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
11 struct sja1105_private;
12
13 #if IS_ENABLED(CONFIG_NET_DSA_SJA1105_TAS)
14
15 enum sja1105_tas_state {
16 SJA1105_TAS_STATE_DISABLED,
17 SJA1105_TAS_STATE_ENABLED_NOT_RUNNING,
18 SJA1105_TAS_STATE_RUNNING,
19 };
20
21 enum sja1105_ptp_op {
22 SJA1105_PTP_NONE,
23 SJA1105_PTP_CLOCKSTEP,
24 SJA1105_PTP_ADJUSTFREQ,
25 };
26
27 struct sja1105_gate_entry {
28 struct list_head list;
29 struct sja1105_rule *rule;
30 s64 interval;
31 u8 gate_state;
32 };
33
34 struct sja1105_gating_config {
35 u64 cycle_time;
36 s64 base_time;
37 int num_entries;
38 struct list_head entries;
39 };
40
41 struct sja1105_tas_data {
42 struct tc_taprio_qopt_offload *offload[SJA1105_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
53 int sja1105_setup_tc_taprio(struct dsa_switch *ds, int port,
54 struct tc_taprio_qopt_offload *admin);
55
56 void sja1105_tas_setup(struct dsa_switch *ds);
57
58 void sja1105_tas_teardown(struct dsa_switch *ds);
59
60 void sja1105_tas_clockstep(struct dsa_switch *ds);
61
62 void sja1105_tas_adjfreq(struct dsa_switch *ds);
63
64 bool sja1105_gating_check_conflicts(struct sja1105_private *priv, int port,
65 struct netlink_ext_ack *extack);
66
67 int sja1105_init_scheduling(struct sja1105_private *priv);
68
69 #else
70
71 /* C doesn't allow empty structures, bah! */
72 struct sja1105_tas_data {
73 u8 dummy;
74 };
75
sja1105_setup_tc_taprio(struct dsa_switch * ds,int port,struct tc_taprio_qopt_offload * admin)76 static 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
sja1105_tas_setup(struct dsa_switch * ds)82 static inline void sja1105_tas_setup(struct dsa_switch *ds) { }
83
sja1105_tas_teardown(struct dsa_switch * ds)84 static inline void sja1105_tas_teardown(struct dsa_switch *ds) { }
85
sja1105_tas_clockstep(struct dsa_switch * ds)86 static inline void sja1105_tas_clockstep(struct dsa_switch *ds) { }
87
sja1105_tas_adjfreq(struct dsa_switch * ds)88 static inline void sja1105_tas_adjfreq(struct dsa_switch *ds) { }
89
90 static inline bool
sja1105_gating_check_conflicts(struct dsa_switch * ds,int port,struct netlink_ext_ack * extack)91 sja1105_gating_check_conflicts(struct dsa_switch *ds, int port,
92 struct netlink_ext_ack *extack)
93 {
94 return true;
95 }
96
sja1105_init_scheduling(struct sja1105_private * priv)97 static 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