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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2004 IBM Corporation
4 * Copyright (C) 2015 Intel Corporation
5 *
6 * Authors:
7 * Leendert van Doorn <leendert@watson.ibm.com>
8 * Dave Safford <safford@watson.ibm.com>
9 * Reiner Sailer <sailer@watson.ibm.com>
10 * Kylene Hall <kjhall@us.ibm.com>
11 *
12 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
13 *
14 * Device driver for TCG/TCPA TPM (trusted platform module).
15 * Specifications at www.trustedcomputinggroup.org
16 */
17
18#ifndef __TPM_H__
19#define __TPM_H__
20
21#include <linux/module.h>
22#include <linux/delay.h>
23#include <linux/mutex.h>
24#include <linux/sched.h>
25#include <linux/platform_device.h>
26#include <linux/io.h>
27#include <linux/tpm.h>
28#include <linux/tpm_eventlog.h>
29
30#ifdef CONFIG_X86
31#include <asm/intel-family.h>
32#endif
33
34#define TPM_MINOR 224 /* officially assigned */
35#define TPM_BUFSIZE 4096
36#define TPM_NUM_DEVICES 65536
37#define TPM_RETRY 50
38
39enum tpm_timeout {
40 TPM_TIMEOUT = 5, /* msecs */
41 TPM_TIMEOUT_RETRY = 100, /* msecs */
42 TPM_TIMEOUT_RANGE_US = 300, /* usecs */
43 TPM_TIMEOUT_POLL = 1, /* msecs */
44 TPM_TIMEOUT_USECS_MIN = 100, /* usecs */
45 TPM_TIMEOUT_USECS_MAX = 500 /* usecs */
46};
47
48/* TPM addresses */
49enum tpm_addr {
50 TPM_SUPERIO_ADDR = 0x2E,
51 TPM_ADDR = 0x4E,
52};
53
54#define TPM_WARN_RETRY 0x800
55#define TPM_WARN_DOING_SELFTEST 0x802
56#define TPM_ERR_DEACTIVATED 0x6
57#define TPM_ERR_DISABLED 0x7
58#define TPM_ERR_FAILEDSELFTEST 0x1C
59#define TPM_ERR_INVALID_POSTINIT 38
60
61#define TPM_TAG_RQU_COMMAND 193
62
63/* TPM2 specific constants. */
64#define TPM2_SPACE_BUFFER_SIZE 16384 /* 16 kB */
65
66struct stclear_flags_t {
67 __be16 tag;
68 u8 deactivated;
69 u8 disableForceClear;
70 u8 physicalPresence;
71 u8 physicalPresenceLock;
72 u8 bGlobalLock;
73} __packed;
74
75struct tpm1_version {
76 u8 major;
77 u8 minor;
78 u8 rev_major;
79 u8 rev_minor;
80} __packed;
81
82struct tpm1_version2 {
83 __be16 tag;
84 struct tpm1_version version;
85} __packed;
86
87struct timeout_t {
88 __be32 a;
89 __be32 b;
90 __be32 c;
91 __be32 d;
92} __packed;
93
94struct duration_t {
95 __be32 tpm_short;
96 __be32 tpm_medium;
97 __be32 tpm_long;
98} __packed;
99
100struct permanent_flags_t {
101 __be16 tag;
102 u8 disable;
103 u8 ownership;
104 u8 deactivated;
105 u8 readPubek;
106 u8 disableOwnerClear;
107 u8 allowMaintenance;
108 u8 physicalPresenceLifetimeLock;
109 u8 physicalPresenceHWEnable;
110 u8 physicalPresenceCMDEnable;
111 u8 CEKPUsed;
112 u8 TPMpost;
113 u8 TPMpostLock;
114 u8 FIPS;
115 u8 operator;
116 u8 enableRevokeEK;
117 u8 nvLocked;
118 u8 readSRKPub;
119 u8 tpmEstablished;
120 u8 maintenanceDone;
121 u8 disableFullDALogicInfo;
122} __packed;
123
124typedef union {
125 struct permanent_flags_t perm_flags;
126 struct stclear_flags_t stclear_flags;
127 __u8 owned;
128 __be32 num_pcrs;
129 struct tpm1_version version1;
130 struct tpm1_version2 version2;
131 __be32 manufacturer_id;
132 struct timeout_t timeout;
133 struct duration_t duration;
134} cap_t;
135
136enum tpm_capabilities {
137 TPM_CAP_FLAG = 4,
138 TPM_CAP_PROP = 5,
139 TPM_CAP_VERSION_1_1 = 0x06,
140 TPM_CAP_VERSION_1_2 = 0x1A,
141};
142
143enum tpm_sub_capabilities {
144 TPM_CAP_PROP_PCR = 0x101,
145 TPM_CAP_PROP_MANUFACTURER = 0x103,
146 TPM_CAP_FLAG_PERM = 0x108,
147 TPM_CAP_FLAG_VOL = 0x109,
148 TPM_CAP_PROP_OWNER = 0x111,
149 TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
150 TPM_CAP_PROP_TIS_DURATION = 0x120,
151};
152
153enum tpm2_pt_props {
154 TPM2_PT_NONE = 0x00000000,
155 TPM2_PT_GROUP = 0x00000100,
156 TPM2_PT_FIXED = TPM2_PT_GROUP * 1,
157 TPM2_PT_FAMILY_INDICATOR = TPM2_PT_FIXED + 0,
158 TPM2_PT_LEVEL = TPM2_PT_FIXED + 1,
159 TPM2_PT_REVISION = TPM2_PT_FIXED + 2,
160 TPM2_PT_DAY_OF_YEAR = TPM2_PT_FIXED + 3,
161 TPM2_PT_YEAR = TPM2_PT_FIXED + 4,
162 TPM2_PT_MANUFACTURER = TPM2_PT_FIXED + 5,
163 TPM2_PT_VENDOR_STRING_1 = TPM2_PT_FIXED + 6,
164 TPM2_PT_VENDOR_STRING_2 = TPM2_PT_FIXED + 7,
165 TPM2_PT_VENDOR_STRING_3 = TPM2_PT_FIXED + 8,
166 TPM2_PT_VENDOR_STRING_4 = TPM2_PT_FIXED + 9,
167 TPM2_PT_VENDOR_TPM_TYPE = TPM2_PT_FIXED + 10,
168 TPM2_PT_FIRMWARE_VERSION_1 = TPM2_PT_FIXED + 11,
169 TPM2_PT_FIRMWARE_VERSION_2 = TPM2_PT_FIXED + 12,
170 TPM2_PT_INPUT_BUFFER = TPM2_PT_FIXED + 13,
171 TPM2_PT_HR_TRANSIENT_MIN = TPM2_PT_FIXED + 14,
172 TPM2_PT_HR_PERSISTENT_MIN = TPM2_PT_FIXED + 15,
173 TPM2_PT_HR_LOADED_MIN = TPM2_PT_FIXED + 16,
174 TPM2_PT_ACTIVE_SESSIONS_MAX = TPM2_PT_FIXED + 17,
175 TPM2_PT_PCR_COUNT = TPM2_PT_FIXED + 18,
176 TPM2_PT_PCR_SELECT_MIN = TPM2_PT_FIXED + 19,
177 TPM2_PT_CONTEXT_GAP_MAX = TPM2_PT_FIXED + 20,
178 TPM2_PT_NV_COUNTERS_MAX = TPM2_PT_FIXED + 22,
179 TPM2_PT_NV_INDEX_MAX = TPM2_PT_FIXED + 23,
180 TPM2_PT_MEMORY = TPM2_PT_FIXED + 24,
181 TPM2_PT_CLOCK_UPDATE = TPM2_PT_FIXED + 25,
182 TPM2_PT_CONTEXT_HASH = TPM2_PT_FIXED + 26,
183 TPM2_PT_CONTEXT_SYM = TPM2_PT_FIXED + 27,
184 TPM2_PT_CONTEXT_SYM_SIZE = TPM2_PT_FIXED + 28,
185 TPM2_PT_ORDERLY_COUNT = TPM2_PT_FIXED + 29,
186 TPM2_PT_MAX_COMMAND_SIZE = TPM2_PT_FIXED + 30,
187 TPM2_PT_MAX_RESPONSE_SIZE = TPM2_PT_FIXED + 31,
188 TPM2_PT_MAX_DIGEST = TPM2_PT_FIXED + 32,
189 TPM2_PT_MAX_OBJECT_CONTEXT = TPM2_PT_FIXED + 33,
190 TPM2_PT_MAX_SESSION_CONTEXT = TPM2_PT_FIXED + 34,
191 TPM2_PT_PS_FAMILY_INDICATOR = TPM2_PT_FIXED + 35,
192 TPM2_PT_PS_LEVEL = TPM2_PT_FIXED + 36,
193 TPM2_PT_PS_REVISION = TPM2_PT_FIXED + 37,
194 TPM2_PT_PS_DAY_OF_YEAR = TPM2_PT_FIXED + 38,
195 TPM2_PT_PS_YEAR = TPM2_PT_FIXED + 39,
196 TPM2_PT_SPLIT_MAX = TPM2_PT_FIXED + 40,
197 TPM2_PT_TOTAL_COMMANDS = TPM2_PT_FIXED + 41,
198 TPM2_PT_LIBRARY_COMMANDS = TPM2_PT_FIXED + 42,
199 TPM2_PT_VENDOR_COMMANDS = TPM2_PT_FIXED + 43,
200 TPM2_PT_NV_BUFFER_MAX = TPM2_PT_FIXED + 44,
201 TPM2_PT_MODES = TPM2_PT_FIXED + 45,
202 TPM2_PT_MAX_CAP_BUFFER = TPM2_PT_FIXED + 46,
203 TPM2_PT_VAR = TPM2_PT_GROUP * 2,
204 TPM2_PT_PERMANENT = TPM2_PT_VAR + 0,
205 TPM2_PT_STARTUP_CLEAR = TPM2_PT_VAR + 1,
206 TPM2_PT_HR_NV_INDEX = TPM2_PT_VAR + 2,
207 TPM2_PT_HR_LOADED = TPM2_PT_VAR + 3,
208 TPM2_PT_HR_LOADED_AVAIL = TPM2_PT_VAR + 4,
209 TPM2_PT_HR_ACTIVE = TPM2_PT_VAR + 5,
210 TPM2_PT_HR_ACTIVE_AVAIL = TPM2_PT_VAR + 6,
211 TPM2_PT_HR_TRANSIENT_AVAIL = TPM2_PT_VAR + 7,
212 TPM2_PT_HR_PERSISTENT = TPM2_PT_VAR + 8,
213 TPM2_PT_HR_PERSISTENT_AVAIL = TPM2_PT_VAR + 9,
214 TPM2_PT_NV_COUNTERS = TPM2_PT_VAR + 10,
215 TPM2_PT_NV_COUNTERS_AVAIL = TPM2_PT_VAR + 11,
216 TPM2_PT_ALGORITHM_SET = TPM2_PT_VAR + 12,
217 TPM2_PT_LOADED_CURVES = TPM2_PT_VAR + 13,
218 TPM2_PT_LOCKOUT_COUNTER = TPM2_PT_VAR + 14,
219 TPM2_PT_MAX_AUTH_FAIL = TPM2_PT_VAR + 15,
220 TPM2_PT_LOCKOUT_INTERVAL = TPM2_PT_VAR + 16,
221 TPM2_PT_LOCKOUT_RECOVERY = TPM2_PT_VAR + 17,
222 TPM2_PT_NV_WRITE_RECOVERY = TPM2_PT_VAR + 18,
223 TPM2_PT_AUDIT_COUNTER_0 = TPM2_PT_VAR + 19,
224 TPM2_PT_AUDIT_COUNTER_1 = TPM2_PT_VAR + 20,
225};
226
227/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
228 * bytes, but 128 is still a relatively large number of random bytes and
229 * anything much bigger causes users of struct tpm_cmd_t to start getting
230 * compiler warnings about stack frame size. */
231#define TPM_MAX_RNG_DATA 128
232
233extern const struct class tpm_class;
234extern const struct class tpmrm_class;
235extern dev_t tpm_devt;
236extern const struct file_operations tpm_fops;
237extern const struct file_operations tpmrm_fops;
238extern struct idr dev_nums_idr;
239
240ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz);
241int tpm_get_timeouts(struct tpm_chip *);
242int tpm_auto_startup(struct tpm_chip *chip);
243
244int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr);
245int tpm1_auto_startup(struct tpm_chip *chip);
246int tpm1_do_selftest(struct tpm_chip *chip);
247int tpm1_get_timeouts(struct tpm_chip *chip);
248unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
249int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash,
250 const char *log_msg);
251int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
252ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
253 const char *desc, size_t min_cap_length);
254int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
255int tpm1_get_pcr_allocation(struct tpm_chip *chip);
256unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
257int tpm_pm_suspend(struct device *dev);
258int tpm_pm_resume(struct device *dev);
259int tpm_class_shutdown(struct device *dev);
260
261static inline void tpm_msleep(unsigned int delay_msec)
262{
263 usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
264 delay_msec * 1000);
265};
266
267int tpm_chip_bootstrap(struct tpm_chip *chip);
268int tpm_chip_start(struct tpm_chip *chip);
269void tpm_chip_stop(struct tpm_chip *chip);
270struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
271
272struct tpm_chip *tpm_chip_alloc(struct device *dev,
273 const struct tpm_class_ops *ops);
274struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
275 const struct tpm_class_ops *ops);
276int tpm_chip_register(struct tpm_chip *chip);
277void tpm_chip_unregister(struct tpm_chip *chip);
278
279void tpm_sysfs_add_device(struct tpm_chip *chip);
280
281
282#ifdef CONFIG_ACPI
283extern void tpm_add_ppi(struct tpm_chip *chip);
284#else
285static inline void tpm_add_ppi(struct tpm_chip *chip)
286{
287}
288#endif
289
290int tpm2_get_timeouts(struct tpm_chip *chip);
291int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
292 struct tpm_digest *digest, u16 *digest_size_ptr);
293int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
294 struct tpm_digest *digests);
295int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
296ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
297 u32 *value, const char *desc);
298
299ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip);
300int tpm2_auto_startup(struct tpm_chip *chip);
301void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
302unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
303int tpm2_probe(struct tpm_chip *chip);
304int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip);
305int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
306int tpm2_init_space(struct tpm_space *space, unsigned int buf_size);
307void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
308void tpm2_flush_space(struct tpm_chip *chip);
309int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
310 size_t cmdsiz);
311int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf,
312 size_t *bufsiz);
313int tpm_devs_add(struct tpm_chip *chip);
314void tpm_devs_remove(struct tpm_chip *chip);
315
316void tpm_bios_log_setup(struct tpm_chip *chip);
317void tpm_bios_log_teardown(struct tpm_chip *chip);
318int tpm_dev_common_init(void);
319void tpm_dev_common_exit(void);
320#endif
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#include <linux/module.h>
23#include <linux/delay.h>
24#include <linux/fs.h>
25#include <linux/mutex.h>
26#include <linux/sched.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <linux/tpm.h>
30#include <linux/acpi.h>
31#include <linux/cdev.h>
32#include <linux/highmem.h>
33
34enum tpm_const {
35 TPM_MINOR = 224, /* officially assigned */
36 TPM_BUFSIZE = 4096,
37 TPM_NUM_DEVICES = 256,
38 TPM_RETRY = 50, /* 5 seconds */
39};
40
41enum tpm_timeout {
42 TPM_TIMEOUT = 5, /* msecs */
43 TPM_TIMEOUT_RETRY = 100 /* msecs */
44};
45
46/* TPM addresses */
47enum tpm_addr {
48 TPM_SUPERIO_ADDR = 0x2E,
49 TPM_ADDR = 0x4E,
50};
51
52/* Indexes the duration array */
53enum tpm_duration {
54 TPM_SHORT = 0,
55 TPM_MEDIUM = 1,
56 TPM_LONG = 2,
57 TPM_UNDEFINED,
58};
59
60#define TPM_WARN_RETRY 0x800
61#define TPM_WARN_DOING_SELFTEST 0x802
62#define TPM_ERR_DEACTIVATED 0x6
63#define TPM_ERR_DISABLED 0x7
64#define TPM_ERR_INVALID_POSTINIT 38
65
66#define TPM_HEADER_SIZE 10
67
68enum tpm2_const {
69 TPM2_PLATFORM_PCR = 24,
70 TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
71 TPM2_TIMEOUT_A = 750,
72 TPM2_TIMEOUT_B = 2000,
73 TPM2_TIMEOUT_C = 200,
74 TPM2_TIMEOUT_D = 30,
75 TPM2_DURATION_SHORT = 20,
76 TPM2_DURATION_MEDIUM = 750,
77 TPM2_DURATION_LONG = 2000,
78};
79
80enum tpm2_structures {
81 TPM2_ST_NO_SESSIONS = 0x8001,
82 TPM2_ST_SESSIONS = 0x8002,
83};
84
85enum tpm2_return_codes {
86 TPM2_RC_HASH = 0x0083, /* RC_FMT1 */
87 TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
88 TPM2_RC_DISABLED = 0x0120,
89 TPM2_RC_TESTING = 0x090A, /* RC_WARN */
90};
91
92enum tpm2_algorithms {
93 TPM2_ALG_SHA1 = 0x0004,
94 TPM2_ALG_KEYEDHASH = 0x0008,
95 TPM2_ALG_SHA256 = 0x000B,
96 TPM2_ALG_SHA384 = 0x000C,
97 TPM2_ALG_SHA512 = 0x000D,
98 TPM2_ALG_NULL = 0x0010,
99 TPM2_ALG_SM3_256 = 0x0012,
100};
101
102enum tpm2_command_codes {
103 TPM2_CC_FIRST = 0x011F,
104 TPM2_CC_SELF_TEST = 0x0143,
105 TPM2_CC_STARTUP = 0x0144,
106 TPM2_CC_SHUTDOWN = 0x0145,
107 TPM2_CC_CREATE = 0x0153,
108 TPM2_CC_LOAD = 0x0157,
109 TPM2_CC_UNSEAL = 0x015E,
110 TPM2_CC_FLUSH_CONTEXT = 0x0165,
111 TPM2_CC_GET_CAPABILITY = 0x017A,
112 TPM2_CC_GET_RANDOM = 0x017B,
113 TPM2_CC_PCR_READ = 0x017E,
114 TPM2_CC_PCR_EXTEND = 0x0182,
115 TPM2_CC_LAST = 0x018F,
116};
117
118enum tpm2_permanent_handles {
119 TPM2_RS_PW = 0x40000009,
120};
121
122enum tpm2_capabilities {
123 TPM2_CAP_TPM_PROPERTIES = 6,
124};
125
126enum tpm2_startup_types {
127 TPM2_SU_CLEAR = 0x0000,
128 TPM2_SU_STATE = 0x0001,
129};
130
131struct tpm_chip;
132
133struct tpm_vendor_specific {
134 void __iomem *iobase; /* ioremapped address */
135 unsigned long base; /* TPM base address */
136
137 int irq;
138
139 int region_size;
140 int have_region;
141
142 struct list_head list;
143 int locality;
144 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
145 bool timeout_adjusted;
146 unsigned long duration[3]; /* jiffies */
147 bool duration_adjusted;
148 void *priv;
149
150 wait_queue_head_t read_queue;
151 wait_queue_head_t int_queue;
152
153 u16 manufacturer_id;
154};
155
156#define TPM_VPRIV(c) ((c)->vendor.priv)
157
158#define TPM_VID_INTEL 0x8086
159#define TPM_VID_WINBOND 0x1050
160#define TPM_VID_STM 0x104A
161
162#define TPM_PPI_VERSION_LEN 3
163
164enum tpm_chip_flags {
165 TPM_CHIP_FLAG_REGISTERED = BIT(0),
166 TPM_CHIP_FLAG_TPM2 = BIT(1),
167};
168
169struct tpm_chip {
170 struct device *pdev; /* Device stuff */
171 struct device dev;
172 struct cdev cdev;
173
174 const struct tpm_class_ops *ops;
175 unsigned int flags;
176
177 int dev_num; /* /dev/tpm# */
178 char devname[7];
179 unsigned long is_open; /* only one allowed */
180 int time_expired;
181
182 struct mutex tpm_mutex; /* tpm is processing */
183
184 struct tpm_vendor_specific vendor;
185
186 struct dentry **bios_dir;
187
188#ifdef CONFIG_ACPI
189 const struct attribute_group *groups[2];
190 unsigned int groups_cnt;
191 acpi_handle acpi_dev_handle;
192 char ppi_version[TPM_PPI_VERSION_LEN + 1];
193#endif /* CONFIG_ACPI */
194
195 struct list_head list;
196};
197
198#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
199
200static inline void tpm_chip_put(struct tpm_chip *chip)
201{
202 module_put(chip->pdev->driver->owner);
203}
204
205static inline int tpm_read_index(int base, int index)
206{
207 outb(index, base);
208 return inb(base+1) & 0xFF;
209}
210
211static inline void tpm_write_index(int base, int index, int value)
212{
213 outb(index, base);
214 outb(value & 0xFF, base+1);
215}
216struct tpm_input_header {
217 __be16 tag;
218 __be32 length;
219 __be32 ordinal;
220} __packed;
221
222struct tpm_output_header {
223 __be16 tag;
224 __be32 length;
225 __be32 return_code;
226} __packed;
227
228#define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
229
230struct stclear_flags_t {
231 __be16 tag;
232 u8 deactivated;
233 u8 disableForceClear;
234 u8 physicalPresence;
235 u8 physicalPresenceLock;
236 u8 bGlobalLock;
237} __packed;
238
239struct tpm_version_t {
240 u8 Major;
241 u8 Minor;
242 u8 revMajor;
243 u8 revMinor;
244} __packed;
245
246struct tpm_version_1_2_t {
247 __be16 tag;
248 u8 Major;
249 u8 Minor;
250 u8 revMajor;
251 u8 revMinor;
252} __packed;
253
254struct timeout_t {
255 __be32 a;
256 __be32 b;
257 __be32 c;
258 __be32 d;
259} __packed;
260
261struct duration_t {
262 __be32 tpm_short;
263 __be32 tpm_medium;
264 __be32 tpm_long;
265} __packed;
266
267struct permanent_flags_t {
268 __be16 tag;
269 u8 disable;
270 u8 ownership;
271 u8 deactivated;
272 u8 readPubek;
273 u8 disableOwnerClear;
274 u8 allowMaintenance;
275 u8 physicalPresenceLifetimeLock;
276 u8 physicalPresenceHWEnable;
277 u8 physicalPresenceCMDEnable;
278 u8 CEKPUsed;
279 u8 TPMpost;
280 u8 TPMpostLock;
281 u8 FIPS;
282 u8 operator;
283 u8 enableRevokeEK;
284 u8 nvLocked;
285 u8 readSRKPub;
286 u8 tpmEstablished;
287 u8 maintenanceDone;
288 u8 disableFullDALogicInfo;
289} __packed;
290
291typedef union {
292 struct permanent_flags_t perm_flags;
293 struct stclear_flags_t stclear_flags;
294 bool owned;
295 __be32 num_pcrs;
296 struct tpm_version_t tpm_version;
297 struct tpm_version_1_2_t tpm_version_1_2;
298 __be32 manufacturer_id;
299 struct timeout_t timeout;
300 struct duration_t duration;
301} cap_t;
302
303enum tpm_capabilities {
304 TPM_CAP_FLAG = cpu_to_be32(4),
305 TPM_CAP_PROP = cpu_to_be32(5),
306 CAP_VERSION_1_1 = cpu_to_be32(0x06),
307 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
308};
309
310enum tpm_sub_capabilities {
311 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
312 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
313 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
314 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
315 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
316 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
317 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
318
319};
320
321struct tpm_getcap_params_in {
322 __be32 cap;
323 __be32 subcap_size;
324 __be32 subcap;
325} __packed;
326
327struct tpm_getcap_params_out {
328 __be32 cap_size;
329 cap_t cap;
330} __packed;
331
332struct tpm_readpubek_params_out {
333 u8 algorithm[4];
334 u8 encscheme[2];
335 u8 sigscheme[2];
336 __be32 paramsize;
337 u8 parameters[12]; /*assuming RSA*/
338 __be32 keysize;
339 u8 modulus[256];
340 u8 checksum[20];
341} __packed;
342
343typedef union {
344 struct tpm_input_header in;
345 struct tpm_output_header out;
346} tpm_cmd_header;
347
348struct tpm_pcrread_out {
349 u8 pcr_result[TPM_DIGEST_SIZE];
350} __packed;
351
352struct tpm_pcrread_in {
353 __be32 pcr_idx;
354} __packed;
355
356struct tpm_pcrextend_in {
357 __be32 pcr_idx;
358 u8 hash[TPM_DIGEST_SIZE];
359} __packed;
360
361/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
362 * bytes, but 128 is still a relatively large number of random bytes and
363 * anything much bigger causes users of struct tpm_cmd_t to start getting
364 * compiler warnings about stack frame size. */
365#define TPM_MAX_RNG_DATA 128
366
367struct tpm_getrandom_out {
368 __be32 rng_data_len;
369 u8 rng_data[TPM_MAX_RNG_DATA];
370} __packed;
371
372struct tpm_getrandom_in {
373 __be32 num_bytes;
374} __packed;
375
376struct tpm_startup_in {
377 __be16 startup_type;
378} __packed;
379
380typedef union {
381 struct tpm_getcap_params_out getcap_out;
382 struct tpm_readpubek_params_out readpubek_out;
383 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
384 struct tpm_getcap_params_in getcap_in;
385 struct tpm_pcrread_in pcrread_in;
386 struct tpm_pcrread_out pcrread_out;
387 struct tpm_pcrextend_in pcrextend_in;
388 struct tpm_getrandom_in getrandom_in;
389 struct tpm_getrandom_out getrandom_out;
390 struct tpm_startup_in startup_in;
391} tpm_cmd_params;
392
393struct tpm_cmd_t {
394 tpm_cmd_header header;
395 tpm_cmd_params params;
396} __packed;
397
398/* A string buffer type for constructing TPM commands. This is based on the
399 * ideas of string buffer code in security/keys/trusted.h but is heap based
400 * in order to keep the stack usage minimal.
401 */
402
403enum tpm_buf_flags {
404 TPM_BUF_OVERFLOW = BIT(0),
405};
406
407struct tpm_buf {
408 struct page *data_page;
409 unsigned int flags;
410 u8 *data;
411};
412
413static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
414{
415 struct tpm_input_header *head;
416
417 buf->data_page = alloc_page(GFP_HIGHUSER);
418 if (!buf->data_page)
419 return -ENOMEM;
420
421 buf->flags = 0;
422 buf->data = kmap(buf->data_page);
423
424 head = (struct tpm_input_header *) buf->data;
425
426 head->tag = cpu_to_be16(tag);
427 head->length = cpu_to_be32(sizeof(*head));
428 head->ordinal = cpu_to_be32(ordinal);
429
430 return 0;
431}
432
433static inline void tpm_buf_destroy(struct tpm_buf *buf)
434{
435 kunmap(buf->data_page);
436 __free_page(buf->data_page);
437}
438
439static inline u32 tpm_buf_length(struct tpm_buf *buf)
440{
441 struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
442
443 return be32_to_cpu(head->length);
444}
445
446static inline u16 tpm_buf_tag(struct tpm_buf *buf)
447{
448 struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
449
450 return be16_to_cpu(head->tag);
451}
452
453static inline void tpm_buf_append(struct tpm_buf *buf,
454 const unsigned char *new_data,
455 unsigned int new_len)
456{
457 struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
458 u32 len = tpm_buf_length(buf);
459
460 /* Return silently if overflow has already happened. */
461 if (buf->flags & TPM_BUF_OVERFLOW)
462 return;
463
464 if ((len + new_len) > PAGE_SIZE) {
465 WARN(1, "tpm_buf: overflow\n");
466 buf->flags |= TPM_BUF_OVERFLOW;
467 return;
468 }
469
470 memcpy(&buf->data[len], new_data, new_len);
471 head->length = cpu_to_be32(len + new_len);
472}
473
474static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
475{
476 tpm_buf_append(buf, &value, 1);
477}
478
479static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
480{
481 __be16 value2 = cpu_to_be16(value);
482
483 tpm_buf_append(buf, (u8 *) &value2, 2);
484}
485
486static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
487{
488 __be32 value2 = cpu_to_be32(value);
489
490 tpm_buf_append(buf, (u8 *) &value2, 4);
491}
492
493extern struct class *tpm_class;
494extern dev_t tpm_devt;
495extern const struct file_operations tpm_fops;
496
497ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
498ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
499 size_t bufsiz);
500ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
501 const char *desc);
502extern int tpm_get_timeouts(struct tpm_chip *);
503extern void tpm_gen_interrupt(struct tpm_chip *);
504extern int tpm_do_selftest(struct tpm_chip *);
505extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
506extern int tpm_pm_suspend(struct device *);
507extern int tpm_pm_resume(struct device *);
508extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
509 wait_queue_head_t *, bool);
510
511struct tpm_chip *tpm_chip_find_get(int chip_num);
512extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
513 const struct tpm_class_ops *ops);
514extern int tpm_chip_register(struct tpm_chip *chip);
515extern void tpm_chip_unregister(struct tpm_chip *chip);
516
517int tpm_sysfs_add_device(struct tpm_chip *chip);
518void tpm_sysfs_del_device(struct tpm_chip *chip);
519
520int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
521
522#ifdef CONFIG_ACPI
523extern void tpm_add_ppi(struct tpm_chip *chip);
524#else
525static inline void tpm_add_ppi(struct tpm_chip *chip)
526{
527}
528#endif
529
530int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
531int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
532int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
533int tpm2_seal_trusted(struct tpm_chip *chip,
534 struct trusted_key_payload *payload,
535 struct trusted_key_options *options);
536int tpm2_unseal_trusted(struct tpm_chip *chip,
537 struct trusted_key_payload *payload,
538 struct trusted_key_options *options);
539ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
540 u32 *value, const char *desc);
541
542extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
543extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
544extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
545extern int tpm2_do_selftest(struct tpm_chip *chip);
546extern int tpm2_gen_interrupt(struct tpm_chip *chip);
547extern int tpm2_probe(struct tpm_chip *chip);