a decoded range for an ACPI Host-PCI bridge, try to allocate it from the
ACPI system resource range. If that works, permit the resource allocation
regardless.
MFC after: 1 week
ACPI Device() objects that do not have any device IDs available via the
_HID or _CID methods. Without a device ID a device driver cannot attach
to the device anyway. Namespace objects that are devices but not of
type ACPI_TYPE_DEVICE are not affected.
A few BIOSes have also attached a _CRS method to a PCI device to
allocate resources that are not managed via a BAR. With the previous
code those resources are allocated from acpi0 directly which can interfere
with the new PCI-PCI bridge driver (since the PCI device in question may
be behind a bridge and its resources should be allocated from that
bridge's windows instead). The resources were also orphaned and
and would end up associated with some other random device whose device_t
reused the pointer of the original ACPI-enumerated device (after it was
free'd by the ACPI PCI bus driver) in devinfo output which was confusing.
If we want to handle _CRS on PCI devices we can adjust the ACPI PCI bus
driver to do that in the future and associate the resources with the
proper device object respecting PCI-PCI bridges, etc.
Note that with this change the ACPI PCI bus driver no longer has to
delete ACPI-enumerated device_t devices that mirror PCI devices since
they should in general not exist. There are rare cases when a BIOS
will give a PCI device a _HID (e.g. I've seen a PCI-ISA bridge given
a _HID for a system resource device). In that case we leave both the
ACPI and PCI-enumerated device_t objects around just as in the previous
code.
table is present, then the acpi_ec(4) driver will allocate its resources
from nexus0 before the acpi0 device reserves resources for child devices.
Reviewed by: jkim
'hw.acpi.remove_interface'. hw.acpi.install_interface lets you install new
interfaces. Conversely, hw.acpi.remove_interface lets you remove OS
interfaces from the pre-defined list in ACPICA. For example,
hw.acpi.install_interface="FreeBSD"
lets _OSI("FreeBSD") method to return 0xffffffff (or success) and
hw.acpi.remove_interface="Windows 2009"
lets _OSI("Windows 2009") method to return zero (or failure). Both are
comma-separated lists and leading white spaces are ignored. For example,
the following examples are valid:
hw.acpi.install_interface="Linux, FreeBSD"
hw.acpi.remove_interface="Windows 2006, Windows 2006.1"
added with hw.pci.do_powerstate but the PCI version was splitted into two
separate tunables later and now this is completely stale. To make it worse,
PCI devices enumerated in ACPI tree ignore this tunable as it is handled by
a function in acpi_pci.c instead.
knowledges from the file. All PCI devices enumerated in ACPI tree must use
correct one from acpi_pci.c any way. Reduce duplicate codes as we did for
pci.c in r213905. Do not return ESRCH from PCIB_POWER_FOR_SLEEP method.
When the method is not found, just return zero without modifying the given
default value as it is completely optional. As a side effect, the return
state must not be NULL. Note there is actually no functional change by
removing ESRCH because acpi_pcib_power_for_sleep() always returns zero.
Adjust debugging messages and add new ones under bootverbose to help
debugging device power state related issues.
Reviewed by: jhb, imp (earlier versions)
address spaces
There has been no need to do that starting with ACPICA 20040427 as
AcpiEnableSubsystem() installs the handlers automatically.
Additionaly, explicitly calling AcpiInstallAddressSpaceHandler before
AcpiEnableSubsystem is not supported by ACPICA and leads to too early
execution of _REG methods in some DSDTs, which may result in problems.
Big thanks to Robert Moore of ACPICA/Intel for explaining the above.
Reported by: Daniel Bilik <daniel.bilik@neosystem.cz>
Tested by: Daniel Bilik <daniel.bilik@neosystem.cz>
Reviewed by: jkim
Suggested by: "Moore, Robert" <robert.moore@intel.com>
MFC after: 1 week
This reflects actual type used to store and compare child device orders.
Change is mostly done via a Coccinelle (soon to be devel/coccinelle)
semantic patch.
Verified by LINT+modules kernel builds.
Followup to: r212213
MFC after: 10 days
method is used by the PCI bus driver to query the power management system
to determine the proper device state to be used for a device during suspend
and resume. For the ACPI PCI bridge drivers this calls
acpi_device_pwr_for_sleep(). This removes ACPI-specific knowledge from
the PCI and PCI-PCI bridge drivers.
Reviewed by: jkim
device, make sure we have no real HPET device entry with same ID.
As side effect, it potentially allows several HPETs to be attached.
Use first of them for timecounting, rest (if ever present) could later
be used as event sources.
Setting the new sysctl MIB "debug.acpi.enable_debug_objects" to a non-zero
value enables us to print Debug object when something is written to it.
- Allow users to disable interpreter slack mode. Setting the new tunable
"debug.acpi.interpreter_slack" to zero disables some workarounds for common
BIOS mistakes and enables strict ACPI implementations by the specification.
It is belived that that pass s not needed anymore.
Specifically it is not required now for the reasons that were given
in the removed comment.
Discussed with: jhb
MFC after: 4 weeks
Some current systems dynamically load SSDT(s) when _PDC/_OSC method
of Processor is evaluated. Other devices in ACPI namespace may access
objects defined in the dynamic SSDT. Drivers for such devices might
have to have a rather high priority, because of other dependencies.
Good example is acpi_ec driver for EC.
Thus we attach to Processors as early as possible to load the SSDTs
before any other drivers may try to evaluate control methods.
It also seems to be a natural order for a processor in a device
hierarchy.
On the other hand, some child devices on acpi cpu bus need to access
other system resources like PCI configuration space of chipset devices,
so they need to be probed and attached rather late.
For this reason we probe and attach the cpu bus at
SI_SUB_CONFIGURE:SI_ORDER_MIDDLE SYSINIT level.
In the future this could be done more elegantly via multipass.
Please note that acpi drivers that might access ACPI namespace from
device_identify will do that before _PDC/_OSC of Processors are evaluated.
Legacy cpu driver is not affected by this change.
PR: kern/142561 (in part)
Reviewed by: jhb
Silence from: acpi@
MFC after: 5 weeks
o acpi_hpet: auto-added 'wildcard' devices can be identified by
non-NULL handle attribute.
o acpi_ec: auto-add 'wildcard' devices can be identified by
unset (NULL) private attribute.
o acpi_cpu: use private instead of magic to store cpu id.
Reviewed by: jhb
Silence from: acpi@
MFC after: 2 weeks
X-MFC-Note: perhaps the ivar should stay for ABI stability
startup and genericize it so it can be reused to map other tables as well:
- Add a routine to walk a list of ACPI subtables such as those used in the
APIC and SRAT tables in the MI acpi(4) driver.
- Move the routines for mapping and unmapping an ACPI table as well as
mapping the RSDT or XSDT and searching for a table with a given signature
out into acpica_machdep.c for both amd64 and i386.
BIOS-enumerated devices:
- Assume a device is a match if the memory and I/O ports match even if the
IRQ or DRQ is wrong or missing. Some BIOSes don't include an IRQ for
the atrtc device for example.
- Add a hack to better match floppy controller devices. Many BIOSes do not
include the starting port of the floppy controller listed in the hints
(0x3f0) in the resources for the device. So far, however, all the BIOS
variations encountered do include the 'port + 2' resource (0x3f2), so
adjust the matching for "fdc" devices to look for 'port + 2'.
Reviewed by: imp
MFC after: 3 days
The newbus lock is responsible for protecting newbus internIal structures,
device states and devclass flags. It is necessary to hold it when all
such datas are accessed. For the other operations, softc locking should
ensure enough protection to avoid races.
Newbus lock is automatically held when virtual operations on the device
and bus are invoked when loading the driver or when the suspend/resume
take place. For other 'spourious' operations trying to access/modify
the newbus topology, newbus lock needs to be automatically acquired and
dropped.
For the moment Giant is also acquired in some key point (modules subsystem)
in order to avoid problems before the 8.0 release as module handlers could
make assumptions about it. This Giant locking should go just after
the release happens.
Please keep in mind that the public interface can be expanded in order
to provide more support, if there are really necessities at some point
and also some bugs could arise as long as the patch needs a bit of
further testing.
Bump __FreeBSD_version in order to reflect the newbus lock introduction.
Reviewed by: ed, hps, jhb, imp, mav, scottl
No answer by: ariff, thompsa, yongari
Tested by: pho,
G. Trematerra <giovanni dot trematerra at gmail dot com>,
Brandon Gooch <jamesbrandongooch at gmail dot com>
Sponsored by: Yahoo! Incorporated
Approved by: re (ksmith)
- Probe supported sleep states from acpi_attach() just once and do not
call AcpiGetSleepTypeData() again. It is redundant because
AcpiEnterSleepStatePrep() does it any way.
- Treat UNKNOWN sleep state as NONE, i.e., "do nothing", and remove obscure
NONE state (ACPI_S_STATES_MAX + 1) to avoid confusions.
- Do not set unsupported sleep states as default button/switch events.
If the default sleep state is not supported, just set it as UNKNOWN/NONE.
- Do not allow sleep state change if the system is not fully up and running.
This should prevent entering S5 state multiple times, which causes strange
behaviours later.
- Make sleep states case-insensitive when they are used with sysctl(8).
For example,
sysctl hw.acpi.lid_switch_state=s1
sysctl hw.acpi.sleep_button_state=none
are now legal and equivalent to the uppercase ones.
This change adds (possibly redundant) early check for invalid
state input parameter (including S0). Handling of S5 request
is reduced to simply calling shutdown_nice(). As a result
control flow of acpi_EnterSleepState is somewhat simplified
and resume/backout half of the function is not executed
for S5 (soft poweroff) request and invalid state requests.
Note: it seems that shutdown_nice may act as nop when initproc
is already initialized (to grab pid of 1), but init process is in
"pre-natal" state.
Tested by: Fabian Keil <fk@fabiankeil.de>
Reviewed by: njl, jkim
Approved by: rpaulo
