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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);
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/highmem.h>
29#include <linux/tpm_eventlog.h>
30
31#ifdef CONFIG_X86
32#include <asm/intel-family.h>
33#endif
34
35#define TPM_MINOR 224 /* officially assigned */
36#define TPM_BUFSIZE 4096
37#define TPM_NUM_DEVICES 65536
38#define TPM_RETRY 50
39
40enum tpm_timeout {
41 TPM_TIMEOUT = 5, /* msecs */
42 TPM_TIMEOUT_RETRY = 100, /* msecs */
43 TPM_TIMEOUT_RANGE_US = 300, /* usecs */
44 TPM_TIMEOUT_POLL = 1, /* msecs */
45 TPM_TIMEOUT_USECS_MIN = 100, /* usecs */
46 TPM_TIMEOUT_USECS_MAX = 500 /* usecs */
47};
48
49/* TPM addresses */
50enum tpm_addr {
51 TPM_SUPERIO_ADDR = 0x2E,
52 TPM_ADDR = 0x4E,
53};
54
55#define TPM_WARN_RETRY 0x800
56#define TPM_WARN_DOING_SELFTEST 0x802
57#define TPM_ERR_DEACTIVATED 0x6
58#define TPM_ERR_DISABLED 0x7
59#define TPM_ERR_INVALID_POSTINIT 38
60
61#define TPM_HEADER_SIZE 10
62
63enum tpm2_const {
64 TPM2_PLATFORM_PCR = 24,
65 TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
66};
67
68enum tpm2_timeouts {
69 TPM2_TIMEOUT_A = 750,
70 TPM2_TIMEOUT_B = 2000,
71 TPM2_TIMEOUT_C = 200,
72 TPM2_TIMEOUT_D = 30,
73 TPM2_DURATION_SHORT = 20,
74 TPM2_DURATION_MEDIUM = 750,
75 TPM2_DURATION_LONG = 2000,
76 TPM2_DURATION_LONG_LONG = 300000,
77 TPM2_DURATION_DEFAULT = 120000,
78};
79
80enum tpm2_structures {
81 TPM2_ST_NO_SESSIONS = 0x8001,
82 TPM2_ST_SESSIONS = 0x8002,
83};
84
85/* Indicates from what layer of the software stack the error comes from */
86#define TSS2_RC_LAYER_SHIFT 16
87#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
88
89enum tpm2_return_codes {
90 TPM2_RC_SUCCESS = 0x0000,
91 TPM2_RC_HASH = 0x0083, /* RC_FMT1 */
92 TPM2_RC_HANDLE = 0x008B,
93 TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
94 TPM2_RC_FAILURE = 0x0101,
95 TPM2_RC_DISABLED = 0x0120,
96 TPM2_RC_COMMAND_CODE = 0x0143,
97 TPM2_RC_TESTING = 0x090A, /* RC_WARN */
98 TPM2_RC_REFERENCE_H0 = 0x0910,
99 TPM2_RC_RETRY = 0x0922,
100};
101
102enum tpm2_command_codes {
103 TPM2_CC_FIRST = 0x011F,
104 TPM2_CC_HIERARCHY_CONTROL = 0x0121,
105 TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
106 TPM2_CC_CREATE_PRIMARY = 0x0131,
107 TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
108 TPM2_CC_SELF_TEST = 0x0143,
109 TPM2_CC_STARTUP = 0x0144,
110 TPM2_CC_SHUTDOWN = 0x0145,
111 TPM2_CC_NV_READ = 0x014E,
112 TPM2_CC_CREATE = 0x0153,
113 TPM2_CC_LOAD = 0x0157,
114 TPM2_CC_SEQUENCE_UPDATE = 0x015C,
115 TPM2_CC_UNSEAL = 0x015E,
116 TPM2_CC_CONTEXT_LOAD = 0x0161,
117 TPM2_CC_CONTEXT_SAVE = 0x0162,
118 TPM2_CC_FLUSH_CONTEXT = 0x0165,
119 TPM2_CC_VERIFY_SIGNATURE = 0x0177,
120 TPM2_CC_GET_CAPABILITY = 0x017A,
121 TPM2_CC_GET_RANDOM = 0x017B,
122 TPM2_CC_PCR_READ = 0x017E,
123 TPM2_CC_PCR_EXTEND = 0x0182,
124 TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
125 TPM2_CC_HASH_SEQUENCE_START = 0x0186,
126 TPM2_CC_CREATE_LOADED = 0x0191,
127 TPM2_CC_LAST = 0x0193, /* Spec 1.36 */
128};
129
130enum tpm2_permanent_handles {
131 TPM2_RS_PW = 0x40000009,
132};
133
134enum tpm2_capabilities {
135 TPM2_CAP_HANDLES = 1,
136 TPM2_CAP_COMMANDS = 2,
137 TPM2_CAP_PCRS = 5,
138 TPM2_CAP_TPM_PROPERTIES = 6,
139};
140
141enum tpm2_properties {
142 TPM_PT_TOTAL_COMMANDS = 0x0129,
143};
144
145enum tpm2_startup_types {
146 TPM2_SU_CLEAR = 0x0000,
147 TPM2_SU_STATE = 0x0001,
148};
149
150enum tpm2_cc_attrs {
151 TPM2_CC_ATTR_CHANDLES = 25,
152 TPM2_CC_ATTR_RHANDLE = 28,
153};
154
155#define TPM_VID_INTEL 0x8086
156#define TPM_VID_WINBOND 0x1050
157#define TPM_VID_STM 0x104A
158
159enum tpm_chip_flags {
160 TPM_CHIP_FLAG_TPM2 = BIT(1),
161 TPM_CHIP_FLAG_IRQ = BIT(2),
162 TPM_CHIP_FLAG_VIRTUAL = BIT(3),
163 TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
164 TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
165};
166
167#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
168
169struct tpm_header {
170 __be16 tag;
171 __be32 length;
172 union {
173 __be32 ordinal;
174 __be32 return_code;
175 };
176} __packed;
177
178#define TPM_TAG_RQU_COMMAND 193
179
180struct stclear_flags_t {
181 __be16 tag;
182 u8 deactivated;
183 u8 disableForceClear;
184 u8 physicalPresence;
185 u8 physicalPresenceLock;
186 u8 bGlobalLock;
187} __packed;
188
189struct tpm_version_t {
190 u8 Major;
191 u8 Minor;
192 u8 revMajor;
193 u8 revMinor;
194} __packed;
195
196struct tpm_version_1_2_t {
197 __be16 tag;
198 u8 Major;
199 u8 Minor;
200 u8 revMajor;
201 u8 revMinor;
202} __packed;
203
204struct timeout_t {
205 __be32 a;
206 __be32 b;
207 __be32 c;
208 __be32 d;
209} __packed;
210
211struct duration_t {
212 __be32 tpm_short;
213 __be32 tpm_medium;
214 __be32 tpm_long;
215} __packed;
216
217struct permanent_flags_t {
218 __be16 tag;
219 u8 disable;
220 u8 ownership;
221 u8 deactivated;
222 u8 readPubek;
223 u8 disableOwnerClear;
224 u8 allowMaintenance;
225 u8 physicalPresenceLifetimeLock;
226 u8 physicalPresenceHWEnable;
227 u8 physicalPresenceCMDEnable;
228 u8 CEKPUsed;
229 u8 TPMpost;
230 u8 TPMpostLock;
231 u8 FIPS;
232 u8 operator;
233 u8 enableRevokeEK;
234 u8 nvLocked;
235 u8 readSRKPub;
236 u8 tpmEstablished;
237 u8 maintenanceDone;
238 u8 disableFullDALogicInfo;
239} __packed;
240
241typedef union {
242 struct permanent_flags_t perm_flags;
243 struct stclear_flags_t stclear_flags;
244 __u8 owned;
245 __be32 num_pcrs;
246 struct tpm_version_t tpm_version;
247 struct tpm_version_1_2_t tpm_version_1_2;
248 __be32 manufacturer_id;
249 struct timeout_t timeout;
250 struct duration_t duration;
251} cap_t;
252
253enum tpm_capabilities {
254 TPM_CAP_FLAG = 4,
255 TPM_CAP_PROP = 5,
256 TPM_CAP_VERSION_1_1 = 0x06,
257 TPM_CAP_VERSION_1_2 = 0x1A,
258};
259
260enum tpm_sub_capabilities {
261 TPM_CAP_PROP_PCR = 0x101,
262 TPM_CAP_PROP_MANUFACTURER = 0x103,
263 TPM_CAP_FLAG_PERM = 0x108,
264 TPM_CAP_FLAG_VOL = 0x109,
265 TPM_CAP_PROP_OWNER = 0x111,
266 TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
267 TPM_CAP_PROP_TIS_DURATION = 0x120,
268};
269
270
271/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
272 * bytes, but 128 is still a relatively large number of random bytes and
273 * anything much bigger causes users of struct tpm_cmd_t to start getting
274 * compiler warnings about stack frame size. */
275#define TPM_MAX_RNG_DATA 128
276
277/* A string buffer type for constructing TPM commands. This is based on the
278 * ideas of string buffer code in security/keys/trusted.h but is heap based
279 * in order to keep the stack usage minimal.
280 */
281
282enum tpm_buf_flags {
283 TPM_BUF_OVERFLOW = BIT(0),
284};
285
286struct tpm_buf {
287 struct page *data_page;
288 unsigned int flags;
289 u8 *data;
290};
291
292static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
293{
294 struct tpm_header *head = (struct tpm_header *)buf->data;
295
296 head->tag = cpu_to_be16(tag);
297 head->length = cpu_to_be32(sizeof(*head));
298 head->ordinal = cpu_to_be32(ordinal);
299}
300
301static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
302{
303 buf->data_page = alloc_page(GFP_HIGHUSER);
304 if (!buf->data_page)
305 return -ENOMEM;
306
307 buf->flags = 0;
308 buf->data = kmap(buf->data_page);
309 tpm_buf_reset(buf, tag, ordinal);
310 return 0;
311}
312
313static inline void tpm_buf_destroy(struct tpm_buf *buf)
314{
315 kunmap(buf->data_page);
316 __free_page(buf->data_page);
317}
318
319static inline u32 tpm_buf_length(struct tpm_buf *buf)
320{
321 struct tpm_header *head = (struct tpm_header *)buf->data;
322
323 return be32_to_cpu(head->length);
324}
325
326static inline u16 tpm_buf_tag(struct tpm_buf *buf)
327{
328 struct tpm_header *head = (struct tpm_header *)buf->data;
329
330 return be16_to_cpu(head->tag);
331}
332
333static inline void tpm_buf_append(struct tpm_buf *buf,
334 const unsigned char *new_data,
335 unsigned int new_len)
336{
337 struct tpm_header *head = (struct tpm_header *)buf->data;
338 u32 len = tpm_buf_length(buf);
339
340 /* Return silently if overflow has already happened. */
341 if (buf->flags & TPM_BUF_OVERFLOW)
342 return;
343
344 if ((len + new_len) > PAGE_SIZE) {
345 WARN(1, "tpm_buf: overflow\n");
346 buf->flags |= TPM_BUF_OVERFLOW;
347 return;
348 }
349
350 memcpy(&buf->data[len], new_data, new_len);
351 head->length = cpu_to_be32(len + new_len);
352}
353
354static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
355{
356 tpm_buf_append(buf, &value, 1);
357}
358
359static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
360{
361 __be16 value2 = cpu_to_be16(value);
362
363 tpm_buf_append(buf, (u8 *) &value2, 2);
364}
365
366static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
367{
368 __be32 value2 = cpu_to_be32(value);
369
370 tpm_buf_append(buf, (u8 *) &value2, 4);
371}
372
373extern struct class *tpm_class;
374extern struct class *tpmrm_class;
375extern dev_t tpm_devt;
376extern const struct file_operations tpm_fops;
377extern const struct file_operations tpmrm_fops;
378extern struct idr dev_nums_idr;
379
380ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz);
381ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,
382 size_t min_rsp_body_length, const char *desc);
383int tpm_get_timeouts(struct tpm_chip *);
384int tpm_auto_startup(struct tpm_chip *chip);
385
386int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr);
387int tpm1_auto_startup(struct tpm_chip *chip);
388int tpm1_do_selftest(struct tpm_chip *chip);
389int tpm1_get_timeouts(struct tpm_chip *chip);
390unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
391int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash,
392 const char *log_msg);
393int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
394ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
395 const char *desc, size_t min_cap_length);
396int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
397int tpm1_get_pcr_allocation(struct tpm_chip *chip);
398unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
399int tpm_pm_suspend(struct device *dev);
400int tpm_pm_resume(struct device *dev);
401
402static inline void tpm_msleep(unsigned int delay_msec)
403{
404 usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
405 delay_msec * 1000);
406};
407
408int tpm_chip_start(struct tpm_chip *chip);
409void tpm_chip_stop(struct tpm_chip *chip);
410struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
411__must_check int tpm_try_get_ops(struct tpm_chip *chip);
412void tpm_put_ops(struct tpm_chip *chip);
413
414struct tpm_chip *tpm_chip_alloc(struct device *dev,
415 const struct tpm_class_ops *ops);
416struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
417 const struct tpm_class_ops *ops);
418int tpm_chip_register(struct tpm_chip *chip);
419void tpm_chip_unregister(struct tpm_chip *chip);
420
421void tpm_sysfs_add_device(struct tpm_chip *chip);
422
423
424#ifdef CONFIG_ACPI
425extern void tpm_add_ppi(struct tpm_chip *chip);
426#else
427static inline void tpm_add_ppi(struct tpm_chip *chip)
428{
429}
430#endif
431
432static inline u32 tpm2_rc_value(u32 rc)
433{
434 return (rc & BIT(7)) ? rc & 0xff : rc;
435}
436
437int tpm2_get_timeouts(struct tpm_chip *chip);
438int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
439 struct tpm_digest *digest, u16 *digest_size_ptr);
440int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
441 struct tpm_digest *digests);
442int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
443void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
444int tpm2_seal_trusted(struct tpm_chip *chip,
445 struct trusted_key_payload *payload,
446 struct trusted_key_options *options);
447int tpm2_unseal_trusted(struct tpm_chip *chip,
448 struct trusted_key_payload *payload,
449 struct trusted_key_options *options);
450ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
451 u32 *value, const char *desc);
452
453ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip);
454int tpm2_auto_startup(struct tpm_chip *chip);
455void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
456unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
457int tpm2_probe(struct tpm_chip *chip);
458int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
459int tpm2_init_space(struct tpm_space *space);
460void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
461void tpm2_flush_space(struct tpm_chip *chip);
462int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
463 size_t cmdsiz);
464int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf,
465 size_t *bufsiz);
466
467int tpm_bios_log_setup(struct tpm_chip *chip);
468void tpm_bios_log_teardown(struct tpm_chip *chip);
469int tpm_dev_common_init(void);
470void tpm_dev_common_exit(void);
471#endif