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/*
* Copyright (C) 2004 IBM Corporation
* Copyright (C) 2015 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
* Dave Safford <safford@watson.ibm.com>
* Reiner Sailer <sailer@watson.ibm.com>
* Kylene Hall <kjhall@us.ibm.com>
*
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
*
* Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org
*
* 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 __TPM_H__
#define __TPM_H__
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
#include <linux/highmem.h>
#include <linux/tpm_eventlog.h>
#ifdef CONFIG_X86
#include <asm/intel-family.h>
#endif
#define TPM_MINOR 224 /* officially assigned */
#define TPM_BUFSIZE 4096
#define TPM_NUM_DEVICES 65536
#define TPM_RETRY 50
enum tpm_timeout {
TPM_TIMEOUT = 5, /* msecs */
TPM_TIMEOUT_RETRY = 100, /* msecs */
TPM_TIMEOUT_RANGE_US = 300, /* usecs */
TPM_TIMEOUT_POLL = 1, /* msecs */
TPM_TIMEOUT_USECS_MIN = 100, /* usecs */
TPM_TIMEOUT_USECS_MAX = 500 /* usecs */
};
/* TPM addresses */
enum tpm_addr {
TPM_SUPERIO_ADDR = 0x2E,
TPM_ADDR = 0x4E,
};
#define TPM_WARN_RETRY 0x800
#define TPM_WARN_DOING_SELFTEST 0x802
#define TPM_ERR_DEACTIVATED 0x6
#define TPM_ERR_DISABLED 0x7
#define TPM_ERR_INVALID_POSTINIT 38
#define TPM_HEADER_SIZE 10
enum tpm2_const {
TPM2_PLATFORM_PCR = 24,
TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
};
enum tpm2_timeouts {
TPM2_TIMEOUT_A = 750,
TPM2_TIMEOUT_B = 2000,
TPM2_TIMEOUT_C = 200,
TPM2_TIMEOUT_D = 30,
TPM2_DURATION_SHORT = 20,
TPM2_DURATION_MEDIUM = 750,
TPM2_DURATION_LONG = 2000,
TPM2_DURATION_LONG_LONG = 300000,
TPM2_DURATION_DEFAULT = 120000,
};
enum tpm2_structures {
TPM2_ST_NO_SESSIONS = 0x8001,
TPM2_ST_SESSIONS = 0x8002,
};
/* Indicates from what layer of the software stack the error comes from */
#define TSS2_RC_LAYER_SHIFT 16
#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
enum tpm2_return_codes {
TPM2_RC_SUCCESS = 0x0000,
TPM2_RC_HASH = 0x0083, /* RC_FMT1 */
TPM2_RC_HANDLE = 0x008B,
TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
TPM2_RC_FAILURE = 0x0101,
TPM2_RC_DISABLED = 0x0120,
TPM2_RC_COMMAND_CODE = 0x0143,
TPM2_RC_TESTING = 0x090A, /* RC_WARN */
TPM2_RC_REFERENCE_H0 = 0x0910,
TPM2_RC_RETRY = 0x0922,
};
enum tpm2_command_codes {
TPM2_CC_FIRST = 0x011F,
TPM2_CC_HIERARCHY_CONTROL = 0x0121,
TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
TPM2_CC_CREATE_PRIMARY = 0x0131,
TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
TPM2_CC_SELF_TEST = 0x0143,
TPM2_CC_STARTUP = 0x0144,
TPM2_CC_SHUTDOWN = 0x0145,
TPM2_CC_NV_READ = 0x014E,
TPM2_CC_CREATE = 0x0153,
TPM2_CC_LOAD = 0x0157,
TPM2_CC_SEQUENCE_UPDATE = 0x015C,
TPM2_CC_UNSEAL = 0x015E,
TPM2_CC_CONTEXT_LOAD = 0x0161,
TPM2_CC_CONTEXT_SAVE = 0x0162,
TPM2_CC_FLUSH_CONTEXT = 0x0165,
TPM2_CC_VERIFY_SIGNATURE = 0x0177,
TPM2_CC_GET_CAPABILITY = 0x017A,
TPM2_CC_GET_RANDOM = 0x017B,
TPM2_CC_PCR_READ = 0x017E,
TPM2_CC_PCR_EXTEND = 0x0182,
TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
TPM2_CC_HASH_SEQUENCE_START = 0x0186,
TPM2_CC_CREATE_LOADED = 0x0191,
TPM2_CC_LAST = 0x0193, /* Spec 1.36 */
};
enum tpm2_permanent_handles {
TPM2_RS_PW = 0x40000009,
};
enum tpm2_capabilities {
TPM2_CAP_HANDLES = 1,
TPM2_CAP_COMMANDS = 2,
TPM2_CAP_PCRS = 5,
TPM2_CAP_TPM_PROPERTIES = 6,
};
enum tpm2_properties {
TPM_PT_TOTAL_COMMANDS = 0x0129,
};
enum tpm2_startup_types {
TPM2_SU_CLEAR = 0x0000,
TPM2_SU_STATE = 0x0001,
};
enum tpm2_cc_attrs {
TPM2_CC_ATTR_CHANDLES = 25,
TPM2_CC_ATTR_RHANDLE = 28,
};
#define TPM_VID_INTEL 0x8086
#define TPM_VID_WINBOND 0x1050
#define TPM_VID_STM 0x104A
enum tpm_chip_flags {
TPM_CHIP_FLAG_TPM2 = BIT(1),
TPM_CHIP_FLAG_IRQ = BIT(2),
TPM_CHIP_FLAG_VIRTUAL = BIT(3),
TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
};
#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
struct tpm_header {
__be16 tag;
__be32 length;
union {
__be32 ordinal;
__be32 return_code;
};
} __packed;
#define TPM_TAG_RQU_COMMAND 193
struct stclear_flags_t {
__be16 tag;
u8 deactivated;
u8 disableForceClear;
u8 physicalPresence;
u8 physicalPresenceLock;
u8 bGlobalLock;
} __packed;
struct tpm_version_t {
u8 Major;
u8 Minor;
u8 revMajor;
u8 revMinor;
} __packed;
struct tpm_version_1_2_t {
__be16 tag;
u8 Major;
u8 Minor;
u8 revMajor;
u8 revMinor;
} __packed;
struct timeout_t {
__be32 a;
__be32 b;
__be32 c;
__be32 d;
} __packed;
struct duration_t {
__be32 tpm_short;
__be32 tpm_medium;
__be32 tpm_long;
} __packed;
struct permanent_flags_t {
__be16 tag;
u8 disable;
u8 ownership;
u8 deactivated;
u8 readPubek;
u8 disableOwnerClear;
u8 allowMaintenance;
u8 physicalPresenceLifetimeLock;
u8 physicalPresenceHWEnable;
u8 physicalPresenceCMDEnable;
u8 CEKPUsed;
u8 TPMpost;
u8 TPMpostLock;
u8 FIPS;
u8 operator;
u8 enableRevokeEK;
u8 nvLocked;
u8 readSRKPub;
u8 tpmEstablished;
u8 maintenanceDone;
u8 disableFullDALogicInfo;
} __packed;
typedef union {
struct permanent_flags_t perm_flags;
struct stclear_flags_t stclear_flags;
__u8 owned;
__be32 num_pcrs;
struct tpm_version_t tpm_version;
struct tpm_version_1_2_t tpm_version_1_2;
__be32 manufacturer_id;
struct timeout_t timeout;
struct duration_t duration;
} cap_t;
enum tpm_capabilities {
TPM_CAP_FLAG = 4,
TPM_CAP_PROP = 5,
TPM_CAP_VERSION_1_1 = 0x06,
TPM_CAP_VERSION_1_2 = 0x1A,
};
enum tpm_sub_capabilities {
TPM_CAP_PROP_PCR = 0x101,
TPM_CAP_PROP_MANUFACTURER = 0x103,
TPM_CAP_FLAG_PERM = 0x108,
TPM_CAP_FLAG_VOL = 0x109,
TPM_CAP_PROP_OWNER = 0x111,
TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
TPM_CAP_PROP_TIS_DURATION = 0x120,
};
/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
* bytes, but 128 is still a relatively large number of random bytes and
* anything much bigger causes users of struct tpm_cmd_t to start getting
* compiler warnings about stack frame size. */
#define TPM_MAX_RNG_DATA 128
/* A string buffer type for constructing TPM commands. This is based on the
* ideas of string buffer code in security/keys/trusted.h but is heap based
* in order to keep the stack usage minimal.
*/
enum tpm_buf_flags {
TPM_BUF_OVERFLOW = BIT(0),
};
struct tpm_buf {
struct page *data_page;
unsigned int flags;
u8 *data;
};
static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
{
struct tpm_header *head = (struct tpm_header *)buf->data;
head->tag = cpu_to_be16(tag);
head->length = cpu_to_be32(sizeof(*head));
head->ordinal = cpu_to_be32(ordinal);
}
static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
{
buf->data_page = alloc_page(GFP_HIGHUSER);
if (!buf->data_page)
return -ENOMEM;
buf->flags = 0;
buf->data = kmap(buf->data_page);
tpm_buf_reset(buf, tag, ordinal);
return 0;
}
static inline void tpm_buf_destroy(struct tpm_buf *buf)
{
kunmap(buf->data_page);
__free_page(buf->data_page);
}
static inline u32 tpm_buf_length(struct tpm_buf *buf)
{
struct tpm_header *head
|