146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// mcp251xfd - Microchip MCP251xFD Family CAN controller driver
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//
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// Copyright (c) 2021, 2022 Pengutronix,
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// Marc Kleine-Budde <kernel@pengutronix.de>
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//
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#include <linux/ethtool.h>
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#include "mcp251xfd.h"
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#include "mcp251xfd-ram.h"
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static void
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mcp251xfd_ring_get_ringparam(struct net_device *ndev,
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struct ethtool_ringparam *ring,
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struct kernel_ethtool_ringparam *kernel_ring,
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struct netlink_ext_ack *extack)
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{
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const struct mcp251xfd_priv *priv = netdev_priv(ndev);
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const bool fd_mode = mcp251xfd_is_fd_mode(priv);
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struct can_ram_layout layout;
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can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, fd_mode);
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ring->rx_max_pending = layout.max_rx;
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ring->tx_max_pending = layout.max_tx;
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ring->rx_pending = priv->rx_obj_num;
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ring->tx_pending = priv->tx->obj_num;
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}
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static int
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mcp251xfd_ring_set_ringparam(struct net_device *ndev,
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struct ethtool_ringparam *ring,
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struct kernel_ethtool_ringparam *kernel_ring,
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struct netlink_ext_ack *extack)
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{
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struct mcp251xfd_priv *priv = netdev_priv(ndev);
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const bool fd_mode = mcp251xfd_is_fd_mode(priv);
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struct can_ram_layout layout;
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can_ram_get_layout(&layout, &mcp251xfd_ram_config, ring, NULL, fd_mode);
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if ((layout.cur_rx != priv->rx_obj_num ||
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layout.cur_tx != priv->tx->obj_num) &&
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netif_running(ndev))
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return -EBUSY;
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priv->rx_obj_num = layout.cur_rx;
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priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
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priv->tx->obj_num = layout.cur_tx;
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priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
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return 0;
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}
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static int mcp251xfd_ring_get_coalesce(struct net_device *ndev,
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struct ethtool_coalesce *ec,
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struct kernel_ethtool_coalesce *kec,
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struct netlink_ext_ack *ext_ack)
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{
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struct mcp251xfd_priv *priv = netdev_priv(ndev);
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u32 rx_max_frames, tx_max_frames;
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/* The ethtool doc says:
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* To disable coalescing, set usecs = 0 and max_frames = 1.
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*/
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if (priv->rx_obj_num_coalesce_irq == 0)
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rx_max_frames = 1;
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else
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rx_max_frames = priv->rx_obj_num_coalesce_irq;
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ec->rx_max_coalesced_frames_irq = rx_max_frames;
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ec->rx_coalesce_usecs_irq = priv->rx_coalesce_usecs_irq;
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if (priv->tx_obj_num_coalesce_irq == 0)
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tx_max_frames = 1;
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else
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tx_max_frames = priv->tx_obj_num_coalesce_irq;
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ec->tx_max_coalesced_frames_irq = tx_max_frames;
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ec->tx_coalesce_usecs_irq = priv->tx_coalesce_usecs_irq;
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return 0;
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}
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static int mcp251xfd_ring_set_coalesce(struct net_device *ndev,
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struct ethtool_coalesce *ec,
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struct kernel_ethtool_coalesce *kec,
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struct netlink_ext_ack *ext_ack)
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{
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struct mcp251xfd_priv *priv = netdev_priv(ndev);
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const bool fd_mode = mcp251xfd_is_fd_mode(priv);
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const struct ethtool_ringparam ring = {
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.rx_pending = priv->rx_obj_num,
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.tx_pending = priv->tx->obj_num,
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};
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struct can_ram_layout layout;
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can_ram_get_layout(&layout, &mcp251xfd_ram_config, &ring, ec, fd_mode);
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if ((layout.rx_coalesce != priv->rx_obj_num_coalesce_irq ||
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ec->rx_coalesce_usecs_irq != priv->rx_coalesce_usecs_irq ||
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layout.tx_coalesce != priv->tx_obj_num_coalesce_irq ||
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ec->tx_coalesce_usecs_irq != priv->tx_coalesce_usecs_irq) &&
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netif_running(ndev))
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return -EBUSY;
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priv->rx_obj_num = layout.cur_rx;
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priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
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priv->rx_coalesce_usecs_irq = ec->rx_coalesce_usecs_irq;
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priv->tx->obj_num = layout.cur_tx;
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priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
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priv->tx_coalesce_usecs_irq = ec->tx_coalesce_usecs_irq;
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return 0;
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}
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static const struct ethtool_ops mcp251xfd_ethtool_ops = {
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.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS_IRQ |
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ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ |
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ETHTOOL_COALESCE_TX_USECS_IRQ |
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ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ,
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.get_ringparam = mcp251xfd_ring_get_ringparam,
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.set_ringparam = mcp251xfd_ring_set_ringparam,
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.get_coalesce = mcp251xfd_ring_get_coalesce,
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.set_coalesce = mcp251xfd_ring_set_coalesce,
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.get_ts_info = can_ethtool_op_get_ts_info_hwts,
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};
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void mcp251xfd_ethtool_init(struct mcp251xfd_priv *priv)
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{
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struct can_ram_layout layout;
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priv->ndev->ethtool_ops = &mcp251xfd_ethtool_ops;
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can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, false);
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priv->rx_obj_num = layout.default_rx;
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priv->tx->obj_num = layout.default_tx;
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priv->rx_obj_num_coalesce_irq = 0;
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priv->tx_obj_num_coalesce_irq = 0;
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priv->rx_coalesce_usecs_irq = 0;
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priv->tx_coalesce_usecs_irq = 0;
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}
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