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Commit 2e860bb6 authored by Sunil Paidimarri's avatar Sunil Paidimarri
Browse files

net: stmmac: Enable CRC clipping bit 



When the bit is set the last four bytes of the ethernet
packet type is stripped and dropped before forwarding.

Change-Id: I740a513c90a85e3a390984602fd12539e567fc11
Acked-by: default avatarAbhishek Chauhan <abchauha@qti.qualcomm.com>
Signed-off-by: default avatarSunil Paidimarri <hisunil@codeaurora.org>
parent f20d9cb7

Documentation/devicetree/bindings/net/stmmac.txt

+4 −0
Original line number Diff line number Diff line
@@ -116,6 +116,10 @@ Optional properties: 
			- snps,high_credit: max write outstanding req. limit

			- snps,low_credit: max read outstanding req. limit

		- snps,priority: TX queue priority (Range: 0x0 to 0xF)

- snps,crc_strip: this enables the CRC stripping feature in the hardware and the

		  last four bytes of the ethernet packet type is stripped and

		  dropped before forwarding.



Examples:



	stmmac_axi_setup: stmmac-axi-config {

drivers/net/ethernet/stmicro/stmmac/common.h

+1 −0
Original line number Diff line number Diff line
@@ -600,6 +600,7 @@ struct mac_device_info { 
	unsigned int pcs;

	unsigned int pmt;

	unsigned int ps;

	unsigned int crc_strip_en;

};



struct stmmac_rx_routing {

drivers/net/ethernet/stmicro/stmmac/dwmac4.h

+1 −0
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ enum power_event { 
/* MAC config */

#define GMAC_CONFIG_IPC			BIT(27)

#define GMAC_CONFIG_2K			BIT(22)

#define GMAC_CONFIG_CRC			BIT(21)

#define GMAC_CONFIG_ACS			BIT(20)

#define GMAC_CONFIG_BE			BIT(18)

#define GMAC_CONFIG_JD			BIT(17)

drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c

+4 −1
Original line number Diff line number Diff line
@@ -35,10 +35,13 @@ static void dwmac4_core_init(struct mac_device_info *hw, 
	if (mtu > 2000)

		value |= GMAC_CONFIG_JE;



	if (hw->crc_strip_en)

		value |= GMAC_CONFIG_CRC;



	if (hw->ps) {

		value |= GMAC_CONFIG_TE;



		value &= hw->link.speed_mask;

		value &= ~(hw->link.speed_mask);

		switch (hw->ps) {

		case SPEED_1000:

			value |= hw->link.speed1000;

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

+1 −0
Original line number Diff line number Diff line
@@ -2624,6 +2624,7 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) 
			priv->hw->ps = 0;

		}

	}

	priv->hw->crc_strip_en = priv->plat->crc_strip_en;



	/* Initialize the MAC Core */

	priv->hw->mac->core_init(priv->hw, dev);