/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */

#ifndef _FUNETH_H
#define _FUNETH_H

#include <uapi/linux/if_ether.h>
#include <linux/net_tstamp.h>
#include <linux/mutex.h>
#include <linux/seqlock.h>
#include <linux/xarray.h>
#include <net/devlink.h>
#include "fun_dev.h"

#define ADMIN_SQE_SIZE SZ_128
#define ADMIN_CQE_SIZE SZ_64
#define ADMIN_RSP_MAX_LEN (ADMIN_CQE_SIZE - sizeof(struct fun_cqe_info))

#define FUN_MAX_MTU 9024

#define SQ_DEPTH 512U
#define CQ_DEPTH 1024U
#define RQ_DEPTH (512U / (PAGE_SIZE / 4096))

#define CQ_INTCOAL_USEC 10
#define CQ_INTCOAL_NPKT 16
#define SQ_INTCOAL_USEC 10
#define SQ_INTCOAL_NPKT 16

#define INVALID_LPORT 0xffff

#define FUN_PORT_CAP_PAUSE_MASK (FUN_PORT_CAP_TX_PAUSE | FUN_PORT_CAP_RX_PAUSE)

struct fun_vport_info {
        u8 mac[ETH_ALEN];
        u16 vlan;
        __be16 vlan_proto;
        u8 qos;
        u8 spoofchk:1;
        u8 trusted:1;
        unsigned int max_rate;
};

/* "subclass" of fun_dev for Ethernet functions */
struct fun_ethdev {
        struct fun_dev fdev;

        /* the function's network ports */
        struct net_device **netdevs;
        unsigned int num_ports;

        /* configuration for the function's virtual ports */
        unsigned int num_vports;
        struct fun_vport_info *vport_info;

        struct mutex state_mutex; /* nests inside RTNL if both taken */

        unsigned int nsqs_per_port;
};

static inline struct fun_ethdev *to_fun_ethdev(struct fun_dev *p)
{
        return container_of(p, struct fun_ethdev, fdev);
}

struct fun_qset {
        struct funeth_rxq **rxqs;
        struct funeth_txq **txqs;
        struct funeth_txq **xdpqs;
        unsigned int nrxqs;
        unsigned int ntxqs;
        unsigned int nxdpqs;
        unsigned int rxq_start;
        unsigned int txq_start;
        unsigned int xdpq_start;
        unsigned int cq_depth;
        unsigned int rq_depth;
        unsigned int sq_depth;
        int state;
};

/* Per netdevice driver state, i.e., netdev_priv. */
struct funeth_priv {
        struct fun_dev *fdev;
        struct pci_dev *pdev;
        struct net_device *netdev;

        struct funeth_rxq * __rcu *rxqs;
        struct funeth_txq **txqs;
        struct funeth_txq * __rcu *xdpqs;

        struct xarray irqs;
        unsigned int num_tx_irqs;
        unsigned int num_rx_irqs;
        unsigned int rx_irq_ofst;

        unsigned int lane_attrs;
        u16 lport;

        /* link settings */
        u64 port_caps;
        u64 advertising;
        u64 lp_advertising;
        unsigned int link_speed;
        u8 xcvr_type;
        u8 active_fc;
        u8 active_fec;
        u8 link_down_reason;
        seqcount_t link_seq;

        u32 msg_enable;

        unsigned int num_xdpqs;

        /* ethtool, etc. config parameters */
        unsigned int sq_depth;
        unsigned int rq_depth;
        unsigned int cq_depth;
        unsigned int cq_irq_db;
        u8 tx_coal_usec;
        u8 tx_coal_count;
        u8 rx_coal_usec;
        u8 rx_coal_count;

        struct kernel_hwtstamp_config hwtstamp_cfg;

        /* cumulative queue stats from earlier queue instances */
        u64 tx_packets;
        u64 tx_bytes;
        u64 tx_dropped;
        u64 rx_packets;
        u64 rx_bytes;
        u64 rx_dropped;

        /* RSS */
        unsigned int rss_hw_id;
        enum fun_eth_hash_alg hash_algo;
        u8 rss_key[FUN_ETH_RSS_MAX_KEY_SIZE];
        unsigned int indir_table_nentries;
        u32 indir_table[FUN_ETH_RSS_MAX_INDIR_ENT];
        dma_addr_t rss_dma_addr;
        void *rss_cfg;

        /* DMA area for port stats */
        dma_addr_t stats_dma_addr;
        __be64 *stats;

        struct bpf_prog *xdp_prog;

        struct devlink_port dl_port;

        /* kTLS state */
        unsigned int ktls_id;
        atomic64_t tx_tls_add;
        atomic64_t tx_tls_del;
        atomic64_t tx_tls_resync;
};

void fun_set_ethtool_ops(struct net_device *netdev);
int fun_port_write_cmd(struct funeth_priv *fp, int key, u64 data);
int fun_port_read_cmd(struct funeth_priv *fp, int key, u64 *data);
int fun_create_and_bind_tx(struct funeth_priv *fp, u32 sqid);
int fun_replace_queues(struct net_device *dev, struct fun_qset *newqs,
                       struct netlink_ext_ack *extack);
int fun_change_num_queues(struct net_device *dev, unsigned int ntx,
                          unsigned int nrx);
void fun_set_ring_count(struct net_device *netdev, unsigned int ntx,
                        unsigned int nrx);
int fun_config_rss(struct net_device *dev, int algo, const u8 *key,
                   const u32 *qtable, u8 op);

#endif /* _FUNETH_H */