ethdev: introduce generic IP/UDP tunnel checksum and TSO

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>

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index b9eb8ae..0d5c8c7 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -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

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 3f4c833..64e960d 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -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 },
        };

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 63a03c2..43aaa9c 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -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)