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  */
  43 struct 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 };
  52
  53 struct sja1105_skb_cb {
  54         struct sk_buff *clone;
  55         u64 tstamp;
  56         /* Only valid for packets cloned for 2-step TX timestamping */
  57         u8 ts_id;
  58 };
  59
  60 #define SJA1105_SKB_CB(skb) \
  61         ((struct sja1105_skb_cb *)((skb)->cb))
  62
  63 struct sja1105_port {
  64         struct kthread_worker *xmit_worker;
  65         struct kthread_work xmit_work;
  66         struct sk_buff_head xmit_queue;
  67         struct sja1105_tagger_data *data;
  68         struct dsa_port *dp;
  69         bool hwts_tx_en;
  70 };
  71
  72 enum 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
  79 void 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
  84 static 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 #if IS_ENABLED(CONFIG_NET_DSA_SJA1105)
  93
  94 extern const struct dsa_switch_ops sja1105_switch_ops;
  95
  96 static inline bool dsa_port_is_sja1105(struct dsa_port *dp)
  97 {
  98         return dp->ds->ops == &sja1105_switch_ops;
  99 }
 100
 101 #else
 102
 103 static inline bool dsa_port_is_sja1105(struct dsa_port *dp)
 104 {
 105         return false;
 106 }
 107
 108 #endif
 109
 110 #endif /* _NET_DSA_SJA1105_H */