Commit | Line | Data |
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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). | |
13 | * Specifications at www.trustedcomputinggroup.org | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation, version 2 of the | |
18 | * License. | |
19 | * | |
20 | */ | |
21 | #include <linux/module.h> | |
1da177e4 LT |
22 | #include <linux/delay.h> |
23 | #include <linux/fs.h> | |
d081d470 | 24 | #include <linux/mutex.h> |
914e2637 | 25 | #include <linux/sched.h> |
1da177e4 | 26 | #include <linux/miscdevice.h> |
bbc5b212 | 27 | #include <linux/platform_device.h> |
276ad0c1 | 28 | #include <linux/io.h> |
659aaf2b | 29 | #include <linux/tpm.h> |
1da177e4 | 30 | |
41ab999c KY |
31 | enum tpm_const { |
32 | TPM_MINOR = 224, /* officially assigned */ | |
33 | TPM_BUFSIZE = 4096, | |
34 | TPM_NUM_DEVICES = 256, | |
32d33b29 | 35 | TPM_RETRY = 50, /* 5 seconds */ |
41ab999c KY |
36 | }; |
37 | ||
3122a88a KH |
38 | enum tpm_timeout { |
39 | TPM_TIMEOUT = 5, /* msecs */ | |
32d33b29 | 40 | TPM_TIMEOUT_RETRY = 100 /* msecs */ |
3122a88a | 41 | }; |
1da177e4 LT |
42 | |
43 | /* TPM addresses */ | |
3122a88a | 44 | enum tpm_addr { |
daacdfa6 | 45 | TPM_SUPERIO_ADDR = 0x2E, |
3122a88a | 46 | TPM_ADDR = 0x4E, |
3122a88a KH |
47 | }; |
48 | ||
000a07b0 JG |
49 | /* Indexes the duration array */ |
50 | enum tpm_duration { | |
51 | TPM_SHORT = 0, | |
52 | TPM_MEDIUM = 1, | |
53 | TPM_LONG = 2, | |
54 | TPM_UNDEFINED, | |
55 | }; | |
56 | ||
32d33b29 | 57 | #define TPM_WARN_RETRY 0x800 |
68d6e671 | 58 | #define TPM_WARN_DOING_SELFTEST 0x802 |
be405411 SB |
59 | #define TPM_ERR_DEACTIVATED 0x6 |
60 | #define TPM_ERR_DISABLED 0x7 | |
c584af19 | 61 | #define TPM_ERR_INVALID_POSTINIT 38 |
be405411 | 62 | |
b9e3238a | 63 | #define TPM_HEADER_SIZE 10 |
1da177e4 LT |
64 | struct tpm_chip; |
65 | ||
66 | struct tpm_vendor_specific { | |
ad5ea3cc KJH |
67 | void __iomem *iobase; /* ioremapped address */ |
68 | unsigned long base; /* TPM base address */ | |
69 | ||
27084efe | 70 | int irq; |
a7b66822 | 71 | int probed_irq; |
27084efe | 72 | |
ad5ea3cc KJH |
73 | int region_size; |
74 | int have_region; | |
1da177e4 | 75 | |
1da177e4 | 76 | struct miscdevice miscdev; |
27084efe LD |
77 | struct list_head list; |
78 | int locality; | |
36b20020 | 79 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
62592101 | 80 | bool timeout_adjusted; |
36b20020 | 81 | unsigned long duration[3]; /* jiffies */ |
04ab2293 | 82 | bool duration_adjusted; |
775585e4 | 83 | void *priv; |
27084efe LD |
84 | |
85 | wait_queue_head_t read_queue; | |
86 | wait_queue_head_t int_queue; | |
3e3a5e90 SB |
87 | |
88 | u16 manufacturer_id; | |
1da177e4 LT |
89 | }; |
90 | ||
775585e4 KY |
91 | #define TPM_VPRIV(c) (c)->vendor.priv |
92 | ||
4e401fb0 | 93 | #define TPM_VID_INTEL 0x8086 |
1f866057 SB |
94 | #define TPM_VID_WINBOND 0x1050 |
95 | #define TPM_VID_STM 0x104A | |
4e401fb0 | 96 | |
afb5abc2 JS |
97 | enum tpm_chip_flags { |
98 | TPM_CHIP_FLAG_REGISTERED = BIT(0), | |
99 | }; | |
100 | ||
1da177e4 | 101 | struct tpm_chip { |
e659a3fe | 102 | struct device *dev; /* Device stuff */ |
5f82e9f0 | 103 | const struct tpm_class_ops *ops; |
afb5abc2 | 104 | unsigned int flags; |
1da177e4 LT |
105 | |
106 | int dev_num; /* /dev/tpm# */ | |
6aff1fdc | 107 | char devname[7]; |
dc36d32c | 108 | unsigned long is_open; /* only one allowed */ |
1da177e4 LT |
109 | int time_expired; |
110 | ||
d081d470 | 111 | struct mutex tpm_mutex; /* tpm is processing */ |
1da177e4 | 112 | |
90dda520 | 113 | struct tpm_vendor_specific vendor; |
1da177e4 | 114 | |
55a82ab3 KJH |
115 | struct dentry **bios_dir; |
116 | ||
1da177e4 LT |
117 | struct list_head list; |
118 | }; | |
119 | ||
27084efe LD |
120 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
121 | ||
a0e39349 MZ |
122 | static inline void tpm_chip_put(struct tpm_chip *chip) |
123 | { | |
124 | module_put(chip->dev->driver->owner); | |
125 | } | |
126 | ||
daacdfa6 | 127 | static inline int tpm_read_index(int base, int index) |
1da177e4 | 128 | { |
daacdfa6 KJH |
129 | outb(index, base); |
130 | return inb(base+1) & 0xFF; | |
1da177e4 LT |
131 | } |
132 | ||
daacdfa6 | 133 | static inline void tpm_write_index(int base, int index, int value) |
1da177e4 | 134 | { |
daacdfa6 KJH |
135 | outb(index, base); |
136 | outb(value & 0xFF, base+1); | |
1da177e4 | 137 | } |
08837438 RA |
138 | struct tpm_input_header { |
139 | __be16 tag; | |
140 | __be32 length; | |
141 | __be32 ordinal; | |
348df8db | 142 | } __packed; |
08837438 RA |
143 | |
144 | struct tpm_output_header { | |
145 | __be16 tag; | |
146 | __be32 length; | |
147 | __be32 return_code; | |
348df8db | 148 | } __packed; |
08837438 | 149 | |
000a07b0 JG |
150 | #define TPM_TAG_RQU_COMMAND cpu_to_be16(193) |
151 | ||
08837438 RA |
152 | struct stclear_flags_t { |
153 | __be16 tag; | |
154 | u8 deactivated; | |
155 | u8 disableForceClear; | |
156 | u8 physicalPresence; | |
157 | u8 physicalPresenceLock; | |
158 | u8 bGlobalLock; | |
348df8db | 159 | } __packed; |
08837438 RA |
160 | |
161 | struct tpm_version_t { | |
162 | u8 Major; | |
163 | u8 Minor; | |
164 | u8 revMajor; | |
165 | u8 revMinor; | |
348df8db | 166 | } __packed; |
08837438 RA |
167 | |
168 | struct tpm_version_1_2_t { | |
169 | __be16 tag; | |
170 | u8 Major; | |
171 | u8 Minor; | |
172 | u8 revMajor; | |
173 | u8 revMinor; | |
348df8db | 174 | } __packed; |
08837438 RA |
175 | |
176 | struct timeout_t { | |
177 | __be32 a; | |
178 | __be32 b; | |
179 | __be32 c; | |
180 | __be32 d; | |
348df8db | 181 | } __packed; |
08837438 RA |
182 | |
183 | struct duration_t { | |
184 | __be32 tpm_short; | |
185 | __be32 tpm_medium; | |
186 | __be32 tpm_long; | |
348df8db | 187 | } __packed; |
08837438 RA |
188 | |
189 | struct permanent_flags_t { | |
190 | __be16 tag; | |
191 | u8 disable; | |
192 | u8 ownership; | |
193 | u8 deactivated; | |
194 | u8 readPubek; | |
195 | u8 disableOwnerClear; | |
196 | u8 allowMaintenance; | |
197 | u8 physicalPresenceLifetimeLock; | |
198 | u8 physicalPresenceHWEnable; | |
199 | u8 physicalPresenceCMDEnable; | |
200 | u8 CEKPUsed; | |
201 | u8 TPMpost; | |
202 | u8 TPMpostLock; | |
203 | u8 FIPS; | |
204 | u8 operator; | |
205 | u8 enableRevokeEK; | |
206 | u8 nvLocked; | |
207 | u8 readSRKPub; | |
208 | u8 tpmEstablished; | |
209 | u8 maintenanceDone; | |
210 | u8 disableFullDALogicInfo; | |
348df8db | 211 | } __packed; |
08837438 RA |
212 | |
213 | typedef union { | |
214 | struct permanent_flags_t perm_flags; | |
215 | struct stclear_flags_t stclear_flags; | |
216 | bool owned; | |
217 | __be32 num_pcrs; | |
218 | struct tpm_version_t tpm_version; | |
219 | struct tpm_version_1_2_t tpm_version_1_2; | |
220 | __be32 manufacturer_id; | |
221 | struct timeout_t timeout; | |
222 | struct duration_t duration; | |
223 | } cap_t; | |
224 | ||
000a07b0 JG |
225 | enum tpm_capabilities { |
226 | TPM_CAP_FLAG = cpu_to_be32(4), | |
227 | TPM_CAP_PROP = cpu_to_be32(5), | |
228 | CAP_VERSION_1_1 = cpu_to_be32(0x06), | |
229 | CAP_VERSION_1_2 = cpu_to_be32(0x1A) | |
230 | }; | |
231 | ||
232 | enum tpm_sub_capabilities { | |
233 | TPM_CAP_PROP_PCR = cpu_to_be32(0x101), | |
234 | TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103), | |
235 | TPM_CAP_FLAG_PERM = cpu_to_be32(0x108), | |
236 | TPM_CAP_FLAG_VOL = cpu_to_be32(0x109), | |
237 | TPM_CAP_PROP_OWNER = cpu_to_be32(0x111), | |
238 | TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115), | |
239 | TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120), | |
240 | ||
241 | }; | |
242 | ||
08837438 RA |
243 | struct tpm_getcap_params_in { |
244 | __be32 cap; | |
245 | __be32 subcap_size; | |
246 | __be32 subcap; | |
348df8db | 247 | } __packed; |
08837438 RA |
248 | |
249 | struct tpm_getcap_params_out { | |
250 | __be32 cap_size; | |
251 | cap_t cap; | |
348df8db | 252 | } __packed; |
08837438 RA |
253 | |
254 | struct tpm_readpubek_params_out { | |
255 | u8 algorithm[4]; | |
256 | u8 encscheme[2]; | |
257 | u8 sigscheme[2]; | |
02a077c5 | 258 | __be32 paramsize; |
08837438 RA |
259 | u8 parameters[12]; /*assuming RSA*/ |
260 | __be32 keysize; | |
261 | u8 modulus[256]; | |
262 | u8 checksum[20]; | |
348df8db | 263 | } __packed; |
08837438 RA |
264 | |
265 | typedef union { | |
266 | struct tpm_input_header in; | |
267 | struct tpm_output_header out; | |
268 | } tpm_cmd_header; | |
269 | ||
659aaf2b RA |
270 | struct tpm_pcrread_out { |
271 | u8 pcr_result[TPM_DIGEST_SIZE]; | |
348df8db | 272 | } __packed; |
659aaf2b RA |
273 | |
274 | struct tpm_pcrread_in { | |
275 | __be32 pcr_idx; | |
348df8db | 276 | } __packed; |
659aaf2b RA |
277 | |
278 | struct tpm_pcrextend_in { | |
279 | __be32 pcr_idx; | |
280 | u8 hash[TPM_DIGEST_SIZE]; | |
348df8db | 281 | } __packed; |
659aaf2b | 282 | |
41ab999c KY |
283 | /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 |
284 | * bytes, but 128 is still a relatively large number of random bytes and | |
285 | * anything much bigger causes users of struct tpm_cmd_t to start getting | |
286 | * compiler warnings about stack frame size. */ | |
287 | #define TPM_MAX_RNG_DATA 128 | |
288 | ||
289 | struct tpm_getrandom_out { | |
290 | __be32 rng_data_len; | |
291 | u8 rng_data[TPM_MAX_RNG_DATA]; | |
348df8db | 292 | } __packed; |
41ab999c KY |
293 | |
294 | struct tpm_getrandom_in { | |
295 | __be32 num_bytes; | |
348df8db | 296 | } __packed; |
41ab999c | 297 | |
c584af19 JG |
298 | struct tpm_startup_in { |
299 | __be16 startup_type; | |
300 | } __packed; | |
301 | ||
08837438 RA |
302 | typedef union { |
303 | struct tpm_getcap_params_out getcap_out; | |
304 | struct tpm_readpubek_params_out readpubek_out; | |
305 | u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; | |
306 | struct tpm_getcap_params_in getcap_in; | |
659aaf2b RA |
307 | struct tpm_pcrread_in pcrread_in; |
308 | struct tpm_pcrread_out pcrread_out; | |
309 | struct tpm_pcrextend_in pcrextend_in; | |
41ab999c KY |
310 | struct tpm_getrandom_in getrandom_in; |
311 | struct tpm_getrandom_out getrandom_out; | |
c584af19 | 312 | struct tpm_startup_in startup_in; |
08837438 RA |
313 | } tpm_cmd_params; |
314 | ||
315 | struct tpm_cmd_t { | |
316 | tpm_cmd_header header; | |
317 | tpm_cmd_params params; | |
348df8db | 318 | } __packed; |
08837438 RA |
319 | |
320 | ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); | |
afdba32e JG |
321 | ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, |
322 | size_t bufsiz); | |
87155b73 JS |
323 | ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len, |
324 | const char *desc); | |
2b30a90f | 325 | extern int tpm_get_timeouts(struct tpm_chip *); |
08e96e48 | 326 | extern void tpm_gen_interrupt(struct tpm_chip *); |
68d6e671 | 327 | extern int tpm_do_selftest(struct tpm_chip *); |
9e18ee19 | 328 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
035e2ce8 | 329 | extern int tpm_pm_suspend(struct device *); |
ce2c87d4 | 330 | extern int tpm_pm_resume(struct device *); |
fd048866 | 331 | extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, |
78f09cc2 | 332 | wait_queue_head_t *, bool); |
f84fdff0 | 333 | |
afb5abc2 JS |
334 | struct tpm_chip *tpm_chip_find_get(int chip_num); |
335 | extern struct tpm_chip *tpmm_chip_alloc(struct device *dev, | |
336 | const struct tpm_class_ops *ops); | |
337 | extern int tpm_chip_register(struct tpm_chip *chip); | |
338 | extern void tpm_chip_unregister(struct tpm_chip *chip); | |
339 | ||
afdba32e JG |
340 | int tpm_dev_add_device(struct tpm_chip *chip); |
341 | void tpm_dev_del_device(struct tpm_chip *chip); | |
1e3b73a9 JG |
342 | int tpm_sysfs_add_device(struct tpm_chip *chip); |
343 | void tpm_sysfs_del_device(struct tpm_chip *chip); | |
afdba32e | 344 | |
000a07b0 JG |
345 | int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); |
346 | ||
f84fdff0 | 347 | #ifdef CONFIG_ACPI |
1631cfb7 GW |
348 | extern int tpm_add_ppi(struct kobject *); |
349 | extern void tpm_remove_ppi(struct kobject *); | |
f84fdff0 | 350 | #else |
1631cfb7 | 351 | static inline int tpm_add_ppi(struct kobject *parent) |
f84fdff0 XZ |
352 | { |
353 | return 0; | |
354 | } | |
1631cfb7 GW |
355 | |
356 | static inline void tpm_remove_ppi(struct kobject *parent) | |
357 | { | |
358 | } | |
f84fdff0 | 359 | #endif |