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From:   Horatiu Vultur <horatiu.vultur@microchip.com>
To:     <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <bpf@vger.kernel.org>
CC:     <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <pabeni@redhat.com>, <ast@kernel.org>, <daniel@iogearbox.net>,
        <hawk@kernel.org>, <john.fastabend@gmail.com>,
        <UNGLinuxDriver@microchip.com>,
        Horatiu Vultur <horatiu.vultur@microchip.com>
Subject: [PATCH net-next v3 4/7] net: lan966x: Update rxq memory model
Date:   Mon, 21 Nov 2022 22:28:47 +0100
Message-ID: <20221121212850.3212649-5-horatiu.vultur@microchip.com>
In-Reply-To: <20221121212850.3212649-1-horatiu.vultur@microchip.com>
References: <20221121212850.3212649-1-horatiu.vultur@microchip.com>
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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@microchip.com>
---
 .../net/ethernet/microchip/lan966x/lan966x_fdma.c  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
index 384ed34197d58..483d1470c8362 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c
@@ -78,8 +78,22 @@ static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx)
 		.max_len = rx->max_mtu -
 			   SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
 	};
+	struct lan966x_port *port;
+	int i;
 
 	rx->page_pool = page_pool_create(&pp_params);
+
+	for (i = 0; i < lan966x->num_phys_ports; ++i) {
+		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