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