LXR linux/include/linux/dsa/sja1105.h

   1/* SPDX-License-Identifier: GPL-2.0
   2 * Copyright (c) 2019, Vladimir Oltean <olteanv@gmail.com>
   3 */
   4
   5/* Included by drivers/net/dsa/sja1105/sja1105.h and net/dsa/tag_sja1105.c */
   6
   7#ifndef _NET_DSA_SJA1105_H
   8#define _NET_DSA_SJA1105_H
   9
  10#include <linux/skbuff.h>
  11#include <linux/etherdevice.h>
  12#include <linux/dsa/8021q.h>
  13#include <net/dsa.h>
  14
  15#define ETH_P_SJA1105                           ETH_P_DSA_8021Q
  16#define ETH_P_SJA1105_META                      0x0008
  17#define ETH_P_SJA1110                           0xdadc
  18
  19/* IEEE 802.3 Annex 57A: Slow Protocols PDUs (01:80:C2:xx:xx:xx) */
  20#define SJA1105_LINKLOCAL_FILTER_A              0x0180C2000000ull
  21#define SJA1105_LINKLOCAL_FILTER_A_MASK         0xFFFFFF000000ull
  22/* IEEE 1588 Annex F: Transport of PTP over Ethernet (01:1B:19:xx:xx:xx) */
  23#define SJA1105_LINKLOCAL_FILTER_B              0x011B19000000ull
  24#define SJA1105_LINKLOCAL_FILTER_B_MASK         0xFFFFFF000000ull
  25
  26/* Source and Destination MAC of follow-up meta frames.
  27 * Whereas the choice of SMAC only affects the unique identification of the
  28 * switch as sender of meta frames, the DMAC must be an address that is present
  29 * in the DSA master port's multicast MAC filter.
  30 * 01-80-C2-00-00-0E is a good choice for this, as all profiles of IEEE 1588
  31 * over L2 use this address for some purpose already.
  32 */
  33#define SJA1105_META_SMAC                       0x222222222222ull
  34#define SJA1105_META_DMAC                       0x0180C200000Eull
  35
  36#define SJA1105_HWTS_RX_EN                      0
  37
  38/* Global tagger data: each struct sja1105_port has a reference to
  39 * the structure defined in struct sja1105_private.
  40 */
  41struct sja1105_tagger_data {
  42        struct sk_buff *stampable_skb;
  43        /* Protects concurrent access to the meta state machine
  44         * from taggers running on multiple ports on SMP systems
  45         */
  46        spinlock_t meta_lock;
  47        unsigned long state;
  48        u8 ts_id;
  49};
  50
  51struct sja1105_skb_cb {
  52        struct sk_buff *clone;
  53        u64 tstamp;
  54        /* Only valid for packets cloned for 2-step TX timestamping */
  55        u8 ts_id;
  56};
  57
  58#define SJA1105_SKB_CB(skb) \
  59        ((struct sja1105_skb_cb *)((skb)->cb))
  60
  61struct sja1105_port {
  62        u16 subvlan_map[DSA_8021Q_N_SUBVLAN];
  63        struct kthread_worker *xmit_worker;
  64        struct kthread_work xmit_work;
  65        struct sk_buff_head xmit_queue;
  66        struct sja1105_tagger_data *data;
  67        struct dsa_port *dp;
  68        bool hwts_tx_en;
  69        u16 xmit_tpid;
  70};
  71
  72enum sja1110_meta_tstamp {
  73        SJA1110_META_TSTAMP_TX = 0,
  74        SJA1110_META_TSTAMP_RX = 1,
  75};
  76
  77#if IS_ENABLED(CONFIG_NET_DSA_SJA1105_PTP)
  78
  79void sja1110_process_meta_tstamp(struct dsa_switch *ds, int port, u8 ts_id,
  80                                 enum sja1110_meta_tstamp dir, u64 tstamp);
  81
  82#else
  83
  84static inline void sja1110_process_meta_tstamp(struct dsa_switch *ds, int port,
  85                                               u8 ts_id, enum sja1110_meta_tstamp dir,
  86                                               u64 tstamp)
  87{
  88}
  89
  90#endif /* IS_ENABLED(CONFIG_NET_DSA_SJA1105_PTP) */
  91
  92#endif /* _NET_DSA_SJA1105_H */
  93