Commit Graph

150 Commits

Author SHA1 Message Date
Chen Yu 1373718194 ACPI / PM: Introduce efi poweroff for HW-full platforms without _S5
The problem is Linux registers pm_power_off = efi_power_off only if
we are in hardware reduced mode. Actually, what we also want is to do
this when ACPI S5 is simply not supported on non-legacy platforms.
Since some future Intel platforms are HW-full mode where the DSDT
fails to supply an _S5 object(without SLP_TYP), we should let such
kind of platform to leverage efi runtime service to poweroff.

This patch uses efi power off as first choice when S5 is unavailable,
even if there is a customized poweroff(driver provided, eg).
Meanwhile, the legacy platforms will not be affected because there is
no path for them to overwrite the pm_power_off to efi power off.

Suggested-by: Len Brown <len.brown@intel.com>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-04-09 02:11:43 +02:00
Rafael J. Wysocki 3513ac743d Merge branches 'pm-avs', 'pm-clk', 'pm-devfreq' and 'pm-sleep'
* pm-avs:
  PM / AVS: rockchip-io: add io selectors and supplies for rk3399

* pm-clk:
  PM / clk: Add support for obtaining clocks from device-tree

* pm-devfreq:
  PM / devfreq: Spelling s/frequnecy/frequency/

* pm-sleep:
  ACPI / PM: Runtime resume devices when waking from hibernate
  PM / sleep: Clear pm_suspend_global_flags upon hibernate
2016-03-25 00:58:18 +01:00
Lukas Wunner fbda4b38fa ACPI / PM: Runtime resume devices when waking from hibernate
Commit 58a1fbbb2e ("PM / PCI / ACPI: Kick devices that might have been
reset by firmware") added a runtime resume for devices that were runtime
suspended when the system entered suspend-to-RAM.

Briefly, the motivation was to ensure that devices did not remain in a
reset-power-on state after resume, potentially preventing deep SoC-wide
low-power states from being entered on idle.

Currently we're not doing the same when leaving suspend-to-disk and this
asymmetry is a problem if drivers rely on the automatic resume triggered
by pm_complete_with_resume_check(). Fix it.

Fixes: 58a1fbbb2e (PM / PCI / ACPI: Kick devices that might have been reset by firmware)
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: 4.4+ <stable@vger.kernel.org> # 4.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-03-23 02:43:11 +01:00
Sudeep Holla 504997cf96 ACPI / sleep: move acpi_processor_sleep to sleep.c
acpi_processor_sleep is neither related nor used by CPUIdle framework.
It's used in system suspend/resume path as a syscore operation. It makes
more sense to move it to acpi/sleep.c where all the S-state transition
(a.k.a. Linux system suspend/hiberate) related code are present.

Also make it depend on CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT so that
it's not compiled on architecture like ARM64 where S-states are not
yet defined in ACPI.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-02-22 00:53:56 +01:00
Rafael J. Wysocki e3e9b577b4 ACPICA: Drop Linux-specific waking vector functions
Commit f06147f9fb (ACPICA: Hardware: Enable firmware waking vector
for both 32-bit and 64-bit FACS) added three functions that aren't
present in upstream ACPICA, acpi_hw_set_firmware_waking_vectors(),
acpi_set_firmware_waking_vectors() and acpi_set_firmware_waking_vector64(),
to allow Linux to use the previously existing API for setting the
platform firmware waking vector.

However, that wasn't necessary, since the ACPI sleep support code
in Linux can be modified to use the upstream ACPICA's API easily
and the additional functions may be dropped which reduces the code
size and puts the kernel's ACPICA code more in line with the upstream.

Make the changes as per the above.  While at it, make the relevant
function desctiption comments reflect the upstream ACPICA's ones.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Lv Zheng <lv.zheng@intel.com>
2016-01-04 22:05:20 +01:00
Rafael J. Wysocki 9bb4064ca3 Merge branch 'pm-sleep'
* pm-sleep:
  PM / hibernate: fix a comment typo
  input: i8042: Avoid resetting controller on system suspend/resume
  PM / PCI / ACPI: Kick devices that might have been reset by firmware
  PM / sleep: Add flags to indicate platform firmware involvement
  PM / sleep: Drop pm_request_idle() from pm_generic_complete()
  PCI / PM: Avoid resuming more devices during system suspend
  PM / wakeup: wakeup_source_create: use kstrdup_const
  PM / sleep: Report interrupt that caused system wakeup
2015-11-02 00:52:19 +01:00
Chen Yu 8c01275e0c ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle
For an ACPI compatible system, the SCI (ACPI System Control
Interrupt) is used to wake the system up from suspend-to-idle.
Once the CPU is woken up by the SCI, the interrupt handler will
first check if the current IRQ has been configured for system
wakeup, so irq_pm_check_wakeup() is invoked to validate the IRQ
number.  However, during suspend-to-idle, enable_irq_wake() is
called for acpi_gbl_FADT.sci_interrupt, although the IRQ number
that the SCI handler has been installed for should be passed to
it instead.  Thus, if acpi_gbl_FADT.sci_interrupt happens to be
different from that number, ACPI interrupts will not be able to
wake up the system from sleep.

Fix this problem by passing the IRQ number returned by
acpi_gsi_to_irq() to enable_irq_wake() instead of
acpi_gbl_FADT.sci_interrupt.

Cc: 3.18+ <stable@vger.kernel.org> # 3.18+
Acked-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-26 04:39:26 +01:00
Rafael J. Wysocki ef25ba0476 PM / sleep: Add flags to indicate platform firmware involvement
There are quite a few cases in which device drivers, bus types or
even the PM core itself may benefit from knowing whether or not
the platform firmware will be involved in the upcoming system power
transition (during system suspend) or whether or not it was involved
in it (during system resume).

For this reason, introduce global system suspend flags that can be
used by the platform code to expose that information for the benefit
of the other parts of the kernel and make the ACPI core set them
as appropriate.

Users of the new flags will be added later.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-14 02:17:33 +02:00
Chen Yu 7b02ccea2e ACPI / PM: Enable all wakeup GPEs in suspend-to-idle
Currently, in suspend-to-idle, wakeup GPE for PCI devices are
handled properly because acpi_pci_sleep_wake() invokes acpi_enable_gpe()
to enable the wakeup GPE directly. But for the other wakeup-capable
devices in ACPI bus, acpi_enable_wakeup_devices() should be invoked
to update enable_for_wake mask in gpe_register_info structure, thus
acpi_enable_all_wakeup_gpes() can enable the wakeup GPE referred in
_PRW methods. And acpi_disable_wakeup_devices() will be called
before disable_irq_wake() in acpi_freeze_restore() to restore the mask.

This patch fixes a power button wakeup problem on Surface Pro 3,
on which platform power button uses EC to deliver event
(EC GPE is referred in _PRW).

Note: enabling EC GPE during freeze state may bring some risks
because EC events are expected to fire more frequently than others.
Thus it may bring the system out of freeze state unnecessarily.
(We already have comments about this in bugzilla)

Link: https://bugzilla.kernel.org/show_bug.cgi?id=84651
Reported-and-tested-by: Ethan Schoonover <es@ethanschoonover.com>
Tested-by: Peter Amidon <psa.pub.0@picnicpark.org>
Tested-by: Yani Ioadnnou <yani.ioannou@gmail.com>
Tested-by: Mister Wardrop <mister.wardrop@gmail.com>
Tested-by: Anton Anikin <anton@anikin.name>
Tested-by: Keith McClelland <zismylaptop@gmail.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-30 01:52:02 +02:00
Rafael J. Wysocki b8ee29786f ACPI / sleep: Drop acpi_suspend() which is not used
The acpi_suspend() function has no callers, so drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
2015-03-18 12:53:21 +01:00
Jan Beulich 8b691c9cf2 ACPI / sleep: mark acpi_sleep_dmi_check() __init
This makes a difference if the compiler decides not to inline the
function, as then the function's reference to acpisleep_dmi_table[]
yields a section mismatch warning.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-01-23 22:10:16 +01:00
Rafael J. Wysocki c52fa70c79 ACPI / sleep: Drain outstanding events after disabling multiple GPEs
After multiple GPEs have been disabled at the low level in one go,
like when acpi_disable_all_gpes() is called, we should always drain
all of the outstanding events from them, or interesting races become
possible.

For this reason, call acpi_os_wait_events_complete() after
acpi_enable_all_wakeup_gpes() and acpi_disable_all_gpes() in
acpi_freeze_prepare() and acpi_power_off_prepare(), respectively.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-01 23:51:13 +01:00
Rafael J. Wysocki a8d46b9e4e ACPI / sleep: Rework the handling of ACPI GPE wakeup from suspend-to-idle
The ACPI GPE wakeup from suspend-to-idle is currently based on using
the IRQF_NO_SUSPEND flag for the ACPI SCI, but that is problematic
for a couple of reasons.  First, in principle the ACPI SCI may be
shared and IRQF_NO_SUSPEND does not really work well with shared
interrupts.  Second, it may require the ACPI subsystem to special-case
the handling of device notifications depending on whether or not
they are received during suspend-to-idle in some places which would
lead to fragile code.  Finally, it's better the handle ACPI wakeup
interrupts consistently with wakeup interrupts from other sources.

For this reason, remove the IRQF_NO_SUSPEND flag from the ACPI SCI
and use enable_irq_wake()/disable_irq_wake() with it instead, which
requires two additional platform hooks to be added to struct
platform_freeze_ops.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-30 21:06:07 +02:00
Lan Tianyu 821d6f0359 ACPI / sleep: Do not save NVS for new machines to accelerate S3
NVS region is saved and restored unconditionally for machines without
nvs_nosave quirk during S3. Tested some new machines and the operation
is not necessary. Saving NVS region also affects S2RAM speed. The time of
NVS saving and restoring depends on the size of NVS region and it consumes
7~10ms normally.

This patch is to make machines produced from 2012 to now not saving NVS region
to accelerate S3.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-07-24 01:03:18 +02:00
Todd E Brandt bb3632c610 PM / sleep: trace events for suspend/resume
Adds trace events that give finer resolution into suspend/resume. These
events are graphed in the timelines generated by the analyze_suspend.py
script. They represent large areas of time consumed that are typical to
suspend and resume.

The event is triggered by calling the function "trace_suspend_resume"
with three arguments: a string (the name of the event to be displayed
in the timeline), an integer (case specific number, such as the power
state or cpu number), and a boolean (where true is used to denote the start
of the timeline event, and false to denote the end).

The suspend_resume trace event reproduces the data that the machine_suspend
trace event did, so the latter has been removed.

Signed-off-by: Todd Brandt <todd.e.brandt@intel.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-06-07 00:18:07 +02:00
Rafael J. Wysocki 1f0b63866f ACPI / PM: Hold ACPI scan lock over the "freeze" sleep state
The "freeze" sleep state suffers from the same issue that was
addressed by commit ad07277e82 (ACPI / PM: Hold acpi_scan_lock over
system PM transitions) for ACPI sleep states, that is, things break
if ->remove() is called for devices whose system resume callbacks
haven't been executed yet.

It also can be addressed in the same way, by holding the ACPI scan
lock over the "freeze" sleep state and PM transitions to and from
that state, but ->begin() and ->end() platform operations for the
"freeze" sleep state are needed for this purpose.

This change has been tested on Acer Aspire S5 with Thunderbolt.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-16 12:18:27 +02:00
Rafael J. Wysocki fad16dd9c9 ACPI / PM: Export acpi_target_system_state() to modules
Export the acpi_target_system_state() function to modules so that
modular drivers can use it to check what the target ACPI sleep state
of the system is (that is needed for i915 mostly at this point).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-10 00:36:08 +02:00
Rafael J. Wysocki a4e90bed51 ACPI / sleep: Add extra checks for HW Reduced ACPI mode sleep states
If the HW Reduced ACPI mode bit is set in the FADT, ACPICA uses
the optional sleep control and sleep status registers for making
the system enter sleep states (including S5), so it is not possible
to use system sleep states or power it off using ACPI if the HW
Reduced ACPI mode bit is set and those registers are not available.

For this reason, add a new function, acpi_sleep_state_supported(),
checking if the HW Reduced ACPI mode bit is set and whether or not
system sleep states are usable in that case in addition to checking
the return value of acpi_get_sleep_type_data() and make the ACPI
sleep setup routines use that function to check the availability of
system sleep states.

Among other things, this prevents the kernel from attempting to
use ACPI for powering off HW Reduced ACPI systems without the sleep
control and sleep status registers, because ACPI power off doesn't
have a chance to work on them.  That allows alternative power off
mechanisms that may actually work to be used on those systems.  The
affected machines include Dell Venue 8 Pro, Asus T100TA, Haswell
Desktop SDP and Ivy Bridge EP Demo depot.

References: https://bugzilla.kernel.org/show_bug.cgi?id=70931
Reported-by: Adam Williamson <awilliam@redhat.com>
Tested-by: Aubrey Li <aubrey.li@linux.intel.com>
Cc: 3.4+ <stable@vger.kernel.org> # 3.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-03-13 22:11:39 +01:00
Rafael J. Wysocki 4c7b70406e Revert "ACPI / sleep: pm_power_off needs more sanity checks to be installed"
Revert commit 3130497f5b ("ACPI / sleep: pm_power_off needs more
sanity checks to be installed") that breaks power ACPI power off on a
lot of systems, because it checks wrong registers.

Fixes: 3130497f5b ("ACPI / sleep: pm_power_off needs more sanity checks to be installed")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-03-09 13:48:36 -07:00
Li, Aubrey 3130497f5b ACPI / sleep: pm_power_off needs more sanity checks to be installed
Sleep control and status registers need santity checks as well before
ACPI installs acpi_power_off to pm_power_off hook. The checking code in
acpi_enter_sleep_state() is too late, we should not allow a not-working
pm_power_off function to be hooked up.

Signed-off-by: Aubrey Li <aubrey.li@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-03-03 00:21:14 +01:00
Rafael J. Wysocki bcc7201a91 Merge branches 'acpi-gpe', 'acpi-video', 'acpi-thermal', 'acpi-processor', 'acpi-sleep'
* acpi-gpe:
  ACPI / EC: disable GPE before removing GPE handler
  ACPI / Button: Fix enabling button GPEs twice

* acpi-video:
  ACPI: Blacklist Win8 OSI for some HP laptop 2013 models
  ACPI / video: Fix typo in video_detect.c

* acpi-thermal:
  ACPI / thermal: remove const from thermal_zone_device_ops declaration

* acpi-processor:
  ACPI / scan: bail out early if failed to parse APIC ID for CPU

* acpi-sleep:
  ACPI / sleep: remove panic in case hardware has changed after S4
2014-01-12 23:46:55 +01:00
Rafael J. Wysocki 98feb7cc61 Merge branch 'acpi-cleanup'
* acpi-cleanup: (22 commits)
  ACPI / tables: Return proper error codes from acpi_table_parse() and fix comment.
  ACPI / tables: Check if id is NULL in acpi_table_parse()
  ACPI / proc: Include appropriate header file in proc.c
  ACPI / EC: Remove unused functions and add prototype declaration in internal.h
  ACPI / dock: Include appropriate header file in dock.c
  ACPI / PCI: Include appropriate header file in pci_link.c
  ACPI / PCI: Include appropriate header file in pci_slot.c
  ACPI / EC: Mark the function acpi_ec_add_debugfs() as static in ec_sys.c
  ACPI / NVS: Include appropriate header file in nvs.c
  ACPI / OSL: Mark the function acpi_table_checksum() as static
  ACPI / processor: initialize a variable to silence compiler warning
  ACPI / processor: use ACPI_COMPANION() to get ACPI device
  ACPI: correct minor typos
  ACPI / sleep: Drop redundant acpi_disabled check
  ACPI / dock: Drop redundant acpi_disabled check
  ACPI / table: Replace '1' with specific error return values
  ACPI: remove trailing whitespace
  ACPI / IBFT: Fix incorrect <acpi/acpi.h> inclusion in iSCSI boot firmware module
  ACPI / i915: Fix incorrect <acpi/acpi.h> inclusions via <linux/acpi_io.h>
  SFI / ACPI: Fix warnings reported during builds with W=1
  ...

Conflicts:
	drivers/acpi/nvs.c
	drivers/hwmon/asus_atk0110.c
2014-01-12 23:44:09 +01:00
Oliver Neukum 5c551e624a ACPI / sleep: remove panic in case hardware has changed after S4
Some BIOSes change hardware based on the state of
a laptop's lid. If the lid is closed, the touchpad is
disabled and the checksum changes. Windows 8 no longer
aborts resume if the checksum has changed.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
[rjw: Use pr_crit() for the message and don't break the string]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-01-11 01:39:10 +01:00
Hanjun Guo 100eb0b042 ACPI / sleep: Drop redundant acpi_disabled check
acpi_sleep_init() is only called from acpi_bus_init() and the
code logic shows that it doesn't need to check acpi_disabled:

acpi_init();
	if (acpi_disabled) return;
	acpi_bus_init();
		acpi_sleep_init();
			if (acpi_disabled)
				return 0;

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
[rjw: Subject and changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-07 01:36:32 +01:00
Lv Zheng 8b48463f89 ACPI: Clean up inclusions of ACPI header files
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and
<acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h>
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
<linux/acpi.h> includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that <acpi/acpi_bus.h> be included
prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the
latter depends on are always there.  And <acpi/acpi.h> which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
<linux/acpi.h> as appropriate.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-07 01:03:14 +01:00
Al Stone 51468a9d3a ACPI / sleep: clean up compiler warning about uninitialized field
Initialize pwr_btn_status as disabled which (a) makes sure it is
in a proper state to start, and (b) cleans up a compiler warning
about an uninitialized variable.

Signed-off-by: Al Stone <al.stone@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-21 01:44:43 +01:00
Rafael J. Wysocki 0c581415b5 Merge branch 'acpi-assorted'
* acpi-assorted:
  ACPI / osl: Kill macro INVALID_TABLE().
  earlycpio.c: Fix the confusing comment of find_cpio_data().
  ACPI / x86: Print Hot-Pluggable Field in SRAT.
  ACPI / thermal: Use THERMAL_TRIPS_NONE macro to replace number
  ACPI / thermal: Remove unused macros in the driver/acpi/thermal.c
  ACPI / thermal: Remove the unused lock of struct acpi_thermal
  ACPI / osl: Fix osi_setup_entries[] __initdata attribute location
  ACPI / numa: Fix __init attribute location in slit_valid()
  ACPI / dock: Fix __init attribute location in find_dock_and_bay()
  ACPI / Sleep: Fix incorrect placement of __initdata
  ACPI / processor: Fix incorrect placement of __initdata
  ACPI / EC: Fix incorrect placement of __initdata
  ACPI / scan: Drop unnecessary label from acpi_create_platform_device()
  ACPI: Move acpi_bus_get_device() from bus.c to scan.c
  ACPI / scan: Allow platform device creation without any IO resources
  ACPI: Cleanup sparse warning on acpi_os_initialize1()
  platform / thinkpad: Remove deprecated hotkey_report_mode parameter
  ACPI: Remove the old /proc/acpi/event interface
2013-08-27 01:29:04 +02:00
Rafael J. Wysocki ad07277e82 ACPI / PM: Hold acpi_scan_lock over system PM transitions
Bad things happen if ACPI hotplug events are handled during system
PM transitions, especially if devices are removed as a result.
To prevent those bad things from happening, acquire acpi_scan_lock
when a PM transition is started and release it when that transition
is complete or has been aborted.

This fixes resume lockup on my test-bed Acer Aspire S5 that happens
when Thunderbolt devices are disconnected from the machine while
suspended.

Also fixes the analogous problem for Mika Westerberg on an
Intel DZ77RE-75K board.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
2013-08-21 01:23:53 +02:00
Sachin Kamat 3e4376ffce ACPI / Sleep: Fix incorrect placement of __initdata
__initdata should be placed between the variable name and equal
sign for the variable to be placed in the intended section.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-08-07 23:49:29 +02:00
Jiang Liu 0db9820260 ACPI: introduce helper function acpi_execute_simple_method()
Introduce helper function acpi_execute_simple_method() and use it in
a number of places to simplify code.

[rjw: Changelog]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-07-15 01:33:10 +02:00
Konrad Rzeszutek Wilk d6a77ead21 x86 / ACPI / sleep: Provide registration for acpi_suspend_lowlevel.
Which by default will be x86_acpi_suspend_lowlevel.
This registration allows us to register another callback
if there is a need to use another platform specific callback.

Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Ben Guthro <benjamin.guthro@citrix.com>
Acked-by: "H. Peter Anvin" <hpa@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-19 23:36:30 +02:00
Fabio Valentini 469dd1c4ac ACPI / PM: fix suspend and resume on Sony Vaio VGN-FW21M
Add Sony Vaio VGN-FW21M to the device blacklist in
drivers/acpi/sleep.c.

Fixes suspend/resume on this device (device no longer reboots
instead of resuming).

References: https://bugzilla.kernel.org/show_bug.cgi?id=55001
Signed-off-by: Fabio Valentini <fafatheone@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-27 00:04:53 +01:00
Joe Perches ed4cf5b23f ACPI / Sleep: Avoid interleaved message on errors
Got this dmesg log on an Acer Aspire 725.

[    0.256351] ACPI: (supports S0ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20130117/hwxface-568)
[    0.256373] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20130117/hwxface-568)
[    0.256391]  S3 S4 S5)

Avoid this interleaving error messages.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-03-04 14:23:39 +01:00
Rafael J. Wysocki a68d35323b Merge branch 'acpi-assorted'
* acpi-assorted:
  ACPI: Add DMI entry for Sony VGN-FW41E_H
  ACPI: fix obsolete comment in custom_method.c
  ACPI / thermal: Use mode to enable/disable kernel thermal processing
  ACPI thermal: remove unnecessary newline from exception message
  ACPI sysfs: remove unnecessary newline from exception
  ACPI video: remove unnecessary newline from error messages
  ACPI: SRAT: report non-volatile memory in debug
  ACPI: Rework acpi_get_child() to be more efficient
2013-02-15 13:58:43 +01:00
Joseph Salisbury 66f2fda93b ACPI: Add DMI entry for Sony VGN-FW41E_H
This patch adds a quirk to allow the Sony VGN-FW41E_H to suspend/resume
properly.

References: http://bugs.launchpad.net/bugs/1113547
Signed-off-by: Joseph Salisbury <joseph.salisbury@canonical.com>
Cc: All <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-02-06 13:14:24 +01:00
Rafael J. Wysocki 02040f0bba ACPI / PM: Consolidate suspend-specific and hibernate-specific code
Move some suspend-specific and hibernate-specific code from
acpi_sleep_init() into separate functions to get rid of explicit
#ifdefs in acpi_sleep_init().  Use pr_info() to start and pr_cont()
to continue printing the supported ACPI sleep states line.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-01-19 22:09:23 +01:00
Rafael J. Wysocki 781d737c74 ACPI: Drop power resources driver
The ACPI power resources driver is not very useful, because the only
thing it really does is to restore the state of the power resources
that were "on" before system suspend or hibernation, but that may be
achieved in a different way.

Drop the ACPI power resources driver entirely and add
acpi_resume_power_resources() that will walk the list of all
registered power resources during system resume and turn on the ones
that were "on" before the preceding system suspend or hibernation.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-01-17 14:11:06 +01:00
Rafael J. Wysocki 6b728f1a90 Merge branch 'acpi-general'
* acpi-general:
  ACPI / PNP: Do not crash due to stale pointer use during system resume
  ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist
  ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set
2012-12-04 13:46:08 +01:00
Zhang Rui 0ac1b1d7b7 ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set
The current acpisleep DMI checks only run when CONFIG_SUSPEND is set.
And this may break hibernation on some platforms when CONFIG_SUSPEND
is cleared.

Move acpisleep DMI check into #ifdef CONFIG_ACPI_SLEEP instead.

[rjw: Added acpi_sleep_dmi_check() and rebased on top of earlier
 patches adding entries to acpisleep_dmi_table[].]
References: https://bugzilla.kernel.org/show_bug.cgi?id=45921
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-30 12:57:03 +01:00
Rafael J. Wysocki d4c091f13d Merge branch 'acpi-general'
* acpi-general: (38 commits)
  ACPI / thermal: _TMP and _CRT/_HOT/_PSV/_ACx dependency fix
  ACPI: drop unnecessary local variable from acpi_system_write_wakeup_device()
  ACPI: Fix logging when no pci_irq is allocated
  ACPI: Update Dock hotplug error messages
  ACPI: Update Container hotplug error messages
  ACPI: Update Memory hotplug error messages
  ACPI: Update CPU hotplug error messages
  ACPI: Add acpi_handle_<level>() interfaces
  ACPI: remove use of __devexit
  ACPI / PM: Add Sony Vaio VPCEB1S1E to nonvs blacklist.
  ACPI / battery: Correct battery capacity values on Thinkpads
  Revert "ACPI / x86: Add quirk for "CheckPoint P-20-00" to not use bridge _CRS_ info"
  ACPI: create _SUN sysfs file
  ACPI / memhotplug: bind the memory device when the driver is being loaded
  ACPI / memhotplug: don't allow to eject the memory device if it is being used
  ACPI / memhotplug: free memory device if acpi_memory_enable_device() failed
  ACPI / memhotplug: fix memory leak when memory device is unbound from acpi_memhotplug
  ACPI / memhotplug: deal with eject request in hotplug queue
  ACPI / memory-hotplug: add memory offline code to acpi_memory_device_remove()
  ACPI / memory-hotplug: call acpi_bus_trim() to remove memory device
  ...

Conflicts:
	include/linux/acpi.h (two additions at the end of the same file)
2012-11-29 21:43:06 +01:00
Lan Tianyu 876ab79055 ACPI / PM: Add Sony Vaio VPCEB1S1E to nonvs blacklist.
Sony Vaio VPCEB1S1E does not resume correctly without
acpi_sleep=nonvs, so add it to the ACPI sleep blacklist.

References: https://bugzilla.kernel.org/show_bug.cgi?id=48781
Reported-by: Sébastien Wilmet <swilmet@gnome.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-21 23:12:12 +01:00
Kristen Carlson Accardi 1bad2f19f7 ACPI / Sleep: add acpi_sleep=nonvs_s3 parameter
The ACPI specificiation would like us to save NVS at hibernation time,
but makes no mention of saving NVS over S3.  Not all versions of
Windows do this either, and it is clear that not all machines need NVS
saved/restored over S3.  Allow the user to improve their suspend/resume
time by disabling the NVS save/restore at S3 time, but continue to do
the NVS save/restore for S4 as specified.

Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:16:02 +01:00
Rafael J. Wysocki a6ae7594b1 ACPI / PM: Move device PM functions related to sleep states
Introduce helper function returning the target sleep state of the
system and use it to move the remaining device power management
functions from sleep.c to device_pm.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:15:18 +01:00
Rafael J. Wysocki dee8370cc8 ACPI / PM: Split device wakeup management routines
Two device wakeup management routines in device_pm.c and sleep.c,
acpi_pm_device_run_wake() and acpi_pm_device_sleep_wake(), take a
device pointer argument and use it to obtain the ACPI handle of the
corresponding ACPI namespace node.  That handle is then used to get
the address of the struct acpi_device object corresponding to the
struct device passed as the argument.

Unfortunately, that last operation may be costly, because it involves
taking the global ACPI namespace mutex, so it shouldn't be carried
out too often.  However, the callers of those routines usually call
them in a row with acpi_pm_device_sleep_state() which also takes that
mutex for the same reason, so it would be more efficient if they ran
acpi_bus_get_device() themselves to obtain a pointer to the struct
acpi_device object in question and then passed that pointer to the
appropriate PM routines.

To make that possible, split each of the PM routines mentioned above
in two parts, one taking a struct acpi_device pointer argument and
the other implementing the current interface for compatibility.

Additionally, change acpi_pm_device_run_wake() to actually return
an error code if there is an error while setting up runtime remote
wakeup for the device.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:15:17 +01:00
Rafael J. Wysocki cd7bd02d31 ACPI / PM: Move runtime remote wakeup setup routine to device_pm.c
The ACPI function for setting up devices to do runtime remote
wakeup is now located in drivers/acpi/sleep.c, but
drivers/acpi/device_pm.c is a more logical place for it, so move it
there.

No functional changes should result from this modification.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:15:17 +01:00
Rafael J. Wysocki 86b3832c64 ACPI / PM: Move device power state selection routine to device_pm.c
The ACPI function for choosing device power state is now located
in drivers/acpi/sleep.c, but drivers/acpi/device_pm.c is a more
logical place for it, so move it there.

However, instead of moving the function entirely, move its core only
under a different name and with a different list of arguments, so
that it is more flexible, and leave a wrapper around it in the
original location.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:15:16 +01:00
Rafael J. Wysocki bdda27fb98 ACPI / PM: Fix device PM kernedoc comments and #ifdefs
The kerneldoc comments for acpi_pm_device_sleep_state(),
acpi_pm_device_run_wake(), and acpi_pm_device_sleep_wake() are
outdated or otherwise inaccurate and/or don't follow the common
kerneldoc patterns, so fix them.

Additionally, notice that acpi_pm_device_run_wake() should be under
CONFIG_PM_RUNTIME rather than under CONFIG_PM_SLEEP, so fix that too.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-15 00:15:16 +01:00
Rafael J. Wysocki 8b713a88cc PM / ACPI: Take device PM QoS flags into account
Make ACPI power management routines and PCI power management
routines depending on ACPI take device PM QoS flags into account
when deciding what power state to put the device into.

In particular, after this change acpi_pm_device_sleep_state() will
not return ACPI_STATE_D3_COLD as the deepest available low-power
state if PM_QOS_FLAG_NO_POWER_OFF is requested for the device and it
will not require remote wakeup to work for the device in the returned
low-power state if there is at least one PM QoS flags request for the
device, but PM_QOS_FLAG_REMOTE_WAKEUP is not requested for it.

Accordingly, acpi_pci_set_power_state() will refuse to put the
device into D3cold if PM_QOS_FLAG_NO_POWER_OFF is requested for it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Huang Ying <ying.huang@intel.com>
2012-10-24 02:08:38 +02:00
Len Brown 9d0b01a1bb Merge branches 'delete-gts-bfs', 'misc', 'novell-bugzilla-757888-numa' and 'osc-pcie' into base 2012-08-03 00:31:23 -04:00
Len Brown 3f6f49c785 ACPI: delete _GTS/_BFS support
_GTS and _BFS were added to the suspend/resume flow
in the ACPI 2.0 specification.

Linux dutifully implemented _GTS and _BFS.
We discovered that it was rarely seen in systems
in the field.  Further, some of those systems had
AML so bogus that it could never work -- proof that
no other operating system supports _GTS and _BFS.
So we made _GTS and _BFS optional via modparam,
and disabled them by default.

But we've had to complicate some code to keep
this support in the kernel, as these methods are defined
to be evaluated very close to sleep entry and exit.
Indeed, no other AML is ever evaluated with interrupts off.

We have submitted a proposal for _GTS and _BFS
to be officially removed from the ACPI specification
on the next revision.  Here we remove it from Linux.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-07-30 21:11:25 -04:00