From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Rybchenko Subject: [PATCH 26/31] net/sfc: support RSS hash offload Date: Fri, 2 Dec 2016 07:44:46 +0000 Message-ID: <1480664691-26561-27-git-send-email-arybchenko@solarflare.com> References: <1480664691-26561-1-git-send-email-arybchenko@solarflare.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Ivan Malov To: Return-path: Received: from nbfkord-smmo02.seg.att.com (nbfkord-smmo02.seg.att.com [209.65.160.78]) by dpdk.org (Postfix) with ESMTP id 26A6BFA4F for ; Fri, 2 Dec 2016 08:45:25 +0100 (CET) In-Reply-To: <1480664691-26561-1-git-send-email-arybchenko@solarflare.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Ivan Malov Extract RSS hash provided by the HW in the prefix and put it to mbuf. Reviewed-by: Andrew Lee Reviewed-by: Robert Stonehouse Signed-off-by: Ivan Malov Signed-off-by: Andrew Rybchenko --- 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