af40da894e
Add "ipoib_use_lro" module parameter to enable LRO and an "ipoib_lro_max_aggr" module parameter to set the max number of packets to be aggregated. Make LRO controllable and LRO statistics accessible through ethtool. Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.co.il> Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/*
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* Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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#include "ipoib.h"
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static void ipoib_get_drvinfo(struct net_device *netdev,
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struct ethtool_drvinfo *drvinfo)
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{
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strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1);
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}
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static int ipoib_get_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;
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coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs;
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coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
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coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;
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return 0;
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}
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static int ipoib_set_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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int ret;
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/*
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* Since IPoIB uses a single CQ for both rx and tx, we assume
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* that rx params dictate the configuration. These values are
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* saved in the private data and returned when ipoib_get_coalesce()
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* is called.
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*/
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if (coal->rx_coalesce_usecs > 0xffff ||
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coal->rx_max_coalesced_frames > 0xffff)
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return -EINVAL;
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ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames,
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coal->rx_coalesce_usecs);
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if (ret && ret != -ENOSYS) {
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ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);
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return ret;
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}
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coal->tx_coalesce_usecs = coal->rx_coalesce_usecs;
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coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames;
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priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;
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priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;
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return 0;
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}
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static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = {
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"LRO aggregated", "LRO flushed",
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"LRO avg aggr", "LRO no desc"
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};
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static void ipoib_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
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{
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switch (stringset) {
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case ETH_SS_STATS:
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memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys));
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break;
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}
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}
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static int ipoib_get_sset_count(struct net_device *dev, int sset)
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{
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switch (sset) {
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case ETH_SS_STATS:
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return ARRAY_SIZE(ipoib_stats_keys);
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default:
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return -EOPNOTSUPP;
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}
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}
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static void ipoib_get_ethtool_stats(struct net_device *dev,
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struct ethtool_stats *stats, uint64_t *data)
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{
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struct ipoib_dev_priv *priv = netdev_priv(dev);
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int index = 0;
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/* Get LRO statistics */
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data[index++] = priv->lro.lro_mgr.stats.aggregated;
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data[index++] = priv->lro.lro_mgr.stats.flushed;
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if (priv->lro.lro_mgr.stats.flushed)
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data[index++] = priv->lro.lro_mgr.stats.aggregated /
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priv->lro.lro_mgr.stats.flushed;
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else
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data[index++] = 0;
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data[index++] = priv->lro.lro_mgr.stats.no_desc;
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}
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static const struct ethtool_ops ipoib_ethtool_ops = {
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.get_drvinfo = ipoib_get_drvinfo,
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.get_tso = ethtool_op_get_tso,
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.get_coalesce = ipoib_get_coalesce,
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.set_coalesce = ipoib_set_coalesce,
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.get_flags = ethtool_op_get_flags,
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.set_flags = ethtool_op_set_flags,
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.get_strings = ipoib_get_strings,
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.get_sset_count = ipoib_get_sset_count,
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.get_ethtool_stats = ipoib_get_ethtool_stats,
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};
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void ipoib_set_ethtool_ops(struct net_device *dev)
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{
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SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops);
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}
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