linux-kernel - [PATCH net-next 3/5] net: stmmac: dwmac4: Enable RX Jumbo frame support

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Message-Id: <1eb3adcf838e92cffd2c4a6ef405fed0f3ac2b1e.1567755423.git.joabreu@synopsys.com>
Date:   Fri,  6 Sep 2019 09:41:15 +0200
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/5] net: stmmac: dwmac4: Enable RX Jumbo frame support

We are already doing it by default in the TX path so we can also enable
Jumbo Frame support in the RX path independently of MTU value.

Signed-off-by: Jose Abreu <joabreu@...opsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Cc: Jose Abreu <joabreu@...opsys.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/dwmac4.h      | 3 ++-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 6 ------
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index 2ed11a581d80..03301ffc0391 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -352,7 +352,8 @@ enum power_event {
 
 /* Default operating mode of the MAC */
 #define GMAC_CORE_INIT (GMAC_CONFIG_JD | GMAC_CONFIG_PS | \
-			GMAC_CONFIG_BE | GMAC_CONFIG_DCRS)
+			GMAC_CONFIG_BE | GMAC_CONFIG_DCRS | \
+			GMAC_CONFIG_JE)
 
 /* To dump the core regs excluding  the Address Registers */
 #define	GMAC_REG_NUM	132
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index fc9954e4a772..596311a80d1c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -25,15 +25,9 @@ static void dwmac4_core_init(struct mac_device_info *hw,
 {
 	void __iomem *ioaddr = hw->pcsr;
 	u32 value = readl(ioaddr + GMAC_CONFIG);
-	int mtu = dev->mtu;
 
 	value |= GMAC_CORE_INIT;
 
-	if (mtu > 1500)
-		value |= GMAC_CONFIG_2K;
-	if (mtu > 2000)
-		value |= GMAC_CONFIG_JE;
-
 	if (hw->ps) {
 		value |= GMAC_CONFIG_TE;
 
-- 
2.7.4