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e8db0be1 JP |
1 | #ifndef _LINUX_PM_QOS_H |
2 | #define _LINUX_PM_QOS_H | |
d82b3518 MG |
3 | /* interface for the pm_qos_power infrastructure of the linux kernel. |
4 | * | |
bf1db69f | 5 | * Mark Gross <mgross@linux.intel.com> |
d82b3518 | 6 | */ |
82f68251 | 7 | #include <linux/plist.h> |
d82b3518 MG |
8 | #include <linux/notifier.h> |
9 | #include <linux/miscdevice.h> | |
10 | ||
11 | #define PM_QOS_RESERVED 0 | |
12 | #define PM_QOS_CPU_DMA_LATENCY 1 | |
13 | #define PM_QOS_NETWORK_LATENCY 2 | |
14 | #define PM_QOS_NETWORK_THROUGHPUT 3 | |
15 | ||
16 | #define PM_QOS_NUM_CLASSES 4 | |
17 | #define PM_QOS_DEFAULT_VALUE -1 | |
18 | ||
333c5ae9 TC |
19 | #define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) |
20 | #define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC) | |
21 | #define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0 | |
22 | ||
cc749986 JP |
23 | struct pm_qos_request { |
24 | struct plist_node node; | |
82f68251 JB |
25 | int pm_qos_class; |
26 | }; | |
d82b3518 | 27 | |
4e1779ba JP |
28 | enum pm_qos_type { |
29 | PM_QOS_UNITIALIZED, | |
30 | PM_QOS_MAX, /* return the largest value */ | |
31 | PM_QOS_MIN /* return the smallest value */ | |
32 | }; | |
33 | ||
34 | /* | |
35 | * Note: The lockless read path depends on the CPU accessing | |
36 | * target_value atomically. Atomic access is only guaranteed on all CPU | |
37 | * types linux supports for 32 bit quantites | |
38 | */ | |
39 | struct pm_qos_constraints { | |
40 | struct plist_head list; | |
41 | s32 target_value; /* Do not change to 64 bit */ | |
42 | s32 default_value; | |
43 | enum pm_qos_type type; | |
44 | struct blocking_notifier_head *notifiers; | |
45 | }; | |
46 | ||
e8db0be1 | 47 | #ifdef CONFIG_PM |
cc749986 JP |
48 | void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class, |
49 | s32 value); | |
50 | void pm_qos_update_request(struct pm_qos_request *req, | |
e8db0be1 | 51 | s32 new_value); |
cc749986 | 52 | void pm_qos_remove_request(struct pm_qos_request *req); |
d82b3518 | 53 | |
ed77134b MG |
54 | int pm_qos_request(int pm_qos_class); |
55 | int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier); | |
56 | int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier); | |
cc749986 | 57 | int pm_qos_request_active(struct pm_qos_request *req); |
e8db0be1 | 58 | #else |
cc749986 | 59 | static inline void pm_qos_add_request(struct pm_qos_request *req, |
e8db0be1 JP |
60 | int pm_qos_class, s32 value) |
61 | { return; } | |
cc749986 | 62 | static inline void pm_qos_update_request(struct pm_qos_request *req, |
e8db0be1 JP |
63 | s32 new_value) |
64 | { return; } | |
cc749986 | 65 | static inline void pm_qos_remove_request(struct pm_qos_request *req) |
e8db0be1 JP |
66 | { return; } |
67 | ||
68 | static inline int pm_qos_request(int pm_qos_class) | |
69 | { return 0; } | |
70 | static inline int pm_qos_add_notifier(int pm_qos_class, | |
71 | struct notifier_block *notifier) | |
72 | { return 0; } | |
73 | static inline int pm_qos_remove_notifier(int pm_qos_class, | |
74 | struct notifier_block *notifier) | |
75 | { return 0; } | |
cc749986 | 76 | static inline int pm_qos_request_active(struct pm_qos_request *req) |
e8db0be1 JP |
77 | { return 0; } |
78 | #endif | |
d82b3518 | 79 | |
82f68251 | 80 | #endif |