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6#ifndef __INTEL_RUNTIME_PM_H__
7#define __INTEL_RUNTIME_PM_H__
8
9#include <linux/types.h>
10
11#include "display/intel_display.h"
12
13#include "intel_wakeref.h"
14
15#include "i915_utils.h"
16
17struct device;
18struct drm_i915_private;
19struct drm_printer;
20
21enum i915_drm_suspend_mode {
22 I915_DRM_SUSPEND_IDLE,
23 I915_DRM_SUSPEND_MEM,
24 I915_DRM_SUSPEND_HIBERNATE,
25};
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50struct intel_runtime_pm {
51 atomic_t wakeref_count;
52 struct device *kdev;
53 bool available;
54 bool suspended;
55 bool irqs_enabled;
56
57#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
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65 struct intel_runtime_pm_debug {
66 spinlock_t lock;
67
68 depot_stack_handle_t last_acquire;
69 depot_stack_handle_t last_release;
70
71 depot_stack_handle_t *owners;
72 unsigned long count;
73 } debug;
74#endif
75};
76
77#define BITS_PER_WAKEREF \
78 BITS_PER_TYPE(struct_member(struct intel_runtime_pm, wakeref_count))
79#define INTEL_RPM_WAKELOCK_SHIFT (BITS_PER_WAKEREF / 2)
80#define INTEL_RPM_WAKELOCK_BIAS (1 << INTEL_RPM_WAKELOCK_SHIFT)
81#define INTEL_RPM_RAW_WAKEREF_MASK (INTEL_RPM_WAKELOCK_BIAS - 1)
82
83static inline int
84intel_rpm_raw_wakeref_count(int wakeref_count)
85{
86 return wakeref_count & INTEL_RPM_RAW_WAKEREF_MASK;
87}
88
89static inline int
90intel_rpm_wakelock_count(int wakeref_count)
91{
92 return wakeref_count >> INTEL_RPM_WAKELOCK_SHIFT;
93}
94
95static inline void
96assert_rpm_device_not_suspended(struct intel_runtime_pm *rpm)
97{
98 WARN_ONCE(rpm->suspended,
99 "Device suspended during HW access\n");
100}
101
102static inline void
103__assert_rpm_raw_wakeref_held(struct intel_runtime_pm *rpm, int wakeref_count)
104{
105 assert_rpm_device_not_suspended(rpm);
106 WARN_ONCE(!intel_rpm_raw_wakeref_count(wakeref_count),
107 "RPM raw-wakeref not held\n");
108}
109
110static inline void
111__assert_rpm_wakelock_held(struct intel_runtime_pm *rpm, int wakeref_count)
112{
113 __assert_rpm_raw_wakeref_held(rpm, wakeref_count);
114 WARN_ONCE(!intel_rpm_wakelock_count(wakeref_count),
115 "RPM wakelock ref not held during HW access\n");
116}
117
118static inline void
119assert_rpm_raw_wakeref_held(struct intel_runtime_pm *rpm)
120{
121 __assert_rpm_raw_wakeref_held(rpm, atomic_read(&rpm->wakeref_count));
122}
123
124static inline void
125assert_rpm_wakelock_held(struct intel_runtime_pm *rpm)
126{
127 __assert_rpm_wakelock_held(rpm, atomic_read(&rpm->wakeref_count));
128}
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148static inline void
149disable_rpm_wakeref_asserts(struct intel_runtime_pm *rpm)
150{
151 atomic_add(INTEL_RPM_WAKELOCK_BIAS + 1,
152 &rpm->wakeref_count);
153}
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166static inline void
167enable_rpm_wakeref_asserts(struct intel_runtime_pm *rpm)
168{
169 atomic_sub(INTEL_RPM_WAKELOCK_BIAS + 1,
170 &rpm->wakeref_count);
171}
172
173void intel_runtime_pm_init_early(struct intel_runtime_pm *rpm);
174void intel_runtime_pm_enable(struct intel_runtime_pm *rpm);
175void intel_runtime_pm_disable(struct intel_runtime_pm *rpm);
176void intel_runtime_pm_driver_release(struct intel_runtime_pm *rpm);
177
178intel_wakeref_t intel_runtime_pm_get(struct intel_runtime_pm *rpm);
179intel_wakeref_t intel_runtime_pm_get_if_in_use(struct intel_runtime_pm *rpm);
180intel_wakeref_t intel_runtime_pm_get_noresume(struct intel_runtime_pm *rpm);
181intel_wakeref_t intel_runtime_pm_get_raw(struct intel_runtime_pm *rpm);
182
183#define with_intel_runtime_pm(rpm, wf) \
184 for ((wf) = intel_runtime_pm_get(rpm); (wf); \
185 intel_runtime_pm_put((rpm), (wf)), (wf) = 0)
186
187#define with_intel_runtime_pm_if_in_use(rpm, wf) \
188 for ((wf) = intel_runtime_pm_get_if_in_use(rpm); (wf); \
189 intel_runtime_pm_put((rpm), (wf)), (wf) = 0)
190
191void intel_runtime_pm_put_unchecked(struct intel_runtime_pm *rpm);
192#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
193void intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref);
194#else
195static inline void
196intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref)
197{
198 intel_runtime_pm_put_unchecked(rpm);
199}
200#endif
201void intel_runtime_pm_put_raw(struct intel_runtime_pm *rpm, intel_wakeref_t wref);
202
203#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
204void print_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm,
205 struct drm_printer *p);
206#else
207static inline void print_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm,
208 struct drm_printer *p)
209{
210}
211#endif
212
213#endif
214