Jamie GibbonsandLeo Yu-Chi Liang
a5f93037f2
The MPFS system controller run_service() helper only submits the mailbox request but does not read back the response data. However, the caller must explicitly receive the response. Add a public system controller helper to receive mailbox service responses to populate the response buffer after issuing a system controller request. Without this, the drivers copy uninitialised stack data instead of mailbox response data, resulting in deterministic output. Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com> Acked-by: Conor Dooley <conor.dooley@microchip.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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*
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* Microchip PolarFire SoC (MPFS)
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*
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* Copyright (c) 2020 Microchip Corporation. All rights reserved.
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*
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*
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*/
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#ifndef _MPFS_MAILBOX_H__
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#define _MPFS_MAILBOX_H__
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#include <linux/types.h>
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#define BYTES_4 4
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struct udevice;
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/**
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* struct mpfs_mss_msg - PolarFire SoC message structure
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* @cmd_opcode: Command opcode
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* @cmd_data_size: Size of the command data.
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* @response: Pointer to the response data.
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* @cmd_data: Pointer to the command data.
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* @mbox_offset: Mailbox offset
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* @resp_offset: Response offset
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*
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*/
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struct mpfs_mss_msg {
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u8 cmd_opcode;
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u16 cmd_data_size;
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struct mpfs_mss_response *response;
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u8 *cmd_data;
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u16 mbox_offset;
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u16 resp_offset;
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};
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/**
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* struct mpfs_mss_response - PolarFire SoC response structure
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* @resp_status: Response status
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* @resp_msg: Pointer to response message.
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* @resp_size: Size of the response message.
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*
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*/
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struct mpfs_mss_response {
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u32 resp_status;
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u32 *resp_msg;
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u16 resp_size;
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};
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struct mpfs_syscontroller_priv;
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struct mpfs_sys_serv {
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struct udevice *dev;
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struct mpfs_syscontroller_priv *sys_controller;
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struct mpfs_mss_msg *msg;
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};
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int mpfs_syscontroller_run_service(struct mpfs_syscontroller_priv *sys_controller, struct mpfs_mss_msg *msg);
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int mpfs_syscontroller_recv_response(struct mpfs_syscontroller_priv
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*sys_controller, struct mpfs_mss_msg *msg, unsigned long timeout_ms);
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int mpfs_syscontroller_read_sernum(struct mpfs_sys_serv *sys_serv_priv, u8 *device_serial_number);
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void mpfs_syscontroller_process_dtbo(struct mpfs_sys_serv *sys_serv_priv);
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struct mpfs_syscontroller_priv *mpfs_syscontroller_get(struct udevice *dev);
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#endif /* __MPFS_MAILBOX_H__ */
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