forked from mirrors/linux
a7cf3d24ee
The udp_ip4_ind bit is set only for IPv4 UDP non-fragmented packets
so that the hardware can flip the checksum to 0xFFFF if the computed
checksum is 0 per RFC768.
However, this bit had to be set for IPv6 UDP non fragmented packets
as well per hardware requirements. Otherwise, IPv6 UDP packets
with computed checksum as 0 were transmitted by hardware and were
dropped in the network.
In addition to setting this bit for IPv6 UDP, the field is also
appropriately renamed to udp_ind as part of this change.
Fixes: 5eb5f8608e ("net: qualcomm: rmnet: Add support for TX checksum offload")
Cc: Sean Tranchetti <stranche@codeaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only
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* Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
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*/
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#ifndef _LINUX_IF_RMNET_H_
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#define _LINUX_IF_RMNET_H_
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struct rmnet_map_header {
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 pad_len:6;
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u8 reserved_bit:1;
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u8 cd_bit:1;
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#elif defined (__BIG_ENDIAN_BITFIELD)
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u8 cd_bit:1;
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u8 reserved_bit:1;
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u8 pad_len:6;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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u8 mux_id;
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__be16 pkt_len;
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} __aligned(1);
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struct rmnet_map_dl_csum_trailer {
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u8 reserved1;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u8 valid:1;
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u8 reserved2:7;
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#elif defined (__BIG_ENDIAN_BITFIELD)
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u8 reserved2:7;
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u8 valid:1;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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u16 csum_start_offset;
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u16 csum_length;
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__be16 csum_value;
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} __aligned(1);
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struct rmnet_map_ul_csum_header {
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__be16 csum_start_offset;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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u16 csum_insert_offset:14;
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u16 udp_ind:1;
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u16 csum_enabled:1;
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#elif defined (__BIG_ENDIAN_BITFIELD)
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u16 csum_enabled:1;
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u16 udp_ind:1;
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u16 csum_insert_offset:14;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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} __aligned(1);
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#endif /* !(_LINUX_IF_RMNET_H_) */
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