/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */

#ifndef NFP_NET_REPR_H
#define NFP_NET_REPR_H

struct metadata_dst;
struct nfp_app;
struct nfp_net;
struct nfp_port;

#include <net/dst_metadata.h>

/**
 * struct nfp_reprs - container for representor netdevs
 * @num_reprs:  Number of elements in reprs array
 * @reprs:      Array of representor netdevs
 */
struct nfp_reprs {
        unsigned int num_reprs;
        struct net_device __rcu *reprs[] __counted_by(num_reprs);
};

/**
 * struct nfp_repr_pcpu_stats
 * @rx_packets: Received packets
 * @rx_bytes:   Received bytes
 * @tx_packets: Transmitted packets
 * @tx_bytes:   Transmitted dropped
 * @tx_drops:   Packets dropped on transmit
 * @syncp:      Reference count
 */
struct nfp_repr_pcpu_stats {
        u64 rx_packets;
        u64 rx_bytes;
        u64 tx_packets;
        u64 tx_bytes;
        u64 tx_drops;
        struct u64_stats_sync syncp;
};

/**
 * struct nfp_repr - priv data for representor netdevs
 * @netdev:     Back pointer to netdev
 * @dst:        Destination for packet TX
 * @port:       Port of representor
 * @app:        APP handle
 * @stats:      Statistic of packets hitting CPU
 * @app_priv:   Pointer for APP data
 */
struct nfp_repr {
        struct net_device *netdev;
        struct metadata_dst *dst;
        struct nfp_port *port;
        struct nfp_app *app;
        struct nfp_repr_pcpu_stats __percpu *stats;
        void *app_priv;
};

/**
 * enum nfp_repr_type - type of representor
 * @NFP_REPR_TYPE_PHYS_PORT:    external NIC port
 * @NFP_REPR_TYPE_PF:           physical function
 * @NFP_REPR_TYPE_VF:           virtual function
 * @__NFP_REPR_TYPE_MAX:        number of representor types
 */
enum nfp_repr_type {
        NFP_REPR_TYPE_PHYS_PORT,
        NFP_REPR_TYPE_PF,
        NFP_REPR_TYPE_VF,

        __NFP_REPR_TYPE_MAX,
};
#define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)

extern const struct net_device_ops nfp_repr_netdev_ops;

static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
{
        return netdev->netdev_ops == &nfp_repr_netdev_ops;
}

static inline int nfp_repr_get_port_id(struct net_device *netdev)
{
        struct nfp_repr *priv = netdev_priv(netdev);

        return priv->dst->u.port_info.port_id;
}

struct net_device *
nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set,
                    unsigned int id);

void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
void
nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower);
int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
                  u32 cmsg_port_id, struct nfp_port *port,
                  struct net_device *pf_netdev);
void nfp_repr_free(struct net_device *netdev);
struct net_device *
nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs);
void nfp_repr_clean_and_free(struct nfp_repr *repr);
void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs);
void nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
                                      enum nfp_repr_type type);
struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
int nfp_reprs_resync_phys_ports(struct nfp_app *app);

static inline struct net_device *nfp_repr_alloc(struct nfp_app *app)
{
        return nfp_repr_alloc_mqs(app, 1, 1);
}
#endif /* NFP_NET_REPR_H */