From patchwork Fri Dec 12 05:31:56 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herbert Xu X-Patchwork-Id: 13666 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by ozlabs.org (Postfix) with ESMTP id E6CB0DDFA9 for ; Fri, 12 Dec 2008 16:32:24 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758097AbYLLFcO (ORCPT ); Fri, 12 Dec 2008 00:32:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757049AbYLLFcM (ORCPT ); Fri, 12 Dec 2008 00:32:12 -0500 Received: from rhun.apana.org.au ([64.62.148.172]:59010 "EHLO arnor.apana.org.au" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757960AbYLLFcA (ORCPT ); Fri, 12 Dec 2008 00:32:00 -0500 Received: from gondolin.me.apana.org.au ([192.168.0.6]) by arnor.apana.org.au with esmtp (Exim 4.63 #1 (Debian)) id 1LB0d2-0000x5-Rb; Fri, 12 Dec 2008 16:31:58 +1100 Received: from herbert by gondolin.me.apana.org.au with local (Exim 4.69) (envelope-from ) id 1LB0d2-0000rq-Dr; Fri, 12 Dec 2008 16:31:56 +1100 Subject: [PATCH 7/8] ethtool: Add GGRO and SGRO ops References: <20081212053116.GA2927@gondor.apana.org.au> To: "David S. Miller" , netdev@vger.kernel.org Message-Id: From: Herbert Xu Date: Fri, 12 Dec 2008 16:31:56 +1100 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ethtool: Add GGRO and SGRO ops This patch adds the ethtool ops to enable and disable GRO. It also makes GRO depend on RX checksum offload much the same as how TSO depends on SG support. Signed-off-by: Herbert Xu --- include/linux/ethtool.h | 2 + net/core/ethtool.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 53 insertions(+), 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index b4b038b..27c67a5 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -467,6 +467,8 @@ struct ethtool_ops { #define ETHTOOL_GRXFH 0x00000029 /* Get RX flow hash configuration */ #define ETHTOOL_SRXFH 0x0000002a /* Set RX flow hash configuration */ +#define ETHTOOL_GGRO 0x0000002b /* Get GRO enable (ethtool_value) */ +#define ETHTOOL_SGRO 0x0000002c /* Set GRO enable (ethtool_value) */ /* compatibility with older code */ #define SPARC_ETH_GSET ETHTOOL_GSET diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 14ada53..947710a 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -528,6 +528,22 @@ static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr) return dev->ethtool_ops->set_tx_csum(dev, edata.data); } +static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr) +{ + struct ethtool_value edata; + + if (!dev->ethtool_ops->set_rx_csum) + return -EOPNOTSUPP; + + if (copy_from_user(&edata, useraddr, sizeof(edata))) + return -EFAULT; + + if (!edata.data && dev->ethtool_ops->set_sg) + dev->features &= ~NETIF_F_GRO; + + return dev->ethtool_ops->set_rx_csum(dev, edata.data); +} + static int ethtool_set_sg(struct net_device *dev, char __user *useraddr) { struct ethtool_value edata; @@ -599,6 +615,34 @@ static int ethtool_set_gso(struct net_device *dev, char __user *useraddr) return 0; } +static int ethtool_get_gro(struct net_device *dev, char __user *useraddr) +{ + struct ethtool_value edata = { ETHTOOL_GGRO }; + + edata.data = dev->features & NETIF_F_GRO; + if (copy_to_user(useraddr, &edata, sizeof(edata))) + return -EFAULT; + return 0; +} + +static int ethtool_set_gro(struct net_device *dev, char __user *useraddr) +{ + struct ethtool_value edata; + + if (copy_from_user(&edata, useraddr, sizeof(edata))) + return -EFAULT; + + if (edata.data) { + if (!dev->ethtool_ops->get_rx_csum || + !dev->ethtool_ops->get_rx_csum(dev)) + return -EINVAL; + dev->features |= NETIF_F_GRO; + } else + dev->features &= ~NETIF_F_GRO; + + return 0; +} + static int ethtool_self_test(struct net_device *dev, char __user *useraddr) { struct ethtool_test test; @@ -932,8 +976,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr) dev->ethtool_ops->get_rx_csum); break; case ETHTOOL_SRXCSUM: - rc = ethtool_set_value(dev, useraddr, - dev->ethtool_ops->set_rx_csum); + rc = ethtool_set_rx_csum(dev, useraddr); break; case ETHTOOL_GTXCSUM: rc = ethtool_get_value(dev, useraddr, ethcmd, @@ -1014,6 +1057,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr) case ETHTOOL_SRXFH: rc = ethtool_set_rxhash(dev, useraddr); break; + case ETHTOOL_GGRO: + rc = ethtool_get_gro(dev, useraddr); + break; + case ETHTOOL_SGRO: + rc = ethtool_set_gro(dev, useraddr); + break; default: rc = -EOPNOTSUPP; }