- Rename pciereg_cfgopen() to pcie_cfgregopen() and expose it to the
rest of the kernel. It now also accepts parameters via function
arguments rather than global variables.
- Add a notion of minimum and maximum bus numbers and reject requests for
an out of range bus.
- Add more range checks on slot/func/reg/bytes parameters to the cfg reg
read/write routines. Don't panic on any invalid parameters, just fail
the request (writes do nothing, reads return -1). This matches the
behavior of the other cfg mechanisms.
- Port the memory mapped configuration space access to amd64. On amd64
we simply use the direct map (via pmap_mapdev()) for the memory mapped
window.
- During acpi_attach() just after loading the ACPI tables, check for a
MCFG table. If it exists, call pciereg_cfgopen() on each subtable
(memory mapped window). For now we only support windows for domain 0
that start with bus 0. This removes the need for more chipset-specific
quirks in the MD code.
- Remove the chipset-specific quirks for the Intel 5000P/V/Z chipsets
since these machines should all have MCFG tables via ACPI.
- Updated pci_cfgregopen() to DTRT if ACPI had invoked pcie_cfgregopen()
earlier.
MFC after: 2 weeks
behavior. Specifically, probe Host-PCI bridges in the order they are
encountered in the tree. For CPUs, just use an order of 100000 and assume
that no Host-PCI bridges will be more than 10000 levels deep in the
namespace. This fixes an issue on some boxes where the HPET timer stopped
attaching.
assumptions about the state of the cooling devices. Instead, switch them
off on init and, only after that, we are in TZ_ACTIVE_NONE.
Submited by: Andriy Gapon <avg at icyb.net.ua>
Reviewed by: njl
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
the appropriate bit in the DEVACTB register.
This change allows the C2 state on those systems to work as expected.
Reviewed by: njl
Submitted by: Andriy Gapon <avg at icyb.net.ua>
MFC after: 1 week
spec:
- Use read/modify/write cycles to enable and disable the HPET instead of
writing 0 to reserved bits.
- Shutdown the HPET during suspend as encouraged by the spec.
- Fail to attach to an HPET with a period of zero.
MFC after: 1 week
PR: kern/119675 [3]
Reported by: Leo Bicknell | bicknell ufp.org
zone code. The GPE handler method (i.e. _L00) generates various Notify
events that need to be run to completion before the GPE is re-enabled.
In ACPI-CA, we queue an asynch callback at the same priority as a Notify
so that it will only run after all Notify handlers have completed. The
callback re-enables the GPE afterwards. We also changed the priority of
Notifies to be the same as GPEs, given the possibility that another GPE
could arrive before the Notifies have completed and we don't want it to
get queued ahead of the rest.
The ACPI-CA change was submitted by Alexey Starikovskiy (SUSE) and will
appear in a later release. Special thanks to him for helping track this
bug down.
MFC after: 1 week
Tested by: jhb, Yousif Hassan <yousif / alumni.jmu.edu>
correct number of acpi_thermalX devices. Having this wrong caused the
acpi_thermal thread to realloc the array of devices on each loop iteration.
MFC after: 1 week
PR: kern/118497
Submitted by: Pasi Parviainen
for that argument. This will allow DDB to detect the broad category of
reason why the debugger has been entered, which it can use for the
purposes of deciding which DDB script to run.
Assign approximate why values to all current consumers of the
kdb_enter() interface.
CPUs to make sure idle threads are evicted from the softc before returning
from acpi_cpu_shutdown(). However, this is unnecessary since stop_cpus()
handles this for itself and at this point it's possible that our IPI will be
blocked (interrupts disabled).
Thanks to: Glen Leeder <glen.leeder / nokia.com>
MFC after: 3 days
reason (not all BIOSen have _DIS methods for all link devices for example).
This matches the behavior of attach() with respect to _DIS as well.
Submitted by: njl
handle to the PCI device_t if the ACPI device_t is already attached to a
driver. This happens on the Tablet TC1000 which for some reason includes
two PCI-ISA bridges and treats the second bridge as an ACPI system resource
device.
Reviewed by: njl (a while ago)
MFC after: 3 days
to kproc_xxx as they actually make whole processes.
Thos makes way for us to add REAL kthread_create() and friends
that actually make theads. it turns out that most of these
calls actually end up being moved back to the thread version
when it's added. but we need to make this cosmetic change first.
I'd LOVE to do this rename in 7.0 so that we can eventually MFC the
new kthread_xxx() calls.
voltage of 0. This can result in a divide by zero trap. Add a guard
for this case. The value of lfcap is checked in acpi_battery_bif_valid()
just before this, so it is safe.
Reportd by: sam
Approved by: re
MFC after: 3 days
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
support machines having multiple independently numbered PCI domains
and don't support reenumeration without ambiguity amongst the
devices as seen by the OS and represented by PCI location strings.
This includes introducing a function pci_find_dbsf(9) which works
like pci_find_bsf(9) but additionally takes a domain number argument
and limiting pci_find_bsf(9) to only search devices in domain 0 (the
only domain in single-domain systems). Bge(4) and ofw_pcibus(4) are
changed to use pci_find_dbsf(9) instead of pci_find_bsf(9) in order
to no longer report false positives when searching for siblings and
dupe devices in the same domain respectively.
Along with this change the sole host-PCI bridge driver converted to
actually make use of PCI domain support is uninorth(4), the others
continue to use domain 0 only for now and need to be converted as
appropriate later on.
Note that this means that the format of the location strings as used
by pciconf(8) has been changed and that consumers of <sys/pciio.h>
potentially need to be recompiled.
Suggested by: jhb
Reviewed by: grehan, jhb, marcel
Approved by: re (kensmith), jhb (PCI maintainer hat)
polling/interrupt-driven fallback and instead use polling only during
boot and pure interrupt-driven mode after boot. Polled mode could be
relegated completely to a legacy role if we could enable interrupts
during boot. Polled mode can be forced after boot by setting
debug.acpi.ec.polled="1", i.e. if there are timeouts.
- Use polling only during boot, shutdown, or if requested by the user.
Otherwise, use a generation count of GPEs, incremented atomically. This
prevents an old status value from being used if the EC is really slow
and the same condition (i.e. multiple IBEs for a write transaction) is
being checked.
- Check for and run the query handler directly if the SCI bit is set in
the status register during boot. Previously, the query handler wouldn't
run until interrupts were finally enabled late in boot.
- During boot and after starting a command, check if the event appears
to already have occurred before we even start waiting. If so, it's
possible the EC is very slow and we might accept an old status value.
Print a warning in this case. Once we've booted, interrupt-driven mode
should work just fine but polled mode could be unreliable. There's not
much more we can do about this until interrupts are enabled during boot.
- In the above case, we also do one final check if the interrupt-driven
mode gets a timeout. If the status is complete, it will force the
system back into polled mode since interrupt mode doesn't work. For
polled mode during boot, if the status appears to be already complete
before beginning the check loop, it waits 10 us before actually checking
the status, just in case the EC is really slow and hasn't gotten to work
on the new request yet.
- Use upper-case hex for the _Qxx method
- Use device_printf for errors, don't hide them under verbose
- Increase default total timeout to 750 ms and decrease polling interval
to 5 us.
- Don't pass the status value via the softc. Just read it directly.
- Remove the mutex. We use the sx lock for transaction serialization
with the query handler.
- Remove the Intel copyright notice as no code of theirs was ever
present in this file (verified against rev 1.1)
- Allow KTR module-only builds for ease of testing
Thanks to jkim and Alexey Starikovskiy for helpful discussions and testing.
Approved by: re
MFC after: 2 weeks
needed at least to convince the BIOS to give us access to CPU freq
control on MacBooks.
Submitted by: Rui Paulo <rpaulo / fnop.net>
Approved by: re
MFC after: 5 days
the fast or safe/slow method is in use. Fast remains at 1000, slow is
now at 850 (always preferred to TSC). Since the HPET has proven slower
than ACPI-fast on some systems, drop its quality to 900. In the future,
it is hoped that HPET performance will improve as it is the main
timer Intel supports. HPET may move back to 2000 in -current once RELENG_7
is branched to ensure that it gets tested.
Approved by: re
advancing. Read from the timer before attaching to be sure it advances
in 1 us. Since the slowest rate allowed by the spec is 10 MHz, the
timer is guaranteed to change in this interval if it is working.
Tested by: Rui Paulo
Approved by: re
MFC after: 3 days
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
sysctl_handle_int is not sizeof the int type you want to export.
The type must always be an int or an unsigned int.
Remove the instances where a sizeof(variable) is passed to stop
people accidently cut and pasting these examples.
In a few places this was sysctl_handle_int was being used on 64 bit
types, which would truncate the value to be exported. In these
cases use sysctl_handle_quad to export them and change the format
to Q so that sysctl(1) can still print them.
While in the suspend path, this means the idle thread will just return
immediately rather than trying to enter C1-n. This helps in the case where
the chipset is powered down before the rest of the system and reads from
the cpu sleep registers begin returning immediately, causing the logic that
catches bad C2/C3 behavior to kick in. Observed on my Panasonic Y4.
MFC after: 3 days
(j/i) was being used and it was being incremented, not decremented as before.
Factor out this code into a common function and call it from both the common
and per-CPU case.
MFC after: 1 day
The global lock is a memory region shared with the BIOS and thus
has some strange behavior like the fact that the sleep is 1 ms max.
We use standard mutexes to synchronize with the SCI so acquiring
the global lock after locking the mutex resulted in a witness
warning.
To deal with this for now, acquire the global lock before all other
locks, similar to Giant. This should fix the witness "sleeping
with mutex held" issue on boot that occurred after the last ACPI-CA
import. In the future, we hope to move to the new mutex interface
in ACPI-CA instead of the pseudo-semaphore version we have now.
Reviewed by: jkim
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
- Simplify the amount of work that has be done for each architecture by
pushing more of the truly MI code down into the PCI bus driver.
- Don't bind MSI-X indicies to IRQs so that we can allow a driver to map
multiple MSI-X messages into a single IRQ when handling a message
shortage.
The changes include:
- Add a new pcib_if method: PCIB_MAP_MSI() which is called by the PCI bus
to calculate the address and data values for a given MSI/MSI-X IRQ.
The x86 nexus drivers map this into a call to a new 'msi_map()' function
in msi.c that does the mapping.
- Retire the pcib_if method PCIB_REMAP_MSIX() and remove the 'index'
parameter from PCIB_ALLOC_MSIX(). MD code no longer has any knowledge
of the MSI-X index for a given MSI-X IRQ.
- The PCI bus driver now stores more MSI-X state in a child's ivars.
Specifically, it now stores an array of IRQs (called "message vectors" in
the code) that have associated address and data values, and a small
virtual version of the MSI-X table that specifies the message vector
that a given MSI-X table entry uses. Sparse mappings are permitted in
the virtual table.
- The PCI bus driver now configures the MSI and MSI-X address/data
registers directly via custom bus_setup_intr() and bus_teardown_intr()
methods. pci_setup_intr() invokes PCIB_MAP_MSI() to determine the
address and data values for a given message as needed. The MD code
no longer has to call back down into the PCI bus code to set these
values from the nexus' bus_setup_intr() handler.
- The PCI bus code provides a callout (pci_remap_msi_irq()) that the MD
code can call to force the PCI bus to re-invoke PCIB_MAP_MSI() to get
new values of the address and data fields for a given IRQ. The x86
MSI code uses this when an MSI IRQ is moved to a different CPU, requiring
a new value of the 'address' field.
- The x86 MSI psuedo-driver loses a lot of code, and in fact the separate
MSI/MSI-X pseudo-PICs are collapsed down into a single MSI PIC driver
since the only remaining diff between the two is a substring in a
bootverbose printf.
- The PCI bus driver will now restore MSI-X state (including programming
entries in the MSI-X table) on device resume.
- The interface for pci_remap_msix() has changed. Instead of accepting
indices for the allocated vectors, it accepts a mini-virtual table
(with a new length parameter). This table is an array of u_ints, where
each value specifies which allocated message vector to use for the
corresponding MSI-X message. A vector of 0 forces a message to not
have an associated IRQ. The device may choose to only use some of the
IRQs assigned, in which case the unused IRQs must be at the "end" and
will be released back to the system. This allows a driver to use the
same remap table for different shortage values. For example, if a driver
wants 4 messages, it can use the same remap table (which only uses the
first two messages) for the cases when it only gets 2 or 3 messages and
in the latter case the PCI bus will release the 3rd IRQ back to the
system.
MFC after: 1 month
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
obtaining and releasing shared and exclusive locks. The algorithms for
manipulating the lock cookie are very similar to that rwlocks. This patch
also adds support for exclusive locks using the same algorithm as mutexes.
A new sx_init_flags() function has been added so that optional flags can be
specified to alter a given locks behavior. The flags include SX_DUPOK,
SX_NOWITNESS, SX_NOPROFILE, and SX_QUITE which are all identical in nature
to the similar flags for mutexes.
Adaptive spinning on select locks may be enabled by enabling the
ADAPTIVE_SX kernel option. Only locks initialized with the SX_ADAPTIVESPIN
flag via sx_init_flags() will adaptively spin.
The common cases for sx_slock(), sx_sunlock(), sx_xlock(), and sx_xunlock()
are now performed inline in non-debug kernels. As a result, <sys/sx.h> now
requires <sys/lock.h> to be included prior to <sys/sx.h>.
The new kernel option SX_NOINLINE can be used to disable the aforementioned
inlining in non-debug kernels.
The size of struct sx has changed, so the kernel ABI is probably greatly
disturbed.
MFC after: 1 month
Submitted by: attilio
Tested by: kris, pjd
one (hardware & global lock). This should address witness complaints that
a duplicate mutex is being acquired. Be sure to free the mutex to fix a
potential memory leak.
MFC after: 3 days
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.
cause the EC to stop handling future events because the GPE stayed masked.
Set a flag when queueing a GPE handler since it will ultimately re-enable
the GPE. In all other cases, re-enable it ourselves. I reworked the
patch from the submitter.
Submitted by: Rong-en Fan <grafan@gmail.com>
most systems, it causes the EC not to respond for some Acer and Compaq/HP
laptops. This is the default value for Linux also. For systems that need
it, burst mode can be enabled via the tunable/sysctl:
debug.acpi.ec.burst="1"
acpi module. Also clean up print of args a little.
This was accidentally committed as 1.9.2.3 in the stable branch. Since it
is harmless, I will let the "insta-MFC" stand unless there is a problem.
EC occasionally times out and provides bogus values (3000C). This change
prevents those systems from prematurely shutting down while we work on the
underlying problem. Also, bump the sanity value to 0...200C from 0...150C.
case where it asynchronously exits burst mode on its own. Handle different
values of hz in sleep loop. Provide more debugging options to tune EC
behavior. These tunables/sysctls may be temporary and are not for user
access if the EC is working properly. Burst mode is now on by default for
testing and the poll interval has been increased from 100 to 500 us and
total timeout from 100 to 500 ms.
Hopefully this should be the first step of addressing reports of timeout
errors during battery or thermal access, especially on HP/Compaq laptops.
It is reasonably stable and should not cause a loss of functionality or
performance on systems that were previously working. Testing shows an
increase of responsiveness by ~75% on one system.
PR: kern/98171
triggers a KASSERT) or local variables. In the case of kern_ndis, the
tsleep() actually used a common sleep address (curproc) making it
susceptible to a premature wakeup.
- First off, device drivers really do need to know if they are allocating
MSI or MSI-X messages. MSI requires allocating powerof2() messages for
example where MSI-X does not. To address this, split out the MSI-X
support from pci_msi_count() and pci_alloc_msi() into new driver-visible
functions pci_msix_count() and pci_alloc_msix(). As a result,
pci_msi_count() now just returns a count of the max supported MSI
messages for the device, and pci_alloc_msi() only tries to allocate MSI
messages. To get a count of the max supported MSI-X messages, use
pci_msix_count(). To allocate MSI-X messages, use pci_alloc_msix().
pci_release_msi() still handles both MSI and MSI-X messages, however.
As a result of this change, drivers using the existing API will only
use MSI messages and will no longer try to use MSI-X messages.
- Because MSI-X allows for each message to have its own data and address
values (and thus does not require all of the messages to have their
MD vectors allocated as a group), some devices allow for "sparse" use
of MSI-X message slots. For example, if a device supports 8 messages
but the OS is only able to allocate 2 messages, the device may make the
best use of 2 IRQs if it enables the messages at slots 1 and 4 rather
than default of using the first N slots (or indicies) at 1 and 2. To
support this, add a new pci_remap_msix() function that a driver may call
after a successful pci_alloc_msix() (but before allocating any of the
SYS_RES_IRQ resources) to allow the allocated IRQ resources to be
assigned to different message indices. For example, from the earlier
example, after pci_alloc_msix() returned a value of 2, the driver would
call pci_remap_msix() passing in array of integers { 1, 4 } as the
new message indices to use. The rid's for the SYS_RES_IRQ resources
will always match the message indices. Thus, after the call to
pci_remap_msix() the driver would be able to access the first message
in slot 1 at SYS_RES_IRQ rid 1, and the second message at slot 4 at
SYS_RES_IRQ rid 4. Note that the message slots/indices are 1-based
rather than 0-based so that they will always correspond to the rid
values (SYS_RES_IRQ rid 0 is reserved for the legacy INTx interrupt).
To support this API, a new PCIB_REMAP_MSIX() method was added to the
pcib interface to change the message index for a single IRQ.
Tested by: scottl
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
return an error since it returns a count of battery devices in the system.
Set it to 0 explicitly, since it is the only switch branch that doesn't set
it.
# I guess no one uses it.
pcib_alloc_msix() methods instead of using the method from the generic
PCI-PCI bridge driver as the PCI-PCI methods will be gaining some PCI-PCI
specific logic soon.
- Add 3 new functions to the pci_if interface along with suitable wrappers
to provide the device driver visible API:
- pci_alloc_msi(dev, int *count) backed by PCI_ALLOC_MSI(). '*count'
here is an in and out parameter. The driver stores the desired number
of messages in '*count' before calling the function. On success,
'*count' holds the number of messages allocated to the device. Also on
success, the driver can access the messages as SYS_RES_IRQ resources
starting at rid 1. Note that the legacy INTx interrupt resource will
not be available when using MSI. Note that this function will allocate
either MSI or MSI-X messages depending on the devices capabilities and
the 'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. Also note
that the driver should activate the memory resource that holds the
MSI-X table and pending bit array (PBA) before calling this function
if the device supports MSI-X.
- pci_release_msi(dev) backed by PCI_RELEASE_MSI(). This function
releases the messages allocated for this device. All of the
SYS_RES_IRQ resources need to be released for this function to succeed.
- pci_msi_count(dev) backed by PCI_MSI_COUNT(). This function returns
the maximum number of MSI or MSI-X messages supported by this device.
MSI-X is preferred if present, but this function will honor the
'hw.pci.enable_msix' and 'hw.pci.enable_msi' tunables. This function
should return the largest value that pci_alloc_msi() can return
(assuming the MD code is able to allocate sufficient backing resources
for all of the messages).
- Add default implementations for these 3 methods to the pci_driver generic
PCI bus driver. (The various other PCI bus drivers such as for ACPI and
OFW will inherit these default implementations.) This default
implementation depends on 4 new pcib_if methods that bubble up through
the PCI bridges to the MD code to allocate IRQ values and perform any
needed MD setup code needed:
- PCIB_ALLOC_MSI() attempts to allocate a group of MSI messages.
- PCIB_RELEASE_MSI() releases a group of MSI messages.
- PCIB_ALLOC_MSIX() attempts to allocate a single MSI-X message.
- PCIB_RELEASE_MSIX() releases a single MSI-X message.
- Add default implementations for these 4 methods that just pass the
request up to the parent bus's parent bridge driver and use the
default implementation in the various MI PCI bridge drivers.
- Add MI functions for use by MD code when managing MSI and MSI-X
interrupts:
- pci_enable_msi(dev, address, data) programs the MSI capability address
and data registers for a group of MSI messages
- pci_enable_msix(dev, index, address, data) initializes a single MSI-X
message in the MSI-X table
- pci_mask_msix(dev, index) masks a single MSI-X message
- pci_unmask_msix(dev, index) unmasks a single MSI-X message
- pci_pending_msix(dev, index) returns true if the specified MSI-X
message is currently pending
- Save the MSI capability address and data registers in the pci_cfgreg
block in a PCI devices ivars and restore the values when a device is
resumed. Note that the MSI-X table is not currently restored during
resume.
- Add constants for MSI-X register offsets and fields.
- Record interesting data about any MSI-X capability blocks we come
across in the pci_cfgreg block in the ivars for PCI devices.
Tested on: em (i386, MSI), bce (amd64/i386, MSI), mpt (amd64, MSI-X)
Reviewed by: scottl, grehan, jfv
MFC after: 2 months
WB (write-back) on x86 via control bits in PTEs and PDEs (including making
use of the PAT MSR). Changes include:
- A new pmap_mapdev_attr() function for amd64 and i386 which takes an
additional parameter (relative to pmap_mapdev()) specifying the cache
mode for this mapping. Note that on amd64 only WB mappings are done with
the direct map, all other modes result in a private mapping.
- pmap_mapdev() on i386 and amd64 now defaults to using UC (uncached)
mappings rather than WB. Previously we relied on the BIOS setting up
MTRR's to enforce memio regions being treated as UC. This might make
hw.cbb_start_memory unnecessary in some cases now for example.
- A new pmap_mapbios()/pmap_unmapbios() API has been added to allow places
that used pmap_mapdev() to map non-device memory (such as ACPI tables)
to do so using WB as before.
- A new pmap_change_attr() function for amd64 and i386 that changes the
caching mode for a range of KVA.
Reviewed by: alc
function independently. This change is not only load-tested since I don't
have hardware that supports acpi_dock. Clean up comments and a name a
few constants.
that aren't listed as valid in the link device's set of possible IRQs.
This allows the hints to be used to work around broken BIOSes that don't
specify the correct ste of possible IRQs. A warning is issued in the
dmesg in this case to be consistent with the $PIR handling code.
MFC after: 1 week
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
Prevent casual modification by requiring hw.acpi.thermal.user_override to
be set first. Fix printing of negative temperatures in the K->C conversion.
Document the remaining thermal sysctls.
MFC after: 3 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.
Move the code for printing timer statistics into a test function instead of
an ifdef (accessible via the debug.acpi.hpet_test tunable). Also use defines
for register offsets instead of magic values.
Courtesy of: slow flight to HK
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
some systems were designed so that AML writes to various resources shared
with OS drivers, including the RTC, PIC, PCI, etc. These writes could
collide with writes by the OS and should never be performed. For now, we
print a message if such an access occurs, but do not block it. To block
the access, the tunable "debug.acpi.block_bad_io" can be set to 1. In the
future, we will flip the switch and this will become the default.
Information about this problem was found in Microsoft KB 283649. They
block IO accesses if the BIOS indicates via _OSI that it is Windows 2001
or higher. They always block accesses to the PIC, cascaded PIC, and ELCRs,
no matter how old the BIOS.
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
taskqueue_start_threads(struct taskqueue **, int count, int pri,
const char *name, ...);
This allows the creation of 1 or more threads that will service a single
taskqueue. Also rework the taskqueue_create() API to remove the API change
that was introduced a while back. Creating a taskqueue doesn't rely on
the presence of a process structure, and the proc mechanics are much better
encapsulated in taskqueue_start_threads(). Also clean up the
taskqueue_terminate() and taskqueue_free() functions to safely drain
pending tasks and remove all associated threads.
The TASKQUEUE_DEFINE and TASKQUEUE_DEFINE_THREAD macros have been changed
to use the new API, but drivers compiled against the old definitions will
still work. Thus, recompiling drivers is not a strict requirement.
before. The symptom is that the battery inform us its charge and discharge
at the same time...
* fix bst.rate to correctly output the (dis)charging rate. We'll use
the current average over one minute command and not the at_rate command.
Note that this method is not correct if the capacity_mode is set, but
since we don't set it ourself, it is not a problem.
The at_rate do not give the actual rate but is used to compute the
estimated time for (dis)charging a battery. We should actually
write an estimation of the actual rate using at_rate cmd and then
perform a read to the various estimators.
Approved by: njl
MFC after: 2 days
various pcib drivers to use their own private devclass_t variables for
their modules.
- Use the DEFINE_CLASS_0() macro to declare drivers for the various pcib
drivers while I'm here.
doesn't have any actual interrupts is listed in a _PRT entry, only print
a warning rather than panic'ing when we walk the _PRT's to build up count
of entries that reference a given link (the counts are used as weights so
that we can attempt to balance the load across IRQs used by link devices).
Instead, only panic if we attempt to use the _PRT entry to route an
interrupt for a device.
PR: i386/89545
Tested by: anders
POSIX. This also makes the struct correct we ever implement an i386-time64
architecture. Not that we need too.
Reviewed by: imp, brooks
Approved by: njl (acpica), des (no objects, touches procfs)
Tested with: make universe
to search for a specific extended capability. If the specified capability
is found for the given device, then the function returns success and
optionally returns the offset of that capability. If the capability is
not found, the function returns an error.
immediately from acpi_pci_link_route_interrupt() since we aren't going
to have a valid pci_link device to talk to try to route interrupts. This
fixes a page fault if you disable just pci_link. Note that trying to use
ACPI without pci_link is probably not advised however.
MFC after: 1 week
Tested by: Eugene Grosbein eugen at kuzbass dot ru
polarity. Some machines route PCI IRQs to an ISA IRQ but fail to include
an interrupt override entry to set the polarity and trigger of the given
ISA IRQ in their MADT table.
PR: usb/74989
Reported by: Julien Gabel jpeg at thilelli dot net
MFC after: 1 week
- Improve panic message if we fail to read the PCI bus number from a bridge
device.
- Don't try to lookup a BIOS IRQ for a link unless the link is routed via
an ISA IRQ since BIOSen currently only route PCI link devices via ISA
IRQs.
Tested by: Mathieu Prevot bsdhack at club-internet dot fr
MFC after: 1 week
Instead, re-evaluate _BIF only when we get a notify and use the cached
results. We also still evaluate _BIF once on boot. Also, optimize the
init loop a little by only querying for a particular info if it's not valid.
MFC after: 2 days
the IRQ set by the BIOS in existing devices to actually get the correct
bus number of the child PCI bus. I was not reading the bus number from
the bridge device correctly. The __BUS_ACCESSOR() macros (from which
pcib_get_bus() is built) assume that the passed in argument is a child
device. However, at the time I'm reading the bus there is no child
device yet, so I was passing in the pcib device as the child device.
The parent of the pcib device probably returned an error in the case of
a host bridge, thus resulting in random stack garbage for the bus number.
For PCI-PCI bridges, the bus number being used was actually the subvendor
of the PCI-PCI bridge device itself.
MFC after: 1 week
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
- Prefer '_' to ' ', as it results in more easily parsed results in
memory monitoring tools such as vmstat.
- Remove punctuation that is incompatible with using memory type names
as file names, such as '/' characters.
- Disambiguate some collisions by adding subsystem prefixes to some
memory types.
- Generally prefer lower case to upper case.
- If the same type is defined in multiple architecture directories,
attempt to use the same name in additional cases.
Not all instances were caught in this change, so more work is required to
finish this conversion. Similar changes are required for UMA zone names.
immediately, back off to the next higher Cx sleep state. Some machines
with a Via chipset report a valid C3 but a register read doesn't actually
halt the CPU. This would cause the machine to appear unresponsive as it
repeatedly called cpu_idle() which immediately returned. Causing interrupts
(i.e. by pressing the power button) would cause the system to make forward
progress, showing that it wasn't actually hung.
Also, enable interrupts a little earlier. We don't need them disabled
to calculate the delta time for the read.
Reported by: silby
MFC after: 2 weeks
is on AC power (i.e. not a laptop). This allows power_profile to run once
for desktop systems as well, for instance, to set C3 or CPU frequency.
MFC after: 2 weeks
support the CM-battery interface. Smart batteries can eventually be
supported without ACPI via a separate SMBus interface. The ACPI interface
uses the embedded controller for reading/writing to the SMBus, and normal
ASL definitions for locating the battery controller (since SMBus can't be
enumerated.) Also import definitions for the smart battery interface.
This was written by Hans Petter Selasky with minor cleanups from myself.
Submitted by: Hans Petter Selasky <hselasky / c2i.net>
* Use ACPI_BATT_UNKNOWN instead of constants
* Use maxunit instead of a count of devices since we may have sparse
battery devices in the future. Only userland should be using unit
numbers anyway, so provide a translation function. (Kernel use of
batteries should be restricted to looking up a device_t and calling
methods directly.
* Don't check acpi_BatteryIsPresent() in acpi_battery. Leave it up to
the hardware-specific driver (i.e. cmbat) since smart batteries seem
to not report the "battery present" flag.
* Convert mA to mW if the battery uses those units. CM-batteries only
used mW so this deficiency went unnoticed.
* Clean strings reported in the battery info from any control chars.
* Only dereference the unit from ioctl_arg if the full struct is present.
Unit wouldn't have been used later if it wasn't present but this is
cleaner. Translate the unit if it's not ACPI_BATTERY_ALL_UNITS.
* bzero structs before returning them to usermode for future compat.
Most of this work was submitted by Hans Petter Selasky and then majorly
reworked by myself.
Submitted by: Hans Petter Selasky <hselasky / c2i.net>
with some Dell servers that booted w/o a problem[*] on 5.4, but failed
with 6.0-BETA.
On the PCI bus, when we do lazy resource allocation, we narrow the
range requested as we pass through bridges to reflect how the bridges
are programmed and what addresses they pass. However, when we're
doing an allocation on a bus that's directly connected to a host
bridge, no such translation can take place. We already had a fallback
range for memory requests, but none for ioports. As such, provide a
fallback for I/O ports so we don't allocate location 0, which will
have undesired side effects when the resources are actually used.
This fixes a problem with booting a Dell server with usb in the
kernel. However, it is an unsatisfying solution. I don't like the
hard coded value, and I think we should start narrowing the resources
returned to not be in the so-called isa alias area (where the ranage &
0x0300 must be 0 iirc). Doing such filtering will have to wait for
another day.
This may be a good 6 candidate, maybe after its had a chance to be
refined.
Tested by: glebius@
cooling thread which refers psv, tc1, tc2 and tsp. The previous
code made the period where sc->tz_zone.tsp was zero, and it caused
panic at msleep().
Reported by: keramida
Tested by: keramida
effect. since CPU speed is restored by degrees, we cannot use
the facility of saving cpu speed by CPUFREQ_set() effectively.
so, we need to save the value when passive cooling is in effect.
Repoeted by: Kevin Oberman <oberman__at__es.net>
Previously, we used all info (including -1 or "not present") which would
keep the system from reaching 100% when charging.
Reported by: Eric Anderson
MFC after: 2 days
later sum capacities for all batteries, even those that weren't actually
present. We only need to do this for _BST but do it for all of them.
Reported by: Eric Anderson
MFC after: 1 day
(i.e., smart battery) and fix various bugs found during the cleanup.
API changes:
* kernel access:
Access to individual batteries is now via devclass_find("battery").
Introduce new methods ACPI_BATT_GET_STATUS (for _BST-formatted data) and
ACPI_BATT_GET_INFO (for _BIF-formatted data). The helper function
acpi_battery_get_battinfo() now takes a device_t instead of a unit #
argument. If dev is NULL, this signifies all batteries.
* ioctl access:
The ACPIIO_BATT_GET_TYPE and ACPIIO_BATT_GET_BATTDESC ioctls have been
removed. Since there is now no need for a mapping between "virtual" unit
and physical unit, usermode programs can just specify the unit directly and
skip the old translation steps. In fact, acpiconf(8) was actually already
doing this and virtual unit was the same as physical unit in all cases
since there was previously only one battery type (acpi_cmbat). Additionally,
we now map the ACPIIO_BATT_GET_BIF and ACPIIO_BATT_GET_BST ioctls for all
batteries, if they provide the associated methods.
* apm compatibility device/ioctls: no change
* sysctl: no change
Since most third-party applications use the apm(4) compat interface, there
should be very few affected applications (if any).
Reviewed by: bruno
MFC after: 5 days
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
number of task threads to start on boot. Go back to a default of 3
threads to work around lost battery state problems. Users that need
a setting of 1 can set this via the tunable. I am investigating the
underlying issues and this tunable can be removed once they are solved.
MFC after: 2 days
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
systems that boot with this value at the lowest setting. Change the
default boot config back to "leave frequency as BIOS set it". Also, fix
buglet where acpi_throttle wouldn't be used if p4tcc was present but
disabled by the user.
MFC after: 1 week
to see what features they may support before calling identify/probe/attach.
This is necessary because the ACPI 3.0 spec requires driver support be
advertised before running any methods. For now, the flags are as specified
in for the _PDC and _OSC methods but we can support private flags as needed.
Add an implementation of this for acpi_cpu. It checks all its children
(notably cpufreq drivers) and calls the _PDC method to report the results.
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.
may help with various interdependencies between subsystems. More testing
is needed to understand what the underlying issues are here.
Tested by: Juho Vuori
MFC after: 2 days
count of valid frequencies and use that as the final package count, don't
give up when the first invalid state is found. Also, add 0x9999 and expand
our upper check to >= 0xffff Mhz [2].
Submitted by: Bruno Ducrot, Jung-uk Kim [2]
(like an EC/SMbus controller) to access the EC address space. Access
is synchronized by the EcLock/Unlock routines in EcSpaceHandler().
Tested by: Hans Petter Selasky
same value as the previous ioctls so no binary change. Also, make a few
style changes to reduce diffs to my tree.
Loosely based on code from: Hans Petter Selasky
- Fix a bug in the same condition where we forgot to drop the ACPI pcib
lock. This fixes hangs after the pcib0 attach on some machines.
Tested by: sos (2)
modulating the STPCLK# pin based on the duty cycle. Since p4tcc uses the
same mechanism (but internal to the CPU), we triggered a hang on some
systems at low frequencies when both were in use. Now, disable
acpi_throttle when p4tcc is also present.
Tested by: Kevin Oberman
SMP systems. It appears all drivers except ichss should attach to each
CPU and that settings should be performed on each CPU. Add comments about
this. Also, add a guard for p4tcc's identify method being called more than
once.
IRQ 0 and not an ExtINT pin. The MADT enumerators ignore the PC-AT flag
and ignore overrides that map IRQ 0 to pin 2 when this quirk is present.
- Add a block comment above the quirks to document each quirk so that we
can use more verbose descriptions quirks.
MFC after: 2 weeks
modes, systems may take longer. If the status values don't match, try
matching just the lowest 8 bits if no bits above 8 are set in the desired
value. The IBM R32 has other bits set in the status register that are
irrelevant to the expected value.
the switch. Other interim tests (i.e., for minimum runtime) could
invalidate the start time. This fixes transitions to cooler states in that
now they go to the next active state (_AC0 -> _AC1) instead of going
straight to off (_AC0 -> off).
Submitted by: Alexandre "Sunny" Kovalenko (Alex.Kovalenko / verizon.net)
locks held, specify the ACPI_ISR flag to keep it from acquiring any more
mutexes (which could potentially sleep.) This should fix "could sleep"
warning messages on the following path:
msleep()
AcpiOsWaitSemaphore()
AcpiUtAcquireMutex()
AcpiDisableGpe()
EcGpeHandler()
AcpiEvGpeDispatch()
AcpiEvGpeDetect()
AcpiEvGpeDetect()
AcpiEvSciXruptHandler()
driver. This used to be handled by cpufreq_drv_settings() but it's
useful to get the type/flags separately from getting the settings.
(For example, you don't have to pass an array of cf_setting just to find
the driver type.)
Use this new method in our in-tree drivers to detect reliably if acpi_perf
is present and owns the hardware. This simplifies logic in drivers as well
as fixing a bug introduced in my last commit where too many drivers attached.
are not added to the list(s) of available settings. However, other drivers
can call the CPUFREQ_DRV_SETTINGS() method on those devices directly to
get info about available settings.
Update the acpi_perf(4) driver to use this flag in the presence of
"functional fixed hardware." Thus, future drivers like Powernow can
query acpi_perf for platform info but perform frequency transitions
themselves.
throttling, neglecting to do this kept the sysctls from appearing.
Attach an acpi_throttle device to each CPU that supports it.
Don't add a device if the P_BLK is invalid or if _PTC is not present.
This removes extraneous probe/attach failure messages on some machines.
Make the cpu throttle state local to the softc to account for partial
successes when changing the clock rate on MP machines.
doing it in the cpu driver. The previous code was incorrect anyway since
this value controls Px states, not throttling as the comment said. Since
we didn't support Px states before, there was no impact. Also, note that
we delay the write to SMI_CMD until after booting is complete since it
sometimes triggers a change in the frequency and we want to have all
drivers ready to detect/handle this.
devclass. As pointed out by dfr@, devclasses don't have to share the same
linkage if multiple drivers have the same name. Newbus should match the
devclasses based on name and allocate non-conflicting unit numbers.
the PERF_CTRL register in our probe method so that we can tell earlier
that another driver should handle this device due to FFixedHW. This avoids
scaring users when attach failed when we really wanted probe to fail.
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.
settings as exported via the ACPI _PSS method. OEMs use this interface
to encapsulate chipset or processor-specific methods (e.g., SpeedStep or
Powernow) and export their settings in a standard way. On systems that
have valid ACPI Performance states and a hardware-specific driver (e.g.,
ichss), acpi_perf(4) is preferred.
producers rather than consumers as new-bus resources only handle consumed
resources. We already do this for the other ACPI resource types that
support the producer/consumer attribute.
object (/) rather than the pci bus object when walking the _PRT to force
attach devices. We already look up relative to the root object when doing
interrupt routing.
Suggested by: njl
For such devices, we require _PRS to exist and we warn if any of the
resources in _PRS are not IRQ resources (since we'll have no way of knowing
which of those resources to use without a working _CRS). When it does
come time to set resources, we build up a resource buffer from scratch
as we do for devices with _CRS that only have IRQ resources.
- Fix a bug with setting extended IRQ resources where we set the IRQ value
in the wrong resource structure meaning that whichever IRQ was listed in
_PRS was used instead. This might fix some weird issues on certain boxes
where IRQs > 16 don't seem to work when using ACPI.
- Fix a bug with how we walked the resource buffer after _SRS to call
config_intr() in that the 'end' variable was not properly updated, so we
could either terminate the loop early or loop after the end of the
buffer.
Tested by: pjd
place device objects in \ (in this case, PCI links.) Work around this by
starting our probe from \. To avoid attaching system scope objects,
explicitly skip them. (I think it's an ACPI-CA bug that \_SB and \_TZ have
device and thermal object types.) Thanks to pjd@ for testing.
MFC after: 2 weeks
multiple IRQs (which is nonsense for _CRS) when the link hasn't been
programmed. Before, this was a KASSERT. A ServerWorks system was
seen returning IRQs of 0, 2 in response to _CRS before link setup.
Thanks to sam@ for quick testing and turnaround on this.
Tested by: sam
If we are resuming non-MPSAFE drivers, they need Giant held for them.
This may fix some obscure suspend/resume problems. It has fixed keyrate
setting problems that were triggered by cardbus (MPSAFE) changing the
ordering for syscons resume (non-MPSAFE). Also, add some asserts that
Giant is held in our suspend/resume and shutdown methods.
Found by: iedowse
MFC after: 2 days
non-standard BIOSen. We used to implement this in local patches but
now that ACPI-CA has merged/re-implemented most of our fixes, they were
no longer needed and we just needed to turn this knob on. Also, remove
an unnecessary cast.
Tested by: phk
back on again in resume. Override the default of D3 with the value the
BIOS specifies in _SxD, if present. Skip serial devices (PNP05xx) since
they seem to hang when set to D3 and may require special driver support.
Also, skip non-type 0 PCI devices (i.e., bridges) since our we don't yet
save/restore their config space and that seems to be necessary.
If this gives you trouble with suspend/resume, you can disable the new
ACPI and PCI power behavior separately with these tunables & sysctls:
debug.acpi.do_powerstate
hw.pci.do_powerstate
Approved by: imp (pci)
Tested by: acpi@ (numerous)
in the _PRS or _CRS of link devices. If faced with multiple DPFs in a
_PRS, we just use the first one. We assume that if _CRS has DPF tags they
only contain a single set since multiple DPFs wouldn't make any sense. In
practice, the only DPFs I've seen so far for link devices are that the one
IRQ resource is surrounded by a DPF tag pair for no apparent reason, and
this should handle that case fine now.
- Only allocate link structures for IRQ resources for link devices rather
than allocating a link structure for every resource.
Reviewed by: njl
Tested by: phk
