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IEEE 802.1q specification provides recommendation and examples which can be used as good default values for different drivers. This patch implements mapping examples documented in IEEE 802.1Q-2022 in Annex I "I.3 Traffic type to traffic class mapping" and IETF DSCP naming and mapping DSCP to Traffic Type inspired by RFC8325. This helpers will be used in followup patches for dsa/microchip DCB implementation. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2024 Pengutronix, Oleksij Rempel <kernel@pengutronix.de> */
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#ifndef _NET_IEEE8021Q_H
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#define _NET_IEEE8021Q_H
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#include <linux/errno.h>
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/**
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* enum ieee8021q_traffic_type - 802.1Q traffic type priority values (802.1Q-2022)
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*
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* @IEEE8021Q_TT_BK: Background
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* @IEEE8021Q_TT_BE: Best Effort (default). According to 802.1Q-2022, BE is 0
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* but has higher priority than BK which is 1.
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* @IEEE8021Q_TT_EE: Excellent Effort
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* @IEEE8021Q_TT_CA: Critical Applications
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* @IEEE8021Q_TT_VI: Video, < 100 ms latency and jitter
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* @IEEE8021Q_TT_VO: Voice, < 10 ms latency and jitter
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* @IEEE8021Q_TT_IC: Internetwork Control
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* @IEEE8021Q_TT_NC: Network Control
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*/
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enum ieee8021q_traffic_type {
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IEEE8021Q_TT_BK = 0,
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IEEE8021Q_TT_BE = 1,
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IEEE8021Q_TT_EE = 2,
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IEEE8021Q_TT_CA = 3,
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IEEE8021Q_TT_VI = 4,
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IEEE8021Q_TT_VO = 5,
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IEEE8021Q_TT_IC = 6,
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IEEE8021Q_TT_NC = 7,
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/* private: */
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IEEE8021Q_TT_MAX,
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};
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#define SIMPLE_IETF_DSCP_TO_IEEE8021Q_TT(dscp) ((dscp >> 3) & 0x7)
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#if IS_ENABLED(CONFIG_NET_IEEE8021Q_HELPERS)
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int ietf_dscp_to_ieee8021q_tt(u8 dscp);
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int ieee8021q_tt_to_tc(enum ieee8021q_traffic_type tt, unsigned int num_queues);
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#else
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static inline int ietf_dscp_to_ieee8021q_tt(u8 dscp)
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{
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return -EOPNOTSUPP;
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}
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static inline int ieee8021q_tt_to_tc(enum ieee8021q_traffic_type tt,
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unsigned int num_queues)
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{
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return -EOPNOTSUPP;
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}
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#endif
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#endif /* _NET_IEEE8021Q_H */
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