| Jean Pihet | e8db0be | 2011-08-25 15:35:03 +0200 | [diff] [blame^] | 1 | #ifndef _LINUX_PM_QOS_H |
| 2 | #define _LINUX_PM_QOS_H |
| 3 | /* interface for the pm_qos_power infrastructure of the linux kernel. |
| 4 | * |
| 5 | * Mark Gross <mgross@linux.intel.com> |
| 6 | */ |
| 7 | #include <linux/plist.h> |
| 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 | |
| 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 | |
| 23 | struct pm_qos_request_list { |
| 24 | struct plist_node list; |
| 25 | int pm_qos_class; |
| 26 | }; |
| 27 | |
| 28 | #ifdef CONFIG_PM |
| 29 | void pm_qos_add_request(struct pm_qos_request_list *l, |
| 30 | int pm_qos_class, s32 value); |
| 31 | void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req, |
| 32 | s32 new_value); |
| 33 | void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req); |
| 34 | |
| 35 | int pm_qos_request(int pm_qos_class); |
| 36 | int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier); |
| 37 | int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier); |
| 38 | int pm_qos_request_active(struct pm_qos_request_list *req); |
| 39 | #else |
| 40 | static inline void pm_qos_add_request(struct pm_qos_request_list *l, |
| 41 | int pm_qos_class, s32 value) |
| 42 | { return; } |
| 43 | static inline void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req, |
| 44 | s32 new_value) |
| 45 | { return; } |
| 46 | static inline void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req) |
| 47 | { return; } |
| 48 | |
| 49 | static inline int pm_qos_request(int pm_qos_class) |
| 50 | { return 0; } |
| 51 | static inline int pm_qos_add_notifier(int pm_qos_class, |
| 52 | struct notifier_block *notifier) |
| 53 | { return 0; } |
| 54 | static inline int pm_qos_remove_notifier(int pm_qos_class, |
| 55 | struct notifier_block *notifier) |
| 56 | { return 0; } |
| 57 | static inline int pm_qos_request_active(struct pm_qos_request_list *req) |
| 58 | { return 0; } |
| 59 | #endif |
| 60 | |
| 61 | #endif |