[dpdk-dev] [PATCH v2 0/3] enhance TX checksum command and csum forwarding engine
Ananyev, Konstantin
konstantin.ananyev at intel.com
Tue Dec 9 15:50:55 CET 2014
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Jijiang Liu
> Sent: Tuesday, December 09, 2014 1:18 PM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH v2 0/3] enhance TX checksum command and csum forwarding engine
>
> In the current codes, the "tx_checksum set (ip|udp|tcp|sctp|vxlan) (hw|sw) (port-id)" command is not easy to understand and
> extend, so the patch set enhances the tx_checksum command and reworks csum forwarding engine due to the change of
> tx_checksum command.
> The main changes of the tx_checksum command are listed below,
>
> 1> add "tx_checksum set tunnel (hw|sw|none) (port-id)" command
>
> The command is used to set/clear tunnel flag that is used to tell the NIC that the packetg is a tunneing packet and application want
> hardware TX checksum offload for outer layer, or inner layer, or both.
>
> The 'none' option means that user treat tunneling packet as ordinary packet when using the csum forward engine.
> for example, let say we have a tunnel packet:
> eth_hdr_out/ipv4_hdr_out/udp_hdr_out/vxlan_hdr/ehtr_hdr_in/ipv4_hdr_in/tcp_hdr_in. one of several scenarios:
>
> 1) User requests HW offload for ipv4_hdr_out checksum, and doesn't care is it a tunnelled packet or not. So he sets:
>
> tx_checksum set tunnel none 0
>
> tx_checksum set ip hw 0
>
> So for such case we should set tx_tunnel to 'none'.
>
> 2> add "tx_checksum set outer-ip (hw|sw) (port-id)" command
>
> The command is used to set/clear outer IP flag that is used to tell the NIC that application want hardware offload for outer layer.
>
> 3> remove the 'vxlan' option from the "tx_checksum set (ip|udp|tcp|sctp|vxlan) (hw|sw) (port-id)" command
>
> The command is used to set IP, UDP, TCP and SCTP TX checksum flag. In the case of tunneling packet, the IP, UDP, TCP and SCTP flags
> always concern inner layer.
>
> Moreover, replace the TESTPMD_TX_OFFLOAD_VXLAN_CKSUM flag with TESTPMD_TX_OFFLOAD_TUNNEL_CKSUM flag and add the
> TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM and TESTPMD_TX_OFFLOAD_NON_TUNNEL_CKSUM flag in test-pmd application.
>
> v2 change:
> redefine the 'none' behaviour for "tx_checksum set tunnel (hw|sw|none) (port-id)" command.
>
> Jijiang Liu (3):
> add outer IP offload capability in librte_ether.
> add outer IP checksum capability in i40e PMD
> testpmd command lines of the tx_checksum and csum forwarding rework
>
> app/test-pmd/cmdline.c | 201 +++++++++++++++++++++++++++++++++++--
> app/test-pmd/csumonly.c | 35 ++++---
> app/test-pmd/testpmd.h | 6 +-
> lib/librte_ether/rte_ethdev.h | 1 +
> lib/librte_pmd_i40e/i40e_ethdev.c | 3 +-
> 5 files changed, 218 insertions(+), 28 deletions(-)
>
Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
> --
> 1.7.7.6
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