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 };
  57
  58 #define IPOIB_GLOBAL_STATS_LEN  ARRAY_SIZE(ipoib_gstrings_stats)
  59
  60 static void ipoib_get_drvinfo(struct net_device *netdev,
  61                               struct ethtool_drvinfo *drvinfo)
  62 {
  63         struct ipoib_dev_priv *priv = netdev_priv(netdev);
  64
  65         ib_get_device_fw_str(priv->ca, drvinfo->fw_version,
  66                              sizeof(drvinfo->fw_version));
  67
  68         strlcpy(drvinfo->bus_info, dev_name(priv->ca->dma_device),
  69                 sizeof(drvinfo->bus_info));
  70
  71         strlcpy(drvinfo->version, ipoib_driver_version,
  72                 sizeof(drvinfo->version));
  73
  74         strlcpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));
  75 }
  76
  77 static int ipoib_get_coalesce(struct net_device *dev,
  78                               struct ethtool_coalesce *coal)
  79 {
  80         struct ipoib_dev_priv *priv = netdev_priv(dev);
  81
  82         coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  83         coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  84
  85         return 0;
  86 }
  87
  88 static int ipoib_set_coalesce(struct net_device *dev,
  89                               struct ethtool_coalesce *coal)
  90 {
  91         struct ipoib_dev_priv *priv = netdev_priv(dev);
  92         int ret;
  93
  94         /*
  95          * These values are saved in the private data and returned
  96          * when ipoib_get_coalesce() is called
  97          */
  98         if (coal->rx_coalesce_usecs       > 0xffff ||
  99             coal->rx_max_coalesced_frames > 0xffff)
 100                 return -EINVAL;
 101
 102         ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
 103                            coal->rx_coalesce_usecs);
 104         if (ret && ret != -ENOSYS) {
 105                 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
 106                 return ret;
 107         }
 108
 109         priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
 110         priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
 111
 112         return 0;
 113 }
 114 static void ipoib_get_ethtool_stats(struct net_device *dev,
 115                                     struct ethtool_stats __always_unused *stats,
 116                                     u64 *data)
 117 {
 118         int i;
 119         struct net_device_stats *net_stats = &dev->stats;
 120         u8 *p = (u8 *)net_stats;
 121
 122         for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)
 123                 data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);
 124
 125 }
 126 static void ipoib_get_strings(struct net_device __always_unused *dev,
 127                               u32 stringset, u8 *data)
 128 {
 129         u8 *p = data;
 130         int i;
 131
 132         switch (stringset) {
 133         case ETH_SS_STATS:
 134                 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {
 135                         memcpy(p, ipoib_gstrings_stats[i].stat_string,
 136                                 ETH_GSTRING_LEN);
 137                         p += ETH_GSTRING_LEN;
 138                 }
 139                 break;
 140         case ETH_SS_TEST:
 141         default:
 142                 break;
 143         }
 144 }
 145 static int ipoib_get_sset_count(struct net_device __always_unused *dev,
 146                                  int sset)
 147 {
 148         switch (sset) {
 149         case ETH_SS_STATS:
 150                 return IPOIB_GLOBAL_STATS_LEN;
 151         case ETH_SS_TEST:
 152         default:
 153                 break;
 154         }
 155         return -EOPNOTSUPP;
 156 }
 157
 158 static const struct ethtool_ops ipoib_ethtool_ops = {
 159         .get_drvinfo            = ipoib_get_drvinfo,
 160         .get_coalesce           = ipoib_get_coalesce,
 161         .set_coalesce           = ipoib_set_coalesce,
 162         .get_strings            = ipoib_get_strings,
 163         .get_ethtool_stats      = ipoib_get_ethtool_stats,
 164         .get_sset_count         = ipoib_get_sset_count,
 165 };
 166
 167 void ipoib_set_ethtool_ops(struct net_device *dev)
 168 {
 169         dev->ethtool_ops = &ipoib_ethtool_ops;
 170 }