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// SPDX-License-Identifier: GPL-2.0-only
/*
* AMD Secure Processor Dynamic Boost Control sample library
*
* Copyright (C) 2023 Advanced Micro Devices, Inc.
*
* Author: Mario Limonciello <mario.limonciello@amd.com>
*/
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
/* if uapi header isn't installed, this might not yet exist */
#ifndef __packed
#define __packed __attribute__((packed))
#endif
#include <linux/psp-dbc.h>
int get_nonce(int fd, void *nonce_out, void *signature)
{
struct dbc_user_nonce tmp = {
.auth_needed = !!signature,
};
assert(nonce_out);
if (signature)
memcpy(tmp.signature, signature, sizeof(tmp.signature));
if (ioctl(fd, DBCIOCNONCE, &tmp))
return errno;
memcpy(nonce_out, tmp.nonce, sizeof(tmp.nonce));
return 0;
}
int set_uid(int fd, __u8 *uid, __u8 *signature)
{
struct dbc_user_setuid tmp;
assert(uid);
assert(signature);
memcpy(tmp.uid, uid, sizeof(tmp.uid));
memcpy(tmp.signature, signature, sizeof(tmp.signature));
if (ioctl(fd, DBCIOCUID, &tmp))
return errno;
return 0;
}
int process_param(int fd, int msg_index, __u8 *signature, int *data)
{
struct dbc_user_param tmp = {
.msg_index = msg_index,
.param = *data,
};
assert(signature);
assert(data);
memcpy(tmp.signature, signature, sizeof(tmp.signature));
if (ioctl(fd, DBCIOCPARAM, &tmp))
return errno;
*data = tmp.param;
memcpy(signature, tmp.signature, sizeof(tmp.signature));
return 0;
}
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