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 { 70 struct netdevsim *ns = netdev_priv(dev); 71 72 memcpy(ring, &ns->ethtool.ring, sizeof(ns->ethtool.ring)); 73 } 74 75 static int nsim_set_ringparam(struct net_device *dev, 76 struct ethtool_ringparam *ring) 77 { 78 struct netdevsim *ns = netdev_priv(dev); 79 80 memcpy(&ns->ethtool.ring, ring, sizeof(ns->ethtool.ring)); 81 return 0; 82 } 83 84 static void 85 nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch) 86 { 87 struct netdevsim *ns = netdev_priv(dev); 88 89 ch->max_combined = ns->nsim_bus_dev->num_queues; 90 ch->combined_count = ns->ethtool.channels; 91 } 92 93 static int 94 nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch) 95 { 96 struct netdevsim *ns = netdev_priv(dev); 97 int err; 98 99 err = netif_set_real_num_queues(dev, ch->combined_count, 100 ch->combined_count); 101 if (err) 102 return err; 103 104 ns->ethtool.channels = ch->combined_count; 105 return 0; 106 } 107 108 static int 109 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 110 { 111 struct netdevsim *ns = netdev_priv(dev); 112 113 if (ns->ethtool.get_err) 114 return -ns->ethtool.get_err; 115 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 116 return 0; 117 } 118 119 static int 120 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 121 { 122 struct netdevsim *ns = netdev_priv(dev); 123 u32 fec; 124 125 if (ns->ethtool.set_err) 126 return -ns->ethtool.set_err; 127 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 128 fec = fecparam->fec; 129 if (fec == ETHTOOL_FEC_AUTO) 130 fec |= ETHTOOL_FEC_OFF; 131 fec |= ETHTOOL_FEC_NONE; 132 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 133 return 0; 134 } 135 136 static const struct ethtool_ops nsim_ethtool_ops = { 137 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 138 .get_pause_stats = nsim_get_pause_stats, 139 .get_pauseparam = nsim_get_pauseparam, 140 .set_pauseparam = nsim_set_pauseparam, 141 .set_coalesce = nsim_set_coalesce, 142 .get_coalesce = nsim_get_coalesce, 143 .get_ringparam = nsim_get_ringparam, 144 .set_ringparam = nsim_set_ringparam, 145 .get_channels = nsim_get_channels, 146 .set_channels = nsim_set_channels, 147 .get_fecparam = nsim_get_fecparam, 148 .set_fecparam = nsim_set_fecparam, 149 }; 150 151 static void nsim_ethtool_ring_init(struct netdevsim *ns) 152 { 153 ns->ethtool.ring.rx_max_pending = 4096; 154 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 155 ns->ethtool.ring.rx_mini_max_pending = 4096; 156 ns->ethtool.ring.tx_max_pending = 4096; 157 } 158 159 void nsim_ethtool_init(struct netdevsim *ns) 160 { 161 struct dentry *ethtool, *dir; 162 163 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 164 165 nsim_ethtool_ring_init(ns); 166 167 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 168 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 169 170 ns->ethtool.channels = ns->nsim_bus_dev->num_queues; 171 172 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 173 174 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 175 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 176 177 dir = debugfs_create_dir("pause", ethtool); 178 debugfs_create_bool("report_stats_rx", 0600, dir, 179 &ns->ethtool.pauseparam.report_stats_rx); 180 debugfs_create_bool("report_stats_tx", 0600, dir, 181 &ns->ethtool.pauseparam.report_stats_tx); 182 183 dir = debugfs_create_dir("ring", ethtool); 184 debugfs_create_u32("rx_max_pending", 0600, dir, 185 &ns->ethtool.ring.rx_max_pending); 186 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 187 &ns->ethtool.ring.rx_jumbo_max_pending); 188 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 189 &ns->ethtool.ring.rx_mini_max_pending); 190 debugfs_create_u32("tx_max_pending", 0600, dir, 191 &ns->ethtool.ring.tx_max_pending); 192 } 193