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