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#define SJA1105_DEFAULT_VLAN                    (VLAN_N_VID - 1)
  20
  21/* IEEE 802.3 Annex 57A: Slow Protocols PDUs (01:80:C2:xx:xx:xx) */
  22#define SJA1105_LINKLOCAL_FILTER_A              0x0180C2000000ull
  23#define SJA1105_LINKLOCAL_FILTER_A_MASK         0xFFFFFF000000ull
  24/* IEEE 1588 Annex F: Transport of PTP over Ethernet (01:1B:19:xx:xx:xx) */
  25#define SJA1105_LINKLOCAL_FILTER_B              0x011B19000000ull
  26#define SJA1105_LINKLOCAL_FILTER_B_MASK         0xFFFFFF000000ull
  27
  28/* Source and Destination MAC of follow-up meta frames.
  29 * Whereas the choice of SMAC only affects the unique identification of the
  30 * switch as sender of meta frames, the DMAC must be an address that is present
  31 * in the DSA master port's multicast MAC filter.
  32 * 01-80-C2-00-00-0E is a good choice for this, as all profiles of IEEE 1588
  33 * over L2 use this address for some purpose already.
  34 */
  35#define SJA1105_META_SMAC                       0x222222222222ull
  36#define SJA1105_META_DMAC                       0x0180C200000Eull
  37
  38#define SJA1105_HWTS_RX_EN                      0
  39
  40/* Global tagger data: each struct sja1105_port has a reference to
  41 * the structure defined in struct sja1105_private.
  42 */
  43struct sja1105_tagger_data {
  44        struct sk_buff *stampable_skb;
  45        /* Protects concurrent access to the meta state machine
  46         * from taggers running on multiple ports on SMP systems
  47         */
  48        spinlock_t meta_lock;
  49        unsigned long state;
  50        u8 ts_id;
  51        /* Used on SJA1110 where meta frames are generated only for
  52         * 2-step TX timestamps
  53         */
  54        struct sk_buff_head skb_txtstamp_queue;
  55};
  56
  57struct sja1105_skb_cb {
  58        struct sk_buff *clone;
  59        u64 tstamp;
  60        /* Only valid for packets cloned for 2-step TX timestamping */
  61        u8 ts_id;
  62};
  63
  64#define SJA1105_SKB_CB(skb) \
  65        ((struct sja1105_skb_cb *)((skb)->cb))
  66
  67struct sja1105_port {
  68        struct kthread_worker *xmit_worker;
  69        struct kthread_work xmit_work;
  70        struct sk_buff_head xmit_queue;
  71        struct sja1105_tagger_data *data;
  72        struct dsa_port *dp;
  73        bool hwts_tx_en;
  74};
  75
  76/* Timestamps are in units of 8 ns clock ticks (equivalent to
  77 * a fixed 125 MHz clock).
  78 */
  79#define SJA1105_TICK_NS                 8
  80
  81static inline s64 ns_to_sja1105_ticks(s64 ns)
  82{
  83        return ns / SJA1105_TICK_NS;
  84}
  85
  86static inline s64 sja1105_ticks_to_ns(s64 ticks)
  87{
  88        return ticks * SJA1105_TICK_NS;
  89}
  90
  91static inline bool dsa_port_is_sja1105(struct dsa_port *dp)
  92{
  93        return true;
  94}
  95
  96#endif /* _NET_DSA_SJA1105_H */
  97