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_modify_policy(struct intel_engine_cs * engine,struct intel_selftest_saved_policy * saved,u32 modify_type)17 int intel_selftest_modify_policy(struct intel_engine_cs *engine,
18 struct intel_selftest_saved_policy *saved,
19 u32 modify_type)
20
21 {
22 int err;
23
24 saved->reset = engine->i915->params.reset;
25 saved->flags = engine->flags;
26 saved->timeslice = engine->props.timeslice_duration_ms;
27 saved->preempt_timeout = engine->props.preempt_timeout_ms;
28
29 switch (modify_type) {
30 case SELFTEST_SCHEDULER_MODIFY_FAST_RESET:
31 /*
32 * Enable force pre-emption on time slice expiration
33 * together with engine reset on pre-emption timeout.
34 * This is required to make the GuC notice and reset
35 * the single hanging context.
36 * Also, reduce the preemption timeout to something
37 * small to speed the test up.
38 */
39 engine->i915->params.reset = 2;
40 engine->flags |= I915_ENGINE_WANT_FORCED_PREEMPTION;
41 engine->props.timeslice_duration_ms = REDUCED_TIMESLICE;
42 engine->props.preempt_timeout_ms = REDUCED_PREEMPT;
43 break;
44
45 case SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK:
46 engine->props.preempt_timeout_ms = 0;
47 break;
48
49 default:
50 pr_err("Invalid scheduler policy modification type: %d!\n", modify_type);
51 return -EINVAL;
52 }
53
54 if (!intel_engine_uses_guc(engine))
55 return 0;
56
57 err = intel_guc_global_policies_update(&engine->gt->uc.guc);
58 if (err)
59 intel_selftest_restore_policy(engine, saved);
60
61 return err;
62 }
63
intel_selftest_restore_policy(struct intel_engine_cs * engine,struct intel_selftest_saved_policy * saved)64 int intel_selftest_restore_policy(struct intel_engine_cs *engine,
65 struct intel_selftest_saved_policy *saved)
66 {
67 /* Restore the original policies */
68 engine->i915->params.reset = saved->reset;
69 engine->flags = saved->flags;
70 engine->props.timeslice_duration_ms = saved->timeslice;
71 engine->props.preempt_timeout_ms = saved->preempt_timeout;
72
73 if (!intel_engine_uses_guc(engine))
74 return 0;
75
76 return intel_guc_global_policies_update(&engine->gt->uc.guc);
77 }
78
intel_selftest_wait_for_rq(struct i915_request * rq)79 int intel_selftest_wait_for_rq(struct i915_request *rq)
80 {
81 long ret;
82
83 ret = i915_request_wait(rq, 0, WAIT_FOR_RESET_TIME);
84 if (ret < 0)
85 return ret;
86
87 return 0;
88 }
89
