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Diffstat (limited to 'extras/mini-os/include/tpmfront.h')
-rw-r--r-- | extras/mini-os/include/tpmfront.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/extras/mini-os/include/tpmfront.h b/extras/mini-os/include/tpmfront.h new file mode 100644 index 0000000000..fd2cb17fc9 --- /dev/null +++ b/extras/mini-os/include/tpmfront.h @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2010-2012 United States Government, as represented by + * the Secretary of Defense. All rights reserved. + * + * This code has been derived from drivers/char/tpm_vtpm.c + * from the xen 2.6.18 linux kernel + * + * Copyright (C) 2006 IBM Corporation + * + * This code has also been derived from drivers/char/tpm_xen.c + * from the xen 2.6.18 linux kernel + * + * Copyright (c) 2005, IBM Corporation + * + * which was itself derived from drivers/xen/netfront/netfront.c + * from the linux kernel + * + * Copyright (c) 2002-2004, K A Fraser + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2 of the + * License. + */ +#ifndef TPMFRONT_H +#define TPMFRONT_H + +#include <mini-os/types.h> +#include <mini-os/os.h> +#include <mini-os/events.h> +#include <mini-os/wait.h> +#include <xen/xen.h> +#include <xen/io/xenbus.h> +#include <xen/io/tpmif.h> + +struct tpmfront_dev { + grant_ref_t ring_ref; + evtchn_port_t evtchn; + + tpmif_tx_interface_t* tx; + + void** pages; + + domid_t bedomid; + char* nodename; + char* bepath; + + XenbusState state; + + uint8_t waiting; + struct wait_queue_head waitq; + + uint8_t* respbuf; + size_t resplen; + +#ifdef HAVE_LIBC + int fd; +#endif + +}; + + +/*Initialize frontend */ +struct tpmfront_dev* init_tpmfront(const char* nodename); +/*Shutdown frontend */ +void shutdown_tpmfront(struct tpmfront_dev* dev); + +/* Send a tpm command to the backend and wait for the response + * + * @dev - frontend device + * @req - request buffer + * @reqlen - length of request buffer + * @resp - *resp will be set to internal response buffer, don't free it! Value is undefined on error + * @resplen - *resplen will be set to the length of the response. Value is undefined on error + * + * returns 0 on success, non zero on failure. + * */ +int tpmfront_cmd(struct tpmfront_dev* dev, uint8_t* req, size_t reqlen, uint8_t** resp, size_t* resplen); + +#ifdef HAVE_LIBC +#include <sys/stat.h> +/* POSIX IO functions: + * use tpmfront_open() to get a file descriptor to the tpm device + * use write() on the fd to send a command to the backend. You must + * include the entire command in a single call to write(). + * use read() on the fd to read the response. You can use + * fstat() to get the size of the response and lseek() to seek on it. + */ +int tpmfront_open(struct tpmfront_dev* dev); +int tpmfront_posix_read(int fd, uint8_t* buf, size_t count); +int tpmfront_posix_write(int fd, const uint8_t* buf, size_t count); +int tpmfront_posix_fstat(int fd, struct stat* buf); +#endif + + +#endif |