![Amerigo Wang](/assets/img/avatar_default.png)
This patch adds dynamic LRO diable support for mlx4 net driver. It also fixes a bug of mlx4, which checks NETIF_F_LRO flag in rx path without rtnl lock. (I don't have mlx4 card, so only did compiling test. Anyone who wants to test this is more than welcome.) This is based on Neil's initial work too, and heavily modified based on Stanislaw's suggestions. Signed-off-by: WANG Cong <amwang@redhat.com> Signed-off-by: Neil Horman <nhorman@redhat.com> Acked-by: Neil Horman <nhorman@redhat.com> Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
461 lines
13 KiB
C
461 lines
13 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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*/
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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 "mlx4_en.h"
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#include "en_port.h"
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static void mlx4_en_update_lro_stats(struct mlx4_en_priv *priv)
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{
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int i;
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priv->port_stats.lro_aggregated = 0;
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priv->port_stats.lro_flushed = 0;
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priv->port_stats.lro_no_desc = 0;
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for (i = 0; i < priv->rx_ring_num; i++) {
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priv->port_stats.lro_aggregated += priv->rx_ring[i].lro.stats.aggregated;
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priv->port_stats.lro_flushed += priv->rx_ring[i].lro.stats.flushed;
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priv->port_stats.lro_no_desc += priv->rx_ring[i].lro.stats.no_desc;
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}
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}
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static void
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mlx4_en_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_dev *mdev = priv->mdev;
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sprintf(drvinfo->driver, DRV_NAME " (%s)", mdev->dev->board_id);
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strncpy(drvinfo->version, DRV_VERSION " (" DRV_RELDATE ")", 32);
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sprintf(drvinfo->fw_version, "%d.%d.%d",
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(u16) (mdev->dev->caps.fw_ver >> 32),
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(u16) ((mdev->dev->caps.fw_ver >> 16) & 0xffff),
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(u16) (mdev->dev->caps.fw_ver & 0xffff));
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strncpy(drvinfo->bus_info, pci_name(mdev->dev->pdev), 32);
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drvinfo->n_stats = 0;
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drvinfo->regdump_len = 0;
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drvinfo->eedump_len = 0;
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}
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static u32 mlx4_en_get_tso(struct net_device *dev)
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{
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return (dev->features & NETIF_F_TSO) != 0;
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}
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static int mlx4_en_set_tso(struct net_device *dev, u32 data)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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if (data) {
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if (!priv->mdev->LSO_support)
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return -EPERM;
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dev->features |= (NETIF_F_TSO | NETIF_F_TSO6);
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} else
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dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
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return 0;
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}
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static u32 mlx4_en_get_rx_csum(struct net_device *dev)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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return priv->rx_csum;
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}
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static int mlx4_en_set_rx_csum(struct net_device *dev, u32 data)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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priv->rx_csum = (data != 0);
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return 0;
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}
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static const char main_strings[][ETH_GSTRING_LEN] = {
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"rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
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"tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
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"rx_length_errors", "rx_over_errors", "rx_crc_errors",
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"rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
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"tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
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"tx_heartbeat_errors", "tx_window_errors",
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/* port statistics */
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"lro_aggregated", "lro_flushed", "lro_no_desc", "tso_packets",
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"queue_stopped", "wake_queue", "tx_timeout", "rx_alloc_failed",
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"rx_csum_good", "rx_csum_none", "tx_chksum_offload",
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/* packet statistics */
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"broadcast", "rx_prio_0", "rx_prio_1", "rx_prio_2", "rx_prio_3",
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"rx_prio_4", "rx_prio_5", "rx_prio_6", "rx_prio_7", "tx_prio_0",
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"tx_prio_1", "tx_prio_2", "tx_prio_3", "tx_prio_4", "tx_prio_5",
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"tx_prio_6", "tx_prio_7",
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};
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#define NUM_MAIN_STATS 21
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#define NUM_ALL_STATS (NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PKT_STATS + NUM_PERF_STATS)
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static u32 mlx4_en_get_msglevel(struct net_device *dev)
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{
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return ((struct mlx4_en_priv *) netdev_priv(dev))->msg_enable;
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}
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static void mlx4_en_set_msglevel(struct net_device *dev, u32 val)
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{
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((struct mlx4_en_priv *) netdev_priv(dev))->msg_enable = val;
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}
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static void mlx4_en_get_wol(struct net_device *netdev,
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struct ethtool_wolinfo *wol)
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{
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wol->supported = 0;
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wol->wolopts = 0;
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}
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static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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if (sset != ETH_SS_STATS)
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return -EOPNOTSUPP;
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return NUM_ALL_STATS + (priv->tx_ring_num + priv->rx_ring_num) * 2;
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}
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static void mlx4_en_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 mlx4_en_priv *priv = netdev_priv(dev);
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int index = 0;
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int i;
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spin_lock_bh(&priv->stats_lock);
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mlx4_en_update_lro_stats(priv);
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for (i = 0; i < NUM_MAIN_STATS; i++)
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data[index++] = ((unsigned long *) &priv->stats)[i];
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for (i = 0; i < NUM_PORT_STATS; i++)
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data[index++] = ((unsigned long *) &priv->port_stats)[i];
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for (i = 0; i < priv->tx_ring_num; i++) {
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data[index++] = priv->tx_ring[i].packets;
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data[index++] = priv->tx_ring[i].bytes;
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}
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for (i = 0; i < priv->rx_ring_num; i++) {
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data[index++] = priv->rx_ring[i].packets;
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data[index++] = priv->rx_ring[i].bytes;
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}
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for (i = 0; i < NUM_PKT_STATS; i++)
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data[index++] = ((unsigned long *) &priv->pkstats)[i];
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spin_unlock_bh(&priv->stats_lock);
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}
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static void mlx4_en_get_strings(struct net_device *dev,
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uint32_t stringset, uint8_t *data)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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int index = 0;
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int i;
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if (stringset != ETH_SS_STATS)
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return;
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/* Add main counters */
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for (i = 0; i < NUM_MAIN_STATS; i++)
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strcpy(data + (index++) * ETH_GSTRING_LEN, main_strings[i]);
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for (i = 0; i < NUM_PORT_STATS; i++)
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strcpy(data + (index++) * ETH_GSTRING_LEN,
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main_strings[i + NUM_MAIN_STATS]);
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for (i = 0; i < priv->tx_ring_num; i++) {
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sprintf(data + (index++) * ETH_GSTRING_LEN,
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"tx%d_packets", i);
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sprintf(data + (index++) * ETH_GSTRING_LEN,
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"tx%d_bytes", i);
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}
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for (i = 0; i < priv->rx_ring_num; i++) {
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sprintf(data + (index++) * ETH_GSTRING_LEN,
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"rx%d_packets", i);
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sprintf(data + (index++) * ETH_GSTRING_LEN,
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"rx%d_bytes", i);
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}
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for (i = 0; i < NUM_PKT_STATS; i++)
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strcpy(data + (index++) * ETH_GSTRING_LEN,
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main_strings[i + NUM_MAIN_STATS + NUM_PORT_STATS]);
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}
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static int mlx4_en_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
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{
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cmd->autoneg = AUTONEG_DISABLE;
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cmd->supported = SUPPORTED_10000baseT_Full;
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cmd->advertising = ADVERTISED_1000baseT_Full;
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if (netif_carrier_ok(dev)) {
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cmd->speed = SPEED_10000;
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cmd->duplex = DUPLEX_FULL;
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} else {
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cmd->speed = -1;
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cmd->duplex = -1;
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}
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return 0;
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}
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static int mlx4_en_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
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{
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if ((cmd->autoneg == AUTONEG_ENABLE) ||
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(cmd->speed != SPEED_10000) || (cmd->duplex != DUPLEX_FULL))
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return -EINVAL;
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/* Nothing to change */
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return 0;
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}
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static int mlx4_en_get_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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coal->tx_coalesce_usecs = 0;
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coal->tx_max_coalesced_frames = 0;
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coal->rx_coalesce_usecs = priv->rx_usecs;
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coal->rx_max_coalesced_frames = priv->rx_frames;
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coal->pkt_rate_low = priv->pkt_rate_low;
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coal->rx_coalesce_usecs_low = priv->rx_usecs_low;
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coal->pkt_rate_high = priv->pkt_rate_high;
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coal->rx_coalesce_usecs_high = priv->rx_usecs_high;
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coal->rate_sample_interval = priv->sample_interval;
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coal->use_adaptive_rx_coalesce = priv->adaptive_rx_coal;
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return 0;
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}
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static int mlx4_en_set_coalesce(struct net_device *dev,
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struct ethtool_coalesce *coal)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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int err, i;
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priv->rx_frames = (coal->rx_max_coalesced_frames ==
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MLX4_EN_AUTO_CONF) ?
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MLX4_EN_RX_COAL_TARGET :
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coal->rx_max_coalesced_frames;
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priv->rx_usecs = (coal->rx_coalesce_usecs ==
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MLX4_EN_AUTO_CONF) ?
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MLX4_EN_RX_COAL_TIME :
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coal->rx_coalesce_usecs;
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/* Set adaptive coalescing params */
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priv->pkt_rate_low = coal->pkt_rate_low;
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priv->rx_usecs_low = coal->rx_coalesce_usecs_low;
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priv->pkt_rate_high = coal->pkt_rate_high;
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priv->rx_usecs_high = coal->rx_coalesce_usecs_high;
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priv->sample_interval = coal->rate_sample_interval;
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priv->adaptive_rx_coal = coal->use_adaptive_rx_coalesce;
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priv->last_moder_time = MLX4_EN_AUTO_CONF;
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if (priv->adaptive_rx_coal)
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return 0;
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for (i = 0; i < priv->rx_ring_num; i++) {
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priv->rx_cq[i].moder_cnt = priv->rx_frames;
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priv->rx_cq[i].moder_time = priv->rx_usecs;
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err = mlx4_en_set_cq_moder(priv, &priv->rx_cq[i]);
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if (err)
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return err;
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}
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return 0;
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}
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static int mlx4_en_set_pauseparam(struct net_device *dev,
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struct ethtool_pauseparam *pause)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_dev *mdev = priv->mdev;
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int err;
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priv->prof->tx_pause = pause->tx_pause != 0;
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priv->prof->rx_pause = pause->rx_pause != 0;
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err = mlx4_SET_PORT_general(mdev->dev, priv->port,
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priv->rx_skb_size + ETH_FCS_LEN,
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priv->prof->tx_pause,
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priv->prof->tx_ppp,
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priv->prof->rx_pause,
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priv->prof->rx_ppp);
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if (err)
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en_err(priv, "Failed setting pause params\n");
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return err;
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}
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static void mlx4_en_get_pauseparam(struct net_device *dev,
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struct ethtool_pauseparam *pause)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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pause->tx_pause = priv->prof->tx_pause;
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pause->rx_pause = priv->prof->rx_pause;
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}
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static int mlx4_en_set_ringparam(struct net_device *dev,
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struct ethtool_ringparam *param)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_dev *mdev = priv->mdev;
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u32 rx_size, tx_size;
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int port_up = 0;
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int err = 0;
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if (param->rx_jumbo_pending || param->rx_mini_pending)
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return -EINVAL;
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rx_size = roundup_pow_of_two(param->rx_pending);
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rx_size = max_t(u32, rx_size, MLX4_EN_MIN_RX_SIZE);
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rx_size = min_t(u32, rx_size, MLX4_EN_MAX_RX_SIZE);
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tx_size = roundup_pow_of_two(param->tx_pending);
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tx_size = max_t(u32, tx_size, MLX4_EN_MIN_TX_SIZE);
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tx_size = min_t(u32, tx_size, MLX4_EN_MAX_TX_SIZE);
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if (rx_size == priv->prof->rx_ring_size &&
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tx_size == priv->prof->tx_ring_size)
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return 0;
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mutex_lock(&mdev->state_lock);
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if (priv->port_up) {
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port_up = 1;
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mlx4_en_stop_port(dev);
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}
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mlx4_en_free_resources(priv);
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priv->prof->tx_ring_size = tx_size;
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priv->prof->rx_ring_size = rx_size;
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err = mlx4_en_alloc_resources(priv);
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if (err) {
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en_err(priv, "Failed reallocating port resources\n");
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goto out;
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}
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if (port_up) {
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err = mlx4_en_start_port(dev);
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if (err)
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en_err(priv, "Failed starting port\n");
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}
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out:
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mutex_unlock(&mdev->state_lock);
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return err;
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}
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static void mlx4_en_get_ringparam(struct net_device *dev,
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struct ethtool_ringparam *param)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_dev *mdev = priv->mdev;
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memset(param, 0, sizeof(*param));
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param->rx_max_pending = MLX4_EN_MAX_RX_SIZE;
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param->tx_max_pending = MLX4_EN_MAX_TX_SIZE;
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param->rx_pending = mdev->profile.prof[priv->port].rx_ring_size;
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param->tx_pending = mdev->profile.prof[priv->port].tx_ring_size;
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}
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static int mlx4_ethtool_op_set_flags(struct net_device *dev, u32 data)
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{
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struct mlx4_en_priv *priv = netdev_priv(dev);
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struct mlx4_en_dev *mdev = priv->mdev;
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int rc = 0;
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int changed = 0;
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if (data & ~ETH_FLAG_LRO)
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return -EOPNOTSUPP;
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if (data & ETH_FLAG_LRO) {
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if (mdev->profile.num_lro == 0)
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return -EOPNOTSUPP;
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if (!(dev->features & NETIF_F_LRO))
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changed = 1;
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} else if (dev->features & NETIF_F_LRO) {
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changed = 1;
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}
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if (changed) {
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if (netif_running(dev)) {
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mutex_lock(&mdev->state_lock);
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mlx4_en_stop_port(dev);
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}
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dev->features ^= NETIF_F_LRO;
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if (netif_running(dev)) {
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rc = mlx4_en_start_port(dev);
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if (rc)
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en_err(priv, "Failed to restart port\n");
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mutex_unlock(&mdev->state_lock);
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}
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}
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return rc;
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}
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const struct ethtool_ops mlx4_en_ethtool_ops = {
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.get_drvinfo = mlx4_en_get_drvinfo,
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.get_settings = mlx4_en_get_settings,
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.set_settings = mlx4_en_set_settings,
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#ifdef NETIF_F_TSO
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.get_tso = mlx4_en_get_tso,
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.set_tso = mlx4_en_set_tso,
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#endif
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.get_sg = ethtool_op_get_sg,
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.set_sg = ethtool_op_set_sg,
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.get_link = ethtool_op_get_link,
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.get_rx_csum = mlx4_en_get_rx_csum,
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.set_rx_csum = mlx4_en_set_rx_csum,
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.get_tx_csum = ethtool_op_get_tx_csum,
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.set_tx_csum = ethtool_op_set_tx_ipv6_csum,
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.get_strings = mlx4_en_get_strings,
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.get_sset_count = mlx4_en_get_sset_count,
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.get_ethtool_stats = mlx4_en_get_ethtool_stats,
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.get_wol = mlx4_en_get_wol,
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.get_msglevel = mlx4_en_get_msglevel,
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.set_msglevel = mlx4_en_set_msglevel,
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.get_coalesce = mlx4_en_get_coalesce,
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.set_coalesce = mlx4_en_set_coalesce,
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.get_pauseparam = mlx4_en_get_pauseparam,
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.set_pauseparam = mlx4_en_set_pauseparam,
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.get_ringparam = mlx4_en_get_ringparam,
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.set_ringparam = mlx4_en_set_ringparam,
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.get_flags = ethtool_op_get_flags,
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.set_flags = mlx4_ethtool_op_set_flags,
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};
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