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1// SPDX-License-Identifier: GPL-2.0+2/* Copyright (c) 2022 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>3 * Copyright (c) 2022 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>4 *5 */6 7#include <linux/can/dev.h>8#include <linux/ethtool.h>9#include <linux/kernel.h>10#include <linux/netdevice.h>11#include <linux/platform_device.h>12 13#include "flexcan.h"14 15static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = {16#define FLEXCAN_PRIV_FLAGS_RX_RTR BIT(0)17 "rx-rtr",18};19 20static void21flexcan_get_ringparam(struct net_device *ndev, struct ethtool_ringparam *ring,22 struct kernel_ethtool_ringparam *kernel_ring,23 struct netlink_ext_ack *ext_ack)24{25 const struct flexcan_priv *priv = netdev_priv(ndev);26 27 ring->rx_max_pending = priv->mb_count;28 ring->tx_max_pending = priv->mb_count;29 30 if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX)31 ring->rx_pending = priv->offload.mb_last -32 priv->offload.mb_first + 1;33 else34 ring->rx_pending = 6; /* RX-FIFO depth is fixed */35 36 /* the drive currently supports only on TX buffer */37 ring->tx_pending = 1;38}39 40static void41flexcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data)42{43 switch (stringset) {44 case ETH_SS_PRIV_FLAGS:45 memcpy(data, flexcan_priv_flags_strings,46 sizeof(flexcan_priv_flags_strings));47 }48}49 50static u32 flexcan_get_priv_flags(struct net_device *ndev)51{52 const struct flexcan_priv *priv = netdev_priv(ndev);53 u32 priv_flags = 0;54 55 if (flexcan_active_rx_rtr(priv))56 priv_flags |= FLEXCAN_PRIV_FLAGS_RX_RTR;57 58 return priv_flags;59}60 61static int flexcan_set_priv_flags(struct net_device *ndev, u32 priv_flags)62{63 struct flexcan_priv *priv = netdev_priv(ndev);64 u32 quirks = priv->devtype_data.quirks;65 66 if (priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) {67 if (flexcan_supports_rx_mailbox_rtr(priv))68 quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;69 else if (flexcan_supports_rx_fifo(priv))70 quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX;71 else72 quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;73 } else {74 if (flexcan_supports_rx_mailbox(priv))75 quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;76 else77 quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX;78 }79 80 if (quirks != priv->devtype_data.quirks && netif_running(ndev))81 return -EBUSY;82 83 priv->devtype_data.quirks = quirks;84 85 if (!(priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) &&86 !flexcan_active_rx_rtr(priv))87 netdev_info(ndev,88 "Activating RX mailbox mode, cannot receive RTR frames.\n");89 90 return 0;91}92 93static int flexcan_get_sset_count(struct net_device *netdev, int sset)94{95 switch (sset) {96 case ETH_SS_PRIV_FLAGS:97 return ARRAY_SIZE(flexcan_priv_flags_strings);98 default:99 return -EOPNOTSUPP;100 }101}102 103const struct ethtool_ops flexcan_ethtool_ops = {104 .get_ringparam = flexcan_get_ringparam,105 .get_strings = flexcan_get_strings,106 .get_priv_flags = flexcan_get_priv_flags,107 .set_priv_flags = flexcan_set_priv_flags,108 .get_sset_count = flexcan_get_sset_count,109 .get_ts_info = ethtool_op_get_ts_info,110};111