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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
drivers/acpi/processor_idle.c
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@@ -745,14 +745,13 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
*
* This is equivalent to the HALT instruction.
*/
static int acpi_idle_enter_c1(struct cpuidle_device *dev,
int index)
static int acpi_idle_enter_c1(struct cpuidle_device *dev, int index)
{
ktime_t kt1, kt2;
s64 idle_time;
struct acpi_processor *pr;
struct cpuidle_state *state = &dev->states[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
pr = __this_cpu_read(processors);
dev->last_residency = 0;
@@ -790,12 +789,11 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
* @dev: the target CPU
* @index: the index of suggested state
*/
static int acpi_idle_enter_simple(struct cpuidle_device *dev,
int index)
static int acpi_idle_enter_simple(struct cpuidle_device *dev, int index)
{
struct acpi_processor *pr;
struct cpuidle_state *state = &dev->states[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
ktime_t kt1, kt2;
s64 idle_time_ns;
s64 idle_time;
@@ -875,12 +873,11 @@ static DEFINE_SPINLOCK(c3_lock);
*
* If BM is detected, the deepest non-C3 idle state is entered instead.
*/
static int acpi_idle_enter_bm(struct cpuidle_device *dev,
int index)
static int acpi_idle_enter_bm(struct cpuidle_device *dev, int index)
{
struct acpi_processor *pr;
struct cpuidle_state *state = &dev->states[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
struct acpi_processor_cx *cx = cpuidle_get_statedata(state_usage);
ktime_t kt1, kt2;
s64 idle_time_ns;
s64 idle_time;
@@ -1004,6 +1001,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
int i, count = CPUIDLE_DRIVER_STATE_START;
struct acpi_processor_cx *cx;
struct cpuidle_state *state;
struct cpuidle_state_usage *state_usage;
struct cpuidle_device *dev = &pr->power.dev;
if (!pr->flags.power_setup_done)
@@ -1026,6 +1024,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) {
cx = &pr->power.states[i];
state = &dev->states[count];
state_usage = &dev->states_usage[count];
if (!cx->valid)
continue;
@@ -1036,7 +1035,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
!(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
continue;
#endif
cpuidle_set_statedata(state, cx);
cpuidle_set_statedata(state_usage, cx);
snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);