summaryrefslogtreecommitdiffstats
path: root/backends/cryptodev-vhost.c
blob: 572f87b3bee1f561328fd7775f668b6041c4678a (plain) (blame)
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
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
/*
 * QEMU Cryptodev backend for QEMU cipher APIs
 *
 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
 *
 * Authors:
 *    Gonglei <arei.gonglei@huawei.com>
 *    Jay Zhou <jianjay.zhou@huawei.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "qemu/osdep.h"
#include "hw/virtio/virtio-bus.h"
#include "sysemu/cryptodev-vhost.h"

#ifdef CONFIG_VHOST_CRYPTO
#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qemu/error-report.h"
#include "hw/virtio/virtio-crypto.h"
#include "sysemu/cryptodev-vhost-user.h"

uint64_t
cryptodev_vhost_get_max_queues(
                        CryptoDevBackendVhost *crypto)
{
    return crypto->dev.max_queues;
}

void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
{
    vhost_dev_cleanup(&crypto->dev);
    g_free(crypto);
}

struct CryptoDevBackendVhost *
cryptodev_vhost_init(
             CryptoDevBackendVhostOptions *options)
{
    int r;
    CryptoDevBackendVhost *crypto;
    Error *local_err = NULL;

    crypto = g_new(CryptoDevBackendVhost, 1);
    crypto->dev.max_queues = 1;
    crypto->dev.nvqs = 1;
    crypto->dev.vqs = crypto->vqs;

    crypto->cc = options->cc;

    crypto->dev.protocol_features = 0;
    crypto->backend = -1;

    /* vhost-user needs vq_index to initiate a specific queue pair */
    crypto->dev.vq_index = crypto->cc->queue_index * crypto->dev.nvqs;

    r = vhost_dev_init(&crypto->dev, options->opaque, options->backend_type, 0,
                       &local_err);
    if (r < 0) {
        error_report_err(local_err);
        goto fail;
    }

    return crypto;
fail:
    g_free(crypto);
    return NULL;
}

static int
cryptodev_vhost_start_one(CryptoDevBackendVhost *crypto,
                                  VirtIODevice *dev)
{
    int r;

    crypto->dev.nvqs = 1;
    crypto->dev.vqs = crypto->vqs;

    r = vhost_dev_enable_notifiers(&crypto->dev, dev);
    if (r < 0) {
        goto fail_notifiers;
    }

    r = vhost_dev_start(&crypto->dev, dev, false);
    if (r < 0) {
        goto fail_start;
    }

    return 0;

fail_start:
    vhost_dev_disable_notifiers(&crypto->dev, dev);
fail_notifiers:
    return r;
}

static void
cryptodev_vhost_stop_one(CryptoDevBackendVhost *crypto,
                                 VirtIODevice *dev)
{
    vhost_dev_stop(&crypto->dev, dev, false);
    vhost_dev_disable_notifiers(&crypto->dev, dev);
}

CryptoDevBackendVhost *
cryptodev_get_vhost(CryptoDevBackendClient *cc,
                            CryptoDevBackend *b,
                            uint16_t queue)
{
    CryptoDevBackendVhost *vhost_crypto = NULL;

    if (!cc) {
        return NULL;
    }

    switch (cc->type) {
#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
    case CRYPTODEV_BACKEND_TYPE_VHOST_USER:
        vhost_crypto = cryptodev_vhost_user_get_vhost(cc, b, queue);
        break;
#endif
    default:
        break;
    }

    return vhost_crypto;
}

static void
cryptodev_vhost_set_vq_index(CryptoDevBackendVhost *crypto,
                                     int vq_index)
{
    crypto->dev.vq_index = vq_index;
}

static int
vhost_set_vring_enable(CryptoDevBackendClient *cc,
                            CryptoDevBackend *b,
                            uint16_t queue, int enable)
{
    CryptoDevBackendVhost *crypto =
                       cryptodev_get_vhost(cc, b, queue);
    const VhostOps *vhost_ops;

    cc->vring_enable = enable;

    if (!crypto) {
        return 0;
    }

    vhost_ops = crypto->dev.vhost_ops;
    if (vhost_ops->vhost_set_vring_enable) {
        return vhost_ops->vhost_set_vring_enable(&crypto->dev, enable);
    }

    return 0;
}

int cryptodev_vhost_start(VirtIODevice *dev, int total_queues)
{
    VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
    VirtioBusState *vbus = VIRTIO_BUS(qbus);
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
    int r, e;
    int i;
    CryptoDevBackend *b = vcrypto->cryptodev;
    CryptoDevBackendVhost *vhost_crypto;
    CryptoDevBackendClient *cc;

    if (!k->set_guest_notifiers) {
        error_report("binding does not support guest notifiers");
        return -ENOSYS;
    }

    for (i = 0; i < total_queues; i++) {
        cc = b->conf.peers.ccs[i];

        vhost_crypto = cryptodev_get_vhost(cc, b, i);
        cryptodev_vhost_set_vq_index(vhost_crypto, i);

        /* Suppress the masking guest notifiers on vhost user
         * because vhost user doesn't interrupt masking/unmasking
         * properly.
         */
        if (cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER) {
            dev->use_guest_notifier_mask = false;
        }
     }

    r = k->set_guest_notifiers(qbus->parent, total_queues, true);
    if (r < 0) {
        error_report("error binding guest notifier: %d", -r);
        goto err;
    }

    for (i = 0; i < total_queues; i++) {
        cc = b->conf.peers.ccs[i];

        vhost_crypto = cryptodev_get_vhost(cc, b, i);
        r = cryptodev_vhost_start_one(vhost_crypto, dev);

        if (r < 0) {
            goto err_start;
        }

        if (cc->vring_enable) {
            /* restore vring enable state */
            r = vhost_set_vring_enable(cc, b, i, cc->vring_enable);

            if (r < 0) {
                goto err_start;
            }
        }
    }

    return 0;

err_start:
    while (--i >= 0) {
        cc = b->conf.peers.ccs[i];
        vhost_crypto = cryptodev_get_vhost(cc, b, i);
        cryptodev_vhost_stop_one(vhost_crypto, dev);
    }
    e = k->set_guest_notifiers(qbus->parent, total_queues, false);
    if (e < 0) {
        error_report("vhost guest notifier cleanup failed: %d", e);
    }
err:
    return r;
}

void cryptodev_vhost_stop(VirtIODevice *dev, int total_queues)
{
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
    VirtioBusState *vbus = VIRTIO_BUS(qbus);
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
    VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
    CryptoDevBackend *b = vcrypto->cryptodev;
    CryptoDevBackendVhost *vhost_crypto;
    CryptoDevBackendClient *cc;
    size_t i;
    int r;

    for (i = 0; i < total_queues; i++) {
        cc = b->conf.peers.ccs[i];

        vhost_crypto = cryptodev_get_vhost(cc, b, i);
        cryptodev_vhost_stop_one(vhost_crypto, dev);
    }

    r = k->set_guest_notifiers(qbus->parent, total_queues, false);
    if (r < 0) {
        error_report("vhost guest notifier cleanup failed: %d", r);
    }
    assert(r >= 0);
}

void cryptodev_vhost_virtqueue_mask(VirtIODevice *dev,
                                           int queue,
                                           int idx, bool mask)
{
    VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
    CryptoDevBackend *b = vcrypto->cryptodev;
    CryptoDevBackendVhost *vhost_crypto;
    CryptoDevBackendClient *cc;

    assert(queue < MAX_CRYPTO_QUEUE_NUM);

    cc = b->conf.peers.ccs[queue];
    vhost_crypto = cryptodev_get_vhost(cc, b, queue);

    vhost_virtqueue_mask(&vhost_crypto->dev, dev, idx, mask);
}

bool cryptodev_vhost_virtqueue_pending(VirtIODevice *dev,
                                              int queue, int idx)
{
    VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
    CryptoDevBackend *b = vcrypto->cryptodev;
    CryptoDevBackendVhost *vhost_crypto;
    CryptoDevBackendClient *cc;

    assert(queue < MAX_CRYPTO_QUEUE_NUM);

    cc = b->conf.peers.ccs[queue];
    vhost_crypto = cryptodev_get_vhost(cc, b, queue);

    return vhost_virtqueue_pending(&vhost_crypto->dev, idx);
}

#else
uint64_t
cryptodev_vhost_get_max_queues(CryptoDevBackendVhost *crypto)
{
    return 0;
}

void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
{
}

struct CryptoDevBackendVhost *
cryptodev_vhost_init(CryptoDevBackendVhostOptions *options)
{
    return NULL;
}

CryptoDevBackendVhost *
cryptodev_get_vhost(CryptoDevBackendClient *cc,
                    CryptoDevBackend *b,
                    uint16_t queue)
{
    return NULL;
}

int cryptodev_vhost_start(VirtIODevice *dev, int total_queues)
{
    return -1;
}

void cryptodev_vhost_stop(VirtIODevice *dev, int total_queues)
{
}

void cryptodev_vhost_virtqueue_mask(VirtIODevice *dev,
                                    int queue,
                                    int idx, bool mask)
{
}

bool cryptodev_vhost_virtqueue_pending(VirtIODevice *dev,
                                       int queue, int idx)
{
    return false;
}
#endif