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1/*2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * SOFTWARE.31 */32 33#include <linux/kernel.h>34#include <linux/ethtool.h>35#include <linux/netdevice.h>36 37#include "ipoib.h"38 39struct ipoib_stats {40 char stat_string[ETH_GSTRING_LEN];41 int stat_offset;42};43 44#define IPOIB_NETDEV_STAT(m) { \45 .stat_string = #m, \46 .stat_offset = offsetof(struct rtnl_link_stats64, m) }47 48static const struct ipoib_stats ipoib_gstrings_stats[] = {49 IPOIB_NETDEV_STAT(rx_packets),50 IPOIB_NETDEV_STAT(tx_packets),51 IPOIB_NETDEV_STAT(rx_bytes),52 IPOIB_NETDEV_STAT(tx_bytes),53 IPOIB_NETDEV_STAT(tx_errors),54 IPOIB_NETDEV_STAT(rx_dropped),55 IPOIB_NETDEV_STAT(tx_dropped),56 IPOIB_NETDEV_STAT(multicast),57};58 59#define IPOIB_GLOBAL_STATS_LEN ARRAY_SIZE(ipoib_gstrings_stats)60 61static void ipoib_get_drvinfo(struct net_device *netdev,62 struct ethtool_drvinfo *drvinfo)63{64 struct ipoib_dev_priv *priv = ipoib_priv(netdev);65 66 ib_get_device_fw_str(priv->ca, drvinfo->fw_version);67 68 strscpy(drvinfo->bus_info, dev_name(priv->ca->dev.parent),69 sizeof(drvinfo->bus_info));70 71 strscpy(drvinfo->driver, "ib_ipoib", sizeof(drvinfo->driver));72}73 74static int ipoib_get_coalesce(struct net_device *dev,75 struct ethtool_coalesce *coal,76 struct kernel_ethtool_coalesce *kernel_coal,77 struct netlink_ext_ack *extack)78{79 struct ipoib_dev_priv *priv = ipoib_priv(dev);80 81 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs;82 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames;83 84 return 0;85}86 87static int ipoib_set_coalesce(struct net_device *dev,88 struct ethtool_coalesce *coal,89 struct kernel_ethtool_coalesce *kernel_coal,90 struct netlink_ext_ack *extack)91{92 struct ipoib_dev_priv *priv = ipoib_priv(dev);93 int ret;94 95 /*96 * These values are saved in the private data and returned97 * when ipoib_get_coalesce() is called98 */99 if (coal->rx_coalesce_usecs > 0xffff ||100 coal->rx_max_coalesced_frames > 0xffff)101 return -EINVAL;102 103 ret = rdma_set_cq_moderation(priv->recv_cq,104 coal->rx_max_coalesced_frames,105 coal->rx_coalesce_usecs);106 if (ret && ret != -EOPNOTSUPP) {107 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret);108 return ret;109 }110 111 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs;112 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames;113 114 return 0;115}116static void ipoib_get_ethtool_stats(struct net_device *dev,117 struct ethtool_stats __always_unused *stats,118 u64 *data)119{120 int i;121 struct net_device_stats *net_stats = &dev->stats;122 u8 *p = (u8 *)net_stats;123 124 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++)125 data[i] = *(u64 *)(p + ipoib_gstrings_stats[i].stat_offset);126 127}128static void ipoib_get_strings(struct net_device __always_unused *dev,129 u32 stringset, u8 *data)130{131 u8 *p = data;132 int i;133 134 switch (stringset) {135 case ETH_SS_STATS:136 for (i = 0; i < IPOIB_GLOBAL_STATS_LEN; i++) {137 memcpy(p, ipoib_gstrings_stats[i].stat_string,138 ETH_GSTRING_LEN);139 p += ETH_GSTRING_LEN;140 }141 break;142 default:143 break;144 }145}146static int ipoib_get_sset_count(struct net_device __always_unused *dev,147 int sset)148{149 switch (sset) {150 case ETH_SS_STATS:151 return IPOIB_GLOBAL_STATS_LEN;152 default:153 break;154 }155 return -EOPNOTSUPP;156}157 158/* Return lane speed in unit of 1e6 bit/sec */159static inline int ib_speed_enum_to_int(int speed)160{161 switch (speed) {162 case IB_SPEED_SDR:163 return SPEED_2500;164 case IB_SPEED_DDR:165 return SPEED_5000;166 case IB_SPEED_QDR:167 case IB_SPEED_FDR10:168 return SPEED_10000;169 case IB_SPEED_FDR:170 return SPEED_14000;171 case IB_SPEED_EDR:172 return SPEED_25000;173 case IB_SPEED_HDR:174 return SPEED_50000;175 case IB_SPEED_NDR:176 return SPEED_100000;177 case IB_SPEED_XDR:178 return SPEED_200000;179 }180 181 return SPEED_UNKNOWN;182}183 184static int ipoib_get_link_ksettings(struct net_device *netdev,185 struct ethtool_link_ksettings *cmd)186{187 struct ipoib_dev_priv *priv = ipoib_priv(netdev);188 struct ib_port_attr attr;189 int ret, speed, width;190 191 if (!netif_carrier_ok(netdev)) {192 cmd->base.speed = SPEED_UNKNOWN;193 cmd->base.duplex = DUPLEX_UNKNOWN;194 return 0;195 }196 197 ret = ib_query_port(priv->ca, priv->port, &attr);198 if (ret < 0)199 return -EINVAL;200 201 speed = ib_speed_enum_to_int(attr.active_speed);202 width = ib_width_enum_to_int(attr.active_width);203 204 if (speed < 0 || width < 0)205 return -EINVAL;206 207 /* Except the following are set, the other members of208 * the struct ethtool_link_settings are initialized to209 * zero in the function __ethtool_get_link_ksettings.210 */211 cmd->base.speed = speed * width;212 cmd->base.duplex = DUPLEX_FULL;213 214 cmd->base.phy_address = 0xFF;215 216 cmd->base.autoneg = AUTONEG_ENABLE;217 cmd->base.port = PORT_OTHER;218 219 return 0;220}221 222static const struct ethtool_ops ipoib_ethtool_ops = {223 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |224 ETHTOOL_COALESCE_RX_MAX_FRAMES,225 .get_link_ksettings = ipoib_get_link_ksettings,226 .get_drvinfo = ipoib_get_drvinfo,227 .get_coalesce = ipoib_get_coalesce,228 .set_coalesce = ipoib_set_coalesce,229 .get_strings = ipoib_get_strings,230 .get_ethtool_stats = ipoib_get_ethtool_stats,231 .get_sset_count = ipoib_get_sset_count,232 .get_link = ethtool_op_get_link,233};234 235void ipoib_set_ethtool_ops(struct net_device *dev)236{237 dev->ethtool_ops = &ipoib_ethtool_ops;238}239