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 static void ipoib_get_drvinfo(struct ifnet *netdev, 40 struct ethtool_drvinfo *drvinfo) 41 { 42 strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1); 43 } 44 45 static u32 ipoib_get_rx_csum(struct ifnet *dev) 46 { 47 struct ipoib_dev_priv *priv = dev->if_softc; 48 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) && 49 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 50 } 51 52 static int ipoib_get_coalesce(struct ifnet *dev, 53 struct ethtool_coalesce *coal) 54 { 55 struct ipoib_dev_priv *priv = dev->if_softc; 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 65 static int ipoib_set_coalesce(struct ifnet *dev, 66 struct ethtool_coalesce *coal) 67 { 68 struct ipoib_dev_priv *priv = dev->if_softc; 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 if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) { 82 if (!coal->rx_max_coalesced_frames) 83 coal->rx_max_coalesced_frames = 0xffff; 84 else if (!coal->rx_coalesce_usecs) 85 coal->rx_coalesce_usecs = 0xffff; 86 } 87 88 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames, 89 coal->rx_coalesce_usecs); 90 if (ret && ret != -ENOSYS) { 91 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret); 92 return ret; 93 } 94 95 coal->tx_coalesce_usecs = coal->rx_coalesce_usecs; 96 coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames; 97 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs; 98 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames; 99 100 return 0; 101 } 102 103 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = { 104 "LRO aggregated", "LRO flushed", 105 "LRO avg aggr", "LRO no desc" 106 }; 107 108 static void ipoib_get_strings(struct ifnet *netdev, u32 stringset, u8 *data) 109 { 110 switch (stringset) { 111 case ETH_SS_STATS: 112 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys)); 113 break; 114 } 115 } 116 117 static int ipoib_get_sset_count(struct ifnet *dev, int sset) 118 { 119 switch (sset) { 120 case ETH_SS_STATS: 121 return ARRAY_SIZE(ipoib_stats_keys); 122 default: 123 return -EOPNOTSUPP; 124 } 125 } 126 127 static void ipoib_get_ethtool_stats(struct ifnet *dev, 128 struct ethtool_stats *stats, uint64_t *data) 129 { 130 struct ipoib_dev_priv *priv = dev->if_softc; 131 int index = 0; 132 133 /* Get LRO statistics */ 134 data[index++] = priv->lro.lro_mgr.stats.aggregated; 135 data[index++] = priv->lro.lro_mgr.stats.flushed; 136 if (priv->lro.lro_mgr.stats.flushed) 137 data[index++] = priv->lro.lro_mgr.stats.aggregated / 138 priv->lro.lro_mgr.stats.flushed; 139 else 140 data[index++] = 0; 141 data[index++] = priv->lro.lro_mgr.stats.no_desc; 142 } 143 144 static const struct ethtool_ops ipoib_ethtool_ops = { 145 .get_drvinfo = ipoib_get_drvinfo, 146 .get_rx_csum = ipoib_get_rx_csum, 147 .get_coalesce = ipoib_get_coalesce, 148 .set_coalesce = ipoib_set_coalesce, 149 .get_flags = ethtool_op_get_flags, 150 .set_flags = ethtool_op_set_flags, 151 .get_strings = ipoib_get_strings, 152 .get_sset_count = ipoib_get_sset_count, 153 .get_ethtool_stats = ipoib_get_ethtool_stats, 154 }; 155 156 void ipoib_set_ethtool_ops(struct ifnet *dev) 157 { 158 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops); 159 } 160