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 | ||
32d33b29 | 49 | #define TPM_WARN_RETRY 0x800 |
68d6e671 | 50 | #define TPM_WARN_DOING_SELFTEST 0x802 |
be405411 SB |
51 | #define TPM_ERR_DEACTIVATED 0x6 |
52 | #define TPM_ERR_DISABLED 0x7 | |
c584af19 | 53 | #define TPM_ERR_INVALID_POSTINIT 38 |
be405411 | 54 | |
b9e3238a | 55 | #define TPM_HEADER_SIZE 10 |
6659ca2a KH |
56 | extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, |
57 | char *); | |
58 | extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, | |
59 | char *); | |
60 | extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, | |
61 | char *); | |
08e96e48 KJH |
62 | extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr, |
63 | char *); | |
6659ca2a KH |
64 | extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, |
65 | const char *, size_t); | |
08e96e48 KJH |
66 | extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr, |
67 | char *); | |
68 | extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr, | |
69 | char *); | |
70 | extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr, | |
71 | char *); | |
72 | extern ssize_t tpm_show_temp_deactivated(struct device *, | |
73 | struct device_attribute *attr, char *); | |
04ab2293 SB |
74 | extern ssize_t tpm_show_durations(struct device *, |
75 | struct device_attribute *attr, char *); | |
62592101 SB |
76 | extern ssize_t tpm_show_timeouts(struct device *, |
77 | struct device_attribute *attr, char *); | |
1da177e4 LT |
78 | |
79 | struct tpm_chip; | |
80 | ||
81 | struct tpm_vendor_specific { | |
e0dd03ca KJH |
82 | const u8 req_complete_mask; |
83 | const u8 req_complete_val; | |
1f866057 | 84 | bool (*req_canceled)(struct tpm_chip *chip, u8 status); |
ad5ea3cc KJH |
85 | void __iomem *iobase; /* ioremapped address */ |
86 | unsigned long base; /* TPM base address */ | |
87 | ||
27084efe | 88 | int irq; |
a7b66822 | 89 | int probed_irq; |
27084efe | 90 | |
ad5ea3cc KJH |
91 | int region_size; |
92 | int have_region; | |
1da177e4 LT |
93 | |
94 | int (*recv) (struct tpm_chip *, u8 *, size_t); | |
95 | int (*send) (struct tpm_chip *, u8 *, size_t); | |
96 | void (*cancel) (struct tpm_chip *); | |
b4ed3e3c | 97 | u8 (*status) (struct tpm_chip *); |
5bd91f18 | 98 | void (*release) (struct device *); |
1da177e4 | 99 | struct miscdevice miscdev; |
6659ca2a | 100 | struct attribute_group *attr_group; |
27084efe LD |
101 | struct list_head list; |
102 | int locality; | |
36b20020 | 103 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
62592101 | 104 | bool timeout_adjusted; |
36b20020 | 105 | unsigned long duration[3]; /* jiffies */ |
04ab2293 | 106 | bool duration_adjusted; |
775585e4 | 107 | void *priv; |
27084efe LD |
108 | |
109 | wait_queue_head_t read_queue; | |
110 | wait_queue_head_t int_queue; | |
3e3a5e90 SB |
111 | |
112 | u16 manufacturer_id; | |
1da177e4 LT |
113 | }; |
114 | ||
775585e4 KY |
115 | #define TPM_VPRIV(c) (c)->vendor.priv |
116 | ||
4e401fb0 | 117 | #define TPM_VID_INTEL 0x8086 |
1f866057 SB |
118 | #define TPM_VID_WINBOND 0x1050 |
119 | #define TPM_VID_STM 0x104A | |
4e401fb0 | 120 | |
1da177e4 | 121 | struct tpm_chip { |
e659a3fe | 122 | struct device *dev; /* Device stuff */ |
1da177e4 LT |
123 | |
124 | int dev_num; /* /dev/tpm# */ | |
dc36d32c | 125 | unsigned long is_open; /* only one allowed */ |
1da177e4 LT |
126 | int time_expired; |
127 | ||
128 | /* Data passed to and from the tpm via the read/write calls */ | |
129 | u8 *data_buffer; | |
130 | atomic_t data_pending; | |
d081d470 | 131 | struct mutex buffer_mutex; |
1da177e4 LT |
132 | |
133 | struct timer_list user_read_timer; /* user needs to claim result */ | |
09e12f9f | 134 | struct work_struct work; |
d081d470 | 135 | struct mutex tpm_mutex; /* tpm is processing */ |
1da177e4 | 136 | |
90dda520 | 137 | struct tpm_vendor_specific vendor; |
1da177e4 | 138 | |
55a82ab3 KJH |
139 | struct dentry **bios_dir; |
140 | ||
1da177e4 | 141 | struct list_head list; |
5bd91f18 | 142 | void (*release) (struct device *); |
1da177e4 LT |
143 | }; |
144 | ||
27084efe LD |
145 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
146 | ||
a0e39349 MZ |
147 | static inline void tpm_chip_put(struct tpm_chip *chip) |
148 | { | |
149 | module_put(chip->dev->driver->owner); | |
150 | } | |
151 | ||
daacdfa6 | 152 | static inline int tpm_read_index(int base, int index) |
1da177e4 | 153 | { |
daacdfa6 KJH |
154 | outb(index, base); |
155 | return inb(base+1) & 0xFF; | |
1da177e4 LT |
156 | } |
157 | ||
daacdfa6 | 158 | static inline void tpm_write_index(int base, int index, int value) |
1da177e4 | 159 | { |
daacdfa6 KJH |
160 | outb(index, base); |
161 | outb(value & 0xFF, base+1); | |
1da177e4 | 162 | } |
08837438 RA |
163 | struct tpm_input_header { |
164 | __be16 tag; | |
165 | __be32 length; | |
166 | __be32 ordinal; | |
348df8db | 167 | } __packed; |
08837438 RA |
168 | |
169 | struct tpm_output_header { | |
170 | __be16 tag; | |
171 | __be32 length; | |
172 | __be32 return_code; | |
348df8db | 173 | } __packed; |
08837438 RA |
174 | |
175 | struct stclear_flags_t { | |
176 | __be16 tag; | |
177 | u8 deactivated; | |
178 | u8 disableForceClear; | |
179 | u8 physicalPresence; | |
180 | u8 physicalPresenceLock; | |
181 | u8 bGlobalLock; | |
348df8db | 182 | } __packed; |
08837438 RA |
183 | |
184 | struct tpm_version_t { | |
185 | u8 Major; | |
186 | u8 Minor; | |
187 | u8 revMajor; | |
188 | u8 revMinor; | |
348df8db | 189 | } __packed; |
08837438 RA |
190 | |
191 | struct tpm_version_1_2_t { | |
192 | __be16 tag; | |
193 | u8 Major; | |
194 | u8 Minor; | |
195 | u8 revMajor; | |
196 | u8 revMinor; | |
348df8db | 197 | } __packed; |
08837438 RA |
198 | |
199 | struct timeout_t { | |
200 | __be32 a; | |
201 | __be32 b; | |
202 | __be32 c; | |
203 | __be32 d; | |
348df8db | 204 | } __packed; |
08837438 RA |
205 | |
206 | struct duration_t { | |
207 | __be32 tpm_short; | |
208 | __be32 tpm_medium; | |
209 | __be32 tpm_long; | |
348df8db | 210 | } __packed; |
08837438 RA |
211 | |
212 | struct permanent_flags_t { | |
213 | __be16 tag; | |
214 | u8 disable; | |
215 | u8 ownership; | |
216 | u8 deactivated; | |
217 | u8 readPubek; | |
218 | u8 disableOwnerClear; | |
219 | u8 allowMaintenance; | |
220 | u8 physicalPresenceLifetimeLock; | |
221 | u8 physicalPresenceHWEnable; | |
222 | u8 physicalPresenceCMDEnable; | |
223 | u8 CEKPUsed; | |
224 | u8 TPMpost; | |
225 | u8 TPMpostLock; | |
226 | u8 FIPS; | |
227 | u8 operator; | |
228 | u8 enableRevokeEK; | |
229 | u8 nvLocked; | |
230 | u8 readSRKPub; | |
231 | u8 tpmEstablished; | |
232 | u8 maintenanceDone; | |
233 | u8 disableFullDALogicInfo; | |
348df8db | 234 | } __packed; |
08837438 RA |
235 | |
236 | typedef union { | |
237 | struct permanent_flags_t perm_flags; | |
238 | struct stclear_flags_t stclear_flags; | |
239 | bool owned; | |
240 | __be32 num_pcrs; | |
241 | struct tpm_version_t tpm_version; | |
242 | struct tpm_version_1_2_t tpm_version_1_2; | |
243 | __be32 manufacturer_id; | |
244 | struct timeout_t timeout; | |
245 | struct duration_t duration; | |
246 | } cap_t; | |
247 | ||
248 | struct tpm_getcap_params_in { | |
249 | __be32 cap; | |
250 | __be32 subcap_size; | |
251 | __be32 subcap; | |
348df8db | 252 | } __packed; |
08837438 RA |
253 | |
254 | struct tpm_getcap_params_out { | |
255 | __be32 cap_size; | |
256 | cap_t cap; | |
348df8db | 257 | } __packed; |
08837438 RA |
258 | |
259 | struct tpm_readpubek_params_out { | |
260 | u8 algorithm[4]; | |
261 | u8 encscheme[2]; | |
262 | u8 sigscheme[2]; | |
02a077c5 | 263 | __be32 paramsize; |
08837438 RA |
264 | u8 parameters[12]; /*assuming RSA*/ |
265 | __be32 keysize; | |
266 | u8 modulus[256]; | |
267 | u8 checksum[20]; | |
348df8db | 268 | } __packed; |
08837438 RA |
269 | |
270 | typedef union { | |
271 | struct tpm_input_header in; | |
272 | struct tpm_output_header out; | |
273 | } tpm_cmd_header; | |
274 | ||
659aaf2b RA |
275 | struct tpm_pcrread_out { |
276 | u8 pcr_result[TPM_DIGEST_SIZE]; | |
348df8db | 277 | } __packed; |
659aaf2b RA |
278 | |
279 | struct tpm_pcrread_in { | |
280 | __be32 pcr_idx; | |
348df8db | 281 | } __packed; |
659aaf2b RA |
282 | |
283 | struct tpm_pcrextend_in { | |
284 | __be32 pcr_idx; | |
285 | u8 hash[TPM_DIGEST_SIZE]; | |
348df8db | 286 | } __packed; |
659aaf2b | 287 | |
41ab999c KY |
288 | /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 |
289 | * bytes, but 128 is still a relatively large number of random bytes and | |
290 | * anything much bigger causes users of struct tpm_cmd_t to start getting | |
291 | * compiler warnings about stack frame size. */ | |
292 | #define TPM_MAX_RNG_DATA 128 | |
293 | ||
294 | struct tpm_getrandom_out { | |
295 | __be32 rng_data_len; | |
296 | u8 rng_data[TPM_MAX_RNG_DATA]; | |
348df8db | 297 | } __packed; |
41ab999c KY |
298 | |
299 | struct tpm_getrandom_in { | |
300 | __be32 num_bytes; | |
348df8db | 301 | } __packed; |
41ab999c | 302 | |
c584af19 JG |
303 | struct tpm_startup_in { |
304 | __be16 startup_type; | |
305 | } __packed; | |
306 | ||
08837438 RA |
307 | typedef union { |
308 | struct tpm_getcap_params_out getcap_out; | |
309 | struct tpm_readpubek_params_out readpubek_out; | |
310 | u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; | |
311 | struct tpm_getcap_params_in getcap_in; | |
659aaf2b RA |
312 | struct tpm_pcrread_in pcrread_in; |
313 | struct tpm_pcrread_out pcrread_out; | |
314 | struct tpm_pcrextend_in pcrextend_in; | |
41ab999c KY |
315 | struct tpm_getrandom_in getrandom_in; |
316 | struct tpm_getrandom_out getrandom_out; | |
c584af19 | 317 | struct tpm_startup_in startup_in; |
08837438 RA |
318 | } tpm_cmd_params; |
319 | ||
320 | struct tpm_cmd_t { | |
321 | tpm_cmd_header header; | |
322 | tpm_cmd_params params; | |
348df8db | 323 | } __packed; |
08837438 RA |
324 | |
325 | ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); | |
1da177e4 | 326 | |
2b30a90f | 327 | extern int tpm_get_timeouts(struct tpm_chip *); |
08e96e48 | 328 | extern void tpm_gen_interrupt(struct tpm_chip *); |
68d6e671 | 329 | extern int tpm_do_selftest(struct tpm_chip *); |
9e18ee19 | 330 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
e0dd03ca KJH |
331 | extern struct tpm_chip* tpm_register_hardware(struct device *, |
332 | const struct tpm_vendor_specific *); | |
1da177e4 LT |
333 | extern int tpm_open(struct inode *, struct file *); |
334 | extern int tpm_release(struct inode *, struct file *); | |
e2fa3d79 | 335 | extern void tpm_dev_release(struct device *dev); |
253115b7 | 336 | extern void tpm_dev_vendor_release(struct tpm_chip *); |
1da177e4 LT |
337 | extern ssize_t tpm_write(struct file *, const char __user *, size_t, |
338 | loff_t *); | |
339 | extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); | |
e659a3fe | 340 | extern void tpm_remove_hardware(struct device *); |
035e2ce8 | 341 | extern int tpm_pm_suspend(struct device *); |
ce2c87d4 | 342 | extern int tpm_pm_resume(struct device *); |
fd048866 | 343 | extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, |
78f09cc2 | 344 | wait_queue_head_t *, bool); |
f84fdff0 XZ |
345 | |
346 | #ifdef CONFIG_ACPI | |
1631cfb7 GW |
347 | extern int tpm_add_ppi(struct kobject *); |
348 | extern void tpm_remove_ppi(struct kobject *); | |
f84fdff0 | 349 | #else |
1631cfb7 | 350 | static inline int tpm_add_ppi(struct kobject *parent) |
f84fdff0 XZ |
351 | { |
352 | return 0; | |
353 | } | |
1631cfb7 GW |
354 | |
355 | static inline void tpm_remove_ppi(struct kobject *parent) | |
356 | { | |
357 | } | |
f84fdff0 | 358 | #endif |