kern: Make fileops and filterops tables const where possible

No functional change intended.

MFC after: 1 week

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

evdev: Multitouch code style changes.

1. Move touch count reporting helpers to utils. They are not multitouch.
2. Use evdev_mt prefix for private multitouch support routines.
3. Use int instead of i

evdev: Multitouch code style changes.

1. Move touch count reporting helpers to utils. They are not multitouch.
2. Use evdev_mt prefix for private multitouch support routines.
3. Use int instead of int32_t where fixed size is not required.
4. Export some internal functions.

This change should be no-op.

MFC after: 2 weeks

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evdev: Make variable-size ioctls return actual length of copyouted data

on success instead of 0 to match Linux.
Imprivata binary depends on this.

Submitted by: Shunchao Hu <ankohuu_outlook.com>
Rev

evdev: Make variable-size ioctls return actual length of copyouted data

on success instead of 0 to match Linux.
Imprivata binary depends on this.

Submitted by: Shunchao Hu <ankohuu_outlook.com>
Reviewed by: wulf
Differential revision: https://reviews.freebsd.org/D28218

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hid: Add missing input enter/exit epoch pairs.

This was affecting unloading keyboard driver and kdb-related code.

evdev: Allow open() handler to be interrupted by a signal

It is possible that the client list lock is taken by other process for too
long due to e.g. IO timeouts. Allow user to terminate open() in t

evdev: Allow open() handler to be interrupted by a signal

It is possible that the client list lock is taken by other process for too
long due to e.g. IO timeouts. Allow user to terminate open() in this case.

Reviewed by: markj (as part of D27865)

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evdev: Make open(2) and close(3) handlers sleepable.

At the beginning of evdev there was a LOR between hardware driver's and
evdev client list locks as they were taken in different order at
driver's

evdev: Make open(2) and close(3) handlers sleepable.

At the beginning of evdev there was a LOR between hardware driver's and
evdev client list locks as they were taken in different order at
driver's interrupt and evdev open()/close() handlers.

The LOR was fixed with introduction of evdev_register_mtx() function
which allowed to use a hardware driver's lock as evdev client list lock.
While this works good with PS/2 and USB, this does not work with I2C.
Unlike PS/2 and USB, I2C open()/close() handlers do unbound sleeps
while waiting for I2C bus to release and while performing IO.
This change uses epoch(9) for traversing evdev client list in interrupt
handler to avoid the LOR thus making possible to convert evdev client
list lock to sleepable sx.

While here add brief locking protocol description.

Reviewed by: markj
Differential revision: https://reviews.freebsd.org/D27865

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evdev: return error rather than zero-length data on blocked read()

if blocked process has been woken up by evdev device destruction.

MFC after: 2 weeks

evdev: Add COMPAT_FREEBSD32 support for amd64 arch

Incompatibility between i386 and amd64 evdev ABIs was caused by presence of
'struct timeval' in evdev protocol. Replace it with 'struct timeval32'

evdev: Add COMPAT_FREEBSD32 support for amd64 arch

Incompatibility between i386 and amd64 evdev ABIs was caused by presence of
'struct timeval' in evdev protocol. Replace it with 'struct timeval32' for
32 bit binaries.

Big-endian platforms may require additional work due to bitstr_t (array of
unsigned longs) usage in ioctl interface.

MFC after: 2 weeks

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Merge ^/head r339813 through r340125.

evdev: disable evdev if it is invoked from KDB or panic context

This allow to prevent deadlock on entering KDB if one of evdev locks is
already taken by userspace process.

Also this change discards

evdev: disable evdev if it is invoked from KDB or panic context

This allow to prevent deadlock on entering KDB if one of evdev locks is
already taken by userspace process.

Also this change discards all but LED console events produced by KDB as
unrelated to userspace.

Tested by: dumbbell (as part of D15070)
Objected by: bde (as 'KDB lock an already locked mutex' problem solution)
MFC after: 1 month

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Merge ^/head r337646 through r338014.

evdev: remove soft context from evdev methods parameter list.

Now softc should be retrieved from struct edvev * pointer
with evdev_get_softc() helper.

wmt(4) is a sample of driver that support both

evdev: remove soft context from evdev methods parameter list.

Now softc should be retrieved from struct edvev * pointer
with evdev_get_softc() helper.

wmt(4) is a sample of driver that support both KPI.

Reviewed by: hselasky, gonzo
Differential Revision: https://reviews.freebsd.org/D16614

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Merge ^/head r321383 through r322397.

MFhead@r320180

Change my email address to wulf@FreeBSD.org in copyright headers.

Approved by: gonzo (mentor)
MFC after: 2 weeks

evdev: style(9), sort headers alphabetically

Pointed out by: bde
Reviewed by: gonzo
Approved by: gonzo (mentor)
MFC after: 2 weeks

[evdev] Fix race condition between client's event queue reading and dropping

Submitted by: Vladimir Kondratiev <wulf@cicgroup.ru>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org

[evdev] Fix race condition between client's event queue reading and dropping

Submitted by: Vladimir Kondratiev <wulf@cicgroup.ru>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D9320

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Merge ^/head r305687 through r305890.

Remove semicolon from the end of the macro definition

Reported by: hans

Add evdev protocol implementation

evdev is a generic input event interface compatible with Linux
evdev API at ioctl level. It allows using unmodified (apart from
header name) input evdev drivers in

Add evdev protocol implementation

evdev is a generic input event interface compatible with Linux
evdev API at ioctl level. It allows using unmodified (apart from
header name) input evdev drivers in Xorg, Wayland, Qt.

This commit has only generic kernel API. evdev support for individual
hardware drivers like ukbd, ums, atkbd, etc. will be committed later.

Project was started by Jakub Klama as part of GSoC 2014. Jakub's
evdev implementation was later used as a base, updated and finished
by Vladimir Kondratiev.

Submitted by: Vladimir Kondratiev <wulf@cicgroup.ru>
Reviewed by: adrian, hans
Differential Revision: https://reviews.freebsd.org/D6998

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