[dpdk-dev] [PATCH 1/3] ethdev: add helper functions to get eth_dev and dev private data

[Ferruh Yigit <ferruh.yigit@intel.com>]

This is to provide abstraction and reduce global variable access.

Global variable rte_eth_devices kept exported to not break ABI.

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 lib/librte_ether/rte_ethdev.h | 44 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 6afb5a9..7209b83 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -3881,6 +3881,50 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *eth_dev, const char *name,
 			 uint16_t queue_id, size_t size,
 			 unsigned align, int socket_id);
 
+/**
+ * Return rte_eth_dev by port id
+ *
+ * This is to abstract device access and limit global variable access.
+ *
+ * @param port_id
+ *   port_id of the device to return.
+ */
+static inline struct rte_eth_dev *
+rte_eth_by_port(uint16_t port_id)
+{
+	return &rte_eth_devices[port_id];
+}
+
+/**
+ * Return rte_eth_dev private data structure by port id
+ *
+ * This is to abstract device private data access and
+ * limit global variable access.
+ *
+ * @param port_id
+ *   port_id of the device to return.
+ */
+static inline void *
+rte_eth_private_by_port(uint16_t port_id)
+{
+	return rte_eth_devices[port_id].data->dev_private;
+}
+
+/**
+ * Return rte_eth_dev private data structure by rte_eth_dev
+ *
+ * This is helper function to access device private data, also
+ * provides some abstraction on how private data kept.
+ *
+ * @param dev
+ *   rte_eth_dev
+ */
+static inline void *
+rte_eth_private_by_dev(struct rte_eth_dev *dev)
+{
+	return dev->data->dev_private;
+}
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.5.0