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_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 
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