cryptodev: add function to retrieve device name

Currently, in order to get the name of a crypto device,
a user needs to access to it using the crypto device structure.

It is a better practise to have a function to retrieve this
name, given a device id.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>

lib/librte_cryptodev/rte_cryptodev.c

@@ -1381,6 +1381,17 @@ rte_cryptodev_driver_id_get(const char *name)
 	return -1;
 }
 
+const char *
+rte_cryptodev_name_get(uint8_t dev_id)
+{
+	struct rte_cryptodev *dev = rte_cryptodev_pmd_get_dev(dev_id);
+
+	if (dev == NULL)
+		return NULL;
+
+	return dev->data->name;
+}
+
 const char *
 rte_cryptodev_driver_name_get(uint8_t driver_id)
 {

lib/librte_cryptodev/rte_cryptodev.h

@@ -462,6 +462,19 @@ rte_cryptodev_create_vdev(const char *name, const char *args);
 extern int
 rte_cryptodev_get_dev_id(const char *name);
 
+/**
+ * Get the crypto device name given a device identifier.
+ *
+ * @param dev_id
+ *   The identifier of the device
+ *
+ * @return
+ *   - Returns crypto device name.
+ *   - Returns NULL if crypto device is not present.
+ */
+extern const char *
+rte_cryptodev_name_get(uint8_t dev_id);
+
 /**
  * Get the total number of crypto devices that have been successfully
  * initialised.

lib/librte_cryptodev/rte_cryptodev_version.map

@@ -79,3 +79,10 @@ DPDK_17.08 {
 	rte_crypto_aead_operation_strings;
 
 } DPDK_17.05;
+
+DPDK_17.11 {
+	global:
+
+	rte_cryptodev_name_get;
+
+} DPDK_17.08;