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 10 static void 11 nsim_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 22 static void 23 nsim_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 32 static int 33 nsim_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 45 static 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 56 static 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 67 static 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 77 static 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 memcpy(&ns->ethtool.ring, ring, sizeof(ns->ethtool.ring)); 85 return 0; 86 } 87 88 static void 89 nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch) 90 { 91 struct netdevsim *ns = netdev_priv(dev); 92 93 ch->max_combined = ns->nsim_bus_dev->num_queues; 94 ch->combined_count = ns->ethtool.channels; 95 } 96 97 static int 98 nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch) 99 { 100 struct netdevsim *ns = netdev_priv(dev); 101 int err; 102 103 err = netif_set_real_num_queues(dev, ch->combined_count, 104 ch->combined_count); 105 if (err) 106 return err; 107 108 ns->ethtool.channels = ch->combined_count; 109 return 0; 110 } 111 112 static int 113 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 114 { 115 struct netdevsim *ns = netdev_priv(dev); 116 117 if (ns->ethtool.get_err) 118 return -ns->ethtool.get_err; 119 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 120 return 0; 121 } 122 123 static int 124 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 125 { 126 struct netdevsim *ns = netdev_priv(dev); 127 u32 fec; 128 129 if (ns->ethtool.set_err) 130 return -ns->ethtool.set_err; 131 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 132 fec = fecparam->fec; 133 if (fec == ETHTOOL_FEC_AUTO) 134 fec |= ETHTOOL_FEC_OFF; 135 fec |= ETHTOOL_FEC_NONE; 136 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 137 return 0; 138 } 139 140 static const struct ethtool_ops nsim_ethtool_ops = { 141 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 142 .get_pause_stats = nsim_get_pause_stats, 143 .get_pauseparam = nsim_get_pauseparam, 144 .set_pauseparam = nsim_set_pauseparam, 145 .set_coalesce = nsim_set_coalesce, 146 .get_coalesce = nsim_get_coalesce, 147 .get_ringparam = nsim_get_ringparam, 148 .set_ringparam = nsim_set_ringparam, 149 .get_channels = nsim_get_channels, 150 .set_channels = nsim_set_channels, 151 .get_fecparam = nsim_get_fecparam, 152 .set_fecparam = nsim_set_fecparam, 153 }; 154 155 static void nsim_ethtool_ring_init(struct netdevsim *ns) 156 { 157 ns->ethtool.ring.rx_max_pending = 4096; 158 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 159 ns->ethtool.ring.rx_mini_max_pending = 4096; 160 ns->ethtool.ring.tx_max_pending = 4096; 161 } 162 163 void nsim_ethtool_init(struct netdevsim *ns) 164 { 165 struct dentry *ethtool, *dir; 166 167 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 168 169 nsim_ethtool_ring_init(ns); 170 171 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 172 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 173 174 ns->ethtool.channels = ns->nsim_bus_dev->num_queues; 175 176 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 177 178 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 179 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 180 181 dir = debugfs_create_dir("pause", ethtool); 182 debugfs_create_bool("report_stats_rx", 0600, dir, 183 &ns->ethtool.pauseparam.report_stats_rx); 184 debugfs_create_bool("report_stats_tx", 0600, dir, 185 &ns->ethtool.pauseparam.report_stats_tx); 186 187 dir = debugfs_create_dir("ring", ethtool); 188 debugfs_create_u32("rx_max_pending", 0600, dir, 189 &ns->ethtool.ring.rx_max_pending); 190 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 191 &ns->ethtool.ring.rx_jumbo_max_pending); 192 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 193 &ns->ethtool.ring.rx_mini_max_pending); 194 debugfs_create_u32("tx_max_pending", 0600, dir, 195 &ns->ethtool.ring.tx_max_pending); 196 } 197