111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/* Copyright (c) 2022 Amarula Solutions, Dario Binacchi <dario.binacchi@amarulasolutions.com>
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* Copyright (c) 2022 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>
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*
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*/
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#include <linux/can/dev.h>
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#include <linux/ethtool.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/platform_device.h>
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#include "flexcan.h"
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static const char flexcan_priv_flags_strings[][ETH_GSTRING_LEN] = {
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#define FLEXCAN_PRIV_FLAGS_RX_RTR BIT(0)
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"rx-rtr",
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};
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static void
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flexcan_get_ringparam(struct net_device *ndev, struct ethtool_ringparam *ring,
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struct kernel_ethtool_ringparam *kernel_ring,
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struct netlink_ext_ack *ext_ack)
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{
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const struct flexcan_priv *priv = netdev_priv(ndev);
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ring->rx_max_pending = priv->mb_count;
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ring->tx_max_pending = priv->mb_count;
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if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_RX_MAILBOX)
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ring->rx_pending = priv->offload.mb_last -
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priv->offload.mb_first + 1;
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else
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ring->rx_pending = 6; /* RX-FIFO depth is fixed */
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/* the drive currently supports only on TX buffer */
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ring->tx_pending = 1;
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}
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static void
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flexcan_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
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{
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switch (stringset) {
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case ETH_SS_PRIV_FLAGS:
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memcpy(data, flexcan_priv_flags_strings,
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sizeof(flexcan_priv_flags_strings));
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}
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}
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static u32 flexcan_get_priv_flags(struct net_device *ndev)
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{
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const struct flexcan_priv *priv = netdev_priv(ndev);
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u32 priv_flags = 0;
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if (flexcan_active_rx_rtr(priv))
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priv_flags |= FLEXCAN_PRIV_FLAGS_RX_RTR;
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return priv_flags;
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}
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static int flexcan_set_priv_flags(struct net_device *ndev, u32 priv_flags)
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{
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struct flexcan_priv *priv = netdev_priv(ndev);
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u32 quirks = priv->devtype_data.quirks;
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if (priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) {
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if (flexcan_supports_rx_mailbox_rtr(priv))
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quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;
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else if (flexcan_supports_rx_fifo(priv))
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quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX;
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else
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quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;
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} else {
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if (flexcan_supports_rx_mailbox(priv))
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quirks |= FLEXCAN_QUIRK_USE_RX_MAILBOX;
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else
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quirks &= ~FLEXCAN_QUIRK_USE_RX_MAILBOX;
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}
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if (quirks != priv->devtype_data.quirks && netif_running(ndev))
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return -EBUSY;
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priv->devtype_data.quirks = quirks;
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if (!(priv_flags & FLEXCAN_PRIV_FLAGS_RX_RTR) &&
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!flexcan_active_rx_rtr(priv))
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netdev_info(ndev,
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"Activating RX mailbox mode, cannot receive RTR frames.\n");
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return 0;
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}
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static int flexcan_get_sset_count(struct net_device *netdev, int sset)
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{
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switch (sset) {
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case ETH_SS_PRIV_FLAGS:
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return ARRAY_SIZE(flexcan_priv_flags_strings);
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default:
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return -EOPNOTSUPP;
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}
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}
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const struct ethtool_ops flexcan_ethtool_ops = {
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.get_ringparam = flexcan_get_ringparam,
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.get_strings = flexcan_get_strings,
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.get_priv_flags = flexcan_get_priv_flags,
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.set_priv_flags = flexcan_set_priv_flags,
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.get_sset_count = flexcan_get_sset_count,
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.get_ts_info = ethtool_op_get_ts_info,
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};
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