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 net_device *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 net_device *dev) 46 { 47 struct ipoib_dev_priv *priv = netdev_priv(dev); 48 return test_bit(IPOIB_FLAG_CSUM, &priv->flags) && 49 !test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags); 50 } 51 52 static int ipoib_set_tso(struct net_device *dev, u32 data) 53 { 54 struct ipoib_dev_priv *priv = netdev_priv(dev); 55 56 if (data) { 57 if (!test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags) && 58 (dev->features & NETIF_F_SG) && 59 (priv->hca_caps & IB_DEVICE_UD_TSO)) { 60 dev->features |= NETIF_F_TSO; 61 } else { 62 ipoib_warn(priv, "can't set TSO on\n"); 63 return -EOPNOTSUPP; 64 } 65 } else 66 dev->features &= ~NETIF_F_TSO; 67 68 return 0; 69 } 70 71 static int ipoib_get_coalesce(struct net_device *dev, 72 struct ethtool_coalesce *coal) 73 { 74 struct ipoib_dev_priv *priv = netdev_priv(dev); 75 76 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs; 77 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 78 79 return 0; 80 } 81 82 static int ipoib_set_coalesce(struct net_device *dev, 83 struct ethtool_coalesce *coal) 84 { 85 struct ipoib_dev_priv *priv = netdev_priv(dev); 86 int ret; 87 88 /* 89 * These values are saved in the private data and returned 90 * when ipoib_get_coalesce() is called 91 */ 92 if (coal->rx_coalesce_usecs > 0xffff || 93 coal->rx_max_coalesced_frames > 0xffff) 94 return -EINVAL; 95 96 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames, 97 coal->rx_coalesce_usecs); 98 if (ret && ret != -ENOSYS) { 99 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret); 100 return ret; 101 } 102 103 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs; 104 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames; 105 106 return 0; 107 } 108 109 static const struct ethtool_ops ipoib_ethtool_ops = { 110 .get_drvinfo = ipoib_get_drvinfo, 111 .get_rx_csum = ipoib_get_rx_csum, 112 .set_tso = ipoib_set_tso, 113 .get_coalesce = ipoib_get_coalesce, 114 .set_coalesce = ipoib_set_coalesce, 115 }; 116 117 void ipoib_set_ethtool_ops(struct net_device *dev) 118 { 119 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops); 120 } 121