Re: [PATCH v2 1/5] ethdev: introduce Tx generic tunnel offloads
From: Ananyev, Konstantin <hidden>
Date: 2018-01-29 16:49:20
Hi Xueming,
This patch introduce new TX offloads flag for devices that support tunnel agnostic checksum and TSO offloads. The support from the device is for inner and outer checksums on IPV4/TCP/UDP and TSO for *any packet with the following format*: < some headers > / [optional IPv4/IPv6] / [optional TCP/UDP] / <some headers> / [optional inner IPv4/IPv6] / [optional TCP/UDP] For example the following packets can use this feature: 1. eth / ipv4 / udp / VXLAN / ip / tcp 2. eth / ipv4 / GRE / MPLS / ipv4 / udp
So in terms of usage - what is the difference with current TSO types? Konstantin
quoted hunk ↗ jump to hunk
Signed-off-by: Xueming Li <redacted> --- lib/librte_ether/rte_ethdev.h | 10 ++++++++++ 1 file changed, 10 insertions(+)diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h index 1a5b4cdc5..d8d08ccb2 100644 --- a/lib/librte_ether/rte_ethdev.h +++ b/lib/librte_ether/rte_ethdev.h@@ -979,6 +979,16 @@ struct rte_eth_conf { * the same mempool and has refcnt = 1. */ #define DEV_TX_OFFLOAD_SECURITY 0x00020000 +/**< Device supports generic tunnel checksum and TSO offloading. + * Checksum and TSO are done based on following mbuf fields: + * - Length of each header + * - Type of outer/inner L3 type, IPv4 or IPv6 + * - Type of outer/inner L4 type, TCP or UDP. + * - PKT_TX_TUNNEL_VXLAN implies outer UDP type. + * - PKT_TX_TCP_SEG implies inner TCP type. + * Tunnel type is optional except PKT_TX_TUNNEL_VXLAN to hint outer UDP. + */ +#define DEV_TX_OFFLOAD_GENERIC_TNL_CKSUM_TSO 0x00040000 /* * If new Tx offload capabilities are defined, they also must be --2.13.3