aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/crypto/null/null_crypto_pmd.c
blob: 023450a3119a9eb63a042580b640f583b06daedb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
/*-
 *   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_vdev.h>
#include <rte_malloc.h>

#include "null_crypto_pmd_private.h"

/** 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, NULL);
	qp->qp_stats.dequeued_count += nb_dequeued;

	return nb_dequeued;
}

static int cryptodev_null_remove(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;
	struct null_crypto_private *internals;

	if (init_params->name[0] == '\0')
		snprintf(init_params->name, sizeof(init_params->name),
				"%s", name);

	dev = rte_cryptodev_pmd_virtual_dev_init(init_params->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 |
			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;

init_error:
	NULL_CRYPTO_LOG_ERR("driver %s: cryptodev_null_create failed",
			init_params->name);
	cryptodev_null_remove(init_params->name);

	return -EFAULT;
}

/** Initialise null crypto device */
static int
cryptodev_null_probe(struct rte_vdev_device *dev)
{
	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(),
		{0}
	};
	const char *name;

	name = rte_vdev_device_name(dev);
	if (name == NULL)
		return -EINVAL;

	RTE_LOG(INFO, PMD, "Initialising %s on NUMA node %d\n",
		name, init_params.socket_id);
	if (init_params.name[0] != '\0')
		RTE_LOG(INFO, PMD, "  User defined name = %s\n",
			init_params.name);
	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_remove(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 int
cryptodev_null_remove_dev(struct rte_vdev_device *dev)
{
	return cryptodev_null_remove(rte_vdev_device_name(dev));
}

static struct rte_vdev_driver cryptodev_null_pmd_drv = {
	.probe = cryptodev_null_probe,
	.remove = cryptodev_null_remove_dev,
};

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>");