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[J-linux.git] / include / drm / intel / i915_pxp_tee_interface.h
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>
11 struct scatterlist;
12
13 /**
14  * struct i915_pxp_component_ops - ops for PXP services.
15  */
16 struct 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  */
45 struct 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_ */
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