1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright (c) 2022-2023 Intel Corporation
4  */
5 
6 #ifndef _I915_GSC_PROXY_MEI_INTERFACE_H_
7 #define _I915_GSC_PROXY_MEI_INTERFACE_H_
8 
9 #include <linux/types.h>
10 
11 struct device;
12 struct module;
13 
14 /**
15  * struct i915_gsc_proxy_component_ops - ops for GSC Proxy services.
16  * @owner: Module providing the ops
17  * @send: sends a proxy message from GSC FW to ME FW
18  * @recv: receives a proxy message for GSC FW from ME FW
19  */
20 struct i915_gsc_proxy_component_ops {
21 	struct module *owner;
22 
23 	/**
24 	 * @send: Sends a proxy message to ME FW.
25 	 * @dev: device struct corresponding to the mei device
26 	 * @buf: message buffer to send
27 	 * @size: size of the message
28 	 * Return: bytes sent on success, negative errno value on failure
29 	 */
30 	int (*send)(struct device *dev, const void *buf, size_t size);
31 
32 	/**
33 	 * @recv: Receives a proxy message from ME FW.
34 	 * @dev: device struct corresponding to the mei device
35 	 * @buf: message buffer to contain the received message
36 	 * @size: size of the buffer
37 	 * Return: bytes received on success, negative errno value on failure
38 	 */
39 	int (*recv)(struct device *dev, void *buf, size_t size);
40 };
41 
42 /**
43  * struct i915_gsc_proxy_component - Used for communication between i915 and
44  * MEI drivers for GSC proxy services
45  * @mei_dev: device that provide the GSC proxy service.
46  * @ops: Ops implemented by GSC proxy driver, used by i915 driver.
47  */
48 struct i915_gsc_proxy_component {
49 	struct device *mei_dev;
50 	const struct i915_gsc_proxy_component_ops *ops;
51 };
52 
53 #endif /* _I915_GSC_PROXY_MEI_INTERFACE_H_ */
54