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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-11-06 13:54:47 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-11-06 13:54:47 +0100
commit69a10ca747c2d2d7c0354a883335e097c067ed35 (patch)
treea8b1f56f95af55a4d9bd826b7e5e6d31b8cd6b98 /drivers
parent96428e98aebe5db8a164711f102808651c7f518d (diff)
parenta192aa923b66a435aae56983c4912ee150bc9b32 (diff)
downloadlinux-69a10ca747c2d2d7c0354a883335e097c067ed35.tar.bz2
Merge branch 'acpi-pm' into pm-core
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/Kconfig5
-rw-r--r--drivers/acpi/Makefile1
-rw-r--r--drivers/acpi/acpi_lpit.c162
-rw-r--r--drivers/acpi/acpi_lpss.c78
-rw-r--r--drivers/acpi/device_pm.c65
-rw-r--r--drivers/acpi/internal.h6
-rw-r--r--drivers/acpi/osl.c42
-rw-r--r--drivers/acpi/scan.c1
-rw-r--r--drivers/base/power/domain.c4
-rw-r--r--drivers/base/power/sysfs.c28
10 files changed, 252 insertions, 140 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 1ce52f84dc23..4bfef0f78cde 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -80,6 +80,11 @@ endif
config ACPI_SPCR_TABLE
bool
+config ACPI_LPIT
+ bool
+ depends on X86_64
+ default y
+
config ACPI_SLEEP
bool
depends on SUSPEND || HIBERNATION
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 90265ab4437a..6a19bd7aba21 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -56,6 +56,7 @@ acpi-$(CONFIG_DEBUG_FS) += debugfs.o
acpi-$(CONFIG_ACPI_NUMA) += numa.o
acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
acpi-y += acpi_lpat.o
+acpi-$(CONFIG_ACPI_LPIT) += acpi_lpit.o
acpi-$(CONFIG_ACPI_GENERIC_GSI) += irq.o
acpi-$(CONFIG_ACPI_WATCHDOG) += acpi_watchdog.o
diff --git a/drivers/acpi/acpi_lpit.c b/drivers/acpi/acpi_lpit.c
new file mode 100644
index 000000000000..e94e478dd18b
--- /dev/null
+++ b/drivers/acpi/acpi_lpit.c
@@ -0,0 +1,162 @@
+
+/*
+ * acpi_lpit.c - LPIT table processing functions
+ *
+ * Copyright (C) 2017 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/cpu.h>
+#include <linux/acpi.h>
+#include <asm/msr.h>
+#include <asm/tsc.h>
+
+struct lpit_residency_info {
+ struct acpi_generic_address gaddr;
+ u64 frequency;
+ void __iomem *iomem_addr;
+};
+
+/* Storage for an memory mapped and FFH based entries */
+static struct lpit_residency_info residency_info_mem;
+static struct lpit_residency_info residency_info_ffh;
+
+static int lpit_read_residency_counter_us(u64 *counter, bool io_mem)
+{
+ int err;
+
+ if (io_mem) {
+ u64 count = 0;
+ int error;
+
+ error = acpi_os_read_iomem(residency_info_mem.iomem_addr, &count,
+ residency_info_mem.gaddr.bit_width);
+ if (error)
+ return error;
+
+ *counter = div64_u64(count * 1000000ULL, residency_info_mem.frequency);
+ return 0;
+ }
+
+ err = rdmsrl_safe(residency_info_ffh.gaddr.address, counter);
+ if (!err) {
+ u64 mask = GENMASK_ULL(residency_info_ffh.gaddr.bit_offset +
+ residency_info_ffh.gaddr. bit_width - 1,
+ residency_info_ffh.gaddr.bit_offset);
+
+ *counter &= mask;
+ *counter >>= residency_info_ffh.gaddr.bit_offset;
+ *counter = div64_u64(*counter * 1000000ULL, residency_info_ffh.frequency);
+ return 0;
+ }
+
+ return -ENODATA;
+}
+
+static ssize_t low_power_idle_system_residency_us_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u64 counter;
+ int ret;
+
+ ret = lpit_read_residency_counter_us(&counter, true);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%llu\n", counter);
+}
+static DEVICE_ATTR_RO(low_power_idle_system_residency_us);
+
+static ssize_t low_power_idle_cpu_residency_us_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u64 counter;
+ int ret;
+
+ ret = lpit_read_residency_counter_us(&counter, false);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%llu\n", counter);
+}
+static DEVICE_ATTR_RO(low_power_idle_cpu_residency_us);
+
+int lpit_read_residency_count_address(u64 *address)
+{
+ if (!residency_info_mem.gaddr.address)
+ return -EINVAL;
+
+ *address = residency_info_mem.gaddr.address;
+
+ return 0;
+}
+
+static void lpit_update_residency(struct lpit_residency_info *info,
+ struct acpi_lpit_native *lpit_native)
+{
+ info->frequency = lpit_native->counter_frequency ?
+ lpit_native->counter_frequency : tsc_khz * 1000;
+ if (!info->frequency)
+ info->frequency = 1;
+
+ info->gaddr = lpit_native->residency_counter;
+ if (info->gaddr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+ info->iomem_addr = ioremap_nocache(info->gaddr.address,
+ info->gaddr.bit_width / 8);
+ if (!info->iomem_addr)
+ return;
+
+ /* Silently fail, if cpuidle attribute group is not present */
+ sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,
+ &dev_attr_low_power_idle_system_residency_us.attr,
+ "cpuidle");
+ } else if (info->gaddr.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
+ /* Silently fail, if cpuidle attribute group is not present */
+ sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj,
+ &dev_attr_low_power_idle_cpu_residency_us.attr,
+ "cpuidle");
+ }
+}
+
+static void lpit_process(u64 begin, u64 end)
+{
+ while (begin + sizeof(struct acpi_lpit_native) < end) {
+ struct acpi_lpit_native *lpit_native = (struct acpi_lpit_native *)begin;
+
+ if (!lpit_native->header.type && !lpit_native->header.flags) {
+ if (lpit_native->residency_counter.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY &&
+ !residency_info_mem.gaddr.address) {
+ lpit_update_residency(&residency_info_mem, lpit_native);
+ } else if (lpit_native->residency_counter.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE &&
+ !residency_info_ffh.gaddr.address) {
+ lpit_update_residency(&residency_info_ffh, lpit_native);
+ }
+ }
+ begin += lpit_native->header.length;
+ }
+}
+
+void acpi_init_lpit(void)
+{
+ acpi_status status;
+ u64 lpit_begin;
+ struct acpi_table_lpit *lpit;
+
+ status = acpi_get_table(ACPI_SIG_LPIT, 0, (struct acpi_table_header **)&lpit);
+
+ if (ACPI_FAILURE(status))
+ return;
+
+ lpit_begin = (u64)lpit + sizeof(*lpit);
+ lpit_process(lpit_begin, lpit_begin + lpit->header.length);
+}
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 97b753dd2e6e..04d32bdb5a95 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -713,43 +713,9 @@ static int acpi_lpss_activate(struct device *dev)
static void acpi_lpss_dismiss(struct device *dev)
{
- acpi_dev_runtime_suspend(dev);
+ acpi_dev_suspend(dev, false);
}
-#ifdef CONFIG_PM_SLEEP
-static int acpi_lpss_suspend_late(struct device *dev)
-{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
- int ret;
-
- ret = pm_generic_suspend_late(dev);
- if (ret)
- return ret;
-
- if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
- acpi_lpss_save_ctx(dev, pdata);
-
- return acpi_dev_suspend_late(dev);
-}
-
-static int acpi_lpss_resume_early(struct device *dev)
-{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
- int ret;
-
- ret = acpi_dev_resume(dev);
- if (ret)
- return ret;
-
- acpi_lpss_d3_to_d0_delay(pdata);
-
- if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
- acpi_lpss_restore_ctx(dev, pdata);
-
- return pm_generic_resume_early(dev);
-}
-#endif /* CONFIG_PM_SLEEP */
-
/* IOSF SB for LPSS island */
#define LPSS_IOSF_UNIT_LPIOEP 0xA0
#define LPSS_IOSF_UNIT_LPIO1 0xAB
@@ -835,19 +801,15 @@ static void lpss_iosf_exit_d3_state(void)
mutex_unlock(&lpss_iosf_mutex);
}
-static int acpi_lpss_runtime_suspend(struct device *dev)
+static int acpi_lpss_suspend(struct device *dev, bool wakeup)
{
struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
int ret;
- ret = pm_generic_runtime_suspend(dev);
- if (ret)
- return ret;
-
if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
acpi_lpss_save_ctx(dev, pdata);
- ret = acpi_dev_runtime_suspend(dev);
+ ret = acpi_dev_suspend(dev, wakeup);
/*
* This call must be last in the sequence, otherwise PMC will return
@@ -860,7 +822,7 @@ static int acpi_lpss_runtime_suspend(struct device *dev)
return ret;
}
-static int acpi_lpss_runtime_resume(struct device *dev)
+static int acpi_lpss_resume(struct device *dev)
{
struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
int ret;
@@ -881,7 +843,37 @@ static int acpi_lpss_runtime_resume(struct device *dev)
if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
acpi_lpss_restore_ctx(dev, pdata);
- return pm_generic_runtime_resume(dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int acpi_lpss_suspend_late(struct device *dev)
+{
+ int ret = pm_generic_suspend_late(dev);
+
+ return ret ? ret : acpi_lpss_suspend(dev, device_may_wakeup(dev));
+}
+
+static int acpi_lpss_resume_early(struct device *dev)
+{
+ int ret = acpi_lpss_resume(dev);
+
+ return ret ? ret : pm_generic_resume_early(dev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static int acpi_lpss_runtime_suspend(struct device *dev)
+{
+ int ret = pm_generic_runtime_suspend(dev);
+
+ return ret ? ret : acpi_lpss_suspend(dev, true);
+}
+
+static int acpi_lpss_runtime_resume(struct device *dev)
+{
+ int ret = acpi_lpss_resume(dev);
+
+ return ret ? ret : pm_generic_runtime_resume(dev);
}
#endif /* CONFIG_PM */
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 764b8dfa04aa..17e8eb93a76c 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -581,8 +581,7 @@ static int acpi_dev_pm_get_state(struct device *dev, struct acpi_device *adev,
d_min = ret;
wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
&& adev->wakeup.sleep_state >= target_state;
- } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) !=
- PM_QOS_FLAGS_NONE) {
+ } else {
wakeup = adev->wakeup.flags.valid;
}
@@ -848,38 +847,39 @@ static int acpi_dev_pm_full_power(struct acpi_device *adev)
}
/**
- * acpi_dev_runtime_suspend - Put device into a low-power state using ACPI.
+ * acpi_dev_suspend - Put device into a low-power state using ACPI.
* @dev: Device to put into a low-power state.
+ * @wakeup: Whether or not to enable wakeup for the device.
*
- * Put the given device into a runtime low-power state using the standard ACPI
+ * Put the given device into a low-power state using the standard ACPI
* mechanism. Set up remote wakeup if desired, choose the state to put the
* device into (this checks if remote wakeup is expected to work too), and set
* the power state of the device.
*/
-int acpi_dev_runtime_suspend(struct device *dev)
+int acpi_dev_suspend(struct device *dev, bool wakeup)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
- bool remote_wakeup;
+ u32 target_state = acpi_target_system_state();
int error;
if (!adev)
return 0;
- remote_wakeup = dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) >
- PM_QOS_FLAGS_NONE;
- if (remote_wakeup) {
- error = acpi_device_wakeup_enable(adev, ACPI_STATE_S0);
+ if (wakeup && acpi_device_can_wakeup(adev)) {
+ error = acpi_device_wakeup_enable(adev, target_state);
if (error)
return -EAGAIN;
+ } else {
+ wakeup = false;
}
- error = acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0);
- if (error && remote_wakeup)
+ error = acpi_dev_pm_low_power(dev, adev, target_state);
+ if (error && wakeup)
acpi_device_wakeup_disable(adev);
return error;
}
-EXPORT_SYMBOL_GPL(acpi_dev_runtime_suspend);
+EXPORT_SYMBOL_GPL(acpi_dev_suspend);
/**
* acpi_dev_resume - Put device into the full-power state using ACPI.
@@ -912,7 +912,7 @@ EXPORT_SYMBOL_GPL(acpi_dev_resume);
int acpi_subsys_runtime_suspend(struct device *dev)
{
int ret = pm_generic_runtime_suspend(dev);
- return ret ? ret : acpi_dev_runtime_suspend(dev);
+ return ret ? ret : acpi_dev_suspend(dev, true);
}
EXPORT_SYMBOL_GPL(acpi_subsys_runtime_suspend);
@@ -931,41 +931,6 @@ int acpi_subsys_runtime_resume(struct device *dev)
EXPORT_SYMBOL_GPL(acpi_subsys_runtime_resume);
#ifdef CONFIG_PM_SLEEP
-/**
- * acpi_dev_suspend_late - Put device into a low-power state using ACPI.
- * @dev: Device to put into a low-power state.
- *
- * Put the given device into a low-power state during system transition to a
- * sleep state using the standard ACPI mechanism. Set up system wakeup if
- * desired, choose the state to put the device into (this checks if system
- * wakeup is expected to work too), and set the power state of the device.
- */
-int acpi_dev_suspend_late(struct device *dev)
-{
- struct acpi_device *adev = ACPI_COMPANION(dev);
- u32 target_state;
- bool wakeup;
- int error;
-
- if (!adev)
- return 0;
-
- target_state = acpi_target_system_state();
- wakeup = device_may_wakeup(dev) && acpi_device_can_wakeup(adev);
- if (wakeup) {
- error = acpi_device_wakeup_enable(adev, target_state);
- if (error)
- return error;
- }
-
- error = acpi_dev_pm_low_power(dev, adev, target_state);
- if (error && wakeup)
- acpi_device_wakeup_disable(adev);
-
- return error;
-}
-EXPORT_SYMBOL_GPL(acpi_dev_suspend_late);
-
static bool acpi_dev_needs_resume(struct device *dev, struct acpi_device *adev)
{
u32 sys_target = acpi_target_system_state();
@@ -1048,7 +1013,7 @@ EXPORT_SYMBOL_GPL(acpi_subsys_suspend);
int acpi_subsys_suspend_late(struct device *dev)
{
int ret = pm_generic_suspend_late(dev);
- return ret ? ret : acpi_dev_suspend_late(dev);
+ return ret ? ret : acpi_dev_suspend(dev, device_may_wakeup(dev));
}
EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late);
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 4361c4415b4f..fc8c43e76707 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -248,4 +248,10 @@ void acpi_watchdog_init(void);
static inline void acpi_watchdog_init(void) {}
#endif
+#ifdef CONFIG_ACPI_LPIT
+void acpi_init_lpit(void);
+#else
+static inline void acpi_init_lpit(void) { }
+#endif
+
#endif /* _ACPI_INTERNAL_H_ */
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index db78d353bab1..3bb46cb24a99 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -663,6 +663,29 @@ acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
EXPORT_SYMBOL(acpi_os_write_port);
+int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width)
+{
+
+ switch (width) {
+ case 8:
+ *(u8 *) value = readb(virt_addr);
+ break;
+ case 16:
+ *(u16 *) value = readw(virt_addr);
+ break;
+ case 32:
+ *(u32 *) value = readl(virt_addr);
+ break;
+ case 64:
+ *(u64 *) value = readq(virt_addr);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
acpi_status
acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
{
@@ -670,6 +693,7 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
unsigned int size = width / 8;
bool unmap = false;
u64 dummy;
+ int error;
rcu_read_lock();
virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
@@ -684,22 +708,8 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
if (!value)
value = &dummy;
- switch (width) {
- case 8:
- *(u8 *) value = readb(virt_addr);
- break;
- case 16:
- *(u16 *) value = readw(virt_addr);
- break;
- case 32:
- *(u32 *) value = readl(virt_addr);
- break;
- case 64:
- *(u64 *) value = readq(virt_addr);
- break;
- default:
- BUG();
- }
+ error = acpi_os_read_iomem(virt_addr, value, width);
+ BUG_ON(error);
if (unmap)
iounmap(virt_addr);
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 602f8ff212f2..81367edc8a10 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2122,6 +2122,7 @@ int __init acpi_scan_init(void)
acpi_int340x_thermal_init();
acpi_amba_init();
acpi_watchdog_init();
+ acpi_init_lpit();
acpi_scan_add_handler(&generic_device_handler);
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index e8ca5e2cf1e5..e6414e9998bb 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -346,9 +346,7 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
enum pm_qos_flags_status stat;
- stat = dev_pm_qos_flags(pdd->dev,
- PM_QOS_FLAG_NO_POWER_OFF
- | PM_QOS_FLAG_REMOTE_WAKEUP);
+ stat = dev_pm_qos_flags(pdd->dev, PM_QOS_FLAG_NO_POWER_OFF);
if (stat > PM_QOS_FLAGS_NONE)
return -EBUSY;
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 156ab57bca77..29bf28fef136 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -309,33 +309,6 @@ static ssize_t pm_qos_no_power_off_store(struct device *dev,
static DEVICE_ATTR(pm_qos_no_power_off, 0644,
pm_qos_no_power_off_show, pm_qos_no_power_off_store);
-static ssize_t pm_qos_remote_wakeup_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
- & PM_QOS_FLAG_REMOTE_WAKEUP));
-}
-
-static ssize_t pm_qos_remote_wakeup_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t n)
-{
- int ret;
-
- if (kstrtoint(buf, 0, &ret))
- return -EINVAL;
-
- if (ret != 0 && ret != 1)
- return -EINVAL;
-
- ret = dev_pm_qos_update_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP, ret);
- return ret < 0 ? ret : n;
-}
-
-static DEVICE_ATTR(pm_qos_remote_wakeup, 0644,
- pm_qos_remote_wakeup_show, pm_qos_remote_wakeup_store);
-
#ifdef CONFIG_PM_SLEEP
static const char _enabled[] = "enabled";
static const char _disabled[] = "disabled";
@@ -671,7 +644,6 @@ static const struct attribute_group pm_qos_latency_tolerance_attr_group = {
static struct attribute *pm_qos_flags_attrs[] = {
&dev_attr_pm_qos_no_power_off.attr,
- &dev_attr_pm_qos_remote_wakeup.attr,
NULL,
};
static const struct attribute_group pm_qos_flags_attr_group = {