Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | * | |
8e81cc13 | 10 | * Maintained by: <tpmdd-devel@lists.sourceforge.net> |
1da177e4 LT |
11 | * |
12 | * Device driver for TCG/TCPA TPM (trusted platform module). | |
3b09825d | 13 | * Specifications at www.trustedcomputinggroup.org |
1da177e4 LT |
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. | |
3b09825d | 19 | * |
1da177e4 LT |
20 | */ |
21 | #include <linux/module.h> | |
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/fs.h> | |
d081d470 | 24 | #include <linux/mutex.h> |
914e2637 | 25 | #include <linux/sched.h> |
bbc5b212 | 26 | #include <linux/platform_device.h> |
276ad0c1 | 27 | #include <linux/io.h> |
659aaf2b | 28 | #include <linux/tpm.h> |
0dc55365 | 29 | #include <linux/acpi.h> |
313d21ee | 30 | #include <linux/cdev.h> |
1da177e4 | 31 | |
41ab999c KY |
32 | enum tpm_const { |
33 | TPM_MINOR = 224, /* officially assigned */ | |
34 | TPM_BUFSIZE = 4096, | |
35 | TPM_NUM_DEVICES = 256, | |
32d33b29 | 36 | TPM_RETRY = 50, /* 5 seconds */ |
41ab999c KY |
37 | }; |
38 | ||
3122a88a KH |
39 | enum tpm_timeout { |
40 | TPM_TIMEOUT = 5, /* msecs */ | |
32d33b29 | 41 | TPM_TIMEOUT_RETRY = 100 /* msecs */ |
3122a88a | 42 | }; |
1da177e4 LT |
43 | |
44 | /* TPM addresses */ | |
3122a88a | 45 | enum tpm_addr { |
daacdfa6 | 46 | TPM_SUPERIO_ADDR = 0x2E, |
3122a88a | 47 | TPM_ADDR = 0x4E, |
3122a88a KH |
48 | }; |
49 | ||
000a07b0 JG |
50 | /* Indexes the duration array */ |
51 | enum tpm_duration { | |
52 | TPM_SHORT = 0, | |
53 | TPM_MEDIUM = 1, | |
54 | TPM_LONG = 2, | |
55 | TPM_UNDEFINED, | |
56 | }; | |
57 | ||
32d33b29 | 58 | #define TPM_WARN_RETRY 0x800 |
68d6e671 | 59 | #define TPM_WARN_DOING_SELFTEST 0x802 |
be405411 SB |
60 | #define TPM_ERR_DEACTIVATED 0x6 |
61 | #define TPM_ERR_DISABLED 0x7 | |
c584af19 | 62 | #define TPM_ERR_INVALID_POSTINIT 38 |
be405411 | 63 | |
b9e3238a | 64 | #define TPM_HEADER_SIZE 10 |
7a1d7e6d JS |
65 | |
66 | enum tpm2_const { | |
67 | TPM2_PLATFORM_PCR = 24, | |
68 | TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8), | |
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 | }; | |
77 | ||
78 | enum tpm2_structures { | |
79 | TPM2_ST_NO_SESSIONS = 0x8001, | |
80 | TPM2_ST_SESSIONS = 0x8002, | |
81 | }; | |
82 | ||
83 | enum tpm2_return_codes { | |
84 | TPM2_RC_INITIALIZE = 0x0100, | |
85 | TPM2_RC_TESTING = 0x090A, | |
86 | TPM2_RC_DISABLED = 0x0120, | |
87 | }; | |
88 | ||
89 | enum tpm2_algorithms { | |
90 | TPM2_ALG_SHA1 = 0x0004, | |
91 | }; | |
92 | ||
93 | enum tpm2_command_codes { | |
94 | TPM2_CC_FIRST = 0x011F, | |
95 | TPM2_CC_SELF_TEST = 0x0143, | |
96 | TPM2_CC_STARTUP = 0x0144, | |
97 | TPM2_CC_SHUTDOWN = 0x0145, | |
98 | TPM2_CC_GET_CAPABILITY = 0x017A, | |
99 | TPM2_CC_GET_RANDOM = 0x017B, | |
100 | TPM2_CC_PCR_READ = 0x017E, | |
101 | TPM2_CC_PCR_EXTEND = 0x0182, | |
102 | TPM2_CC_LAST = 0x018F, | |
103 | }; | |
104 | ||
105 | enum tpm2_permanent_handles { | |
106 | TPM2_RS_PW = 0x40000009, | |
107 | }; | |
108 | ||
109 | enum tpm2_capabilities { | |
110 | TPM2_CAP_TPM_PROPERTIES = 6, | |
111 | }; | |
112 | ||
113 | enum tpm2_startup_types { | |
114 | TPM2_SU_CLEAR = 0x0000, | |
115 | TPM2_SU_STATE = 0x0001, | |
116 | }; | |
117 | ||
1da177e4 LT |
118 | struct tpm_chip; |
119 | ||
120 | struct tpm_vendor_specific { | |
ad5ea3cc KJH |
121 | void __iomem *iobase; /* ioremapped address */ |
122 | unsigned long base; /* TPM base address */ | |
123 | ||
27084efe | 124 | int irq; |
a7b66822 | 125 | int probed_irq; |
27084efe | 126 | |
ad5ea3cc KJH |
127 | int region_size; |
128 | int have_region; | |
1da177e4 | 129 | |
27084efe LD |
130 | struct list_head list; |
131 | int locality; | |
36b20020 | 132 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
62592101 | 133 | bool timeout_adjusted; |
36b20020 | 134 | unsigned long duration[3]; /* jiffies */ |
04ab2293 | 135 | bool duration_adjusted; |
775585e4 | 136 | void *priv; |
27084efe LD |
137 | |
138 | wait_queue_head_t read_queue; | |
139 | wait_queue_head_t int_queue; | |
3e3a5e90 SB |
140 | |
141 | u16 manufacturer_id; | |
1da177e4 LT |
142 | }; |
143 | ||
3b09825d | 144 | #define TPM_VPRIV(c) ((c)->vendor.priv) |
775585e4 | 145 | |
4e401fb0 | 146 | #define TPM_VID_INTEL 0x8086 |
1f866057 SB |
147 | #define TPM_VID_WINBOND 0x1050 |
148 | #define TPM_VID_STM 0x104A | |
4e401fb0 | 149 | |
0dc55365 JS |
150 | #define TPM_PPI_VERSION_LEN 3 |
151 | ||
afb5abc2 JS |
152 | enum tpm_chip_flags { |
153 | TPM_CHIP_FLAG_REGISTERED = BIT(0), | |
0dc55365 | 154 | TPM_CHIP_FLAG_PPI = BIT(1), |
7a1d7e6d | 155 | TPM_CHIP_FLAG_TPM2 = BIT(2), |
afb5abc2 JS |
156 | }; |
157 | ||
1da177e4 | 158 | struct tpm_chip { |
71ed848f | 159 | struct device *pdev; /* Device stuff */ |
313d21ee JS |
160 | struct device dev; |
161 | struct cdev cdev; | |
162 | ||
5f82e9f0 | 163 | const struct tpm_class_ops *ops; |
afb5abc2 | 164 | unsigned int flags; |
1da177e4 LT |
165 | |
166 | int dev_num; /* /dev/tpm# */ | |
6aff1fdc | 167 | char devname[7]; |
dc36d32c | 168 | unsigned long is_open; /* only one allowed */ |
1da177e4 LT |
169 | int time_expired; |
170 | ||
d081d470 | 171 | struct mutex tpm_mutex; /* tpm is processing */ |
1da177e4 | 172 | |
90dda520 | 173 | struct tpm_vendor_specific vendor; |
1da177e4 | 174 | |
55a82ab3 KJH |
175 | struct dentry **bios_dir; |
176 | ||
0dc55365 JS |
177 | #ifdef CONFIG_ACPI |
178 | acpi_handle acpi_dev_handle; | |
179 | char ppi_version[TPM_PPI_VERSION_LEN + 1]; | |
180 | #endif /* CONFIG_ACPI */ | |
181 | ||
1da177e4 LT |
182 | struct list_head list; |
183 | }; | |
184 | ||
27084efe LD |
185 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
186 | ||
a0e39349 MZ |
187 | static inline void tpm_chip_put(struct tpm_chip *chip) |
188 | { | |
71ed848f | 189 | module_put(chip->pdev->driver->owner); |
a0e39349 MZ |
190 | } |
191 | ||
daacdfa6 | 192 | static inline int tpm_read_index(int base, int index) |
1da177e4 | 193 | { |
daacdfa6 KJH |
194 | outb(index, base); |
195 | return inb(base+1) & 0xFF; | |
1da177e4 LT |
196 | } |
197 | ||
daacdfa6 | 198 | static inline void tpm_write_index(int base, int index, int value) |
1da177e4 | 199 | { |
daacdfa6 KJH |
200 | outb(index, base); |
201 | outb(value & 0xFF, base+1); | |
1da177e4 | 202 | } |
08837438 RA |
203 | struct tpm_input_header { |
204 | __be16 tag; | |
205 | __be32 length; | |
206 | __be32 ordinal; | |
348df8db | 207 | } __packed; |
08837438 RA |
208 | |
209 | struct tpm_output_header { | |
210 | __be16 tag; | |
211 | __be32 length; | |
212 | __be32 return_code; | |
348df8db | 213 | } __packed; |
08837438 | 214 | |
000a07b0 JG |
215 | #define TPM_TAG_RQU_COMMAND cpu_to_be16(193) |
216 | ||
08837438 RA |
217 | struct stclear_flags_t { |
218 | __be16 tag; | |
219 | u8 deactivated; | |
220 | u8 disableForceClear; | |
221 | u8 physicalPresence; | |
222 | u8 physicalPresenceLock; | |
223 | u8 bGlobalLock; | |
348df8db | 224 | } __packed; |
08837438 RA |
225 | |
226 | struct tpm_version_t { | |
227 | u8 Major; | |
228 | u8 Minor; | |
229 | u8 revMajor; | |
230 | u8 revMinor; | |
348df8db | 231 | } __packed; |
08837438 RA |
232 | |
233 | struct tpm_version_1_2_t { | |
234 | __be16 tag; | |
235 | u8 Major; | |
236 | u8 Minor; | |
237 | u8 revMajor; | |
238 | u8 revMinor; | |
348df8db | 239 | } __packed; |
08837438 RA |
240 | |
241 | struct timeout_t { | |
242 | __be32 a; | |
243 | __be32 b; | |
244 | __be32 c; | |
245 | __be32 d; | |
348df8db | 246 | } __packed; |
08837438 RA |
247 | |
248 | struct duration_t { | |
249 | __be32 tpm_short; | |
250 | __be32 tpm_medium; | |
251 | __be32 tpm_long; | |
348df8db | 252 | } __packed; |
08837438 RA |
253 | |
254 | struct permanent_flags_t { | |
255 | __be16 tag; | |
256 | u8 disable; | |
257 | u8 ownership; | |
258 | u8 deactivated; | |
259 | u8 readPubek; | |
260 | u8 disableOwnerClear; | |
261 | u8 allowMaintenance; | |
262 | u8 physicalPresenceLifetimeLock; | |
263 | u8 physicalPresenceHWEnable; | |
264 | u8 physicalPresenceCMDEnable; | |
265 | u8 CEKPUsed; | |
266 | u8 TPMpost; | |
267 | u8 TPMpostLock; | |
268 | u8 FIPS; | |
269 | u8 operator; | |
270 | u8 enableRevokeEK; | |
271 | u8 nvLocked; | |
272 | u8 readSRKPub; | |
273 | u8 tpmEstablished; | |
274 | u8 maintenanceDone; | |
275 | u8 disableFullDALogicInfo; | |
348df8db | 276 | } __packed; |
08837438 RA |
277 | |
278 | typedef union { | |
279 | struct permanent_flags_t perm_flags; | |
280 | struct stclear_flags_t stclear_flags; | |
281 | bool owned; | |
282 | __be32 num_pcrs; | |
283 | struct tpm_version_t tpm_version; | |
284 | struct tpm_version_1_2_t tpm_version_1_2; | |
285 | __be32 manufacturer_id; | |
286 | struct timeout_t timeout; | |
287 | struct duration_t duration; | |
288 | } cap_t; | |
289 | ||
000a07b0 JG |
290 | enum tpm_capabilities { |
291 | TPM_CAP_FLAG = cpu_to_be32(4), | |
292 | TPM_CAP_PROP = cpu_to_be32(5), | |
293 | CAP_VERSION_1_1 = cpu_to_be32(0x06), | |
294 | CAP_VERSION_1_2 = cpu_to_be32(0x1A) | |
295 | }; | |
296 | ||
297 | enum tpm_sub_capabilities { | |
298 | TPM_CAP_PROP_PCR = cpu_to_be32(0x101), | |
299 | TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103), | |
300 | TPM_CAP_FLAG_PERM = cpu_to_be32(0x108), | |
301 | TPM_CAP_FLAG_VOL = cpu_to_be32(0x109), | |
302 | TPM_CAP_PROP_OWNER = cpu_to_be32(0x111), | |
303 | TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115), | |
304 | TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120), | |
305 | ||
306 | }; | |
307 | ||
08837438 RA |
308 | struct tpm_getcap_params_in { |
309 | __be32 cap; | |
310 | __be32 subcap_size; | |
311 | __be32 subcap; | |
348df8db | 312 | } __packed; |
08837438 RA |
313 | |
314 | struct tpm_getcap_params_out { | |
315 | __be32 cap_size; | |
316 | cap_t cap; | |
348df8db | 317 | } __packed; |
08837438 RA |
318 | |
319 | struct tpm_readpubek_params_out { | |
320 | u8 algorithm[4]; | |
321 | u8 encscheme[2]; | |
322 | u8 sigscheme[2]; | |
02a077c5 | 323 | __be32 paramsize; |
08837438 RA |
324 | u8 parameters[12]; /*assuming RSA*/ |
325 | __be32 keysize; | |
326 | u8 modulus[256]; | |
327 | u8 checksum[20]; | |
348df8db | 328 | } __packed; |
08837438 RA |
329 | |
330 | typedef union { | |
331 | struct tpm_input_header in; | |
332 | struct tpm_output_header out; | |
333 | } tpm_cmd_header; | |
334 | ||
659aaf2b RA |
335 | struct tpm_pcrread_out { |
336 | u8 pcr_result[TPM_DIGEST_SIZE]; | |
348df8db | 337 | } __packed; |
659aaf2b RA |
338 | |
339 | struct tpm_pcrread_in { | |
340 | __be32 pcr_idx; | |
348df8db | 341 | } __packed; |
659aaf2b RA |
342 | |
343 | struct tpm_pcrextend_in { | |
344 | __be32 pcr_idx; | |
345 | u8 hash[TPM_DIGEST_SIZE]; | |
348df8db | 346 | } __packed; |
659aaf2b | 347 | |
41ab999c KY |
348 | /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 |
349 | * bytes, but 128 is still a relatively large number of random bytes and | |
350 | * anything much bigger causes users of struct tpm_cmd_t to start getting | |
351 | * compiler warnings about stack frame size. */ | |
352 | #define TPM_MAX_RNG_DATA 128 | |
353 | ||
354 | struct tpm_getrandom_out { | |
355 | __be32 rng_data_len; | |
356 | u8 rng_data[TPM_MAX_RNG_DATA]; | |
348df8db | 357 | } __packed; |
41ab999c KY |
358 | |
359 | struct tpm_getrandom_in { | |
360 | __be32 num_bytes; | |
348df8db | 361 | } __packed; |
41ab999c | 362 | |
c584af19 JG |
363 | struct tpm_startup_in { |
364 | __be16 startup_type; | |
365 | } __packed; | |
366 | ||
08837438 RA |
367 | typedef union { |
368 | struct tpm_getcap_params_out getcap_out; | |
369 | struct tpm_readpubek_params_out readpubek_out; | |
370 | u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; | |
371 | struct tpm_getcap_params_in getcap_in; | |
659aaf2b RA |
372 | struct tpm_pcrread_in pcrread_in; |
373 | struct tpm_pcrread_out pcrread_out; | |
374 | struct tpm_pcrextend_in pcrextend_in; | |
41ab999c KY |
375 | struct tpm_getrandom_in getrandom_in; |
376 | struct tpm_getrandom_out getrandom_out; | |
c584af19 | 377 | struct tpm_startup_in startup_in; |
08837438 RA |
378 | } tpm_cmd_params; |
379 | ||
380 | struct tpm_cmd_t { | |
381 | tpm_cmd_header header; | |
382 | tpm_cmd_params params; | |
348df8db | 383 | } __packed; |
08837438 | 384 | |
313d21ee JS |
385 | extern struct class *tpm_class; |
386 | extern dev_t tpm_devt; | |
387 | extern const struct file_operations tpm_fops; | |
388 | ||
08837438 | 389 | ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); |
afdba32e JG |
390 | ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, |
391 | size_t bufsiz); | |
87155b73 JS |
392 | ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len, |
393 | const char *desc); | |
2b30a90f | 394 | extern int tpm_get_timeouts(struct tpm_chip *); |
08e96e48 | 395 | extern void tpm_gen_interrupt(struct tpm_chip *); |
68d6e671 | 396 | extern int tpm_do_selftest(struct tpm_chip *); |
9e18ee19 | 397 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
035e2ce8 | 398 | extern int tpm_pm_suspend(struct device *); |
ce2c87d4 | 399 | extern int tpm_pm_resume(struct device *); |
fd048866 | 400 | extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, |
78f09cc2 | 401 | wait_queue_head_t *, bool); |
f84fdff0 | 402 | |
afb5abc2 JS |
403 | struct tpm_chip *tpm_chip_find_get(int chip_num); |
404 | extern struct tpm_chip *tpmm_chip_alloc(struct device *dev, | |
405 | const struct tpm_class_ops *ops); | |
406 | extern int tpm_chip_register(struct tpm_chip *chip); | |
407 | extern void tpm_chip_unregister(struct tpm_chip *chip); | |
408 | ||
1e3b73a9 JG |
409 | int tpm_sysfs_add_device(struct tpm_chip *chip); |
410 | void tpm_sysfs_del_device(struct tpm_chip *chip); | |
afdba32e | 411 | |
000a07b0 JG |
412 | int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); |
413 | ||
f84fdff0 | 414 | #ifdef CONFIG_ACPI |
0dc55365 JS |
415 | extern int tpm_add_ppi(struct tpm_chip *chip); |
416 | extern void tpm_remove_ppi(struct tpm_chip *chip); | |
f84fdff0 | 417 | #else |
0dc55365 | 418 | static inline int tpm_add_ppi(struct tpm_chip *chip) |
f84fdff0 XZ |
419 | { |
420 | return 0; | |
421 | } | |
1631cfb7 | 422 | |
0dc55365 | 423 | static inline void tpm_remove_ppi(struct tpm_chip *chip) |
1631cfb7 GW |
424 | { |
425 | } | |
f84fdff0 | 426 | #endif |
7a1d7e6d JS |
427 | |
428 | int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); | |
429 | int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash); | |
430 | int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max); | |
431 | ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, | |
432 | u32 *value, const char *desc); | |
433 | ||
434 | extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type); | |
74d6b3ce | 435 | extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type); |
7a1d7e6d JS |
436 | extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32); |
437 | extern int tpm2_do_selftest(struct tpm_chip *chip); | |
4d5f2051 JS |
438 | extern int tpm2_gen_interrupt(struct tpm_chip *chip); |
439 | extern int tpm2_probe(struct tpm_chip *chip); |