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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