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: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

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outdated or otherwise inaccurate and/or don't follow the common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: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

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: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: NJean Pihet <j-pihet@ti.com>
Reviewed-by: NHuang Ying <ying.huang@intel.com>

_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: NLen Brown <len.brown@intel.com>
Acked-by: NIngo Molnar <mingo@kernel.org>
Acked-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

If CONFIG_ACPI_SLEEP is unset, the compiler complains that
pwr_btn_event_pending is defined but not used.  To silence the
warning, move the definition of pwr_btn_event_pending under an
appropriate #ifdef.
Reported-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Tested-by: NPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

ATA port may support runtime D3Cold state, for example, Zero-power ODD case.
This patch adds wakeup notifier and enable/disable run_wake during
supend/resume.
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Lower device sleep state can save more power, but has more exit
latency too.  Sometimes, to satisfy some power QoS and other
requirement, we need to constrain the lowest device sleep state.

In this patch, a parameter to specify lowest allowed state for
acpi_pm_device_sleep_state is added.  So that the caller can enforce
the constraint via the parameter.

This is needed by PCIe D3cold support, where the lowest power state
allowed may be D3_HOT instead of default D3_COLD.

CC: Len Brown <lenb@kernel.org>
CC: linux-acpi@vger.kernel.org
Reviewed-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NHuang Ying <ying.huang@intel.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

Remove the unused argument of acpi_os_wait_events_complete.
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Revert usage of acpi_wakeup_address and move definition
to x86 architecture code in order to make compilation work
in ia64.

[jsakkine: tested compilation in ia64/x86-64 and added
proper commit message]
Reported-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Originally-by: NH. Peter Anvin <hpa@kernel.org>
Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1338370421-27735-1-git-send-email-jarkko.sakkinen@intel.com
Cc: Tony Luck <tony.luck@intel.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>

The comparison between the system sleep state being entered
and the lowest system sleep state the given device may wake up
from in acpi_pm_device_sleep_state() is reversed, because the
specification (ACPI 5.0) says that for wakeup to work:

"The sleeping state being entered must be less than or equal to the
 power state declared in element 1 of the _PRW object."

In other words, the state returned by _PRW is the deepest
(lowest-power) system sleep state the device is capable of waking up
the system from.

Moreover, acpi_pm_device_sleep_state() also should check if the
wakeup capability is supported through ACPI, because in principle it
may be done via native PCIe PME, for example, in which case _SxW
should not be evaluated.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

When the system is woken up by the ACPI fixed power button, currently there
is no way of userspace becoming aware that the power button was pressed.

OLPC would like to know this, so that we can respond appropriately.
For example, if the system was woken up by a network packet, we know
we can go back to sleep very quickly. But if the user explicitly woke the
system with the power button, we're going to want to stay awake for a
while.

The wakeup count mechanism seems like a good fit for communicating this.
Mark the fixed power button as wakeup-enabled, and increment its wakeup
counter when the system is woken with the power button. (The wakeup counter
is also incremented when the power button is pressed during system
operation; this is already handled by an existing acpi-button codepath).
Signed-off-by: NDaniel Drake <dsd@laptop.org>
Acked-by: NZhang Rui <rui.zhang@intel.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Replaced copying of real_mode_header with a pointer
to beginning of RM memory.
Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-19-git-send-email-jarkko.sakkinen@intel.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

Migrated ACPI wakeup code to the real-mode blob.
Code existing in .x86_trampoline  can be completely
removed. Static descriptor table in wakeup_asm.S is
courtesy of H. Peter Anvin.
Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-7-git-send-email-jarkko.sakkinen@intel.com
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>

Cc: Len Brown <lenb@kernel.org>
Signed-off-by: NKay Sievers <kay@vrfy.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

With commit a2ef5c4f
"ACPI: Move module parameter gts and bfs to sleep.c" the wake_sleep_flags
is required when calling acpi_enter_sleep_state, which means
that if there are functions outside the sleep.c code they
can't get the wake_sleep_flags values.

This converts the function in to a exported value and converts
the module config operands to a function.
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NLin Ming <ming.m.lin@intel.com>
[v2: Parameters can be turned on/off dynamically]
[v3: unsigned char -> u8]
[v4: val -> kp->arg]
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/r/1335150198-21899-2-git-send-email-konrad.wilk@oracle.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

acpi_dev_run_wake() is a generic function which can be used by
other subsystem too. Rename it to acpi_pm_device_run_wake, to be
consistent with acpi_pm_device_sleep_wake.

Then move it to ACPI core.
Acked-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Move linux specific module parameter gts and bfs out of ACPICA core
code to sleep.c.
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Enhanced the sleep/wake interfaces to optionally execute the
_GTS method (Going To Sleep), and the _BFS method (Back From
Sleep).  Windows apparently does not execute these methods, and
therefore these methods are often untested. It has been seen on
some systems where the execution of these methods causes errors
and also prevents the machine from entering S5. It is therefore
suggested that host operating systems do not execute these methods
by default. In the future, perhaps these methods can be optionally
executed based on the age of the system and/or what is the newest
version of Windows that the BIOS asks for via _OSI.
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Changed the METHOD_NAME* defines that define a full pathname to
the method to METHOD_PATHNAME* in order to make it clear that
it is not a simple 4-character ACPI name. Used for the various
sleep/wake methods.
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Sony Vaio VPCCW29FX does not resume correctly without
acpi_sleep=nonvs, so add it to the ACPI sleep blacklist.

https://bugzilla.kernel.org/show_bug.cgi?id=34722Signed-off-by: NLan Tianyu <tianyu.lan@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

The models do not resume correctly without acpi_sleep=nonvs.
Signed-off-by: NKeng-Yu Lin <kengyu@canonical.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Another entry for the nonvs blacklist, as noted by a user in
https://bugzilla.redhat.com/show_bug.cgi?id=641789#c12Signed-off-by: NDave Jones <davej@redhat.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

As noted by a user in https://bugzilla.redhat.com/show_bug.cgi?id=641789
The Sony VGN-FW21E also needs the nonvs by default workaround added.
Signed-off-by: NDave Jones <davej@redhat.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Sony Vaio VGN-FW520F 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=16396#c86Signed-off-by: NBogdan Radulescu <bogdan@nimblex.net>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Apparently, Sony Vaio VGN-SR26GN_P 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=16396#c91Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

DMI workaround for A8N-SLI Premium and A8N-SLI DELUXE
to enable the s3 suspend old ordering.
http://bugzilla.kernel.org/show_bug.cgi?id=9528Tested-by: NHeiko Ettelbrück <hbruckynews@gmx.de>
Tested-by: NBrian Beardall <brian@rapsure.net>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

After redefining CONFIG_PM to depend on (CONFIG_PM_SLEEP ||
CONFIG_PM_RUNTIME) the CONFIG_PM_OPS option is redundant and can be
replaced with CONFIG_PM.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

The function acpi_hibernation_enter() is always called with
interrupts off, so it doesn't need to switch them off and on.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

The function do_suspend_lowlevel() is specific to x86 and defined in
assembly code, so it should be called from the x86 low-level suspend
code rather than from acpi_suspend_enter().

Merge do_suspend_lowlevel() into the x86's acpi_save_state_mem() and
change the name of the latter to acpi_suspend_lowlevel(), so that the
function's purpose is better reflected by its name.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Since acpi_save_state_mem() is only called by acpi_suspend_enter()
if the target sleep state is S3, it's better to call it under the
switch (acpi_state), right before do_suspend_lowlevel().
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Move the low-level resume completion message to the point where
control goes back to acpi_suspend_enter() during resume and change
it so that it's more informative.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

The function acpi_suspend_enter() is always called with interrupts
off, so it doesn't need to switch them off and on.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

The function acpi_restore_state_mem() has never been and most likely
never will be used, so remove it.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Use the unified trampoline allocation setup to allocate and install
the ACPI wakeup code in low memory.
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>

It turns out that some device drivers map pages from the ACPI NVS region
during resume using ioremap(), which conflicts with ioremap_cache() used
for mapping those pages by the NVS save/restore code in nvs.c.

Make the NVS pages mapped by the code in nvs.c be unmapped before device
drivers' resume routines run.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Apparently, Averatec AV1020-ED2 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=16396#c86Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLen Brown <len.brown@intel.com>

When ioremap() fails (which might happen for some reason), we nicely
oops in suspend_nvs_save() due to NULL dereference by memcpy() in there.
Fail gracefully instead.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: NLen Brown <len.brown@intel.com>

The saving of the NVS memory area during suspend and restoring it
during resume causes problems to appear on Sony Vaio VGN-NW130D, so
blacklist that machine to avoid those problems.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=23002Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Reported-and-tested-by: NAdriano <adriano.vilela@yahoo.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

While at it, fix two checkpatch errors.
Several non-const struct instances constified by this patch were added after
the introduction of platform_suspend_ops in checkpatch.pl's list of "should
be const" structs (79404849).

Patch against mainline.
Inspired by hunks of the grsecurity patch, updated for newer kernels.
Signed-off-by: NLionel Debroux <lionel_debroux@yahoo.fr>
Acked-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>