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_get_coalesce(struct net_device *dev,
  53                               struct ethtool_coalesce *coal)
  54 {
  55         struct ipoib_dev_priv *priv = netdev_priv(dev);
  56
  57         coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  58         coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
  59         coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  60         coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
  61
  62         return 0;
  63 }
  64
  65 static int ipoib_set_coalesce(struct net_device *dev,
  66                               struct ethtool_coalesce *coal)
  67 {
  68         struct ipoib_dev_priv *priv = netdev_priv(dev);
  69         int ret;
  70
  71         /*
  72          * Since IPoIB uses a single CQ for both rx and tx, we assume
  73          * that rx params dictate the configuration.  These values are
  74          * saved in the private data and returned when ipoib_get_coalesce()
  75          * is called.
  76          */
  77         if (coal->rx_coalesce_usecs       > 0xffff ||
  78             coal->rx_max_coalesced_frames > 0xffff)
  79                 return -EINVAL;
  80
  81         ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
  82                            coal->rx_coalesce_usecs);
  83         if (ret && ret != -ENOSYS) {
  84                 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
  85                 return ret;
  86         }
  87
  88         coal->tx_coalesce_usecs       = coal->rx_coalesce_usecs;
  89         coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
  90         priv->ethtool.coalesce_usecs       = coal->rx_coalesce_usecs;
  91         priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
  92
  93         return 0;
  94 }
  95
  96 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
  97         "LRO aggregated", "LRO flushed",
  98         "LRO avg aggr", "LRO no desc"
  99 };
 100
 101 static void ipoib_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 102 {
 103         switch (stringset) {
 104         case ETH_SS_STATS:
 105                 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys));
 106                 break;
 107         }
 108 }
 109
 110 static int ipoib_get_sset_count(struct net_device *dev, int sset)
 111 {
 112         switch (sset) {
 113         case ETH_SS_STATS:
 114                 return ARRAY_SIZE(ipoib_stats_keys);
 115         default:
 116                 return -EOPNOTSUPP;
 117         }
 118 }
 119
 120 static void ipoib_get_ethtool_stats(struct net_device *dev,
 121                                 struct ethtool_stats *stats, uint64_t *data)
 122 {
 123         struct ipoib_dev_priv *priv = netdev_priv(dev);
 124         int index = 0;
 125
 126         /* Get LRO statistics */
 127         data[index++] = priv->lro.lro_mgr.stats.aggregated;
 128         data[index++] = priv->lro.lro_mgr.stats.flushed;
 129         if (priv->lro.lro_mgr.stats.flushed)
 130                 data[index++] = priv->lro.lro_mgr.stats.aggregated /
 131                                 priv->lro.lro_mgr.stats.flushed;
 132         else
 133                 data[index++] = 0;
 134         data[index++] = priv->lro.lro_mgr.stats.no_desc;
 135 }
 136
 137 static const struct ethtool_ops ipoib_ethtool_ops = {
 138         .get_drvinfo            = ipoib_get_drvinfo,
 139         .get_rx_csum            = ipoib_get_rx_csum,
 140         .get_coalesce           = ipoib_get_coalesce,
 141         .set_coalesce           = ipoib_set_coalesce,
 142         .get_flags              = ethtool_op_get_flags,
 143         .set_flags              = ethtool_op_set_flags,
 144         .get_strings            = ipoib_get_strings,
 145         .get_sset_count         = ipoib_get_sset_count,
 146         .get_ethtool_stats      = ipoib_get_ethtool_stats,
 147 };
 148
 149 void ipoib_set_ethtool_ops(struct net_device *dev)
 150 {
 151         SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
 152 }