include/net/ieee8021q.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (c) 2024 Pengutronix, Oleksij Rempel <kernel@pengutronix.de> */
   3
   4 #ifndef _NET_IEEE8021Q_H
   5 #define _NET_IEEE8021Q_H
   6
   7 #include <linux/errno.h>
   8
   9 /**
  10  * enum ieee8021q_traffic_type - 802.1Q traffic type priority values (802.1Q-2022)
  11  *
  12  * @IEEE8021Q_TT_BK: Background
  13  * @IEEE8021Q_TT_BE: Best Effort (default). According to 802.1Q-2022, BE is 0
  14  * but has higher priority than BK which is 1.
  15  * @IEEE8021Q_TT_EE: Excellent Effort
  16  * @IEEE8021Q_TT_CA: Critical Applications
  17  * @IEEE8021Q_TT_VI: Video, < 100 ms latency and jitter
  18  * @IEEE8021Q_TT_VO: Voice, < 10 ms latency and jitter
  19  * @IEEE8021Q_TT_IC: Internetwork Control
  20  * @IEEE8021Q_TT_NC: Network Control
  21  */
  22 enum ieee8021q_traffic_type {
  23         IEEE8021Q_TT_BK = 0,
  24         IEEE8021Q_TT_BE = 1,
  25         IEEE8021Q_TT_EE = 2,
  26         IEEE8021Q_TT_CA = 3,
  27         IEEE8021Q_TT_VI = 4,
  28         IEEE8021Q_TT_VO = 5,
  29         IEEE8021Q_TT_IC = 6,
  30         IEEE8021Q_TT_NC = 7,
  31
  32         /* private: */
  33         IEEE8021Q_TT_MAX,
  34 };
  35
  36 #define SIMPLE_IETF_DSCP_TO_IEEE8021Q_TT(dscp)          ((dscp >> 3) & 0x7)
  37
  38 #if IS_ENABLED(CONFIG_NET_IEEE8021Q_HELPERS)
  39
  40 int ietf_dscp_to_ieee8021q_tt(u8 dscp);
  41 int ieee8021q_tt_to_tc(enum ieee8021q_traffic_type tt, unsigned int num_queues);
  42
  43 #else
  44
  45 static inline int ietf_dscp_to_ieee8021q_tt(u8 dscp)
  46 {
  47         return -EOPNOTSUPP;
  48 }
  49
  50 static inline int ieee8021q_tt_to_tc(enum ieee8021q_traffic_type tt,
  51                                      unsigned int num_queues)
  52 {
  53         return -EOPNOTSUPP;
  54 }
  55
  56 #endif
  57 #endif /* _NET_IEEE8021Q_H */