drivers/infiniband/ulp/ipoib/ipoib_ethtool.c

   1 /*
   2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/netdevice.h>
  36
  37 #include "ipoib.h"
  38
  39 struct ipoib_stats {
  40         char stat_string[ETH_GSTRING_LEN];
  41         int stat_offset;
  42 };
  43
  44 #define IPOIB_NETDEV_STAT(m) { \
  45                 .stat_string = #m, \
  46                 .stat_offset = offsetof(struct rtnl_link_stats64, m) }
  47
  48 static const struct ipoib_stats ipoib_gstrings_stats[] = {
  49         IPOIB_NETDEV_STAT(rx_packets),
  50         IPOIB_NETDEV_STAT(tx_packets),
  51         IPOIB_NETDEV_STAT(rx_bytes),
  52         IPOIB_NETDEV_STAT(tx_bytes),
  53         IPOIB_NETDEV_STAT(tx_errors),
  54         IPOIB_NETDEV_STAT(rx_dropped),
  55         IPOIB_NETDEV_STAT(tx_dropped),
  56         IPOIB_NETDEV_STAT(multicast),
  57 };
  58
  59 #define IPOIB_GLOBAL_STATS_LEN  ARRAY_SIZE(ipoib_gstrings_stats)
  60
  61 static void ipoib_get_drvinfo(struct net_device *netdev,
  62                               struct ethtool_drvinfo *drvinfo)
  63 {
  64         struct ipoib_dev_priv *priv = ipoib_priv(netdev);
  65
  66         ib_get_device_fw_str(priv->ca, drvinfo->fw_version);
  67
  68         strlcpy(drvinfo->bus_info, dev_name(priv->ca->dev.parent),
  69                 sizeof(drvinfo->bus_info));
  70
  71         strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
  72 }
  73
  74 static int ipoib_get_coalesce(struct net_device *dev,
  75                               struct ethtool_coalesce *coal)
  76 {
  77         struct ipoib_dev_priv *priv = ipoib_priv(dev);
  78
  79         coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  80         coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  81
  82         return 0;
  83 }
  84
  85 static int ipoib_set_coalesce(struct net_device *dev,
  86                               struct ethtool_coalesce *coal)
  87 {
  88         struct ipoib_dev_priv *priv = ipoib_priv(dev);
  89         int ret;
  90
  91         /*
  92          * These values are saved in the private data and returned
  93          * when ipoib_get_coalesce() is called
  94          */
  95         if (coal->rx_coalesce_usecs       > 0xffff ||
  96             coal->rx_max_coalesced_frames > 0xffff)
  97                 return -EINVAL;
  98
  99         ret = rdma_set_cq_moderation(priv->recv_cq,
 100                                      coal->rx_max_coalesced_frames,
 101                                      coal->rx_coalesce_usecs);
 102         if (ret && ret != -EOPNOTSUPP) {
 103                 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
 104                 return ret;
 105         }
 106
 107         priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
 108         priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
 109
 110         return 0;
 111 }
 112 static void ipoib_get_ethtool_stats(struct net_device *dev,
 113                                     struct ethtool_stats __always_unused *stats,
 114                                     u64 *data)
 115 {
 116         int i;
 117         struct net_device_stats *net_stats = &dev->stats;
 118         u8 *p = (u8 *)net_stats;
 119
 120         for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
 121                 data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
 122
 123 }
 124 static void ipoib_get_strings(struct net_device __always_unused *dev,
 125                               u32 stringset, u8 *data)
 126 {
 127         u8 *p = data;
 128         int i;
 129
 130         switch (stringset) {
 131         case ETH_SS_STATS:
 132                 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
 133                         memcpy(p, ipoib_gstrings_stats[i].stat_string,
 134                                 ETH_GSTRING_LEN);
 135                         p += ETH_GSTRING_LEN;
 136                 }
 137                 break;
 138         default:
 139                 break;
 140         }
 141 }
 142 static int ipoib_get_sset_count(struct net_device __always_unused *dev,
 143                                  int sset)
 144 {
 145         switch (sset) {
 146         case ETH_SS_STATS:
 147                 return IPOIB_GLOBAL_STATS_LEN;
 148         default:
 149                 break;
 150         }
 151         return -EOPNOTSUPP;
 152 }
 153
 154 /* Return lane speed in unit of 1e6 bit/sec */
 155 static inline int ib_speed_enum_to_int(int speed)
 156 {
 157         switch (speed) {
 158         case IB_SPEED_SDR:
 159                 return SPEED_2500;
 160         case IB_SPEED_DDR:
 161                 return SPEED_5000;
 162         case IB_SPEED_QDR:
 163         case IB_SPEED_FDR10:
 164                 return SPEED_10000;
 165         case IB_SPEED_FDR:
 166                 return SPEED_14000;
 167         case IB_SPEED_EDR:
 168                 return SPEED_25000;
 169         case IB_SPEED_HDR:
 170                 return SPEED_50000;
 171         case IB_SPEED_NDR:
 172                 return SPEED_100000;
 173         }
 174
 175         return SPEED_UNKNOWN;
 176 }
 177
 178 static int ipoib_get_link_ksettings(struct net_device *netdev,
 179                                     struct ethtool_link_ksettings *cmd)
 180 {
 181         struct ipoib_dev_priv *priv = ipoib_priv(netdev);
 182         struct ib_port_attr attr;
 183         int ret, speed, width;
 184
 185         if (!netif_carrier_ok(netdev)) {
 186                 cmd->base.speed = SPEED_UNKNOWN;
 187                 cmd->base.duplex = DUPLEX_UNKNOWN;
 188                 return 0;
 189         }
 190
 191         ret = ib_query_port(priv->ca, priv->port, &attr);
 192         if (ret < 0)
 193                 return -EINVAL;
 194
 195         speed = ib_speed_enum_to_int(attr.active_speed);
 196         width = ib_width_enum_to_int(attr.active_width);
 197
 198         if (speed < 0 || width < 0)
 199                 return -EINVAL;
 200
 201         /* Except the following are set, the other members of
 202          * the struct ethtool_link_settings are initialized to
 203          * zero in the function __ethtool_get_link_ksettings.
 204          */
 205         cmd->base.speed          = speed * width;
 206         cmd->base.duplex         = DUPLEX_FULL;
 207
 208         cmd->base.phy_address    = 0xFF;
 209
 210         cmd->base.autoneg        = AUTONEG_ENABLE;
 211         cmd->base.port           = PORT_OTHER;
 212
 213         return 0;
 214 }
 215
 216 static const struct ethtool_ops ipoib_ethtool_ops = {
 217         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
 218                                      ETHTOOL_COALESCE_RX_MAX_FRAMES,
 219         .get_link_ksettings     = ipoib_get_link_ksettings,
 220         .get_drvinfo            = ipoib_get_drvinfo,
 221         .get_coalesce           = ipoib_get_coalesce,
 222         .set_coalesce           = ipoib_set_coalesce,
 223         .get_strings            = ipoib_get_strings,
 224         .get_ethtool_stats      = ipoib_get_ethtool_stats,
 225         .get_sset_count         = ipoib_get_sset_count,
 226         .get_link               = ethtool_op_get_link,
 227 };
 228
 229 void ipoib_set_ethtool_ops(struct net_device *dev)
 230 {
 231         dev->ethtool_ops = &ipoib_ethtool_ops;
 232 }