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/*
* Copyright 2022-2023 Virtual Open Systems SAS.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef VIRTIO_RNG_DEV
#define VIRTIO_RNG_DEV
#include "virtio_loopback.h"
extern const char test_str[64];
typedef struct VirtIORNGConf {
uint64_t max_bytes;
uint32_t period_ms;
} VirtIORNGConf;
typedef struct VirtIORNG {
VirtIODevice *parent_obj;
/* Only one vq - guest puts buffer(s) on it when it needs entropy */
VirtQueue *vq;
VirtIORNGConf conf;
/*
* We purposefully don't migrate this state. The quota will reset on the
* destination as a result. Rate limiting is host state, not guest state.
*/
int64_t quota_remaining;
bool activate_timer;
} VirtIORNG;
bool is_guest_ready(VirtIORNG *vrng);
size_t get_request_size(VirtQueue *vq, unsigned quota);
void virtio_rng_set_status(VirtIODevice *vdev, uint8_t status);
void virtio_rng_process(VirtIORNG *vrng);
void chr_read(VirtIORNG *vrng, const void *buf, size_t size);
void virtio_rng_realize(int queue_num, int queue_size);
void virtio_rng_init(VirtIODevice *vdev);
#endif /* VIRTIO_RNG */
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