/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019, Vladimir Oltean <olteanv@gmail.com>
 */
#ifndef _SJA1105_TAS_H
#define _SJA1105_TAS_H

#include <net/pkt_sched.h>

#define SJA1105_TAS_MAX_DELTA           BIT(18)

struct sja1105_private;

#if IS_ENABLED(CONFIG_NET_DSA_SJA1105_TAS)

enum sja1105_tas_state {
        SJA1105_TAS_STATE_DISABLED,
        SJA1105_TAS_STATE_ENABLED_NOT_RUNNING,
        SJA1105_TAS_STATE_RUNNING,
};

enum sja1105_ptp_op {
        SJA1105_PTP_NONE,
        SJA1105_PTP_CLOCKSTEP,
        SJA1105_PTP_ADJUSTFREQ,
};

struct sja1105_gate_entry {
        struct list_head list;
        struct sja1105_rule *rule;
        s64 interval;
        u8 gate_state;
};

struct sja1105_gating_config {
        u64 cycle_time;
        s64 base_time;
        int num_entries;
        struct list_head entries;
};

struct sja1105_tas_data {
        struct tc_taprio_qopt_offload *offload[SJA1105_MAX_NUM_PORTS];
        struct sja1105_gating_config gating_cfg;
        enum sja1105_tas_state state;
        enum sja1105_ptp_op last_op;
        struct work_struct tas_work;
        s64 earliest_base_time;
        s64 oper_base_time;
        u64 max_cycle_time;
        bool enabled;
};

int sja1105_setup_tc_taprio(struct dsa_switch *ds, int port,
                            struct tc_taprio_qopt_offload *admin);

void sja1105_tas_setup(struct dsa_switch *ds);

void sja1105_tas_teardown(struct dsa_switch *ds);

void sja1105_tas_clockstep(struct dsa_switch *ds);

void sja1105_tas_adjfreq(struct dsa_switch *ds);

bool sja1105_gating_check_conflicts(struct sja1105_private *priv, int port,
                                    struct netlink_ext_ack *extack);

int sja1105_init_scheduling(struct sja1105_private *priv);

#else

/* C doesn't allow empty structures, bah! */
struct sja1105_tas_data {
        u8 dummy;
};

static inline int sja1105_setup_tc_taprio(struct dsa_switch *ds, int port,
                                          struct tc_taprio_qopt_offload *admin)
{
        return -EOPNOTSUPP;
}

static inline void sja1105_tas_setup(struct dsa_switch *ds) { }

static inline void sja1105_tas_teardown(struct dsa_switch *ds) { }

static inline void sja1105_tas_clockstep(struct dsa_switch *ds) { }

static inline void sja1105_tas_adjfreq(struct dsa_switch *ds) { }

static inline bool
sja1105_gating_check_conflicts(struct dsa_switch *ds, int port,
                               struct netlink_ext_ack *extack)
{
        return true;
}

static inline int sja1105_init_scheduling(struct sja1105_private *priv)
{
        return 0;
}

#endif /* IS_ENABLED(CONFIG_NET_DSA_SJA1105_TAS) */

#endif /* _SJA1105_TAS_H */