[dpdk-dev] [PATCH 3/3] net/cxgbe: add support to update RSS redirection table

[Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>]

Implement eth_dev_ops to manipulate RSS redirection table.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
---
 doc/guides/nics/features/cxgbe.ini |  1 +
 drivers/net/cxgbe/cxgbe_ethdev.c   | 65 ++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/doc/guides/nics/features/cxgbe.ini b/doc/guides/nics/features/cxgbe.ini
index 88f2f92b7..c03b53bd8 100644
--- a/doc/guides/nics/features/cxgbe.ini
+++ b/doc/guides/nics/features/cxgbe.ini
@@ -15,6 +15,7 @@ Promiscuous mode     = Y
 Allmulticast mode    = Y
 RSS hash             = Y
 RSS key update       = Y
+RSS reta update      = Y
 Flow control         = Y
 Flow API             = Y
 CRC offload          = Y
diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index b9993cb0b..422e190da 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -923,6 +923,69 @@ static int cxgbe_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 	return 0;
 }
 
+static int cxgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
+				     struct rte_eth_rss_reta_entry64 *reta_conf,
+				     uint16_t reta_size)
+{
+	struct port_info *pi = dev->data->dev_private;
+	struct adapter *adapter = pi->adapter;
+	u16 i, idx, shift, *rss;
+	int ret;
+
+	if (!(adapter->flags & FULL_INIT_DONE))
+		return -ENOMEM;
+
+	if (!reta_size || reta_size > pi->rss_size)
+		return -EINVAL;
+
+	rss = rte_calloc(NULL, pi->rss_size, sizeof(u16), 0);
+	if (!rss)
+		return -ENOMEM;
+
+	rte_memcpy(rss, pi->rss, pi->rss_size * sizeof(u16));
+	for (i = 0; i < reta_size; i++) {
+		idx = i / RTE_RETA_GROUP_SIZE;
+		shift = i % RTE_RETA_GROUP_SIZE;
+		if (!(reta_conf[idx].mask & (1ULL << shift)))
+			continue;
+
+		rss[i] = reta_conf[idx].reta[shift];
+	}
+
+	ret = cxgbe_write_rss(pi, rss);
+	if (!ret)
+		rte_memcpy(pi->rss, rss, pi->rss_size * sizeof(u16));
+
+	rte_free(rss);
+	return ret;
+}
+
+static int cxgbe_dev_rss_reta_query(struct rte_eth_dev *dev,
+				    struct rte_eth_rss_reta_entry64 *reta_conf,
+				    uint16_t reta_size)
+{
+	struct port_info *pi = dev->data->dev_private;
+	struct adapter *adapter = pi->adapter;
+	u16 i, idx, shift;
+
+	if (!(adapter->flags & FULL_INIT_DONE))
+		return -ENOMEM;
+
+	if (!reta_size || reta_size > pi->rss_size)
+		return -EINVAL;
+
+	for (i = 0; i < reta_size; i++) {
+		idx = i / RTE_RETA_GROUP_SIZE;
+		shift = i % RTE_RETA_GROUP_SIZE;
+		if (!(reta_conf[idx].mask & (1ULL << shift)))
+			continue;
+
+		reta_conf[idx].reta[shift] = pi->rss[i];
+	}
+
+	return 0;
+}
+
 static int cxgbe_get_eeprom_length(struct rte_eth_dev *dev)
 {
 	RTE_SET_USED(dev);
@@ -1142,6 +1205,8 @@ static const struct eth_dev_ops cxgbe_eth_dev_ops = {
 	.rss_hash_update	= cxgbe_dev_rss_hash_update,
 	.rss_hash_conf_get	= cxgbe_dev_rss_hash_conf_get,
 	.mac_addr_set		= cxgbe_mac_addr_set,
+	.reta_update            = cxgbe_dev_rss_reta_update,
+	.reta_query             = cxgbe_dev_rss_reta_query,
 };
 
 /*
-- 
2.24.0