forked from mirrors/linux
e2cfe05e92
After software has authenticated a dynamic boost control request, it can fetch and set supported parameters using a selection of messages. Add support for these messages and export the ability to do this to userspace. Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
147 lines
5.1 KiB
C
147 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
|
|
/*
|
|
* Userspace interface for AMD Dynamic Boost Control (DBC)
|
|
*
|
|
* Copyright (C) 2023 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Mario Limonciello <mario.limonciello@amd.com>
|
|
*/
|
|
|
|
#ifndef __PSP_DBC_USER_H__
|
|
#define __PSP_DBC_USER_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
/**
|
|
* DOC: AMD Dynamic Boost Control (DBC) interface
|
|
*/
|
|
|
|
#define DBC_NONCE_SIZE 16
|
|
#define DBC_SIG_SIZE 32
|
|
#define DBC_UID_SIZE 16
|
|
|
|
/**
|
|
* struct dbc_user_nonce - Nonce exchange structure (input/output).
|
|
* @auth_needed: Whether the PSP should authenticate this request (input).
|
|
* 0: no authentication, PSP will return single use nonce.
|
|
* 1: authentication: PSP will return multi-use nonce.
|
|
* @nonce: 8 byte value used for future authentication (output).
|
|
* @signature: Optional 32 byte signature created by software using a
|
|
* previous nonce (input).
|
|
*/
|
|
struct dbc_user_nonce {
|
|
__u32 auth_needed;
|
|
__u8 nonce[DBC_NONCE_SIZE];
|
|
__u8 signature[DBC_SIG_SIZE];
|
|
} __packed;
|
|
|
|
/**
|
|
* struct dbc_user_setuid - UID exchange structure (input).
|
|
* @uid: 16 byte value representing software identity
|
|
* @signature: 32 byte signature created by software using a previous nonce
|
|
*/
|
|
struct dbc_user_setuid {
|
|
__u8 uid[DBC_UID_SIZE];
|
|
__u8 signature[DBC_SIG_SIZE];
|
|
} __packed;
|
|
|
|
/**
|
|
* struct dbc_user_param - Parameter exchange structure (input/output).
|
|
* @msg_index: Message indicating what parameter to set or get (input)
|
|
* @param: 4 byte parameter, units are message specific. (input/output)
|
|
* @signature: 32 byte signature.
|
|
* - When sending a message this is to be created by software
|
|
* using a previous nonce (input)
|
|
* - For interpreting results, this signature is updated by the
|
|
* PSP to allow software to validate the authenticity of the
|
|
* results.
|
|
*/
|
|
struct dbc_user_param {
|
|
__u32 msg_index;
|
|
__u32 param;
|
|
__u8 signature[DBC_SIG_SIZE];
|
|
} __packed;
|
|
|
|
/**
|
|
* Dynamic Boost Control (DBC) IOC
|
|
*
|
|
* possible return codes for all DBC IOCTLs:
|
|
* 0: success
|
|
* -EINVAL: invalid input
|
|
* -E2BIG: excess data passed
|
|
* -EFAULT: failed to copy to/from userspace
|
|
* -EBUSY: mailbox in recovery or in use
|
|
* -ENODEV: driver not bound with PSP device
|
|
* -EACCES: request isn't authorized
|
|
* -EINVAL: invalid parameter
|
|
* -ETIMEDOUT: request timed out
|
|
* -EAGAIN: invalid request for state machine
|
|
* -ENOENT: not implemented
|
|
* -ENFILE: overflow
|
|
* -EPERM: invalid signature
|
|
* -EIO: unknown error
|
|
*/
|
|
#define DBC_IOC_TYPE 'D'
|
|
|
|
/**
|
|
* DBCIOCNONCE - Fetch a nonce from the PSP for authenticating commands.
|
|
* If a nonce is fetched without authentication it can only
|
|
* be utilized for one command.
|
|
* If a nonce is fetched with authentication it can be used
|
|
* for multiple requests.
|
|
*/
|
|
#define DBCIOCNONCE _IOWR(DBC_IOC_TYPE, 0x1, struct dbc_user_nonce)
|
|
|
|
/**
|
|
* DBCIOCUID - Set the user ID (UID) of a calling process.
|
|
* The user ID is 8 bytes long. It must be programmed using a
|
|
* 32 byte signature built using the nonce fetched from
|
|
* DBCIOCNONCE.
|
|
* The UID can only be set once until the system is rebooted.
|
|
*/
|
|
#define DBCIOCUID _IOW(DBC_IOC_TYPE, 0x2, struct dbc_user_setuid)
|
|
|
|
/**
|
|
* DBCIOCPARAM - Set or get a parameter from the PSP.
|
|
* This request will only work after DBCIOCUID has successfully
|
|
* set the UID of the calling process.
|
|
* Whether the parameter is set or get is controlled by the
|
|
* message ID in the request.
|
|
* This command must be sent using a 32 byte signature built
|
|
* using the nonce fetched from DBCIOCNONCE.
|
|
* When the command succeeds, the 32 byte signature will be
|
|
* updated by the PSP for software to authenticate the results.
|
|
*/
|
|
#define DBCIOCPARAM _IOWR(DBC_IOC_TYPE, 0x3, struct dbc_user_param)
|
|
|
|
/**
|
|
* enum dbc_cmd_msg - Messages utilized by DBCIOCPARAM
|
|
* @PARAM_GET_FMAX_CAP: Get frequency cap (MHz)
|
|
* @PARAM_SET_FMAX_CAP: Set frequency cap (MHz)
|
|
* @PARAM_GET_PWR_CAP: Get socket power cap (mW)
|
|
* @PARAM_SET_PWR_CAP: Set socket power cap (mW)
|
|
* @PARAM_GET_GFX_MODE: Get graphics mode (0/1)
|
|
* @PARAM_SET_GFX_MODE: Set graphics mode (0/1)
|
|
* @PARAM_GET_CURR_TEMP: Get current temperature (degrees C)
|
|
* @PARAM_GET_FMAX_MAX: Get maximum allowed value for frequency (MHz)
|
|
* @PARAM_GET_FMAX_MIN: Get minimum allowed value for frequency (MHz)
|
|
* @PARAM_GET_SOC_PWR_MAX: Get maximum allowed value for SoC power (mw)
|
|
* @PARAM_GET_SOC_PWR_MIN: Get minimum allowed value for SoC power (mw)
|
|
* @PARAM_GET_SOC_PWR_CUR: Get current value for SoC Power (mW)
|
|
*/
|
|
enum dbc_cmd_msg {
|
|
PARAM_GET_FMAX_CAP = 0x3,
|
|
PARAM_SET_FMAX_CAP = 0x4,
|
|
PARAM_GET_PWR_CAP = 0x5,
|
|
PARAM_SET_PWR_CAP = 0x6,
|
|
PARAM_GET_GFX_MODE = 0x7,
|
|
PARAM_SET_GFX_MODE = 0x8,
|
|
PARAM_GET_CURR_TEMP = 0x9,
|
|
PARAM_GET_FMAX_MAX = 0xA,
|
|
PARAM_GET_FMAX_MIN = 0xB,
|
|
PARAM_GET_SOC_PWR_MAX = 0xC,
|
|
PARAM_GET_SOC_PWR_MIN = 0xD,
|
|
PARAM_GET_SOC_PWR_CUR = 0xE,
|
|
};
|
|
|
|
#endif /* __PSP_DBC_USER_H__ */
|