ethtool.c (5682B)
1// SPDX-License-Identifier: GPL-2.0 2// Copyright (c) 2020 Facebook 3 4#include <linux/debugfs.h> 5#include <linux/ethtool.h> 6#include <linux/random.h> 7 8#include "netdevsim.h" 9 10static void 11nsim_get_pause_stats(struct net_device *dev, 12 struct ethtool_pause_stats *pause_stats) 13{ 14 struct netdevsim *ns = netdev_priv(dev); 15 16 if (ns->ethtool.pauseparam.report_stats_rx) 17 pause_stats->rx_pause_frames = 1; 18 if (ns->ethtool.pauseparam.report_stats_tx) 19 pause_stats->tx_pause_frames = 2; 20} 21 22static void 23nsim_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause) 24{ 25 struct netdevsim *ns = netdev_priv(dev); 26 27 pause->autoneg = 0; /* We don't support ksettings, so can't pretend */ 28 pause->rx_pause = ns->ethtool.pauseparam.rx; 29 pause->tx_pause = ns->ethtool.pauseparam.tx; 30} 31 32static int 33nsim_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam *pause) 34{ 35 struct netdevsim *ns = netdev_priv(dev); 36 37 if (pause->autoneg) 38 return -EINVAL; 39 40 ns->ethtool.pauseparam.rx = pause->rx_pause; 41 ns->ethtool.pauseparam.tx = pause->tx_pause; 42 return 0; 43} 44 45static int nsim_get_coalesce(struct net_device *dev, 46 struct ethtool_coalesce *coal, 47 struct kernel_ethtool_coalesce *kernel_coal, 48 struct netlink_ext_ack *extack) 49{ 50 struct netdevsim *ns = netdev_priv(dev); 51 52 memcpy(coal, &ns->ethtool.coalesce, sizeof(ns->ethtool.coalesce)); 53 return 0; 54} 55 56static int nsim_set_coalesce(struct net_device *dev, 57 struct ethtool_coalesce *coal, 58 struct kernel_ethtool_coalesce *kernel_coal, 59 struct netlink_ext_ack *extack) 60{ 61 struct netdevsim *ns = netdev_priv(dev); 62 63 memcpy(&ns->ethtool.coalesce, coal, sizeof(ns->ethtool.coalesce)); 64 return 0; 65} 66 67static void nsim_get_ringparam(struct net_device *dev, 68 struct ethtool_ringparam *ring, 69 struct kernel_ethtool_ringparam *kernel_ring, 70 struct netlink_ext_ack *extack) 71{ 72 struct netdevsim *ns = netdev_priv(dev); 73 74 memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring)); 75} 76 77static int nsim_set_ringparam(struct net_device *dev, 78 struct ethtool_ringparam *ring, 79 struct kernel_ethtool_ringparam *kernel_ring, 80 struct netlink_ext_ack *extack) 81{ 82 struct netdevsim *ns = netdev_priv(dev); 83 84 ns->ethtool.ring.rx_pending = ring->rx_pending; 85 ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending; 86 ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending; 87 ns->ethtool.ring.tx_pending = ring->tx_pending; 88 return 0; 89} 90 91static void 92nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch) 93{ 94 struct netdevsim *ns = netdev_priv(dev); 95 96 ch->max_combined = ns->nsim_bus_dev->num_queues; 97 ch->combined_count = ns->ethtool.channels; 98} 99 100static int 101nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch) 102{ 103 struct netdevsim *ns = netdev_priv(dev); 104 int err; 105 106 err = netif_set_real_num_queues(dev, ch->combined_count, 107 ch->combined_count); 108 if (err) 109 return err; 110 111 ns->ethtool.channels = ch->combined_count; 112 return 0; 113} 114 115static int 116nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 117{ 118 struct netdevsim *ns = netdev_priv(dev); 119 120 if (ns->ethtool.get_err) 121 return -ns->ethtool.get_err; 122 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 123 return 0; 124} 125 126static int 127nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 128{ 129 struct netdevsim *ns = netdev_priv(dev); 130 u32 fec; 131 132 if (ns->ethtool.set_err) 133 return -ns->ethtool.set_err; 134 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 135 fec = fecparam->fec; 136 if (fec == ETHTOOL_FEC_AUTO) 137 fec |= ETHTOOL_FEC_OFF; 138 fec |= ETHTOOL_FEC_NONE; 139 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 140 return 0; 141} 142 143static const struct ethtool_ops nsim_ethtool_ops = { 144 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 145 .get_pause_stats = nsim_get_pause_stats, 146 .get_pauseparam = nsim_get_pauseparam, 147 .set_pauseparam = nsim_set_pauseparam, 148 .set_coalesce = nsim_set_coalesce, 149 .get_coalesce = nsim_get_coalesce, 150 .get_ringparam = nsim_get_ringparam, 151 .set_ringparam = nsim_set_ringparam, 152 .get_channels = nsim_get_channels, 153 .set_channels = nsim_set_channels, 154 .get_fecparam = nsim_get_fecparam, 155 .set_fecparam = nsim_set_fecparam, 156}; 157 158static void nsim_ethtool_ring_init(struct netdevsim *ns) 159{ 160 ns->ethtool.ring.rx_max_pending = 4096; 161 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 162 ns->ethtool.ring.rx_mini_max_pending = 4096; 163 ns->ethtool.ring.tx_max_pending = 4096; 164} 165 166void nsim_ethtool_init(struct netdevsim *ns) 167{ 168 struct dentry *ethtool, *dir; 169 170 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 171 172 nsim_ethtool_ring_init(ns); 173 174 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 175 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 176 177 ns->ethtool.channels = ns->nsim_bus_dev->num_queues; 178 179 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 180 181 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 182 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 183 184 dir = debugfs_create_dir("pause", ethtool); 185 debugfs_create_bool("report_stats_rx", 0600, dir, 186 &ns->ethtool.pauseparam.report_stats_rx); 187 debugfs_create_bool("report_stats_tx", 0600, dir, 188 &ns->ethtool.pauseparam.report_stats_tx); 189 190 dir = debugfs_create_dir("ring", ethtool); 191 debugfs_create_u32("rx_max_pending", 0600, dir, 192 &ns->ethtool.ring.rx_max_pending); 193 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 194 &ns->ethtool.ring.rx_jumbo_max_pending); 195 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 196 &ns->ethtool.ring.rx_mini_max_pending); 197 debugfs_create_u32("tx_max_pending", 0600, dir, 198 &ns->ethtool.ring.tx_max_pending); 199}