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 | |
3122a88a KH |
31 | enum tpm_timeout { |
32 | TPM_TIMEOUT = 5, /* msecs */ | |
33 | }; | |
1da177e4 LT |
34 | |
35 | /* TPM addresses */ | |
3122a88a | 36 | enum tpm_addr { |
daacdfa6 | 37 | TPM_SUPERIO_ADDR = 0x2E, |
3122a88a | 38 | TPM_ADDR = 0x4E, |
3122a88a KH |
39 | }; |
40 | ||
68d6e671 | 41 | #define TPM_WARN_DOING_SELFTEST 0x802 |
be405411 SB |
42 | #define TPM_ERR_DEACTIVATED 0x6 |
43 | #define TPM_ERR_DISABLED 0x7 | |
44 | ||
b9e3238a | 45 | #define TPM_HEADER_SIZE 10 |
6659ca2a KH |
46 | extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, |
47 | char *); | |
48 | extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, | |
49 | char *); | |
50 | extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, | |
51 | char *); | |
08e96e48 KJH |
52 | extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr, |
53 | char *); | |
6659ca2a KH |
54 | extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, |
55 | const char *, size_t); | |
08e96e48 KJH |
56 | extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr, |
57 | char *); | |
58 | extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr, | |
59 | char *); | |
60 | extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr, | |
61 | char *); | |
62 | extern ssize_t tpm_show_temp_deactivated(struct device *, | |
63 | struct device_attribute *attr, char *); | |
04ab2293 SB |
64 | extern ssize_t tpm_show_durations(struct device *, |
65 | struct device_attribute *attr, char *); | |
62592101 SB |
66 | extern ssize_t tpm_show_timeouts(struct device *, |
67 | struct device_attribute *attr, char *); | |
1da177e4 LT |
68 | |
69 | struct tpm_chip; | |
70 | ||
71 | struct tpm_vendor_specific { | |
e0dd03ca KJH |
72 | const u8 req_complete_mask; |
73 | const u8 req_complete_val; | |
74 | const u8 req_canceled; | |
ad5ea3cc KJH |
75 | void __iomem *iobase; /* ioremapped address */ |
76 | unsigned long base; /* TPM base address */ | |
77 | ||
27084efe | 78 | int irq; |
a7b66822 | 79 | int probed_irq; |
27084efe | 80 | |
ad5ea3cc KJH |
81 | int region_size; |
82 | int have_region; | |
1da177e4 LT |
83 | |
84 | int (*recv) (struct tpm_chip *, u8 *, size_t); | |
85 | int (*send) (struct tpm_chip *, u8 *, size_t); | |
86 | void (*cancel) (struct tpm_chip *); | |
b4ed3e3c | 87 | u8 (*status) (struct tpm_chip *); |
5bd91f18 | 88 | void (*release) (struct device *); |
1da177e4 | 89 | struct miscdevice miscdev; |
6659ca2a | 90 | struct attribute_group *attr_group; |
27084efe LD |
91 | struct list_head list; |
92 | int locality; | |
36b20020 | 93 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
62592101 | 94 | bool timeout_adjusted; |
36b20020 | 95 | unsigned long duration[3]; /* jiffies */ |
04ab2293 | 96 | bool duration_adjusted; |
27084efe LD |
97 | |
98 | wait_queue_head_t read_queue; | |
99 | wait_queue_head_t int_queue; | |
1da177e4 LT |
100 | }; |
101 | ||
4e401fb0 SB |
102 | #define TPM_VID_INTEL 0x8086 |
103 | ||
1da177e4 | 104 | struct tpm_chip { |
e659a3fe | 105 | struct device *dev; /* Device stuff */ |
1da177e4 LT |
106 | |
107 | int dev_num; /* /dev/tpm# */ | |
dc36d32c | 108 | unsigned long is_open; /* only one allowed */ |
1da177e4 LT |
109 | int time_expired; |
110 | ||
111 | /* Data passed to and from the tpm via the read/write calls */ | |
112 | u8 *data_buffer; | |
113 | atomic_t data_pending; | |
d081d470 | 114 | struct mutex buffer_mutex; |
1da177e4 LT |
115 | |
116 | struct timer_list user_read_timer; /* user needs to claim result */ | |
09e12f9f | 117 | struct work_struct work; |
d081d470 | 118 | struct mutex tpm_mutex; /* tpm is processing */ |
1da177e4 | 119 | |
90dda520 | 120 | struct tpm_vendor_specific vendor; |
1da177e4 | 121 | |
55a82ab3 KJH |
122 | struct dentry **bios_dir; |
123 | ||
1da177e4 | 124 | struct list_head list; |
5bd91f18 | 125 | void (*release) (struct device *); |
1da177e4 LT |
126 | }; |
127 | ||
27084efe LD |
128 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
129 | ||
a0e39349 MZ |
130 | static inline void tpm_chip_put(struct tpm_chip *chip) |
131 | { | |
132 | module_put(chip->dev->driver->owner); | |
133 | } | |
134 | ||
daacdfa6 | 135 | static inline int tpm_read_index(int base, int index) |
1da177e4 | 136 | { |
daacdfa6 KJH |
137 | outb(index, base); |
138 | return inb(base+1) & 0xFF; | |
1da177e4 LT |
139 | } |
140 | ||
daacdfa6 | 141 | static inline void tpm_write_index(int base, int index, int value) |
1da177e4 | 142 | { |
daacdfa6 KJH |
143 | outb(index, base); |
144 | outb(value & 0xFF, base+1); | |
1da177e4 | 145 | } |
08837438 RA |
146 | struct tpm_input_header { |
147 | __be16 tag; | |
148 | __be32 length; | |
149 | __be32 ordinal; | |
150 | }__attribute__((packed)); | |
151 | ||
152 | struct tpm_output_header { | |
153 | __be16 tag; | |
154 | __be32 length; | |
155 | __be32 return_code; | |
156 | }__attribute__((packed)); | |
157 | ||
158 | struct stclear_flags_t { | |
159 | __be16 tag; | |
160 | u8 deactivated; | |
161 | u8 disableForceClear; | |
162 | u8 physicalPresence; | |
163 | u8 physicalPresenceLock; | |
164 | u8 bGlobalLock; | |
165 | }__attribute__((packed)); | |
166 | ||
167 | struct tpm_version_t { | |
168 | u8 Major; | |
169 | u8 Minor; | |
170 | u8 revMajor; | |
171 | u8 revMinor; | |
172 | }__attribute__((packed)); | |
173 | ||
174 | struct tpm_version_1_2_t { | |
175 | __be16 tag; | |
176 | u8 Major; | |
177 | u8 Minor; | |
178 | u8 revMajor; | |
179 | u8 revMinor; | |
180 | }__attribute__((packed)); | |
181 | ||
182 | struct timeout_t { | |
183 | __be32 a; | |
184 | __be32 b; | |
185 | __be32 c; | |
186 | __be32 d; | |
187 | }__attribute__((packed)); | |
188 | ||
189 | struct duration_t { | |
190 | __be32 tpm_short; | |
191 | __be32 tpm_medium; | |
192 | __be32 tpm_long; | |
193 | }__attribute__((packed)); | |
194 | ||
195 | struct permanent_flags_t { | |
196 | __be16 tag; | |
197 | u8 disable; | |
198 | u8 ownership; | |
199 | u8 deactivated; | |
200 | u8 readPubek; | |
201 | u8 disableOwnerClear; | |
202 | u8 allowMaintenance; | |
203 | u8 physicalPresenceLifetimeLock; | |
204 | u8 physicalPresenceHWEnable; | |
205 | u8 physicalPresenceCMDEnable; | |
206 | u8 CEKPUsed; | |
207 | u8 TPMpost; | |
208 | u8 TPMpostLock; | |
209 | u8 FIPS; | |
210 | u8 operator; | |
211 | u8 enableRevokeEK; | |
212 | u8 nvLocked; | |
213 | u8 readSRKPub; | |
214 | u8 tpmEstablished; | |
215 | u8 maintenanceDone; | |
216 | u8 disableFullDALogicInfo; | |
217 | }__attribute__((packed)); | |
218 | ||
219 | typedef union { | |
220 | struct permanent_flags_t perm_flags; | |
221 | struct stclear_flags_t stclear_flags; | |
222 | bool owned; | |
223 | __be32 num_pcrs; | |
224 | struct tpm_version_t tpm_version; | |
225 | struct tpm_version_1_2_t tpm_version_1_2; | |
226 | __be32 manufacturer_id; | |
227 | struct timeout_t timeout; | |
228 | struct duration_t duration; | |
229 | } cap_t; | |
230 | ||
231 | struct tpm_getcap_params_in { | |
232 | __be32 cap; | |
233 | __be32 subcap_size; | |
234 | __be32 subcap; | |
235 | }__attribute__((packed)); | |
236 | ||
237 | struct tpm_getcap_params_out { | |
238 | __be32 cap_size; | |
239 | cap_t cap; | |
240 | }__attribute__((packed)); | |
241 | ||
242 | struct tpm_readpubek_params_out { | |
243 | u8 algorithm[4]; | |
244 | u8 encscheme[2]; | |
245 | u8 sigscheme[2]; | |
02a077c5 | 246 | __be32 paramsize; |
08837438 RA |
247 | u8 parameters[12]; /*assuming RSA*/ |
248 | __be32 keysize; | |
249 | u8 modulus[256]; | |
250 | u8 checksum[20]; | |
251 | }__attribute__((packed)); | |
252 | ||
253 | typedef union { | |
254 | struct tpm_input_header in; | |
255 | struct tpm_output_header out; | |
256 | } tpm_cmd_header; | |
257 | ||
659aaf2b RA |
258 | #define TPM_DIGEST_SIZE 20 |
259 | struct tpm_pcrread_out { | |
260 | u8 pcr_result[TPM_DIGEST_SIZE]; | |
261 | }__attribute__((packed)); | |
262 | ||
263 | struct tpm_pcrread_in { | |
264 | __be32 pcr_idx; | |
265 | }__attribute__((packed)); | |
266 | ||
267 | struct tpm_pcrextend_in { | |
268 | __be32 pcr_idx; | |
269 | u8 hash[TPM_DIGEST_SIZE]; | |
270 | }__attribute__((packed)); | |
271 | ||
08837438 RA |
272 | typedef union { |
273 | struct tpm_getcap_params_out getcap_out; | |
274 | struct tpm_readpubek_params_out readpubek_out; | |
275 | u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; | |
276 | struct tpm_getcap_params_in getcap_in; | |
659aaf2b RA |
277 | struct tpm_pcrread_in pcrread_in; |
278 | struct tpm_pcrread_out pcrread_out; | |
279 | struct tpm_pcrextend_in pcrextend_in; | |
08837438 RA |
280 | } tpm_cmd_params; |
281 | ||
282 | struct tpm_cmd_t { | |
283 | tpm_cmd_header header; | |
284 | tpm_cmd_params params; | |
285 | }__attribute__((packed)); | |
286 | ||
287 | ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); | |
1da177e4 | 288 | |
2b30a90f | 289 | extern int tpm_get_timeouts(struct tpm_chip *); |
08e96e48 | 290 | extern void tpm_gen_interrupt(struct tpm_chip *); |
68d6e671 | 291 | extern int tpm_do_selftest(struct tpm_chip *); |
9e18ee19 | 292 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
e0dd03ca KJH |
293 | extern struct tpm_chip* tpm_register_hardware(struct device *, |
294 | const struct tpm_vendor_specific *); | |
1da177e4 LT |
295 | extern int tpm_open(struct inode *, struct file *); |
296 | extern int tpm_release(struct inode *, struct file *); | |
253115b7 | 297 | extern void tpm_dev_vendor_release(struct tpm_chip *); |
1da177e4 LT |
298 | extern ssize_t tpm_write(struct file *, const char __user *, size_t, |
299 | loff_t *); | |
300 | extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); | |
e659a3fe | 301 | extern void tpm_remove_hardware(struct device *); |
035e2ce8 | 302 | extern int tpm_pm_suspend(struct device *); |
ce2c87d4 | 303 | extern int tpm_pm_resume(struct device *); |
fd048866 RA |
304 | extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, |
305 | wait_queue_head_t *); | |
55a82ab3 KJH |
306 | #ifdef CONFIG_ACPI |
307 | extern struct dentry ** tpm_bios_log_setup(char *); | |
308 | extern void tpm_bios_log_teardown(struct dentry **); | |
309 | #else | |
bb53a761 | 310 | static inline struct dentry ** tpm_bios_log_setup(char *name) |
55a82ab3 KJH |
311 | { |
312 | return NULL; | |
313 | } | |
314 | static inline void tpm_bios_log_teardown(struct dentry **dir) | |
315 | { | |
316 | } | |
317 | #endif |