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