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 */