drivers/net/dsa/sja1105/sja1105_tas.h

   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
  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
  82 static inline void sja1105_tas_setup(struct dsa_switch *ds) { }
  83
  84 static inline void sja1105_tas_teardown(struct dsa_switch *ds) { }
  85
  86 static inline void sja1105_tas_clockstep(struct dsa_switch *ds) { }
  87
  88 static inline void sja1105_tas_adjfreq(struct dsa_switch *ds) { }
  89
  90 static inline bool
  91 sja1105_gating_check_conflicts(struct dsa_switch *ds, int port,
  92                                struct netlink_ext_ack *extack)
  93 {
  94         return true;
  95 }
  96
  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 */