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mbuf: enhance the API documentation of offload flags

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Based on http://dpdk.org/ml/archives/dev/2015-January/011127.html

Also adapt the csum forward engine code to the API.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Jijiang Liu <jijiang.liu@intel.com>
This commit is contained in:
Olivier Matz 2015-02-13 10:22:33 +01:00 committed by Thomas Monjalon
parent fac4c750b2
commit 609dd68ef1
2 changed files with 41 additions and 10 deletions
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6
app/test-pmd/csumonly.c
View File

@ -183,16 +183,15 @@ process_inner_cksums(void *l3_hdr, uint16_t ethertype, uint16_t l3_len,
ipv4_hdr = l3_hdr;
ipv4_hdr->hdr_checksum = 0;
ol_flags |= PKT_TX_IPV4;
if (tso_segsz != 0 && l4_proto == IPPROTO_TCP) {
ol_flags |= PKT_TX_IP_CKSUM;
} else {
if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM)
ol_flags |= PKT_TX_IP_CKSUM;
else {
else
ipv4_hdr->hdr_checksum =
rte_ipv4_cksum(ipv4_hdr);
ol_flags |= PKT_TX_IPV4;
}
}
} else if (ethertype == _htons(ETHER_TYPE_IPv6))
ol_flags |= PKT_TX_IPV6;
@ -261,6 +260,7 @@ process_outer_cksums(void *outer_l3_hdr, uint16_t outer_ethertype,
if (outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
ipv4_hdr->hdr_checksum = 0;
ol_flags |= PKT_TX_OUTER_IPV4;
if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
ol_flags |= PKT_TX_OUTER_IP_CKSUM;

45
lib/librte_mbuf/rte_mbuf.h
View File

@ -141,24 +141,55 @@ extern "C" {
#define PKT_TX_UDP_CKSUM (3ULL << 52) /**< UDP cksum of TX pkt. computed by NIC. */
#define PKT_TX_L4_MASK (3ULL << 52) /**< Mask for L4 cksum offload request. */
#define PKT_TX_IP_CKSUM (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
/**
* Offload the IP checksum in the hardware. The flag PKT_TX_IPV4 should
* also be set by the application, although a PMD will only check
* PKT_TX_IP_CKSUM.
* - set the IP checksum field in the packet to 0
* - fill the mbuf offload information: l2_len, l3_len
*/
#define PKT_TX_IP_CKSUM (1ULL << 54)
/** Packet is IPv4 without requiring IP checksum offload. */
/**
* Packet is IPv4. This flag must be set when using any offload feature
* (TSO, L3 or L4 checksum) to tell the NIC that the packet is an IPv4
* packet. If the packet is a tunneled packet, this flag is related to
* the inner headers.
*/
#define PKT_TX_IPV4 (1ULL << 55)
/** Tell the NIC it's an IPv6 packet.*/
/**
* Packet is IPv6. This flag must be set when using an offload feature
* (TSO or L4 checksum) to tell the NIC that the packet is an IPv6
* packet. If the packet is a tunneled packet, this flag is related to
* the inner headers.
*/
#define PKT_TX_IPV6 (1ULL << 56)
#define PKT_TX_VLAN_PKT (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */
/** Outer IP checksum of TX packet, computed by NIC for tunneling packet.
* The tunnel type must also be specified, ex: PKT_TX_UDP_TUNNEL_PKT. */
/**
* Offload the IP checksum of an external header in the hardware. The
* flag PKT_TX_OUTER_IPV4 should also be set by the application, alto ugh
* a PMD will only check PKT_TX_IP_CKSUM. The IP checksum field in the
* packet must be set to 0.
* - set the outer IP checksum field in the packet to 0
* - fill the mbuf offload information: outer_l2_len, outer_l3_len
*/
#define PKT_TX_OUTER_IP_CKSUM (1ULL << 58)
/** Packet is outer IPv4 without requiring IP checksum offload for tunneling packet. */
/**
* Packet outer header is IPv4. This flag must be set when using any
* outer offload feature (L3 or L4 checksum) to tell the NIC that the
* outer header of the tunneled packet is an IPv4 packet.
*/
#define PKT_TX_OUTER_IPV4 (1ULL << 59)
/** Tell the NIC it's an outer IPv6 packet for tunneling packet */
/**
* Packet outer header is IPv6. This flag must be set when using any
* outer offload feature (L4 checksum) to tell the NIC that the outer
* header of the tunneled packet is an IPv6 packet.
*/
#define PKT_TX_OUTER_IPV6 (1ULL << 60)
/* Use final bit of flags to indicate a control mbuf */