1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2004 IBM Corporation 4 * Copyright (C) 2015 Intel Corporation 5 * 6 * Authors: 7 * Leendert van Doorn <leendert@watson.ibm.com> 8 * Dave Safford <safford@watson.ibm.com> 9 * Reiner Sailer <sailer@watson.ibm.com> 10 * Kylene Hall <kjhall@us.ibm.com> 11 * 12 * Maintained by: <tpmdd-devel@lists.sourceforge.net> 13 * 14 * Device driver for TCG/TCPA TPM (trusted platform module). 15 * Specifications at www.trustedcomputinggroup.org 16 */ 17 18 #ifndef __TPM_H__ 19 #define __TPM_H__ 20 21 #include <linux/module.h> 22 #include <linux/delay.h> 23 #include <linux/mutex.h> 24 #include <linux/sched.h> 25 #include <linux/platform_device.h> 26 #include <linux/io.h> 27 #include <linux/tpm.h> 28 #include <linux/tpm_eventlog.h> 29 30 #ifdef CONFIG_X86 31 #include <asm/intel-family.h> 32 #endif 33 34 #define TPM_MINOR 224 /* officially assigned */ 35 #define TPM_BUFSIZE 4096 36 #define TPM_NUM_DEVICES 65536 37 #define TPM_RETRY 50 38 39 enum tpm_timeout { 40 TPM_TIMEOUT = 5, /* msecs */ 41 TPM_TIMEOUT_RETRY = 100, /* msecs */ 42 TPM_TIMEOUT_RANGE_US = 300, /* usecs */ 43 TPM_TIMEOUT_POLL = 1, /* msecs */ 44 TPM_TIMEOUT_USECS_MIN = 100, /* usecs */ 45 TPM_TIMEOUT_USECS_MAX = 500 /* usecs */ 46 }; 47 48 /* TPM addresses */ 49 enum tpm_addr { 50 TPM_SUPERIO_ADDR = 0x2E, 51 TPM_ADDR = 0x4E, 52 }; 53 54 #define TPM_WARN_RETRY 0x800 55 #define TPM_WARN_DOING_SELFTEST 0x802 56 #define TPM_ERR_DEACTIVATED 0x6 57 #define TPM_ERR_DISABLED 0x7 58 #define TPM_ERR_FAILEDSELFTEST 0x1C 59 #define TPM_ERR_INVALID_POSTINIT 38 60 61 #define TPM_TAG_RQU_COMMAND 193 62 63 /* TPM2 specific constants. */ 64 #define TPM2_SPACE_BUFFER_SIZE 16384 /* 16 kB */ 65 66 struct stclear_flags_t { 67 __be16 tag; 68 u8 deactivated; 69 u8 disableForceClear; 70 u8 physicalPresence; 71 u8 physicalPresenceLock; 72 u8 bGlobalLock; 73 } __packed; 74 75 struct tpm1_version { 76 u8 major; 77 u8 minor; 78 u8 rev_major; 79 u8 rev_minor; 80 } __packed; 81 82 struct tpm1_version2 { 83 __be16 tag; 84 struct tpm1_version version; 85 } __packed; 86 87 struct timeout_t { 88 __be32 a; 89 __be32 b; 90 __be32 c; 91 __be32 d; 92 } __packed; 93 94 struct duration_t { 95 __be32 tpm_short; 96 __be32 tpm_medium; 97 __be32 tpm_long; 98 } __packed; 99 100 struct permanent_flags_t { 101 __be16 tag; 102 u8 disable; 103 u8 ownership; 104 u8 deactivated; 105 u8 readPubek; 106 u8 disableOwnerClear; 107 u8 allowMaintenance; 108 u8 physicalPresenceLifetimeLock; 109 u8 physicalPresenceHWEnable; 110 u8 physicalPresenceCMDEnable; 111 u8 CEKPUsed; 112 u8 TPMpost; 113 u8 TPMpostLock; 114 u8 FIPS; 115 u8 operator; 116 u8 enableRevokeEK; 117 u8 nvLocked; 118 u8 readSRKPub; 119 u8 tpmEstablished; 120 u8 maintenanceDone; 121 u8 disableFullDALogicInfo; 122 } __packed; 123 124 typedef union { 125 struct permanent_flags_t perm_flags; 126 struct stclear_flags_t stclear_flags; 127 __u8 owned; 128 __be32 num_pcrs; 129 struct tpm1_version version1; 130 struct tpm1_version2 version2; 131 __be32 manufacturer_id; 132 struct timeout_t timeout; 133 struct duration_t duration; 134 } cap_t; 135 136 enum tpm_capabilities { 137 TPM_CAP_FLAG = 4, 138 TPM_CAP_PROP = 5, 139 TPM_CAP_VERSION_1_1 = 0x06, 140 TPM_CAP_VERSION_1_2 = 0x1A, 141 }; 142 143 enum tpm_sub_capabilities { 144 TPM_CAP_PROP_PCR = 0x101, 145 TPM_CAP_PROP_MANUFACTURER = 0x103, 146 TPM_CAP_FLAG_PERM = 0x108, 147 TPM_CAP_FLAG_VOL = 0x109, 148 TPM_CAP_PROP_OWNER = 0x111, 149 TPM_CAP_PROP_TIS_TIMEOUT = 0x115, 150 TPM_CAP_PROP_TIS_DURATION = 0x120, 151 }; 152 153 enum tpm2_pt_props { 154 TPM2_PT_NONE = 0x00000000, 155 TPM2_PT_GROUP = 0x00000100, 156 TPM2_PT_FIXED = TPM2_PT_GROUP * 1, 157 TPM2_PT_FAMILY_INDICATOR = TPM2_PT_FIXED + 0, 158 TPM2_PT_LEVEL = TPM2_PT_FIXED + 1, 159 TPM2_PT_REVISION = TPM2_PT_FIXED + 2, 160 TPM2_PT_DAY_OF_YEAR = TPM2_PT_FIXED + 3, 161 TPM2_PT_YEAR = TPM2_PT_FIXED + 4, 162 TPM2_PT_MANUFACTURER = TPM2_PT_FIXED + 5, 163 TPM2_PT_VENDOR_STRING_1 = TPM2_PT_FIXED + 6, 164 TPM2_PT_VENDOR_STRING_2 = TPM2_PT_FIXED + 7, 165 TPM2_PT_VENDOR_STRING_3 = TPM2_PT_FIXED + 8, 166 TPM2_PT_VENDOR_STRING_4 = TPM2_PT_FIXED + 9, 167 TPM2_PT_VENDOR_TPM_TYPE = TPM2_PT_FIXED + 10, 168 TPM2_PT_FIRMWARE_VERSION_1 = TPM2_PT_FIXED + 11, 169 TPM2_PT_FIRMWARE_VERSION_2 = TPM2_PT_FIXED + 12, 170 TPM2_PT_INPUT_BUFFER = TPM2_PT_FIXED + 13, 171 TPM2_PT_HR_TRANSIENT_MIN = TPM2_PT_FIXED + 14, 172 TPM2_PT_HR_PERSISTENT_MIN = TPM2_PT_FIXED + 15, 173 TPM2_PT_HR_LOADED_MIN = TPM2_PT_FIXED + 16, 174 TPM2_PT_ACTIVE_SESSIONS_MAX = TPM2_PT_FIXED + 17, 175 TPM2_PT_PCR_COUNT = TPM2_PT_FIXED + 18, 176 TPM2_PT_PCR_SELECT_MIN = TPM2_PT_FIXED + 19, 177 TPM2_PT_CONTEXT_GAP_MAX = TPM2_PT_FIXED + 20, 178 TPM2_PT_NV_COUNTERS_MAX = TPM2_PT_FIXED + 22, 179 TPM2_PT_NV_INDEX_MAX = TPM2_PT_FIXED + 23, 180 TPM2_PT_MEMORY = TPM2_PT_FIXED + 24, 181 TPM2_PT_CLOCK_UPDATE = TPM2_PT_FIXED + 25, 182 TPM2_PT_CONTEXT_HASH = TPM2_PT_FIXED + 26, 183 TPM2_PT_CONTEXT_SYM = TPM2_PT_FIXED + 27, 184 TPM2_PT_CONTEXT_SYM_SIZE = TPM2_PT_FIXED + 28, 185 TPM2_PT_ORDERLY_COUNT = TPM2_PT_FIXED + 29, 186 TPM2_PT_MAX_COMMAND_SIZE = TPM2_PT_FIXED + 30, 187 TPM2_PT_MAX_RESPONSE_SIZE = TPM2_PT_FIXED + 31, 188 TPM2_PT_MAX_DIGEST = TPM2_PT_FIXED + 32, 189 TPM2_PT_MAX_OBJECT_CONTEXT = TPM2_PT_FIXED + 33, 190 TPM2_PT_MAX_SESSION_CONTEXT = TPM2_PT_FIXED + 34, 191 TPM2_PT_PS_FAMILY_INDICATOR = TPM2_PT_FIXED + 35, 192 TPM2_PT_PS_LEVEL = TPM2_PT_FIXED + 36, 193 TPM2_PT_PS_REVISION = TPM2_PT_FIXED + 37, 194 TPM2_PT_PS_DAY_OF_YEAR = TPM2_PT_FIXED + 38, 195 TPM2_PT_PS_YEAR = TPM2_PT_FIXED + 39, 196 TPM2_PT_SPLIT_MAX = TPM2_PT_FIXED + 40, 197 TPM2_PT_TOTAL_COMMANDS = TPM2_PT_FIXED + 41, 198 TPM2_PT_LIBRARY_COMMANDS = TPM2_PT_FIXED + 42, 199 TPM2_PT_VENDOR_COMMANDS = TPM2_PT_FIXED + 43, 200 TPM2_PT_NV_BUFFER_MAX = TPM2_PT_FIXED + 44, 201 TPM2_PT_MODES = TPM2_PT_FIXED + 45, 202 TPM2_PT_MAX_CAP_BUFFER = TPM2_PT_FIXED + 46, 203 TPM2_PT_VAR = TPM2_PT_GROUP * 2, 204 TPM2_PT_PERMANENT = TPM2_PT_VAR + 0, 205 TPM2_PT_STARTUP_CLEAR = TPM2_PT_VAR + 1, 206 TPM2_PT_HR_NV_INDEX = TPM2_PT_VAR + 2, 207 TPM2_PT_HR_LOADED = TPM2_PT_VAR + 3, 208 TPM2_PT_HR_LOADED_AVAIL = TPM2_PT_VAR + 4, 209 TPM2_PT_HR_ACTIVE = TPM2_PT_VAR + 5, 210 TPM2_PT_HR_ACTIVE_AVAIL = TPM2_PT_VAR + 6, 211 TPM2_PT_HR_TRANSIENT_AVAIL = TPM2_PT_VAR + 7, 212 TPM2_PT_HR_PERSISTENT = TPM2_PT_VAR + 8, 213 TPM2_PT_HR_PERSISTENT_AVAIL = TPM2_PT_VAR + 9, 214 TPM2_PT_NV_COUNTERS = TPM2_PT_VAR + 10, 215 TPM2_PT_NV_COUNTERS_AVAIL = TPM2_PT_VAR + 11, 216 TPM2_PT_ALGORITHM_SET = TPM2_PT_VAR + 12, 217 TPM2_PT_LOADED_CURVES = TPM2_PT_VAR + 13, 218 TPM2_PT_LOCKOUT_COUNTER = TPM2_PT_VAR + 14, 219 TPM2_PT_MAX_AUTH_FAIL = TPM2_PT_VAR + 15, 220 TPM2_PT_LOCKOUT_INTERVAL = TPM2_PT_VAR + 16, 221 TPM2_PT_LOCKOUT_RECOVERY = TPM2_PT_VAR + 17, 222 TPM2_PT_NV_WRITE_RECOVERY = TPM2_PT_VAR + 18, 223 TPM2_PT_AUDIT_COUNTER_0 = TPM2_PT_VAR + 19, 224 TPM2_PT_AUDIT_COUNTER_1 = TPM2_PT_VAR + 20, 225 }; 226 227 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 228 * bytes, but 128 is still a relatively large number of random bytes and 229 * anything much bigger causes users of struct tpm_cmd_t to start getting 230 * compiler warnings about stack frame size. */ 231 #define TPM_MAX_RNG_DATA 128 232 233 extern const struct class tpm_class; 234 extern const struct class tpmrm_class; 235 extern dev_t tpm_devt; 236 extern const struct file_operations tpm_fops; 237 extern const struct file_operations tpmrm_fops; 238 extern struct idr dev_nums_idr; 239 240 ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz); 241 int tpm_get_timeouts(struct tpm_chip *); 242 int tpm_auto_startup(struct tpm_chip *chip); 243 244 int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr); 245 int tpm1_auto_startup(struct tpm_chip *chip); 246 int tpm1_do_selftest(struct tpm_chip *chip); 247 int tpm1_get_timeouts(struct tpm_chip *chip); 248 unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal); 249 int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash, 250 const char *log_msg); 251 int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf); 252 ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap, 253 const char *desc, size_t min_cap_length); 254 int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max); 255 int tpm1_get_pcr_allocation(struct tpm_chip *chip); 256 unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal); 257 int tpm_pm_suspend(struct device *dev); 258 int tpm_pm_resume(struct device *dev); 259 int tpm_class_shutdown(struct device *dev); 260 tpm_msleep(unsigned int delay_msec)261 static inline void tpm_msleep(unsigned int delay_msec) 262 { 263 usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US, 264 delay_msec * 1000); 265 }; 266 267 int tpm_chip_bootstrap(struct tpm_chip *chip); 268 int tpm_chip_start(struct tpm_chip *chip); 269 void tpm_chip_stop(struct tpm_chip *chip); 270 struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip); 271 272 struct tpm_chip *tpm_chip_alloc(struct device *dev, 273 const struct tpm_class_ops *ops); 274 struct tpm_chip *tpmm_chip_alloc(struct device *pdev, 275 const struct tpm_class_ops *ops); 276 int tpm_chip_register(struct tpm_chip *chip); 277 void tpm_chip_unregister(struct tpm_chip *chip); 278 279 void tpm_sysfs_add_device(struct tpm_chip *chip); 280 281 282 #ifdef CONFIG_ACPI 283 extern void tpm_add_ppi(struct tpm_chip *chip); 284 #else tpm_add_ppi(struct tpm_chip * chip)285 static inline void tpm_add_ppi(struct tpm_chip *chip) 286 { 287 } 288 #endif 289 290 int tpm2_get_timeouts(struct tpm_chip *chip); 291 int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, 292 struct tpm_digest *digest, u16 *digest_size_ptr); 293 int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, 294 struct tpm_digest *digests); 295 int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); 296 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, 297 u32 *value, const char *desc); 298 299 ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip); 300 int tpm2_auto_startup(struct tpm_chip *chip); 301 void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type); 302 unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal); 303 int tpm2_probe(struct tpm_chip *chip); 304 int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip); 305 int tpm2_find_cc(struct tpm_chip *chip, u32 cc); 306 int tpm2_init_space(struct tpm_space *space, unsigned int buf_size); 307 void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space); 308 void tpm2_flush_space(struct tpm_chip *chip); 309 int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd, 310 size_t cmdsiz); 311 int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf, 312 size_t *bufsiz); 313 int tpm_devs_add(struct tpm_chip *chip); 314 void tpm_devs_remove(struct tpm_chip *chip); 315 316 void tpm_bios_log_setup(struct tpm_chip *chip); 317 void tpm_bios_log_teardown(struct tpm_chip *chip); 318 int tpm_dev_common_init(void); 319 void tpm_dev_common_exit(void); 320 #endif 321