linux-kernel - [PATCH net-next v5 4/7] net: lan966x: Update rxq memory model

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Message-ID: <20221123203139.3828548-5-horatiu.vultur@microchip.com>
Date:   Wed, 23 Nov 2022 21:31:36 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <ast@...nel.org>, <daniel@...earbox.net>,
        <hawk@...nel.org>, <john.fastabend@...il.com>,
        <UNGLinuxDriver@...rochip.com>, <alexandr.lobakin@...el.com>,
        <maciej.fijalkowski@...el.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v5 4/7] net: lan966x: Update rxq memory model

By default the rxq memory model is MEM_TYPE_PAGE_SHARED but to be able
to reuse pages on the TX side, when the XDP action XDP_TX it is required
to update the memory model to PAGE_POOL.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 .../net/ethernet/microchip/lan966x/lan966x_fdma.c   | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
index 384ed34197d58..3df3b3d29b4ff 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
@@ -80,6 +80,19 @@ static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx)
 	};
 
 	rx->page_pool = page_pool_create(&pp_params);
+
+	for (int i = 0; i < lan966x->num_phys_ports; ++i) {
+		struct lan966x_port *port;
+
+		if (!lan966x->ports[i])
+			continue;
+
+		port = lan966x->ports[i];
+		xdp_rxq_info_unreg_mem_model(&port->xdp_rxq);
+		xdp_rxq_info_reg_mem_model(&port->xdp_rxq, MEM_TYPE_PAGE_POOL,
+					   rx->page_pool);
+	}
+
 	return PTR_ERR_OR_ZERO(rx->page_pool);
 }
 
-- 
2.38.0