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 int 85 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 86 { 87 struct netdevsim *ns = netdev_priv(dev); 88 89 if (ns->ethtool.get_err) 90 return -ns->ethtool.get_err; 91 memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec)); 92 return 0; 93 } 94 95 static int 96 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam) 97 { 98 struct netdevsim *ns = netdev_priv(dev); 99 u32 fec; 100 101 if (ns->ethtool.set_err) 102 return -ns->ethtool.set_err; 103 memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec)); 104 fec = fecparam->fec; 105 if (fec == ETHTOOL_FEC_AUTO) 106 fec |= ETHTOOL_FEC_OFF; 107 fec |= ETHTOOL_FEC_NONE; 108 ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1); 109 return 0; 110 } 111 112 static const struct ethtool_ops nsim_ethtool_ops = { 113 .supported_coalesce_params = ETHTOOL_COALESCE_ALL_PARAMS, 114 .get_pause_stats = nsim_get_pause_stats, 115 .get_pauseparam = nsim_get_pauseparam, 116 .set_pauseparam = nsim_set_pauseparam, 117 .set_coalesce = nsim_set_coalesce, 118 .get_coalesce = nsim_get_coalesce, 119 .get_ringparam = nsim_get_ringparam, 120 .set_ringparam = nsim_set_ringparam, 121 .get_fecparam = nsim_get_fecparam, 122 .set_fecparam = nsim_set_fecparam, 123 }; 124 125 static void nsim_ethtool_ring_init(struct netdevsim *ns) 126 { 127 ns->ethtool.ring.rx_max_pending = 4096; 128 ns->ethtool.ring.rx_jumbo_max_pending = 4096; 129 ns->ethtool.ring.rx_mini_max_pending = 4096; 130 ns->ethtool.ring.tx_max_pending = 4096; 131 } 132 133 void nsim_ethtool_init(struct netdevsim *ns) 134 { 135 struct dentry *ethtool, *dir; 136 137 ns->netdev->ethtool_ops = &nsim_ethtool_ops; 138 139 nsim_ethtool_ring_init(ns); 140 141 ns->ethtool.fec.fec = ETHTOOL_FEC_NONE; 142 ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE; 143 144 ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir); 145 146 debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err); 147 debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err); 148 149 dir = debugfs_create_dir("pause", ethtool); 150 debugfs_create_bool("report_stats_rx", 0600, dir, 151 &ns->ethtool.pauseparam.report_stats_rx); 152 debugfs_create_bool("report_stats_tx", 0600, dir, 153 &ns->ethtool.pauseparam.report_stats_tx); 154 155 dir = debugfs_create_dir("ring", ethtool); 156 debugfs_create_u32("rx_max_pending", 0600, dir, 157 &ns->ethtool.ring.rx_max_pending); 158 debugfs_create_u32("rx_jumbo_max_pending", 0600, dir, 159 &ns->ethtool.ring.rx_jumbo_max_pending); 160 debugfs_create_u32("rx_mini_max_pending", 0600, dir, 161 &ns->ethtool.ring.rx_mini_max_pending); 162 debugfs_create_u32("tx_max_pending", 0600, dir, 163 &ns->ethtool.ring.tx_max_pending); 164 } 165