netdev - [PATCH net] octeontx2-pf: Set maximum queue size to 16K

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Date: Wed, 2 Aug 2023 16:22:27 +0530
From: Ratheesh Kannoth <rkannoth@...vell.com>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <sgoutham@...vell.com>, <gakula@...vell.com>, <sbhatta@...vell.com>,
        <hkelam@...vell.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>,
        Ratheesh Kannoth
	<rkannoth@...vell.com>
Subject: [PATCH net] octeontx2-pf: Set maximum queue size to 16K

page_pool_init() return error on requesting ring size > 32K.
PF uses page pool for rx. octeon-tx2 Supported queue size
are 16, 64, 256, 1K, 2K, 4K, 16K, 64K. If user try to
configure larger ring size for rx, return error.

Fixes: b2e3406a38f0 ("octeontx2-pf: Add support for page pool")
Signed-off-by: Ratheesh Kannoth <rkannoth@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
index c47d91da32dc..978e371008d6 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
@@ -378,7 +378,7 @@ static void otx2_get_ringparam(struct net_device *netdev,
 	struct otx2_nic *pfvf = netdev_priv(netdev);
 	struct otx2_qset *qs = &pfvf->qset;
 
-	ring->rx_max_pending = Q_COUNT(Q_SIZE_MAX);
+	ring->rx_max_pending = 16384; /* Page pool support on RX */
 	ring->rx_pending = qs->rqe_cnt ? qs->rqe_cnt : Q_COUNT(Q_SIZE_256);
 	ring->tx_max_pending = Q_COUNT(Q_SIZE_MAX);
 	ring->tx_pending = qs->sqe_cnt ? qs->sqe_cnt : Q_COUNT(Q_SIZE_4K);
-- 
2.25.1