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