/* SPDX-License-Identifier: GPL-2.0
 *
 * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
 *
 * Copyright (c) 2021, 2022 Pengutronix,
 *               Marc Kleine-Budde <kernel@pengutronix.de>
 */

#ifndef _MCP251XFD_RAM_H
#define _MCP251XFD_RAM_H

#include <linux/ethtool.h>

#define CAN_RAM_NUM_MAX (-1)

enum can_ram_mode {
        CAN_RAM_MODE_CAN,
        CAN_RAM_MODE_CANFD,
        __CAN_RAM_MODE_MAX
};

struct can_ram_obj_config {
        u8 size[__CAN_RAM_MODE_MAX];

        u8 def[__CAN_RAM_MODE_MAX];
        u8 min;
        u8 max;

        u8 fifo_num;
        u8 fifo_depth_min;
        u8 fifo_depth_coalesce_min;
};

struct can_ram_config {
        const struct can_ram_obj_config rx;
        const struct can_ram_obj_config tx;

        u16 size;
        u8 fifo_depth;
};

struct can_ram_layout {
        u8 default_rx;
        u8 default_tx;

        u8 max_rx;
        u8 max_tx;

        u8 cur_rx;
        u8 cur_tx;

        u8 rx_coalesce;
        u8 tx_coalesce;
};

void can_ram_get_layout(struct can_ram_layout *layout,
                        const struct can_ram_config *config,
                        const struct ethtool_ringparam *ring,
                        const struct ethtool_coalesce *ec,
                        const bool fd_mode);

#endif