From: Simei Su <simei.su@intel.com>
Date: Tue, 15 Oct 2019 15:09:48 +0000 (+0800)
Subject: ethdev: extend RSS offload types
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d3ae8c44b8107bc66fdb37e26108bf2bd302cd86;p=dpdk.git

ethdev: extend RSS offload types

This patch reserves several bits as input set selection from the
high end of the 64 bits. It is combined with exisiting ETH_RSS_*
to represent RSS types. This patch also checks the simultaneous
use of SRC_ONLY and DST_ONLY of the same level.

Signed-off-by: Simei Su <simei.su@intel.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Ori Kam <orika@mellanox.com>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
---

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 750bc9d023..acc4b748d3 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1288,6 +1288,9 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 		goto rollback;
 	}
 
+	dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf =
+		rte_eth_rss_hf_refine(dev_conf->rx_adv_conf.rss_conf.rss_hf);
+
 	/* Check that device supports requested rss hash functions. */
 	if ((dev_info.flow_type_rss_offloads |
 	     dev_conf->rx_adv_conf.rss_conf.rss_hf) !=
@@ -3131,6 +3134,8 @@ rte_eth_dev_rss_hash_update(uint16_t port_id,
 	if (ret != 0)
 		return ret;
 
+	rss_conf->rss_hf = rte_eth_rss_hf_refine(rss_conf->rss_hf);
+
 	dev = &rte_eth_devices[port_id];
 	if ((dev_info.flow_type_rss_offloads | rss_conf->rss_hf) !=
 	    dev_info.flow_type_rss_offloads) {
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index 9bd8d4b66d..33c528bb8e 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -507,6 +507,42 @@ struct rte_eth_rss_conf {
 #define ETH_RSS_NVGRE              (1ULL << 21)
 #define ETH_RSS_GTPU               (1ULL << 23)
 
+/*
+ * We use the following macros to combine with above ETH_RSS_* for
+ * more specific input set selection. These bits are defined starting
+ * from the high end of the 64 bits.
+ * Note: If we use above ETH_RSS_* without SRC/DST_ONLY, it represents
+ * both SRC and DST are taken into account. If SRC_ONLY and DST_ONLY of
+ * the same level are used simultaneously, it is the same case as none of
+ * them are added.
+ */
+#define ETH_RSS_L3_SRC_ONLY        (1ULL << 63)
+#define ETH_RSS_L3_DST_ONLY        (1ULL << 62)
+#define ETH_RSS_L4_SRC_ONLY        (1ULL << 61)
+#define ETH_RSS_L4_DST_ONLY        (1ULL << 60)
+
+/**
+ * For input set change of hash filter, if SRC_ONLY and DST_ONLY of
+ * the same level are used simultaneously, it is the same case as
+ * none of them are added.
+ *
+ * @param rss_hf
+ *   RSS types with SRC/DST_ONLY.
+ * @return
+ *   RSS types.
+ */
+static inline uint64_t
+rte_eth_rss_hf_refine(uint64_t rss_hf)
+{
+	if ((rss_hf & ETH_RSS_L3_SRC_ONLY) && (rss_hf & ETH_RSS_L3_DST_ONLY))
+		rss_hf &= ~(ETH_RSS_L3_SRC_ONLY | ETH_RSS_L3_DST_ONLY);
+
+	if ((rss_hf & ETH_RSS_L4_SRC_ONLY) && (rss_hf & ETH_RSS_L4_DST_ONLY))
+		rss_hf &= ~(ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY);
+
+	return rss_hf;
+}
+
 #define ETH_RSS_IP ( \
 	ETH_RSS_IPV4 | \
 	ETH_RSS_FRAG_IPV4 | \