/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * linux/can/rx-offload.h
 *
 * Copyright (c) 2014 David Jander, Protonic Holland
 * Copyright (c) 2014-2017, 2023 Pengutronix, Marc Kleine-Budde <[email protected]>
 */

#ifndef _CAN_RX_OFFLOAD_H
#define _CAN_RX_OFFLOAD_H

#include <linux/netdevice.h>
#include <linux/can.h>

struct can_rx_offload {
    struct net_device *dev;

    struct sk_buff *(*mailbox_read)(struct can_rx_offload *offload,
                    unsigned int mb, u32 *timestamp,
                    bool drop);

    struct sk_buff_head skb_queue;
    struct sk_buff_head skb_irq_queue;
    u32 skb_queue_len_max;

    unsigned int mb_first;
    unsigned int mb_last;

    struct napi_struct napi;

    bool inc;
};

int can_rx_offload_add_timestamp(struct net_device *dev,
                 struct can_rx_offload *offload);
int can_rx_offload_add_fifo(struct net_device *dev,
                struct can_rx_offload *offload,
                unsigned int weight);
int can_rx_offload_add_manual(struct net_device *dev,
                  struct can_rx_offload *offload,
                  unsigned int weight);
int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
                     u64 reg);
int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload);
int can_rx_offload_queue_timestamp(struct can_rx_offload *offload,
                   struct sk_buff *skb, u32 timestamp);
unsigned int can_rx_offload_get_echo_skb_queue_timestamp(struct can_rx_offload *offload,
                             unsigned int idx, u32 timestamp,
                             unsigned int *frame_len_ptr);
int can_rx_offload_queue_tail(struct can_rx_offload *offload,
                  struct sk_buff *skb);
unsigned int can_rx_offload_get_echo_skb_queue_tail(struct can_rx_offload *offload,
                            unsigned int idx,
                            unsigned int *frame_len_ptr);
void can_rx_offload_irq_finish(struct can_rx_offload *offload);
void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload);
void can_rx_offload_del(struct can_rx_offload *offload);
void can_rx_offload_enable(struct can_rx_offload *offload);

static inline void can_rx_offload_disable(struct can_rx_offload *offload)
{
    napi_disable(&offload->napi);
}

#endif /* !_CAN_RX_OFFLOAD_H */