cryptodev: add function to check queue pair status

This patch adds function that can check if queue pair
was already setup. This may be useful when dealing with
multi process approach in cryptodev.

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>

lib/librte_cryptodev/rte_cryptodev.c

@@ -1079,6 +1079,35 @@ rte_cryptodev_close(uint8_t dev_id)
 	return 0;
 }
 
+int
+rte_cryptodev_get_qp_status(uint8_t dev_id, uint16_t queue_pair_id)
+{
+	struct rte_cryptodev *dev;
+
+	if (!rte_cryptodev_pmd_is_valid_dev(dev_id)) {
+		CDEV_LOG_ERR("Invalid dev_id=%" PRIu8, dev_id);
+		return -EINVAL;
+	}
+
+	dev = &rte_crypto_devices[dev_id];
+	if (queue_pair_id >= dev->data->nb_queue_pairs) {
+		CDEV_LOG_ERR("Invalid queue_pair_id=%d", queue_pair_id);
+		return -EINVAL;
+	}
+	void **qps = dev->data->queue_pairs;
+
+	if (qps[queue_pair_id])	{
+		CDEV_LOG_DEBUG("qp %d on dev %d is initialised",
+			queue_pair_id, dev_id);
+		return 1;
+	}
+
+	CDEV_LOG_DEBUG("qp %d on dev %d is not initialised",
+		queue_pair_id, dev_id);
+
+	return 0;
+}
+
 int
 rte_cryptodev_queue_pair_setup(uint8_t dev_id, uint16_t queue_pair_id,
 		const struct rte_cryptodev_qp_conf *qp_conf, int socket_id)

lib/librte_cryptodev/rte_cryptodev.h

@@ -726,6 +726,23 @@ extern int
 rte_cryptodev_queue_pair_setup(uint8_t dev_id, uint16_t queue_pair_id,
 		const struct rte_cryptodev_qp_conf *qp_conf, int socket_id);
 
+/**
+ * Get the status of queue pairs setup on a specific crypto device
+ *
+ * @param	dev_id		Crypto device identifier.
+ * @param	queue_pair_id	The index of the queue pairs to set up. The
+ *				value must be in the range [0, nb_queue_pair
+ *				- 1] previously supplied to
+ *				rte_cryptodev_configure().
+ * @return
+ *   - 0: qp was not configured
+ *	 - 1: qp was configured
+ *	 - -EINVAL: device was not configured
+ */
+__rte_experimental
+int
+rte_cryptodev_get_qp_status(uint8_t dev_id, uint16_t queue_pair_id);
+
 /**
  * Get the number of queue pairs on a specific crypto device
  *

lib/librte_cryptodev/rte_cryptodev_version.map

@@ -103,4 +103,7 @@ EXPERIMENTAL {
 	__rte_cryptodev_trace_asym_session_clear;
 	__rte_cryptodev_trace_dequeue_burst;
 	__rte_cryptodev_trace_enqueue_burst;
+
+	# added in 20.08
+	rte_cryptodev_get_qp_status;
 };