src/sys/dev/evdev/cdev.c, branch release/12.3.0

MFC r359428:

2020-04-13T22:18:49Z

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 r359429: evdev: return error rather than zero-length data on blocked read() if blocked process has been woken up by evdev device destruction.

MFC r339823:

2018-11-17T20:18:15Z

evdev: Use console lock as evdev lock for all supported keyboard drivers. Now evdev part of keyboard drivers does not take any locks if corresponding input/eventN device node is not opened by userland consumers. Do not assert console lock inside evdev to handle the cases when keyboard driver is called from some special single-threaded context like shutdown thread. MFC r339824: 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.

evdev: remove soft context from evdev methods parameter list.

2018-08-13T19:00:42Z

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

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

2017-07-23T20:41:58Z

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

evdev: style(9), sort headers alphabetically

2017-07-23T20:32:54Z

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

2017-03-12T19:27:44Z

Submitted by: Vladimir Kondratiev MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D9320

Remove semicolon from the end of the macro definition

2016-09-12T17:29:20Z

Reported by: hans

Add evdev protocol implementation

2016-09-11T18:56:38Z

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 Reviewed by: adrian, hans Differential Revision: https://reviews.freebsd.org/D6998