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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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d361536fc2
Ethernet frame consists of - Ethernet header, payload, FCS. The MTU value which is used by user is the size of the payload, which means that when user sets MTU to X, the total frame size will be larger due to the addition of the Ethernet header and FCS. Spectrum ASICs take into account Ethernet header and FCS as part of packet size for MTU check. Adjust MTU value when user sets MTU, to configure the MTU size which is required by hardware. The Tx header length which was used by the driver is not relevant for such calculation, take into account Ethernet header (with VLAN extension) and FCS. Signed-off-by: Amit Cohen <amcohen@nvidia.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Petr Machata <petrm@nvidia.com> Link: https://lore.kernel.org/r/f3203c2477bb8ed18b1e79642fa3e3713e1e55bb.1718275854.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
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/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
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#ifndef _MLXSW_PORT_H
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#define _MLXSW_PORT_H
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#include <linux/types.h>
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#define MLXSW_PORT_MAX_MTU (10 * 1024)
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#define MLXSW_PORT_ETH_FRAME_HDR (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN)
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#define MLXSW_PORT_DEFAULT_VID 1
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#define MLXSW_PORT_SWID_DISABLED_PORT 255
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#define MLXSW_PORT_SWID_ALL_SWIDS 254
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#define MLXSW_PORT_SWID_TYPE_IB 1
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#define MLXSW_PORT_SWID_TYPE_ETH 2
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#define MLXSW_PORT_MAX_IB_PHY_PORTS 36
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#define MLXSW_PORT_MAX_IB_PORTS (MLXSW_PORT_MAX_IB_PHY_PORTS + 1)
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#define MLXSW_PORT_CPU_PORT 0x0
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#define MLXSW_PORT_DONT_CARE 0xFF
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enum mlxsw_port_admin_status {
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MLXSW_PORT_ADMIN_STATUS_UP = 1,
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MLXSW_PORT_ADMIN_STATUS_DOWN = 2,
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MLXSW_PORT_ADMIN_STATUS_UP_ONCE = 3,
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MLXSW_PORT_ADMIN_STATUS_DISABLED = 4,
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};
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enum mlxsw_reg_pude_oper_status {
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MLXSW_PORT_OPER_STATUS_UP = 1,
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MLXSW_PORT_OPER_STATUS_DOWN = 2,
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MLXSW_PORT_OPER_STATUS_FAILURE = 4, /* Can be set to up again. */
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};
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#endif /* _MLXSW_PORT_H */
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