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_ */
63