diff options
| author | Alex Elder <elder@linaro.org> | 2021-06-02 15:41:30 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-04 01:09:40 +0300 |
| commit | 5567d4d9e7381230462a564d4f466177f3ba9dd5 (patch) | |
| tree | 0102afcf7689e9172a1d2a31c56e2940d7efb238 /drivers/net/ipa/ipa_reg.h | |
| parent | fcd1a53064cf44ef912c354859027ef291147848 (diff) | |
| download | linux-5567d4d9e7381230462a564d4f466177f3ba9dd5.tar.xz | |
net: ipa: add support for inline checksum offload
Starting with IPA v4.5, IP payload checksum offload is implemented
differently.
Prior to v4.5, the IPA hardware appends an rmnet_map_dl_csum_trailer
structure to each packet if checksum offload is enabled in the
download direction (modem->AP). In the upload direction (AP->modem)
a rmnet_map_ul_csum_header structure is prepended before each sent
packet.
Starting with IPA v4.5, checksum offload is implemented using a
single new rmnet_map_v5_csum_header structure which sits between
the QMAP header and the packet data. The same header structure
is used in both directions.
The new header contains a header type (CSUM_OFFLOAD); a checksum
flag; and a flag indicating whether any other headers follow this
one. The checksum flag indicates whether the hardware should
compute (and insert) the checksum on a sent packet. On a received
packet the checksum flag indicates whether the hardware confirms the
checksum value in the payload is correct.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ipa/ipa_reg.h')
| -rw-r--r-- | drivers/net/ipa/ipa_reg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h index 286ea9634c49..b89dec5865a5 100644 --- a/drivers/net/ipa/ipa_reg.h +++ b/drivers/net/ipa/ipa_reg.h @@ -368,6 +368,7 @@ enum ipa_cs_offload_en { IPA_CS_OFFLOAD_NONE = 0x0, IPA_CS_OFFLOAD_UL = 0x1, /* Before IPA v4.5 (TX) */ IPA_CS_OFFLOAD_DL = 0x2, /* Before IPA v4.5 (RX) */ + IPA_CS_OFFLOAD_INLINE = 0x1, /* IPA v4.5 (TX and RX) */ }; /* Valid only for TX (IPA consumer) endpoints */ |