1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2020 Facebook 3 4 #include <linux/debugfs.h> 5 #include <linux/random.h> 6 #include <net/netdev_queues.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 kernel_ring->hds_thresh_max = NSIM_HDS_THRESHOLD_MAX; 76 77 if (dev->cfg->hds_config == ETHTOOL_TCP_DATA_SPLIT_UNKNOWN) 78 kernel_ring->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED; 79 } 80 81 static int nsim_set_ringparam(struct net_device *dev, 82 struct ethtool_ringparam *ring, 83 struct kernel_ethtool_ringparam *kernel_ring, 84 struct netlink_ext_ack *extack) 85 { 86 struct netdevsim *ns = netdev_priv(dev); 87 88 ns->ethtool.ring.rx_pending = ring->rx_pending; 89 ns->ethtool.ring.rx_jumbo_pending = ring->rx_jumbo_pending; 90 ns->ethtool.ring.rx_mini_pending = ring->rx_mini_pending; 91 ns->ethtool.ring.tx_pending = ring->tx_pending; 92 return 0; 93 } 94 95 static void 96 nsim_get_channels(struct net_device *dev, struct ethtool_channels *ch) 97 { 98 struct netdevsim *ns = netdev_priv(dev); 99 100 ch->max_combined = ns->nsim_bus_dev->num_queues; 101 ch->combined_count = ns->ethtool.channels; 102 } 103 104 static int 105 nsim_set_channels(struct net_device *dev, struct ethtool_channels *ch) 106 { 107 struct netdevsim *ns = netdev_priv(dev); 108 int err; 109 110 err = netif_set_real_num_queues(dev, ch->combined_count, 111 ch->combined_count); 112 if (err) 113 return err; 114 115 ns->ethtool.channels = ch->combined_count; 116 return 0; 117 } 118 119 static int 120 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 121 { 122 struct netdevsim *ns = netdev_priv(dev); 123 124 if (ns->ethtool.get_err) 125 return -ns->ethtool.get_err; 126 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 127 return 0; 128 } 129 130 static int 131 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 132 { 133 struct netdevsim *ns = netdev_priv(dev); 134 u32 fec; 135 136 if (ns->ethtool.set_err) 137 return -ns->ethtool.set_err; 138 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 139 fec = fecparam->fec; 140 if (fec == ETHTOOL_FEC_AUTO) 141 fec |= ETHTOOL_FEC_OFF; 142 fec |= ETHTOOL_FEC_NONE; 143 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 144 return 0; 145 } 146 147 static void 148 nsim_get_fec_stats(struct net_device *dev, struct ethtool_fec_stats *fec_stats) 149 { 150 fec_stats->corrected_blocks.total = 123; 151 fec_stats->uncorrectable_blocks.total = 4; 152 } 153 154 static int nsim_get_ts_info(struct net_device *dev, 155 struct kernel_ethtool_ts_info *info) 156 { 157 struct netdevsim *ns = netdev_priv(dev); 158 159 info->phc_index = mock_phc_index(ns->phc); 160 161 return 0; 162 } 163 164 static const struct ethtool_ops nsim_ethtool_ops = { 165 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 166 .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT | 167 ETHTOOL_RING_USE_HDS_THRS, 168 .get_pause_stats = nsim_get_pause_stats, 169 .get_pauseparam = nsim_get_pauseparam, 170 .set_pauseparam = nsim_set_pauseparam, 171 .set_coalesce = nsim_set_coalesce, 172 .get_coalesce = nsim_get_coalesce, 173 .get_ringparam = nsim_get_ringparam, 174 .set_ringparam = nsim_set_ringparam, 175 .get_channels = nsim_get_channels, 176 .set_channels = nsim_set_channels, 177 .get_fecparam = nsim_get_fecparam, 178 .set_fecparam = nsim_set_fecparam, 179 .get_fec_stats = nsim_get_fec_stats, 180 .get_ts_info = nsim_get_ts_info, 181 }; 182 183 static void nsim_ethtool_ring_init(struct netdevsim *ns) 184 { 185 ns->ethtool.ring.rx_pending = 512; 186 ns->ethtool.ring.rx_max_pending = 4096; 187 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 188 ns->ethtool.ring.rx_mini_max_pending = 4096; 189 ns->ethtool.ring.tx_pending = 512; 190 ns->ethtool.ring.tx_max_pending = 4096; 191 } 192 193 void nsim_ethtool_init(struct netdevsim *ns) 194 { 195 struct dentry *ethtool, *dir; 196 197 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 198 199 nsim_ethtool_ring_init(ns); 200 201 ns->ethtool.pauseparam.report_stats_rx = true; 202 ns->ethtool.pauseparam.report_stats_tx = true; 203 204 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 205 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 206 207 ns->ethtool.channels = ns->nsim_bus_dev->num_queues; 208 209 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 210 211 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 212 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 213 214 dir = debugfs_create_dir("pause", ethtool); 215 debugfs_create_bool("report_stats_rx", 0600, dir, 216 &ns->ethtool.pauseparam.report_stats_rx); 217 debugfs_create_bool("report_stats_tx", 0600, dir, 218 &ns->ethtool.pauseparam.report_stats_tx); 219 220 dir = debugfs_create_dir("ring", ethtool); 221 debugfs_create_u32("rx_max_pending", 0600, dir, 222 &ns->ethtool.ring.rx_max_pending); 223 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 224 &ns->ethtool.ring.rx_jumbo_max_pending); 225 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 226 &ns->ethtool.ring.rx_mini_max_pending); 227 debugfs_create_u32("tx_max_pending", 0600, dir, 228 &ns->ethtool.ring.tx_max_pending); 229 } 230