LXR linux/drivers/infiniband/ulp/ipoib/ipoib

   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
  39static 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
  45static 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
  52static 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
  65static 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
  96static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
  97        "LRO aggregated", "LRO flushed",
  98        "LRO avg aggr", "LRO no desc"
  99};
 100
 101static 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
 110static 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
 120static 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
 137static 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
 149void ipoib_set_ethtool_ops(struct net_device *dev)
 150{
 151        SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
 152}
 153