drivers/char/tpm/tpm.h

   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_HIERARCHY_CONTROL       = 0x0121,
 139         TPM2_CC_HIERARCHY_CHANGE_AUTH   = 0x0129,
 140         TPM2_CC_CREATE_PRIMARY          = 0x0131,
 141         TPM2_CC_SEQUENCE_COMPLETE       = 0x013E,
 142         TPM2_CC_SELF_TEST               = 0x0143,
 143         TPM2_CC_STARTUP                 = 0x0144,
 144         TPM2_CC_SHUTDOWN                = 0x0145,
 145         TPM2_CC_NV_READ                 = 0x014E,
 146         TPM2_CC_CREATE                  = 0x0153,
 147         TPM2_CC_LOAD                    = 0x0157,
 148         TPM2_CC_SEQUENCE_UPDATE         = 0x015C,
 149         TPM2_CC_UNSEAL                  = 0x015E,
 150         TPM2_CC_CONTEXT_LOAD            = 0x0161,
 151         TPM2_CC_CONTEXT_SAVE            = 0x0162,
 152         TPM2_CC_FLUSH_CONTEXT           = 0x0165,
 153         TPM2_CC_VERIFY_SIGNATURE        = 0x0177,
 154         TPM2_CC_GET_CAPABILITY          = 0x017A,
 155         TPM2_CC_GET_RANDOM              = 0x017B,
 156         TPM2_CC_PCR_READ                = 0x017E,
 157         TPM2_CC_PCR_EXTEND              = 0x0182,
 158         TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
 159         TPM2_CC_HASH_SEQUENCE_START     = 0x0186,
 160         TPM2_CC_CREATE_LOADED           = 0x0191,
 161         TPM2_CC_LAST                    = 0x0193, /* Spec 1.36 */
 162 };
 163
 164 enum tpm2_permanent_handles {
 165         TPM2_RS_PW              = 0x40000009,
 166 };
 167
 168 enum tpm2_capabilities {
 169         TPM2_CAP_HANDLES        = 1,
 170         TPM2_CAP_COMMANDS       = 2,
 171         TPM2_CAP_PCRS           = 5,
 172         TPM2_CAP_TPM_PROPERTIES = 6,
 173 };
 174
 175 enum tpm2_properties {
 176         TPM_PT_TOTAL_COMMANDS   = 0x0129,
 177 };
 178
 179 enum tpm2_startup_types {
 180         TPM2_SU_CLEAR   = 0x0000,
 181         TPM2_SU_STATE   = 0x0001,
 182 };
 183
 184 enum tpm2_cc_attrs {
 185         TPM2_CC_ATTR_CHANDLES   = 25,
 186         TPM2_CC_ATTR_RHANDLE    = 28,
 187 };
 188
 189 #define TPM_VID_INTEL    0x8086
 190 #define TPM_VID_WINBOND  0x1050
 191 #define TPM_VID_STM      0x104A
 192
 193 #define TPM_PPI_VERSION_LEN             3
 194
 195 struct tpm_space {
 196         u32 context_tbl[3];
 197         u8 *context_buf;
 198         u32 session_tbl[3];
 199         u8 *session_buf;
 200 };
 201
 202 enum tpm_chip_flags {
 203         TPM_CHIP_FLAG_TPM2              = BIT(1),
 204         TPM_CHIP_FLAG_IRQ               = BIT(2),
 205         TPM_CHIP_FLAG_VIRTUAL           = BIT(3),
 206         TPM_CHIP_FLAG_HAVE_TIMEOUTS     = BIT(4),
 207         TPM_CHIP_FLAG_ALWAYS_POWERED    = BIT(5),
 208 };
 209
 210 struct tpm_bios_log {
 211         void *bios_event_log;
 212         void *bios_event_log_end;
 213 };
 214
 215 struct tpm_chip_seqops {
 216         struct tpm_chip *chip;
 217         const struct seq_operations *seqops;
 218 };
 219
 220 struct tpm_chip {
 221         struct device dev;
 222         struct device devs;
 223         struct cdev cdev;
 224         struct cdev cdevs;
 225
 226         /* A driver callback under ops cannot be run unless ops_sem is held
 227          * (sometimes implicitly, eg for the sysfs code). ops becomes null
 228          * when the driver is unregistered, see tpm_try_get_ops.
 229          */
 230         struct rw_semaphore ops_sem;
 231         const struct tpm_class_ops *ops;
 232
 233         struct tpm_bios_log log;
 234         struct tpm_chip_seqops bin_log_seqops;
 235         struct tpm_chip_seqops ascii_log_seqops;
 236
 237         unsigned int flags;
 238
 239         int dev_num;            /* /dev/tpm# */
 240         unsigned long is_open;  /* only one allowed */
 241
 242         char hwrng_name[64];
 243         struct hwrng hwrng;
 244
 245         struct mutex tpm_mutex; /* tpm is processing */
 246
 247         unsigned long timeout_a; /* jiffies */
 248         unsigned long timeout_b; /* jiffies */
 249         unsigned long timeout_c; /* jiffies */
 250         unsigned long timeout_d; /* jiffies */
 251         bool timeout_adjusted;
 252         unsigned long duration[TPM_NUM_DURATIONS]; /* jiffies */
 253         bool duration_adjusted;
 254
 255         struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
 256
 257         const struct attribute_group *groups[3];
 258         unsigned int groups_cnt;
 259
 260         u16 active_banks[7];
 261 #ifdef CONFIG_ACPI
 262         acpi_handle acpi_dev_handle;
 263         char ppi_version[TPM_PPI_VERSION_LEN + 1];
 264 #endif /* CONFIG_ACPI */
 265
 266         struct tpm_space work_space;
 267         u32 nr_commands;
 268         u32 *cc_attrs_tbl;
 269
 270         /* active locality */
 271         int locality;
 272 };
 273
 274 #define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
 275
 276 struct tpm_header {
 277         __be16 tag;
 278         __be32 length;
 279         union {
 280                 __be32 ordinal;
 281                 __be32 return_code;
 282         };
 283 } __packed;
 284
 285 #define TPM_TAG_RQU_COMMAND 193
 286
 287 struct  stclear_flags_t {
 288         __be16  tag;
 289         u8      deactivated;
 290         u8      disableForceClear;
 291         u8      physicalPresence;
 292         u8      physicalPresenceLock;
 293         u8      bGlobalLock;
 294 } __packed;
 295
 296 struct  tpm_version_t {
 297         u8      Major;
 298         u8      Minor;
 299         u8      revMajor;
 300         u8      revMinor;
 301 } __packed;
 302
 303 struct  tpm_version_1_2_t {
 304         __be16  tag;
 305         u8      Major;
 306         u8      Minor;
 307         u8      revMajor;
 308         u8      revMinor;
 309 } __packed;
 310
 311 struct  timeout_t {
 312         __be32  a;
 313         __be32  b;
 314         __be32  c;
 315         __be32  d;
 316 } __packed;
 317
 318 struct duration_t {
 319         __be32  tpm_short;
 320         __be32  tpm_medium;
 321         __be32  tpm_long;
 322 } __packed;
 323
 324 struct permanent_flags_t {
 325         __be16  tag;
 326         u8      disable;
 327         u8      ownership;
 328         u8      deactivated;
 329         u8      readPubek;
 330         u8      disableOwnerClear;
 331         u8      allowMaintenance;
 332         u8      physicalPresenceLifetimeLock;
 333         u8      physicalPresenceHWEnable;
 334         u8      physicalPresenceCMDEnable;
 335         u8      CEKPUsed;
 336         u8      TPMpost;
 337         u8      TPMpostLock;
 338         u8      FIPS;
 339         u8      operator;
 340         u8      enableRevokeEK;
 341         u8      nvLocked;
 342         u8      readSRKPub;
 343         u8      tpmEstablished;
 344         u8      maintenanceDone;
 345         u8      disableFullDALogicInfo;
 346 } __packed;
 347
 348 typedef union {
 349         struct  permanent_flags_t perm_flags;
 350         struct  stclear_flags_t stclear_flags;
 351         __u8    owned;
 352         __be32  num_pcrs;
 353         struct  tpm_version_t   tpm_version;
 354         struct  tpm_version_1_2_t tpm_version_1_2;
 355         __be32  manufacturer_id;
 356         struct timeout_t  timeout;
 357         struct duration_t duration;
 358 } cap_t;
 359
 360 enum tpm_capabilities {
 361         TPM_CAP_FLAG = 4,
 362         TPM_CAP_PROP = 5,
 363         TPM_CAP_VERSION_1_1 = 0x06,
 364         TPM_CAP_VERSION_1_2 = 0x1A,
 365 };
 366
 367 enum tpm_sub_capabilities {
 368         TPM_CAP_PROP_PCR = 0x101,
 369         TPM_CAP_PROP_MANUFACTURER = 0x103,
 370         TPM_CAP_FLAG_PERM = 0x108,
 371         TPM_CAP_FLAG_VOL = 0x109,
 372         TPM_CAP_PROP_OWNER = 0x111,
 373         TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
 374         TPM_CAP_PROP_TIS_DURATION = 0x120,
 375 };
 376
 377
 378 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
 379  * bytes, but 128 is still a relatively large number of random bytes and
 380  * anything much bigger causes users of struct tpm_cmd_t to start getting
 381  * compiler warnings about stack frame size. */
 382 #define TPM_MAX_RNG_DATA        128
 383
 384 /* A string buffer type for constructing TPM commands. This is based on the
 385  * ideas of string buffer code in security/keys/trusted.h but is heap based
 386  * in order to keep the stack usage minimal.
 387  */
 388
 389 enum tpm_buf_flags {
 390         TPM_BUF_OVERFLOW        = BIT(0),
 391 };
 392
 393 struct tpm_buf {
 394         struct page *data_page;
 395         unsigned int flags;
 396         u8 *data;
 397 };
 398
 399 static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
 400 {
 401         struct tpm_header *head = (struct tpm_header *)buf->data;
 402
 403         head->tag = cpu_to_be16(tag);
 404         head->length = cpu_to_be32(sizeof(*head));
 405         head->ordinal = cpu_to_be32(ordinal);
 406 }
 407
 408 static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
 409 {
 410         buf->data_page = alloc_page(GFP_HIGHUSER);
 411         if (!buf->data_page)
 412                 return -ENOMEM;
 413
 414         buf->flags = 0;
 415         buf->data = kmap(buf->data_page);
 416         tpm_buf_reset(buf, tag, ordinal);
 417         return 0;
 418 }
 419
 420 static inline void tpm_buf_destroy(struct tpm_buf *buf)
 421 {
 422         kunmap(buf->data_page);
 423         __free_page(buf->data_page);
 424 }
 425
 426 static inline u32 tpm_buf_length(struct tpm_buf *buf)
 427 {
 428         struct tpm_header *head = (struct tpm_header *)buf->data;
 429
 430         return be32_to_cpu(head->length);
 431 }
 432
 433 static inline u16 tpm_buf_tag(struct tpm_buf *buf)
 434 {
 435         struct tpm_header *head = (struct tpm_header *)buf->data;
 436
 437         return be16_to_cpu(head->tag);
 438 }
 439
 440 static inline void tpm_buf_append(struct tpm_buf *buf,
 441                                   const unsigned char *new_data,
 442                                   unsigned int new_len)
 443 {
 444         struct tpm_header *head = (struct tpm_header *)buf->data;
 445         u32 len = tpm_buf_length(buf);
 446
 447         /* Return silently if overflow has already happened. */
 448         if (buf->flags & TPM_BUF_OVERFLOW)
 449                 return;
 450
 451         if ((len + new_len) > PAGE_SIZE) {
 452                 WARN(1, "tpm_buf: overflow\n");
 453                 buf->flags |= TPM_BUF_OVERFLOW;
 454                 return;
 455         }
 456
 457         memcpy(&buf->data[len], new_data, new_len);
 458         head->length = cpu_to_be32(len + new_len);
 459 }
 460
 461 static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
 462 {
 463         tpm_buf_append(buf, &value, 1);
 464 }
 465
 466 static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
 467 {
 468         __be16 value2 = cpu_to_be16(value);
 469
 470         tpm_buf_append(buf, (u8 *) &value2, 2);
 471 }
 472
 473 static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
 474 {
 475         __be32 value2 = cpu_to_be32(value);
 476
 477         tpm_buf_append(buf, (u8 *) &value2, 4);
 478 }
 479
 480 extern struct class *tpm_class;
 481 extern struct class *tpmrm_class;
 482 extern dev_t tpm_devt;
 483 extern const struct file_operations tpm_fops;
 484 extern const struct file_operations tpmrm_fops;
 485 extern struct idr dev_nums_idr;
 486
 487 /**
 488  * enum tpm_transmit_flags - flags for tpm_transmit()
 489  *
 490  * @TPM_TRANSMIT_UNLOCKED:      do not lock the chip
 491  * @TPM_TRANSMIT_NESTED:        discard setup steps (power management,
 492  *                              locality) including locking (i.e. implicit
 493  *                              UNLOCKED)
 494  */
 495 enum tpm_transmit_flags {
 496         TPM_TRANSMIT_UNLOCKED   = BIT(0),
 497         TPM_TRANSMIT_NESTED      = BIT(1),
 498 };
 499
 500 ssize_t tpm_transmit(struct tpm_chip *chip, struct tpm_space *space,
 501                      u8 *buf, size_t bufsiz, unsigned int flags);
 502 ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
 503                          struct tpm_buf *buf, size_t min_rsp_body_length,
 504                          unsigned int flags, const char *desc);
 505 int tpm_get_timeouts(struct tpm_chip *);
 506 int tpm_auto_startup(struct tpm_chip *chip);
 507
 508 int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr);
 509 int tpm1_auto_startup(struct tpm_chip *chip);
 510 int tpm1_do_selftest(struct tpm_chip *chip);
 511 int tpm1_get_timeouts(struct tpm_chip *chip);
 512 unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 513 int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash,
 514                     const char *log_msg);
 515 int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
 516 ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
 517                     const char *desc, size_t min_cap_length);
 518 int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
 519 unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 520 int tpm_pm_suspend(struct device *dev);
 521 int tpm_pm_resume(struct device *dev);
 522
 523 static inline void tpm_msleep(unsigned int delay_msec)
 524 {
 525         usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
 526                      delay_msec * 1000);
 527 };
 528
 529 struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
 530 __must_check int tpm_try_get_ops(struct tpm_chip *chip);
 531 void tpm_put_ops(struct tpm_chip *chip);
 532
 533 struct tpm_chip *tpm_chip_alloc(struct device *dev,
 534                                 const struct tpm_class_ops *ops);
 535 struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
 536                                  const struct tpm_class_ops *ops);
 537 int tpm_chip_register(struct tpm_chip *chip);
 538 void tpm_chip_unregister(struct tpm_chip *chip);
 539
 540 void tpm_sysfs_add_device(struct tpm_chip *chip);
 541
 542
 543 #ifdef CONFIG_ACPI
 544 extern void tpm_add_ppi(struct tpm_chip *chip);
 545 #else
 546 static inline void tpm_add_ppi(struct tpm_chip *chip)
 547 {
 548 }
 549 #endif
 550
 551 static inline u32 tpm2_rc_value(u32 rc)
 552 {
 553         return (rc & BIT(7)) ? rc & 0xff : rc;
 554 }
 555
 556 int tpm2_get_timeouts(struct tpm_chip *chip);
 557 int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
 558 int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, u32 count,
 559                     struct tpm2_digest *digests);
 560 int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
 561 void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
 562                             unsigned int flags);
 563 int tpm2_seal_trusted(struct tpm_chip *chip,
 564                       struct trusted_key_payload *payload,
 565                       struct trusted_key_options *options);
 566 int tpm2_unseal_trusted(struct tpm_chip *chip,
 567                         struct trusted_key_payload *payload,
 568                         struct trusted_key_options *options);
 569 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
 570                         u32 *value, const char *desc);
 571
 572 int tpm2_auto_startup(struct tpm_chip *chip);
 573 void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
 574 unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
 575 int tpm2_probe(struct tpm_chip *chip);
 576 int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
 577 int tpm2_init_space(struct tpm_space *space);
 578 void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
 579 int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc,
 580                        u8 *cmd);
 581 int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space,
 582                       u32 cc, void *buf, size_t *bufsiz);
 583
 584 int tpm_bios_log_setup(struct tpm_chip *chip);
 585 void tpm_bios_log_teardown(struct tpm_chip *chip);
 586 int tpm_dev_common_init(void);
 587 void tpm_dev_common_exit(void);
 588 #endif