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         err = netif_set_real_num_queues(dev, ch->combined_count,
 107                                         ch->combined_count);
 108         if (err)
 109                 return err;
 110
 111         ns->ethtool.channels = ch->combined_count;
 112         return 0;
 113 }
 114
 115 static int
 116 nsim_get_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
 117 {
 118         struct netdevsim *ns = netdev_priv(dev);
 119
 120         if (ns->ethtool.get_err)
 121                 return -ns->ethtool.get_err;
 122         memcpy(fecparam, &ns->ethtool.fec, sizeof(ns->ethtool.fec));
 123         return 0;
 124 }
 125
 126 static int
 127 nsim_set_fecparam(struct net_device *dev, struct ethtool_fecparam *fecparam)
 128 {
 129         struct netdevsim *ns = netdev_priv(dev);
 130         u32 fec;
 131
 132         if (ns->ethtool.set_err)
 133                 return -ns->ethtool.set_err;
 134         memcpy(&ns->ethtool.fec, fecparam, sizeof(ns->ethtool.fec));
 135         fec = fecparam->fec;
 136         if (fec == ETHTOOL_FEC_AUTO)
 137                 fec |= ETHTOOL_FEC_OFF;
 138         fec |= ETHTOOL_FEC_NONE;
 139         ns->ethtool.fec.active_fec = 1 << (fls(fec) - 1);
 140         return 0;
 141 }
 142
 143 static int nsim_get_ts_info(struct net_device *dev,
 144                             struct ethtool_ts_info *info)
 145 {
 146         struct netdevsim *ns = netdev_priv(dev);
 147
 148         info->phc_index = mock_phc_index(ns->phc);
 149
 150         return 0;
 151 }
 152
 153 static const struct ethtool_ops nsim_ethtool_ops = {
 154         .supported_coalesce_params      = ETHTOOL_COALESCE_ALL_PARAMS,
 155         .get_pause_stats                = nsim_get_pause_stats,
 156         .get_pauseparam                 = nsim_get_pauseparam,
 157         .set_pauseparam                 = nsim_set_pauseparam,
 158         .set_coalesce                   = nsim_set_coalesce,
 159         .get_coalesce                   = nsim_get_coalesce,
 160         .get_ringparam                  = nsim_get_ringparam,
 161         .set_ringparam                  = nsim_set_ringparam,
 162         .get_channels                   = nsim_get_channels,
 163         .set_channels                   = nsim_set_channels,
 164         .get_fecparam                   = nsim_get_fecparam,
 165         .set_fecparam                   = nsim_set_fecparam,
 166         .get_ts_info                    = nsim_get_ts_info,
 167 };
 168
 169 static void nsim_ethtool_ring_init(struct netdevsim *ns)
 170 {
 171         ns->ethtool.ring.rx_max_pending = 4096;
 172         ns->ethtool.ring.rx_jumbo_max_pending = 4096;
 173         ns->ethtool.ring.rx_mini_max_pending = 4096;
 174         ns->ethtool.ring.tx_max_pending = 4096;
 175 }
 176
 177 void nsim_ethtool_init(struct netdevsim *ns)
 178 {
 179         struct dentry *ethtool, *dir;
 180
 181         ns->netdev->ethtool_ops = &nsim_ethtool_ops;
 182
 183         nsim_ethtool_ring_init(ns);
 184
 185         ns->ethtool.fec.fec = ETHTOOL_FEC_NONE;
 186         ns->ethtool.fec.active_fec = ETHTOOL_FEC_NONE;
 187
 188         ns->ethtool.channels = ns->nsim_bus_dev->num_queues;
 189
 190         ethtool = debugfs_create_dir("ethtool", ns->nsim_dev_port->ddir);
 191
 192         debugfs_create_u32("get_err", 0600, ethtool, &ns->ethtool.get_err);
 193         debugfs_create_u32("set_err", 0600, ethtool, &ns->ethtool.set_err);
 194
 195         dir = debugfs_create_dir("pause", ethtool);
 196         debugfs_create_bool("report_stats_rx", 0600, dir,
 197                             &ns->ethtool.pauseparam.report_stats_rx);
 198         debugfs_create_bool("report_stats_tx", 0600, dir,
 199                             &ns->ethtool.pauseparam.report_stats_tx);
 200
 201         dir = debugfs_create_dir("ring", ethtool);
 202         debugfs_create_u32("rx_max_pending", 0600, dir,
 203                            &ns->ethtool.ring.rx_max_pending);
 204         debugfs_create_u32("rx_jumbo_max_pending", 0600, dir,
 205                            &ns->ethtool.ring.rx_jumbo_max_pending);
 206         debugfs_create_u32("rx_mini_max_pending", 0600, dir,
 207                            &ns->ethtool.ring.rx_mini_max_pending);
 208         debugfs_create_u32("tx_max_pending", 0600, dir,
 209                            &ns->ethtool.ring.tx_max_pending);
 210 }