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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2004 IBM Corporation
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 * Copyright (C) 2013 Obsidian Research Corp
11 * Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
12 *
13 * sysfs filesystem inspection interface to the TPM
14 */
15#include <linux/device.h>
16#include "tpm.h"
17
18struct tpm_readpubek_out {
19 u8 algorithm[4];
20 u8 encscheme[2];
21 u8 sigscheme[2];
22 __be32 paramsize;
23 u8 parameters[12];
24 __be32 keysize;
25 u8 modulus[256];
26 u8 checksum[20];
27} __packed;
28
29#define READ_PUBEK_RESULT_MIN_BODY_SIZE (28 + 256)
30#define TPM_ORD_READPUBEK 124
31
32static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
33 char *buf)
34{
35 struct tpm_buf tpm_buf;
36 struct tpm_readpubek_out *out;
37 int i;
38 char *str = buf;
39 struct tpm_chip *chip = to_tpm_chip(dev);
40 char anti_replay[20];
41
42 memset(&anti_replay, 0, sizeof(anti_replay));
43
44 if (tpm_try_get_ops(chip))
45 return 0;
46
47 if (tpm_buf_init(&tpm_buf, TPM_TAG_RQU_COMMAND, TPM_ORD_READPUBEK))
48 goto out_ops;
49
50 tpm_buf_append(&tpm_buf, anti_replay, sizeof(anti_replay));
51
52 if (tpm_transmit_cmd(chip, &tpm_buf, READ_PUBEK_RESULT_MIN_BODY_SIZE,
53 "attempting to read the PUBEK"))
54 goto out_buf;
55
56 out = (struct tpm_readpubek_out *)&tpm_buf.data[10];
57 str +=
58 sprintf(str,
59 "Algorithm: %4ph\n"
60 "Encscheme: %2ph\n"
61 "Sigscheme: %2ph\n"
62 "Parameters: %12ph\n"
63 "Modulus length: %d\n"
64 "Modulus:\n",
65 out->algorithm,
66 out->encscheme,
67 out->sigscheme,
68 out->parameters,
69 be32_to_cpu(out->keysize));
70
71 for (i = 0; i < 256; i += 16)
72 str += sprintf(str, "%16ph\n", &out->modulus[i]);
73
74out_buf:
75 tpm_buf_destroy(&tpm_buf);
76out_ops:
77 tpm_put_ops(chip);
78 return str - buf;
79}
80static DEVICE_ATTR_RO(pubek);
81
82static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
83 char *buf)
84{
85 cap_t cap;
86 u8 digest[TPM_DIGEST_SIZE];
87 u32 i, j, num_pcrs;
88 char *str = buf;
89 struct tpm_chip *chip = to_tpm_chip(dev);
90
91 if (tpm_try_get_ops(chip))
92 return 0;
93
94 if (tpm1_getcap(chip, TPM_CAP_PROP_PCR, &cap,
95 "attempting to determine the number of PCRS",
96 sizeof(cap.num_pcrs))) {
97 tpm_put_ops(chip);
98 return 0;
99 }
100
101 num_pcrs = be32_to_cpu(cap.num_pcrs);
102 for (i = 0; i < num_pcrs; i++) {
103 if (tpm1_pcr_read(chip, i, digest)) {
104 str = buf;
105 break;
106 }
107 str += sprintf(str, "PCR-%02d: ", i);
108 for (j = 0; j < TPM_DIGEST_SIZE; j++)
109 str += sprintf(str, "%02X ", digest[j]);
110 str += sprintf(str, "\n");
111 }
112 tpm_put_ops(chip);
113 return str - buf;
114}
115static DEVICE_ATTR_RO(pcrs);
116
117static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
118 char *buf)
119{
120 struct tpm_chip *chip = to_tpm_chip(dev);
121 ssize_t rc = 0;
122 cap_t cap;
123
124 if (tpm_try_get_ops(chip))
125 return 0;
126
127 if (tpm1_getcap(chip, TPM_CAP_FLAG_PERM, &cap,
128 "attempting to determine the permanent enabled state",
129 sizeof(cap.perm_flags)))
130 goto out_ops;
131
132 rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
133out_ops:
134 tpm_put_ops(chip);
135 return rc;
136}
137static DEVICE_ATTR_RO(enabled);
138
139static ssize_t active_show(struct device *dev, struct device_attribute *attr,
140 char *buf)
141{
142 struct tpm_chip *chip = to_tpm_chip(dev);
143 ssize_t rc = 0;
144 cap_t cap;
145
146 if (tpm_try_get_ops(chip))
147 return 0;
148
149 if (tpm1_getcap(chip, TPM_CAP_FLAG_PERM, &cap,
150 "attempting to determine the permanent active state",
151 sizeof(cap.perm_flags)))
152 goto out_ops;
153
154 rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
155out_ops:
156 tpm_put_ops(chip);
157 return rc;
158}
159static DEVICE_ATTR_RO(active);
160
161static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
162 char *buf)
163{
164 struct tpm_chip *chip = to_tpm_chip(dev);
165 ssize_t rc = 0;
166 cap_t cap;
167
168 if (tpm_try_get_ops(chip))
169 return 0;
170
171 if (tpm1_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
172 "attempting to determine the owner state",
173 sizeof(cap.owned)))
174 goto out_ops;
175
176 rc = sprintf(buf, "%d\n", cap.owned);
177out_ops:
178 tpm_put_ops(chip);
179 return rc;
180}
181static DEVICE_ATTR_RO(owned);
182
183static ssize_t temp_deactivated_show(struct device *dev,
184 struct device_attribute *attr, char *buf)
185{
186 struct tpm_chip *chip = to_tpm_chip(dev);
187 ssize_t rc = 0;
188 cap_t cap;
189
190 if (tpm_try_get_ops(chip))
191 return 0;
192
193 if (tpm1_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
194 "attempting to determine the temporary state",
195 sizeof(cap.stclear_flags)))
196 goto out_ops;
197
198 rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
199out_ops:
200 tpm_put_ops(chip);
201 return rc;
202}
203static DEVICE_ATTR_RO(temp_deactivated);
204
205static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
206 char *buf)
207{
208 struct tpm_chip *chip = to_tpm_chip(dev);
209 struct tpm1_version *version;
210 ssize_t rc = 0;
211 char *str = buf;
212 cap_t cap;
213
214 if (tpm_try_get_ops(chip))
215 return 0;
216
217 if (tpm1_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
218 "attempting to determine the manufacturer",
219 sizeof(cap.manufacturer_id)))
220 goto out_ops;
221
222 str += sprintf(str, "Manufacturer: 0x%x\n",
223 be32_to_cpu(cap.manufacturer_id));
224
225 /* TPM 1.2 */
226 if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap,
227 "attempting to determine the 1.2 version",
228 sizeof(cap.version2))) {
229 version = &cap.version2.version;
230 goto out_print;
231 }
232
233 /* TPM 1.1 */
234 if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap,
235 "attempting to determine the 1.1 version",
236 sizeof(cap.version1))) {
237 goto out_ops;
238 }
239
240 version = &cap.version1;
241
242out_print:
243 str += sprintf(str,
244 "TCG version: %d.%d\nFirmware version: %d.%d\n",
245 version->major, version->minor,
246 version->rev_major, version->rev_minor);
247
248 rc = str - buf;
249
250out_ops:
251 tpm_put_ops(chip);
252 return rc;
253}
254static DEVICE_ATTR_RO(caps);
255
256static ssize_t cancel_store(struct device *dev, struct device_attribute *attr,
257 const char *buf, size_t count)
258{
259 struct tpm_chip *chip = to_tpm_chip(dev);
260
261 if (tpm_try_get_ops(chip))
262 return 0;
263
264 chip->ops->cancel(chip);
265 tpm_put_ops(chip);
266 return count;
267}
268static DEVICE_ATTR_WO(cancel);
269
270static ssize_t durations_show(struct device *dev, struct device_attribute *attr,
271 char *buf)
272{
273 struct tpm_chip *chip = to_tpm_chip(dev);
274
275 if (chip->duration[TPM_LONG] == 0)
276 return 0;
277
278 return sprintf(buf, "%d %d %d [%s]\n",
279 jiffies_to_usecs(chip->duration[TPM_SHORT]),
280 jiffies_to_usecs(chip->duration[TPM_MEDIUM]),
281 jiffies_to_usecs(chip->duration[TPM_LONG]),
282 chip->duration_adjusted
283 ? "adjusted" : "original");
284}
285static DEVICE_ATTR_RO(durations);
286
287static ssize_t timeouts_show(struct device *dev, struct device_attribute *attr,
288 char *buf)
289{
290 struct tpm_chip *chip = to_tpm_chip(dev);
291
292 return sprintf(buf, "%d %d %d %d [%s]\n",
293 jiffies_to_usecs(chip->timeout_a),
294 jiffies_to_usecs(chip->timeout_b),
295 jiffies_to_usecs(chip->timeout_c),
296 jiffies_to_usecs(chip->timeout_d),
297 chip->timeout_adjusted
298 ? "adjusted" : "original");
299}
300static DEVICE_ATTR_RO(timeouts);
301
302static ssize_t tpm_version_major_show(struct device *dev,
303 struct device_attribute *attr, char *buf)
304{
305 struct tpm_chip *chip = to_tpm_chip(dev);
306
307 return sprintf(buf, "%s\n", chip->flags & TPM_CHIP_FLAG_TPM2
308 ? "2" : "1");
309}
310static DEVICE_ATTR_RO(tpm_version_major);
311
312static struct attribute *tpm1_dev_attrs[] = {
313 &dev_attr_pubek.attr,
314 &dev_attr_pcrs.attr,
315 &dev_attr_enabled.attr,
316 &dev_attr_active.attr,
317 &dev_attr_owned.attr,
318 &dev_attr_temp_deactivated.attr,
319 &dev_attr_caps.attr,
320 &dev_attr_cancel.attr,
321 &dev_attr_durations.attr,
322 &dev_attr_timeouts.attr,
323 &dev_attr_tpm_version_major.attr,
324 NULL,
325};
326
327static struct attribute *tpm2_dev_attrs[] = {
328 &dev_attr_tpm_version_major.attr,
329 NULL
330};
331
332static const struct attribute_group tpm1_dev_group = {
333 .attrs = tpm1_dev_attrs,
334};
335
336static const struct attribute_group tpm2_dev_group = {
337 .attrs = tpm2_dev_attrs,
338};
339
340struct tpm_pcr_attr {
341 int alg_id;
342 int pcr;
343 struct device_attribute attr;
344};
345
346#define to_tpm_pcr_attr(a) container_of(a, struct tpm_pcr_attr, attr)
347
348static ssize_t pcr_value_show(struct device *dev,
349 struct device_attribute *attr,
350 char *buf)
351{
352 struct tpm_pcr_attr *ha = to_tpm_pcr_attr(attr);
353 struct tpm_chip *chip = to_tpm_chip(dev);
354 struct tpm_digest digest;
355 int i;
356 int digest_size = 0;
357 int rc;
358 char *str = buf;
359
360 for (i = 0; i < chip->nr_allocated_banks; i++)
361 if (ha->alg_id == chip->allocated_banks[i].alg_id)
362 digest_size = chip->allocated_banks[i].digest_size;
363 /* should never happen */
364 if (!digest_size)
365 return -EINVAL;
366
367 digest.alg_id = ha->alg_id;
368 rc = tpm_pcr_read(chip, ha->pcr, &digest);
369 if (rc)
370 return rc;
371 for (i = 0; i < digest_size; i++)
372 str += sprintf(str, "%02X", digest.digest[i]);
373 str += sprintf(str, "\n");
374
375 return str - buf;
376}
377
378/*
379 * The following set of defines represents all the magic to build
380 * the per hash attribute groups for displaying each bank of PCRs.
381 * The only slight problem with this approach is that every PCR is
382 * hard coded to be present, so you don't know if an PCR is missing
383 * until a cat of the file returns -EINVAL
384 *
385 * Also note you must ignore checkpatch warnings in this macro
386 * code. This is deep macro magic that checkpatch.pl doesn't
387 * understand.
388 */
389
390/* Note, this must match TPM2_PLATFORM_PCR which is fixed at 24. */
391#define _TPM_HELPER(_alg, _hash, F) \
392 F(_alg, _hash, 0) \
393 F(_alg, _hash, 1) \
394 F(_alg, _hash, 2) \
395 F(_alg, _hash, 3) \
396 F(_alg, _hash, 4) \
397 F(_alg, _hash, 5) \
398 F(_alg, _hash, 6) \
399 F(_alg, _hash, 7) \
400 F(_alg, _hash, 8) \
401 F(_alg, _hash, 9) \
402 F(_alg, _hash, 10) \
403 F(_alg, _hash, 11) \
404 F(_alg, _hash, 12) \
405 F(_alg, _hash, 13) \
406 F(_alg, _hash, 14) \
407 F(_alg, _hash, 15) \
408 F(_alg, _hash, 16) \
409 F(_alg, _hash, 17) \
410 F(_alg, _hash, 18) \
411 F(_alg, _hash, 19) \
412 F(_alg, _hash, 20) \
413 F(_alg, _hash, 21) \
414 F(_alg, _hash, 22) \
415 F(_alg, _hash, 23)
416
417/* ignore checkpatch warning about trailing ; in macro. */
418#define PCR_ATTR(_alg, _hash, _pcr) \
419 static struct tpm_pcr_attr dev_attr_pcr_##_hash##_##_pcr = { \
420 .alg_id = _alg, \
421 .pcr = _pcr, \
422 .attr = { \
423 .attr = { \
424 .name = __stringify(_pcr), \
425 .mode = 0444 \
426 }, \
427 .show = pcr_value_show \
428 } \
429 };
430
431#define PCR_ATTRS(_alg, _hash) \
432 _TPM_HELPER(_alg, _hash, PCR_ATTR)
433
434/* ignore checkpatch warning about trailing , in macro. */
435#define PCR_ATTR_VAL(_alg, _hash, _pcr) \
436 &dev_attr_pcr_##_hash##_##_pcr.attr.attr,
437
438#define PCR_ATTR_GROUP_ARRAY(_alg, _hash) \
439 static struct attribute *pcr_group_attrs_##_hash[] = { \
440 _TPM_HELPER(_alg, _hash, PCR_ATTR_VAL) \
441 NULL \
442 }
443
444#define PCR_ATTR_GROUP(_alg, _hash) \
445 static struct attribute_group pcr_group_##_hash = { \
446 .name = "pcr-" __stringify(_hash), \
447 .attrs = pcr_group_attrs_##_hash \
448 }
449
450#define PCR_ATTR_BUILD(_alg, _hash) \
451 PCR_ATTRS(_alg, _hash) \
452 PCR_ATTR_GROUP_ARRAY(_alg, _hash); \
453 PCR_ATTR_GROUP(_alg, _hash)
454/*
455 * End of macro structure to build an attribute group containing 24
456 * PCR value files for each supported hash algorithm
457 */
458
459/*
460 * The next set of macros implements the cleverness for each hash to
461 * build a static attribute group called pcr_group_<hash> which can be
462 * added to chip->groups[].
463 *
464 * The first argument is the TPM algorithm id and the second is the
465 * hash used as both the suffix and the group name. Note: the group
466 * name is a directory in the top level tpm class with the name
467 * pcr-<hash>, so it must not clash with any other names already
468 * in the sysfs directory.
469 */
470PCR_ATTR_BUILD(TPM_ALG_SHA1, sha1);
471PCR_ATTR_BUILD(TPM_ALG_SHA256, sha256);
472PCR_ATTR_BUILD(TPM_ALG_SHA384, sha384);
473PCR_ATTR_BUILD(TPM_ALG_SHA512, sha512);
474PCR_ATTR_BUILD(TPM_ALG_SM3_256, sm3);
475
476
477void tpm_sysfs_add_device(struct tpm_chip *chip)
478{
479 int i;
480
481 WARN_ON(chip->groups_cnt != 0);
482
483 if (tpm_is_firmware_upgrade(chip))
484 return;
485
486 if (chip->flags & TPM_CHIP_FLAG_TPM2)
487 chip->groups[chip->groups_cnt++] = &tpm2_dev_group;
488 else
489 chip->groups[chip->groups_cnt++] = &tpm1_dev_group;
490
491 /* add one group for each bank hash */
492 for (i = 0; i < chip->nr_allocated_banks; i++) {
493 switch (chip->allocated_banks[i].alg_id) {
494 case TPM_ALG_SHA1:
495 chip->groups[chip->groups_cnt++] = &pcr_group_sha1;
496 break;
497 case TPM_ALG_SHA256:
498 chip->groups[chip->groups_cnt++] = &pcr_group_sha256;
499 break;
500 case TPM_ALG_SHA384:
501 chip->groups[chip->groups_cnt++] = &pcr_group_sha384;
502 break;
503 case TPM_ALG_SHA512:
504 chip->groups[chip->groups_cnt++] = &pcr_group_sha512;
505 break;
506 case TPM_ALG_SM3_256:
507 chip->groups[chip->groups_cnt++] = &pcr_group_sm3;
508 break;
509 default:
510 /*
511 * If triggers, send a patch to add both a
512 * PCR_ATTR_BUILD() macro above for the
513 * missing algorithm as well as an additional
514 * case in this switch statement.
515 */
516 dev_err(&chip->dev,
517 "TPM with unsupported bank algorithm 0x%04x",
518 chip->allocated_banks[i].alg_id);
519 break;
520 }
521 }
522
523 /*
524 * This will only trigger if someone has added an additional
525 * hash to the tpm_algorithms enum without incrementing
526 * TPM_MAX_HASHES.
527 */
528 WARN_ON(chip->groups_cnt > TPM_MAX_HASHES + 1);
529}
1/*
2 * Copyright (C) 2004 IBM Corporation
3 * Authors:
4 * Leendert van Doorn <leendert@watson.ibm.com>
5 * Dave Safford <safford@watson.ibm.com>
6 * Reiner Sailer <sailer@watson.ibm.com>
7 * Kylene Hall <kjhall@us.ibm.com>
8 *
9 * Copyright (C) 2013 Obsidian Research Corp
10 * Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
11 *
12 * sysfs filesystem inspection interface to the TPM
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation, version 2 of the
17 * License.
18 *
19 */
20#include <linux/device.h>
21#include "tpm.h"
22
23/* XXX for now this helper is duplicated in tpm-interface.c */
24static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
25 int len, const char *desc)
26{
27 int err;
28
29 len = tpm_transmit(chip, (u8 *) cmd, len);
30 if (len < 0)
31 return len;
32 else if (len < TPM_HEADER_SIZE)
33 return -EFAULT;
34
35 err = be32_to_cpu(cmd->header.out.return_code);
36 if (err != 0 && desc)
37 dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
38
39 return err;
40}
41
42#define READ_PUBEK_RESULT_SIZE 314
43#define TPM_ORD_READPUBEK cpu_to_be32(124)
44static struct tpm_input_header tpm_readpubek_header = {
45 .tag = TPM_TAG_RQU_COMMAND,
46 .length = cpu_to_be32(30),
47 .ordinal = TPM_ORD_READPUBEK
48};
49static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
50 char *buf)
51{
52 u8 *data;
53 struct tpm_cmd_t tpm_cmd;
54 ssize_t err;
55 int i, rc;
56 char *str = buf;
57
58 struct tpm_chip *chip = dev_get_drvdata(dev);
59
60 tpm_cmd.header.in = tpm_readpubek_header;
61 err = transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
62 "attempting to read the PUBEK");
63 if (err)
64 goto out;
65
66 /*
67 ignore header 10 bytes
68 algorithm 32 bits (1 == RSA )
69 encscheme 16 bits
70 sigscheme 16 bits
71 parameters (RSA 12->bytes: keybit, #primes, expbit)
72 keylenbytes 32 bits
73 256 byte modulus
74 ignore checksum 20 bytes
75 */
76 data = tpm_cmd.params.readpubek_out_buffer;
77 str +=
78 sprintf(str,
79 "Algorithm: %02X %02X %02X %02X\n"
80 "Encscheme: %02X %02X\n"
81 "Sigscheme: %02X %02X\n"
82 "Parameters: %02X %02X %02X %02X "
83 "%02X %02X %02X %02X "
84 "%02X %02X %02X %02X\n"
85 "Modulus length: %d\n"
86 "Modulus:\n",
87 data[0], data[1], data[2], data[3],
88 data[4], data[5],
89 data[6], data[7],
90 data[12], data[13], data[14], data[15],
91 data[16], data[17], data[18], data[19],
92 data[20], data[21], data[22], data[23],
93 be32_to_cpu(*((__be32 *) (data + 24))));
94
95 for (i = 0; i < 256; i++) {
96 str += sprintf(str, "%02X ", data[i + 28]);
97 if ((i + 1) % 16 == 0)
98 str += sprintf(str, "\n");
99 }
100out:
101 rc = str - buf;
102 return rc;
103}
104static DEVICE_ATTR_RO(pubek);
105
106static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
107 char *buf)
108{
109 cap_t cap;
110 u8 digest[TPM_DIGEST_SIZE];
111 ssize_t rc;
112 int i, j, num_pcrs;
113 char *str = buf;
114 struct tpm_chip *chip = dev_get_drvdata(dev);
115
116 rc = tpm_getcap(dev, TPM_CAP_PROP_PCR, &cap,
117 "attempting to determine the number of PCRS");
118 if (rc)
119 return 0;
120
121 num_pcrs = be32_to_cpu(cap.num_pcrs);
122 for (i = 0; i < num_pcrs; i++) {
123 rc = tpm_pcr_read_dev(chip, i, digest);
124 if (rc)
125 break;
126 str += sprintf(str, "PCR-%02d: ", i);
127 for (j = 0; j < TPM_DIGEST_SIZE; j++)
128 str += sprintf(str, "%02X ", digest[j]);
129 str += sprintf(str, "\n");
130 }
131 return str - buf;
132}
133static DEVICE_ATTR_RO(pcrs);
134
135static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
136 char *buf)
137{
138 cap_t cap;
139 ssize_t rc;
140
141 rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap,
142 "attempting to determine the permanent enabled state");
143 if (rc)
144 return 0;
145
146 rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
147 return rc;
148}
149static DEVICE_ATTR_RO(enabled);
150
151static ssize_t active_show(struct device *dev, struct device_attribute *attr,
152 char *buf)
153{
154 cap_t cap;
155 ssize_t rc;
156
157 rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap,
158 "attempting to determine the permanent active state");
159 if (rc)
160 return 0;
161
162 rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
163 return rc;
164}
165static DEVICE_ATTR_RO(active);
166
167static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
168 char *buf)
169{
170 cap_t cap;
171 ssize_t rc;
172
173 rc = tpm_getcap(dev, TPM_CAP_PROP_OWNER, &cap,
174 "attempting to determine the owner state");
175 if (rc)
176 return 0;
177
178 rc = sprintf(buf, "%d\n", cap.owned);
179 return rc;
180}
181static DEVICE_ATTR_RO(owned);
182
183static ssize_t temp_deactivated_show(struct device *dev,
184 struct device_attribute *attr, char *buf)
185{
186 cap_t cap;
187 ssize_t rc;
188
189 rc = tpm_getcap(dev, TPM_CAP_FLAG_VOL, &cap,
190 "attempting to determine the temporary state");
191 if (rc)
192 return 0;
193
194 rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
195 return rc;
196}
197static DEVICE_ATTR_RO(temp_deactivated);
198
199static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
200 char *buf)
201{
202 cap_t cap;
203 ssize_t rc;
204 char *str = buf;
205
206 rc = tpm_getcap(dev, TPM_CAP_PROP_MANUFACTURER, &cap,
207 "attempting to determine the manufacturer");
208 if (rc)
209 return 0;
210 str += sprintf(str, "Manufacturer: 0x%x\n",
211 be32_to_cpu(cap.manufacturer_id));
212
213 /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
214 rc = tpm_getcap(dev, CAP_VERSION_1_2, &cap,
215 "attempting to determine the 1.2 version");
216 if (!rc) {
217 str += sprintf(str,
218 "TCG version: %d.%d\nFirmware version: %d.%d\n",
219 cap.tpm_version_1_2.Major,
220 cap.tpm_version_1_2.Minor,
221 cap.tpm_version_1_2.revMajor,
222 cap.tpm_version_1_2.revMinor);
223 } else {
224 /* Otherwise just use TPM_STRUCT_VER */
225 rc = tpm_getcap(dev, CAP_VERSION_1_1, &cap,
226 "attempting to determine the 1.1 version");
227 if (rc)
228 return 0;
229 str += sprintf(str,
230 "TCG version: %d.%d\nFirmware version: %d.%d\n",
231 cap.tpm_version.Major,
232 cap.tpm_version.Minor,
233 cap.tpm_version.revMajor,
234 cap.tpm_version.revMinor);
235 }
236
237 return str - buf;
238}
239static DEVICE_ATTR_RO(caps);
240
241static ssize_t cancel_store(struct device *dev, struct device_attribute *attr,
242 const char *buf, size_t count)
243{
244 struct tpm_chip *chip = dev_get_drvdata(dev);
245 if (chip == NULL)
246 return 0;
247
248 chip->ops->cancel(chip);
249 return count;
250}
251static DEVICE_ATTR_WO(cancel);
252
253static ssize_t durations_show(struct device *dev, struct device_attribute *attr,
254 char *buf)
255{
256 struct tpm_chip *chip = dev_get_drvdata(dev);
257
258 if (chip->vendor.duration[TPM_LONG] == 0)
259 return 0;
260
261 return sprintf(buf, "%d %d %d [%s]\n",
262 jiffies_to_usecs(chip->vendor.duration[TPM_SHORT]),
263 jiffies_to_usecs(chip->vendor.duration[TPM_MEDIUM]),
264 jiffies_to_usecs(chip->vendor.duration[TPM_LONG]),
265 chip->vendor.duration_adjusted
266 ? "adjusted" : "original");
267}
268static DEVICE_ATTR_RO(durations);
269
270static ssize_t timeouts_show(struct device *dev, struct device_attribute *attr,
271 char *buf)
272{
273 struct tpm_chip *chip = dev_get_drvdata(dev);
274
275 return sprintf(buf, "%d %d %d %d [%s]\n",
276 jiffies_to_usecs(chip->vendor.timeout_a),
277 jiffies_to_usecs(chip->vendor.timeout_b),
278 jiffies_to_usecs(chip->vendor.timeout_c),
279 jiffies_to_usecs(chip->vendor.timeout_d),
280 chip->vendor.timeout_adjusted
281 ? "adjusted" : "original");
282}
283static DEVICE_ATTR_RO(timeouts);
284
285static struct attribute *tpm_dev_attrs[] = {
286 &dev_attr_pubek.attr,
287 &dev_attr_pcrs.attr,
288 &dev_attr_enabled.attr,
289 &dev_attr_active.attr,
290 &dev_attr_owned.attr,
291 &dev_attr_temp_deactivated.attr,
292 &dev_attr_caps.attr,
293 &dev_attr_cancel.attr,
294 &dev_attr_durations.attr,
295 &dev_attr_timeouts.attr,
296 NULL,
297};
298
299static const struct attribute_group tpm_dev_group = {
300 .attrs = tpm_dev_attrs,
301};
302
303int tpm_sysfs_add_device(struct tpm_chip *chip)
304{
305 int err;
306 err = sysfs_create_group(&chip->dev->kobj,
307 &tpm_dev_group);
308
309 if (err)
310 dev_err(chip->dev,
311 "failed to create sysfs attributes, %d\n", err);
312 return err;
313}
314
315void tpm_sysfs_del_device(struct tpm_chip *chip)
316{
317 sysfs_remove_group(&chip->dev->kobj, &tpm_dev_group);
318}