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Mon, 19 Aug 2024 13:12:04 +0000 Date: Mon, 19 Aug 2024 15:11:56 +0200 From: Maciej Fijalkowski To: Kurt Kanzenbach CC: Tony Nguyen , Przemek Kitszel , "David S. Miller" , "Eric Dumazet" , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , "John Fastabend" , Richard Cochran , Sriram Yagnaraman , Benjamin Steinke , Sebastian Andrzej Siewior , , , , Sriram Yagnaraman Subject: Re: [PATCH iwl-next v6 3/6] igb: Introduce igb_xdp_is_enabled() Message-ID: References: <20240711-b4-igb_zero_copy-v6-0-4bfb68773b18@linutronix.de> <20240711-b4-igb_zero_copy-v6-3-4bfb68773b18@linutronix.de> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20240711-b4-igb_zero_copy-v6-3-4bfb68773b18@linutronix.de> X-ClientProxiedBy: ZR2P278CA0039.CHEP278.PROD.OUTLOOK.COM (2603:10a6:910:47::16) To DM4PR11MB6117.namprd11.prod.outlook.com (2603:10b6:8:b3::19) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB6117:EE_|SJ0PR11MB5054:EE_ X-MS-Office365-Filtering-Correlation-Id: 7cc8b253-f5dc-4a29-b1ba-08dcc05084f6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014; 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Use that wherever xdp_prog is read and evaluated. > > Signed-off-by: Sriram Yagnaraman > [Kurt: Split patches and use READ_ONCE()] > Signed-off-by: Kurt Kanzenbach Acked-by: Maciej Fijalkowski > --- > drivers/net/ethernet/intel/igb/igb.h | 5 +++++ > drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++--- > 2 files changed, 10 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h > index c718e3d14401..dbba193241b9 100644 > --- a/drivers/net/ethernet/intel/igb/igb.h > +++ b/drivers/net/ethernet/intel/igb/igb.h > @@ -805,6 +805,11 @@ static inline struct netdev_queue *txring_txq(const struct igb_ring *tx_ring) > return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index); > } > > +static inline bool igb_xdp_is_enabled(struct igb_adapter *adapter) > +{ > + return !!READ_ONCE(adapter->xdp_prog); > +} > + > int igb_add_filter(struct igb_adapter *adapter, > struct igb_nfc_filter *input); > int igb_erase_filter(struct igb_adapter *adapter, > diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c > index 0b81665b2478..db1598876424 100644 > --- a/drivers/net/ethernet/intel/igb/igb_main.c > +++ b/drivers/net/ethernet/intel/igb/igb_main.c > @@ -2946,7 +2946,8 @@ int igb_xdp_xmit_back(struct igb_adapter *adapter, struct xdp_buff *xdp) > /* During program transitions its possible adapter->xdp_prog is assigned > * but ring has not been configured yet. In this case simply abort xmit. > */ > - tx_ring = adapter->xdp_prog ? igb_xdp_tx_queue_mapping(adapter) : NULL; > + tx_ring = igb_xdp_is_enabled(adapter) ? > + igb_xdp_tx_queue_mapping(adapter) : NULL; > if (unlikely(!tx_ring)) > return IGB_XDP_CONSUMED; > > @@ -2979,7 +2980,8 @@ static int igb_xdp_xmit(struct net_device *dev, int n, > /* During program transitions its possible adapter->xdp_prog is assigned > * but ring has not been configured yet. In this case simply abort xmit. > */ > - tx_ring = adapter->xdp_prog ? igb_xdp_tx_queue_mapping(adapter) : NULL; > + tx_ring = igb_xdp_is_enabled(adapter) ? > + igb_xdp_tx_queue_mapping(adapter) : NULL; > if (unlikely(!tx_ring)) > return -ENXIO; > > @@ -6612,7 +6614,7 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu) > struct igb_adapter *adapter = netdev_priv(netdev); > int max_frame = new_mtu + IGB_ETH_PKT_HDR_PAD; > > - if (adapter->xdp_prog) { > + if (igb_xdp_is_enabled(adapter)) { > int i; > > for (i = 0; i < adapter->num_rx_queues; i++) { > > -- > 2.39.2 >