Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * tpmif.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * TPM I/O interface for Xen guest OSes, v2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * This file is in the public domain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef __XEN_PUBLIC_IO_TPMIF_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define __XEN_PUBLIC_IO_TPMIF_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * Xenbus state machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * Device open:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  *   1. Both ends start in XenbusStateInitialising
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  *   2. Backend transitions to InitWait (frontend does not wait on this step)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  *   3. Frontend populates ring-ref, event-channel, feature-protocol-v2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  *   4. Frontend transitions to Initialised
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  *   5. Backend maps grant and event channel, verifies feature-protocol-v2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  *   6. Backend transitions to Connected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  *   7. Frontend verifies feature-protocol-v2, transitions to Connected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * Device close:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  *   1. State is changed to XenbusStateClosing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)  *   2. Frontend transitions to Closed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)  *   3. Backend unmaps grant and event, changes state to InitWait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) enum vtpm_shared_page_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	VTPM_STATE_IDLE,         /* no contents / vTPM idle / cancel complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	VTPM_STATE_SUBMIT,       /* request ready / vTPM working */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	VTPM_STATE_FINISH,       /* response ready / vTPM idle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	VTPM_STATE_CANCEL,       /* cancel requested / vTPM working */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* The backend should only change state to IDLE or FINISH, while the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  * frontend should only change to SUBMIT or CANCEL. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct vtpm_shared_page {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	uint32_t length;         /* request/response length in bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	uint8_t state;           /* enum vtpm_shared_page_state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	uint8_t locality;        /* for the current request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	uint8_t pad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	uint8_t nr_extra_pages;  /* extra pages for long packets; may be zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	uint32_t extra_pages[]; /* grant IDs; length in nr_extra_pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #endif