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ethdev: introduce generic IP/UDP tunnel checksum and TSO

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This patch introduce new TX offload flags for device that supports
IP or UDP tunneled packet L3/L4 checksum and TSO offload.
It will be used for non-standard tunnels.

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

Please note that specific tunnel headers that contain payload length,
sequence id or checksum will not be updated.

Signed-off-by: Xueming Li <xuemingl@mellanox.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Xueming Li 2018-04-23 19:49:35 +08:00 committed by Ferruh Yigit
parent d9aa619c60
commit 5355f4439e
3 changed files with 43 additions and 0 deletions
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12
lib/librte_ether/rte_ethdev.h
View File

@ -980,6 +980,18 @@ struct rte_eth_conf {
* the same mempool and has refcnt = 1.
*/
#define DEV_TX_OFFLOAD_SECURITY 0x00020000
/**
* Device supports generic UDP tunneled packet TSO.
* Application must set PKT_TX_TUNNEL_UDP and other mbuf fields required
* for tunnel TSO.
*/
#define DEV_TX_OFFLOAD_UDP_TNL_TSO 0x00040000
/**
* Device supports generic IP tunneled packet TSO.
* Application must set PKT_TX_TUNNEL_IP and other mbuf fields required
* for tunnel TSO.
*/
#define DEV_TX_OFFLOAD_IP_TNL_TSO 0x00080000
/*
* If new Tx offload capabilities are defined, they also must be

6
lib/librte_mbuf/rte_mbuf.c
View File

@ -390,6 +390,8 @@ const char *rte_get_tx_ol_flag_name(uint64_t mask)
case PKT_TX_TUNNEL_IPIP: return "PKT_TX_TUNNEL_IPIP";
case PKT_TX_TUNNEL_GENEVE: return "PKT_TX_TUNNEL_GENEVE";
case PKT_TX_TUNNEL_MPLSINUDP: return "PKT_TX_TUNNEL_MPLSINUDP";
case PKT_TX_TUNNEL_IP: return "PKT_TX_TUNNEL_IP";
case PKT_TX_TUNNEL_UDP: return "PKT_TX_TUNNEL_UDP";
case PKT_TX_MACSEC: return "PKT_TX_MACSEC";
case PKT_TX_SEC_OFFLOAD: return "PKT_TX_SEC_OFFLOAD";
default: return NULL;
@ -424,6 +426,10 @@ rte_get_tx_ol_flag_list(uint64_t mask, char *buf, size_t buflen)
"PKT_TX_TUNNEL_NONE" },
{ PKT_TX_TUNNEL_MPLSINUDP, PKT_TX_TUNNEL_MASK,
"PKT_TX_TUNNEL_NONE" },
{ PKT_TX_TUNNEL_IP, PKT_TX_TUNNEL_MASK,
"PKT_TX_TUNNEL_NONE" },
{ PKT_TX_TUNNEL_UDP, PKT_TX_TUNNEL_MASK,
"PKT_TX_TUNNEL_NONE" },
{ PKT_TX_MACSEC, PKT_TX_MACSEC, NULL },
{ PKT_TX_SEC_OFFLOAD, PKT_TX_SEC_OFFLOAD, NULL },
};

25
lib/librte_mbuf/rte_mbuf.h
View File

@ -213,6 +213,31 @@ extern "C" {
#define PKT_TX_TUNNEL_GENEVE (0x4ULL << 45)
/** TX packet with MPLS-in-UDP RFC 7510 header. */
#define PKT_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
/**
* Generic IP encapsulated tunnel type, used for TSO and checksum offload.
* It can be used for tunnels which are not standards or listed above.
* It is preferred to use specific tunnel flags like PKT_TX_TUNNEL_GRE
* or PKT_TX_TUNNEL_IPIP if possible.
* The ethdev must be configured with DEV_TX_OFFLOAD_IP_TNL_TSO.
* Outer and inner checksums are done according to the existing flags like
* PKT_TX_xxx_CKSUM.
* Specific tunnel headers that contain payload length, sequence id
* or checksum are not expected to be updated.
*/
#define PKT_TX_TUNNEL_IP (0xDULL << 45)
/**
* Generic UDP encapsulated tunnel type, used for TSO and checksum offload.
* UDP tunnel type implies outer IP layer.
* It can be used for tunnels which are not standards or listed above.
* It is preferred to use specific tunnel flags like PKT_TX_TUNNEL_VXLAN
* if possible.
* The ethdev must be configured with DEV_TX_OFFLOAD_UDP_TNL_TSO.
* Outer and inner checksums are done according to the existing flags like
* PKT_TX_xxx_CKSUM.
* Specific tunnel headers that contain payload length, sequence id
* or checksum are not expected to be updated.
*/
#define PKT_TX_TUNNEL_UDP (0xEULL << 45)
/* add new TX TUNNEL type here */
#define PKT_TX_TUNNEL_MASK (0xFULL << 45)