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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016-2017 Intel Corporation
*/
#include <rte_common.h>
#include <rte_cryptodev_pmd.h>
#include <rte_bus_vdev.h>
#include <rte_malloc.h>
#include "null_crypto_pmd_private.h"
static uint8_t cryptodev_driver_id;
/** verify and set session parameters */
int
null_crypto_set_session_parameters(
struct null_crypto_session *sess __rte_unused,
const struct rte_crypto_sym_xform *xform)
{
if (xform == NULL) {
return -EINVAL;
} else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
xform->next == NULL) {
/* Authentication Only */
if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL)
return 0;
} else if (xform->type == RTE_CRYPTO_SYM_XFORM_AUTH &&
xform->next->type == RTE_CRYPTO_SYM_XFORM_CIPHER) {
/* Authentication then Cipher */
if (xform->auth.algo == RTE_CRYPTO_AUTH_NULL &&
xform->next->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
return 0;
} else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
xform->next == NULL) {
/* Cipher Only */
if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL)
return 0;
} else if (xform->type == RTE_CRYPTO_SYM_XFORM_CIPHER &&
xform->next->type == RTE_CRYPTO_SYM_XFORM_AUTH) {
/* Cipher then Authentication */
if (xform->cipher.algo == RTE_CRYPTO_CIPHER_NULL &&
xform->next->auth.algo == RTE_CRYPTO_AUTH_NULL)
return 0;
}
return -ENOTSUP;
}
/** Process crypto operation for mbuf */
static int
process_op(const struct null_crypto_qp *qp, struct rte_crypto_op *op,
struct null_crypto_session *sess __rte_unused)
{
/* set status as successful by default */
op->status = RTE_CRYPTO_OP_STATUS_SUCCESS;
/* Free session if a session-less crypto op. */
if (op->sess_type == RTE_CRYPTO_OP_SESSIONLESS) {
memset(op->sym->session, 0,
sizeof(struct null_crypto_session));
rte_cryptodev_sym_session_free(op->sym->session);
op->sym->session = NULL;
}
/*
* if crypto session and operation are valid just enqueue the packet
* in the processed ring
*/
return rte_ring_enqueue(qp->processed_pkts, (void *)op);
}
static struct null_crypto_session *
get_session(struct null_crypto_qp *qp, struct rte_crypto_op *op)
{
struct null_crypto_session *sess = NULL;
struct rte_crypto_sym_op *sym_op = op->sym;
if (op->sess_type == RTE_CRYPTO_OP_WITH_SESSION) {
if (likely(sym_op->session != NULL))
sess = (struct null_crypto_session *)
get_session_private_data(
sym_op->session, cryptodev_driver_id);
} else {
void *_sess = NULL;
void *_sess_private_data = NULL;
if (rte_mempool_get(qp->sess_mp, (void **)&_sess))
return NULL;
if (rte_mempool_get(qp->sess_mp, (void **)&_sess_private_data))
return NULL;
sess = (struct null_crypto_session *)_sess_private_data;
if (unlikely(null_crypto_set_session_parameters(sess,
sym_op->xform) != 0)) {
rte_mempool_put(qp->sess_mp, _sess);
rte_mempool_put(qp->sess_mp, _sess_private_data);
sess = NULL;
}
sym_op->session = (struct rte_cryptodev_sym_session *)_sess;
set_session_private_data(sym_op->session, cryptodev_driver_id,
_sess_private_data);
}
return sess;
}
/** Enqueue burst */
static uint16_t
null_crypto_pmd_enqueue_burst(void *queue_pair, struct rte_crypto_op **ops,
uint16_t nb_ops)
{
struct null_crypto_session *sess;
struct null_crypto_qp *qp = queue_pair;
int i, retval;
for (i = 0; i < nb_ops; i++) {
sess = get_session(qp, ops[i]);
if (unlikely(sess == NULL))
goto enqueue_err;
retval = process_op(qp, ops[i], sess);
if (unlikely(retval < 0))
goto enqueue_err;
}
qp->qp_stats.enqueued_count += i;
return i;
enqueue_err:
if (ops[i])
ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
qp->qp_stats.enqueue_err_count++;
return i;
}
/** Dequeue burst */
static uint16_t
null_crypto_pmd_dequeue_burst(void *queue_pair, struct rte_crypto_op **ops,
uint16_t nb_ops)
{
struct null_crypto_qp *qp = queue_pair;
unsigned nb_dequeued;
nb_dequeued = rte_ring_dequeue_burst(qp->processed_pkts,
(void **)ops, nb_ops, NULL);
qp->qp_stats.dequeued_count += nb_dequeued;
return nb_dequeued;
}
/** Create crypto device */
static int
cryptodev_null_create(const char *name,
struct rte_vdev_device *vdev,
struct rte_cryptodev_pmd_init_params *init_params)
{
struct rte_cryptodev *dev;
struct null_crypto_private *internals;
dev = rte_cryptodev_pmd_create(name, &vdev->device, init_params);
if (dev == NULL) {
NULL_CRYPTO_LOG_ERR("failed to create cryptodev vdev");
return -EFAULT;
}
dev->driver_id = cryptodev_driver_id;
dev->dev_ops = null_crypto_pmd_ops;
/* register rx/tx burst functions for data path */
dev->dequeue_burst = null_crypto_pmd_dequeue_burst;
dev->enqueue_burst = null_crypto_pmd_enqueue_burst;
dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
internals = dev->data->dev_private;
internals->max_nb_qpairs = init_params->max_nb_queue_pairs;
internals->max_nb_sessions = init_params->max_nb_sessions;
return 0;
}
/** Initialise null crypto device */
static int
cryptodev_null_probe(struct rte_vdev_device *dev)
{
struct rte_cryptodev_pmd_init_params init_params = {
"",
sizeof(struct null_crypto_private),
rte_socket_id(),
RTE_CRYPTODEV_PMD_DEFAULT_MAX_NB_QUEUE_PAIRS,
RTE_CRYPTODEV_PMD_DEFAULT_MAX_NB_SESSIONS
};
const char *name, *args;
int retval;
name = rte_vdev_device_name(dev);
if (name == NULL)
return -EINVAL;
args = rte_vdev_device_args(dev);
retval = rte_cryptodev_pmd_parse_input_args(&init_params, args);
if (retval) {
RTE_LOG(ERR, PMD,
"Failed to parse initialisation arguments[%s]\n", args);
return -EINVAL;
}
return cryptodev_null_create(name, dev, &init_params);
}
static int
cryptodev_null_remove_dev(struct rte_vdev_device *vdev)
{
struct rte_cryptodev *cryptodev;
const char *name;
name = rte_vdev_device_name(vdev);
if (name == NULL)
return -EINVAL;
cryptodev = rte_cryptodev_pmd_get_named_dev(name);
if (cryptodev == NULL)
return -ENODEV;
return rte_cryptodev_pmd_destroy(cryptodev);
}
static struct rte_vdev_driver cryptodev_null_pmd_drv = {
.probe = cryptodev_null_probe,
.remove = cryptodev_null_remove_dev,
};
static struct cryptodev_driver null_crypto_drv;
RTE_PMD_REGISTER_VDEV(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd_drv);
RTE_PMD_REGISTER_ALIAS(CRYPTODEV_NAME_NULL_PMD, cryptodev_null_pmd);
RTE_PMD_REGISTER_PARAM_STRING(CRYPTODEV_NAME_NULL_PMD,
"max_nb_queue_pairs=<int> "
"max_nb_sessions=<int> "
"socket_id=<int>");
RTE_PMD_REGISTER_CRYPTO_DRIVER(null_crypto_drv, cryptodev_null_pmd_drv,
cryptodev_driver_id);
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