different "platforms" on x86 machines. The existing code already handles
having two platforms: ACPI and legacy. However, the existing approach was
rather hardcoded and difficult to extend. These changes take the approach
that each x86 hardware platform should provide its own nexus(4) driver (it
can inherit most of its behavior from the default legacy nexus(4) driver)
which is responsible for probing for the platform and performing
appropriate platform-specific setup during attach (such as adding a
platform-specific bus device). This does mean changing the x86 platform
busses to no longer use an identify routine for probing, but to move that
logic into their matching nexus(4) driver instead.
- Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the
legacy platform. It's probe routine now returns BUS_PROBE_GENERIC so it
can be overriden.
- Expose a nexus_init_resources() routine which initializes the various
resource managers so that subclassed nexus(4) drivers can invoke it from
their attach routine.
- The legacy nexus(4) driver explicitly adds a legacy0 device in its
attach routine.
- The ACPI driver no longer contains an new-bus identify method. Instead
it exposes a public function (acpi_identify()) which is a probe routine
that the MD nexus(4) drivers can use to probe for ACPI. All of the
probe logic in acpi_probe() is now moved into acpi_identify() and
acpi_probe() is just a stub.
- On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via
acpi_identify() and claims the nexus0 device if the probe succeeds. It
then explicitly adds an acpi0 device in its attach routine.
- The legacy(4) driver no longer knows anything about the acpi0 device.
- On ia64 if acpi_identify() fails you basically end up with no devices.
This matches the previous behavior where the old acpi_identify() would
fail to add an acpi0 device again leaving you with no devices.
Discussed with: imp
Silence on: arch@
the cpufreq drivers to reliably use properties of PCI devices for quirks,
etc.
- For the legacy drivers, add CPU devices via an identify routine in the
CPU driver itself rather than in the legacy driver's attach routine.
- Add CPU devices after Host-PCI bridges in the acpi bus driver.
- Change the ichss(4) driver to use pci_find_bsf() to locate the ICH and
check its device ID rather than having a bogus PCI attachment that only
checked for the ID in probe and always failed. As a side effect, you
can now kldload ichss after boot.
- Fix the ichss(4) driver to use the correct device_t for the ICH (and not
for ichss0) when doing PCI config space operations to enable SpeedStep.
MFC after: 2 weeks
Reviewed by: njl, Andriy Gapon avg of icyb.net.ua
of directly from acpi0. Before it would attach prior to the sysresource
devices, causing the later allocation of its memory range to fail and
print a warning like "acpi0: reservation of fed00000, 1000 (3) failed".
Use an explicit define for our probe order base value of 10.
Help from: jhb
Tested by: Abdullah Ibn Hamad Al-Marri <almarrie / gmail.com>
MFC after: 3 days
Approved by: re
switch (i.e. lid) is set to have an action of NONE. This is not an
invalid state, so silently return. This fixes the warning:
"acpi: request to enter state S6 failed (err 22)"
Approved by: re
Improvements:
* /etc/rc.suspend,rc.resume are always run, no matter the source of the
suspend request (user or kernel, apm or acpi)
* suspend now requires positive user acknowledgement. If a user program
wants to cancel the suspend, they can. If one of the user programs
hangs or doesn't respond within 10 seconds, the system suspends anyway.
* /dev/apm is clonable, allowing multiple listeners for suspend events.
In the future, xorg-server can use this to be informed about suspend
even if there are other listeners (i.e. apmd).
Changes:
* Two new ACPI ioctls: REQSLPSTATE and ACKSLPSTATE. Request begins the
process of suspending by notifying all listeners. acpi is monitored by
devd(8) and /dev/apm listener(s) are also counted. Users register their
approval or disapproval via Ack. If anyone disapproves, suspend is vetoed.
* Old user programs or kernel modules that used SETSLPSTATE continue to
work. A message is printed once that this interface is deprecated.
* acpiconf gains the -k flag to ack the suspend request. This flag is
undocumented on purpose since it's only used by /etc/rc.suspend. It is
not intended to be a permanent change and will be removed once a better
power API is implemented.
* S5 (power off) is no longer supported via acpiconf -s 5 or apm -z/-Z.
This restores previous behavior of halt/shutdown -p being the interface.
* Miscellaneous improvements to error reporting
Approved by: re
back in a simulated resume instead of entering the requested suspend state.
This helps in testing drivers separately from the acpi suspend code. To
test your drivers, set debug.acpi.suspend_bounce=1 and then run
acpiconf -s3 (or 4).
MFC after: 1 day
specific request and thus should first try to be allocated from the
sys_resource pool. This avoids using the sys_resource pool for wildcard
requests that have bounded ranges coming from cbb(4) and Host-PCI pcib(4)
drivers.
Tested by: Andrea Bittau <a.bittau of cs.ucl.ac.uk fame>
Sleuthing by: Andrea Bittau as well
simpler. It now can just use rman_is_region_manager() during
acpi_release_resource() to see if the the resource is suballocated from
a system resource. Also, the driver no longer needs MD knowledge about
how to setup bus space tags and handles when doing a suballocation, but
can simply rely on bus_activate_resource() in the parent setting all that
up.
modern dual-core systems as well.
- Parse the _CST packages for each cpu and track all the states individually,
on a per-cpu basis.
- Revert to generic FADT/P_BLK based Cx control if the _CST package
is not present on all cpus. In that case, the new driver will
still support per-cpu Cx state handling. The driver will determine the
highest Cx level that can be supported by all the cpus and configure the
available Cx state based on that.
- Fixed the case where multiple cpus in the system share the same
registers for Cx state handling. To do that, added a new flag
parameter to the acpi_PkgGas and acpi_bus_alloc_gas functions that
enable the caller to add the RF_SHAREABLE flag. This flag could also be
useful to other callers (acpi_throttle?) in the tree but this change is
not yet made.
- For Core Duo cpus, both cores seems to be taken out of C3 state when
any one of the cores need to transition out. This broke the short sleep
detection logic. It is disabled now if there is more than one cpu in
the system for now as it fixed it in my case. This quirk may need to
be re-enabled later differently.
- Added support to control cx_lowest on a per-cpu basis. There is still
a generic cx_lowest to enable changing cx_lowest for all cpus with a single
sysctl and for ease of use. Sample output for the new sysctl:
dev.cpu.0.cx_supported: C1/1 C2/1 C3/57
dev.cpu.0.cx_lowest: C3
dev.cpu.0.cx_usage: 0.00% 43.16% 56.83%
dev.cpu.1.cx_supported: C1/1 C2/1 C3/57
dev.cpu.1.cx_lowest: C3
dev.cpu.1.cx_usage: 0.00% 45.65% 54.34%
hw.acpi.cpu.cx_lowest: C3
This work was done by Stephane E. Potvin with some simple reworking by
myself. Thank you.
Submitted by: Stephane E. Potvin <sepotvin / videotron.ca>
MFC after: 2 weeks
perform the reboot action via the reset register instead of our legacy
method. Default is 0 (use legacy). This is needed because some systems
hang on reboot even though they claim to support the reset register.
MFC after: 2 days
systems. Introduce a new sysctl "hw.acpi.disable_on_reboot" that allows
users to re-enable the old behavior in case it's needed for some systems.
We never disable in the power-off path.
Original approach submitted by Alexander Logvinov <abuse@akavia.ru> with
reworking by Jung-uk Kim and myself.
If the embedded controller exists before the sysresource devices, for
example, it will be attached first. Instead, let the normal device
order function work as we first desired. [1]
There still remained a problem where we couldn't allocate resources in
acpi0 that were passed up by the sysresource pseudo-devices. These
devices had to probe/attach first to give their resources to acpi, then
acpi would allocate them before probing/attaching other devices. To
work around this, we attach them from acpi_sysres_alloc(). A better
approach would be to implement multi-pass probe/attach in newbus but
that's a much bigger task.
Suggested by: jhb [1]
Hardware from: Centaur Technologies
MFC after: 1 week
systems (blade servers). On most systems, this is implemented as an IO
write to the SMI port and the BIOS generates the actual reset.
PR: kern/94939
Submitted by: dodell@ixsystems.com
Reviewed by: jhb
MFC after: 3 weeks
acpi_resource change was a minor nit offered as an early candidate for
the recent ACPICA import problem and the acpi.c change is one I need to
test still that makes the ordered probing of system devices actually work
as advertised (probe devices in order based on the type of device rather
than in the order we encounter them in the device tree).
entry that is not zero, assume that it is really a hard-wired IRQ (commonly
used for APIC routing) and not a source index. In practice, we've only
ever seen source indices of 0 for legitimate non-hard-wired _PRT entries.
Reviewed by: njl
Tested by: Alex Lyashkov shadow at psoft dot net
MFC after: 2 weeks
the driver has unholy private knowledge of its great-*cgrandchildren.
The ACPI allocation routine lacked such knowledge when it tried to do
a default allocation for all descendants, rather than just its
immeidate children, so would access grandchild's ivar in an unsafe
way. This could lead to a panic when devices were present which had
no addresses setup by the BIOS, but which were later allocated in a
lazy manner via pci_alloc_map. As such, only do the default
allocation adjustments for immediate children. The manner that
acpi_sysres_find accesses the resource list, used later in
acpi_alloc_resource, is safe and proper so no additional test is
needed there.
This fixes a panic when probing an disabled ata controller on some
newer intel blades.
Reported by: dwhite
pointer. If kernel malloc(0) returns a valid pointer, it needs to be
freed. If it returns NULL, it's ok to free this also.
Submitted by: pjd
Reviewed by: imp, dfr
Obtained from: Coverity Prevent
of swi. This allows us to use the taskqueue_thread_* functions instead of
rolling our own. It also avoids a double trip through the queue.
Submitted by: njl
Reviewed by: sam
we start turning any of them back on again. This works around a bug in
some BIOSen that alias two different link devices for APIC vs ATPIC modes
onto the same physical hardware link.
Submitted by: njl
Tested by: Antoine Brodin antoine dot brodin at laposte dot net
acpi_bus_alloc_gas() to delete the resource it set if alloc fails. Then,
change acpi_perf to delete the resource after releasing it if alloc fails.
This should make probe and attach both fully restartable if either fails.
type. This is needed if the resource is to be released later. The RID is
still also present, though less necessary since rman_get_rid() can be used
to obtain it from the resource.
