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net/sfc: support RSS hash offload

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Extract RSS hash provided by the HW in the prefix and put it to mbuf.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andrew Lee <alee@solarflare.com>
Reviewed-by: Robert Stonehouse <rstonehouse@solarflare.com>
This commit is contained in:
Ivan Malov 2016-12-15 12:51:18 +00:00 committed by Ferruh Yigit
parent 4ec1fc3ba8
commit d9ff551fc9
3 changed files with 33 additions and 1 deletions
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1
doc/guides/nics/features/sfc_efx.ini
View File

@ -14,6 +14,7 @@ Scattered Rx = Y
Promiscuous mode = Y
Allmulticast mode = Y
Multicast MAC filter = Y
RSS hash = Y
Flow control = Y
VLAN offload = P
L3 checksum offload = Y

2
doc/guides/nics/sfc_efx.rst
View File

@ -71,6 +71,8 @@ SFC EFX PMD has support for:
- Receive side scaling (RSS)
- RSS hash
- Scattered Rx DMA for packet that are larger that a single Rx descriptor
- Deferred receive and transmit queue start

31
drivers/net/sfc/sfc_rx.c
View File

@ -185,6 +185,28 @@ sfc_rx_desc_flags_to_packet_type(const unsigned int desc_flags)
((desc_flags & EFX_PKT_UDP) ? RTE_PTYPE_L4_UDP : 0);
}
static void
sfc_rx_set_rss_hash(struct sfc_rxq *rxq, unsigned int flags, struct rte_mbuf *m)
{
#if EFSYS_OPT_RX_SCALE
uint8_t *mbuf_data;
if ((rxq->flags & SFC_RXQ_RSS_HASH) == 0)
return;
mbuf_data = rte_pktmbuf_mtod(m, uint8_t *);
if (flags & (EFX_PKT_IPV4 | EFX_PKT_IPV6)) {
m->hash.rss = efx_pseudo_hdr_hash_get(rxq->common,
EFX_RX_HASHALG_TOEPLITZ,
mbuf_data);
m->ol_flags |= PKT_RX_RSS_HASH;
}
#endif
}
uint16_t
sfc_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
{
@ -231,7 +253,6 @@ sfc_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
seg_len = rxd->size - prefix_size;
}
m->data_off += prefix_size;
rte_pktmbuf_data_len(m) = seg_len;
rte_pktmbuf_pkt_len(m) = seg_len;
@ -261,6 +282,14 @@ sfc_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
m->ol_flags = sfc_rx_desc_flags_to_offload_flags(desc_flags);
m->packet_type = sfc_rx_desc_flags_to_packet_type(desc_flags);
/*
* Extract RSS hash from the packet prefix and
* set the corresponding field (if needed and possible)
*/
sfc_rx_set_rss_hash(rxq, desc_flags, m);
m->data_off += prefix_size;
*rx_pkts++ = m;
done_pkts++;
continue;