[RFC PATCH V3 3/4] Split cpuidle_state structure and move per-cpustatistics fields

From: Trinabh Gupta
Date: Wed Apr 20 2011 - 02:56:23 EST

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: Trinabh Gupta <trinabh@xxxxxxxxxxxxxxxxxx>
---

arch/arm/mach-at91/cpuidle.c | 4 +--
arch/arm/mach-davinci/cpuidle.c | 9 +++---
arch/arm/mach-kirkwood/cpuidle.c | 4 +--
arch/arm/mach-omap2/cpuidle34xx.c | 17 ++++++-----
arch/sh/kernel/cpu/shmobile/cpuidle.c | 4 +--
drivers/acpi/processor_idle.c | 37 +++++++++++------------
drivers/cpuidle/cpuidle.c | 12 ++++----
drivers/cpuidle/sysfs.c | 15 ++++++----
drivers/idle/intel_idle.c | 52 ++++++++++++++++++++++++---------
include/linux/cpuidle.h | 25 ++++++++++------
10 files changed, 108 insertions(+), 71 deletions(-)

diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
index c85da01..ed38e3c 100644
--- a/arch/arm/mach-at91/cpuidle.c
+++ b/arch/arm/mach-at91/cpuidle.c
@@ -58,8 +58,8 @@ static int at91_enter_idle(struct cpuidle_device *dev,

/* Update cpuidle counters */
dev->last_residency = idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ dev->states_usage[index].time += (unsigned long long)dev->last_residency;
+ dev->states_usage[index].usage++;

return index;
}
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index 0053aaa..e3aebe6 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -80,7 +80,8 @@ static struct davinci_ops davinci_states[DAVINCI_CPUIDLE_MAX_STATES] = {
static int davinci_enter_idle(struct cpuidle_device *dev,
int index)
{
- struct davinci_ops *ops = cpuidle_get_statedata(&dev->states[index]);
+ struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
+ struct davinci_ops *ops = cpuidle_get_statedata(state_usage);
struct timeval before, after;
int idle_time;

@@ -101,8 +102,8 @@ static int davinci_enter_idle(struct cpuidle_device *dev,

/* Update cpuidle counters */
dev->last_residency = idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ state_usage->time += (unsigned long long)dev->last_residency;
+ state_usage->usage++;

return index;
}
@@ -145,7 +146,7 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev)
strcpy(device->states[1].desc, "WFI and DDR Self Refresh");
if (pdata->ddr2_pdown)
davinci_states[1].flags |= DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN;
- cpuidle_set_statedata(&device->states[1], &davinci_states[1]);
+ cpuidle_set_statedata(&device->states_usage[1], &davinci_states[1]);

device->state_count = DAVINCI_CPUIDLE_MAX_STATES;

diff --git a/arch/arm/mach-kirkwood/cpuidle.c b/arch/arm/mach-kirkwood/cpuidle.c
index a5f6fef..d135a41 100644
--- a/arch/arm/mach-kirkwood/cpuidle.c
+++ b/arch/arm/mach-kirkwood/cpuidle.c
@@ -60,8 +60,8 @@ static int kirkwood_enter_idle(struct cpuidle_device *dev,

/* Update cpuidle counters */
dev->last_residency = idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ dev->states_usage[index].time += (unsigned long long)dev->last_residency;
+ dev->states_usage[index].usage++;

return index;
}
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 0b00872..4282420 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -123,7 +123,7 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
int index)
{
struct omap3_processor_cx *cx =
- cpuidle_get_statedata(&dev->states[index]);
+ cpuidle_get_statedata(&dev->states_usage[index]);
struct timespec ts_preidle, ts_postidle, ts_idle;
u32 mpu_state = cx->mpu_state, core_state = cx->core_state;
int idle_time;
@@ -166,8 +166,8 @@ return_sleep_time:

/* Update cpuidle counters */
dev->last_residency = idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ dev->states_usage[index].time += (unsigned long long)dev->last_residency;
+ dev->states_usage[index].usage++;

return index;
}
@@ -185,11 +185,12 @@ static int next_valid_state(struct cpuidle_device *dev,
int index)
{
struct cpuidle_state *curr = &dev->states[index];
+ struct cpuidle_state_usage *curr_usage = &dev->states_usage[index];
struct cpuidle_state *next = NULL;
struct omap3_processor_cx *cx;
int next_index;

- cx = (struct omap3_processor_cx *)cpuidle_get_statedata(curr);
+ cx = (struct omap3_processor_cx *)cpuidle_get_statedata(curr_usage);

/* Check if current state is valid */
if (cx->valid) {
@@ -221,7 +222,7 @@ static int next_valid_state(struct cpuidle_device *dev,
for (; idx >= OMAP3_STATE_C1; idx--) {
struct omap3_processor_cx *cx;

- cx = cpuidle_get_statedata(&dev->states[idx]);
+ cx = cpuidle_get_statedata(&dev->states_usage[idx]);
if (cx->valid) {
next = &dev->states[idx];
next_index = idx;
@@ -262,7 +263,7 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
goto select_state;
}

- cx = cpuidle_get_statedata(state);
+ cx = cpuidle_get_statedata(&dev->states_usage[index]);
core_next_state = cx->core_state;

/*
@@ -506,6 +507,7 @@ int __init omap3_idle_init(void)
int i, count = 0;
struct omap3_processor_cx *cx;
struct cpuidle_state *state;
+ struct cpuidle_state_usage *state_usage;
struct cpuidle_device *dev;

mpu_pd = pwrdm_lookup("mpu_pwrdm");
@@ -521,10 +523,11 @@ int __init omap3_idle_init(void)
for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
cx = &omap3_power_states[i];
state = &dev->states[count];
+ state_usage = &dev->states_usage[count];

if (!cx->valid)
continue;
- cpuidle_set_statedata(state, cx);
+ cpuidle_set_statedata(state_usage, cx);
state->exit_latency = cx->sleep_latency + cx->wakeup_latency;
state->target_residency = cx->threshold;
state->flags = cx->flags;
diff --git a/arch/sh/kernel/cpu/shmobile/cpuidle.c b/arch/sh/kernel/cpu/shmobile/cpuidle.c
index 89ac9f4..2340d62 100644
--- a/arch/sh/kernel/cpu/shmobile/cpuidle.c
+++ b/arch/sh/kernel/cpu/shmobile/cpuidle.c
@@ -52,8 +52,8 @@ static int cpuidle_sleep_enter(struct cpuidle_device *dev,

/* Update cpuidle counters */
dev->last_residency = (int)ktime_to_ns(ktime_sub(after, before)) >> 10;
- dev->states[k].time += (unsigned long long)dev->last_residency;
- dev->states[k].usage++;
+ dev->states_usage[k].time += (unsigned long long)dev->last_residency;
+ dev->states_usage[k].usage++;

return k;
}
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 00712a7..bd29363 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -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;
@@ -777,8 +776,8 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,

/* Update device last_residency and state counters*/
dev->last_residency = (int)idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ state_usage->time += (unsigned long long)dev->last_residency;
+ state_usage->usage++;

local_irq_enable();
cx->usage++;
@@ -792,12 +791,11 @@ 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;
@@ -852,8 +850,8 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,

/* Update device last_residency and state counters*/
dev->last_residency = (int)idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ state_usage->time += (unsigned long long)dev->last_residency;
+ state_usage->usage++;

/* Tell the scheduler how much we idled: */
sched_clock_idle_wakeup_event(idle_time_ns);
@@ -879,12 +877,11 @@ 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;
@@ -979,8 +976,8 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,

/* Update device last_residency and state counters*/
dev->last_residency = (int)idle_time;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ state_usage->time += (unsigned long long)dev->last_residency;
+ state_usage->usage++;

/* Tell the scheduler how much we idled: */
sched_clock_idle_wakeup_event(idle_time_ns);
@@ -1010,6 +1007,7 @@ 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)
@@ -1032,6 +1030,7 @@ 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;
@@ -1042,7 +1041,7 @@ 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);
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 92a6216..5d6f98d 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -160,8 +160,9 @@ static int poll_idle(struct cpuidle_device *dev, int index)
diff = INT_MAX;

dev->last_residency = (int) diff;
- dev->states[index].time += (unsigned long long)dev->last_residency;
- dev->states[index].usage++;
+ dev->states_usage[index].time +=
+ (unsigned long long)dev->last_residency;
+ dev->states_usage[index].usage++;

return index;
}
@@ -169,8 +170,9 @@ static int poll_idle(struct cpuidle_device *dev, int index)
static void poll_idle_init(struct cpuidle_device *dev)
{
struct cpuidle_state *state = &dev->states[0];
+ struct cpuidle_state_usage *state_usage = &dev->states_usage[0];

- cpuidle_set_statedata(state, NULL);
+ cpuidle_set_statedata(state_usage, NULL);

snprintf(state->name, CPUIDLE_NAME_LEN, "POLL");
snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE");
@@ -218,8 +220,8 @@ int cpuidle_enable_device(struct cpuidle_device *dev)
goto fail_sysfs;

for (i = 0; i < dev->state_count; i++) {
- dev->states[i].usage = 0;
- dev->states[i].time = 0;
+ dev->states_usage[i].usage = 0;
+ dev->states_usage[i].time = 0;
}
dev->last_residency = 0;

diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index be7917e..09c9c77 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -216,7 +216,7 @@ static struct kobj_type ktype_cpuidle = {

struct cpuidle_state_attr {
struct attribute attr;
- ssize_t (*show)(struct cpuidle_state *, char *);
+ ssize_t (*show)(struct cpuidle_state *, struct cpuidle_state_usage *, char *);
ssize_t (*store)(struct cpuidle_state *, const char *, size_t);
};

@@ -224,19 +224,19 @@ struct cpuidle_state_attr {
static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)

#define define_show_state_function(_name) \
-static ssize_t show_state_##_name(struct cpuidle_state *state, char *buf) \
+static ssize_t show_state_##_name(struct cpuidle_state *state, struct cpuidle_state_usage *state_usage, char *buf) \
{ \
return sprintf(buf, "%u\n", state->_name);\
}

#define define_show_state_ull_function(_name) \
-static ssize_t show_state_##_name(struct cpuidle_state *state, char *buf) \
+static ssize_t show_state_##_name(struct cpuidle_state *state, struct cpuidle_state_usage *state_usage, char *buf) \
{ \
- return sprintf(buf, "%llu\n", state->_name);\
+ return sprintf(buf, "%llu\n", state_usage->_name);\
}

#define define_show_state_str_function(_name) \
-static ssize_t show_state_##_name(struct cpuidle_state *state, char *buf) \
+static ssize_t show_state_##_name(struct cpuidle_state *state, struct cpuidle_state_usage *state_usage, char *buf) \
{ \
if (state->_name[0] == '\0')\
return sprintf(buf, "<null>\n");\
@@ -269,16 +269,18 @@ static struct attribute *cpuidle_state_default_attrs[] = {

#define kobj_to_state_obj(k) container_of(k, struct cpuidle_state_kobj, kobj)
#define kobj_to_state(k) (kobj_to_state_obj(k)->state)
+#define kobj_to_state_usage(k) (kobj_to_state_obj(k)->state_usage)
#define attr_to_stateattr(a) container_of(a, struct cpuidle_state_attr, attr)
static ssize_t cpuidle_state_show(struct kobject * kobj,
struct attribute * attr ,char * buf)
{
int ret = -EIO;
struct cpuidle_state *state = kobj_to_state(kobj);
+ struct cpuidle_state_usage *state_usage = kobj_to_state_usage(kobj);
struct cpuidle_state_attr * cattr = attr_to_stateattr(attr);

if (cattr->show)
- ret = cattr->show(state, buf);
+ ret = cattr->show(state, state_usage, buf);

return ret;
}
@@ -323,6 +325,7 @@ int cpuidle_add_state_sysfs(struct cpuidle_device *device)
if (!kobj)
goto error_state;
kobj->state = &device->states[i];
+ kobj->state_usage = &device->states_usage[i];
init_completion(&kobj->kobj_unregister);

ret = kobject_init_and_add(&kobj->kobj, &ktype_state_cpuidle, &device->kobj,
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index add225c..4f92d96 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -109,7 +109,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C1 */
.name = "C1-NHM",
.desc = "MWAIT 0x00",
- .driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 3,
.target_residency = 6,
@@ -117,7 +116,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C2 */
.name = "C3-NHM",
.desc = "MWAIT 0x10",
- .driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 20,
.target_residency = 80,
@@ -125,7 +123,6 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C3 */
.name = "C6-NHM",
.desc = "MWAIT 0x20",
- .driver_data = (void *) 0x20,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 200,
.target_residency = 800,
@@ -137,7 +134,6 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C1 */
.name = "C1-SNB",
.desc = "MWAIT 0x00",
- .driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 1,
.target_residency = 1,
@@ -145,7 +141,6 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C2 */
.name = "C3-SNB",
.desc = "MWAIT 0x10",
- .driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 80,
.target_residency = 211,
@@ -153,7 +148,6 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C3 */
.name = "C6-SNB",
.desc = "MWAIT 0x20",
- .driver_data = (void *) 0x20,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 104,
.target_residency = 345,
@@ -161,7 +155,6 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C4 */
.name = "C7-SNB",
.desc = "MWAIT 0x30",
- .driver_data = (void *) 0x30,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 109,
.target_residency = 345,
@@ -173,7 +166,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C1 */
.name = "C1-ATM",
.desc = "MWAIT 0x00",
- .driver_data = (void *) 0x00,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 1,
.target_residency = 4,
@@ -181,7 +173,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C2 */
.name = "C2-ATM",
.desc = "MWAIT 0x10",
- .driver_data = (void *) 0x10,
.flags = CPUIDLE_FLAG_TIME_VALID,
.exit_latency = 20,
.target_residency = 80,
@@ -190,7 +181,6 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C4 */
.name = "C4-ATM",
.desc = "MWAIT 0x30",
- .driver_data = (void *) 0x30,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 100,
.target_residency = 400,
@@ -199,13 +189,43 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
{ /* MWAIT C6 */
.name = "C6-ATM",
.desc = "MWAIT 0x52",
- .driver_data = (void *) 0x52,
.flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
.exit_latency = 140,
.target_residency = 560,
.enter = &intel_idle },
};

+static int get_driver_data(int cstate)
+{
+ int driver_data;
+ switch (cstate) {
+
+ case 0: /* MWAIT C0 */
+ return -EINVAL;
+ case 1: /* MWAIT C1 */
+ driver_data = 0x00;
+ break;
+ case 2: /* MWAIT C2 */
+ driver_data = 0x10;
+ break;
+ case 3: /* MWAIT C3 */
+ driver_data = 0x20;
+ break;
+ case 4: /* MWAIT C4 */
+ driver_data = 0x30;
+ break;
+ case 5: /* MWAIT C5 */
+ driver_data = 0x40;
+ break;
+ case 6: /* MWAIT C6 */
+ driver_data = 0x52;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return driver_data;
+}
+
/**
* intel_idle
* @dev: cpuidle_device
@@ -216,7 +236,8 @@ static int intel_idle(struct cpuidle_device *dev, int index)
{
unsigned long ecx = 1; /* break on interrupt flag */
struct cpuidle_state *state = &dev->states[index];
- unsigned long eax = (unsigned long)cpuidle_get_statedata(state);
+ struct cpuidle_state_usage *state_usage = &dev->states_usage[index];
+ unsigned long eax = (unsigned long)cpuidle_get_statedata(state_usage);
unsigned int cstate;
ktime_t kt_before, kt_after;
s64 usec_delta;
@@ -259,8 +280,8 @@ static int intel_idle(struct cpuidle_device *dev, int index)

/* Update cpuidle counters */
dev->last_residency = (int)usec_delta;
- state->time += (unsigned long long)dev->last_residency;
- state->usage++;
+ state_usage->time += (unsigned long long)dev->last_residency;
+ state_usage->usage++;

return index;
}
@@ -453,6 +474,9 @@ static int intel_idle_cpuidle_devices_init(void)
dev->states[dev->state_count] = /* structure copy */
cpuidle_state_table[cstate];

+ dev->states_usage[dev->state_count].driver_data =
+ (void *)get_driver_data(cstate);
+
dev->state_count += 1;
}

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index a3306be..5a1a238 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -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;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/