branches: 1.1.2;
Moved MI APM definitions into dev/apm.

fix few typos in comments.

Change the kqueue filterops::f_isfd field to filterops::f_flags, and
define a flag FILTEROP_ISFD that has the meaning of the prior f_isfd.
Field and flag name aligned with OpenBSD.

This does not constitute a functional or ABI change, as the field location
and size, and the value placed in that field, are the same as the previous
code, but we're bumping __NetBSD_Version__ so 3rd-party module source code
can adapt, as needed.

NetBSD 9.99.89

Use sel{record,remove}_knote().

branches: 1.33.18;
Kill some more extern struct cfdriver declarations.

Down with externs in .c!

Use C99 initializer for filterops

Mostly done with spatch with touchups for indentation

@@
expression a;
identifier b,c,d;
identifier p;
@@
const struct filterops p =
- { a, b, c, d
+ {
+ .f_isfd = a,
+ .f_attach = b,
+ .f_detach = c,
+ .f_event = d,
};

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.30.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

fix unused variable

branches: 1.28.2;
Remove code from dev/apm/apm.c for setting global variables to parameterise
the i386 bios apm code (now removed).
Remove the same code from the clone dev/hpc/apm/apmdev.c
Remove some not-used options from dev/apm/files.apm and the commented out
lines in ALL and GENERIC.
Maybe the APM_V10_ONLY and APM_NO_V12 could also be shot, but they are
further entwined in the code.

branches: 1.27.2; 1.27.12;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

Fix apm(4) suspend/resume:
- apm_suspend() and apm_standby() will call splhhigh() before entering
standby or suspend. After resume, the system go back tsleep()ing
in the apm thread without restoring the ipl (this is done in
apm_resume()), and calling tlseep() at IPL_HIGH cause a DIAGNOSTIC
panic (and other bad things, I guess).
Fix by calling apm_resume() from within apm_suspend() or apm_standby(),
after aa_set_powstate() has returned.
- In apm_event_handle(), we test (apm_standbys || apm_suspends) to set
apm_damn_fool_bios to 1 and break the while() loop in apm_periodic_check().
But we set apm_standbys or apm_suspends to non-0 only if apm_op_inprog
is 0 and we failed to record the apm event. With apmd listening
we usually succeed recording the event, so apm_standbys/apm_suspends remains
0 and we never go out of the while() loop.
Fix by apm_op_inprog instead of (apm_standbys || apm_suspends)
to break the loop.

branches: 1.25.2;
Remove some unecessary includes sys/user.h header.

In pmf(9), improve the implementation of device self-suspension
and make suspension by self, by drvctl(8), and by ACPI system sleep
play nice together. Start solidifying some temporary API changes.

1. Extract a new header file, <sys/device_if.h>, from <sys/device.h> and
#include it from <sys/pmf.h> instead of <sys/device.h> to break the
circular dependency between <sys/device.h> and <sys/pmf.h>.

2. Introduce pmf_qual_t, an aggregate of qualifications on a PMF
suspend/resume call. Start to replace instances of PMF_FN_PROTO,
PMF_FN_ARGS, et cetera, with a pmf_qual_t.

3. Introduce the notion of a "suspensor," an entity that holds a
device in suspension. More than one suspensor may hold a device
at once. A device stays suspended as long as at least one
suspensor holds it. A device resumes when the last suspensor
releases it.

Currently, the kernel defines three suspensors,

3a the system-suspensor: for system suspension, initiated
by 'sysctl -w machdep.sleep_state=3', by lid closure, by
power-button press, et cetera,

3b the drvctl-suspensor: for device suspension by /dev/drvctl
ioctl, e.g., drvctl -S sip0.

3c the system self-suspensor: for device drivers that suspend
themselves and their children. Several drivers for network
interfaces put the network device to sleep while it is not
administratively up, that is, after the kernel calls if_stop(,
1). The self-suspensor should not be used directly. See
the description of suspensor delegates, below.

A suspensor can have one or more "delegates". A suspensor can
release devices that its delegates hold suspended. Right now,
only the system self-suspensor has delegates. For each device
that a self-suspending driver attaches, it creates the device's
self-suspensor, a delegate of the system self-suspensor.

Suspensors stop a system-wide suspend/resume cycle from waking
devices that the operator put to sleep with drvctl before the cycle.
They also help self-suspension to work more simply, safely, and in
accord with expectations.

4. Add the notion of device activation level, devact_level_t,
and a routine for checking the current activation level,
device_activation(). Current activation levels are DEVACT_LEVEL_BUS,
DEVACT_LEVEL_DRIVER, and DEVACT_LEVEL_CLASS, which respectively
indicate that the device's bus is active, that the bus and device are
active, and that the bus, device, and the functions of the device's
class (network, audio) are active.

Suspend/resume calls can be qualified with a devact_level_t.
The power-management framework treats a devact_level_t that
qualifies a device suspension as the device's current activation
level; it only runs hooks to reduce the activation level from
the presumed current level to the fully suspended state. The
framework treats a devact_level_t qualifying device resumption
as the target activation level; it only runs hooks to raise the
activation level to the target.

5. Use pmf_qual_t, devact_level_t, and self-suspensors in several
drivers.

6. Temporarily add an unused power-management workqueue that I will
remove or replace, soon.

Treat OAPM_IOC_GETPOWER as APM_IOC_GETPOWER - from apmdev(4).

branches: 1.22.4; 1.22.6; 1.22.10; 1.22.14;
use device_lookup_private to get softc

branches: 1.21.2; 1.21.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.20.2; 1.20.4;
Use device_t and its accessors throughout. Use aprint_*_dev().

Improve PMF-ability.

Add a 'flags' argument to suspend/resume handlers and
callers such as pmf_system_suspend().

Define a flag, PMF_F_SELF, which indicates to PMF that a
device is suspending/resuming itself. Add helper routines,
pmf_device_suspend_self(dev) and pmf_device_resume_self(dev),
that call pmf_device_suspend(dev, PMF_F_SELF) and
pmf_device_resume(dev, PMF_F_SELF), respectively. Use
PMF_F_SELF to suspend/resume self in ath(4), audio(4),
rtw(4), and sip(4).

In ath(4) and in rtw(4), replace the icky sc_enable/sc_disable
callbacks, provided by the bus front-end, with
self-suspension/resumption. Also, clean up the bus
front-ends. Make sure that the interrupt handler is
disestablished during suspension. Get rid of driver-private
flags (e.g., RTW_F_ENABLED, ath_softc->sc_invalid); use
device_is_active()/device_has_power() calls, instead.

In the network-class suspend handler, call if_stop(, 0)
instead of if_stop(, 1), because the latter is superfluous
(bus- and driver-suspension hooks will 'disable' the NIC),
and it may cause recursion.

In the network-class resume handler, prevent infinite
recursion through if_init() by getting out early if we are
self-suspending (PMF_F_SELF).

rtw(4) improvements:

Destroy rtw(4) callouts when we detach it. Make rtw at
pci detachable. Print some more information with the "rx
frame too long" warning.

Remove activate() methods:

Get rid of rtw_activate() and ath_activate(). The device
activate() methods are not good for much these days.

Make ath at cardbus resume with crypto functions intact:

Introduce a boolean device property, "pmf-powerdown". If
pmf-powerdown is present and false, it indicates that a
bus back-end should not remove power from a device.

Honor this property in cardbus_child_suspend().

Set this property to 'false' in ath_attach(), since removing
power from an ath at cardbus seems to lobotomize the WPA
crypto engine. XXX Should the pmf-powerdown property
propagate toward the root of the device tree?

Miscellaneous ath(4) changes:

Warn if ath(4) tries to write crypto keys to suspended
hardware.

Reduce differences between FreeBSD and NetBSD in ath(4)
multicast filter setup.

Make ath_printrxbuf() print an rx descriptor's status &
key index, to help debug crypto errors.

Shorten a staircase in ath_ioctl(). Don't check for
ieee80211_ioctl() return code ERESTART, it never happens.

Split device_t/softc for i386's apm(4), and other related cosmetic changes.

Welcome to 4.99.55:

- Add a lot of missing selinit() and seldestroy() calls.

- Merge selwakeup() and selnotify() calls into a single selnotify().

- Add an additional 'events' argument to selnotify() call. It will
indicate which event (POLL_IN, POLL_OUT, etc) happen. If unknown,
zero may be used.

Note: please pass appropriate value of 'events' where possible.
Proposed on: <tech-kern>

branches: 1.17.2; 1.17.6;
Start detangling lock.h from intr.h. This is likely to cause short term
breakage, but the mess of dependencies has been regularly breaking the
build recently anyhow.

branches: 1.16.2;
Merge jmcneill-pm branch.

branches: 1.15.2;
Do not "return 1" from kqfilter for errors. That value is passed
directly to the userland caller and results in a mysterious EPERM.
Instead, return EINVAL or something else sensible depending on the
case.

lockmgr -> mutex

branches: 1.13.2;
Do not run the get_powstat callback in apm_attach(), this has a bad
effect with coretemp(4) where it tries to run xc_unicast() before
the xc_thread is ready. Anyway the get_powstat callback was there only
for APM_POWER_PRINT, which will print the correct info if requested
later.

branches: 1.12.6; 1.12.8; 1.12.14;
warning: 'apm_create_thread' declared 'static' but never defined

Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

branches: 1.10.2; 1.10.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.9.2;
Use aprint_normal for attachment messages.

__unused removal on arguments; approved by core.

Use __unused in function arguments where appropiate. (hi christos)

add missing initializer element

branches: 1.5.4; 1.5.6;
make APM_POWER_PRINT compile.

fix some field names (Arnaud Lacombe)

Make apm an MI backend to be used by the i386 bios implementation and the
acpi implementation. Based on work by jmcneil.

branches: 1.2.26; 1.2.36; 1.2.40; 1.2.42;
Remove src/sys/dev/apm/*. (They've gone to arch/hpcmips/dev/apm.)

Common part of APM (advanced power management) support for Hpcmips.

Remove code from dev/apm/apm.c for setting global variables to parameterise
the i386 bios apm code (now removed).
Remove the same code from the clone dev/hpc/apm/apmdev.c
Remove some not-used options from dev/apm/files.apm and the commented out
lines in ALL and GENERIC.
Maybe the APM_V10_ONLY and APM_NO_V12 could also be shot, but they are
further entwined in the code.

Remove the fields were are only used by the 'now removed' i386 APC bios
support.

branches: 1.5.34; 1.5.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.54; 1.4.56; 1.4.58;
Make apm an MI backend to be used by the i386 bios implementation and the
acpi implementation. Based on work by jmcneil.

branches: 1.3.4; 1.3.8; 1.3.16;
merge ktrace-lwp.

branches: 1.2.12;
Fix typo in defined variable; from Sergey Svishchev.

branches: 1.1.2; 1.1.8;
Moved MI APM definitions into dev/apm.

Add some #includes to make a few more header files compile.

More on PR 41200: headers that declare ioctls should include sys/ioccom.h.
This covers (I think) all the MI headers outside of external/ (and dist/).

branches: 1.5.44; 1.5.64;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.54; 1.4.56; 1.4.58;
Make apm an MI backend to be used by the i386 bios implementation and the
acpi implementation. Based on work by jmcneil.

branches: 1.3.4; 1.3.8; 1.3.16;
merge ktrace-lwp.

branches: 1.2.4;
nuke trailing whitespace

branches: 1.1.2; 1.1.8; 1.1.16; 1.1.18;
Moved MI APM definitions into dev/apm.

buildfix: include <sys/selinfo.h> for struct selinfo.

branches: 1.7.8; 1.7.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.2; 1.6.4;
Split device_t/softc for i386's apm(4), and other related cosmetic changes.

branches: 1.5.8; 1.5.12;
lockmgr -> mutex

branches: 1.4.6; 1.4.8; 1.4.14; 1.4.16;
- struct proc *sc_thread;
+ lwp_t *sc_thread;

branches: 1.3.14; 1.3.16;
Make apm an MI backend to be used by the i386 bios implementation and the
acpi implementation. Based on work by jmcneil.

branches: 1.2.26; 1.2.36; 1.2.40; 1.2.42;
Remove src/sys/dev/apm/*. (They've gone to arch/hpcmips/dev/apm.)

Common part of APM (advanced power management) support for Hpcmips.

Remove unused macro.

branches: 1.4.36; 1.4.38;
Remove code from dev/apm/apm.c for setting global variables to parameterise
the i386 bios apm code (now removed).
Remove the same code from the clone dev/hpc/apm/apmdev.c
Remove some not-used options from dev/apm/files.apm and the commented out
lines in ALL and GENERIC.
Maybe the APM_V10_ONLY and APM_NO_V12 could also be shot, but they are
further entwined in the code.

branches: 1.3.94; 1.3.104;
Make apm an MI backend to be used by the i386 bios implementation and the
acpi implementation. Based on work by jmcneil.

branches: 1.2.26; 1.2.36; 1.2.40; 1.2.42;
Remove src/sys/dev/apm/*. (They've gone to arch/hpcmips/dev/apm.)

Common part of APM (advanced power management) support for Hpcmips.