| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | // |
| 3 | // Copyright (c) 2023, 2024 Pengutronix, |
| 4 | // Marc Kleine-Budde <kernel@pengutronix.de> |
| 5 | // |
| 6 | |
| 7 | #include <linux/ethtool.h> |
| 8 | |
| 9 | #include "rockchip_canfd.h" |
| 10 | |
| 11 | enum rkcanfd_stats_type { |
| 12 | RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS, |
| 13 | RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS, |
| 14 | }; |
| 15 | |
| 16 | static const char rkcanfd_stats_strings[][ETH_GSTRING_LEN] = { |
| 17 | [RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS] = "rx_fifo_empty_errors", |
| 18 | [RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS] = "tx_extended_as_standard_errors", |
| 19 | }; |
| 20 | |
| 21 | static void |
| 22 | rkcanfd_ethtool_get_strings(struct net_device *ndev, u32 stringset, u8 *buf) |
| 23 | { |
| 24 | switch (stringset) { |
| 25 | case ETH_SS_STATS: |
| 26 | memcpy(buf, rkcanfd_stats_strings, |
| 27 | sizeof(rkcanfd_stats_strings)); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | static int rkcanfd_ethtool_get_sset_count(struct net_device *netdev, int sset) |
| 32 | { |
| 33 | switch (sset) { |
| 34 | case ETH_SS_STATS: |
| 35 | return ARRAY_SIZE(rkcanfd_stats_strings); |
| 36 | default: |
| 37 | return -EOPNOTSUPP; |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | static void |
| 42 | rkcanfd_ethtool_get_ethtool_stats(struct net_device *ndev, |
| 43 | struct ethtool_stats *stats, u64 *data) |
| 44 | { |
| 45 | struct rkcanfd_priv *priv = netdev_priv(dev: ndev); |
| 46 | struct rkcanfd_stats *rkcanfd_stats; |
| 47 | unsigned int start; |
| 48 | |
| 49 | rkcanfd_stats = &priv->stats; |
| 50 | |
| 51 | do { |
| 52 | start = u64_stats_fetch_begin(syncp: &rkcanfd_stats->syncp); |
| 53 | |
| 54 | data[RKCANFD_STATS_TYPE_RX_FIFO_EMPTY_ERRORS] = |
| 55 | u64_stats_read(p: &rkcanfd_stats->rx_fifo_empty_errors); |
| 56 | data[RKCANFD_STATS_TYPE_TX_EXTENDED_AS_STANDARD_ERRORS] = |
| 57 | u64_stats_read(p: &rkcanfd_stats->tx_extended_as_standard_errors); |
| 58 | } while (u64_stats_fetch_retry(syncp: &rkcanfd_stats->syncp, start)); |
| 59 | } |
| 60 | |
| 61 | static const struct ethtool_ops rkcanfd_ethtool_ops = { |
| 62 | .get_ts_info = can_ethtool_op_get_ts_info_hwts, |
| 63 | .get_strings = rkcanfd_ethtool_get_strings, |
| 64 | .get_sset_count = rkcanfd_ethtool_get_sset_count, |
| 65 | .get_ethtool_stats = rkcanfd_ethtool_get_ethtool_stats, |
| 66 | }; |
| 67 | |
| 68 | void rkcanfd_ethtool_init(struct rkcanfd_priv *priv) |
| 69 | { |
| 70 | priv->ndev->ethtool_ops = &rkcanfd_ethtool_ops; |
| 71 | |
| 72 | u64_stats_init(syncp: &priv->stats.syncp); |
| 73 | } |
| 74 |