[dpdk-dev] [PATCH v3 06/14] net/mlx5: add get hairpin capabilities

[Ori Kam <orika@mellanox.com>]

This commits adds the hairpin get capabilities function.

Signed-off-by: Ori Kam <orika@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>

---
 drivers/net/mlx5/mlx5.c        |  2 ++
 drivers/net/mlx5/mlx5.h        |  3 ++-
 drivers/net/mlx5/mlx5_ethdev.c | 27 +++++++++++++++++++++++++++
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index c53a9c6..7962936 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -1028,6 +1028,7 @@ struct mlx5_dev_spawn_data {
 	.udp_tunnel_port_add  = mlx5_udp_tunnel_port_add,
 	.get_module_info = mlx5_get_module_info,
 	.get_module_eeprom = mlx5_get_module_eeprom,
+	.hairpin_cap_get = mlx5_hairpin_cap_get,
 };
 
 /* Available operations from secondary process. */
@@ -1090,6 +1091,7 @@ struct mlx5_dev_spawn_data {
 	.is_removed = mlx5_is_removed,
 	.get_module_info = mlx5_get_module_info,
 	.get_module_eeprom = mlx5_get_module_eeprom,
+	.hairpin_cap_get = mlx5_hairpin_cap_get,
 };
 
 /**
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 7ea4950..ce044b9 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -782,7 +782,8 @@ int mlx5_get_module_info(struct rte_eth_dev *dev,
 			 struct rte_eth_dev_module_info *modinfo);
 int mlx5_get_module_eeprom(struct rte_eth_dev *dev,
 			   struct rte_dev_eeprom_info *info);
-
+int mlx5_hairpin_cap_get(struct rte_eth_dev *dev,
+			 struct rte_eth_hairpin_cap *cap);
 /* mlx5_mac.c */
 
 int mlx5_get_mac(struct rte_eth_dev *dev, uint8_t (*mac)[RTE_ETHER_ADDR_LEN]);
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index f2b1752..95c70f7 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -2028,3 +2028,30 @@ int mlx5_get_module_eeprom(struct rte_eth_dev *dev,
 	rte_free(eeprom);
 	return ret;
 }
+
+/**
+ * DPDK callback to retrieve hairpin capabilities.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param[out] cap
+ *   Storage for hairpin capability data.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int mlx5_hairpin_cap_get(struct rte_eth_dev *dev,
+			 struct rte_eth_hairpin_cap *cap)
+{
+	struct mlx5_priv *priv = dev->data->dev_private;
+
+	if (priv->sh->devx == 0) {
+		rte_errno = ENOTSUP;
+		return -rte_errno;
+	}
+	cap->max_n_queues = UINT16_MAX;
+	cap->max_rx_2_tx = 1;
+	cap->max_tx_2_rx = 1;
+	cap->max_nb_desc = 8192;
+	return 0;
+}
-- 
1.8.3.1