1#ifndef _LINUX_PM_QOS_H
2#define _LINUX_PM_QOS_H
3
4
5
6
7#include <linux/plist.h>
8#include <linux/notifier.h>
9#include <linux/miscdevice.h>
10#include <linux/device.h>
11#include <linux/workqueue.h>
12
13enum {
14 PM_QOS_RESERVED = 0,
15 PM_QOS_CPU_DMA_LATENCY,
16 PM_QOS_NETWORK_LATENCY,
17 PM_QOS_NETWORK_THROUGHPUT,
18 PM_QOS_MEMORY_BANDWIDTH,
19
20
21 PM_QOS_NUM_CLASSES,
22};
23
24enum pm_qos_flags_status {
25 PM_QOS_FLAGS_UNDEFINED = -1,
26 PM_QOS_FLAGS_NONE,
27 PM_QOS_FLAGS_SOME,
28 PM_QOS_FLAGS_ALL,
29};
30
31#define PM_QOS_DEFAULT_VALUE -1
32
33#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
34#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
35#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
36#define PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE 0
37#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0
38#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
39#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
40#define PM_QOS_LATENCY_ANY ((s32)(~(__u32)0 >> 1))
41
42#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
43#define PM_QOS_FLAG_REMOTE_WAKEUP (1 << 1)
44
45struct pm_qos_request {
46 struct plist_node node;
47 int pm_qos_class;
48 struct delayed_work work;
49};
50
51struct pm_qos_flags_request {
52 struct list_head node;
53 s32 flags;
54};
55
56enum dev_pm_qos_req_type {
57 DEV_PM_QOS_RESUME_LATENCY = 1,
58 DEV_PM_QOS_LATENCY_TOLERANCE,
59 DEV_PM_QOS_FLAGS,
60};
61
62struct dev_pm_qos_request {
63 enum dev_pm_qos_req_type type;
64 union {
65 struct plist_node pnode;
66 struct pm_qos_flags_request flr;
67 } data;
68 struct device *dev;
69};
70
71enum pm_qos_type {
72 PM_QOS_UNITIALIZED,
73 PM_QOS_MAX,
74 PM_QOS_MIN,
75 PM_QOS_SUM
76};
77
78
79
80
81
82
83struct pm_qos_constraints {
84 struct plist_head list;
85 s32 target_value;
86 s32 default_value;
87 s32 no_constraint_value;
88 enum pm_qos_type type;
89 struct blocking_notifier_head *notifiers;
90};
91
92struct pm_qos_flags {
93 struct list_head list;
94 s32 effective_flags;
95};
96
97struct dev_pm_qos {
98 struct pm_qos_constraints resume_latency;
99 struct pm_qos_constraints latency_tolerance;
100 struct pm_qos_flags flags;
101 struct dev_pm_qos_request *resume_latency_req;
102 struct dev_pm_qos_request *latency_tolerance_req;
103 struct dev_pm_qos_request *flags_req;
104};
105
106
107enum pm_qos_req_action {
108 PM_QOS_ADD_REQ,
109 PM_QOS_UPDATE_REQ,
110 PM_QOS_REMOVE_REQ
111};
112
113static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
114{
115 return req->dev != NULL;
116}
117
118int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
119 enum pm_qos_req_action action, int value);
120bool pm_qos_update_flags(struct pm_qos_flags *pqf,
121 struct pm_qos_flags_request *req,
122 enum pm_qos_req_action action, s32 val);
123void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
124 s32 value);
125void pm_qos_update_request(struct pm_qos_request *req,
126 s32 new_value);
127void pm_qos_update_request_timeout(struct pm_qos_request *req,
128 s32 new_value, unsigned long timeout_us);
129void pm_qos_remove_request(struct pm_qos_request *req);
130
131int pm_qos_request(int pm_qos_class);
132int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
133int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
134int pm_qos_request_active(struct pm_qos_request *req);
135s32 pm_qos_read_value(struct pm_qos_constraints *c);
136
137#ifdef CONFIG_PM
138enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
139enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
140s32 __dev_pm_qos_read_value(struct device *dev);
141s32 dev_pm_qos_read_value(struct device *dev);
142int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
143 enum dev_pm_qos_req_type type, s32 value);
144int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
145int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
146int dev_pm_qos_add_notifier(struct device *dev,
147 struct notifier_block *notifier);
148int dev_pm_qos_remove_notifier(struct device *dev,
149 struct notifier_block *notifier);
150int dev_pm_qos_add_global_notifier(struct notifier_block *notifier);
151int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier);
152void dev_pm_qos_constraints_init(struct device *dev);
153void dev_pm_qos_constraints_destroy(struct device *dev);
154int dev_pm_qos_add_ancestor_request(struct device *dev,
155 struct dev_pm_qos_request *req,
156 enum dev_pm_qos_req_type type, s32 value);
157#else
158static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
159 s32 mask)
160 { return PM_QOS_FLAGS_UNDEFINED; }
161static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
162 s32 mask)
163 { return PM_QOS_FLAGS_UNDEFINED; }
164static inline s32 __dev_pm_qos_read_value(struct device *dev)
165 { return 0; }
166static inline s32 dev_pm_qos_read_value(struct device *dev)
167 { return 0; }
168static inline int dev_pm_qos_add_request(struct device *dev,
169 struct dev_pm_qos_request *req,
170 enum dev_pm_qos_req_type type,
171 s32 value)
172 { return 0; }
173static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
174 s32 new_value)
175 { return 0; }
176static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
177 { return 0; }
178static inline int dev_pm_qos_add_notifier(struct device *dev,
179 struct notifier_block *notifier)
180 { return 0; }
181static inline int dev_pm_qos_remove_notifier(struct device *dev,
182 struct notifier_block *notifier)
183 { return 0; }
184static inline int dev_pm_qos_add_global_notifier(
185 struct notifier_block *notifier)
186 { return 0; }
187static inline int dev_pm_qos_remove_global_notifier(
188 struct notifier_block *notifier)
189 { return 0; }
190static inline void dev_pm_qos_constraints_init(struct device *dev)
191{
192 dev->power.power_state = PMSG_ON;
193}
194static inline void dev_pm_qos_constraints_destroy(struct device *dev)
195{
196 dev->power.power_state = PMSG_INVALID;
197}
198static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
199 struct dev_pm_qos_request *req,
200 enum dev_pm_qos_req_type type,
201 s32 value)
202 { return 0; }
203#endif
204
205#ifdef CONFIG_PM_RUNTIME
206int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
207void dev_pm_qos_hide_latency_limit(struct device *dev);
208int dev_pm_qos_expose_flags(struct device *dev, s32 value);
209void dev_pm_qos_hide_flags(struct device *dev);
210int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
211s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
212int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
213
214static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
215{
216 return dev->power.qos->resume_latency_req->data.pnode.prio;
217}
218
219static inline s32 dev_pm_qos_requested_flags(struct device *dev)
220{
221 return dev->power.qos->flags_req->data.flr.flags;
222}
223#else
224static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
225 { return 0; }
226static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
227static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
228 { return 0; }
229static inline void dev_pm_qos_hide_flags(struct device *dev) {}
230static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
231 { return 0; }
232static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
233 { return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
234static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
235 { return 0; }
236
237static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; }
238static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
239#endif
240
241#endif
242