1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * mcp251xfd - Microchip MCP251xFD Family CAN controller driver
4 *
5 * Copyright (c) 2021, 2022 Pengutronix,
6 *               Marc Kleine-Budde <kernel@pengutronix.de>
7 */
8
9#ifndef _MCP251XFD_RAM_H
10#define _MCP251XFD_RAM_H
11
12#include <linux/ethtool.h>
13
14#define CAN_RAM_NUM_MAX (-1)
15
16enum can_ram_mode {
17	CAN_RAM_MODE_CAN,
18	CAN_RAM_MODE_CANFD,
19	__CAN_RAM_MODE_MAX
20};
21
22struct can_ram_obj_config {
23	u8 size[__CAN_RAM_MODE_MAX];
24
25	u8 def[__CAN_RAM_MODE_MAX];
26	u8 min;
27	u8 max;
28
29	u8 fifo_num;
30	u8 fifo_depth_min;
31	u8 fifo_depth_coalesce_min;
32};
33
34struct can_ram_config {
35	const struct can_ram_obj_config rx;
36	const struct can_ram_obj_config tx;
37
38	u16 size;
39	u8 fifo_depth;
40};
41
42struct can_ram_layout {
43	u8 default_rx;
44	u8 default_tx;
45
46	u8 max_rx;
47	u8 max_tx;
48
49	u8 cur_rx;
50	u8 cur_tx;
51
52	u8 rx_coalesce;
53	u8 tx_coalesce;
54};
55
56void can_ram_get_layout(struct can_ram_layout *layout,
57			const struct can_ram_config *config,
58			const struct ethtool_ringparam *ring,
59			const struct ethtool_coalesce *ec,
60			const bool fd_mode);
61
62#endif
63