[PATCH v3 2/2] crypto/cnxk: add sessionless asym cn20k support

[Nithinsen Kaithakadan <nkaithakadan@marvell.com>]

Add support for sessionless asymmetric operations for cn20k.

Signed-off-by: Nithinsen Kaithakadan <nkaithakadan@marvell.com>
---
 doc/guides/cryptodevs/features/cn20k.ini  |  1 +
 drivers/crypto/cnxk/cn20k_cryptodev_ops.c | 91 +++++++++++++++++++++--
 2 files changed, 87 insertions(+), 5 deletions(-)

diff --git a/doc/guides/cryptodevs/features/cn20k.ini b/doc/guides/cryptodevs/features/cn20k.ini
index 76553d190e..ff00a8a107 100644
--- a/doc/guides/cryptodevs/features/cn20k.ini
+++ b/doc/guides/cryptodevs/features/cn20k.ini
@@ -17,6 +17,7 @@ Symmetric sessionless  = Y
 RSA PRIV OP KEY EXP    = Y
 RSA PRIV OP KEY QT     = Y
 Digest encrypted       = Y
+Asymmetric sessionless = Y
 Sym raw data path API  = Y
 Inner checksum         = Y
 Rx inject              = Y
diff --git a/drivers/crypto/cnxk/cn20k_cryptodev_ops.c b/drivers/crypto/cnxk/cn20k_cryptodev_ops.c
index f94ab3750c..6ef7c5bb22 100644
--- a/drivers/crypto/cnxk/cn20k_cryptodev_ops.c
+++ b/drivers/crypto/cnxk/cn20k_cryptodev_ops.c
@@ -79,6 +79,55 @@ cn20k_cpt_sym_temp_sess_create(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op)
 	return NULL;
 }
 
+static inline struct cnxk_ae_sess *
+cn20k_cpt_asym_temp_sess_create(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op)
+{
+	struct rte_crypto_asym_op *asym_op = op->asym;
+	struct roc_cpt *roc_cpt = qp->lf.roc_cpt;
+	struct rte_cryptodev_asym_session *sess;
+	struct cnxk_ae_sess *priv;
+	struct cnxk_cpt_vf *vf;
+	union cpt_inst_w7 w7;
+	struct hw_ctx_s *hwc;
+
+	/* Create temporary session */
+	if (rte_mempool_get(qp->sess_mp, (void **)&sess) < 0)
+		return NULL;
+
+	priv = (struct cnxk_ae_sess *)sess;
+	if (cnxk_ae_fill_session_parameters(priv, asym_op->xform))
+		goto sess_put;
+
+	priv->lf = &qp->lf;
+
+	if (roc_errata_cpt_hang_on_mixed_ctx_val()) {
+		hwc = &priv->hw_ctx;
+		hwc->w0.s.aop_valid = 1;
+		hwc->w0.s.ctx_hdr_size = 0;
+		hwc->w0.s.ctx_size = 1;
+		hwc->w0.s.ctx_push_size = 1;
+
+		w7.s.ctx_val = 1;
+		w7.s.cptr = (uint64_t)hwc;
+	}
+
+	w7.u64 = 0;
+	w7.s.egrp = roc_cpt->eng_grp[CPT_ENG_TYPE_AE];
+
+	vf = container_of(roc_cpt, struct cnxk_cpt_vf, cpt);
+	priv->cpt_inst_w7 = w7.u64;
+	priv->cnxk_fpm_iova = vf->cnxk_fpm_iova;
+	priv->ec_grp = vf->ec_grp;
+
+	asym_op->session = sess;
+
+	return priv;
+
+sess_put:
+	rte_mempool_put(qp->sess_mp, sess);
+	return NULL;
+}
+
 static __rte_always_inline int __rte_hot
 cpt_sec_ipsec_inst_fill(struct cnxk_cpt_qp *qp, struct rte_crypto_op *op,
 			struct cn20k_sec_session *sess, struct cpt_inst_s *inst,
@@ -178,7 +227,6 @@ cn20k_cpt_fill_inst(struct cnxk_cpt_qp *qp, struct rte_crypto_op *ops[], struct
 			w7 = sess->cpt_inst_w7;
 		}
 	} else if (op->type == RTE_CRYPTO_OP_TYPE_ASYMMETRIC) {
-
 		if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
 			asym_op = op->asym;
 			ae_sess = (struct cnxk_ae_sess *)asym_op->session;
@@ -187,9 +235,22 @@ cn20k_cpt_fill_inst(struct cnxk_cpt_qp *qp, struct rte_crypto_op *ops[], struct
 				return 0;
 			w7 = ae_sess->cpt_inst_w7;
 		} else {
-			plt_dp_err("Not supported Asym op without session");
-			return 0;
+			ae_sess = cn20k_cpt_asym_temp_sess_create(qp, op);
+			if (unlikely(ae_sess == NULL)) {
+				plt_dp_err("Could not create temp session");
+				return 0;
+			}
+
+			ret = cnxk_ae_enqueue(qp, op, infl_req, &inst[0], ae_sess);
+			if (unlikely(ret)) {
+				cnxk_ae_session_clear(NULL,
+						      (struct rte_cryptodev_asym_session *)ae_sess);
+				rte_mempool_put(qp->sess_mp, ae_sess);
+				return 0;
+			}
+			w7 = ae_sess->cpt_inst_w7;
 		}
+
 	} else {
 		plt_dp_err("Unsupported op type");
 		return 0;
@@ -395,8 +456,23 @@ cn20k_ca_meta_info_extract(struct rte_crypto_op *op, struct cnxk_cpt_qp **qp, ui
 			priv = (struct cnxk_ae_sess *)op->asym->session;
 			*qp = priv->qp;
 			*w2 = priv->cpt_inst_w2;
-		} else
-			return -EINVAL;
+		} else {
+			union rte_event_crypto_metadata *ec_mdata;
+			struct rte_event *rsp_info;
+			uint8_t cdev_id;
+			uint16_t qp_id;
+
+			if (unlikely(op->private_data_offset == 0))
+				return -EINVAL;
+			ec_mdata = (union rte_event_crypto_metadata *)((uint8_t *)op +
+								       op->private_data_offset);
+			rsp_info = &ec_mdata->response_info;
+			cdev_id = ec_mdata->request_info.cdev_id;
+			qp_id = ec_mdata->request_info.queue_pair_id;
+			*qp = rte_cryptodevs[cdev_id].data->queue_pairs[qp_id];
+			*w2 = CNXK_CPT_INST_W2((RTE_EVENT_TYPE_CRYPTODEV << 28) | rsp_info->flow_id,
+					       rsp_info->sched_type, rsp_info->queue_id, 0);
+		}
 	} else
 		return -EINVAL;
 
@@ -1083,6 +1159,11 @@ cn20k_cpt_dequeue_post_process(struct cnxk_cpt_qp *qp, struct rte_crypto_op *cop
 			rte_mempool_put(qp->sess_mp, cop->sym->session);
 			cop->sym->session = NULL;
 		}
+		if (cop->type == RTE_CRYPTO_OP_TYPE_ASYMMETRIC) {
+			cnxk_ae_session_clear(NULL, cop->asym->session);
+			rte_mempool_put(qp->sess_mp, cop->asym->session);
+			cop->asym->session = NULL;
+		}
 	}
 }
 
-- 
2.48.1