[RFC 3/3] net/mlx5: add external Rx queue

[<michaelba@nvidia.com>]

From: Michael Baum <michaelba@nvidia.com>

Add API to map and unmap HW queue id to rte_flow queue id.

Signed-off-by: Michael Baum <michaelba@nvidia.com>
---
 drivers/net/mlx5/mlx5_rx.h      |  6 +++++
 drivers/net/mlx5/rte_pmd_mlx5.h | 45 +++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rx.h b/drivers/net/mlx5/mlx5_rx.h
index adb759c235..832f66004a 100644
--- a/drivers/net/mlx5/mlx5_rx.h
+++ b/drivers/net/mlx5/mlx5_rx.h
@@ -182,6 +182,12 @@ struct mlx5_rxq_priv {
 	uint32_t hairpin_status; /* Hairpin binding status. */
 };
 
+/* External RX queue descriptor. */
+struct mlx5_external_rxq {
+	uint32_t hw_id; /* Queue index in the Hardware. */
+	uint32_t refcnt; /* Reference counter. */
+};
+
 /* mlx5_rxq.c */
 
 extern uint8_t rss_hash_default_key[];
diff --git a/drivers/net/mlx5/rte_pmd_mlx5.h b/drivers/net/mlx5/rte_pmd_mlx5.h
index e531e527b6..12e9f8d604 100644
--- a/drivers/net/mlx5/rte_pmd_mlx5.h
+++ b/drivers/net/mlx5/rte_pmd_mlx5.h
@@ -57,4 +57,49 @@ int rte_pmd_mlx5_get_dyn_flag_names(char *names[], unsigned int n);
 __rte_experimental
 int rte_pmd_mlx5_sync_flow(uint16_t port_id, uint32_t domains);
 
+/**
+ * Minimum of
+ */
+#define MLX5_EXTERNAL_RX_QUEUE_ID_MIN (UINT16_MAX - 1024)
+
+/**
+ *
+ *
+ * @param[in] port_id
+ *   The port identifier of the Ethernet device.
+ * @param[in] dpdk_idx
+ *   Queue index in rte_flow.
+ * @param[in] hw_idx
+ *   Queue index in hardware.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ *   Possible values for rte_errno:
+ *   - ENOMEM - allocation failure.
+ *   - EEXIST - a mapping with the same rte_flow index already exists.
+ *   - EINVAL - invalid rte_flow index, out of range.
+ *   - ENODEV - there is no Ethernet device for this port id.
+ *   - ENOTSUP - the port doesn't support external Rx.
+ */
+int rte_pmd_mlx5_external_rx_queue_id_map(uint16_t port_id, uint16_t dpdk_idx,
+					  uint32_t hw_idx);
+
+/**
+ *
+ *
+ * @param[in] port_id
+ *   The port identifier of the Ethernet device.
+ * @param[in] dpdk_idx
+ *   Queue index in rte_flow.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ *   Possible values for rte_errno:
+ *   - EINVAL - invalid index, out of range or doesn't exist.
+ *   - ENODEV - there is no Ethernet device for this port id.
+ *   - ENOTSUP - the port doesn't support external Rx.
+ *
+ */
+int rte_pmd_mlx5_external_rx_queue_id_unmap(uint16_t port_id, uint16_t idx);
+
 #endif
-- 
2.25.1