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 ns->ethtool.ring.rx_pending = ring->rx_pending; 81 ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending; 82 ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending; 83 ns->ethtool.ring.tx_pending = ring->tx_pending; 84 return 0; 85 } 86 87 static void 88 nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch) 89 { 90 struct netdevsim *ns = netdev_priv(dev); 91 92 ch->max_combined = ns->nsim_bus_dev->num_queues; 93 ch->combined_count = ns->ethtool.channels; 94 } 95 96 static int 97 nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch) 98 { 99 struct netdevsim *ns = netdev_priv(dev); 100 int err; 101 102 err = netif_set_real_num_queues(dev, ch->combined_count, 103 ch->combined_count); 104 if (err) 105 return err; 106 107 ns->ethtool.channels = ch->combined_count; 108 return 0; 109 } 110 111 static int 112 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 113 { 114 struct netdevsim *ns = netdev_priv(dev); 115 116 if (ns->ethtool.get_err) 117 return -ns->ethtool.get_err; 118 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 119 return 0; 120 } 121 122 static int 123 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 124 { 125 struct netdevsim *ns = netdev_priv(dev); 126 u32 fec; 127 128 if (ns->ethtool.set_err) 129 return -ns->ethtool.set_err; 130 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 131 fec = fecparam->fec; 132 if (fec == ETHTOOL_FEC_AUTO) 133 fec |= ETHTOOL_FEC_OFF; 134 fec |= ETHTOOL_FEC_NONE; 135 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 136 return 0; 137 } 138 139 static const struct ethtool_ops nsim_ethtool_ops = { 140 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 141 .get_pause_stats = nsim_get_pause_stats, 142 .get_pauseparam = nsim_get_pauseparam, 143 .set_pauseparam = nsim_set_pauseparam, 144 .set_coalesce = nsim_set_coalesce, 145 .get_coalesce = nsim_get_coalesce, 146 .get_ringparam = nsim_get_ringparam, 147 .set_ringparam = nsim_set_ringparam, 148 .get_channels = nsim_get_channels, 149 .set_channels = nsim_set_channels, 150 .get_fecparam = nsim_get_fecparam, 151 .set_fecparam = nsim_set_fecparam, 152 }; 153 154 static void nsim_ethtool_ring_init(struct netdevsim *ns) 155 { 156 ns->ethtool.ring.rx_max_pending = 4096; 157 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 158 ns->ethtool.ring.rx_mini_max_pending = 4096; 159 ns->ethtool.ring.tx_max_pending = 4096; 160 } 161 162 void nsim_ethtool_init(struct netdevsim *ns) 163 { 164 struct dentry *ethtool, *dir; 165 166 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 167 168 nsim_ethtool_ring_init(ns); 169 170 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 171 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 172 173 ns->ethtool.channels = ns->nsim_bus_dev->num_queues; 174 175 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 176 177 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 178 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 179 180 dir = debugfs_create_dir("pause", ethtool); 181 debugfs_create_bool("report_stats_rx", 0600, dir, 182 &ns->ethtool.pauseparam.report_stats_rx); 183 debugfs_create_bool("report_stats_tx", 0600, dir, 184 &ns->ethtool.pauseparam.report_stats_tx); 185 186 dir = debugfs_create_dir("ring", ethtool); 187 debugfs_create_u32("rx_max_pending", 0600, dir, 188 &ns->ethtool.ring.rx_max_pending); 189 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 190 &ns->ethtool.ring.rx_jumbo_max_pending); 191 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 192 &ns->ethtool.ring.rx_mini_max_pending); 193 debugfs_create_u32("tx_max_pending", 0600, dir, 194 &ns->ethtool.ring.tx_max_pending); 195 } 196