drivers/net/netdevsim/ethtool.c

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