backends/cryptodev-vhost.c

   1 /*
   2  * QEMU Cryptodev backend for QEMU cipher APIs
   3  *
   4  * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
   5  *
   6  * Authors:
   7  *    Gonglei <arei.gonglei@huawei.com>
   8  *    Jay Zhou <jianjay.zhou@huawei.com>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22  *
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "sysemu/cryptodev-vhost.h"
  27
  28 #ifdef CONFIG_VHOST_CRYPTO
  29 uint64_t
  30 cryptodev_vhost_get_max_queues(
  31                         CryptoDevBackendVhost *crypto)
  32 {
  33     return crypto->dev.max_queues;
  34 }
  35
  36 void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
  37 {
  38     vhost_dev_cleanup(&crypto->dev);
  39     g_free(crypto);
  40 }
  41
  42 struct CryptoDevBackendVhost *
  43 cryptodev_vhost_init(
  44              CryptoDevBackendVhostOptions *options)
  45 {
  46     int r;
  47     CryptoDevBackendVhost *crypto;
  48
  49     crypto = g_new(CryptoDevBackendVhost, 1);
  50     crypto->dev.max_queues = 1;
  51     crypto->dev.nvqs = 1;
  52     crypto->dev.vqs = crypto->vqs;
  53
  54     crypto->cc = options->cc;
  55
  56     crypto->dev.protocol_features = 0;
  57     crypto->backend = -1;
  58
  59     /* vhost-user needs vq_index to initiate a specific queue pair */
  60     crypto->dev.vq_index = crypto->cc->queue_index * crypto->dev.nvqs;
  61
  62     r = vhost_dev_init(&crypto->dev, options->opaque, options->backend_type, 0);
  63     if (r < 0) {
  64         goto fail;
  65     }
  66
  67     return crypto;
  68 fail:
  69     g_free(crypto);
  70     return NULL;
  71 }
  72
  73 #else
  74 uint64_t
  75 cryptodev_vhost_get_max_queues(CryptoDevBackendVhost *crypto)
  76 {
  77     return 0;
  78 }
  79
  80 void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
  81 {
  82 }
  83
  84 struct CryptoDevBackendVhost *
  85 cryptodev_vhost_init(CryptoDevBackendVhostOptions *options)
  86 {
  87     return NULL;
  88 }
  89 #endif