From: Ivan Malov <ivan.ma...@oktetlabs.ru>
Extract RSS hash provided by the HW in the prefix and put it to mbuf.
Reviewed-by: Andrew Lee <a...@solarflare.com>
Reviewed-by: Robert Stonehouse <rstoneho...@solarflare.com>
Signed-off-by: Ivan Malov <ivan.ma...@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybche...@solarflare.com>
---
doc/guides/nics/features/sfc_efx.ini | 1 +
doc/guides/nics/sfc_efx.rst | 2 ++
drivers/net/sfc/sfc_rx.c | 31 ++++++++++++++++++++++++++++++-
3 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/doc/guides/nics/features/sfc_efx.ini
b/doc/guides/nics/features/sfc_efx.ini
index e7a1143..debea27 100644
--- a/doc/guides/nics/features/sfc_efx.ini
+++ b/doc/guides/nics/features/sfc_efx.ini
@@ -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
diff --git a/doc/guides/nics/sfc_efx.rst b/doc/guides/nics/sfc_efx.rst
index 4f674c0..64489de 100644
--- a/doc/guides/nics/sfc_efx.rst
+++ b/doc/guides/nics/sfc_efx.rst
@@ -68,6 +68,8 @@ 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
diff --git a/drivers/net/sfc/sfc_rx.c b/drivers/net/sfc/sfc_rx.c
index f0fe1b8..1e254a8 100644
--- a/drivers/net/sfc/sfc_rx.c
+++ b/drivers/net/sfc/sfc_rx.c
@@ -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;
--
2.5.5
