1 /*
2  * Copyright (C) 2004 IBM Corporation
3  * Copyright (C) 2015 Intel Corporation
4  *
5  * Authors:
6  * Leendert van Doorn <leendert@watson.ibm.com>
7  * Dave Safford <safford@watson.ibm.com>
8  * Reiner Sailer <sailer@watson.ibm.com>
9  * Kylene Hall <kjhall@us.ibm.com>
10  *
11  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
12  *
13  * Device driver for TCG/TCPA TPM (trusted platform module).
14  * Specifications at www.trustedcomputinggroup.org
15  *
16  * This program is free software; you can redistribute it and/or
17  * modify it under the terms of the GNU General Public License as
18  * published by the Free Software Foundation, version 2 of the
19  * License.
20  *
21  */
22 
23 #ifndef __TPM_H__
24 #define __TPM_H__
25 
26 #include <linux/module.h>
27 #include <linux/delay.h>
28 #include <linux/fs.h>
29 #include <linux/hw_random.h>
30 #include <linux/mutex.h>
31 #include <linux/sched.h>
32 #include <linux/platform_device.h>
33 #include <linux/io.h>
34 #include <linux/tpm.h>
35 #include <linux/acpi.h>
36 #include <linux/cdev.h>
37 #include <linux/highmem.h>
38 #include <linux/tpm_eventlog.h>
39 #include <crypto/hash_info.h>
40 
41 #ifdef CONFIG_X86
42 #include <asm/intel-family.h>
43 #endif
44 
45 enum tpm_const {
46 	TPM_MINOR = 224,	/* officially assigned */
47 	TPM_BUFSIZE = 4096,
48 	TPM_NUM_DEVICES = 65536,
49 	TPM_RETRY = 50,		/* 5 seconds */
50 	TPM_NUM_EVENT_LOG_FILES = 3,
51 };
52 
53 enum tpm_timeout {
54 	TPM_TIMEOUT = 5,	/* msecs */
55 	TPM_TIMEOUT_RETRY = 100, /* msecs */
56 	TPM_TIMEOUT_RANGE_US = 300,	/* usecs */
57 	TPM_TIMEOUT_POLL = 1,	/* msecs */
58 	TPM_TIMEOUT_USECS_MIN = 100,      /* usecs */
59 	TPM_TIMEOUT_USECS_MAX = 500      /* usecs */
60 };
61 
62 /* TPM addresses */
63 enum tpm_addr {
64 	TPM_SUPERIO_ADDR = 0x2E,
65 	TPM_ADDR = 0x4E,
66 };
67 
68 /* Indexes the duration array */
69 enum tpm_duration {
70 	TPM_SHORT = 0,
71 	TPM_MEDIUM = 1,
72 	TPM_LONG = 2,
73 	TPM_LONG_LONG = 3,
74 	TPM_UNDEFINED,
75 	TPM_NUM_DURATIONS = TPM_UNDEFINED,
76 };
77 
78 #define TPM_WARN_RETRY          0x800
79 #define TPM_WARN_DOING_SELFTEST 0x802
80 #define TPM_ERR_DEACTIVATED     0x6
81 #define TPM_ERR_DISABLED        0x7
82 #define TPM_ERR_INVALID_POSTINIT 38
83 
84 #define TPM_HEADER_SIZE		10
85 
86 enum tpm2_const {
87 	TPM2_PLATFORM_PCR       =     24,
88 	TPM2_PCR_SELECT_MIN     = ((TPM2_PLATFORM_PCR + 7) / 8),
89 };
90 
91 enum tpm2_timeouts {
92 	TPM2_TIMEOUT_A          =    750,
93 	TPM2_TIMEOUT_B          =   2000,
94 	TPM2_TIMEOUT_C          =    200,
95 	TPM2_TIMEOUT_D          =     30,
96 	TPM2_DURATION_SHORT     =     20,
97 	TPM2_DURATION_MEDIUM    =    750,
98 	TPM2_DURATION_LONG      =   2000,
99 	TPM2_DURATION_LONG_LONG = 300000,
100 	TPM2_DURATION_DEFAULT   = 120000,
101 };
102 
103 enum tpm2_structures {
104 	TPM2_ST_NO_SESSIONS	= 0x8001,
105 	TPM2_ST_SESSIONS	= 0x8002,
106 };
107 
108 /* Indicates from what layer of the software stack the error comes from */
109 #define TSS2_RC_LAYER_SHIFT	 16
110 #define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
111 
112 enum tpm2_return_codes {
113 	TPM2_RC_SUCCESS		= 0x0000,
114 	TPM2_RC_HASH		= 0x0083, /* RC_FMT1 */
115 	TPM2_RC_HANDLE		= 0x008B,
116 	TPM2_RC_INITIALIZE	= 0x0100, /* RC_VER1 */
117 	TPM2_RC_FAILURE		= 0x0101,
118 	TPM2_RC_DISABLED	= 0x0120,
119 	TPM2_RC_COMMAND_CODE    = 0x0143,
120 	TPM2_RC_TESTING		= 0x090A, /* RC_WARN */
121 	TPM2_RC_REFERENCE_H0	= 0x0910,
122 	TPM2_RC_RETRY		= 0x0922,
123 };
124 
125 enum tpm2_algorithms {
126 	TPM2_ALG_ERROR		= 0x0000,
127 	TPM2_ALG_SHA1		= 0x0004,
128 	TPM2_ALG_KEYEDHASH	= 0x0008,
129 	TPM2_ALG_SHA256		= 0x000B,
130 	TPM2_ALG_SHA384		= 0x000C,
131 	TPM2_ALG_SHA512		= 0x000D,
132 	TPM2_ALG_NULL		= 0x0010,
133 	TPM2_ALG_SM3_256	= 0x0012,
134 };
135 
136 enum tpm2_command_codes {
137 	TPM2_CC_FIRST		= 0x011F,
138 	TPM2_CC_CREATE_PRIMARY  = 0x0131,
139 	TPM2_CC_SELF_TEST	= 0x0143,
140 	TPM2_CC_STARTUP		= 0x0144,
141 	TPM2_CC_SHUTDOWN	= 0x0145,
142 	TPM2_CC_CREATE		= 0x0153,
143 	TPM2_CC_LOAD		= 0x0157,
144 	TPM2_CC_UNSEAL		= 0x015E,
145 	TPM2_CC_CONTEXT_LOAD	= 0x0161,
146 	TPM2_CC_CONTEXT_SAVE	= 0x0162,
147 	TPM2_CC_FLUSH_CONTEXT	= 0x0165,
148 	TPM2_CC_GET_CAPABILITY	= 0x017A,
149 	TPM2_CC_GET_RANDOM	= 0x017B,
150 	TPM2_CC_PCR_READ	= 0x017E,
151 	TPM2_CC_PCR_EXTEND	= 0x0182,
152 	TPM2_CC_LAST		= 0x018F,
153 };
154 
155 enum tpm2_permanent_handles {
156 	TPM2_RS_PW		= 0x40000009,
157 };
158 
159 enum tpm2_capabilities {
160 	TPM2_CAP_HANDLES	= 1,
161 	TPM2_CAP_COMMANDS	= 2,
162 	TPM2_CAP_PCRS		= 5,
163 	TPM2_CAP_TPM_PROPERTIES = 6,
164 };
165 
166 enum tpm2_properties {
167 	TPM_PT_TOTAL_COMMANDS	= 0x0129,
168 };
169 
170 enum tpm2_startup_types {
171 	TPM2_SU_CLEAR	= 0x0000,
172 	TPM2_SU_STATE	= 0x0001,
173 };
174 
175 enum tpm2_cc_attrs {
176 	TPM2_CC_ATTR_CHANDLES	= 25,
177 	TPM2_CC_ATTR_RHANDLE	= 28,
178 };
179 
180 #define TPM_VID_INTEL    0x8086
181 #define TPM_VID_WINBOND  0x1050
182 #define TPM_VID_STM      0x104A
183 
184 #define TPM_PPI_VERSION_LEN		3
185 
186 struct tpm_space {
187 	u32 context_tbl[3];
188 	u8 *context_buf;
189 	u32 session_tbl[3];
190 	u8 *session_buf;
191 	u32 buf_size;
192 };
193 
194 enum tpm_chip_flags {
195 	TPM_CHIP_FLAG_TPM2		= BIT(1),
196 	TPM_CHIP_FLAG_IRQ		= BIT(2),
197 	TPM_CHIP_FLAG_VIRTUAL		= BIT(3),
198 	TPM_CHIP_FLAG_HAVE_TIMEOUTS	= BIT(4),
199 	TPM_CHIP_FLAG_ALWAYS_POWERED	= BIT(5),
200 };
201 
202 struct tpm_bios_log {
203 	void *bios_event_log;
204 	void *bios_event_log_end;
205 };
206 
207 struct tpm_chip_seqops {
208 	struct tpm_chip *chip;
209 	const struct seq_operations *seqops;
210 };
211 
212 struct tpm_chip {
213 	struct device dev;
214 	struct device devs;
215 	struct cdev cdev;
216 	struct cdev cdevs;
217 
218 	/* A driver callback under ops cannot be run unless ops_sem is held
219 	 * (sometimes implicitly, eg for the sysfs code). ops becomes null
220 	 * when the driver is unregistered, see tpm_try_get_ops.
221 	 */
222 	struct rw_semaphore ops_sem;
223 	const struct tpm_class_ops *ops;
224 
225 	struct tpm_bios_log log;
226 	struct tpm_chip_seqops bin_log_seqops;
227 	struct tpm_chip_seqops ascii_log_seqops;
228 
229 	unsigned int flags;
230 
231 	int dev_num;		/* /dev/tpm# */
232 	unsigned long is_open;	/* only one allowed */
233 
234 	char hwrng_name[64];
235 	struct hwrng hwrng;
236 
237 	struct mutex tpm_mutex;	/* tpm is processing */
238 
239 	unsigned long timeout_a; /* jiffies */
240 	unsigned long timeout_b; /* jiffies */
241 	unsigned long timeout_c; /* jiffies */
242 	unsigned long timeout_d; /* jiffies */
243 	bool timeout_adjusted;
244 	unsigned long duration[TPM_NUM_DURATIONS]; /* jiffies */
245 	bool duration_adjusted;
246 
247 	struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
248 
249 	const struct attribute_group *groups[3];
250 	unsigned int groups_cnt;
251 
252 	u16 active_banks[7];
253 #ifdef CONFIG_ACPI
254 	acpi_handle acpi_dev_handle;
255 	char ppi_version[TPM_PPI_VERSION_LEN + 1];
256 #endif /* CONFIG_ACPI */
257 
258 	struct tpm_space work_space;
259 	u32 nr_commands;
260 	u32 *cc_attrs_tbl;
261 
262 	/* active locality */
263 	int locality;
264 };
265 
266 #define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
267 
268 struct tpm_input_header {
269 	__be16	tag;
270 	__be32	length;
271 	__be32	ordinal;
272 } __packed;
273 
274 struct tpm_output_header {
275 	__be16	tag;
276 	__be32	length;
277 	__be32	return_code;
278 } __packed;
279 
280 #define TPM_TAG_RQU_COMMAND 193
281 
282 /* TPM2 specific constants. */
283 #define TPM2_SPACE_BUFFER_SIZE		16384 /* 16 kB */
284 
285 struct	stclear_flags_t {
286 	__be16	tag;
287 	u8	deactivated;
288 	u8	disableForceClear;
289 	u8	physicalPresence;
290 	u8	physicalPresenceLock;
291 	u8	bGlobalLock;
292 } __packed;
293 
294 struct	tpm_version_t {
295 	u8	Major;
296 	u8	Minor;
297 	u8	revMajor;
298 	u8	revMinor;
299 } __packed;
300 
301 struct	tpm_version_1_2_t {
302 	__be16	tag;
303 	u8	Major;
304 	u8	Minor;
305 	u8	revMajor;
306 	u8	revMinor;
307 } __packed;
308 
309 struct	timeout_t {
310 	__be32	a;
311 	__be32	b;
312 	__be32	c;
313 	__be32	d;
314 } __packed;
315 
316 struct duration_t {
317 	__be32	tpm_short;
318 	__be32	tpm_medium;
319 	__be32	tpm_long;
320 } __packed;
321 
322 struct permanent_flags_t {
323 	__be16	tag;
324 	u8	disable;
325 	u8	ownership;
326 	u8	deactivated;
327 	u8	readPubek;
328 	u8	disableOwnerClear;
329 	u8	allowMaintenance;
330 	u8	physicalPresenceLifetimeLock;
331 	u8	physicalPresenceHWEnable;
332 	u8	physicalPresenceCMDEnable;
333 	u8	CEKPUsed;
334 	u8	TPMpost;
335 	u8	TPMpostLock;
336 	u8	FIPS;
337 	u8	operator;
338 	u8	enableRevokeEK;
339 	u8	nvLocked;
340 	u8	readSRKPub;
341 	u8	tpmEstablished;
342 	u8	maintenanceDone;
343 	u8	disableFullDALogicInfo;
344 } __packed;
345 
346 typedef union {
347 	struct	permanent_flags_t perm_flags;
348 	struct	stclear_flags_t	stclear_flags;
349 	__u8	owned;
350 	__be32	num_pcrs;
351 	struct	tpm_version_t	tpm_version;
352 	struct	tpm_version_1_2_t tpm_version_1_2;
353 	__be32	manufacturer_id;
354 	struct timeout_t  timeout;
355 	struct duration_t duration;
356 } cap_t;
357 
358 enum tpm_capabilities {
359 	TPM_CAP_FLAG = 4,
360 	TPM_CAP_PROP = 5,
361 	TPM_CAP_VERSION_1_1 = 0x06,
362 	TPM_CAP_VERSION_1_2 = 0x1A,
363 };
364 
365 enum tpm_sub_capabilities {
366 	TPM_CAP_PROP_PCR = 0x101,
367 	TPM_CAP_PROP_MANUFACTURER = 0x103,
368 	TPM_CAP_FLAG_PERM = 0x108,
369 	TPM_CAP_FLAG_VOL = 0x109,
370 	TPM_CAP_PROP_OWNER = 0x111,
371 	TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
372 	TPM_CAP_PROP_TIS_DURATION = 0x120,
373 };
374 
375 typedef union {
376 	struct	tpm_input_header in;
377 	struct	tpm_output_header out;
378 } tpm_cmd_header;
379 
380 struct tpm_pcrread_out {
381 	u8	pcr_result[TPM_DIGEST_SIZE];
382 } __packed;
383 
384 struct tpm_pcrread_in {
385 	__be32	pcr_idx;
386 } __packed;
387 
388 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
389  * bytes, but 128 is still a relatively large number of random bytes and
390  * anything much bigger causes users of struct tpm_cmd_t to start getting
391  * compiler warnings about stack frame size. */
392 #define TPM_MAX_RNG_DATA	128
393 
394 struct tpm_getrandom_out {
395 	__be32 rng_data_len;
396 	u8     rng_data[TPM_MAX_RNG_DATA];
397 } __packed;
398 
399 struct tpm_getrandom_in {
400 	__be32 num_bytes;
401 } __packed;
402 
403 typedef union {
404 	struct	tpm_pcrread_in	pcrread_in;
405 	struct	tpm_pcrread_out	pcrread_out;
406 	struct	tpm_getrandom_in getrandom_in;
407 	struct	tpm_getrandom_out getrandom_out;
408 } tpm_cmd_params;
409 
410 struct tpm_cmd_t {
411 	tpm_cmd_header	header;
412 	tpm_cmd_params	params;
413 } __packed;
414 
415 
416 /* A string buffer type for constructing TPM commands. This is based on the
417  * ideas of string buffer code in security/keys/trusted.h but is heap based
418  * in order to keep the stack usage minimal.
419  */
420 
421 enum tpm_buf_flags {
422 	TPM_BUF_OVERFLOW	= BIT(0),
423 };
424 
425 struct tpm_buf {
426 	struct page *data_page;
427 	unsigned int flags;
428 	u8 *data;
429 };
430 
tpm_buf_reset(struct tpm_buf * buf,u16 tag,u32 ordinal)431 static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
432 {
433 	struct tpm_input_header *head;
434 	head = (struct tpm_input_header *)buf->data;
435 	head->tag = cpu_to_be16(tag);
436 	head->length = cpu_to_be32(sizeof(*head));
437 	head->ordinal = cpu_to_be32(ordinal);
438 }
439 
tpm_buf_init(struct tpm_buf * buf,u16 tag,u32 ordinal)440 static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
441 {
442 	buf->data_page = alloc_page(GFP_HIGHUSER);
443 	if (!buf->data_page)
444 		return -ENOMEM;
445 
446 	buf->flags = 0;
447 	buf->data = kmap(buf->data_page);
448 	tpm_buf_reset(buf, tag, ordinal);
449 	return 0;
450 }
451 
tpm_buf_destroy(struct tpm_buf * buf)452 static inline void tpm_buf_destroy(struct tpm_buf *buf)
453 {
454 	kunmap(buf->data_page);
455 	__free_page(buf->data_page);
456 }
457 
tpm_buf_length(struct tpm_buf * buf)458 static inline u32 tpm_buf_length(struct tpm_buf *buf)
459 {
460 	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
461 
462 	return be32_to_cpu(head->length);
463 }
464 
tpm_buf_tag(struct tpm_buf * buf)465 static inline u16 tpm_buf_tag(struct tpm_buf *buf)
466 {
467 	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
468 
469 	return be16_to_cpu(head->tag);
470 }
471 
tpm_buf_append(struct tpm_buf * buf,const unsigned char * new_data,unsigned int new_len)472 static inline void tpm_buf_append(struct tpm_buf *buf,
473 				  const unsigned char *new_data,
474 				  unsigned int new_len)
475 {
476 	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
477 	u32 len = tpm_buf_length(buf);
478 
479 	/* Return silently if overflow has already happened. */
480 	if (buf->flags & TPM_BUF_OVERFLOW)
481 		return;
482 
483 	if ((len + new_len) > PAGE_SIZE) {
484 		WARN(1, "tpm_buf: overflow\n");
485 		buf->flags |= TPM_BUF_OVERFLOW;
486 		return;
487 	}
488 
489 	memcpy(&buf->data[len], new_data, new_len);
490 	head->length = cpu_to_be32(len + new_len);
491 }
492 
tpm_buf_append_u8(struct tpm_buf * buf,const u8 value)493 static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
494 {
495 	tpm_buf_append(buf, &value, 1);
496 }
497 
tpm_buf_append_u16(struct tpm_buf * buf,const u16 value)498 static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
499 {
500 	__be16 value2 = cpu_to_be16(value);
501 
502 	tpm_buf_append(buf, (u8 *) &value2, 2);
503 }
504 
tpm_buf_append_u32(struct tpm_buf * buf,const u32 value)505 static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
506 {
507 	__be32 value2 = cpu_to_be32(value);
508 
509 	tpm_buf_append(buf, (u8 *) &value2, 4);
510 }
511 
512 extern struct class *tpm_class;
513 extern struct class *tpmrm_class;
514 extern dev_t tpm_devt;
515 extern const struct file_operations tpm_fops;
516 extern const struct file_operations tpmrm_fops;
517 extern struct idr dev_nums_idr;
518 
519 /**
520  * enum tpm_transmit_flags - flags for tpm_transmit()
521  *
522  * @TPM_TRANSMIT_UNLOCKED:	do not lock the chip
523  * @TPM_TRANSMIT_NESTED:	discard setup steps (power management,
524  *				locality) including locking (i.e. implicit
525  *				UNLOCKED)
526  */
527 enum tpm_transmit_flags {
528 	TPM_TRANSMIT_UNLOCKED	= BIT(0),
529 	TPM_TRANSMIT_NESTED      = BIT(1),
530 };
531 
532 ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
533 		     u8 *buf, size_t bufsiz, unsigned int flags);
534 ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
535 			 void *buf, size_t bufsiz,
536 			 size_t min_rsp_body_length, unsigned int flags,
537 			 const char *desc);
538 int tpm_startup(struct tpm_chip *chip);
539 ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
540 		   const char *desc, size_t min_cap_length);
541 int tpm_get_timeouts(struct tpm_chip *);
542 int tpm1_auto_startup(struct tpm_chip *chip);
543 int tpm_do_selftest(struct tpm_chip *chip);
544 unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
545 int tpm_pm_suspend(struct device *dev);
546 int tpm_pm_resume(struct device *dev);
547 
tpm_msleep(unsigned int delay_msec)548 static inline void tpm_msleep(unsigned int delay_msec)
549 {
550 	usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
551 		     delay_msec * 1000);
552 };
553 
554 struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
555 __must_check int tpm_try_get_ops(struct tpm_chip *chip);
556 void tpm_put_ops(struct tpm_chip *chip);
557 
558 struct tpm_chip *tpm_chip_alloc(struct device *dev,
559 				const struct tpm_class_ops *ops);
560 struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
561 				 const struct tpm_class_ops *ops);
562 int tpm_chip_register(struct tpm_chip *chip);
563 void tpm_chip_unregister(struct tpm_chip *chip);
564 
565 void tpm_sysfs_add_device(struct tpm_chip *chip);
566 
567 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
568 
569 #ifdef CONFIG_ACPI
570 extern void tpm_add_ppi(struct tpm_chip *chip);
571 #else
tpm_add_ppi(struct tpm_chip * chip)572 static inline void tpm_add_ppi(struct tpm_chip *chip)
573 {
574 }
575 #endif
576 
tpm2_rc_value(u32 rc)577 static inline u32 tpm2_rc_value(u32 rc)
578 {
579 	return (rc & BIT(7)) ? rc & 0xff : rc;
580 }
581 
582 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
583 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count,
584 		    struct tpm2_digest *digests);
585 int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
586 void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
587 			    unsigned int flags);
588 int tpm2_seal_trusted(struct tpm_chip *chip,
589 		      struct trusted_key_payload *payload,
590 		      struct trusted_key_options *options);
591 int tpm2_unseal_trusted(struct tpm_chip *chip,
592 			struct trusted_key_payload *payload,
593 			struct trusted_key_options *options);
594 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
595 			u32 *value, const char *desc);
596 
597 int tpm2_auto_startup(struct tpm_chip *chip);
598 void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
599 unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
600 int tpm2_probe(struct tpm_chip *chip);
601 int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
602 int tpm2_init_space(struct tpm_space *space, unsigned int buf_size);
603 void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
604 int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc,
605 		       u8 *cmd);
606 int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,
607 		      u32 cc, u8 *buf, size_t *bufsiz);
608 int tpm_devs_add(struct tpm_chip *chip);
609 void tpm_devs_remove(struct tpm_chip *chip);
610 
611 void tpm_bios_log_setup(struct tpm_chip *chip);
612 void tpm_bios_log_teardown(struct tpm_chip *chip);
613 #endif
614