1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2021 Intel Corporation
4 */
5
6 //#include "gt/intel_engine_user.h"
7 #include "gt/intel_gt.h"
8 #include "i915_drv.h"
9 #include "i915_selftest.h"
10
11 #include "selftests/intel_scheduler_helpers.h"
12
13 #define REDUCED_TIMESLICE 5
14 #define REDUCED_PREEMPT 10
15 #define WAIT_FOR_RESET_TIME 10000
16
intel_selftest_find_any_engine(struct intel_gt * gt)17 struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt)
18 {
19 struct intel_engine_cs *engine;
20 enum intel_engine_id id;
21
22 for_each_engine(engine, gt, id)
23 return engine;
24
25 pr_err("No valid engine found!\n");
26 return NULL;
27 }
28
intel_selftest_modify_policy(struct intel_engine_cs * engine,struct intel_selftest_saved_policy * saved,u32 modify_type)29 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
30 struct intel_selftest_saved_policy *saved,
31 u32 modify_type)
32
33 {
34 int err;
35
36 saved->reset = engine->i915->params.reset;
37 saved->flags = engine->flags;
38 saved->timeslice = engine->props.timeslice_duration_ms;
39 saved->preempt_timeout = engine->props.preempt_timeout_ms;
40
41 switch (modify_type) {
42 case SELFTEST_SCHEDULER_MODIFY_FAST_RESET:
43 /*
44 * Enable force pre-emption on time slice expiration
45 * together with engine reset on pre-emption timeout.
46 * This is required to make the GuC notice and reset
47 * the single hanging context.
48 * Also, reduce the preemption timeout to something
49 * small to speed the test up.
50 */
51 engine->i915->params.reset = 2;
52 engine->flags |= I915_ENGINE_WANT_FORCED_PREEMPTION;
53 engine->props.timeslice_duration_ms = REDUCED_TIMESLICE;
54 engine->props.preempt_timeout_ms = REDUCED_PREEMPT;
55 break;
56
57 case SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK:
58 engine->props.preempt_timeout_ms = 0;
59 break;
60
61 default:
62 pr_err("Invalid scheduler policy modification type: %d!\n", modify_type);
63 return -EINVAL;
64 }
65
66 if (!intel_engine_uses_guc(engine))
67 return 0;
68
69 err = intel_guc_global_policies_update(&engine->gt->uc.guc);
70 if (err)
71 intel_selftest_restore_policy(engine, saved);
72
73 return err;
74 }
75
intel_selftest_restore_policy(struct intel_engine_cs * engine,struct intel_selftest_saved_policy * saved)76 int intel_selftest_restore_policy(struct intel_engine_cs *engine,
77 struct intel_selftest_saved_policy *saved)
78 {
79 /* Restore the original policies */
80 engine->i915->params.reset = saved->reset;
81 engine->flags = saved->flags;
82 engine->props.timeslice_duration_ms = saved->timeslice;
83 engine->props.preempt_timeout_ms = saved->preempt_timeout;
84
85 if (!intel_engine_uses_guc(engine))
86 return 0;
87
88 return intel_guc_global_policies_update(&engine->gt->uc.guc);
89 }
90
intel_selftest_wait_for_rq(struct i915_request * rq)91 int intel_selftest_wait_for_rq(struct i915_request *rq)
92 {
93 long ret;
94
95 ret = i915_request_wait(rq, 0, WAIT_FOR_RESET_TIME);
96 if (ret < 0)
97 return ret;
98
99 return 0;
100 }
101