As a result, code duplication will be avoided in the current
TSO implementations (EFX and EF10 native). The future patch to
add support for tunnel TSO will also reuse the new function.
Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Numbers of extra descriptors required for TSO are EF10-specific
in fact. Highlight it in define names.
Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Add missing header guard, including compiler directive for cplusplus.
Fixes: f1f575be9b ("net/sfc: put generalised TSO declarations in a header")
Cc: stable@dpdk.org
Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Implementation includes following limitations:
1) Packet's header length must be less than 256 (SFC_TSOH_STD_LEN);
2) Offset of the TCP header must be less than 208
(EF10_TCP_HEADER_OFFSET_LIMIT);
3) Number of Tx descriptors must be not less than number of descriptors
needed for TSO settings plus header plus one data segment.
If above conditions are not met, the packet is dropped.
If the maximum descriptor space is insufficient to hold entire TSO packet,
only a part of the packet is sent.
Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Move general TSO declarations in a separate header to be able to use
them in other datapaths (not only EFX). Also update the function that
prepares TSO header to make it useful in other datapaths.
Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
