1 // SPDX-License-Identifier: GPL-2.0+
2 /* Copyright (c) 2022 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>
3  *
4  */
5 
6 #include <linux/can/dev.h>
7 #include <linux/ethtool.h>
8 #include <linux/kernel.h>
9 #include <linux/netdevice.h>
10 #include <linux/platform_device.h>
11 
12 #include "slcan.h"
13 
14 static const char slcan_priv_flags_strings[][ETH_GSTRING_LEN] = {
15 #define SLCAN_PRIV_FLAGS_ERR_RST_ON_OPEN BIT(0)
16 	"err-rst-on-open",
17 };
18 
19 static void slcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
20 {
21 	switch (stringset) {
22 	case ETH_SS_PRIV_FLAGS:
23 		memcpy(data, slcan_priv_flags_strings,
24 		       sizeof(slcan_priv_flags_strings));
25 	}
26 }
27 
28 static u32 slcan_get_priv_flags(struct net_device *ndev)
29 {
30 	u32 flags = 0;
31 
32 	if (slcan_err_rst_on_open(ndev))
33 		flags |= SLCAN_PRIV_FLAGS_ERR_RST_ON_OPEN;
34 
35 	return flags;
36 }
37 
38 static int slcan_set_priv_flags(struct net_device *ndev, u32 flags)
39 {
40 	bool err_rst_op_open = !!(flags & SLCAN_PRIV_FLAGS_ERR_RST_ON_OPEN);
41 
42 	return slcan_enable_err_rst_on_open(ndev, err_rst_op_open);
43 }
44 
45 static int slcan_get_sset_count(struct net_device *netdev, int sset)
46 {
47 	switch (sset) {
48 	case ETH_SS_PRIV_FLAGS:
49 		return ARRAY_SIZE(slcan_priv_flags_strings);
50 	default:
51 		return -EOPNOTSUPP;
52 	}
53 }
54 
55 const struct ethtool_ops slcan_ethtool_ops = {
56 	.get_strings = slcan_get_strings,
57 	.get_priv_flags = slcan_get_priv_flags,
58 	.set_priv_flags = slcan_set_priv_flags,
59 	.get_sset_count = slcan_get_sset_count,
60 	.get_ts_info = ethtool_op_get_ts_info,
61 };
62