1/* SPDX-License-Identifier: MIT */
 2/*
 3 * Copyright © 2020 Intel Corporation
 4 */
 5
 6#ifndef _I915_PXP_TEE_INTERFACE_H_
 7#define _I915_PXP_TEE_INTERFACE_H_
 8
 9#include <linux/mutex.h>
10#include <linux/device.h>
11struct scatterlist;
12
13/**
14 * struct i915_pxp_component_ops - ops for PXP services.
15 */
16struct i915_pxp_component_ops {
17	/**
18	 * @owner: Module providing the ops.
19	 */
20	struct module *owner;
21
22	/**
23	 * @send: Send a PXP message.
24	 */
25	int (*send)(struct device *dev, const void *message, size_t size,
26		    unsigned long timeout_ms);
27	/**
28	 * @recv: Receive a PXP message.
29	 */
30	int (*recv)(struct device *dev, void *buffer, size_t size,
31		    unsigned long timeout_ms);
32	/**
33	 * @gsc_command: Send a GSC command.
34	 */
35	ssize_t (*gsc_command)(struct device *dev, u8 client_id, u32 fence_id,
36			       struct scatterlist *sg_in, size_t total_in_len,
37			       struct scatterlist *sg_out);
38
39};
40
41/**
42 * struct i915_pxp_component - Used for communication between i915 and TEE
43 * drivers for the PXP services
44 */
45struct i915_pxp_component {
46	/**
47	 * @tee_dev: device that provide the PXP service from TEE Bus.
48	 */
49	struct device *tee_dev;
50
51	/**
52	 * @ops: Ops implemented by TEE driver, used by i915 driver.
53	 */
54	const struct i915_pxp_component_ops *ops;
55
56	/**
57	 * @mutex: To protect the above members.
58	 */
59	struct mutex mutex;
60};
61
62#endif /* _I915_TEE_PXP_INTERFACE_H_ */