forked from mirrors/linux
2bcf4772e4
Protect all ethtool callbacks and PHY related state with the netdev instance lock, for drivers which want / need to have their ops instance-locked. Basically take the lock everywhere we take rtnl_lock. It was tempting to take the lock in ethnl_ops_begin(), but turns out we actually nest those calls (when generating notifications). Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Cc: Saeed Mahameed <saeed@kernel.org> Signed-off-by: Stanislav Fomichev <sdf@fomichev.me> Link: https://patch.msgid.link/20250305163732.2766420-11-sdf@fomichev.me Signed-off-by: Jakub Kicinski <kuba@kernel.org>
229 lines
6.4 KiB
C
229 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Facebook
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#include <linux/debugfs.h>
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#include <linux/random.h>
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#include <net/netdev_queues.h>
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#include "netdevsim.h"
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static void
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nsim_get_pause_stats(struct net_device *dev,
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struct ethtool_pause_stats *pause_stats)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (ns->ethtool.pauseparam.report_stats_rx)
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pause_stats->rx_pause_frames = 1;
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if (ns->ethtool.pauseparam.report_stats_tx)
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pause_stats->tx_pause_frames = 2;
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}
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static void
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nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
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{
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struct netdevsim *ns = netdev_priv(dev);
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pause->autoneg = 0; /* We don't support ksettings, so can't pretend */
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pause->rx_pause = ns->ethtool.pauseparam.rx;
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pause->tx_pause = ns->ethtool.pauseparam.tx;
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}
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static int
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nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (pause->autoneg)
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return -EINVAL;
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ns->ethtool.pauseparam.rx = pause->rx_pause;
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ns->ethtool.pauseparam.tx = pause->tx_pause;
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return 0;
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}
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static int nsim_get_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal,
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struct kernel_ethtool_coalesce *kernel_coal,
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struct netlink_ext_ack *extack)
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{
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struct netdevsim *ns = netdev_priv(dev);
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memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce));
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return 0;
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}
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static int nsim_set_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal,
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struct kernel_ethtool_coalesce *kernel_coal,
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struct netlink_ext_ack *extack)
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{
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struct netdevsim *ns = netdev_priv(dev);
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memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce));
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return 0;
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}
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static void nsim_get_ringparam(struct net_device *dev,
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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 netdevsim *ns = netdev_priv(dev);
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memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring));
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kernel_ring->hds_thresh_max = NSIM_HDS_THRESHOLD_MAX;
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if (dev->cfg->hds_config == ETHTOOL_TCP_DATA_SPLIT_UNKNOWN)
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kernel_ring->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED;
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}
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static int nsim_set_ringparam(struct net_device *dev,
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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 netdevsim *ns = netdev_priv(dev);
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ns->ethtool.ring.rx_pending = ring->rx_pending;
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ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending;
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ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending;
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ns->ethtool.ring.tx_pending = ring->tx_pending;
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return 0;
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}
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static void
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nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch)
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{
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struct netdevsim *ns = netdev_priv(dev);
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ch->max_combined = ns->nsim_bus_dev->num_queues;
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ch->combined_count = ns->ethtool.channels;
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}
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static int
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nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch)
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{
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struct netdevsim *ns = netdev_priv(dev);
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int err;
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err = netif_set_real_num_queues(dev, ch->combined_count,
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ch->combined_count);
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if (err)
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return err;
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ns->ethtool.channels = ch->combined_count;
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return 0;
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}
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static int
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nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
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{
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struct netdevsim *ns = netdev_priv(dev);
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if (ns->ethtool.get_err)
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return -ns->ethtool.get_err;
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memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));
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return 0;
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}
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static int
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nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
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{
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struct netdevsim *ns = netdev_priv(dev);
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u32 fec;
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if (ns->ethtool.set_err)
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return -ns->ethtool.set_err;
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memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));
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fec = fecparam->fec;
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if (fec == ETHTOOL_FEC_AUTO)
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fec |= ETHTOOL_FEC_OFF;
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fec |= ETHTOOL_FEC_NONE;
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ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);
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return 0;
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}
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static void
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nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats)
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{
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fec_stats->corrected_blocks.total = 123;
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fec_stats->uncorrectable_blocks.total = 4;
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}
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static int nsim_get_ts_info(struct net_device *dev,
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struct kernel_ethtool_ts_info *info)
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{
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struct netdevsim *ns = netdev_priv(dev);
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info->phc_index = mock_phc_index(ns->phc);
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return 0;
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}
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static const struct ethtool_ops nsim_ethtool_ops = {
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.supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS,
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.supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT |
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ETHTOOL_RING_USE_HDS_THRS,
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.get_pause_stats = nsim_get_pause_stats,
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.get_pauseparam = nsim_get_pauseparam,
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.set_pauseparam = nsim_set_pauseparam,
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.set_coalesce = nsim_set_coalesce,
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.get_coalesce = nsim_get_coalesce,
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.get_ringparam = nsim_get_ringparam,
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.set_ringparam = nsim_set_ringparam,
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.get_channels = nsim_get_channels,
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.set_channels = nsim_set_channels,
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.get_fecparam = nsim_get_fecparam,
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.set_fecparam = nsim_set_fecparam,
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.get_fec_stats = nsim_get_fec_stats,
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.get_ts_info = nsim_get_ts_info,
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};
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static void nsim_ethtool_ring_init(struct netdevsim *ns)
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{
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ns->ethtool.ring.rx_pending = 512;
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ns->ethtool.ring.rx_max_pending = 4096;
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ns->ethtool.ring.rx_jumbo_max_pending = 4096;
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ns->ethtool.ring.rx_mini_max_pending = 4096;
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ns->ethtool.ring.tx_pending = 512;
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ns->ethtool.ring.tx_max_pending = 4096;
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}
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void nsim_ethtool_init(struct netdevsim *ns)
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{
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struct dentry *ethtool, *dir;
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ns->netdev->ethtool_ops = &nsim_ethtool_ops;
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nsim_ethtool_ring_init(ns);
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ns->ethtool.pauseparam.report_stats_rx = true;
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ns->ethtool.pauseparam.report_stats_tx = true;
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ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
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ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
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ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
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ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
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debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);
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debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);
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dir = debugfs_create_dir("pause", ethtool);
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debugfs_create_bool("report_stats_rx", 0600, dir,
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&ns->ethtool.pauseparam.report_stats_rx);
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debugfs_create_bool("report_stats_tx", 0600, dir,
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&ns->ethtool.pauseparam.report_stats_tx);
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dir = debugfs_create_dir("ring", ethtool);
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debugfs_create_u32("rx_max_pending", 0600, dir,
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&ns->ethtool.ring.rx_max_pending);
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debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
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&ns->ethtool.ring.rx_jumbo_max_pending);
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debugfs_create_u32("rx_mini_max_pending", 0600, dir,
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&ns->ethtool.ring.rx_mini_max_pending);
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debugfs_create_u32("tx_max_pending", 0600, dir,
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&ns->ethtool.ring.tx_max_pending);
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}
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