xref: /openbmc/linux/drivers/gpu/drm/i915/gt/intel_gt_pm.h (revision 8306d6f3) 
1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright © 2019 Intel Corporation
4  */
5 
6 #ifndef INTEL_GT_PM_H
7 #define INTEL_GT_PM_H
8 
9 #include <linux/types.h>
10 
11 #include "intel_gt_types.h"
12 #include "intel_wakeref.h"
13 
14 static inline bool intel_gt_pm_is_awake(const struct intel_gt *gt)
15 {
16 	return intel_wakeref_is_active(&gt->wakeref);
17 }
18 
19 static inline void intel_gt_pm_get(struct intel_gt *gt)
20 {
21 	intel_wakeref_get(&gt->wakeref);
22 }
23 
24 static inline void __intel_gt_pm_get(struct intel_gt *gt)
25 {
26 	__intel_wakeref_get(&gt->wakeref);
27 }
28 
29 static inline bool intel_gt_pm_get_if_awake(struct intel_gt *gt)
30 {
31 	return intel_wakeref_get_if_active(&gt->wakeref);
32 }
33 
34 static inline void intel_gt_pm_might_get(struct intel_gt *gt)
35 {
36 	intel_wakeref_might_get(&gt->wakeref);
37 }
38 
39 static inline void intel_gt_pm_put(struct intel_gt *gt)
40 {
41 	intel_wakeref_put(&gt->wakeref);
42 }
43 
44 static inline void intel_gt_pm_put_async(struct intel_gt *gt)
45 {
46 	intel_wakeref_put_async(&gt->wakeref);
47 }
48 
49 static inline void intel_gt_pm_might_put(struct intel_gt *gt)
50 {
51 	intel_wakeref_might_put(&gt->wakeref);
52 }
53 
54 #define with_intel_gt_pm(gt, tmp) \
55 	for (tmp = 1, intel_gt_pm_get(gt); tmp; \
56 	     intel_gt_pm_put(gt), tmp = 0)
57 
58 /**
59  * with_intel_gt_pm_if_awake - if GT is PM awake, get a reference to prevent
60  *	it to sleep, run some code and then asynchrously put the reference
61  *	away.
62  *
63  * @gt: pointer to the gt
64  * @wf: pointer to a temporary wakeref.
65  */
66 #define with_intel_gt_pm_if_awake(gt, wf) \
67 	for (wf = intel_gt_pm_get_if_awake(gt); wf; intel_gt_pm_put_async(gt), wf = 0)
68 
69 static inline int intel_gt_pm_wait_for_idle(struct intel_gt *gt)
70 {
71 	return intel_wakeref_wait_for_idle(&gt->wakeref);
72 }
73 
74 void intel_gt_pm_init_early(struct intel_gt *gt);
75 void intel_gt_pm_init(struct intel_gt *gt);
76 void intel_gt_pm_fini(struct intel_gt *gt);
77 
78 void intel_gt_suspend_prepare(struct intel_gt *gt);
79 void intel_gt_suspend_late(struct intel_gt *gt);
80 int intel_gt_resume(struct intel_gt *gt);
81 
82 void intel_gt_runtime_suspend(struct intel_gt *gt);
83 int intel_gt_runtime_resume(struct intel_gt *gt);
84 
85 ktime_t intel_gt_get_awake_time(const struct intel_gt *gt);
86 
87 static inline bool is_mock_gt(const struct intel_gt *gt)
88 {
89 	return I915_SELFTEST_ONLY(gt->awake == -ENODEV);
90 }
91 
92 #endif /* INTEL_GT_PM_H */
93