diff mbox series

[iwl-next,v9,2/6] igb: Introduce igb_xdp_is_enabled()

Message ID 20241018-b4-igb_zero_copy-v9-2-da139d78d796@linutronix.de
State Under Review
Delegated to: Anthony Nguyen
Headers show
Series igb: Add support for AF_XDP zero-copy | expand

Commit Message

Kurt Kanzenbach Oct. 18, 2024, 8:39 a.m. UTC
From: Sriram Yagnaraman <sriram.yagnaraman@est.tech>

Introduce igb_xdp_is_enabled() to check if an XDP program is assigned to
the device. Use that wherever xdp_prog is read and evaluated.

Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
[Kurt: Split patches and use READ_ONCE()]
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 drivers/net/ethernet/intel/igb/igb.h      | 5 +++++
 drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++---
 2 files changed, 10 insertions(+), 3 deletions(-)

Comments

Kuruvinakunnel, George Oct. 26, 2024, 4:55 p.m. UTC | #1
> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of
> Kurt Kanzenbach
> Sent: Friday, October 18, 2024 1:40 AM
> To: Nguyen, Anthony L <anthony.l.nguyen@intel.com>; Kitszel, Przemyslaw
> <przemyslaw.kitszel@intel.com>
> Cc: David S. Miller <davem@davemloft.net>; Eric Dumazet
> <edumazet@google.com>; Jakub Kicinski <kuba@kernel.org>; Paolo Abeni
> <pabeni@redhat.com>; Alexei Starovoitov <ast@kernel.org>; Daniel
> Borkmann <daniel@iogearbox.net>; Jesper Dangaard Brouer
> <hawk@kernel.org>; John Fastabend <john.fastabend@gmail.com>; Richard
> Cochran <richardcochran@gmail.com>; Sriram Yagnaraman
> <sriram.yagnaraman@ericsson.com>; Benjamin Steinke
> <benjamin.steinke@woks-audio.com>; Sebastian Andrzej Siewior
> <bigeasy@linutronix.de>; Fijalkowski, Maciej <maciej.fijalkowski@intel.com>;
> intel-wired-lan@lists.osuosl.org; netdev@vger.kernel.org;
> bpf@vger.kernel.org; Sriram Yagnaraman <sriram.yagnaraman@est.tech>;
> Kurt Kanzenbach <kurt@linutronix.de>
> Subject: [Intel-wired-lan] [PATCH iwl-next v9 2/6] igb: Introduce
> igb_xdp_is_enabled()
> 
> From: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
> 
> Introduce igb_xdp_is_enabled() to check if an XDP program is assigned to the
> device. Use that wherever xdp_prog is read and evaluated.
> 
> Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
> [Kurt: Split patches and use READ_ONCE()]
> Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
> Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> ---
>  drivers/net/ethernet/intel/igb/igb.h      | 5 +++++
>  drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++---
>  2 files changed, 10 insertions(+), 3 deletions(-)
> 

Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 1bfe703e73d9..6e2b61ecff68 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -826,6 +826,11 @@  static inline struct igb_ring *igb_xdp_tx_queue_mapping(struct igb_adapter *adap
 	return adapter->tx_ring[r_idx];
 }
 
+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 5a44867bcb26..fc30966282c5 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2926,7 +2926,8 @@  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;
 
@@ -2959,7 +2960,8 @@  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;
 
@@ -6593,7 +6595,7 @@  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++) {