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/netdevice.h> 35 36 #include "ipoib.h" 37 38 static void ipoib_get_drvinfo(struct ifnet *netdev, 39 struct ethtool_drvinfo *drvinfo) 40 { 41 strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1); 42 } 43 44 static u32 ipoib_get_rx_csum(struct ifnet *dev) 45 { 46 struct ipoib_dev_priv *priv = dev->if_softc; 47 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) && 48 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 49 } 50 51 static int ipoib_get_coalesce(struct ifnet *dev, 52 struct ethtool_coalesce *coal) 53 { 54 struct ipoib_dev_priv *priv = dev->if_softc; 55 56 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs; 57 coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs; 58 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 59 coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 60 61 return 0; 62 } 63 64 static int ipoib_set_coalesce(struct ifnet *dev, 65 struct ethtool_coalesce *coal) 66 { 67 struct ipoib_dev_priv *priv = dev->if_softc; 68 int ret; 69 70 /* 71 * Since IPoIB uses a single CQ for both rx and tx, we assume 72 * that rx params dictate the configuration. These values are 73 * saved in the private data and returned when ipoib_get_coalesce() 74 * is called. 75 */ 76 if (coal->rx_coalesce_usecs > 0xffff || 77 coal->rx_max_coalesced_frames > 0xffff) 78 return -EINVAL; 79 80 if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) { 81 if (!coal->rx_max_coalesced_frames) 82 coal->rx_max_coalesced_frames = 0xffff; 83 else if (!coal->rx_coalesce_usecs) 84 coal->rx_coalesce_usecs = 0xffff; 85 } 86 87 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames, 88 coal->rx_coalesce_usecs); 89 if (ret && ret != -ENOSYS) { 90 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret); 91 return ret; 92 } 93 94 coal->tx_coalesce_usecs = coal->rx_coalesce_usecs; 95 coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames; 96 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs; 97 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames; 98 99 return 0; 100 } 101 102 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = { 103 "LRO aggregated", "LRO flushed", 104 "LRO avg aggr", "LRO no desc" 105 }; 106 107 static void ipoib_get_strings(struct ifnet *netdev, u32 stringset, u8 *data) 108 { 109 switch (stringset) { 110 case ETH_SS_STATS: 111 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys)); 112 break; 113 } 114 } 115 116 static int ipoib_get_sset_count(struct ifnet *dev, int sset) 117 { 118 switch (sset) { 119 case ETH_SS_STATS: 120 return ARRAY_SIZE(ipoib_stats_keys); 121 default: 122 return -EOPNOTSUPP; 123 } 124 } 125 126 static void ipoib_get_ethtool_stats(struct ifnet *dev, 127 struct ethtool_stats *stats, uint64_t *data) 128 { 129 struct ipoib_dev_priv *priv = dev->if_softc; 130 int index = 0; 131 132 /* Get LRO statistics */ 133 data[index++] = priv->lro.lro_mgr.stats.aggregated; 134 data[index++] = priv->lro.lro_mgr.stats.flushed; 135 if (priv->lro.lro_mgr.stats.flushed) 136 data[index++] = priv->lro.lro_mgr.stats.aggregated / 137 priv->lro.lro_mgr.stats.flushed; 138 else 139 data[index++] = 0; 140 data[index++] = priv->lro.lro_mgr.stats.no_desc; 141 } 142 143 static const struct ethtool_ops ipoib_ethtool_ops = { 144 .get_drvinfo = ipoib_get_drvinfo, 145 .get_rx_csum = ipoib_get_rx_csum, 146 .get_coalesce = ipoib_get_coalesce, 147 .set_coalesce = ipoib_set_coalesce, 148 .get_flags = ethtool_op_get_flags, 149 .set_flags = ethtool_op_set_flags, 150 .get_strings = ipoib_get_strings, 151 .get_sset_count = ipoib_get_sset_count, 152 .get_ethtool_stats = ipoib_get_ethtool_stats, 153 }; 154 155 void ipoib_set_ethtool_ops(struct ifnet *dev) 156 { 157 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops); 158 } 159