From b225999294c5ddfa4eb92248c7ec941038fdead2 Mon Sep 17 00:00:00 2001
From: Jose Abreu <Jose.Abreu@synopsys.com>
Date: Thu, 26 Oct 2017 10:07:12 +0100
Subject: [PATCH 05/21] net: stmmac: First Queue must always be in DCB mode
Git-commit: 6d9f0790af8d33476f936ac84a07cac42f808f6c
Patch-mainline: v4.14-rc7
References: git-fixes
According to DWMAC databook the first queue operating mode
must always be in DCB.
As MTL_QUEUE_DCB = 1, we need to always set the first queue
operating mode to DCB otherwise driver will think that queue
is in AVB mode (because MTL_QUEUE_AVB = 0).
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 9aa60d85fe65..eb11dcccf529 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -150,6 +150,13 @@ static void stmmac_mtl_setup(struct platform_device *pdev,
plat->rx_queues_to_use = 1;
plat->tx_queues_to_use = 1;
+ /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
+ * to always set this, otherwise Queue will be classified as AVB
+ * (because MTL_QUEUE_AVB = 0).
+ */
+ plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
+ plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
+
rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
if (!rx_node)
return;
--
2.16.4