uapi/linux/psp-dbc.h

1 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
24  * struct dbc_user_nonce - Nonce exchange structure (input/output).
25  * @auth_needed: Whether the PSP should authenticate this request (input).
27  *               1: authentication: PSP will return multi-use nonce.
30  *               previous nonce (input).
39  * struct dbc_user_setuid - UID exchange structure (input).
49  * struct dbc_user_param - Parameter exchange structure (input/output).
50  * @msg_index: Message indicating what parameter to set or get (input)
51  * @param:     4 byte parameter, units are message specific. (input/output)
53  *             - When sending a message this is to be created by software
54  *               using a previous nonce (input)
55  *             - For interpreting results, this signature is updated by the
70  *  -EINVAL:    invalid input
71  *  -E2BIG:     excess data passed
72  *  -EFAULT:    failed to copy to/from userspace
73  *  -EBUSY:     mailbox in recovery or in use
74  *  -ENODEV:    driver not bound with PSP device
75  *  -EACCES:    request isn't authorized
76  *  -EINVAL:    invalid parameter
77  *  -ETIMEDOUT: request timed out
78  *  -EAGAIN:    invalid request for state machine
79  *  -ENOENT:    not implemented
80  *  -ENFILE:    overflow
81  *  -EPERM:     invalid signature
82  *  -EIO:       unknown error
87  * DBCIOCNONCE - Fetch a nonce from the PSP for authenticating commands.
88  *               If a nonce is fetched without authentication it can only
96  * DBCIOCUID - Set the user ID (UID) of a calling process.
100  *             The UID can only be set once until the system is rebooted.
105  * DBCIOCPARAM - Set or get a parameter from the PSP.
106  *               This request will only work after DBCIOCUID has successfully
118  * enum dbc_cmd_msg - Messages utilized by DBCIOCPARAM