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Commit fba7c43d authored by Madalin Bucur's avatar Madalin Bucur Committed by Greg Kroah-Hartman
Browse files

fsl/fman: fix parser reporting bad checksum on short frames 



[ Upstream commit b95f6fbc8e15803a596ca5e5e21008fba29694c6 ]

The FMan hardware parser needs to be configured to remove the
short frame padding from the checksum calculation, otherwise
short UDP and TCP frames are likely to be marked as having a
bad checksum.

Signed-off-by: default avatarMadalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3baa3f92

drivers/net/ethernet/freescale/fman/fman_port.c

+8 −0
Original line number Diff line number Diff line
@@ -324,6 +324,10 @@ struct fman_port_qmi_regs { 
#define HWP_HXS_PHE_REPORT 0x00000800

#define HWP_HXS_PCAC_PSTAT 0x00000100

#define HWP_HXS_PCAC_PSTOP 0x00000001

#define HWP_HXS_TCP_OFFSET 0xA

#define HWP_HXS_UDP_OFFSET 0xB

#define HWP_HXS_SH_PAD_REM 0x80000000



struct fman_port_hwp_regs {

	struct {

		u32 ssa; /* Soft Sequence Attachment */
@@ -728,6 +732,10 @@ static void init_hwp(struct fman_port *port) 
		iowrite32be(0xffffffff, &regs->pmda[i].lcv);

	}



	/* Short packet padding removal from checksum calculation */

	iowrite32be(HWP_HXS_SH_PAD_REM, &regs->pmda[HWP_HXS_TCP_OFFSET].ssa);

	iowrite32be(HWP_HXS_SH_PAD_REM, &regs->pmda[HWP_HXS_UDP_OFFSET].ssa);



	start_port_hwp(port);

}