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crypto: ccp - Add support for setting user ID for dynamic boost control
[tomoyo/tomoyo-test1.git] / include / linux / psp-platform-access.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #ifndef __PSP_PLATFORM_ACCESS_H
4 #define __PSP_PLATFORM_ACCESS_H
5
6 #include <linux/psp.h>
7
8 enum psp_platform_access_msg {
9         PSP_CMD_NONE = 0x0,
10         PSP_I2C_REQ_BUS_CMD = 0x64,
11         PSP_DYNAMIC_BOOST_GET_NONCE,
12         PSP_DYNAMIC_BOOST_SET_UID,
13 };
14
15 struct psp_req_buffer_hdr {
16         u32 payload_size;
17         u32 status;
18 } __packed;
19
20 struct psp_request {
21         struct psp_req_buffer_hdr header;
22         void *buf;
23 } __packed;
24
25 /**
26  * psp_send_platform_access_msg() - Send a message to control platform features
27  *
28  * This function is intended to be used by drivers outside of ccp to communicate
29  * with the platform.
30  *
31  * Returns:
32  *  0:           success
33  *  -%EBUSY:     mailbox in recovery or in use
34  *  -%ENODEV:    driver not bound with PSP device
35  *  -%ETIMEDOUT: request timed out
36  *  -%EIO:       unknown error (see kernel log)
37  */
38 int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_request *req);
39
40 /**
41  * psp_ring_platform_doorbell() - Ring platform doorbell
42  *
43  * This function is intended to be used by drivers outside of ccp to ring the
44  * platform doorbell with a message.
45  *
46  * Returns:
47  *  0:           success
48  *  -%EBUSY:     mailbox in recovery or in use
49  *  -%ENODEV:    driver not bound with PSP device
50  *  -%ETIMEDOUT: request timed out
51  *  -%EIO:       error will be stored in result argument
52  */
53 int psp_ring_platform_doorbell(int msg, u32 *result);
54
55 /**
56  * psp_check_platform_access_status() - Checks whether platform features is ready
57  *
58  * This function is intended to be used by drivers outside of ccp to determine
59  * if platform features has initialized.
60  *
61  * Returns:
62  * 0          platform features is ready
63  * -%ENODEV   platform features is not ready or present
64  */
65 int psp_check_platform_access_status(void);
66
67 #endif /* __PSP_PLATFORM_ACCESS_H */