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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright(c) 2024 Intel Corporation. */
#ifndef __CXL_MBOX_H__
#define __CXL_MBOX_H__
#include <linux/rcuwait.h>
struct cxl_mbox_cmd;
/**
* struct cxl_mailbox - context for CXL mailbox operations
* @host: device that hosts the mailbox
* @payload_size: Size of space for payload
* (CXL 3.1 8.2.8.4.3 Mailbox Capabilities Register)
* @mbox_mutex: mutex protects device mailbox and firmware
* @mbox_wait: rcuwait for mailbox
* @mbox_send: @dev specific transport for transmitting mailbox commands
*/
struct cxl_mailbox {
struct device *host;
size_t payload_size;
struct mutex mbox_mutex; /* lock to protect mailbox context */
struct rcuwait mbox_wait;
int (*mbox_send)(struct cxl_mailbox *cxl_mbox, struct cxl_mbox_cmd *cmd);
};
int cxl_mailbox_init(struct cxl_mailbox *cxl_mbox, struct device *host);
#endif