1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2007 Mellanox Technologies. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <linux/kernel.h> 36 #include <linux/netdevice.h> 37 38 #include "ipoib.h" 39 40 static void ipoib_get_drvinfo(struct ifnet *netdev, 41 struct ethtool_drvinfo *drvinfo) 42 { 43 strncpy(drvinfo->driver, "ipoib", sizeof(drvinfo->driver) - 1); 44 } 45 46 static u32 ipoib_get_rx_csum(struct ifnet *dev) 47 { 48 struct ipoib_dev_priv *priv = dev->if_softc; 49 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) && 50 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 51 } 52 53 static int ipoib_get_coalesce(struct ifnet *dev, 54 struct ethtool_coalesce *coal) 55 { 56 struct ipoib_dev_priv *priv = dev->if_softc; 57 58 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs; 59 coal->tx_coalesce_usecs = priv->ethtool.coalesce_usecs; 60 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 61 coal->tx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 62 63 return 0; 64 } 65 66 static int ipoib_set_coalesce(struct ifnet *dev, 67 struct ethtool_coalesce *coal) 68 { 69 struct ipoib_dev_priv *priv = dev->if_softc; 70 int ret; 71 72 /* 73 * Since IPoIB uses a single CQ for both rx and tx, we assume 74 * that rx params dictate the configuration. These values are 75 * saved in the private data and returned when ipoib_get_coalesce() 76 * is called. 77 */ 78 if (coal->rx_coalesce_usecs > 0xffff || 79 coal->rx_max_coalesced_frames > 0xffff) 80 return -EINVAL; 81 82 if (coal->rx_max_coalesced_frames | coal->rx_coalesce_usecs) { 83 if (!coal->rx_max_coalesced_frames) 84 coal->rx_max_coalesced_frames = 0xffff; 85 else if (!coal->rx_coalesce_usecs) 86 coal->rx_coalesce_usecs = 0xffff; 87 } 88 89 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames, 90 coal->rx_coalesce_usecs); 91 if (ret && ret != -ENOSYS) { 92 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret); 93 return ret; 94 } 95 96 coal->tx_coalesce_usecs = coal->rx_coalesce_usecs; 97 coal->tx_max_coalesced_frames = coal->rx_max_coalesced_frames; 98 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs; 99 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames; 100 101 return 0; 102 } 103 104 static const char ipoib_stats_keys[][ETH_GSTRING_LEN] = { 105 "LRO aggregated", "LRO flushed", 106 "LRO avg aggr", "LRO no desc" 107 }; 108 109 static void ipoib_get_strings(struct ifnet *netdev, u32 stringset, u8 *data) 110 { 111 switch (stringset) { 112 case ETH_SS_STATS: 113 memcpy(data, *ipoib_stats_keys, sizeof(ipoib_stats_keys)); 114 break; 115 } 116 } 117 118 static int ipoib_get_sset_count(struct ifnet *dev, int sset) 119 { 120 switch (sset) { 121 case ETH_SS_STATS: 122 return ARRAY_SIZE(ipoib_stats_keys); 123 default: 124 return -EOPNOTSUPP; 125 } 126 } 127 128 static void ipoib_get_ethtool_stats(struct ifnet *dev, 129 struct ethtool_stats *stats, uint64_t *data) 130 { 131 struct ipoib_dev_priv *priv = dev->if_softc; 132 int index = 0; 133 134 /* Get LRO statistics */ 135 data[index++] = priv->lro.lro_mgr.stats.aggregated; 136 data[index++] = priv->lro.lro_mgr.stats.flushed; 137 if (priv->lro.lro_mgr.stats.flushed) 138 data[index++] = priv->lro.lro_mgr.stats.aggregated / 139 priv->lro.lro_mgr.stats.flushed; 140 else 141 data[index++] = 0; 142 data[index++] = priv->lro.lro_mgr.stats.no_desc; 143 } 144 145 static const struct ethtool_ops ipoib_ethtool_ops = { 146 .get_drvinfo = ipoib_get_drvinfo, 147 .get_rx_csum = ipoib_get_rx_csum, 148 .get_coalesce = ipoib_get_coalesce, 149 .set_coalesce = ipoib_set_coalesce, 150 .get_flags = ethtool_op_get_flags, 151 .set_flags = ethtool_op_set_flags, 152 .get_strings = ipoib_get_strings, 153 .get_sset_count = ipoib_get_sset_count, 154 .get_ethtool_stats = ipoib_get_ethtool_stats, 155 }; 156 157 void ipoib_set_ethtool_ops(struct ifnet *dev) 158 { 159 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops); 160 } 161