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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Jamal Hadi Salim , Cong Wang , Jiri Pirko , Vinicius Costa Gomes , Kurt Kanzenbach , Gerhard Engleder , Amritha Nambiar , Ferenc Fejes , Xiaoliang Yang , Roger Quadros , Pranavi Somisetty , Harini Katakam , Giuseppe Cavallaro , Alexandre Torgue , Michael Sit Wei Hong , Mohammad Athari Bin Ismail , Oleksij Rempel , Jacob Keller , linux-kernel@vger.kernel.org, Ferenc Fejes , Simon Horman Subject: [PATCH v5 net-next 1/9] net: ethtool: create and export ethtool_dev_mm_supported() Date: Tue, 11 Apr 2023 21:01:49 +0300 Message-Id: <20230411180157.1850527-2-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230411180157.1850527-1-vladimir.oltean@nxp.com> References: <20230411180157.1850527-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: FR2P281CA0186.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:9f::20) To AM0PR04MB6452.eurprd04.prod.outlook.com (2603:10a6:208:16d::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM0PR04MB6452:EE_|AS8PR04MB7829:EE_ X-MS-Office365-Filtering-Correlation-Id: 10fa4c78-6e62-4990-3aaa-08db3ab6e5f3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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It can be used by other code layers, such as tc, to make sure that preemptible TCs are supported (this is true if an underlying MAC Merge layer exists). Signed-off-by: Vladimir Oltean Reviewed-by: Ferenc Fejes Reviewed-by: Simon Horman --- v2->v5: none v1->v2: - don't touch net/sched/sch_mqprio.c in this patch - add missing EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported) include/linux/ethtool_netlink.h | 6 ++++++ net/ethtool/mm.c | 23 +++++++++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h index 17003b385756..fae0dfb9a9c8 100644 --- a/include/linux/ethtool_netlink.h +++ b/include/linux/ethtool_netlink.h @@ -39,6 +39,7 @@ void ethtool_aggregate_pause_stats(struct net_device *dev, struct ethtool_pause_stats *pause_stats); void ethtool_aggregate_rmon_stats(struct net_device *dev, struct ethtool_rmon_stats *rmon_stats); +bool ethtool_dev_mm_supported(struct net_device *dev); #else static inline int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd) @@ -112,5 +113,10 @@ ethtool_aggregate_rmon_stats(struct net_device *dev, { } +static inline bool ethtool_dev_mm_supported(struct net_device *dev) +{ + return false; +} + #endif /* IS_ENABLED(CONFIG_ETHTOOL_NETLINK) */ #endif /* _LINUX_ETHTOOL_NETLINK_H_ */ diff --git a/net/ethtool/mm.c b/net/ethtool/mm.c index fce3cc2734f9..e00d7d5cea7e 100644 --- a/net/ethtool/mm.c +++ b/net/ethtool/mm.c @@ -249,3 +249,26 @@ bool __ethtool_dev_mm_supported(struct net_device *dev) return !ret; } + +bool ethtool_dev_mm_supported(struct net_device *dev) +{ + const struct ethtool_ops *ops = dev->ethtool_ops; + bool supported; + int ret; + + ASSERT_RTNL(); + + if (!ops) + return false; + + ret = ethnl_ops_begin(dev); + if (ret < 0) + return false; + + supported = __ethtool_dev_mm_supported(dev); + + ethnl_ops_complete(dev); + + return supported; +} +EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported);