drivers/net/can/slcan/slcan-ethtool.c

   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 };