| Lucille Sylvester | 20ec38a | 2011-09-14 10:51:28 -0600 | [diff] [blame] | 1 | #ifndef __ARCH_ARM_MACH_MSM_IDLE_STATS_DEVICE_H |
| 2 | #define __ARCH_ARM_MACH_MSM_IDLE_STATS_DEVICE_H |
| 3 | |
| 4 | #include <linux/types.h> |
| 5 | #include <linux/ioctl.h> |
| 6 | |
| 7 | #define MSM_IDLE_STATS_EVENT_NONE 0 |
| 8 | #define MSM_IDLE_STATS_EVENT_BUSY_TIMER_EXPIRED 1 |
| 9 | #define MSM_IDLE_STATS_EVENT_BUSY_TIMER_EXPIRED_RESET 2 |
| 10 | #define MSM_IDLE_STATS_EVENT_COLLECTION_NEARLY_FULL 4 |
| 11 | #define MSM_IDLE_STATS_EVENT_COLLECTION_FULL 8 |
| 12 | |
| 13 | /* |
| 14 | * All time, timer, and time interval values are in units of |
| 15 | * microseconds unless stated otherwise. |
| 16 | */ |
| 17 | #define MSM_IDLE_STATS_NR_MAX_INTERVALS 200 |
| 18 | |
| 19 | struct msm_idle_pulse { |
| 20 | __s64 busy_start_time; |
| 21 | __u32 busy_interval; |
| 22 | __u32 wait_interval; |
| 23 | }; |
| 24 | |
| 25 | struct msm_idle_read_stats { |
| 26 | __u32 event; |
| 27 | __s64 return_timestamp; |
| 28 | __u32 busy_timer_remaining; |
| 29 | __u32 nr_collected; |
| 30 | struct msm_idle_pulse pulse_chain[MSM_IDLE_STATS_NR_MAX_INTERVALS]; |
| 31 | }; |
| 32 | |
| 33 | struct msm_idle_write_stats { |
| 34 | __u32 busy_timer; |
| 35 | __u32 next_busy_timer; |
| 36 | }; |
| 37 | |
| 38 | #define MSM_IDLE_STATS_IOC_MAGIC 0xD8 |
| 39 | #define MSM_IDLE_STATS_IOC_READ_STATS \ |
| 40 | _IOWR(MSM_IDLE_STATS_IOC_MAGIC, 1, struct msm_idle_read_stats) |
| 41 | #define MSM_IDLE_STATS_IOC_WRITE_STATS \ |
| 42 | _IOWR(MSM_IDLE_STATS_IOC_MAGIC, 2, struct msm_idle_write_stats) |
| 43 | |
| 44 | #ifdef __KERNEL__ |
| 45 | #include <linux/hrtimer.h> |
| 46 | #include <linux/mutex.h> |
| 47 | #include <linux/miscdevice.h> |
| 48 | |
| 49 | struct msm_idle_stats_device { |
| 50 | const char *name; |
| 51 | void (*get_sample)(struct msm_idle_stats_device *device, |
| 52 | struct msm_idle_pulse *pulse); |
| 53 | |
| 54 | struct miscdevice miscdev; |
| 55 | spinlock_t lock; |
| 56 | wait_queue_head_t wait; |
| 57 | struct list_head list; |
| 58 | struct hrtimer busy_timer; |
| 59 | ktime_t busy_timer_interval; |
| 60 | ktime_t idle_start; |
| 61 | ktime_t remaining_time; |
| 62 | |
| 63 | struct msm_idle_read_stats *stats; |
| 64 | struct msm_idle_read_stats stats_vector[2]; |
| 65 | }; |
| 66 | |
| 67 | int msm_idle_stats_register_device(struct msm_idle_stats_device *device); |
| 68 | int msm_idle_stats_deregister_device(struct msm_idle_stats_device *device); |
| 69 | void msm_idle_stats_prepare_idle_start(struct msm_idle_stats_device *device); |
| 70 | void msm_idle_stats_abort_idle_start(struct msm_idle_stats_device *device); |
| 71 | void msm_idle_stats_idle_start(struct msm_idle_stats_device *device); |
| 72 | void msm_idle_stats_idle_end(struct msm_idle_stats_device *device, |
| 73 | struct msm_idle_pulse *pulse); |
| 74 | #endif |
| 75 | |
| 76 | #endif /* __ARCH_ARM_MACH_MSM_IDLE_STATS_DEVICE_H */ |
| 77 | |