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 struct 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 48 static 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 61 static 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 74 static 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 87 static 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 returned 97 * when ipoib_get_coalesce() is called 98 */ 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 } 116 static 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 } 128 static 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 } 146 static 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 */ 159 static 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 } 183 184 static 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 of 208 * the struct ethtool_link_settings are initialized to 209 * 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 } 221 222 static 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 }; 234 235 void ipoib_set_ethtool_ops(struct net_device *dev) 236 { 237 dev->ethtool_ops = &ipoib_ethtool_ops; 238 } 239