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powerpc/pseries/cpuidle: Move processor_idle.c to drivers/cpuidle. 

Move the file from arch specific pseries/processor_idle.c
to drivers/cpuidle/cpuidle-pseries.c
Make the relevant Makefile and Kconfig changes.
Also, introduce Kconfig.powerpc in drivers/cpuidle
for all powerpc cpuidle drivers.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Deepthi Dharwar 2014-01-14 16:26:02 +05:30 committed by Benjamin Herrenschmidt
parent d765ff23e3
commit 962e7bd497
7 changed files with 78 additions and 15 deletions
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2
arch/powerpc/include/asm/processor.h
View File

@ -451,7 +451,7 @@ enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
extern int powersave_nap; /* set if nap mode can be used in idle loop */
extern void power7_nap(void);
#ifdef CONFIG_PSERIES_IDLE
#ifdef CONFIG_PSERIES_CPUIDLE
extern void update_smt_snooze_delay(int cpu, int residency);
#else
static inline void update_smt_snooze_delay(int cpu, int residency) {}

9
arch/powerpc/platforms/pseries/Kconfig
View File

@ -119,12 +119,3 @@ config DTL
which are accessible through a debugfs file.
Say N if you are unsure.
config PSERIES_IDLE
bool "Cpuidle driver for pSeries platforms"
depends on CPU_IDLE
depends on PPC_PSERIES
default y
help
Select this option to enable processor idle state management
through cpuidle subsystem.

1
arch/powerpc/platforms/pseries/Makefile
View File

@ -21,7 +21,6 @@ obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_DTL) += dtl.o
obj-$(CONFIG_IO_EVENT_IRQ) += io_event_irq.o
obj-$(CONFIG_PSERIES_IDLE) += processor_idle.o
obj-$(CONFIG_LPARCFG) += lparcfg.o
ifeq ($(CONFIG_PPC_PSERIES),y)

5
drivers/cpuidle/Kconfig
View File

@ -35,6 +35,11 @@ depends on ARM
source "drivers/cpuidle/Kconfig.arm"
endmenu
menu "POWERPC CPU Idle Drivers"
depends on PPC
source "drivers/cpuidle/Kconfig.powerpc"
endmenu
endif
config ARCH_NEEDS_CPU_IDLE_COUPLED

11
drivers/cpuidle/Kconfig.powerpc Normal file
View File

@ -0,0 +1,11 @@
#
# POWERPC CPU Idle Drivers
#
config PSERIES_CPUIDLE
bool "Cpuidle driver for pSeries platforms"
depends on CPU_IDLE
depends on PPC_PSERIES
default y
help
Select this option to enable processor idle state management
through cpuidle subsystem.

4
drivers/cpuidle/Makefile
View File

@ -13,3 +13,7 @@ obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o
obj-$(CONFIG_ARM_ZYNQ_CPUIDLE) += cpuidle-zynq.o
obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o
obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o
###############################################################################
# POWERPC drivers
obj-$(CONFIG_PSERIES_CPUIDLE) += cpuidle-pseries.o

61
arch/powerpc/platforms/pseries/processor_idle.c → drivers/cpuidle/cpuidle-pseries.c
View File

@ -1,5 +1,5 @@
/*
* processor_idle - idle state cpuidle driver.
* cpuidle-pseries - idle state cpuidle driver.
* Adapted from drivers/idle/intel_idle.c and
* drivers/acpi/processor_idle.c
*
@ -27,6 +27,7 @@ struct cpuidle_driver pseries_idle_driver = {
#define MAX_IDLE_STATE_COUNT 2
static int max_idle_state = MAX_IDLE_STATE_COUNT - 1;
static struct cpuidle_device __percpu *pseries_cpuidle_devices;
static struct cpuidle_state *cpuidle_state_table;
static inline void idle_loop_prolog(unsigned long *in_purr)
@ -187,7 +188,7 @@ static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n,
{
int hotcpu = (unsigned long)hcpu;
struct cpuidle_device *dev =
per_cpu_ptr(cpuidle_devices, hotcpu);
per_cpu_ptr(pseries_cpuidle_devices, hotcpu);
if (dev && cpuidle_get_driver()) {
switch (action) {
@ -244,6 +245,50 @@ static int pseries_cpuidle_driver_init(void)
return 0;
}
/* pseries_idle_devices_uninit(void)
* unregister cpuidle devices and de-allocate memory
*/
static void pseries_idle_devices_uninit(void)
{
int i;
struct cpuidle_device *dev;
for_each_possible_cpu(i) {
dev = per_cpu_ptr(pseries_cpuidle_devices, i);
cpuidle_unregister_device(dev);
}
free_percpu(pseries_cpuidle_devices);
return;
}
/* pseries_idle_devices_init()
* allocate, initialize and register cpuidle device
*/
static int pseries_idle_devices_init(void)
{
int i;
struct cpuidle_driver *drv = &pseries_idle_driver;
struct cpuidle_device *dev;
pseries_cpuidle_devices = alloc_percpu(struct cpuidle_device);
if (pseries_cpuidle_devices == NULL)
return -ENOMEM;
for_each_possible_cpu(i) {
dev = per_cpu_ptr(pseries_cpuidle_devices, i);
dev->state_count = drv->state_count;
dev->cpu = i;
if (cpuidle_register_device(dev)) {
printk(KERN_DEBUG \
"cpuidle_register_device %d failed!\n", i);
return -EIO;
}
}
return 0;
}
/*
* pseries_idle_probe()
* Choose state table for shared versus dedicated partition
@ -279,12 +324,19 @@ static int __init pseries_processor_idle_init(void)
return retval;
pseries_cpuidle_driver_init();
retval = cpuidle_register(&pseries_idle_driver, NULL);
retval = cpuidle_register_driver(&pseries_idle_driver);
if (retval) {
printk(KERN_DEBUG "Registration of pseries driver failed.\n");
return retval;
}
retval = pseries_idle_devices_init();
if (retval) {
pseries_idle_devices_uninit();
cpuidle_unregister_driver(&pseries_idle_driver);
return retval;
}
register_cpu_notifier(&setup_hotplug_notifier);
printk(KERN_DEBUG "pseries_idle_driver registered\n");
@ -295,7 +347,8 @@ static void __exit pseries_processor_idle_exit(void)
{
unregister_cpu_notifier(&setup_hotplug_notifier);
cpuidle_unregister(&pseries_idle_driver);
pseries_idle_devices_uninit();
cpuidle_unregister_driver(&pseries_idle_driver);
return;
}