netdev - [PATCH net-next v2 2/9] xsk: add descs parameter in xskq_cons_read_desc

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Message-Id: <20250825135342.53110-3-kerneljasonxing@gmail.com>
Date: Mon, 25 Aug 2025 21:53:35 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	bjorn@...nel.org,
	magnus.karlsson@...el.com,
	maciej.fijalkowski@...el.com,
	jonathan.lemon@...il.com,
	sdf@...ichev.me,
	ast@...nel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com,
	horms@...nel.org,
	andrew+netdev@...n.ch
Cc: bpf@...r.kernel.org,
	netdev@...r.kernel.org,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next v2 2/9] xsk: add descs parameter in xskq_cons_read_desc_batch()

From: Jason Xing <kernelxing@...cent.com>

Add a new parameter to let generic xmit call this interface in the
subsequent patches.

Prior to this patch, pool->tx_descs in xskq_cons_read_desc_batch() is
only used to store a small number of descs in zerocopy mode. Later
another similar cache named xs->desc_batch will be used in copy mode.
So adjust the parameter for copy mode.

Signed-off-by: Jason Xing <kernelxing@...cent.com>
---
 net/xdp/xsk.c       | 2 +-
 net/xdp/xsk_queue.h | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index e75a6e2bab83..173ad49379c3 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -509,7 +509,7 @@ u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 nb_pkts)
 	if (!nb_pkts)
 		goto out;
 
-	nb_pkts = xskq_cons_read_desc_batch(xs->tx, pool, nb_pkts);
+	nb_pkts = xskq_cons_read_desc_batch(xs->tx, pool, pool->tx_descs, nb_pkts);
 	if (!nb_pkts) {
 		xs->tx->queue_empty_descs++;
 		goto out;
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index 46d87e961ad6..47741b4c285d 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -235,10 +235,9 @@ static inline void parse_desc(struct xsk_queue *q, struct xsk_buff_pool *pool,
 
 static inline
 u32 xskq_cons_read_desc_batch(struct xsk_queue *q, struct xsk_buff_pool *pool,
-			      u32 max)
+			      struct xdp_desc *descs, u32 max)
 {
 	u32 cached_cons = q->cached_cons, nb_entries = 0;
-	struct xdp_desc *descs = pool->tx_descs;
 	u32 total_descs = 0, nr_frags = 0;
 
 	/* track first entry, if stumble upon *any* invalid descriptor, rewind
-- 
2.41.3