1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/crypto/null/null_crypto_pmd.c b/drivers/crypto/null/null_crypto_pmd.c
new file mode 100644
index 00000000..bdaf13ca
--- /dev/null
+++ b/drivers/crypto/null/null_crypto_pmd.c
@@ -0,0 +1,278 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_common.h>
+#include <rte_config.h>
+#include <rte_cryptodev_pmd.h>
+#include <rte_dev.h>
+#include <rte_malloc.h>
+
+#include "null_crypto_pmd_private.h"
+
+/**
+ * Global static parameter used to create a unique name for each crypto device.
+ */
+static unsigned unique_name_id;
+
+static inline int
+create_unique_device_name(char *name, size_t size)
+{
+	int ret;
+
+	if (name == NULL)
+		return -EINVAL;
+
+	ret = snprintf(name, size, "%s_%u", CRYPTODEV_NAME_NULL_PMD,
+			unique_name_id++);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+
+/** 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 -1;
+	} 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 -1;
+}
+
+/** 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;
+
+	/*
+	 * 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_sym_op *op)
+{
+	struct null_crypto_session *sess;
+
+	if (op->sess_type == RTE_CRYPTO_SYM_OP_WITH_SESSION) {
+		if (unlikely(op->session == NULL ||
+			     op->session->dev_type != RTE_CRYPTODEV_NULL_PMD))
+			return NULL;
+
+		sess = (struct null_crypto_session *)op->session->_private;
+	} else  {
+		struct rte_cryptodev_session *c_sess = NULL;
+
+		if (rte_mempool_get(qp->sess_mp, (void **)&c_sess))
+			return NULL;
+
+		sess = (struct null_crypto_session *)c_sess->_private;
+
+		if (null_crypto_set_session_parameters(sess, op->xform)	!= 0)
+			return NULL;
+	}
+
+	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]->sym);
+		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);
+	qp->qp_stats.dequeued_count += nb_dequeued;
+
+	return nb_dequeued;
+}
+
+static int cryptodev_null_uninit(const char *name);
+
+/** Create crypto device */
+static int
+cryptodev_null_create(const char *name,
+		struct rte_crypto_vdev_init_params *init_params)
+{
+	struct rte_cryptodev *dev;
+	char crypto_dev_name[RTE_CRYPTODEV_NAME_MAX_LEN];
+	struct null_crypto_private *internals;
+
+	/* create a unique device name */
+	if (create_unique_device_name(crypto_dev_name,
+			RTE_CRYPTODEV_NAME_MAX_LEN) != 0) {
+		NULL_CRYPTO_LOG_ERR("failed to create unique cryptodev name");
+		return -EINVAL;
+	}
+
+	dev = rte_cryptodev_pmd_virtual_dev_init(crypto_dev_name,
+			sizeof(struct null_crypto_private),
+			init_params->socket_id);
+	if (dev == NULL) {
+		NULL_CRYPTO_LOG_ERR("failed to create cryptodev vdev");
+		goto init_error;
+	}
+
+	dev->dev_type = RTE_CRYPTODEV_NULL_PMD;
+	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;
+
+	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;
+
+init_error:
+	NULL_CRYPTO_LOG_ERR("driver %s: cryptodev_null_create failed", name);
+	cryptodev_null_uninit(crypto_dev_name);
+
+	return -EFAULT;
+}
+
+/** Initialise null crypto device */
+static int
+cryptodev_null_init(const char *name,
+		const char *input_args)
+{
+	struct rte_crypto_vdev_init_params init_params = {
+		RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_QUEUE_PAIRS,
+		RTE_CRYPTODEV_VDEV_DEFAULT_MAX_NB_SESSIONS,
+		rte_socket_id()
+	};
+
+	rte_cryptodev_parse_vdev_init_params(&init_params, input_args);
+
+	RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n", name,
+			init_params.socket_id);
+	RTE_LOG(INFO, PMD, "  Max number of queue pairs = %d\n",
+			init_params.max_nb_queue_pairs);
+	RTE_LOG(INFO, PMD, "  Max number of sessions = %d\n",
+			init_params.max_nb_sessions);
+
+	return cryptodev_null_create(name, &init_params);
+}
+
+/** Uninitialise null crypto device */
+static int
+cryptodev_null_uninit(const char *name)
+{
+	if (name == NULL)
+		return -EINVAL;
+
+	RTE_LOG(INFO, PMD, "Closing null crypto device %s on numa socket %u\n",
+			name, rte_socket_id());
+
+	return 0;
+}
+
+static struct rte_driver cryptodev_null_pmd_drv = {
+	.name = CRYPTODEV_NAME_NULL_PMD,
+	.type = PMD_VDEV,
+	.init = cryptodev_null_init,
+	.uninit = cryptodev_null_uninit
+};
+
+PMD_REGISTER_DRIVER(cryptodev_null_pmd_drv);