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 int ipoib_get_coalesce(struct net_device *dev, 46 struct ethtool_coalesce *coal) 47 { 48 struct ipoib_dev_priv *priv = netdev_priv(dev); 49 50 coal->rx_coalesce_usecs = priv->ethtool.coalesce_usecs; 51 coal->rx_max_coalesced_frames = priv->ethtool.max_coalesced_frames; 52 53 return 0; 54 } 55 56 static int ipoib_set_coalesce(struct net_device *dev, 57 struct ethtool_coalesce *coal) 58 { 59 struct ipoib_dev_priv *priv = netdev_priv(dev); 60 int ret; 61 62 /* 63 * These values are saved in the private data and returned 64 * when ipoib_get_coalesce() is called 65 */ 66 if (coal->rx_coalesce_usecs > 0xffff || 67 coal->rx_max_coalesced_frames > 0xffff) 68 return -EINVAL; 69 70 ret = ib_modify_cq(priv->recv_cq, coal->rx_max_coalesced_frames, 71 coal->rx_coalesce_usecs); 72 if (ret && ret != -ENOSYS) { 73 ipoib_warn(priv, "failed modifying CQ (%d)\n", ret); 74 return ret; 75 } 76 77 priv->ethtool.coalesce_usecs = coal->rx_coalesce_usecs; 78 priv->ethtool.max_coalesced_frames = coal->rx_max_coalesced_frames; 79 80 return 0; 81 } 82 83 static const struct ethtool_ops ipoib_ethtool_ops = { 84 .get_drvinfo = ipoib_get_drvinfo, 85 .get_coalesce = ipoib_get_coalesce, 86 .set_coalesce = ipoib_set_coalesce, 87 }; 88 89 void ipoib_set_ethtool_ops(struct net_device *dev) 90 { 91 SET_ETHTOOL_OPS(dev, &ipoib_ethtool_ops); 92 } 93