diff options
| author | Nithin Dabilpuram <ndabilpuram@marvell.com> | 2020-10-06 22:18:58 +0530 |
|---|---|---|
| committer | Matias Elo <matias.elo@nokia.com> | 2020-11-02 13:58:47 +0200 |
| commit | d2e08fbd389adbae9f7d1f5117696524cd520918 (patch) | |
| tree | cdd2ffc076d1a9582c44bb29d05051920233fd3a /include | |
| parent | e4b71c5618b8121bffda43d03fd5944c6b1bf103 (diff) | |
api: pktio: add pktout no packet refs offload
Currently ODP spec provides support for holding references
to packets and thereby those packets are not freed by platform
after transmission if they have more than one reference.
This support is useful when using stack that needs retransmissions
like TCP or some fragmentation implementations.
Most of the other forwarding/pipeline applications will not be using
this support as they don't hold any references and forward traffic
after packet manipulations.
Since there is a performance hit in some platforms for supporting
ref count update and validation in odp_pktout_send(),
this patch adds support to indicate via pktio config if PKTIO
can optimize the fastpath for case where packets sent for
transmission will not have multiple references and platform/HW
can always free them post transmission.
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Reviewed-by: Janne Peltonen <janne.peltonen@nokia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/odp/api/spec/packet_io.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/odp/api/spec/packet_io.h b/include/odp/api/spec/packet_io.h index a1322a109..ef6a18522 100644 --- a/include/odp/api/spec/packet_io.h +++ b/include/odp/api/spec/packet_io.h @@ -414,6 +414,20 @@ typedef union odp_pktout_config_opt_t { /** Insert SCTP checksum on packet by default */ uint64_t sctp_chksum : 1; + /** Packet references not used on packet output + * + * When set, application indicates that it will not transmit + * packet references on this packet IO interface. + * Since every ODP implementation supports it, it is always + * ok to set this flag. + * + * 0: Packet references may be transmitted on the + * interface (the default value). + * 1: Packet references will not be transmitted on the + * interface. + */ + uint64_t no_packet_refs : 1; + } bit; /** All bits of the bit field structure |