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 static void ipoib_get_drvinfo(struct net_device *netdev,
  40                               struct ethtool_drvinfo *drvinfo)
  41 {
  42         strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
  43 }
  44
  45 static u32 ipoib_get_rx_csum(struct net_device *dev)
  46 {
  47         struct ipoib_dev_priv *priv = netdev_priv(dev);
  48         return test_bit(IPOIB_FLAG_CSUM, &priv->flags) &&
  49                 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
  50 }
  51
  52 static int ipoib_set_tso(struct net_device *dev, u32 data)
  53 {
  54         struct ipoib_dev_priv *priv = netdev_priv(dev);
  55
  56         if (data) {
  57                 if (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) &&
  58                     (dev->features & NETIF_F_SG) &&
  59                     (priv->hca_caps & IB_DEVICE_UD_TSO)) {
  60                         dev->features |= NETIF_F_TSO;
  61                 } else {
  62                         ipoib_warn(priv, "can't set TSO on\n");
  63                         return -EOPNOTSUPP;
  64                 }
  65         } else
  66                 dev->features &= ~NETIF_F_TSO;
  67
  68         return 0;
  69 }
  70
  71 static int ipoib_get_coalesce(struct net_device *dev,
  72                               struct ethtool_coalesce *coal)
  73 {
  74         struct ipoib_dev_priv *priv = netdev_priv(dev);
  75
  76         coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  77         coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  78
  79         return 0;
  80 }
  81
  82 static int ipoib_set_coalesce(struct net_device *dev,
  83                               struct ethtool_coalesce *coal)
  84 {
  85         struct ipoib_dev_priv *priv = netdev_priv(dev);
  86         int ret;
  87
  88         /*
  89          * These values are saved in the private data and returned
  90          * when ipoib_get_coalesce() is called
  91          */
  92         if (coal->rx_coalesce_usecs       > 0xffff ||
  93             coal->rx_max_coalesced_frames > 0xffff)
  94                 return -EINVAL;
  95
  96         ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
  97                            coal->rx_coalesce_usecs);
  98         if (ret && ret != -ENOSYS) {
  99                 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
 100                 return ret;
 101         }
 102
 103         priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
 104         priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
 105
 106         return 0;
 107 }
 108
 109 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
 110         "LRO aggregated", "LRO flushed",
 111         "LRO avg aggr", "LRO no desc"
 112 };
 113
 114 static void ipoib_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 115 {
 116         switch (stringset) {
 117         case ETH_SS_STATS:
 118                 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys));
 119                 break;
 120         }
 121 }
 122
 123 static int ipoib_get_sset_count(struct net_device *dev, int sset)
 124 {
 125         switch (sset) {
 126         case ETH_SS_STATS:
 127                 return ARRAY_SIZE(ipoib_stats_keys);
 128         default:
 129                 return -EOPNOTSUPP;
 130         }
 131 }
 132
 133 static void ipoib_get_ethtool_stats(struct net_device *dev,
 134                                 struct ethtool_stats *stats, uint64_t *data)
 135 {
 136         struct ipoib_dev_priv *priv = netdev_priv(dev);
 137         int index = 0;
 138
 139         /* Get LRO statistics */
 140         data[index++] = priv->lro.lro_mgr.stats.aggregated;
 141         data[index++] = priv->lro.lro_mgr.stats.flushed;
 142         if (priv->lro.lro_mgr.stats.flushed)
 143                 data[index++] = priv->lro.lro_mgr.stats.aggregated /
 144                                 priv->lro.lro_mgr.stats.flushed;
 145         else
 146                 data[index++] = 0;
 147         data[index++] = priv->lro.lro_mgr.stats.no_desc;
 148 }
 149
 150 static const struct ethtool_ops ipoib_ethtool_ops = {
 151         .get_drvinfo            = ipoib_get_drvinfo,
 152         .get_rx_csum            = ipoib_get_rx_csum,
 153         .set_tso                = ipoib_set_tso,
 154         .get_coalesce           = ipoib_get_coalesce,
 155         .set_coalesce           = ipoib_set_coalesce,
 156         .get_flags              = ethtool_op_get_flags,
 157         .set_flags              = ethtool_op_set_flags,
 158         .get_strings            = ipoib_get_strings,
 159         .get_sset_count         = ipoib_get_sset_count,
 160         .get_ethtool_stats      = ipoib_get_ethtool_stats,
 161 };
 162
 163 void ipoib_set_ethtool_ops(struct net_device *dev)
 164 {
 165         SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
 166 }