qemu/include/sysemu/tpm_backend.h
Markus Armbruster 121d07125b Clean up header guards that don't match their file name
Header guard symbols should match their file name to make guard
collisions less likely.  Offenders found with
scripts/clean-header-guards.pl -vn.

Cleaned up with scripts/clean-header-guards.pl, followed by some
renaming of new guard symbols picked by the script to better ones.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
2016-07-12 16:19:16 +02:00

233 lines
5.5 KiB
C

/*
* QEMU TPM Backend
*
* Copyright IBM, Corp. 2013
*
* Authors:
* Stefan Berger <stefanb@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef TPM_BACKEND_H
#define TPM_BACKEND_H
#include "qom/object.h"
#include "qemu-common.h"
#include "qapi-types.h"
#include "qemu/option.h"
#include "sysemu/tpm.h"
#define TYPE_TPM_BACKEND "tpm-backend"
#define TPM_BACKEND(obj) \
OBJECT_CHECK(TPMBackend, (obj), TYPE_TPM_BACKEND)
#define TPM_BACKEND_GET_CLASS(obj) \
OBJECT_GET_CLASS(TPMBackendClass, (obj), TYPE_TPM_BACKEND)
#define TPM_BACKEND_CLASS(klass) \
OBJECT_CLASS_CHECK(TPMBackendClass, (klass), TYPE_TPM_BACKEND)
typedef struct TPMBackendClass TPMBackendClass;
typedef struct TPMBackend TPMBackend;
typedef struct TPMDriverOps TPMDriverOps;
struct TPMBackendClass {
ObjectClass parent_class;
const TPMDriverOps *ops;
void (*opened)(TPMBackend *s, Error **errp);
};
struct TPMBackend {
Object parent;
/*< protected >*/
bool opened;
char *id;
enum TpmModel fe_model;
char *path;
char *cancel_path;
const TPMDriverOps *ops;
QLIST_ENTRY(TPMBackend) list;
};
typedef void (TPMRecvDataCB)(TPMState *, uint8_t locty, bool selftest_done);
typedef struct TPMSizedBuffer {
uint32_t size;
uint8_t *buffer;
} TPMSizedBuffer;
struct TPMDriverOps {
enum TpmType type;
const QemuOptDesc *opts;
/* get a descriptive text of the backend to display to the user */
const char *(*desc)(void);
TPMBackend *(*create)(QemuOpts *opts, const char *id);
void (*destroy)(TPMBackend *t);
/* initialize the backend */
int (*init)(TPMBackend *t, TPMState *s, TPMRecvDataCB *datacb);
/* start up the TPM on the backend */
int (*startup_tpm)(TPMBackend *t);
/* returns true if nothing will ever answer TPM requests */
bool (*had_startup_error)(TPMBackend *t);
size_t (*realloc_buffer)(TPMSizedBuffer *sb);
void (*deliver_request)(TPMBackend *t);
void (*reset)(TPMBackend *t);
void (*cancel_cmd)(TPMBackend *t);
bool (*get_tpm_established_flag)(TPMBackend *t);
int (*reset_tpm_established_flag)(TPMBackend *t, uint8_t locty);
TPMVersion (*get_tpm_version)(TPMBackend *t);
};
/**
* tpm_backend_get_type:
* @s: the backend
*
* Returns the TpmType of the backend.
*/
enum TpmType tpm_backend_get_type(TPMBackend *s);
/**
* tpm_backend_get_desc:
* @s: the backend
*
* Returns a human readable description of the backend.
*/
const char *tpm_backend_get_desc(TPMBackend *s);
/**
* tpm_backend_destroy:
* @s: the backend to destroy
*/
void tpm_backend_destroy(TPMBackend *s);
/**
* tpm_backend_init:
* @s: the backend to initialized
* @state: TPMState
* @datacb: callback for sending data to frontend
*
* Initialize the backend with the given variables.
*
* Returns 0 on success.
*/
int tpm_backend_init(TPMBackend *s, TPMState *state,
TPMRecvDataCB *datacb);
/**
* tpm_backend_startup_tpm:
* @s: the backend whose TPM support is to be started
*
* Returns 0 on success.
*/
int tpm_backend_startup_tpm(TPMBackend *s);
/**
* tpm_backend_had_startup_error:
* @s: the backend to query for a statup error
*
* Check whether the backend had an error during startup. Returns
* false if no error occurred and the backend can be used, true
* otherwise.
*/
bool tpm_backend_had_startup_error(TPMBackend *s);
/**
* tpm_backend_realloc_buffer:
* @s: the backend
* @sb: the TPMSizedBuffer to re-allocated to the size suitable for the
* backend.
*
* This function returns the size of the allocated buffer
*/
size_t tpm_backend_realloc_buffer(TPMBackend *s, TPMSizedBuffer *sb);
/**
* tpm_backend_deliver_request:
* @s: the backend to send the request to
*
* Send a request to the backend. The backend will then send the request
* to the TPM implementation.
*/
void tpm_backend_deliver_request(TPMBackend *s);
/**
* tpm_backend_reset:
* @s: the backend to reset
*
* Reset the backend into a well defined state with all previous errors
* reset.
*/
void tpm_backend_reset(TPMBackend *s);
/**
* tpm_backend_cancel_cmd:
* @s: the backend
*
* Cancel any ongoing command being processed by the TPM implementation
* on behalf of the QEMU guest.
*/
void tpm_backend_cancel_cmd(TPMBackend *s);
/**
* tpm_backend_get_tpm_established_flag:
* @s: the backend
*
* Get the TPM establishment flag. This function may be called very
* frequently by the frontend since for example in the TIS implementation
* this flag is part of a register.
*/
bool tpm_backend_get_tpm_established_flag(TPMBackend *s);
/**
* tpm_backend_reset_tpm_established_flag:
* @s: the backend
* @locty: the locality number
*
* Reset the TPM establishment flag.
*/
int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty);
/**
* tpm_backend_open:
* @s: the backend to open
* @errp: a pointer to return the #Error object if an error occurs.
*
* This function will open the backend if it is not already open. Calling this
* function on an already opened backend will not result in an error.
*/
void tpm_backend_open(TPMBackend *s, Error **errp);
/**
* tpm_backend_get_tpm_version:
* @s: the backend to call into
*
* Get the TPM Version that is emulated at the backend.
*
* Returns TPMVersion.
*/
TPMVersion tpm_backend_get_tpm_version(TPMBackend *s);
TPMBackend *qemu_find_tpm(const char *id);
const TPMDriverOps *tpm_get_backend_driver(const char *type);
int tpm_register_model(enum TpmModel model);
int tpm_register_driver(const TPMDriverOps *tdo);
#endif