LXR linux/drivers/net/dsa/sja1105/sja1105

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (c) 2019, Vladimir Oltean <olteanv@gmail.com>
   3 */
   4#ifndef _SJA1105_TAS_H
   5#define _SJA1105_TAS_H
   6
   7#include <net/pkt_sched.h>
   8
   9#define SJA1105_TAS_MAX_DELTA           BIT(18)
  10
  11struct sja1105_private;
  12
  13#if IS_ENABLED(CONFIG_NET_DSA_SJA1105_TAS)
  14
  15enum sja1105_tas_state {
  16        SJA1105_TAS_STATE_DISABLED,
  17        SJA1105_TAS_STATE_ENABLED_NOT_RUNNING,
  18        SJA1105_TAS_STATE_RUNNING,
  19};
  20
  21enum sja1105_ptp_op {
  22        SJA1105_PTP_NONE,
  23        SJA1105_PTP_CLOCKSTEP,
  24        SJA1105_PTP_ADJUSTFREQ,
  25};
  26
  27struct sja1105_gate_entry {
  28        struct list_head list;
  29        struct sja1105_rule *rule;
  30        s64 interval;
  31        u8 gate_state;
  32};
  33
  34struct sja1105_gating_config {
  35        u64 cycle_time;
  36        s64 base_time;
  37        int num_entries;
  38        struct list_head entries;
  39};
  40
  41struct sja1105_tas_data {
  42        struct tc_taprio_qopt_offload *offload[SJA1105_MAX_NUM_PORTS];
  43        struct sja1105_gating_config gating_cfg;
  44        enum sja1105_tas_state state;
  45        enum sja1105_ptp_op last_op;
  46        struct work_struct tas_work;
  47        s64 earliest_base_time;
  48        s64 oper_base_time;
  49        u64 max_cycle_time;
  50        bool enabled;
  51};
  52
  53int sja1105_setup_tc_taprio(struct dsa_switch *ds, int port,
  54                            struct tc_taprio_qopt_offload *admin);
  55
  56void sja1105_tas_setup(struct dsa_switch *ds);
  57
  58void sja1105_tas_teardown(struct dsa_switch *ds);
  59
  60void sja1105_tas_clockstep(struct dsa_switch *ds);
  61
  62void sja1105_tas_adjfreq(struct dsa_switch *ds);
  63
  64bool sja1105_gating_check_conflicts(struct sja1105_private *priv, int port,
  65                                    struct netlink_ext_ack *extack);
  66
  67int sja1105_init_scheduling(struct sja1105_private *priv);
  68
  69#else
  70
  71/* C doesn't allow empty structures, bah! */
  72struct sja1105_tas_data {
  73        u8 dummy;
  74};
  75
  76static inline int sja1105_setup_tc_taprio(struct dsa_switch *ds, int port,
  77                                          struct tc_taprio_qopt_offload *admin)
  78{
  79        return -EOPNOTSUPP;
  80}
  81
  82static inline void sja1105_tas_setup(struct dsa_switch *ds) { }
  83
  84static inline void sja1105_tas_teardown(struct dsa_switch *ds) { }
  85
  86static inline void sja1105_tas_clockstep(struct dsa_switch *ds) { }
  87
  88static inline void sja1105_tas_adjfreq(struct dsa_switch *ds) { }
  89
  90static inline bool
  91sja1105_gating_check_conflicts(struct dsa_switch *ds, int port,
  92                               struct netlink_ext_ack *extack)
  93{
  94        return true;
  95}
  96
  97static inline int sja1105_init_scheduling(struct sja1105_private *priv)
  98{
  99        return 0;
 100}
 101
 102#endif /* IS_ENABLED(CONFIG_NET_DSA_SJA1105_TAS) */
 103
 104#endif /* _SJA1105_TAS_H */
 105