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17#ifndef __LINUX_TPM_H__
18#define __LINUX_TPM_H__
19
20#include <linux/hw_random.h>
21#include <linux/acpi.h>
22#include <linux/cdev.h>
23#include <linux/fs.h>
24#include <linux/highmem.h>
25#include <crypto/hash_info.h>
26
27#define TPM_DIGEST_SIZE 20
28#define TPM_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE
29
30struct tpm_chip;
31struct trusted_key_payload;
32struct trusted_key_options;
33
34
35enum tpm_algorithms {
36 TPM_ALG_ERROR = 0x0000,
37 TPM_ALG_SHA1 = 0x0004,
38 TPM_ALG_KEYEDHASH = 0x0008,
39 TPM_ALG_SHA256 = 0x000B,
40 TPM_ALG_SHA384 = 0x000C,
41 TPM_ALG_SHA512 = 0x000D,
42 TPM_ALG_NULL = 0x0010,
43 TPM_ALG_SM3_256 = 0x0012,
44};
45
46
47
48
49
50#define TPM_MAX_HASHES 5
51
52struct tpm_digest {
53 u16 alg_id;
54 u8 digest[TPM_MAX_DIGEST_SIZE];
55} __packed;
56
57struct tpm_bank_info {
58 u16 alg_id;
59 u16 digest_size;
60 u16 crypto_id;
61};
62
63enum TPM_OPS_FLAGS {
64 TPM_OPS_AUTO_STARTUP = BIT(0),
65};
66
67struct tpm_class_ops {
68 unsigned int flags;
69 const u8 req_complete_mask;
70 const u8 req_complete_val;
71 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
72 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
73 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
74 void (*cancel) (struct tpm_chip *chip);
75 u8 (*status) (struct tpm_chip *chip);
76 void (*update_timeouts)(struct tpm_chip *chip,
77 unsigned long *timeout_cap);
78 void (*update_durations)(struct tpm_chip *chip,
79 unsigned long *duration_cap);
80 int (*go_idle)(struct tpm_chip *chip);
81 int (*cmd_ready)(struct tpm_chip *chip);
82 int (*request_locality)(struct tpm_chip *chip, int loc);
83 int (*relinquish_locality)(struct tpm_chip *chip, int loc);
84 void (*clk_enable)(struct tpm_chip *chip, bool value);
85};
86
87#define TPM_NUM_EVENT_LOG_FILES 3
88
89
90enum tpm_duration {
91 TPM_SHORT = 0,
92 TPM_MEDIUM = 1,
93 TPM_LONG = 2,
94 TPM_LONG_LONG = 3,
95 TPM_UNDEFINED,
96 TPM_NUM_DURATIONS = TPM_UNDEFINED,
97};
98
99#define TPM_PPI_VERSION_LEN 3
100
101struct tpm_space {
102 u32 context_tbl[3];
103 u8 *context_buf;
104 u32 session_tbl[3];
105 u8 *session_buf;
106 u32 buf_size;
107};
108
109struct tpm_bios_log {
110 void *bios_event_log;
111 void *bios_event_log_end;
112};
113
114struct tpm_chip_seqops {
115 struct tpm_chip *chip;
116 const struct seq_operations *seqops;
117};
118
119struct tpm_chip {
120 struct device dev;
121 struct device devs;
122 struct cdev cdev;
123 struct cdev cdevs;
124
125
126
127
128
129 struct rw_semaphore ops_sem;
130 const struct tpm_class_ops *ops;
131
132 struct tpm_bios_log log;
133 struct tpm_chip_seqops bin_log_seqops;
134 struct tpm_chip_seqops ascii_log_seqops;
135
136 unsigned int flags;
137
138 int dev_num;
139 unsigned long is_open;
140
141 char hwrng_name[64];
142 struct hwrng hwrng;
143
144 struct mutex tpm_mutex;
145
146 unsigned long timeout_a;
147 unsigned long timeout_b;
148 unsigned long timeout_c;
149 unsigned long timeout_d;
150 bool timeout_adjusted;
151 unsigned long duration[TPM_NUM_DURATIONS];
152 bool duration_adjusted;
153
154 struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
155
156 const struct attribute_group *groups[3 + TPM_MAX_HASHES];
157 unsigned int groups_cnt;
158
159 u32 nr_allocated_banks;
160 struct tpm_bank_info *allocated_banks;
161#ifdef CONFIG_ACPI
162 acpi_handle acpi_dev_handle;
163 char ppi_version[TPM_PPI_VERSION_LEN + 1];
164#endif
165
166 struct tpm_space work_space;
167 u32 last_cc;
168 u32 nr_commands;
169 u32 *cc_attrs_tbl;
170
171
172 int locality;
173};
174
175#define TPM_HEADER_SIZE 10
176
177enum tpm2_const {
178 TPM2_PLATFORM_PCR = 24,
179 TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
180};
181
182enum tpm2_timeouts {
183 TPM2_TIMEOUT_A = 750,
184 TPM2_TIMEOUT_B = 2000,
185 TPM2_TIMEOUT_C = 200,
186 TPM2_TIMEOUT_D = 30,
187 TPM2_DURATION_SHORT = 20,
188 TPM2_DURATION_MEDIUM = 750,
189 TPM2_DURATION_LONG = 2000,
190 TPM2_DURATION_LONG_LONG = 300000,
191 TPM2_DURATION_DEFAULT = 120000,
192};
193
194enum tpm2_structures {
195 TPM2_ST_NO_SESSIONS = 0x8001,
196 TPM2_ST_SESSIONS = 0x8002,
197};
198
199
200#define TSS2_RC_LAYER_SHIFT 16
201#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT)
202
203enum tpm2_return_codes {
204 TPM2_RC_SUCCESS = 0x0000,
205 TPM2_RC_HASH = 0x0083,
206 TPM2_RC_HANDLE = 0x008B,
207 TPM2_RC_INITIALIZE = 0x0100,
208 TPM2_RC_FAILURE = 0x0101,
209 TPM2_RC_DISABLED = 0x0120,
210 TPM2_RC_COMMAND_CODE = 0x0143,
211 TPM2_RC_TESTING = 0x090A,
212 TPM2_RC_REFERENCE_H0 = 0x0910,
213 TPM2_RC_RETRY = 0x0922,
214};
215
216enum tpm2_command_codes {
217 TPM2_CC_FIRST = 0x011F,
218 TPM2_CC_HIERARCHY_CONTROL = 0x0121,
219 TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129,
220 TPM2_CC_CREATE_PRIMARY = 0x0131,
221 TPM2_CC_SEQUENCE_COMPLETE = 0x013E,
222 TPM2_CC_SELF_TEST = 0x0143,
223 TPM2_CC_STARTUP = 0x0144,
224 TPM2_CC_SHUTDOWN = 0x0145,
225 TPM2_CC_NV_READ = 0x014E,
226 TPM2_CC_CREATE = 0x0153,
227 TPM2_CC_LOAD = 0x0157,
228 TPM2_CC_SEQUENCE_UPDATE = 0x015C,
229 TPM2_CC_UNSEAL = 0x015E,
230 TPM2_CC_CONTEXT_LOAD = 0x0161,
231 TPM2_CC_CONTEXT_SAVE = 0x0162,
232 TPM2_CC_FLUSH_CONTEXT = 0x0165,
233 TPM2_CC_VERIFY_SIGNATURE = 0x0177,
234 TPM2_CC_GET_CAPABILITY = 0x017A,
235 TPM2_CC_GET_RANDOM = 0x017B,
236 TPM2_CC_PCR_READ = 0x017E,
237 TPM2_CC_PCR_EXTEND = 0x0182,
238 TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185,
239 TPM2_CC_HASH_SEQUENCE_START = 0x0186,
240 TPM2_CC_CREATE_LOADED = 0x0191,
241 TPM2_CC_LAST = 0x0193,
242};
243
244enum tpm2_permanent_handles {
245 TPM2_RS_PW = 0x40000009,
246};
247
248enum tpm2_capabilities {
249 TPM2_CAP_HANDLES = 1,
250 TPM2_CAP_COMMANDS = 2,
251 TPM2_CAP_PCRS = 5,
252 TPM2_CAP_TPM_PROPERTIES = 6,
253};
254
255enum tpm2_properties {
256 TPM_PT_TOTAL_COMMANDS = 0x0129,
257};
258
259enum tpm2_startup_types {
260 TPM2_SU_CLEAR = 0x0000,
261 TPM2_SU_STATE = 0x0001,
262};
263
264enum tpm2_cc_attrs {
265 TPM2_CC_ATTR_CHANDLES = 25,
266 TPM2_CC_ATTR_RHANDLE = 28,
267};
268
269#define TPM_VID_INTEL 0x8086
270#define TPM_VID_WINBOND 0x1050
271#define TPM_VID_STM 0x104A
272
273enum tpm_chip_flags {
274 TPM_CHIP_FLAG_TPM2 = BIT(1),
275 TPM_CHIP_FLAG_IRQ = BIT(2),
276 TPM_CHIP_FLAG_VIRTUAL = BIT(3),
277 TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
278 TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
279 TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED = BIT(6),
280};
281
282#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
283
284struct tpm_header {
285 __be16 tag;
286 __be32 length;
287 union {
288 __be32 ordinal;
289 __be32 return_code;
290 };
291} __packed;
292
293
294
295
296
297
298enum tpm_buf_flags {
299 TPM_BUF_OVERFLOW = BIT(0),
300};
301
302struct tpm_buf {
303 unsigned int flags;
304 u8 *data;
305};
306
307enum tpm2_object_attributes {
308 TPM2_OA_FIXED_TPM = BIT(1),
309 TPM2_OA_FIXED_PARENT = BIT(4),
310 TPM2_OA_USER_WITH_AUTH = BIT(6),
311};
312
313enum tpm2_session_attributes {
314 TPM2_SA_CONTINUE_SESSION = BIT(0),
315};
316
317struct tpm2_hash {
318 unsigned int crypto_id;
319 unsigned int tpm_id;
320};
321
322static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal)
323{
324 struct tpm_header *head = (struct tpm_header *)buf->data;
325
326 head->tag = cpu_to_be16(tag);
327 head->length = cpu_to_be32(sizeof(*head));
328 head->ordinal = cpu_to_be32(ordinal);
329}
330
331static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
332{
333 buf->data = (u8 *)__get_free_page(GFP_KERNEL);
334 if (!buf->data)
335 return -ENOMEM;
336
337 buf->flags = 0;
338 tpm_buf_reset(buf, tag, ordinal);
339 return 0;
340}
341
342static inline void tpm_buf_destroy(struct tpm_buf *buf)
343{
344 free_page((unsigned long)buf->data);
345}
346
347static inline u32 tpm_buf_length(struct tpm_buf *buf)
348{
349 struct tpm_header *head = (struct tpm_header *)buf->data;
350
351 return be32_to_cpu(head->length);
352}
353
354static inline u16 tpm_buf_tag(struct tpm_buf *buf)
355{
356 struct tpm_header *head = (struct tpm_header *)buf->data;
357
358 return be16_to_cpu(head->tag);
359}
360
361static inline void tpm_buf_append(struct tpm_buf *buf,
362 const unsigned char *new_data,
363 unsigned int new_len)
364{
365 struct tpm_header *head = (struct tpm_header *)buf->data;
366 u32 len = tpm_buf_length(buf);
367
368
369 if (buf->flags & TPM_BUF_OVERFLOW)
370 return;
371
372 if ((len + new_len) > PAGE_SIZE) {
373 WARN(1, "tpm_buf: overflow\n");
374 buf->flags |= TPM_BUF_OVERFLOW;
375 return;
376 }
377
378 memcpy(&buf->data[len], new_data, new_len);
379 head->length = cpu_to_be32(len + new_len);
380}
381
382static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
383{
384 tpm_buf_append(buf, &value, 1);
385}
386
387static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
388{
389 __be16 value2 = cpu_to_be16(value);
390
391 tpm_buf_append(buf, (u8 *) &value2, 2);
392}
393
394static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
395{
396 __be32 value2 = cpu_to_be32(value);
397
398 tpm_buf_append(buf, (u8 *) &value2, 4);
399}
400
401static inline u32 tpm2_rc_value(u32 rc)
402{
403 return (rc & BIT(7)) ? rc & 0xff : rc;
404}
405
406#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
407
408extern int tpm_is_tpm2(struct tpm_chip *chip);
409extern __must_check int tpm_try_get_ops(struct tpm_chip *chip);
410extern void tpm_put_ops(struct tpm_chip *chip);
411extern ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,
412 size_t min_rsp_body_length, const char *desc);
413extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
414 struct tpm_digest *digest);
415extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
416 struct tpm_digest *digests);
417extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
418extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
419extern struct tpm_chip *tpm_default_chip(void);
420void tpm2_flush_context(struct tpm_chip *chip, u32 handle);
421#else
422static inline int tpm_is_tpm2(struct tpm_chip *chip)
423{
424 return -ENODEV;
425}
426static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx,
427 struct tpm_digest *digest)
428{
429 return -ENODEV;
430}
431
432static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
433 struct tpm_digest *digests)
434{
435 return -ENODEV;
436}
437
438static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
439{
440 return -ENODEV;
441}
442static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
443{
444 return -ENODEV;
445}
446
447static inline struct tpm_chip *tpm_default_chip(void)
448{
449 return NULL;
450}
451#endif
452#endif
453
