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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <linux/debugfs.h>
#include <linux/ethtool.h>
#include <linux/random.h>
#include "netdevsim.h"
static void
nsim_get_pause_stats(struct net_device *dev,
struct ethtool_pause_stats *pause_stats)
{
struct netdevsim *ns = netdev_priv(dev);
if (ns->ethtool.pauseparam.report_stats_rx)
pause_stats->rx_pause_frames = 1;
if (ns->ethtool.pauseparam.report_stats_tx)
pause_stats->tx_pause_frames = 2;
}
static void
nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
{
struct netdevsim *ns = netdev_priv(dev);
pause->autoneg = 0; /* We don't support ksettings, so can't pretend */
pause->rx_pause = ns->ethtool.pauseparam.rx;
pause->tx_pause = ns->ethtool.pauseparam.tx;
}
static int
nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
{
struct netdevsim *ns = netdev_priv(dev);
if (pause->autoneg)
return -EINVAL;
ns->ethtool.pauseparam.rx = pause->rx_pause;
ns->ethtool.pauseparam.tx = pause->tx_pause;
return 0;
}
static int nsim_get_coalesce(struct net_device *dev,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));
return 0;
}
static int nsim_set_coalesce(struct net_device *dev,
struct ethtool_coalesce *coal,
struct kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));
return 0;
}
static void nsim_get_ringparam(struct net_device *dev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct netdevsim *ns = netdev_priv(dev);
memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
}
static int nsim_set_ringparam(struct net_device *dev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct netdevsim *ns = netdev_priv(dev);
ns->ethtool.ring.rx_pending = ring->rx_pending;
ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending;
ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending;
ns->ethtool.ring.tx_pending = ring->tx_pending;
return 0;
}
static void
nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
{
struct netdevsim *ns = netdev_priv(dev);
ch->max_combined = ns->nsim_bus_dev->num_queues;
ch->combined_count = ns->ethtool.channels;
}
static int
nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
{
struct netdevsim *ns = netdev_priv(dev);
int err;
err = netif_set_real_num_queues(dev, ch->combined_count,
ch->combined_count);
if (err)
return err;
ns->ethtool.channels = ch->combined_count;
return 0;
}
static int
nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
{
struct netdevsim *ns = netdev_priv(dev);
if (ns->ethtool.get_err)
return -ns->ethtool.get_err;
memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));
return 0;
}
static int
nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
{
struct netdevsim *ns = netdev_priv(dev);
u32 fec;
if (ns->ethtool.set_err)
return -ns->ethtool.set_err;
memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));
fec = fecparam->fec;
if (fec == ETHTOOL_FEC_AUTO)
fec |= ETHTOOL_FEC_OFF;
fec |= ETHTOOL_FEC_NONE;
ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);
return 0;
}
static const struct ethtool_ops nsim_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
.get_pause_stats = nsim_get_pause_stats,
.get_pauseparam = nsim_get_pauseparam,
.set_pauseparam = nsim_set_pauseparam,
.set_coalesce = nsim_set_coalesce,
.get_coalesce = nsim_get_coalesce,
.get_ringparam = nsim_get_ringparam,
.set_ringparam = nsim_set_ringparam,
.get_channels = nsim_get_channels,
.set_channels = nsim_set_channels,
.get_fecparam = nsim_get_fecparam,
.set_fecparam = nsim_set_fecparam,
};
static void nsim_ethtool_ring_init(struct netdevsim *ns)
{
ns->ethtool.ring.rx_max_pending = 4096;
ns->ethtool.ring.rx_jumbo_max_pending = 4096;
ns->ethtool.ring.rx_mini_max_pending = 4096;
ns->ethtool.ring.tx_max_pending = 4096;
}
void nsim_ethtool_init(struct netdevsim *ns)
{
struct dentry *ethtool, *dir;
ns->netdev->ethtool_ops = &nsim_ethtool_ops;
nsim_ethtool_ring_init(ns);
ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);
debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);
dir = debugfs_create_dir("pause", ethtool);
debugfs_create_bool("report_stats_rx", 0600, dir,
&ns->ethtool.pauseparam.report_stats_rx);
debugfs_create_bool("report_stats_tx", 0600, dir,
&ns->ethtool.pauseparam.report_stats_tx);
dir = debugfs_create_dir("ring", ethtool);
debugfs_create_u32("rx_max_pending", 0600, dir,
&ns->ethtool.ring.rx_max_pending);
debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
&ns->ethtool.ring.rx_jumbo_max_pending);
debugfs_create_u32("rx_mini_max_pending", 0600, dir,
&ns->ethtool.ring.rx_mini_max_pending);
debugfs_create_u32("tx_max_pending", 0600, dir,
&ns->ethtool.ring.tx_max_pending);
}
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