netdev - [PATCH net-next] tsnep: Add helper for RX XDP_RING_NEED

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Message-Id: <20240131205434.63409-1-gerhard@engleder-embedded.com>
Date: Wed, 31 Jan 2024 21:54:34 +0100
From: Gerhard Engleder <gerhard@...leder-embedded.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	Gerhard Engleder <gerhard@...leder-embedded.com>
Subject: [PATCH net-next] tsnep: Add helper for RX XDP_RING_NEED_WAKEUP flag

Similar chunk of code is used in tsnep_rx_poll_zc() and
tsnep_rx_reopen_xsk() to maintain the RX XDP_RING_NEED_WAKEUP flag.
Consolidate the code to common helper function.

Suggested-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Gerhard Engleder <gerhard@...leder-embedded.com>
---
 drivers/net/ethernet/engleder/tsnep_main.c | 23 +++++++++++-----------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/engleder/tsnep_main.c b/drivers/net/ethernet/engleder/tsnep_main.c
index 11d49d08d017..332d561cb8a4 100644
--- a/drivers/net/ethernet/engleder/tsnep_main.c
+++ b/drivers/net/ethernet/engleder/tsnep_main.c
@@ -1275,6 +1275,14 @@ static int tsnep_rx_refill_zc(struct tsnep_rx *rx, int count, bool reuse)
 	return desc_refilled;
 }
 
+static void tsnep_xsk_rx_need_wakeup(struct tsnep_rx *rx, int desc_available)
+{
+	if (desc_available)
+		xsk_set_rx_need_wakeup(rx->xsk_pool);
+	else
+		xsk_clear_rx_need_wakeup(rx->xsk_pool);
+}
+
 static bool tsnep_xdp_run_prog(struct tsnep_rx *rx, struct bpf_prog *prog,
 			       struct xdp_buff *xdp, int *status,
 			       struct netdev_queue *tx_nq, struct tsnep_tx *tx)
@@ -1636,10 +1644,7 @@ static int tsnep_rx_poll_zc(struct tsnep_rx *rx, struct napi_struct *napi,
 		desc_available -= tsnep_rx_refill_zc(rx, desc_available, false);
 
 	if (xsk_uses_need_wakeup(rx->xsk_pool)) {
-		if (desc_available)
-			xsk_set_rx_need_wakeup(rx->xsk_pool);
-		else
-			xsk_clear_rx_need_wakeup(rx->xsk_pool);
+		tsnep_xsk_rx_need_wakeup(rx, desc_available);
 
 		return done;
 	}
@@ -1784,14 +1789,8 @@ static void tsnep_rx_reopen_xsk(struct tsnep_rx *rx)
 	 * first polling would be too late as need wakeup signalisation would
 	 * be delayed for an indefinite time
 	 */
-	if (xsk_uses_need_wakeup(rx->xsk_pool)) {
-		int desc_available = tsnep_rx_desc_available(rx);
-
-		if (desc_available)
-			xsk_set_rx_need_wakeup(rx->xsk_pool);
-		else
-			xsk_clear_rx_need_wakeup(rx->xsk_pool);
-	}
+	if (xsk_uses_need_wakeup(rx->xsk_pool))
+		tsnep_xsk_rx_need_wakeup(rx, tsnep_rx_desc_available(rx));
 }
 
 static bool tsnep_pending(struct tsnep_queue *queue)
-- 
2.39.2