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e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Intel Multimedia Timer device interface
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved.
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*
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* This file should define an interface compatible with the IA-PC Multimedia
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* Timers Draft Specification (rev. 0.97) from Intel. Note that some
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* hardware may not be able to safely export its registers to userspace,
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* so the ioctl interface should support all necessary functionality.
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*
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* 11/01/01 - jbarnes - initial revision
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* 9/10/04 - Christoph Lameter - remove interrupt support
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* 9/17/04 - jbarnes - remove test program, move some #defines to the driver
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*/
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#ifndef _LINUX_MMTIMER_H
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#define _LINUX_MMTIMER_H
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/*
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* Breakdown of the ioctl's available. An 'optional' next to the command
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* indicates that supporting this command is optional, while 'required'
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* commands must be implemented if conformance is desired.
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*
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* MMTIMER_GETOFFSET - optional
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* Should return the offset (relative to the start of the page where the
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* registers are mapped) for the counter in question.
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*
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* MMTIMER_GETRES - required
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* The resolution of the clock in femto (10^-15) seconds
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*
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* MMTIMER_GETFREQ - required
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* Frequency of the clock in Hz
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*
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* MMTIMER_GETBITS - required
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* Number of bits in the clock's counter
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*
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* MMTIMER_MMAPAVAIL - required
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* Returns nonzero if the registers can be mmap'd into userspace, 0 otherwise
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*
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* MMTIMER_GETCOUNTER - required
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* Gets the current value in the counter
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*/
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#define MMTIMER_IOCTL_BASE 'm'
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#define MMTIMER_GETOFFSET _IO(MMTIMER_IOCTL_BASE, 0)
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#define MMTIMER_GETRES _IOR(MMTIMER_IOCTL_BASE, 1, unsigned long)
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#define MMTIMER_GETFREQ _IOR(MMTIMER_IOCTL_BASE, 2, unsigned long)
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#define MMTIMER_GETBITS _IO(MMTIMER_IOCTL_BASE, 4)
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#define MMTIMER_MMAPAVAIL _IO(MMTIMER_IOCTL_BASE, 6)
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#define MMTIMER_GETCOUNTER _IOR(MMTIMER_IOCTL_BASE, 9, unsigned long)
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#endif /* _LINUX_MMTIMER_H */
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