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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>
143 lines
3.9 KiB
C
143 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* linux/can/netlink.h
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*
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* Definitions for the CAN netlink interface
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*
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* Copyright (c) 2009 Wolfgang Grandegger <wg@grandegger.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the version 2 of the GNU General Public License
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _UAPI_CAN_NETLINK_H
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#define _UAPI_CAN_NETLINK_H
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#include <linux/types.h>
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/*
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* CAN bit-timing parameters
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*
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* For further information, please read chapter "8 BIT TIMING
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* REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
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* at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
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*/
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struct can_bittiming {
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__u32 bitrate; /* Bit-rate in bits/second */
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__u32 sample_point; /* Sample point in one-tenth of a percent */
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__u32 tq; /* Time quanta (TQ) in nanoseconds */
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__u32 prop_seg; /* Propagation segment in TQs */
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__u32 phase_seg1; /* Phase buffer segment 1 in TQs */
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__u32 phase_seg2; /* Phase buffer segment 2 in TQs */
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__u32 sjw; /* Synchronisation jump width in TQs */
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__u32 brp; /* Bit-rate prescaler */
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};
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/*
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* CAN harware-dependent bit-timing constant
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*
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* Used for calculating and checking bit-timing parameters
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*/
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struct can_bittiming_const {
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char name[16]; /* Name of the CAN controller hardware */
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__u32 tseg1_min; /* Time segement 1 = prop_seg + phase_seg1 */
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__u32 tseg1_max;
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__u32 tseg2_min; /* Time segement 2 = phase_seg2 */
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__u32 tseg2_max;
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__u32 sjw_max; /* Synchronisation jump width */
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__u32 brp_min; /* Bit-rate prescaler */
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__u32 brp_max;
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__u32 brp_inc;
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};
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/*
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* CAN clock parameters
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*/
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struct can_clock {
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__u32 freq; /* CAN system clock frequency in Hz */
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};
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/*
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* CAN operational and error states
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*/
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enum can_state {
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CAN_STATE_ERROR_ACTIVE = 0, /* RX/TX error count < 96 */
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CAN_STATE_ERROR_WARNING, /* RX/TX error count < 128 */
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CAN_STATE_ERROR_PASSIVE, /* RX/TX error count < 256 */
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CAN_STATE_BUS_OFF, /* RX/TX error count >= 256 */
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CAN_STATE_STOPPED, /* Device is stopped */
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CAN_STATE_SLEEPING, /* Device is sleeping */
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CAN_STATE_MAX
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};
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/*
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* CAN bus error counters
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*/
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struct can_berr_counter {
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__u16 txerr;
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__u16 rxerr;
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};
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/*
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* CAN controller mode
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*/
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struct can_ctrlmode {
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__u32 mask;
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__u32 flags;
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};
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#define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */
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#define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */
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#define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */
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#define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */
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#define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */
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#define CAN_CTRLMODE_FD 0x20 /* CAN FD mode */
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#define CAN_CTRLMODE_PRESUME_ACK 0x40 /* Ignore missing CAN ACKs */
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#define CAN_CTRLMODE_FD_NON_ISO 0x80 /* CAN FD in non-ISO mode */
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/*
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* CAN device statistics
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*/
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struct can_device_stats {
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__u32 bus_error; /* Bus errors */
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__u32 error_warning; /* Changes to error warning state */
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__u32 error_passive; /* Changes to error passive state */
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__u32 bus_off; /* Changes to bus off state */
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__u32 arbitration_lost; /* Arbitration lost errors */
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__u32 restarts; /* CAN controller re-starts */
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};
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/*
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* CAN netlink interface
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*/
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enum {
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IFLA_CAN_UNSPEC,
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IFLA_CAN_BITTIMING,
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IFLA_CAN_BITTIMING_CONST,
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IFLA_CAN_CLOCK,
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IFLA_CAN_STATE,
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IFLA_CAN_CTRLMODE,
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IFLA_CAN_RESTART_MS,
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IFLA_CAN_RESTART,
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IFLA_CAN_BERR_COUNTER,
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IFLA_CAN_DATA_BITTIMING,
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IFLA_CAN_DATA_BITTIMING_CONST,
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IFLA_CAN_TERMINATION,
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IFLA_CAN_TERMINATION_CONST,
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IFLA_CAN_BITRATE_CONST,
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IFLA_CAN_DATA_BITRATE_CONST,
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__IFLA_CAN_MAX
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};
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#define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1)
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/* u16 termination range: 1..65535 Ohms */
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#define CAN_TERMINATION_DISABLED 0
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#endif /* !_UAPI_CAN_NETLINK_H */
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