* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * Copyright 2014 6WIND S.A.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* - The most-significant 8 bits are reserved for generic mbuf flags
* - TX flags therefore start at bit position 55 (i.e. 63-8), and new flags get
* added to the right of the previously defined flags
+ *
+ * Keep these flags synchronized with rte_get_rx_ol_flag_name() and
+ * rte_get_tx_ol_flag_name().
*/
#define PKT_RX_VLAN_PKT (1ULL << 0) /**< RX packet is a 802.1q VLAN packet. */
#define PKT_RX_RSS_HASH (1ULL << 1) /**< RX packet with RSS hash result. */
/* add new RX flags here */
/* add new TX flags here */
+
+/**
+ * TCP segmentation offload. To enable this offload feature for a
+ * packet to be transmitted on hardware supporting TSO:
+ * - set the PKT_TX_TCP_SEG flag in mbuf->ol_flags (this flag implies
+ * PKT_TX_TCP_CKSUM)
+ * - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
+ * - if it's IPv4, set the PKT_TX_IP_CKSUM flag and write the IP checksum
+ * to 0 in the packet
+ * - fill the mbuf offload information: l2_len, l3_len, l4_len, tso_segsz
+ * - calculate the pseudo header checksum without taking ip_len in account,
+ * and set it in the TCP header. Refer to rte_ipv4_phdr_cksum() and
+ * rte_ipv6_phdr_cksum() that can be used as helpers.
+ */
+#define PKT_TX_TCP_SEG (1ULL << 49)
+
#define PKT_TX_VXLAN_CKSUM (1ULL << 50) /**< TX checksum of VXLAN computed by NIC */
#define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
* - set the flags PKT_TX_TCP_CKSUM, PKT_TX_SCTP_CKSUM or PKT_TX_UDP_CKSUM
* - set the flag PKT_TX_IPV4 or PKT_TX_IPV6
* - calculate the pseudo header checksum and set it in the L4 header (only
- * for TCP or UDP). For SCTP, set the crc field to 0.
+ * for TCP or UDP). See rte_ipv4_phdr_cksum() and rte_ipv6_phdr_cksum().
+ * For SCTP, set the crc field to 0.
*/
#define PKT_TX_L4_NO_CKSUM (0ULL << 52) /**< Disable L4 cksum of TX pkt. */
#define PKT_TX_TCP_CKSUM (1ULL << 52) /**< TCP cksum of TX pkt. computed by NIC. */
#define PKT_TX_IP_CKSUM (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
#define PKT_TX_IPV4_CSUM PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */
-/** Tell the NIC it's an IPv4 packet. Required for L4 checksum offload. */
+/** Tell the NIC it's an IPv4 packet. Required for L4 checksum offload or TSO. */
#define PKT_TX_IPV4 PKT_RX_IPV4_HDR
-/** Tell the NIC it's an IPv6 packet. Required for L4 checksum offload. */
+/** Tell the NIC it's an IPv6 packet. Required for L4 checksum offload or TSO. */
#define PKT_TX_IPV6 PKT_RX_IPV6_HDR
#define PKT_TX_VLAN_PKT (1ULL << 55) /**< TX packet is a 802.1q VLAN packet. */
#define CTRL_MBUF_FLAG (1ULL << 63) /**< Mbuf contains control data */
/**
- * Bit Mask to indicate what bits required for building TX context
+ * Get the name of a RX offload flag
+ *
+ * @param mask
+ * The mask describing the flag.
+ * @return
+ * The name of this flag, or NULL if it's not a valid RX flag.
+ */
+const char *rte_get_rx_ol_flag_name(uint64_t mask);
+
+/**
+ * Get the name of a TX offload flag
+ *
+ * @param mask
+ * The mask describing the flag. Usually only one bit must be set.
+ * Several bits can be given if they belong to the same mask.
+ * Ex: PKT_TX_L4_MASK.
+ * @return
+ * The name of this flag, or NULL if it's not a valid TX flag.
*/
-#define PKT_TX_OFFLOAD_MASK (PKT_TX_VLAN_PKT | PKT_TX_IP_CKSUM | PKT_TX_L4_MASK)
+const char *rte_get_tx_ol_flag_name(uint64_t mask);
/* define a set of marker types that can be used to refer to set points in the
* mbuf */
/* fields to support TX offloads */
union {
- uint16_t l2_l3_len; /**< combined l2/l3 lengths as single var */
+ uint64_t tx_offload; /**< combined for easy fetch */
struct {
- uint16_t l3_len:9; /**< L3 (IP) Header Length. */
- uint16_t l2_len:7; /**< L2 (MAC) Header Length. */
- };
- };
+ uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
+ uint64_t l3_len:9; /**< L3 (IP) Header Length. */
+ uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
+ uint64_t tso_segsz:16; /**< TCP TSO segment size */
- /* fields for TX offloading of tunnels */
- union {
- uint16_t inner_l2_l3_len;
- /**< combined inner l2/l3 lengths as single var */
- struct {
- uint16_t inner_l3_len:9;
- /**< inner L3 (IP) Header Length. */
- uint16_t inner_l2_len:7;
- /**< inner L2 (MAC) Header Length. */
+ /* fields for TX offloading of tunnels */
+ uint64_t inner_l3_len:9; /**< inner L3 (IP) Hdr Length. */
+ uint64_t inner_l2_len:7; /**< inner L2 (MAC) Hdr Length. */
+
+ /* uint64_t unused:8; */
};
};
} __rte_cache_aligned;
{
m->next = NULL;
m->pkt_len = 0;
- m->l2_l3_len = 0;
- m->inner_l2_l3_len = 0;
+ m->tx_offload = 0;
m->vlan_tci = 0;
m->nb_segs = 1;
m->port = 0xff;
mi->data_len = md->data_len;
mi->port = md->port;
mi->vlan_tci = md->vlan_tci;
- mi->l2_l3_len = md->l2_l3_len;
- mi->inner_l2_l3_len = md->inner_l2_l3_len;
+ mi->tx_offload = md->tx_offload;
mi->hash = md->hash;
mi->next = NULL;
git.droids-corp.org / dpdk.git / blobdiff