[dpdk-dev] [PATCH v2 2/4] ethdev: add Tx offload outer UDP checksum definition
Jerin Jacob
jerin.jacob at caviumnetworks.com
Tue Oct 2 21:24:49 CEST 2018
Introduced DEV_TX_OFFLOAD_OUTER_UDP_CKSUM offload flags and
PKT_TX_OUTER_TCP_CKSUM mbuf ol_flags to enable Tx outer UDP
checksum offload.
To use hardware Tx outer UDP checksum offload, the user needs to,
- enable following in mbuff:
a) fill outer_l2_len and outer_l3_len in mbuf
b) set the PKT_TX_OUTER_UDP_CKSUM flag
c) set the flag PKT_TX_OUTER_IPV4 or PKT_TX_OUTER_IPV6
- configure DEV_TX_OFFLOAD_OUTER_UDP_CKSUM offload flags in slow path
Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
---
v2:
- Removed DEV_TX_OFFLOAD_OUTER_TCP_CKSUM and DEV_TX_OFFLOAD_OUTER_SCTP_CKSUM
as there is no realworld use case for it.
See: http://patches.dpdk.org/patch/44692/
This patch series is depended on http://patches.dpdk.org/patch/45840/
---
app/test-pmd/config.c | 10 ++++++++++
doc/guides/nics/features.rst | 6 ++++++
lib/librte_ethdev/rte_ethdev.c | 1 +
lib/librte_ethdev/rte_ethdev.h | 2 ++
lib/librte_mbuf/rte_mbuf.c | 1 +
lib/librte_mbuf/rte_mbuf.h | 6 +++++-
6 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index d53c527e5..5d9745ae5 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -773,6 +773,16 @@ port_offload_cap_display(portid_t port_id)
else
printf("off\n");
}
+
+ if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
+ printf("TX Outer UDP checksum: ");
+ if (ports[port_id].dev_conf.txmode.offloads &
+ DEV_TX_OFFLOAD_OUTER_UDP_CKSUM)
+ printf("on\n");
+ else
+ printf("off\n");
+ }
+
}
int
diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index 2c2959e0b..1390e9668 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -640,8 +640,14 @@ Inner L4 checksum
Supports inner packet L4 checksum.
* **[uses] rte_eth_rxconf,rte_eth_rxmode**: ``offloads:DEV_RX_OFFLOAD_OUTER_UDP_CKSUM``.
+* **[uses] rte_eth_txconf,rte_eth_txmode**: ``offloads:DEV_TX_OFFLOAD_OUTER_UDP_CKSUM``.
+* **[uses] mbuf**: ``mbuf.ol_flags:PKT_TX_OUTER_IPV4`` | ``PKT_TX_OUTER_IPV6``.
+ ``mbuf.ol_flags:PKT_TX_OUTER_UDP_CKSUM``.
+* **[uses] mbuf**: ``mbuf.outer_l2_len``, ``mbuf.outer_l3_len``.
* **[provides] mbuf**: ``mbuf.ol_flags:PKT_RX_EL4_CKSUM_BAD``.
* **[provides] rte_eth_dev_info**: ``rx_offload_capa,rx_queue_offload_capa:DEV_RX_OFFLOAD_OUTER_UDP_CKSUM``,
+ ``tx_offload_capa,tx_queue_offload_capa:DEV_TX_OFFLOAD_OUTER_UDP_CKSUM``.
+
.. _nic_features_packet_type_parsing:
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index a630c4fda..bb48b5a0f 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -159,6 +159,7 @@ static const struct {
RTE_TX_OFFLOAD_BIT2STR(SECURITY),
RTE_TX_OFFLOAD_BIT2STR(UDP_TNL_TSO),
RTE_TX_OFFLOAD_BIT2STR(IP_TNL_TSO),
+ RTE_TX_OFFLOAD_BIT2STR(OUTER_UDP_CKSUM),
};
#undef RTE_TX_OFFLOAD_BIT2STR
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 821d371c3..79d0bb1ed 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -944,6 +944,8 @@ struct rte_eth_conf {
* for tunnel TSO.
*/
#define DEV_TX_OFFLOAD_IP_TNL_TSO 0x00080000
+/** Device supports outer UDP checksum */
+#define DEV_TX_OFFLOAD_OUTER_UDP_CKSUM 0x00100000
#define RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP 0x00000001
/**< Device supports Rx queue setup after device started*/
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 022e92b3c..9db4317ef 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -437,6 +437,7 @@ rte_get_tx_ol_flag_list(uint64_t mask, char *buf, size_t buflen)
"PKT_TX_TUNNEL_NONE" },
{ PKT_TX_MACSEC, PKT_TX_MACSEC, NULL },
{ PKT_TX_SEC_OFFLOAD, PKT_TX_SEC_OFFLOAD, NULL },
+ { PKT_TX_OUTER_UDP_CKSUM, PKT_TX_OUTER_UDP_CKSUM, NULL },
};
const char *name;
unsigned int i;
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 5c03e98b3..0a2de50ca 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -184,6 +184,9 @@ extern "C" {
/* add new TX flags here */
+/**< Outer UDP cksum of TX pkt. computed by NIC. */
+#define PKT_TX_OUTER_UDP_CKSUM (1ULL << 41)
+
/**
* UDP Fragmentation Offload flag. This flag is used for enabling UDP
* fragmentation in SW or in HW. When use UFO, mbuf->tso_segsz is used
@@ -351,7 +354,8 @@ extern "C" {
PKT_TX_TUNNEL_MASK | \
PKT_TX_MACSEC | \
PKT_TX_SEC_OFFLOAD | \
- PKT_TX_UDP_SEG)
+ PKT_TX_UDP_SEG | \
+ PKT_TX_OUTER_UDP_CKSUM)
/**
* Mbuf having an external buffer attached. shinfo in mbuf must be filled.
--
2.19.0
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