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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 | /* * Copyright (C) 2004 IBM Corporation * * Authors: * Leendert van Doorn <leendert@watson.ibm.com> * Dave Safford <safford@watson.ibm.com> * Reiner Sailer <sailer@watson.ibm.com> * Kylene Hall <kjhall@us.ibm.com> * * Maintained by: <tpmdd-devel@lists.sourceforge.net> * * Device driver for TCG/TCPA TPM (trusted platform module). * Specifications at www.trustedcomputinggroup.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, version 2 of the * License. * */ #include <linux/module.h> #include <linux/delay.h> #include <linux/fs.h> #include <linux/mutex.h> #include <linux/sched.h> #include <linux/miscdevice.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/tpm.h> enum tpm_const { TPM_MINOR = 224, /* officially assigned */ TPM_BUFSIZE = 4096, TPM_NUM_DEVICES = 256, TPM_RETRY = 50, /* 5 seconds */ }; enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ TPM_TIMEOUT_RETRY = 100 /* msecs */ }; /* TPM addresses */ enum tpm_addr { TPM_SUPERIO_ADDR = 0x2E, TPM_ADDR = 0x4E, }; #define TPM_WARN_RETRY 0x800 #define TPM_WARN_DOING_SELFTEST 0x802 #define TPM_ERR_DEACTIVATED 0x6 #define TPM_ERR_DISABLED 0x7 #define TPM_ERR_INVALID_POSTINIT 38 #define TPM_HEADER_SIZE 10 extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, const char *, size_t); extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_temp_deactivated(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_durations(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_timeouts(struct device *, struct device_attribute *attr, char *); struct tpm_chip; struct tpm_vendor_specific { const u8 req_complete_mask; const u8 req_complete_val; bool (*req_canceled)(struct tpm_chip *chip, u8 status); void __iomem *iobase; /* ioremapped address */ unsigned long base; /* TPM base address */ int irq; int probed_irq; int region_size; int have_region; int (*recv) (struct tpm_chip *, u8 *, size_t); int (*send) (struct tpm_chip *, u8 *, size_t); void (*cancel) (struct tpm_chip *); u8 (*status) (struct tpm_chip *); bool (*update_timeouts)(struct tpm_chip *chip, unsigned long *timeout_cap); void (*release) (struct device *); struct miscdevice miscdev; struct attribute_group *attr_group; struct list_head list; int locality; unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ bool timeout_adjusted; unsigned long duration[3]; /* jiffies */ bool duration_adjusted; void *priv; wait_queue_head_t read_queue; wait_queue_head_t int_queue; u16 manufacturer_id; }; #define TPM_VPRIV(c) (c)->vendor.priv #define TPM_VID_INTEL 0x8086 #define TPM_VID_WINBOND 0x1050 #define TPM_VID_STM 0x104A struct tpm_chip { struct device *dev; /* Device stuff */ int dev_num; /* /dev/tpm# */ unsigned long is_open; /* only one allowed */ int time_expired; /* Data passed to and from the tpm via the read/write calls */ u8 *data_buffer; atomic_t data_pending; struct mutex buffer_mutex; struct timer_list user_read_timer; /* user needs to claim result */ struct work_struct work; struct mutex tpm_mutex; /* tpm is processing */ struct tpm_vendor_specific vendor; struct dentry **bios_dir; struct list_head list; void (*release) (struct device *); }; #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) static inline void tpm_chip_put(struct tpm_chip *chip) { module_put(chip->dev->driver->owner); } static inline int tpm_read_index(int base, int index) { outb(index, base); return inb(base+1) & 0xFF; } static inline void tpm_write_index(int base, int index, int value) { outb(index, base); outb(value & 0xFF, base+1); } struct tpm_input_header { __be16 tag; __be32 length; __be32 ordinal; } __packed; struct tpm_output_header { __be16 tag; __be32 length; __be32 return_code; } __packed; struct stclear_flags_t { __be16 tag; u8 deactivated; u8 disableForceClear; u8 physicalPresence; u8 physicalPresenceLock; u8 bGlobalLock; } __packed; struct tpm_version_t { u8 Major; u8 Minor; u8 revMajor; u8 revMinor; } __packed; struct tpm_version_1_2_t { __be16 tag; u8 Major; u8 Minor; u8 revMajor; u8 revMinor; } __packed; struct timeout_t { __be32 a; __be32 b; __be32 c; __be32 d; } __packed; struct duration_t { __be32 tpm_short; __be32 tpm_medium; __be32 tpm_long; } __packed; struct permanent_flags_t { __be16 tag; u8 disable; u8 ownership; u8 deactivated; u8 readPubek; u8 disableOwnerClear; u8 allowMaintenance; u8 physicalPresenceLifetimeLock; u8 physicalPresenceHWEnable; u8 physicalPresenceCMDEnable; u8 CEKPUsed; u8 TPMpost; u8 TPMpostLock; u8 FIPS; u8 operator; u8 enableRevokeEK; u8 nvLocked; u8 readSRKPub; u8 tpmEstablished; u8 maintenanceDone; u8 disableFullDALogicInfo; } __packed; typedef union { struct permanent_flags_t perm_flags; struct stclear_flags_t stclear_flags; bool owned; __be32 num_pcrs; struct tpm_version_t tpm_version; struct tpm_version_1_2_t tpm_version_1_2; __be32 manufacturer_id; struct timeout_t timeout; struct duration_t duration; } cap_t; struct tpm_getcap_params_in { __be32 cap; __be32 subcap_size; __be32 subcap; } __packed; struct tpm_getcap_params_out { __be32 cap_size; cap_t cap; } __packed; struct tpm_readpubek_params_out { u8 algorithm[4]; u8 encscheme[2]; u8 sigscheme[2]; __be32 paramsize; u8 parameters[12]; /*assuming RSA*/ __be32 keysize; u8 modulus[256]; u8 checksum[20]; } __packed; typedef union { struct tpm_input_header in; struct tpm_output_header out; } tpm_cmd_header; struct tpm_pcrread_out { u8 pcr_result[TPM_DIGEST_SIZE]; } __packed; struct tpm_pcrread_in { __be32 pcr_idx; } __packed; struct tpm_pcrextend_in { __be32 pcr_idx; u8 hash[TPM_DIGEST_SIZE]; } __packed; /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 * bytes, but 128 is still a relatively large number of random bytes and * anything much bigger causes users of struct tpm_cmd_t to start getting * compiler warnings about stack frame size. */ #define TPM_MAX_RNG_DATA 128 struct tpm_getrandom_out { __be32 rng_data_len; u8 rng_data[TPM_MAX_RNG_DATA]; } __packed; struct tpm_getrandom_in { __be32 num_bytes; } __packed; struct tpm_startup_in { __be16 startup_type; } __packed; typedef union { struct tpm_getcap_params_out getcap_out; struct tpm_readpubek_params_out readpubek_out; u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; struct tpm_getcap_params_in getcap_in; struct tpm_pcrread_in pcrread_in; struct tpm_pcrread_out pcrread_out; struct tpm_pcrextend_in pcrextend_in; struct tpm_getrandom_in getrandom_in; struct tpm_getrandom_out getrandom_out; struct tpm_startup_in startup_in; } tpm_cmd_params; struct tpm_cmd_t { tpm_cmd_header header; tpm_cmd_params params; } __packed; ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); extern int tpm_get_timeouts(struct tpm_chip *); extern void tpm_gen_interrupt(struct tpm_chip *); extern int tpm_do_selftest(struct tpm_chip *); extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); extern struct tpm_chip* tpm_register_hardware(struct device *, const struct tpm_vendor_specific *); extern int tpm_open(struct inode *, struct file *); extern int tpm_release(struct inode *, struct file *); extern void tpm_dev_release(struct device *dev); extern void tpm_dev_vendor_release(struct tpm_chip *); extern ssize_t tpm_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); extern void tpm_remove_hardware(struct device *); extern int tpm_pm_suspend(struct device *); extern int tpm_pm_resume(struct device *); extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, wait_queue_head_t *, bool); #ifdef CONFIG_ACPI extern int tpm_add_ppi(struct kobject *); extern void tpm_remove_ppi(struct kobject *); #else static inline int tpm_add_ppi(struct kobject *parent) { return 0; } static inline void tpm_remove_ppi(struct kobject *parent) { } #endif |