diff options
Diffstat (limited to 'drivers/net/netdevsim/ethtool.c')
| -rw-r--r-- | drivers/net/netdevsim/ethtool.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/net/netdevsim/ethtool.c b/drivers/net/netdevsim/ethtool.c new file mode 100644 index 000000000..ffd9f84b6 --- /dev/null +++ b/drivers/net/netdevsim/ethtool.c @@ -0,0 +1,199 @@ +// 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); +} |