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cpuidle: Split cpuidle_state structure and move per-cpu statistics fields

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This is the first step towards global registration of cpuidle
states. The statistics used primarily by the governor are per-cpu
and have to be split from rest of the fields inside cpuidle_state,
which would be made global i.e. single copy. The driver_data field
is also per-cpu and moved.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Tested-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Deepthi Dharwar
2011-10-28 16:20:33 +05:30
committed by Len Brown
parent b25edc42bf
commit 4202735e8a
7 changed files with 90 additions and 54 deletions
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25
include/linux/cpuidle.h
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@@ -28,19 +28,22 @@ struct cpuidle_device;
* CPUIDLE DEVICE INTERFACE *
****************************/
struct cpuidle_state_usage {
void *driver_data;
unsigned long long usage;
unsigned long long time; /* in US */
};
struct cpuidle_state {
char name[CPUIDLE_NAME_LEN];
char desc[CPUIDLE_DESC_LEN];
void *driver_data;
unsigned int flags;
unsigned int exit_latency; /* in US */
unsigned int power_usage; /* in mW */
unsigned int target_residency; /* in US */
unsigned long long usage;
unsigned long long time; /* in US */
int (*enter) (struct cpuidle_device *dev,
int index);
};
@@ -52,26 +55,27 @@ struct cpuidle_state {
/**
* cpuidle_get_statedata - retrieves private driver state data
* @state: the state
* @st_usage: the state usage statistics
*/
static inline void * cpuidle_get_statedata(struct cpuidle_state *state)
static inline void *cpuidle_get_statedata(struct cpuidle_state_usage *st_usage)
{
return state->driver_data;
return st_usage->driver_data;
}
/**
* cpuidle_set_statedata - stores private driver state data
* @state: the state
* @st_usage: the state usage statistics
* @data: the private data
*/
static inline void
cpuidle_set_statedata(struct cpuidle_state *state, void *data)
cpuidle_set_statedata(struct cpuidle_state_usage *st_usage, void *data)
{
state->driver_data = data;
st_usage->driver_data = data;
}
struct cpuidle_state_kobj {
struct cpuidle_state *state;
struct cpuidle_state_usage *state_usage;
struct completion kobj_unregister;
struct kobject kobj;
};
@@ -85,6 +89,7 @@ struct cpuidle_device {
int last_residency;
int state_count;
struct cpuidle_state states[CPUIDLE_STATE_MAX];
struct cpuidle_state_usage states_usage[CPUIDLE_STATE_MAX];
struct cpuidle_state_kobj *kobjs[CPUIDLE_STATE_MAX];
struct list_head device_list;