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Diffstat (limited to 'drivers/char/tpm/tpm.c')
-rw-r--r--drivers/char/tpm/tpm.c786
1 files changed, 673 insertions, 113 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 5a3870477ef1..6889e7db3aff 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -32,12 +32,291 @@ enum tpm_const {
32 TPM_MINOR = 224, /* officially assigned */ 32 TPM_MINOR = 224, /* officially assigned */
33 TPM_BUFSIZE = 2048, 33 TPM_BUFSIZE = 2048,
34 TPM_NUM_DEVICES = 256, 34 TPM_NUM_DEVICES = 256,
35 TPM_NUM_MASK_ENTRIES = TPM_NUM_DEVICES / (8 * sizeof(int))
36}; 35};
37 36
37enum tpm_duration {
38 TPM_SHORT = 0,
39 TPM_MEDIUM = 1,
40 TPM_LONG = 2,
41 TPM_UNDEFINED,
42};
43
44#define TPM_MAX_ORDINAL 243
45#define TPM_MAX_PROTECTED_ORDINAL 12
46#define TPM_PROTECTED_ORDINAL_MASK 0xFF
47
38static LIST_HEAD(tpm_chip_list); 48static LIST_HEAD(tpm_chip_list);
39static DEFINE_SPINLOCK(driver_lock); 49static DEFINE_SPINLOCK(driver_lock);
40static int dev_mask[TPM_NUM_MASK_ENTRIES]; 50static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
51
52/*
53 * Array with one entry per ordinal defining the maximum amount
54 * of time the chip could take to return the result. The ordinal
55 * designation of short, medium or long is defined in a table in
56 * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
57 * values of the SHORT, MEDIUM, and LONG durations are retrieved
58 * from the chip during initialization with a call to tpm_get_timeouts.
59 */
60static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
61 TPM_UNDEFINED, /* 0 */
62 TPM_UNDEFINED,
63 TPM_UNDEFINED,
64 TPM_UNDEFINED,
65 TPM_UNDEFINED,
66 TPM_UNDEFINED, /* 5 */
67 TPM_UNDEFINED,
68 TPM_UNDEFINED,
69 TPM_UNDEFINED,
70 TPM_UNDEFINED,
71 TPM_SHORT, /* 10 */
72 TPM_SHORT,
73};
74
75static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
76 TPM_UNDEFINED, /* 0 */
77 TPM_UNDEFINED,
78 TPM_UNDEFINED,
79 TPM_UNDEFINED,
80 TPM_UNDEFINED,
81 TPM_UNDEFINED, /* 5 */
82 TPM_UNDEFINED,
83 TPM_UNDEFINED,
84 TPM_UNDEFINED,
85 TPM_UNDEFINED,
86 TPM_SHORT, /* 10 */
87 TPM_SHORT,
88 TPM_MEDIUM,
89 TPM_LONG,
90 TPM_LONG,
91 TPM_MEDIUM, /* 15 */
92 TPM_SHORT,
93 TPM_SHORT,
94 TPM_MEDIUM,
95 TPM_LONG,
96 TPM_SHORT, /* 20 */
97 TPM_SHORT,
98 TPM_MEDIUM,
99 TPM_MEDIUM,
100 TPM_MEDIUM,
101 TPM_SHORT, /* 25 */
102 TPM_SHORT,
103 TPM_MEDIUM,
104 TPM_SHORT,
105 TPM_SHORT,
106 TPM_MEDIUM, /* 30 */
107 TPM_LONG,
108 TPM_MEDIUM,
109 TPM_SHORT,
110 TPM_SHORT,
111 TPM_SHORT, /* 35 */
112 TPM_MEDIUM,
113 TPM_MEDIUM,
114 TPM_UNDEFINED,
115 TPM_UNDEFINED,
116 TPM_MEDIUM, /* 40 */
117 TPM_LONG,
118 TPM_MEDIUM,
119 TPM_SHORT,
120 TPM_SHORT,
121 TPM_SHORT, /* 45 */
122 TPM_SHORT,
123 TPM_SHORT,
124 TPM_SHORT,
125 TPM_LONG,
126 TPM_MEDIUM, /* 50 */
127 TPM_MEDIUM,
128 TPM_UNDEFINED,
129 TPM_UNDEFINED,
130 TPM_UNDEFINED,
131 TPM_UNDEFINED, /* 55 */
132 TPM_UNDEFINED,
133 TPM_UNDEFINED,
134 TPM_UNDEFINED,
135 TPM_UNDEFINED,
136 TPM_MEDIUM, /* 60 */
137 TPM_MEDIUM,
138 TPM_MEDIUM,
139 TPM_SHORT,
140 TPM_SHORT,
141 TPM_MEDIUM, /* 65 */
142 TPM_UNDEFINED,
143 TPM_UNDEFINED,
144 TPM_UNDEFINED,
145 TPM_UNDEFINED,
146 TPM_SHORT, /* 70 */
147 TPM_SHORT,
148 TPM_UNDEFINED,
149 TPM_UNDEFINED,
150 TPM_UNDEFINED,
151 TPM_UNDEFINED, /* 75 */
152 TPM_UNDEFINED,
153 TPM_UNDEFINED,
154 TPM_UNDEFINED,
155 TPM_UNDEFINED,
156 TPM_LONG, /* 80 */
157 TPM_UNDEFINED,
158 TPM_MEDIUM,
159 TPM_LONG,
160 TPM_SHORT,
161 TPM_UNDEFINED, /* 85 */
162 TPM_UNDEFINED,
163 TPM_UNDEFINED,
164 TPM_UNDEFINED,
165 TPM_UNDEFINED,
166 TPM_SHORT, /* 90 */
167 TPM_SHORT,
168 TPM_SHORT,
169 TPM_SHORT,
170 TPM_SHORT,
171 TPM_UNDEFINED, /* 95 */
172 TPM_UNDEFINED,
173 TPM_UNDEFINED,
174 TPM_UNDEFINED,
175 TPM_UNDEFINED,
176 TPM_MEDIUM, /* 100 */
177 TPM_SHORT,
178 TPM_SHORT,
179 TPM_UNDEFINED,
180 TPM_UNDEFINED,
181 TPM_UNDEFINED, /* 105 */
182 TPM_UNDEFINED,
183 TPM_UNDEFINED,
184 TPM_UNDEFINED,
185 TPM_UNDEFINED,
186 TPM_SHORT, /* 110 */
187 TPM_SHORT,
188 TPM_SHORT,
189 TPM_SHORT,
190 TPM_SHORT,
191 TPM_SHORT, /* 115 */
192 TPM_SHORT,
193 TPM_SHORT,
194 TPM_UNDEFINED,
195 TPM_UNDEFINED,
196 TPM_LONG, /* 120 */
197 TPM_LONG,
198 TPM_MEDIUM,
199 TPM_UNDEFINED,
200 TPM_SHORT,
201 TPM_SHORT, /* 125 */
202 TPM_SHORT,
203 TPM_LONG,
204 TPM_SHORT,
205 TPM_SHORT,
206 TPM_SHORT, /* 130 */
207 TPM_MEDIUM,
208 TPM_UNDEFINED,
209 TPM_SHORT,
210 TPM_MEDIUM,
211 TPM_UNDEFINED, /* 135 */
212 TPM_UNDEFINED,
213 TPM_UNDEFINED,
214 TPM_UNDEFINED,
215 TPM_UNDEFINED,
216 TPM_SHORT, /* 140 */
217 TPM_SHORT,
218 TPM_UNDEFINED,
219 TPM_UNDEFINED,
220 TPM_UNDEFINED,
221 TPM_UNDEFINED, /* 145 */
222 TPM_UNDEFINED,
223 TPM_UNDEFINED,
224 TPM_UNDEFINED,
225 TPM_UNDEFINED,
226 TPM_SHORT, /* 150 */
227 TPM_MEDIUM,
228 TPM_MEDIUM,
229 TPM_SHORT,
230 TPM_SHORT,
231 TPM_UNDEFINED, /* 155 */
232 TPM_UNDEFINED,
233 TPM_UNDEFINED,
234 TPM_UNDEFINED,
235 TPM_UNDEFINED,
236 TPM_SHORT, /* 160 */
237 TPM_SHORT,
238 TPM_SHORT,
239 TPM_SHORT,
240 TPM_UNDEFINED,
241 TPM_UNDEFINED, /* 165 */
242 TPM_UNDEFINED,
243 TPM_UNDEFINED,
244 TPM_UNDEFINED,
245 TPM_UNDEFINED,
246 TPM_LONG, /* 170 */
247 TPM_UNDEFINED,
248 TPM_UNDEFINED,
249 TPM_UNDEFINED,
250 TPM_UNDEFINED,
251 TPM_UNDEFINED, /* 175 */
252 TPM_UNDEFINED,
253 TPM_UNDEFINED,
254 TPM_UNDEFINED,
255 TPM_UNDEFINED,
256 TPM_MEDIUM, /* 180 */
257 TPM_SHORT,
258 TPM_MEDIUM,
259 TPM_MEDIUM,
260 TPM_MEDIUM,
261 TPM_MEDIUM, /* 185 */
262 TPM_SHORT,
263 TPM_UNDEFINED,
264 TPM_UNDEFINED,
265 TPM_UNDEFINED,
266 TPM_UNDEFINED, /* 190 */
267 TPM_UNDEFINED,
268 TPM_UNDEFINED,
269 TPM_UNDEFINED,
270 TPM_UNDEFINED,
271 TPM_UNDEFINED, /* 195 */
272 TPM_UNDEFINED,
273 TPM_UNDEFINED,
274 TPM_UNDEFINED,
275 TPM_UNDEFINED,
276 TPM_SHORT, /* 200 */
277 TPM_UNDEFINED,
278 TPM_UNDEFINED,
279 TPM_UNDEFINED,
280 TPM_SHORT,
281 TPM_SHORT, /* 205 */
282 TPM_SHORT,
283 TPM_SHORT,
284 TPM_SHORT,
285 TPM_SHORT,
286 TPM_MEDIUM, /* 210 */
287 TPM_UNDEFINED,
288 TPM_MEDIUM,
289 TPM_MEDIUM,
290 TPM_MEDIUM,
291 TPM_UNDEFINED, /* 215 */
292 TPM_MEDIUM,
293 TPM_UNDEFINED,
294 TPM_UNDEFINED,
295 TPM_SHORT,
296 TPM_SHORT, /* 220 */
297 TPM_SHORT,
298 TPM_SHORT,
299 TPM_SHORT,
300 TPM_SHORT,
301 TPM_UNDEFINED, /* 225 */
302 TPM_UNDEFINED,
303 TPM_UNDEFINED,
304 TPM_UNDEFINED,
305 TPM_UNDEFINED,
306 TPM_SHORT, /* 230 */
307 TPM_LONG,
308 TPM_MEDIUM,
309 TPM_UNDEFINED,
310 TPM_UNDEFINED,
311 TPM_UNDEFINED, /* 235 */
312 TPM_UNDEFINED,
313 TPM_UNDEFINED,
314 TPM_UNDEFINED,
315 TPM_UNDEFINED,
316 TPM_SHORT, /* 240 */
317 TPM_UNDEFINED,
318 TPM_MEDIUM,
319};
41 320
42static void user_reader_timeout(unsigned long ptr) 321static void user_reader_timeout(unsigned long ptr)
43{ 322{
@@ -46,7 +325,7 @@ static void user_reader_timeout(unsigned long ptr)
46 schedule_work(&chip->work); 325 schedule_work(&chip->work);
47} 326}
48 327
49static void timeout_work(void * ptr) 328static void timeout_work(void *ptr)
50{ 329{
51 struct tpm_chip *chip = ptr; 330 struct tpm_chip *chip = ptr;
52 331
@@ -57,17 +336,43 @@ static void timeout_work(void * ptr)
57} 336}
58 337
59/* 338/*
339 * Returns max number of jiffies to wait
340 */
341unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
342 u32 ordinal)
343{
344 int duration_idx = TPM_UNDEFINED;
345 int duration = 0;
346
347 if (ordinal < TPM_MAX_ORDINAL)
348 duration_idx = tpm_ordinal_duration[ordinal];
349 else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
350 TPM_MAX_PROTECTED_ORDINAL)
351 duration_idx =
352 tpm_protected_ordinal_duration[ordinal &
353 TPM_PROTECTED_ORDINAL_MASK];
354
355 if (duration_idx != TPM_UNDEFINED)
356 duration = chip->vendor.duration[duration_idx];
357 if (duration <= 0)
358 return 2 * 60 * HZ;
359 else
360 return duration;
361}
362EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
363
364/*
60 * Internal kernel interface to transmit TPM commands 365 * Internal kernel interface to transmit TPM commands
61 */ 366 */
62static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, 367static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
63 size_t bufsiz) 368 size_t bufsiz)
64{ 369{
65 ssize_t rc; 370 ssize_t rc;
66 u32 count; 371 u32 count, ordinal;
67 unsigned long stop; 372 unsigned long stop;
68 373
69 count = be32_to_cpu(*((__be32 *) (buf + 2))); 374 count = be32_to_cpu(*((__be32 *) (buf + 2)));
70 375 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
71 if (count == 0) 376 if (count == 0)
72 return -ENODATA; 377 return -ENODATA;
73 if (count > bufsiz) { 378 if (count > bufsiz) {
@@ -78,21 +383,23 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
78 383
79 down(&chip->tpm_mutex); 384 down(&chip->tpm_mutex);
80 385
81 if ((rc = chip->vendor->send(chip, (u8 *) buf, count)) < 0) { 386 if ((rc = chip->vendor.send(chip, (u8 *) buf, count)) < 0) {
82 dev_err(chip->dev, 387 dev_err(chip->dev,
83 "tpm_transmit: tpm_send: error %zd\n", rc); 388 "tpm_transmit: tpm_send: error %zd\n", rc);
84 goto out; 389 goto out;
85 } 390 }
86 391
87 stop = jiffies + 2 * 60 * HZ; 392 if (chip->vendor.irq)
393 goto out_recv;
394
395 stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
88 do { 396 do {
89 u8 status = chip->vendor->status(chip); 397 u8 status = chip->vendor.status(chip);
90 if ((status & chip->vendor->req_complete_mask) == 398 if ((status & chip->vendor.req_complete_mask) ==
91 chip->vendor->req_complete_val) { 399 chip->vendor.req_complete_val)
92 goto out_recv; 400 goto out_recv;
93 }
94 401
95 if ((status == chip->vendor->req_canceled)) { 402 if ((status == chip->vendor.req_canceled)) {
96 dev_err(chip->dev, "Operation Canceled\n"); 403 dev_err(chip->dev, "Operation Canceled\n");
97 rc = -ECANCELED; 404 rc = -ECANCELED;
98 goto out; 405 goto out;
@@ -102,14 +409,13 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
102 rmb(); 409 rmb();
103 } while (time_before(jiffies, stop)); 410 } while (time_before(jiffies, stop));
104 411
105 412 chip->vendor.cancel(chip);
106 chip->vendor->cancel(chip);
107 dev_err(chip->dev, "Operation Timed out\n"); 413 dev_err(chip->dev, "Operation Timed out\n");
108 rc = -ETIME; 414 rc = -ETIME;
109 goto out; 415 goto out;
110 416
111out_recv: 417out_recv:
112 rc = chip->vendor->recv(chip, (u8 *) buf, bufsiz); 418 rc = chip->vendor.recv(chip, (u8 *) buf, bufsiz);
113 if (rc < 0) 419 if (rc < 0)
114 dev_err(chip->dev, 420 dev_err(chip->dev,
115 "tpm_transmit: tpm_recv: error %zd\n", rc); 421 "tpm_transmit: tpm_recv: error %zd\n", rc);
@@ -119,17 +425,247 @@ out:
119} 425}
120 426
121#define TPM_DIGEST_SIZE 20 427#define TPM_DIGEST_SIZE 20
122#define CAP_PCR_RESULT_SIZE 18 428#define TPM_ERROR_SIZE 10
123static const u8 cap_pcr[] = { 429#define TPM_RET_CODE_IDX 6
430#define TPM_GET_CAP_RET_SIZE_IDX 10
431#define TPM_GET_CAP_RET_UINT32_1_IDX 14
432#define TPM_GET_CAP_RET_UINT32_2_IDX 18
433#define TPM_GET_CAP_RET_UINT32_3_IDX 22
434#define TPM_GET_CAP_RET_UINT32_4_IDX 26
435#define TPM_GET_CAP_PERM_DISABLE_IDX 16
436#define TPM_GET_CAP_PERM_INACTIVE_IDX 18
437#define TPM_GET_CAP_RET_BOOL_1_IDX 14
438#define TPM_GET_CAP_TEMP_INACTIVE_IDX 16
439
440#define TPM_CAP_IDX 13
441#define TPM_CAP_SUBCAP_IDX 21
442
443enum tpm_capabilities {
444 TPM_CAP_FLAG = 4,
445 TPM_CAP_PROP = 5,
446};
447
448enum tpm_sub_capabilities {
449 TPM_CAP_PROP_PCR = 0x1,
450 TPM_CAP_PROP_MANUFACTURER = 0x3,
451 TPM_CAP_FLAG_PERM = 0x8,
452 TPM_CAP_FLAG_VOL = 0x9,
453 TPM_CAP_PROP_OWNER = 0x11,
454 TPM_CAP_PROP_TIS_TIMEOUT = 0x15,
455 TPM_CAP_PROP_TIS_DURATION = 0x20,
456};
457
458/*
459 * This is a semi generic GetCapability command for use
460 * with the capability type TPM_CAP_PROP or TPM_CAP_FLAG
461 * and their associated sub_capabilities.
462 */
463
464static const u8 tpm_cap[] = {
124 0, 193, /* TPM_TAG_RQU_COMMAND */ 465 0, 193, /* TPM_TAG_RQU_COMMAND */
125 0, 0, 0, 22, /* length */ 466 0, 0, 0, 22, /* length */
126 0, 0, 0, 101, /* TPM_ORD_GetCapability */ 467 0, 0, 0, 101, /* TPM_ORD_GetCapability */
127 0, 0, 0, 5, 468 0, 0, 0, 0, /* TPM_CAP_<TYPE> */
128 0, 0, 0, 4, 469 0, 0, 0, 4, /* TPM_CAP_SUB_<TYPE> size */
129 0, 0, 1, 1 470 0, 0, 1, 0 /* TPM_CAP_SUB_<TYPE> */
130}; 471};
131 472
132#define READ_PCR_RESULT_SIZE 30 473static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len,
474 char *desc)
475{
476 int err;
477
478 len = tpm_transmit(chip, data, len);
479 if (len < 0)
480 return len;
481 if (len == TPM_ERROR_SIZE) {
482 err = be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)));
483 dev_dbg(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
484 return err;
485 }
486 return 0;
487}
488
489void tpm_gen_interrupt(struct tpm_chip *chip)
490{
491 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
492 ssize_t rc;
493
494 memcpy(data, tpm_cap, sizeof(tpm_cap));
495 data[TPM_CAP_IDX] = TPM_CAP_PROP;
496 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
497
498 rc = transmit_cmd(chip, data, sizeof(data),
499 "attempting to determine the timeouts");
500}
501EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
502
503void tpm_get_timeouts(struct tpm_chip *chip)
504{
505 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
506 ssize_t rc;
507 u32 timeout;
508
509 memcpy(data, tpm_cap, sizeof(tpm_cap));
510 data[TPM_CAP_IDX] = TPM_CAP_PROP;
511 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
512
513 rc = transmit_cmd(chip, data, sizeof(data),
514 "attempting to determine the timeouts");
515 if (rc)
516 goto duration;
517
518 if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
519 != 4 * sizeof(u32))
520 goto duration;
521
522 /* Don't overwrite default if value is 0 */
523 timeout =
524 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
525 if (timeout)
526 chip->vendor.timeout_a = msecs_to_jiffies(timeout);
527 timeout =
528 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
529 if (timeout)
530 chip->vendor.timeout_b = msecs_to_jiffies(timeout);
531 timeout =
532 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
533 if (timeout)
534 chip->vendor.timeout_c = msecs_to_jiffies(timeout);
535 timeout =
536 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX)));
537 if (timeout)
538 chip->vendor.timeout_d = msecs_to_jiffies(timeout);
539
540duration:
541 memcpy(data, tpm_cap, sizeof(tpm_cap));
542 data[TPM_CAP_IDX] = TPM_CAP_PROP;
543 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_DURATION;
544
545 rc = transmit_cmd(chip, data, sizeof(data),
546 "attempting to determine the durations");
547 if (rc)
548 return;
549
550 if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
551 != 3 * sizeof(u32))
552 return;
553
554 chip->vendor.duration[TPM_SHORT] =
555 msecs_to_jiffies(be32_to_cpu
556 (*((__be32 *) (data +
557 TPM_GET_CAP_RET_UINT32_1_IDX))));
558 chip->vendor.duration[TPM_MEDIUM] =
559 msecs_to_jiffies(be32_to_cpu
560 (*((__be32 *) (data +
561 TPM_GET_CAP_RET_UINT32_2_IDX))));
562 chip->vendor.duration[TPM_LONG] =
563 msecs_to_jiffies(be32_to_cpu
564 (*((__be32 *) (data +
565 TPM_GET_CAP_RET_UINT32_3_IDX))));
566}
567EXPORT_SYMBOL_GPL(tpm_get_timeouts);
568
569void tpm_continue_selftest(struct tpm_chip *chip)
570{
571 u8 data[] = {
572 0, 193, /* TPM_TAG_RQU_COMMAND */
573 0, 0, 0, 10, /* length */
574 0, 0, 0, 83, /* TPM_ORD_GetCapability */
575 };
576
577 tpm_transmit(chip, data, sizeof(data));
578}
579EXPORT_SYMBOL_GPL(tpm_continue_selftest);
580
581ssize_t tpm_show_enabled(struct device * dev, struct device_attribute * attr,
582 char *buf)
583{
584 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
585 ssize_t rc;
586
587 struct tpm_chip *chip = dev_get_drvdata(dev);
588 if (chip == NULL)
589 return -ENODEV;
590
591 memcpy(data, tpm_cap, sizeof(tpm_cap));
592 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
593 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
594
595 rc = transmit_cmd(chip, data, sizeof(data),
596 "attemtping to determine the permanent state");
597 if (rc)
598 return 0;
599 return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_DISABLE_IDX]);
600}
601EXPORT_SYMBOL_GPL(tpm_show_enabled);
602
603ssize_t tpm_show_active(struct device * dev, struct device_attribute * attr,
604 char *buf)
605{
606 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
607 ssize_t rc;
608
609 struct tpm_chip *chip = dev_get_drvdata(dev);
610 if (chip == NULL)
611 return -ENODEV;
612
613 memcpy(data, tpm_cap, sizeof(tpm_cap));
614 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
615 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
616
617 rc = transmit_cmd(chip, data, sizeof(data),
618 "attemtping to determine the permanent state");
619 if (rc)
620 return 0;
621 return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_INACTIVE_IDX]);
622}
623EXPORT_SYMBOL_GPL(tpm_show_active);
624
625ssize_t tpm_show_owned(struct device * dev, struct device_attribute * attr,
626 char *buf)
627{
628 u8 data[sizeof(tpm_cap)];
629 ssize_t rc;
630
631 struct tpm_chip *chip = dev_get_drvdata(dev);
632 if (chip == NULL)
633 return -ENODEV;
634
635 memcpy(data, tpm_cap, sizeof(tpm_cap));
636 data[TPM_CAP_IDX] = TPM_CAP_PROP;
637 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_OWNER;
638
639 rc = transmit_cmd(chip, data, sizeof(data),
640 "attempting to determine the owner state");
641 if (rc)
642 return 0;
643 return sprintf(buf, "%d\n", data[TPM_GET_CAP_RET_BOOL_1_IDX]);
644}
645EXPORT_SYMBOL_GPL(tpm_show_owned);
646
647ssize_t tpm_show_temp_deactivated(struct device * dev,
648 struct device_attribute * attr, char *buf)
649{
650 u8 data[sizeof(tpm_cap)];
651 ssize_t rc;
652
653 struct tpm_chip *chip = dev_get_drvdata(dev);
654 if (chip == NULL)
655 return -ENODEV;
656
657 memcpy(data, tpm_cap, sizeof(tpm_cap));
658 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
659 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_VOL;
660
661 rc = transmit_cmd(chip, data, sizeof(data),
662 "attempting to determine the temporary state");
663 if (rc)
664 return 0;
665 return sprintf(buf, "%d\n", data[TPM_GET_CAP_TEMP_INACTIVE_IDX]);
666}
667EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated);
668
133static const u8 pcrread[] = { 669static const u8 pcrread[] = {
134 0, 193, /* TPM_TAG_RQU_COMMAND */ 670 0, 193, /* TPM_TAG_RQU_COMMAND */
135 0, 0, 0, 14, /* length */ 671 0, 0, 0, 14, /* length */
@@ -140,8 +676,8 @@ static const u8 pcrread[] = {
140ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr, 676ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
141 char *buf) 677 char *buf)
142{ 678{
143 u8 data[READ_PCR_RESULT_SIZE]; 679 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(pcrread)), 30)];
144 ssize_t len; 680 ssize_t rc;
145 int i, j, num_pcrs; 681 int i, j, num_pcrs;
146 __be32 index; 682 __be32 index;
147 char *str = buf; 683 char *str = buf;
@@ -150,29 +686,24 @@ ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
150 if (chip == NULL) 686 if (chip == NULL)
151 return -ENODEV; 687 return -ENODEV;
152 688
153 memcpy(data, cap_pcr, sizeof(cap_pcr)); 689 memcpy(data, tpm_cap, sizeof(tpm_cap));
154 if ((len = tpm_transmit(chip, data, sizeof(data))) 690 data[TPM_CAP_IDX] = TPM_CAP_PROP;
155 < CAP_PCR_RESULT_SIZE) { 691 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_PCR;
156 dev_dbg(chip->dev, "A TPM error (%d) occurred " 692
157 "attempting to determine the number of PCRS\n", 693 rc = transmit_cmd(chip, data, sizeof(data),
158 be32_to_cpu(*((__be32 *) (data + 6)))); 694 "attempting to determine the number of PCRS");
695 if (rc)
159 return 0; 696 return 0;
160 }
161 697
162 num_pcrs = be32_to_cpu(*((__be32 *) (data + 14))); 698 num_pcrs = be32_to_cpu(*((__be32 *) (data + 14)));
163
164 for (i = 0; i < num_pcrs; i++) { 699 for (i = 0; i < num_pcrs; i++) {
165 memcpy(data, pcrread, sizeof(pcrread)); 700 memcpy(data, pcrread, sizeof(pcrread));
166 index = cpu_to_be32(i); 701 index = cpu_to_be32(i);
167 memcpy(data + 10, &index, 4); 702 memcpy(data + 10, &index, 4);
168 if ((len = tpm_transmit(chip, data, sizeof(data))) 703 rc = transmit_cmd(chip, data, sizeof(data),
169 < READ_PCR_RESULT_SIZE){ 704 "attempting to read a PCR");
170 dev_dbg(chip->dev, "A TPM error (%d) occurred" 705 if (rc)
171 " attempting to read PCR %d of %d\n",
172 be32_to_cpu(*((__be32 *) (data + 6))),
173 i, num_pcrs);
174 goto out; 706 goto out;
175 }
176 str += sprintf(str, "PCR-%02d: ", i); 707 str += sprintf(str, "PCR-%02d: ", i);
177 for (j = 0; j < TPM_DIGEST_SIZE; j++) 708 for (j = 0; j < TPM_DIGEST_SIZE; j++)
178 str += sprintf(str, "%02X ", *(data + 10 + j)); 709 str += sprintf(str, "%02X ", *(data + 10 + j));
@@ -194,7 +725,7 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
194 char *buf) 725 char *buf)
195{ 726{
196 u8 *data; 727 u8 *data;
197 ssize_t len; 728 ssize_t err;
198 int i, rc; 729 int i, rc;
199 char *str = buf; 730 char *str = buf;
200 731
@@ -208,14 +739,10 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
208 739
209 memcpy(data, readpubek, sizeof(readpubek)); 740 memcpy(data, readpubek, sizeof(readpubek));
210 741
211 if ((len = tpm_transmit(chip, data, READ_PUBEK_RESULT_SIZE)) < 742 err = transmit_cmd(chip, data, READ_PUBEK_RESULT_SIZE,
212 READ_PUBEK_RESULT_SIZE) { 743 "attempting to read the PUBEK");
213 dev_dbg(chip->dev, "A TPM error (%d) occurred " 744 if (err)
214 "attempting to read the PUBEK\n",
215 be32_to_cpu(*((__be32 *) (data + 6))));
216 rc = 0;
217 goto out; 745 goto out;
218 }
219 746
220 /* 747 /*
221 ignore header 10 bytes 748 ignore header 10 bytes
@@ -245,67 +772,110 @@ ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
245 if ((i + 1) % 16 == 0) 772 if ((i + 1) % 16 == 0)
246 str += sprintf(str, "\n"); 773 str += sprintf(str, "\n");
247 } 774 }
248 rc = str - buf;
249out: 775out:
776 rc = str - buf;
250 kfree(data); 777 kfree(data);
251 return rc; 778 return rc;
252} 779}
253EXPORT_SYMBOL_GPL(tpm_show_pubek); 780EXPORT_SYMBOL_GPL(tpm_show_pubek);
254 781
255#define CAP_VER_RESULT_SIZE 18 782#define CAP_VERSION_1_1 6
783#define CAP_VERSION_1_2 0x1A
784#define CAP_VERSION_IDX 13
256static const u8 cap_version[] = { 785static const u8 cap_version[] = {
257 0, 193, /* TPM_TAG_RQU_COMMAND */ 786 0, 193, /* TPM_TAG_RQU_COMMAND */
258 0, 0, 0, 18, /* length */ 787 0, 0, 0, 18, /* length */
259 0, 0, 0, 101, /* TPM_ORD_GetCapability */ 788 0, 0, 0, 101, /* TPM_ORD_GetCapability */
260 0, 0, 0, 6, 789 0, 0, 0, 0,
261 0, 0, 0, 0 790 0, 0, 0, 0
262}; 791};
263 792
264#define CAP_MANUFACTURER_RESULT_SIZE 18
265static const u8 cap_manufacturer[] = {
266 0, 193, /* TPM_TAG_RQU_COMMAND */
267 0, 0, 0, 22, /* length */
268 0, 0, 0, 101, /* TPM_ORD_GetCapability */
269 0, 0, 0, 5,
270 0, 0, 0, 4,
271 0, 0, 1, 3
272};
273
274ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr, 793ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr,
275 char *buf) 794 char *buf)
276{ 795{
277 u8 data[sizeof(cap_manufacturer)]; 796 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
278 ssize_t len; 797 ssize_t rc;
279 char *str = buf; 798 char *str = buf;
280 799
281 struct tpm_chip *chip = dev_get_drvdata(dev); 800 struct tpm_chip *chip = dev_get_drvdata(dev);
282 if (chip == NULL) 801 if (chip == NULL)
283 return -ENODEV; 802 return -ENODEV;
284 803
285 memcpy(data, cap_manufacturer, sizeof(cap_manufacturer)); 804 memcpy(data, tpm_cap, sizeof(tpm_cap));
805 data[TPM_CAP_IDX] = TPM_CAP_PROP;
806 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER;
286 807
287 if ((len = tpm_transmit(chip, data, sizeof(data))) < 808 rc = transmit_cmd(chip, data, sizeof(data),
288 CAP_MANUFACTURER_RESULT_SIZE) 809 "attempting to determine the manufacturer");
289 return len; 810 if (rc)
811 return 0;
290 812
291 str += sprintf(str, "Manufacturer: 0x%x\n", 813 str += sprintf(str, "Manufacturer: 0x%x\n",
292 be32_to_cpu(*((__be32 *) (data + 14)))); 814 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))));
293 815
294 memcpy(data, cap_version, sizeof(cap_version)); 816 memcpy(data, cap_version, sizeof(cap_version));
817 data[CAP_VERSION_IDX] = CAP_VERSION_1_1;
818 rc = transmit_cmd(chip, data, sizeof(data),
819 "attempting to determine the 1.1 version");
820 if (rc)
821 goto out;
295 822
296 if ((len = tpm_transmit(chip, data, sizeof(data))) < 823 str += sprintf(str,
297 CAP_VER_RESULT_SIZE) 824 "TCG version: %d.%d\nFirmware version: %d.%d\n",
298 return len; 825 (int) data[14], (int) data[15], (int) data[16],
299 826 (int) data[17]);
300 str +=
301 sprintf(str, "TCG version: %d.%d\nFirmware version: %d.%d\n",
302 (int) data[14], (int) data[15], (int) data[16],
303 (int) data[17]);
304 827
828out:
305 return str - buf; 829 return str - buf;
306} 830}
307EXPORT_SYMBOL_GPL(tpm_show_caps); 831EXPORT_SYMBOL_GPL(tpm_show_caps);
308 832
833ssize_t tpm_show_caps_1_2(struct device * dev,
834 struct device_attribute * attr, char *buf)
835{
836 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
837 ssize_t len;
838 char *str = buf;
839
840 struct tpm_chip *chip = dev_get_drvdata(dev);
841 if (chip == NULL)
842 return -ENODEV;
843
844 memcpy(data, tpm_cap, sizeof(tpm_cap));
845 data[TPM_CAP_IDX] = TPM_CAP_PROP;
846 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER;
847
848 if ((len = tpm_transmit(chip, data, sizeof(data))) <=
849 TPM_ERROR_SIZE) {
850 dev_dbg(chip->dev, "A TPM error (%d) occurred "
851 "attempting to determine the manufacturer\n",
852 be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
853 return 0;
854 }
855
856 str += sprintf(str, "Manufacturer: 0x%x\n",
857 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))));
858
859 memcpy(data, cap_version, sizeof(cap_version));
860 data[CAP_VERSION_IDX] = CAP_VERSION_1_2;
861
862 if ((len = tpm_transmit(chip, data, sizeof(data))) <=
863 TPM_ERROR_SIZE) {
864 dev_err(chip->dev, "A TPM error (%d) occurred "
865 "attempting to determine the 1.2 version\n",
866 be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
867 goto out;
868 }
869 str += sprintf(str,
870 "TCG version: %d.%d\nFirmware version: %d.%d\n",
871 (int) data[16], (int) data[17], (int) data[18],
872 (int) data[19]);
873
874out:
875 return str - buf;
876}
877EXPORT_SYMBOL_GPL(tpm_show_caps_1_2);
878
309ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr, 879ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
310 const char *buf, size_t count) 880 const char *buf, size_t count)
311{ 881{
@@ -313,7 +883,7 @@ ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
313 if (chip == NULL) 883 if (chip == NULL)
314 return 0; 884 return 0;
315 885
316 chip->vendor->cancel(chip); 886 chip->vendor.cancel(chip);
317 return count; 887 return count;
318} 888}
319EXPORT_SYMBOL_GPL(tpm_store_cancel); 889EXPORT_SYMBOL_GPL(tpm_store_cancel);
@@ -329,7 +899,7 @@ int tpm_open(struct inode *inode, struct file *file)
329 spin_lock(&driver_lock); 899 spin_lock(&driver_lock);
330 900
331 list_for_each_entry(pos, &tpm_chip_list, list) { 901 list_for_each_entry(pos, &tpm_chip_list, list) {
332 if (pos->vendor->miscdev.minor == minor) { 902 if (pos->vendor.miscdev.minor == minor) {
333 chip = pos; 903 chip = pos;
334 break; 904 break;
335 } 905 }
@@ -387,7 +957,7 @@ int tpm_release(struct inode *inode, struct file *file)
387EXPORT_SYMBOL_GPL(tpm_release); 957EXPORT_SYMBOL_GPL(tpm_release);
388 958
389ssize_t tpm_write(struct file *file, const char __user *buf, 959ssize_t tpm_write(struct file *file, const char __user *buf,
390 size_t size, loff_t * off) 960 size_t size, loff_t *off)
391{ 961{
392 struct tpm_chip *chip = file->private_data; 962 struct tpm_chip *chip = file->private_data;
393 int in_size = size, out_size; 963 int in_size = size, out_size;
@@ -419,11 +989,10 @@ ssize_t tpm_write(struct file *file, const char __user *buf,
419 989
420 return in_size; 990 return in_size;
421} 991}
422
423EXPORT_SYMBOL_GPL(tpm_write); 992EXPORT_SYMBOL_GPL(tpm_write);
424 993
425ssize_t tpm_read(struct file * file, char __user *buf, 994ssize_t tpm_read(struct file *file, char __user *buf,
426 size_t size, loff_t * off) 995 size_t size, loff_t *off)
427{ 996{
428 struct tpm_chip *chip = file->private_data; 997 struct tpm_chip *chip = file->private_data;
429 int ret_size; 998 int ret_size;
@@ -462,14 +1031,13 @@ void tpm_remove_hardware(struct device *dev)
462 spin_unlock(&driver_lock); 1031 spin_unlock(&driver_lock);
463 1032
464 dev_set_drvdata(dev, NULL); 1033 dev_set_drvdata(dev, NULL);
465 misc_deregister(&chip->vendor->miscdev); 1034 misc_deregister(&chip->vendor.miscdev);
466 kfree(chip->vendor->miscdev.name); 1035 kfree(chip->vendor.miscdev.name);
467 1036
468 sysfs_remove_group(&dev->kobj, chip->vendor->attr_group); 1037 sysfs_remove_group(&dev->kobj, chip->vendor.attr_group);
469 tpm_bios_log_teardown(chip->bios_dir); 1038 tpm_bios_log_teardown(chip->bios_dir);
470 1039
471 dev_mask[chip->dev_num / TPM_NUM_MASK_ENTRIES ] &= 1040 clear_bit(chip->dev_num, dev_mask);
472 ~(1 << (chip->dev_num % TPM_NUM_MASK_ENTRIES));
473 1041
474 kfree(chip); 1042 kfree(chip);
475 1043
@@ -520,18 +1088,18 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
520 * upon errant exit from this function specific probe function should call 1088 * upon errant exit from this function specific probe function should call
521 * pci_disable_device 1089 * pci_disable_device
522 */ 1090 */
523int tpm_register_hardware(struct device *dev, struct tpm_vendor_specific *entry) 1091struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vendor_specific
1092 *entry)
524{ 1093{
525#define DEVNAME_SIZE 7 1094#define DEVNAME_SIZE 7
526 1095
527 char *devname; 1096 char *devname;
528 struct tpm_chip *chip; 1097 struct tpm_chip *chip;
529 int i, j;
530 1098
531 /* Driver specific per-device data */ 1099 /* Driver specific per-device data */
532 chip = kzalloc(sizeof(*chip), GFP_KERNEL); 1100 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
533 if (chip == NULL) 1101 if (chip == NULL)
534 return -ENOMEM; 1102 return NULL;
535 1103
536 init_MUTEX(&chip->buffer_mutex); 1104 init_MUTEX(&chip->buffer_mutex);
537 init_MUTEX(&chip->tpm_mutex); 1105 init_MUTEX(&chip->tpm_mutex);
@@ -543,45 +1111,37 @@ int tpm_register_hardware(struct device *dev, struct tpm_vendor_specific *entry)
543 chip->user_read_timer.function = user_reader_timeout; 1111 chip->user_read_timer.function = user_reader_timeout;
544 chip->user_read_timer.data = (unsigned long) chip; 1112 chip->user_read_timer.data = (unsigned long) chip;
545 1113
546 chip->vendor = entry; 1114 memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
547
548 chip->dev_num = -1;
549 1115
550 for (i = 0; i < TPM_NUM_MASK_ENTRIES; i++) 1116 chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
551 for (j = 0; j < 8 * sizeof(int); j++)
552 if ((dev_mask[i] & (1 << j)) == 0) {
553 chip->dev_num =
554 i * TPM_NUM_MASK_ENTRIES + j;
555 dev_mask[i] |= 1 << j;
556 goto dev_num_search_complete;
557 }
558 1117
559dev_num_search_complete: 1118 if (chip->dev_num >= TPM_NUM_DEVICES) {
560 if (chip->dev_num < 0) {
561 dev_err(dev, "No available tpm device numbers\n"); 1119 dev_err(dev, "No available tpm device numbers\n");
562 kfree(chip); 1120 kfree(chip);
563 return -ENODEV; 1121 return NULL;
564 } else if (chip->dev_num == 0) 1122 } else if (chip->dev_num == 0)
565 chip->vendor->miscdev.minor = TPM_MINOR; 1123 chip->vendor.miscdev.minor = TPM_MINOR;
566 else 1124 else
567 chip->vendor->miscdev.minor = MISC_DYNAMIC_MINOR; 1125 chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
1126
1127 set_bit(chip->dev_num, dev_mask);
568 1128
569 devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL); 1129 devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL);
570 scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num); 1130 scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num);
571 chip->vendor->miscdev.name = devname; 1131 chip->vendor.miscdev.name = devname;
572 1132
573 chip->vendor->miscdev.dev = dev; 1133 chip->vendor.miscdev.dev = dev;
574 chip->dev = get_device(dev); 1134 chip->dev = get_device(dev);
575 1135
576 if (misc_register(&chip->vendor->miscdev)) { 1136 if (misc_register(&chip->vendor.miscdev)) {
577 dev_err(chip->dev, 1137 dev_err(chip->dev,
578 "unable to misc_register %s, minor %d\n", 1138 "unable to misc_register %s, minor %d\n",
579 chip->vendor->miscdev.name, 1139 chip->vendor.miscdev.name,
580 chip->vendor->miscdev.minor); 1140 chip->vendor.miscdev.minor);
581 put_device(dev); 1141 put_device(dev);
1142 clear_bit(chip->dev_num, dev_mask);
582 kfree(chip); 1143 kfree(chip);
583 dev_mask[i] &= !(1 << j); 1144 return NULL;
584 return -ENODEV;
585 } 1145 }
586 1146
587 spin_lock(&driver_lock); 1147 spin_lock(&driver_lock);
@@ -592,11 +1152,11 @@ dev_num_search_complete:
592 1152
593 spin_unlock(&driver_lock); 1153 spin_unlock(&driver_lock);
594 1154
595 sysfs_create_group(&dev->kobj, chip->vendor->attr_group); 1155 sysfs_create_group(&dev->kobj, chip->vendor.attr_group);
596 1156
597 chip->bios_dir = tpm_bios_log_setup(devname); 1157 chip->bios_dir = tpm_bios_log_setup(devname);
598 1158
599 return 0; 1159 return chip;
600} 1160}
601EXPORT_SYMBOL_GPL(tpm_register_hardware); 1161EXPORT_SYMBOL_GPL(tpm_register_hardware);
602 1162
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-12 13:45:55 -0500