n", ERR_PTR(ret));
89		goto err_spin;
90	}
91
92	ret = intel_reset_guc(gt);
93	if (ret) {
94		i915_request_put(rq);
95		gt_err(gt, "Failed to reset GuC: %pe\n", ERR_PTR(ret));
96		goto err_spin;
97	}
98
99	guc_status = intel_uncore_read(gt->uncore, GUC_STATUS);
100	if (!(guc_status & GS_MIA_IN_RESET)) {
101		i915_request_put(rq);
102		gt_err(gt, "Failed to reset GuC: status = 0x%08X\n", guc_status);
103		ret = -EIO;
104		goto err_spin;
105	}
106
107	/* Wait for the heartbeat to cause a reset */
108	ret = intel_selftest_wait_for_rq(rq);
109	i915_request_put(rq);
110	if (ret) {
111		gt_err(gt, "Request failed to complete: %pe\n", ERR_PTR(ret));
112		goto err_spin;
113	}
114
115	if (i915_reset_count(global) == reset_count) {
116		gt_err(gt, "Failed to record a GPU reset\n");
117		ret = -EINVAL;
118		goto err_spin;
119	}
120
121err_spin:
122	igt_spinner_end(&spin);
123	igt_spinner_fini(&spin);
124	intel_engine_set_heartbeat(engine, old_beat);
125
126	if (ret == 0) {
127		rq = nop_request(engine);
128		if (IS_ERR(rq)) {
129			ret = PTR_ERR(rq);
130			goto err;
131		}
132
133		ret = intel_selftest_wait_for_rq(rq);
134		i915_request_put(rq);
135		if (ret) {
136			gt_err(gt, "No-op failed to complete: %pe\n", ERR_PTR(ret));
137			goto err;
138		}
139	}
140
141err:
142	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
143	kernel_context_close(ctx);
144
145	return ret;
146}
147
148int intel_guc_hang_check(struct drm_i915_private *i915)
149{
150	static const struct i915_subtest tests[] = {
151		SUBTEST(intel_hang_guc),
152	};
153	struct intel_gt *gt = to_gt(i915);
154
155	if (intel_gt_is_wedged(gt))
156		return 0;
157
158	if (!intel_uc_uses_guc_submission(&gt->uc))
159		return 0;
160
161	return intel_gt_live_subtests(tests, gt);
162}
163