472 lines
12 KiB
C
472 lines
12 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004 IBM Corporation
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* Copyright (C) 2015 Intel Corporation
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*
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd-devel@lists.sourceforge.net>
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*
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*/
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#ifndef __TPM_H__
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#define __TPM_H__
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/tpm.h>
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#include <linux/highmem.h>
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#include <linux/tpm_eventlog.h>
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#ifdef CONFIG_X86
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#include <asm/intel-family.h>
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#endif
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#define TPM_MINOR 224 /* officially assigned */
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#define TPM_BUFSIZE 4096
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#define TPM_NUM_DEVICES 65536
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#define TPM_RETRY 50
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enum tpm_timeout {
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TPM_TIMEOUT = 5, /* msecs */
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TPM_TIMEOUT_RETRY = 100, /* msecs */
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TPM_TIMEOUT_RANGE_US = 300, /* usecs */
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TPM_TIMEOUT_POLL = 1, /* msecs */
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TPM_TIMEOUT_USECS_MIN = 100, /* usecs */
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TPM_TIMEOUT_USECS_MAX = 500 /* usecs */
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};
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/* TPM addresses */
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enum tpm_addr {
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TPM_SUPERIO_ADDR = 0x2E,
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TPM_ADDR = 0x4E,
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};
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#define TPM_WARN_RETRY 0x800
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#define TPM_WARN_DOING_SELFTEST 0x802
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#define TPM_ERR_DEACTIVATED 0x6
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#define TPM_ERR_DISABLED 0x7
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#define TPM_ERR_INVALID_POSTINIT 38
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#define TPM_HEADER_SIZE 10
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enum tpm2_const {
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TPM2_PLATFORM_PCR = 24,
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TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
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};
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enum tpm2_timeouts {
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TPM2_TIMEOUT_A = 750,
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TPM2_TIMEOUT_B = 2000,
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TPM2_TIMEOUT_C = 200,
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TPM2_TIMEOUT_D = 30,
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TPM2_DURATION_SHORT = 20,
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TPM2_DURATION_MEDIUM = 750,
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TPM2_DURATION_LONG = 2000,
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TPM2_DURATION_LONG_LONG = 300000,
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TPM2_DURATION_DEFAULT = 120000,
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};
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enum tpm2_structures {
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TPM2_ST_NO_SESSIONS = 0x8001,
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TPM2_ST_SESSIONS = 0x8002,
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};
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/* Indicates from what layer of the software stack the error comes from */
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#define TSS2_RC_LAYER_SHIFT 16
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#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
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enum tpm2_return_codes {
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TPM2_RC_SUCCESS = 0x0000,
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TPM2_RC_HASH = 0x0083, /* RC_FMT1 */
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TPM2_RC_HANDLE = 0x008B,
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TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
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TPM2_RC_FAILURE = 0x0101,
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TPM2_RC_DISABLED = 0x0120,
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TPM2_RC_COMMAND_CODE = 0x0143,
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TPM2_RC_TESTING = 0x090A, /* RC_WARN */
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TPM2_RC_REFERENCE_H0 = 0x0910,
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TPM2_RC_RETRY = 0x0922,
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};
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enum tpm2_command_codes {
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TPM2_CC_FIRST = 0x011F,
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TPM2_CC_HIERARCHY_CONTROL = 0x0121,
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TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
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TPM2_CC_CREATE_PRIMARY = 0x0131,
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TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
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TPM2_CC_SELF_TEST = 0x0143,
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TPM2_CC_STARTUP = 0x0144,
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TPM2_CC_SHUTDOWN = 0x0145,
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TPM2_CC_NV_READ = 0x014E,
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TPM2_CC_CREATE = 0x0153,
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TPM2_CC_LOAD = 0x0157,
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TPM2_CC_SEQUENCE_UPDATE = 0x015C,
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TPM2_CC_UNSEAL = 0x015E,
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TPM2_CC_CONTEXT_LOAD = 0x0161,
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TPM2_CC_CONTEXT_SAVE = 0x0162,
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TPM2_CC_FLUSH_CONTEXT = 0x0165,
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TPM2_CC_VERIFY_SIGNATURE = 0x0177,
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TPM2_CC_GET_CAPABILITY = 0x017A,
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TPM2_CC_GET_RANDOM = 0x017B,
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TPM2_CC_PCR_READ = 0x017E,
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TPM2_CC_PCR_EXTEND = 0x0182,
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TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
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TPM2_CC_HASH_SEQUENCE_START = 0x0186,
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TPM2_CC_CREATE_LOADED = 0x0191,
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TPM2_CC_LAST = 0x0193, /* Spec 1.36 */
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};
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enum tpm2_permanent_handles {
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TPM2_RS_PW = 0x40000009,
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};
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enum tpm2_capabilities {
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TPM2_CAP_HANDLES = 1,
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TPM2_CAP_COMMANDS = 2,
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TPM2_CAP_PCRS = 5,
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TPM2_CAP_TPM_PROPERTIES = 6,
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};
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enum tpm2_properties {
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TPM_PT_TOTAL_COMMANDS = 0x0129,
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};
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enum tpm2_startup_types {
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TPM2_SU_CLEAR = 0x0000,
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TPM2_SU_STATE = 0x0001,
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};
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enum tpm2_cc_attrs {
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TPM2_CC_ATTR_CHANDLES = 25,
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TPM2_CC_ATTR_RHANDLE = 28,
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};
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#define TPM_VID_INTEL 0x8086
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#define TPM_VID_WINBOND 0x1050
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#define TPM_VID_STM 0x104A
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enum tpm_chip_flags {
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TPM_CHIP_FLAG_TPM2 = BIT(1),
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TPM_CHIP_FLAG_IRQ = BIT(2),
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TPM_CHIP_FLAG_VIRTUAL = BIT(3),
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TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
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TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
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};
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#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
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struct tpm_header {
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__be16 tag;
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__be32 length;
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union {
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__be32 ordinal;
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__be32 return_code;
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};
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} __packed;
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#define TPM_TAG_RQU_COMMAND 193
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struct stclear_flags_t {
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__be16 tag;
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u8 deactivated;
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u8 disableForceClear;
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u8 physicalPresence;
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u8 physicalPresenceLock;
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u8 bGlobalLock;
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} __packed;
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struct tpm_version_t {
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u8 Major;
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u8 Minor;
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u8 revMajor;
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u8 revMinor;
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} __packed;
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struct tpm_version_1_2_t {
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__be16 tag;
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u8 Major;
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u8 Minor;
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u8 revMajor;
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u8 revMinor;
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} __packed;
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struct timeout_t {
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__be32 a;
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__be32 b;
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__be32 c;
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__be32 d;
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} __packed;
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struct duration_t {
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__be32 tpm_short;
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__be32 tpm_medium;
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__be32 tpm_long;
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} __packed;
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struct permanent_flags_t {
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__be16 tag;
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u8 disable;
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u8 ownership;
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u8 deactivated;
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u8 readPubek;
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u8 disableOwnerClear;
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u8 allowMaintenance;
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u8 physicalPresenceLifetimeLock;
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u8 physicalPresenceHWEnable;
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u8 physicalPresenceCMDEnable;
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u8 CEKPUsed;
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u8 TPMpost;
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u8 TPMpostLock;
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u8 FIPS;
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u8 operator;
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u8 enableRevokeEK;
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u8 nvLocked;
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u8 readSRKPub;
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u8 tpmEstablished;
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u8 maintenanceDone;
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u8 disableFullDALogicInfo;
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} __packed;
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typedef union {
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struct permanent_flags_t perm_flags;
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struct stclear_flags_t stclear_flags;
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__u8 owned;
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__be32 num_pcrs;
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struct tpm_version_t tpm_version;
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struct tpm_version_1_2_t tpm_version_1_2;
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__be32 manufacturer_id;
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struct timeout_t timeout;
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struct duration_t duration;
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} cap_t;
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enum tpm_capabilities {
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TPM_CAP_FLAG = 4,
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TPM_CAP_PROP = 5,
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TPM_CAP_VERSION_1_1 = 0x06,
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TPM_CAP_VERSION_1_2 = 0x1A,
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};
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enum tpm_sub_capabilities {
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TPM_CAP_PROP_PCR = 0x101,
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TPM_CAP_PROP_MANUFACTURER = 0x103,
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TPM_CAP_FLAG_PERM = 0x108,
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TPM_CAP_FLAG_VOL = 0x109,
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TPM_CAP_PROP_OWNER = 0x111,
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TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
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TPM_CAP_PROP_TIS_DURATION = 0x120,
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};
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/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
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* bytes, but 128 is still a relatively large number of random bytes and
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* anything much bigger causes users of struct tpm_cmd_t to start getting
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* compiler warnings about stack frame size. */
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#define TPM_MAX_RNG_DATA 128
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/* A string buffer type for constructing TPM commands. This is based on the
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* ideas of string buffer code in security/keys/trusted.h but is heap based
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* in order to keep the stack usage minimal.
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*/
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enum tpm_buf_flags {
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TPM_BUF_OVERFLOW = BIT(0),
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};
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struct tpm_buf {
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struct page *data_page;
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unsigned int flags;
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u8 *data;
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};
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static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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head->tag = cpu_to_be16(tag);
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head->length = cpu_to_be32(sizeof(*head));
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head->ordinal = cpu_to_be32(ordinal);
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}
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static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
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{
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buf->data_page = alloc_page(GFP_HIGHUSER);
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if (!buf->data_page)
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return -ENOMEM;
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buf->flags = 0;
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buf->data = kmap(buf->data_page);
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tpm_buf_reset(buf, tag, ordinal);
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return 0;
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}
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static inline void tpm_buf_destroy(struct tpm_buf *buf)
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{
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kunmap(buf->data_page);
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__free_page(buf->data_page);
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}
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static inline u32 tpm_buf_length(struct tpm_buf *buf)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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return be32_to_cpu(head->length);
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}
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static inline u16 tpm_buf_tag(struct tpm_buf *buf)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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return be16_to_cpu(head->tag);
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}
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static inline void tpm_buf_append(struct tpm_buf *buf,
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const unsigned char *new_data,
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unsigned int new_len)
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{
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struct tpm_header *head = (struct tpm_header *)buf->data;
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u32 len = tpm_buf_length(buf);
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/* Return silently if overflow has already happened. */
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if (buf->flags & TPM_BUF_OVERFLOW)
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return;
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if ((len + new_len) > PAGE_SIZE) {
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WARN(1, "tpm_buf: overflow\n");
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buf->flags |= TPM_BUF_OVERFLOW;
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return;
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}
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memcpy(&buf->data[len], new_data, new_len);
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head->length = cpu_to_be32(len + new_len);
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}
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static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
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{
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tpm_buf_append(buf, &value, 1);
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}
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static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
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{
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__be16 value2 = cpu_to_be16(value);
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tpm_buf_append(buf, (u8 *) &value2, 2);
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}
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static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
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{
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__be32 value2 = cpu_to_be32(value);
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tpm_buf_append(buf, (u8 *) &value2, 4);
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}
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||
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extern struct class *tpm_class;
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extern struct class *tpmrm_class;
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extern dev_t tpm_devt;
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extern const struct file_operations tpm_fops;
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extern const struct file_operations tpmrm_fops;
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extern struct idr dev_nums_idr;
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ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz);
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ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,
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size_t min_rsp_body_length, const char *desc);
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int tpm_get_timeouts(struct tpm_chip *);
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int tpm_auto_startup(struct tpm_chip *chip);
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int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr);
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int tpm1_auto_startup(struct tpm_chip *chip);
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int tpm1_do_selftest(struct tpm_chip *chip);
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||
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int tpm1_get_timeouts(struct tpm_chip *chip);
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||
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unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
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||
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int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash,
|
||
|
|
const char *log_msg);
|
||
|
|
int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
|
||
|
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ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
|
||
|
|
const char *desc, size_t min_cap_length);
|
||
|
|
int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
|
||
|
|
int tpm1_get_pcr_allocation(struct tpm_chip *chip);
|
||
|
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unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
|
||
|
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int tpm_pm_suspend(struct device *dev);
|
||
|
|
int tpm_pm_resume(struct device *dev);
|
||
|
|
|
||
|
|
static inline void tpm_msleep(unsigned int delay_msec)
|
||
|
|
{
|
||
|
|
usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
|
||
|
|
delay_msec * 1000);
|
||
|
|
};
|
||
|
|
|
||
|
|
int tpm_chip_start(struct tpm_chip *chip);
|
||
|
|
void tpm_chip_stop(struct tpm_chip *chip);
|
||
|
|
struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
|
||
|
|
__must_check int tpm_try_get_ops(struct tpm_chip *chip);
|
||
|
|
void tpm_put_ops(struct tpm_chip *chip);
|
||
|
|
|
||
|
|
struct tpm_chip *tpm_chip_alloc(struct device *dev,
|
||
|
|
const struct tpm_class_ops *ops);
|
||
|
|
struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
|
||
|
|
const struct tpm_class_ops *ops);
|
||
|
|
int tpm_chip_register(struct tpm_chip *chip);
|
||
|
|
void tpm_chip_unregister(struct tpm_chip *chip);
|
||
|
|
|
||
|
|
void tpm_sysfs_add_device(struct tpm_chip *chip);
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef CONFIG_ACPI
|
||
|
|
extern void tpm_add_ppi(struct tpm_chip *chip);
|
||
|
|
#else
|
||
|
|
static inline void tpm_add_ppi(struct tpm_chip *chip)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static inline u32 tpm2_rc_value(u32 rc)
|
||
|
|
{
|
||
|
|
return (rc & BIT(7)) ? rc & 0xff : rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
int tpm2_get_timeouts(struct tpm_chip *chip);
|
||
|
|
int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
|
||
|
|
struct tpm_digest *digest, u16 *digest_size_ptr);
|
||
|
|
int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
|
||
|
|
struct tpm_digest *digests);
|
||
|
|
int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
|
||
|
|
void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
|
||
|
|
int tpm2_seal_trusted(struct tpm_chip *chip,
|
||
|
|
struct trusted_key_payload *payload,
|
||
|
|
struct trusted_key_options *options);
|
||
|
|
int tpm2_unseal_trusted(struct tpm_chip *chip,
|
||
|
|
struct trusted_key_payload *payload,
|
||
|
|
struct trusted_key_options *options);
|
||
|
|
ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
|
||
|
|
u32 *value, const char *desc);
|
||
|
|
|
||
|
|
ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip);
|
||
|
|
int tpm2_auto_startup(struct tpm_chip *chip);
|
||
|
|
void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
|
||
|
|
unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
|
||
|
|
int tpm2_probe(struct tpm_chip *chip);
|
||
|
|
int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
|
||
|
|
int tpm2_init_space(struct tpm_space *space);
|
||
|
|
void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
|
||
|
|
void tpm2_flush_space(struct tpm_chip *chip);
|
||
|
|
int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
|
||
|
|
size_t cmdsiz);
|
||
|
|
int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf,
|
||
|
|
size_t *bufsiz);
|
||
|
|
|
||
|
|
int tpm_bios_log_setup(struct tpm_chip *chip);
|
||
|
|
void tpm_bios_log_teardown(struct tpm_chip *chip);
|
||
|
|
int tpm_dev_common_init(void);
|
||
|
|
void tpm_dev_common_exit(void);
|
||
|
|
#endif
|