mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 05:42:58 +00:00
c6230cd842
The commit 85dc582892 ("firmware: scmi: prepare uclass to pass channel
reference") added an explicit parameter, channel, but it seems to make
the code complex.
Hiding this parameter will allow for adding a generic (protocol-agnostic)
helper function, i.e. for PROTOCOL_VERSION, in a later patch.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
|
|
/*
|
|
* Copyright (c) 2015-2019, Arm Limited and Contributors. All rights reserved.
|
|
* Copyright (C) 2019-2020, Linaro Limited
|
|
*
|
|
* An SCMI agent device represent on communication path from a
|
|
* device driver to the remote SCMI server which driver sends
|
|
* messages to and receives response messages from.
|
|
*/
|
|
#ifndef SCMI_AGENT_H
|
|
#define SCMI_AGENT_H
|
|
|
|
#include <asm/types.h>
|
|
|
|
struct udevice;
|
|
struct scmi_channel;
|
|
|
|
/**
|
|
* struct scmi_agent_proto_priv - Private data in device for SCMI agent
|
|
* @channel: Reference to the SCMI channel to use
|
|
*/
|
|
struct scmi_agent_proto_priv {
|
|
struct scmi_channel *channel;
|
|
};
|
|
|
|
/*
|
|
* struct scmi_msg - Context of a SCMI message sent and the response received
|
|
*
|
|
* @protocol_id: SCMI protocol ID
|
|
* @message_id: SCMI message ID for a defined protocol ID
|
|
* @in_msg: Pointer to the message payload sent by the driver
|
|
* @in_msg_sz: Byte size of the message payload sent
|
|
* @out_msg: Pointer to buffer to store response message payload
|
|
* @out_msg_sz: Byte size of the response buffer and response payload
|
|
*/
|
|
struct scmi_msg {
|
|
unsigned int protocol_id;
|
|
unsigned int message_id;
|
|
u8 *in_msg;
|
|
size_t in_msg_sz;
|
|
u8 *out_msg;
|
|
size_t out_msg_sz;
|
|
};
|
|
|
|
/* Helper macro to match a message on input/output array references */
|
|
#define SCMI_MSG_IN(_protocol, _message, _in_array, _out_array) \
|
|
(struct scmi_msg){ \
|
|
.protocol_id = (_protocol), \
|
|
.message_id = (_message), \
|
|
.in_msg = (uint8_t *)&(_in_array), \
|
|
.in_msg_sz = sizeof(_in_array), \
|
|
.out_msg = (uint8_t *)&(_out_array), \
|
|
.out_msg_sz = sizeof(_out_array), \
|
|
}
|
|
|
|
/**
|
|
* devm_scmi_of_get_channel() - Get SCMI channel handle from SCMI agent DT node
|
|
*
|
|
* @dev: Device requesting a channel
|
|
* @return 0 on success and a negative errno on failure
|
|
*/
|
|
int devm_scmi_of_get_channel(struct udevice *dev);
|
|
|
|
/**
|
|
* devm_scmi_process_msg() - Send and process an SCMI message
|
|
*
|
|
* Send a message to an SCMI server through a target SCMI agent device.
|
|
* Caller sets scmi_msg::out_msg_sz to the output message buffer size.
|
|
* On return, scmi_msg::out_msg_sz stores the response payload size.
|
|
*
|
|
* @dev: SCMI device
|
|
* @msg: Message structure reference
|
|
* Return: 0 on success and a negative errno on failure
|
|
*/
|
|
int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg);
|
|
|
|
/**
|
|
* scmi_to_linux_errno() - Convert an SCMI error code into a Linux errno code
|
|
*
|
|
* @scmi_errno: SCMI error code value
|
|
* Return: 0 for successful status and a negative errno otherwise
|
|
*/
|
|
int scmi_to_linux_errno(s32 scmi_errno);
|
|
|
|
#endif /* SCMI_H */
|