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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 *
4 * Authors:
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Dave Safford <safford@watson.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
9 *
10 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
11 *
12 * Device driver for TCG/TCPA TPM (trusted platform module).
13 * Specifications at www.trustedcomputinggroup.org
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation, version 2 of the
18 * License.
19 *
20 */
21#include <linux/module.h>
22#include <linux/delay.h>
23#include <linux/fs.h>
24#include <linux/mutex.h>
25#include <linux/sched.h>
26#include <linux/miscdevice.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <linux/tpm.h>
30
31enum tpm_timeout {
32 TPM_TIMEOUT = 5, /* msecs */
33};
34
35/* TPM addresses */
36enum tpm_addr {
37 TPM_SUPERIO_ADDR = 0x2E,
38 TPM_ADDR = 0x4E,
39};
40
41#define TPM_WARN_DOING_SELFTEST 0x802
42#define TPM_ERR_DEACTIVATED 0x6
43#define TPM_ERR_DISABLED 0x7
44
45#define TPM_HEADER_SIZE 10
46extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
47 char *);
48extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
49 char *);
50extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
51 char *);
52extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
53 char *);
54extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
55 const char *, size_t);
56extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
57 char *);
58extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
59 char *);
60extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
61 char *);
62extern ssize_t tpm_show_temp_deactivated(struct device *,
63 struct device_attribute *attr, char *);
64extern ssize_t tpm_show_durations(struct device *,
65 struct device_attribute *attr, char *);
66extern ssize_t tpm_show_timeouts(struct device *,
67 struct device_attribute *attr, char *);
68
69struct tpm_chip;
70
71struct tpm_vendor_specific {
72 const u8 req_complete_mask;
73 const u8 req_complete_val;
74 const u8 req_canceled;
75 void __iomem *iobase; /* ioremapped address */
76 unsigned long base; /* TPM base address */
77
78 int irq;
79 int probed_irq;
80
81 int region_size;
82 int have_region;
83
84 int (*recv) (struct tpm_chip *, u8 *, size_t);
85 int (*send) (struct tpm_chip *, u8 *, size_t);
86 void (*cancel) (struct tpm_chip *);
87 u8 (*status) (struct tpm_chip *);
88 void (*release) (struct device *);
89 struct miscdevice miscdev;
90 struct attribute_group *attr_group;
91 struct list_head list;
92 int locality;
93 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
94 bool timeout_adjusted;
95 unsigned long duration[3]; /* jiffies */
96 bool duration_adjusted;
97
98 wait_queue_head_t read_queue;
99 wait_queue_head_t int_queue;
100};
101
102#define TPM_VID_INTEL 0x8086
103
104struct tpm_chip {
105 struct device *dev; /* Device stuff */
106
107 int dev_num; /* /dev/tpm# */
108 unsigned long is_open; /* only one allowed */
109 int time_expired;
110
111 /* Data passed to and from the tpm via the read/write calls */
112 u8 *data_buffer;
113 atomic_t data_pending;
114 struct mutex buffer_mutex;
115
116 struct timer_list user_read_timer; /* user needs to claim result */
117 struct work_struct work;
118 struct mutex tpm_mutex; /* tpm is processing */
119
120 struct tpm_vendor_specific vendor;
121
122 struct dentry **bios_dir;
123
124 struct list_head list;
125 void (*release) (struct device *);
126};
127
128#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
129
130static inline void tpm_chip_put(struct tpm_chip *chip)
131{
132 module_put(chip->dev->driver->owner);
133}
134
135static inline int tpm_read_index(int base, int index)
136{
137 outb(index, base);
138 return inb(base+1) & 0xFF;
139}
140
141static inline void tpm_write_index(int base, int index, int value)
142{
143 outb(index, base);
144 outb(value & 0xFF, base+1);
145}
146struct tpm_input_header {
147 __be16 tag;
148 __be32 length;
149 __be32 ordinal;
150}__attribute__((packed));
151
152struct tpm_output_header {
153 __be16 tag;
154 __be32 length;
155 __be32 return_code;
156}__attribute__((packed));
157
158struct stclear_flags_t {
159 __be16 tag;
160 u8 deactivated;
161 u8 disableForceClear;
162 u8 physicalPresence;
163 u8 physicalPresenceLock;
164 u8 bGlobalLock;
165}__attribute__((packed));
166
167struct tpm_version_t {
168 u8 Major;
169 u8 Minor;
170 u8 revMajor;
171 u8 revMinor;
172}__attribute__((packed));
173
174struct tpm_version_1_2_t {
175 __be16 tag;
176 u8 Major;
177 u8 Minor;
178 u8 revMajor;
179 u8 revMinor;
180}__attribute__((packed));
181
182struct timeout_t {
183 __be32 a;
184 __be32 b;
185 __be32 c;
186 __be32 d;
187}__attribute__((packed));
188
189struct duration_t {
190 __be32 tpm_short;
191 __be32 tpm_medium;
192 __be32 tpm_long;
193}__attribute__((packed));
194
195struct permanent_flags_t {
196 __be16 tag;
197 u8 disable;
198 u8 ownership;
199 u8 deactivated;
200 u8 readPubek;
201 u8 disableOwnerClear;
202 u8 allowMaintenance;
203 u8 physicalPresenceLifetimeLock;
204 u8 physicalPresenceHWEnable;
205 u8 physicalPresenceCMDEnable;
206 u8 CEKPUsed;
207 u8 TPMpost;
208 u8 TPMpostLock;
209 u8 FIPS;
210 u8 operator;
211 u8 enableRevokeEK;
212 u8 nvLocked;
213 u8 readSRKPub;
214 u8 tpmEstablished;
215 u8 maintenanceDone;
216 u8 disableFullDALogicInfo;
217}__attribute__((packed));
218
219typedef union {
220 struct permanent_flags_t perm_flags;
221 struct stclear_flags_t stclear_flags;
222 bool owned;
223 __be32 num_pcrs;
224 struct tpm_version_t tpm_version;
225 struct tpm_version_1_2_t tpm_version_1_2;
226 __be32 manufacturer_id;
227 struct timeout_t timeout;
228 struct duration_t duration;
229} cap_t;
230
231struct tpm_getcap_params_in {
232 __be32 cap;
233 __be32 subcap_size;
234 __be32 subcap;
235}__attribute__((packed));
236
237struct tpm_getcap_params_out {
238 __be32 cap_size;
239 cap_t cap;
240}__attribute__((packed));
241
242struct tpm_readpubek_params_out {
243 u8 algorithm[4];
244 u8 encscheme[2];
245 u8 sigscheme[2];
246 __be32 paramsize;
247 u8 parameters[12]; /*assuming RSA*/
248 __be32 keysize;
249 u8 modulus[256];
250 u8 checksum[20];
251}__attribute__((packed));
252
253typedef union {
254 struct tpm_input_header in;
255 struct tpm_output_header out;
256} tpm_cmd_header;
257
258#define TPM_DIGEST_SIZE 20
259struct tpm_pcrread_out {
260 u8 pcr_result[TPM_DIGEST_SIZE];
261}__attribute__((packed));
262
263struct tpm_pcrread_in {
264 __be32 pcr_idx;
265}__attribute__((packed));
266
267struct tpm_pcrextend_in {
268 __be32 pcr_idx;
269 u8 hash[TPM_DIGEST_SIZE];
270}__attribute__((packed));
271
272typedef union {
273 struct tpm_getcap_params_out getcap_out;
274 struct tpm_readpubek_params_out readpubek_out;
275 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
276 struct tpm_getcap_params_in getcap_in;
277 struct tpm_pcrread_in pcrread_in;
278 struct tpm_pcrread_out pcrread_out;
279 struct tpm_pcrextend_in pcrextend_in;
280} tpm_cmd_params;
281
282struct tpm_cmd_t {
283 tpm_cmd_header header;
284 tpm_cmd_params params;
285}__attribute__((packed));
286
287ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
288
289extern int tpm_get_timeouts(struct tpm_chip *);
290extern void tpm_gen_interrupt(struct tpm_chip *);
291extern int tpm_do_selftest(struct tpm_chip *);
292extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
293extern struct tpm_chip* tpm_register_hardware(struct device *,
294 const struct tpm_vendor_specific *);
295extern int tpm_open(struct inode *, struct file *);
296extern int tpm_release(struct inode *, struct file *);
297extern void tpm_dev_vendor_release(struct tpm_chip *);
298extern ssize_t tpm_write(struct file *, const char __user *, size_t,
299 loff_t *);
300extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
301extern void tpm_remove_hardware(struct device *);
302extern int tpm_pm_suspend(struct device *, pm_message_t);
303extern int tpm_pm_resume(struct device *);
304extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
305 wait_queue_head_t *);
306#ifdef CONFIG_ACPI
307extern struct dentry ** tpm_bios_log_setup(char *);
308extern void tpm_bios_log_teardown(struct dentry **);
309#else
310static inline struct dentry ** tpm_bios_log_setup(char *name)
311{
312 return NULL;
313}
314static inline void tpm_bios_log_teardown(struct dentry **dir)
315{
316}
317#endif