[PATCH v3 1/2] ethdev: define a function to get eth dev structure

[Kumara Parameshwaran <kumaraparamesh92@gmail.com>]

From: Kumara Parameshwaran <kparameshwar@vmware.com>

The PMDs would need a function to access the rte_eth_devices
global array

Cc:stable@dpdk.org

Signed-off-by: Kumara Parameshwaran <kparameshwar@vmware.com>
---
 lib/ethdev/ethdev_driver.h | 18 ++++++++++++++++++
 lib/ethdev/rte_ethdev.c    | 11 +++++++++++
 lib/ethdev/version.map     |  1 +
 3 files changed, 30 insertions(+)

diff --git a/lib/ethdev/ethdev_driver.h b/lib/ethdev/ethdev_driver.h
index d95605a355..7d27781f7d 100644
--- a/lib/ethdev/ethdev_driver.h
+++ b/lib/ethdev/ethdev_driver.h
@@ -1629,6 +1629,24 @@ rte_eth_hairpin_queue_peer_bind(uint16_t cur_port, uint16_t cur_queue,
 				struct rte_hairpin_peer_info *peer_info,
 				uint32_t direction);
 
+/**
+ * @internal
+ * Get rte_eth_dev from device name. The device name should be specified
+ * as below:
+ * - PCIe address (Domain:Bus:Device.Function), for example- 0000:2:00.0
+ * - SoC device name, for example- fsl-gmac0
+ * - vdev dpdk name, for example- net_[pcap0|null0|tap0]
+ *
+ * @param name
+ *  pci address or name of the device
+ * @return
+ *   - rte_eth_dev if successful
+ *   - NULL on failure
+ */
+__rte_internal
+struct rte_eth_dev*
+rte_eth_dev_get_by_name(const char *name);
+
 /**
  * @internal
  * Reset the current queue state and configuration to disconnect (unbind) it
diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index a1d475a292..968475d107 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -894,6 +894,17 @@ rte_eth_dev_get_port_by_name(const char *name, uint16_t *port_id)
 	return -ENODEV;
 }
 
+struct rte_eth_dev *
+rte_eth_dev_get_by_name(const char *name)
+{
+	uint16_t pid;
+
+	if (rte_eth_dev_get_port_by_name(name, &pid))
+		return NULL;
+
+	return &rte_eth_devices[pid];
+}
+
 static int
 eth_err(uint16_t port_id, int ret)
 {
diff --git a/lib/ethdev/version.map b/lib/ethdev/version.map
index c2fb0669a4..1f7359c846 100644
--- a/lib/ethdev/version.map
+++ b/lib/ethdev/version.map
@@ -267,6 +267,7 @@ INTERNAL {
 	rte_eth_dev_callback_process;
 	rte_eth_dev_create;
 	rte_eth_dev_destroy;
+	rte_eth_dev_get_by_name;
 	rte_eth_dev_is_rx_hairpin_queue;
 	rte_eth_dev_is_tx_hairpin_queue;
 	rte_eth_dev_probing_finish;
-- 
2.17.1