Garbage collect sleep_abort(); it doesn't do anything useful anymore.

ok deraadt@, mlarkin@

Adds request_sleep(), a MI way of sending the machine to sleep in
a safe thread. Support is limited to amd64, i386 and arm64 at the
moment, macppc gets only an empty stub.

feedback from kettenis@
tested by bluhm@
ok phessler@

Lenovo x13s requires a Qualcomm firmware file which is 13.7MB, so increase
the limit from 5MB to 15MB.

What does it contain? A full copy of Windows VM framework? For now, we
need it to read the battery status...

"go for it" deraadt@

Make sure we don't suspend if we have no way to wake up the machine.
The idea is that device drivers that can wake up the machine register
themselves by calling device_register_wakeup(). To prevent regressions
on amd64, we let acpi(4) register itself as a wakeup device if the AML
for the machine defines wakeup devices. This may be refined in the
future.

This diff will prevent people from suspending their arm64 SBCs without
having a way to wake them up. For now the only driver that registers
itself is axppmic(4), which means that at this moment only SBCs with
an allwinner A64 or H5 SoC will actually support suspend/resume.

ok mlarkin@, deraadt@

Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

Adds request_sleep(), a MI way of sending the machine to sleep in
a safe thread. Support is limited to amd64, i386 and arm64 at the
moment, macppc gets only an empty stub.

feedback from kettenis@
tested by bluhm@
ok phessler@

Lenovo x13s requires a Qualcomm firmware file which is 13.7MB, so increase
the limit from 5MB to 15MB.

What does it contain? A full copy of Windows VM framework? For now, we
need it to read the battery status...

"go for it" deraadt@

Make sure we don't suspend if we have no way to wake up the machine.
The idea is that device drivers that can wake up the machine register
themselves by calling device_register_wakeup(). To prevent regressions
on amd64, we let acpi(4) register itself as a wakeup device if the AML
for the machine defines wakeup devices. This may be refined in the
future.

This diff will prevent people from suspending their arm64 SBCs without
having a way to wake them up. For now the only driver that registers
itself is axppmic(4), which means that at this moment only SBCs with
an allwinner A64 or H5 SoC will actually support suspend/resume.

ok mlarkin@, deraadt@

Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

Lenovo x13s requires a Qualcomm firmware file which is 13.7MB, so increase
the limit from 5MB to 15MB.

What does it contain? A full copy of Windows VM framework? For now, we
need it to read the battery status...

"go for it" deraadt@

Make sure we don't suspend if we have no way to wake up the machine.
The idea is that device drivers that can wake up the machine register
themselves by calling device_register_wakeup(). To prevent regressions
on amd64, we let acpi(4) register itself as a wakeup device if the AML
for the machine defines wakeup devices. This may be refined in the
future.

This diff will prevent people from suspending their arm64 SBCs without
having a way to wake them up. For now the only driver that registers
itself is axppmic(4), which means that at this moment only SBCs with
an allwinner A64 or H5 SoC will actually support suspend/resume.

ok mlarkin@, deraadt@

Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

Make sure we don't suspend if we have no way to wake up the machine.
The idea is that device drivers that can wake up the machine register
themselves by calling device_register_wakeup(). To prevent regressions
on amd64, we let acpi(4) register itself as a wakeup device if the AML
for the machine defines wakeup devices. This may be refined in the
future.

This diff will prevent people from suspending their arm64 SBCs without
having a way to wake them up. For now the only driver that registers
itself is axppmic(4), which means that at this moment only SBCs with
an allwinner A64 or H5 SoC will actually support suspend/resume.

ok mlarkin@, deraadt@

Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)

intrducing device type DV_SENSOR turned out to be a bad idea as it
affects way more than just hotplug messages. remove DV_SENSOR and use
DV_DULL for the moment. proper solution coming.
discussed with deraadt mk jason

Make sensor add/remove create hotplug events (after much prodding from henning). Idea from mbalmer. 'in it goes!' deraadt.

Remove now unused zeroref member in cfattach structures.

Create the init process earlier, before the root filesystem is mounted,
and have it stall on a semaphore. This allows all kthread creations which
could have been requested during autoconf to be processed before root
is mounted as well.

This causes umass devices attached to any usb with flags 1 (such as on macppc)
to configure properly instead of panicing the kernel at mountroot time.

From NetBSD; tested by various.

firmware loading; ok pedro tedu dlg miod

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

Remove some '#if 0' cruft.

remove last , in enum

config_edit() isn't used anywhere. ok art@

Cosmetic changes only, primarily making comments line up nicely after the
__P removal.

Final __P removal plus some cosmetic fixups

First round of __P removal in sys

branches: 1.20.4;
Add __HAVE_DEVICE_REGISTER to hp300/alpha (sparc64 already had it) and
clean up the arch specific #ifdef's in subr_autoconf.c; from NetBSD.
(tested by me on alpha/sparc64 and miod on hp300)

KNF

Added config_detach_children, config_activate_children.

Added ref counting to devices: device_ref, device_unref and a new method
for devices : ca_zeroref, called when the ref count hits zero.

Note that ca_zeroref may be called from interrupt context.

branches: 1.17.4;
From NetBSD; new device detaching infrastructure.

From NetBSD; config_defer to defer configuration of a device until after all
other siblings.

Remove obsolete detach logic in preparation of a newer one

add autoconfig_verbose toggling command to boot_config

Formerly reuse of unit numbers of detached devices was impossible, with
this change starred devices will search from the first allowed unit for
such devices and up for free units when attaching. This means you have
to rerun config(8) before yopu compile current kernels. FYI, this is
a necessity when doing PCMCIA flashcard reading, otherwise you soon run
out of unit numbers.

I have also added a way to detach all children of a certain device, used
in a new PCMCIA framework to come, so you detach all functions on a
single PCMCIA card when pulling it out.

A few bugs wrt starred devices fixed in the autoconfig_verbose code too.
Last and least, fixed some panic messages.

Back that out, I'm too tired to be messing with this.

Add cf_locnames to struct cfdata.

added const to second parameter of cfprint_t routines

export struct cfdata cfdata[];

provide config_make_softc proto

Added support for user modifiable kernel at boot (-c) /maja

provide locator names to kernel (update your config(8) binary!)

Pull in John Kohl's [jtk@netbsd.org] most recent (15Apr96) APM and PCMCIA work
(original PCMCIA framework by Stefan Grefen [grefen@convex.com]).

partial sync with netbsd 960418, more to come

Merge of NetBSD 960317

From NetBSD: 960217 merge

branches: 1.1.1;
Initial revision

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

The suspend/resume code is a sticky mess of MI, MD, and ACPI sequencing.
This splits out the MI sequencing, backing it with per-architecture helper
functions. Further steps will be neccesary because ACPI and MD are too
tightly coupled, but soon we'll be able to use this code for more architectures
(which depends on figuring out the lowest-level cpu sleeping method)
ok kettenis

Improve unhibernate performance (30% on some machines, another upcoming diff
shows gains up to 50%) by skipping attach of irrelevant devices, which are
tagged CD_SKIPHIBERNATE in the per-driver cfdriver. In particular, usb devices
are not attached, so they don't need to detach during the suspend-unpack-resume.
New bootblocks are required (which tell the kernel it's job is unhibernate
before configure runs)
tested by various

- if_cloners list populated at boot time only then becomes immutable,
so we can let go if_cloners_lock.

OK tb@, claudio@, bluhm@, kn@, henning@

Replace mountroothook_establish(9) by config_mountroot(9) a narrower API
similar to config_defer(9).

ok mikeb@, deraadt@

back out refcnt for dv_ref, there's too many hand crafted devices all
over the tree.

much encouragement from l2k15

use refcnts for the device reference counts as an example of how
refcnt(9) can be used.

Change device locators type from int to long, for the sake of 64-bit ports
without proper device trees.

Be sure to build and install config(8) and rerun it before attempting to build
a kernel.

ok kettenis@ deraadt@ jasper@ visa@

Introduce config_suspend_all(9) a function that invokes config_suspend(9)
on all relevant device hierarchies in the appropriate order. For now this
means mpath(4) and mainbus(4), doing mpath(4) before mainbus(4) when
suspending or powering down and doing mpath(4) after mainbus(4) when
resuming such that mpath(4) can realy on the underlying hardware being
in a functional state.

Fixes problems with unflushed disk caches on machines where mpath(4) takes
control of some of your disks.

ok dlg@

It's been a quarter century: we can assume volatile is present with that name.

ok dlg@ mpi@ deraadt@

get rid of the assumption that the head of the alldevs list is the
"mainbus" device. this breaks when mpath is enabled because it
attaches before mainbus and therefore takes the head position.

have autoconf provide device_mainbus() which looks up mainbus_cd,
and use that instead.

discussed with deraadt who just wants mpath stuff to move forward
despite there being many ways to shine this particular turd.

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

get rid of the goop for maintaining multiple cftables since theres
no current code there to add or remove them. such code was put in
17 years ago, disabled 14 years ago, and removed 11 years ago, so
i suspect we dont really need it or the goop to support it.

very ok miod@

Revamp the sequences for suspend/hibernate -> resume so that the code
paths are reflexive. It is now possible to fail part-way through a
suspend sequence, and recover along the resume code path.
Split DVACT_SUSPEND by adding a new DVACT_POWERDOWN method is used
after hibernate (and suspend too) to finish the job. Some drivers
must be converted at the same time to use this instead of shutdown hooks
(the others will follow at a later time)
ok kettenis mlarkin

Remove config_activate() and DVACT_ACTIVATE. PCMCIA's the only thing
that's ever used it, and it's long since been changed to use
DVACT_{QUIESCE,SUSPEND,RESUME} instead.

ok deraadt@, dlg@; miod@ also agreed with this idea when I brought it
up a few weeks ago

Kill the nearly-15-years-dead cf_ivstubs field from struct cfdata.

ok miod@, deraadt@

N.B.: If you're following -current, you MUST recompile config(8) and
re-config your kernel or else ioconf.c will fail to compile.

Add DVACT_QUIECE support. This is called before splhigh() and before
DVACT_SUSPEND, therefore DVACT_QUIECE can do standard sleeping operations
to get ready.
Discussed quite a while back with kettenis and jakemsr, oga suddenly needed
it as well and wrote half of it, so it was time to finish it.
proofread by miod.

Make config_activate_children() more useable as a suspend-and-resume
device tree walker, and add config_suspend() as well.
ok mlarkin pirofti, discussion with kettenis

Forgot the declarations in former commit. From martin@, okay oga@.

Add basic suspend/resume autoconf functionality.

Okay deraadt@, kettenis@, mlarkin@.

Get rid of devact enum, substitute it with an int and coresponding defines.

This is needed for the addition of further suspend/resume actions.

Okay deraadt@, marco@.

we dont need ot include sys/lock.h here

ok miod@ krw@

kill __HAVE_DEVICE_REGISTER by requiring all architectures to have a
device_register() function -- even if it does nothing. reduces the
cpp-based blather different between architectures
idea ok'd by miod; tested on all architectures (except a few miod will
need to cleanup because he has them)

evcnt & friends were replaced by a proper interrupt counting mechanism 3 years ago; ok miod

make findblkmajor() and findblkname() MI; ok miod

setroot() was a ugly mix of MI and MD code, with different bugs on different
machines. Instead -- build one solid clean MI version, and thenchange all
the architectures to use it. ok various people, tested on almost all cases.
(it is a 10094 line diff..)