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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_const {
32 TPM_MINOR = 224, /* officially assigned */
33 TPM_BUFSIZE = 4096,
34 TPM_NUM_DEVICES = 256,
35 TPM_RETRY = 50, /* 5 seconds */
36};
37
38enum tpm_timeout {
39 TPM_TIMEOUT = 5, /* msecs */
40 TPM_TIMEOUT_RETRY = 100 /* msecs */
41};
42
43/* TPM addresses */
44enum tpm_addr {
45 TPM_SUPERIO_ADDR = 0x2E,
46 TPM_ADDR = 0x4E,
47};
48
49/* Indexes the duration array */
50enum tpm_duration {
51 TPM_SHORT = 0,
52 TPM_MEDIUM = 1,
53 TPM_LONG = 2,
54 TPM_UNDEFINED,
55};
56
57#define TPM_WARN_RETRY 0x800
58#define TPM_WARN_DOING_SELFTEST 0x802
59#define TPM_ERR_DEACTIVATED 0x6
60#define TPM_ERR_DISABLED 0x7
61#define TPM_ERR_INVALID_POSTINIT 38
62
63#define TPM_HEADER_SIZE 10
64struct tpm_chip;
65
66struct tpm_vendor_specific {
67 void __iomem *iobase; /* ioremapped address */
68 unsigned long base; /* TPM base address */
69
70 int irq;
71 int probed_irq;
72
73 int region_size;
74 int have_region;
75
76 struct miscdevice miscdev;
77 struct list_head list;
78 int locality;
79 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
80 bool timeout_adjusted;
81 unsigned long duration[3]; /* jiffies */
82 bool duration_adjusted;
83 void *priv;
84
85 wait_queue_head_t read_queue;
86 wait_queue_head_t int_queue;
87
88 u16 manufacturer_id;
89};
90
91#define TPM_VPRIV(c) (c)->vendor.priv
92
93#define TPM_VID_INTEL 0x8086
94#define TPM_VID_WINBOND 0x1050
95#define TPM_VID_STM 0x104A
96
97struct tpm_chip {
98 struct device *dev; /* Device stuff */
99 const struct tpm_class_ops *ops;
100
101 int dev_num; /* /dev/tpm# */
102 char devname[7];
103 unsigned long is_open; /* only one allowed */
104 int time_expired;
105
106 struct mutex tpm_mutex; /* tpm is processing */
107
108 struct tpm_vendor_specific vendor;
109
110 struct dentry **bios_dir;
111
112 struct list_head list;
113 void (*release) (struct device *);
114};
115
116#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
117
118static inline void tpm_chip_put(struct tpm_chip *chip)
119{
120 module_put(chip->dev->driver->owner);
121}
122
123static inline int tpm_read_index(int base, int index)
124{
125 outb(index, base);
126 return inb(base+1) & 0xFF;
127}
128
129static inline void tpm_write_index(int base, int index, int value)
130{
131 outb(index, base);
132 outb(value & 0xFF, base+1);
133}
134struct tpm_input_header {
135 __be16 tag;
136 __be32 length;
137 __be32 ordinal;
138} __packed;
139
140struct tpm_output_header {
141 __be16 tag;
142 __be32 length;
143 __be32 return_code;
144} __packed;
145
146#define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
147
148struct stclear_flags_t {
149 __be16 tag;
150 u8 deactivated;
151 u8 disableForceClear;
152 u8 physicalPresence;
153 u8 physicalPresenceLock;
154 u8 bGlobalLock;
155} __packed;
156
157struct tpm_version_t {
158 u8 Major;
159 u8 Minor;
160 u8 revMajor;
161 u8 revMinor;
162} __packed;
163
164struct tpm_version_1_2_t {
165 __be16 tag;
166 u8 Major;
167 u8 Minor;
168 u8 revMajor;
169 u8 revMinor;
170} __packed;
171
172struct timeout_t {
173 __be32 a;
174 __be32 b;
175 __be32 c;
176 __be32 d;
177} __packed;
178
179struct duration_t {
180 __be32 tpm_short;
181 __be32 tpm_medium;
182 __be32 tpm_long;
183} __packed;
184
185struct permanent_flags_t {
186 __be16 tag;
187 u8 disable;
188 u8 ownership;
189 u8 deactivated;
190 u8 readPubek;
191 u8 disableOwnerClear;
192 u8 allowMaintenance;
193 u8 physicalPresenceLifetimeLock;
194 u8 physicalPresenceHWEnable;
195 u8 physicalPresenceCMDEnable;
196 u8 CEKPUsed;
197 u8 TPMpost;
198 u8 TPMpostLock;
199 u8 FIPS;
200 u8 operator;
201 u8 enableRevokeEK;
202 u8 nvLocked;
203 u8 readSRKPub;
204 u8 tpmEstablished;
205 u8 maintenanceDone;
206 u8 disableFullDALogicInfo;
207} __packed;
208
209typedef union {
210 struct permanent_flags_t perm_flags;
211 struct stclear_flags_t stclear_flags;
212 bool owned;
213 __be32 num_pcrs;
214 struct tpm_version_t tpm_version;
215 struct tpm_version_1_2_t tpm_version_1_2;
216 __be32 manufacturer_id;
217 struct timeout_t timeout;
218 struct duration_t duration;
219} cap_t;
220
221enum tpm_capabilities {
222 TPM_CAP_FLAG = cpu_to_be32(4),
223 TPM_CAP_PROP = cpu_to_be32(5),
224 CAP_VERSION_1_1 = cpu_to_be32(0x06),
225 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
226};
227
228enum tpm_sub_capabilities {
229 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
230 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
231 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
232 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
233 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
234 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
235 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
236
237};
238
239struct tpm_getcap_params_in {
240 __be32 cap;
241 __be32 subcap_size;
242 __be32 subcap;
243} __packed;
244
245struct tpm_getcap_params_out {
246 __be32 cap_size;
247 cap_t cap;
248} __packed;
249
250struct tpm_readpubek_params_out {
251 u8 algorithm[4];
252 u8 encscheme[2];
253 u8 sigscheme[2];
254 __be32 paramsize;
255 u8 parameters[12]; /*assuming RSA*/
256 __be32 keysize;
257 u8 modulus[256];
258 u8 checksum[20];
259} __packed;
260
261typedef union {
262 struct tpm_input_header in;
263 struct tpm_output_header out;
264} tpm_cmd_header;
265
266struct tpm_pcrread_out {
267 u8 pcr_result[TPM_DIGEST_SIZE];
268} __packed;
269
270struct tpm_pcrread_in {
271 __be32 pcr_idx;
272} __packed;
273
274struct tpm_pcrextend_in {
275 __be32 pcr_idx;
276 u8 hash[TPM_DIGEST_SIZE];
277} __packed;
278
279/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
280 * bytes, but 128 is still a relatively large number of random bytes and
281 * anything much bigger causes users of struct tpm_cmd_t to start getting
282 * compiler warnings about stack frame size. */
283#define TPM_MAX_RNG_DATA 128
284
285struct tpm_getrandom_out {
286 __be32 rng_data_len;
287 u8 rng_data[TPM_MAX_RNG_DATA];
288} __packed;
289
290struct tpm_getrandom_in {
291 __be32 num_bytes;
292} __packed;
293
294struct tpm_startup_in {
295 __be16 startup_type;
296} __packed;
297
298typedef union {
299 struct tpm_getcap_params_out getcap_out;
300 struct tpm_readpubek_params_out readpubek_out;
301 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
302 struct tpm_getcap_params_in getcap_in;
303 struct tpm_pcrread_in pcrread_in;
304 struct tpm_pcrread_out pcrread_out;
305 struct tpm_pcrextend_in pcrextend_in;
306 struct tpm_getrandom_in getrandom_in;
307 struct tpm_getrandom_out getrandom_out;
308 struct tpm_startup_in startup_in;
309} tpm_cmd_params;
310
311struct tpm_cmd_t {
312 tpm_cmd_header header;
313 tpm_cmd_params params;
314} __packed;
315
316ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
317
318ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
319 size_t bufsiz);
320extern int tpm_get_timeouts(struct tpm_chip *);
321extern void tpm_gen_interrupt(struct tpm_chip *);
322extern int tpm_do_selftest(struct tpm_chip *);
323extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
324extern struct tpm_chip* tpm_register_hardware(struct device *,
325 const struct tpm_class_ops *ops);
326extern void tpm_dev_vendor_release(struct tpm_chip *);
327extern void tpm_remove_hardware(struct device *);
328extern int tpm_pm_suspend(struct device *);
329extern int tpm_pm_resume(struct device *);
330extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
331 wait_queue_head_t *, bool);
332
333int tpm_dev_add_device(struct tpm_chip *chip);
334void tpm_dev_del_device(struct tpm_chip *chip);
335int tpm_sysfs_add_device(struct tpm_chip *chip);
336void tpm_sysfs_del_device(struct tpm_chip *chip);
337
338int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
339
340#ifdef CONFIG_ACPI
341extern int tpm_add_ppi(struct kobject *);
342extern void tpm_remove_ppi(struct kobject *);
343#else
344static inline int tpm_add_ppi(struct kobject *parent)
345{
346 return 0;
347}
348
349static inline void tpm_remove_ppi(struct kobject *parent)
350{
351}
352#endif