crypto/ipsec_mb: optimize allocation in session

[ upstream commit db7dc9070bf42593e3fca5f2f47ac0344e1b5cb6 ]

When configuring the session, use the queue pair mb_mgr that was already
allocated if possible. If this doesn't exist, then allocate a new mb_mgr.

This reduces unnecessary cycles creating an mb_mgr for every session
configured.

Fixes: c75542a ("crypto/ipsec_mb: introduce IPsec_mb framework")

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Kai Ji <kai.ji@intel.com>

drivers/crypto/ipsec_mb/ipsec_mb_ops.c

@@ -319,15 +319,22 @@ ipsec_mb_sym_session_configure(
 	struct ipsec_mb_dev_private *internals = dev->data->dev_private;
 	struct ipsec_mb_internals *pmd_data =
 		&ipsec_mb_pmds[internals->pmd_type];
-	IMB_MGR *mb_mgr = alloc_init_mb_mgr();
+	struct ipsec_mb_qp *qp = dev->data->queue_pairs[0];
+	IMB_MGR *mb_mgr;
 	int ret = 0;
 
+	if (qp != NULL)
+		mb_mgr = qp->mb_mgr;
+	else
+		mb_mgr = alloc_init_mb_mgr();
+
 	if (!mb_mgr)
 		return -ENOMEM;
 
 	if (unlikely(sess == NULL)) {
 		IPSEC_MB_LOG(ERR, "invalid session struct");
-		free_mb_mgr(mb_mgr);
+		if (qp == NULL)
+			free_mb_mgr(mb_mgr);
 		return -EINVAL;
 	}
 
@@ -343,13 +350,15 @@ ipsec_mb_sym_session_configure(
 
 		/* Return session to mempool */
 		rte_mempool_put(mempool, sess_private_data);
-		free_mb_mgr(mb_mgr);
+		if (qp == NULL)
+			free_mb_mgr(mb_mgr);
 		return ret;
 	}
 
 	set_sym_session_private_data(sess, dev->driver_id, sess_private_data);
 
-	free_mb_mgr(mb_mgr);
+	if (qp == NULL)
+		free_mb_mgr(mb_mgr);
 	return 0;
 }