Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Kent Yoder | 8e81cc1 | 2007-08-22 14:01:04 -0700 | [diff] [blame] | 10 | * Maintained by: <tpmdd-devel@lists.sourceforge.net> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/delay.h> |
| 23 | #include <linux/fs.h> |
Matthias Kaehlcke | d081d47 | 2007-05-08 00:32:02 -0700 | [diff] [blame] | 24 | #include <linux/mutex.h> |
Al Viro | 914e263 | 2006-10-18 13:55:46 -0400 | [diff] [blame] | 25 | #include <linux/sched.h> |
Al Viro | bbc5b21 | 2005-11-01 15:14:05 +0000 | [diff] [blame] | 26 | #include <linux/platform_device.h> |
Andrew Morton | 276ad0c | 2006-03-25 03:07:35 -0800 | [diff] [blame] | 27 | #include <linux/io.h> |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 28 | #include <linux/tpm.h> |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 29 | #include <linux/acpi.h> |
Jarkko Sakkinen | 313d21e | 2014-12-12 11:46:37 -0800 | [diff] [blame^] | 30 | #include <linux/cdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 32 | enum tpm_const { |
| 33 | TPM_MINOR = 224, /* officially assigned */ |
| 34 | TPM_BUFSIZE = 4096, |
| 35 | TPM_NUM_DEVICES = 256, |
Duncan Laurie | 32d33b2 | 2013-03-17 14:56:39 -0700 | [diff] [blame] | 36 | TPM_RETRY = 50, /* 5 seconds */ |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 37 | }; |
| 38 | |
Kylene Hall | 3122a88 | 2005-06-23 22:01:48 -0700 | [diff] [blame] | 39 | enum tpm_timeout { |
| 40 | TPM_TIMEOUT = 5, /* msecs */ |
Duncan Laurie | 32d33b2 | 2013-03-17 14:56:39 -0700 | [diff] [blame] | 41 | TPM_TIMEOUT_RETRY = 100 /* msecs */ |
Kylene Hall | 3122a88 | 2005-06-23 22:01:48 -0700 | [diff] [blame] | 42 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | /* TPM addresses */ |
Kylene Hall | 3122a88 | 2005-06-23 22:01:48 -0700 | [diff] [blame] | 45 | enum tpm_addr { |
Kylene Jo Hall | daacdfa | 2005-06-25 14:55:39 -0700 | [diff] [blame] | 46 | TPM_SUPERIO_ADDR = 0x2E, |
Kylene Hall | 3122a88 | 2005-06-23 22:01:48 -0700 | [diff] [blame] | 47 | TPM_ADDR = 0x4E, |
Kylene Hall | 3122a88 | 2005-06-23 22:01:48 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
Jason Gunthorpe | 000a07b | 2013-11-26 13:30:41 -0700 | [diff] [blame] | 50 | /* Indexes the duration array */ |
| 51 | enum tpm_duration { |
| 52 | TPM_SHORT = 0, |
| 53 | TPM_MEDIUM = 1, |
| 54 | TPM_LONG = 2, |
| 55 | TPM_UNDEFINED, |
| 56 | }; |
| 57 | |
Duncan Laurie | 32d33b2 | 2013-03-17 14:56:39 -0700 | [diff] [blame] | 58 | #define TPM_WARN_RETRY 0x800 |
Stefan Berger | 68d6e67 | 2011-11-11 12:57:04 -0500 | [diff] [blame] | 59 | #define TPM_WARN_DOING_SELFTEST 0x802 |
Stefan Berger | be40541 | 2012-01-17 22:07:30 -0500 | [diff] [blame] | 60 | #define TPM_ERR_DEACTIVATED 0x6 |
| 61 | #define TPM_ERR_DISABLED 0x7 |
Jason Gunthorpe | c584af1 | 2012-11-21 13:54:33 -0700 | [diff] [blame] | 62 | #define TPM_ERR_INVALID_POSTINIT 38 |
Stefan Berger | be40541 | 2012-01-17 22:07:30 -0500 | [diff] [blame] | 63 | |
Rajiv Andrade | b9e3238 | 2011-11-01 17:00:52 -0200 | [diff] [blame] | 64 | #define TPM_HEADER_SIZE 10 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | struct tpm_chip; |
| 66 | |
| 67 | struct tpm_vendor_specific { |
Kylene Jo Hall | ad5ea3c | 2005-11-13 16:07:41 -0800 | [diff] [blame] | 68 | void __iomem *iobase; /* ioremapped address */ |
| 69 | unsigned long base; /* TPM base address */ |
| 70 | |
Leendert van Doorn | 27084ef | 2006-04-22 02:38:03 -0700 | [diff] [blame] | 71 | int irq; |
Stefan Berger | a7b6682 | 2011-03-30 12:13:32 -0400 | [diff] [blame] | 72 | int probed_irq; |
Leendert van Doorn | 27084ef | 2006-04-22 02:38:03 -0700 | [diff] [blame] | 73 | |
Kylene Jo Hall | ad5ea3c | 2005-11-13 16:07:41 -0800 | [diff] [blame] | 74 | int region_size; |
| 75 | int have_region; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Leendert van Doorn | 27084ef | 2006-04-22 02:38:03 -0700 | [diff] [blame] | 77 | struct list_head list; |
| 78 | int locality; |
Kylene Jo Hall | 36b2002 | 2006-04-22 02:38:19 -0700 | [diff] [blame] | 79 | unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ |
Stefan Berger | 6259210 | 2011-03-30 12:13:28 -0400 | [diff] [blame] | 80 | bool timeout_adjusted; |
Kylene Jo Hall | 36b2002 | 2006-04-22 02:38:19 -0700 | [diff] [blame] | 81 | unsigned long duration[3]; /* jiffies */ |
Stefan Berger | 04ab229 | 2011-03-30 12:13:25 -0400 | [diff] [blame] | 82 | bool duration_adjusted; |
Kent Yoder | 775585e | 2012-12-05 11:36:20 -0600 | [diff] [blame] | 83 | void *priv; |
Leendert van Doorn | 27084ef | 2006-04-22 02:38:03 -0700 | [diff] [blame] | 84 | |
| 85 | wait_queue_head_t read_queue; |
| 86 | wait_queue_head_t int_queue; |
Stefan Berger | 3e3a5e9 | 2013-01-22 13:50:07 -0600 | [diff] [blame] | 87 | |
| 88 | u16 manufacturer_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | }; |
| 90 | |
Kent Yoder | 775585e | 2012-12-05 11:36:20 -0600 | [diff] [blame] | 91 | #define TPM_VPRIV(c) (c)->vendor.priv |
| 92 | |
Stefan Berger | 4e401fb | 2012-01-20 12:58:49 -0500 | [diff] [blame] | 93 | #define TPM_VID_INTEL 0x8086 |
Stefan Berger | 1f86605 | 2013-01-22 13:52:35 -0600 | [diff] [blame] | 94 | #define TPM_VID_WINBOND 0x1050 |
| 95 | #define TPM_VID_STM 0x104A |
Stefan Berger | 4e401fb | 2012-01-20 12:58:49 -0500 | [diff] [blame] | 96 | |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 97 | #define TPM_PPI_VERSION_LEN 3 |
| 98 | |
Jarkko Sakkinen | afb5abc | 2014-12-12 11:46:34 -0800 | [diff] [blame] | 99 | enum tpm_chip_flags { |
| 100 | TPM_CHIP_FLAG_REGISTERED = BIT(0), |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 101 | TPM_CHIP_FLAG_PPI = BIT(1), |
Jarkko Sakkinen | afb5abc | 2014-12-12 11:46:34 -0800 | [diff] [blame] | 102 | }; |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | struct tpm_chip { |
Jarkko Sakkinen | 71ed848 | 2014-12-12 11:46:36 -0800 | [diff] [blame] | 105 | struct device *pdev; /* Device stuff */ |
Jarkko Sakkinen | 313d21e | 2014-12-12 11:46:37 -0800 | [diff] [blame^] | 106 | struct device dev; |
| 107 | struct cdev cdev; |
| 108 | |
Jason Gunthorpe | 5f82e9f | 2013-11-26 13:30:44 -0700 | [diff] [blame] | 109 | const struct tpm_class_ops *ops; |
Jarkko Sakkinen | afb5abc | 2014-12-12 11:46:34 -0800 | [diff] [blame] | 110 | unsigned int flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | int dev_num; /* /dev/tpm# */ |
Jason Gunthorpe | 6aff1fd | 2013-09-22 14:19:18 -0600 | [diff] [blame] | 113 | char devname[7]; |
Rajiv Andrade | dc36d32 | 2008-10-11 09:04:02 +1100 | [diff] [blame] | 114 | unsigned long is_open; /* only one allowed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | int time_expired; |
| 116 | |
Matthias Kaehlcke | d081d47 | 2007-05-08 00:32:02 -0700 | [diff] [blame] | 117 | struct mutex tpm_mutex; /* tpm is processing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Kylene Jo Hall | 90dda52 | 2006-04-22 02:37:15 -0700 | [diff] [blame] | 119 | struct tpm_vendor_specific vendor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Kylene Jo Hall | 55a82ab | 2006-01-08 01:03:15 -0800 | [diff] [blame] | 121 | struct dentry **bios_dir; |
| 122 | |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 123 | #ifdef CONFIG_ACPI |
| 124 | acpi_handle acpi_dev_handle; |
| 125 | char ppi_version[TPM_PPI_VERSION_LEN + 1]; |
| 126 | #endif /* CONFIG_ACPI */ |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | struct list_head list; |
| 129 | }; |
| 130 | |
Leendert van Doorn | 27084ef | 2006-04-22 02:38:03 -0700 | [diff] [blame] | 131 | #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) |
| 132 | |
Mimi Zohar | a0e3934 | 2010-11-23 17:50:32 -0500 | [diff] [blame] | 133 | static inline void tpm_chip_put(struct tpm_chip *chip) |
| 134 | { |
Jarkko Sakkinen | 71ed848 | 2014-12-12 11:46:36 -0800 | [diff] [blame] | 135 | module_put(chip->pdev->driver->owner); |
Mimi Zohar | a0e3934 | 2010-11-23 17:50:32 -0500 | [diff] [blame] | 136 | } |
| 137 | |
Kylene Jo Hall | daacdfa | 2005-06-25 14:55:39 -0700 | [diff] [blame] | 138 | static inline int tpm_read_index(int base, int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
Kylene Jo Hall | daacdfa | 2005-06-25 14:55:39 -0700 | [diff] [blame] | 140 | outb(index, base); |
| 141 | return inb(base+1) & 0xFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | |
Kylene Jo Hall | daacdfa | 2005-06-25 14:55:39 -0700 | [diff] [blame] | 144 | static inline void tpm_write_index(int base, int index, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | { |
Kylene Jo Hall | daacdfa | 2005-06-25 14:55:39 -0700 | [diff] [blame] | 146 | outb(index, base); |
| 147 | outb(value & 0xFF, base+1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | } |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 149 | struct tpm_input_header { |
| 150 | __be16 tag; |
| 151 | __be32 length; |
| 152 | __be32 ordinal; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 153 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 154 | |
| 155 | struct tpm_output_header { |
| 156 | __be16 tag; |
| 157 | __be32 length; |
| 158 | __be32 return_code; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 159 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 160 | |
Jason Gunthorpe | 000a07b | 2013-11-26 13:30:41 -0700 | [diff] [blame] | 161 | #define TPM_TAG_RQU_COMMAND cpu_to_be16(193) |
| 162 | |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 163 | struct stclear_flags_t { |
| 164 | __be16 tag; |
| 165 | u8 deactivated; |
| 166 | u8 disableForceClear; |
| 167 | u8 physicalPresence; |
| 168 | u8 physicalPresenceLock; |
| 169 | u8 bGlobalLock; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 170 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 171 | |
| 172 | struct tpm_version_t { |
| 173 | u8 Major; |
| 174 | u8 Minor; |
| 175 | u8 revMajor; |
| 176 | u8 revMinor; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 177 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 178 | |
| 179 | struct tpm_version_1_2_t { |
| 180 | __be16 tag; |
| 181 | u8 Major; |
| 182 | u8 Minor; |
| 183 | u8 revMajor; |
| 184 | u8 revMinor; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 185 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 186 | |
| 187 | struct timeout_t { |
| 188 | __be32 a; |
| 189 | __be32 b; |
| 190 | __be32 c; |
| 191 | __be32 d; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 192 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 193 | |
| 194 | struct duration_t { |
| 195 | __be32 tpm_short; |
| 196 | __be32 tpm_medium; |
| 197 | __be32 tpm_long; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 198 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 199 | |
| 200 | struct permanent_flags_t { |
| 201 | __be16 tag; |
| 202 | u8 disable; |
| 203 | u8 ownership; |
| 204 | u8 deactivated; |
| 205 | u8 readPubek; |
| 206 | u8 disableOwnerClear; |
| 207 | u8 allowMaintenance; |
| 208 | u8 physicalPresenceLifetimeLock; |
| 209 | u8 physicalPresenceHWEnable; |
| 210 | u8 physicalPresenceCMDEnable; |
| 211 | u8 CEKPUsed; |
| 212 | u8 TPMpost; |
| 213 | u8 TPMpostLock; |
| 214 | u8 FIPS; |
| 215 | u8 operator; |
| 216 | u8 enableRevokeEK; |
| 217 | u8 nvLocked; |
| 218 | u8 readSRKPub; |
| 219 | u8 tpmEstablished; |
| 220 | u8 maintenanceDone; |
| 221 | u8 disableFullDALogicInfo; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 222 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 223 | |
| 224 | typedef union { |
| 225 | struct permanent_flags_t perm_flags; |
| 226 | struct stclear_flags_t stclear_flags; |
| 227 | bool owned; |
| 228 | __be32 num_pcrs; |
| 229 | struct tpm_version_t tpm_version; |
| 230 | struct tpm_version_1_2_t tpm_version_1_2; |
| 231 | __be32 manufacturer_id; |
| 232 | struct timeout_t timeout; |
| 233 | struct duration_t duration; |
| 234 | } cap_t; |
| 235 | |
Jason Gunthorpe | 000a07b | 2013-11-26 13:30:41 -0700 | [diff] [blame] | 236 | enum tpm_capabilities { |
| 237 | TPM_CAP_FLAG = cpu_to_be32(4), |
| 238 | TPM_CAP_PROP = cpu_to_be32(5), |
| 239 | CAP_VERSION_1_1 = cpu_to_be32(0x06), |
| 240 | CAP_VERSION_1_2 = cpu_to_be32(0x1A) |
| 241 | }; |
| 242 | |
| 243 | enum tpm_sub_capabilities { |
| 244 | TPM_CAP_PROP_PCR = cpu_to_be32(0x101), |
| 245 | TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103), |
| 246 | TPM_CAP_FLAG_PERM = cpu_to_be32(0x108), |
| 247 | TPM_CAP_FLAG_VOL = cpu_to_be32(0x109), |
| 248 | TPM_CAP_PROP_OWNER = cpu_to_be32(0x111), |
| 249 | TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115), |
| 250 | TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120), |
| 251 | |
| 252 | }; |
| 253 | |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 254 | struct tpm_getcap_params_in { |
| 255 | __be32 cap; |
| 256 | __be32 subcap_size; |
| 257 | __be32 subcap; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 258 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 259 | |
| 260 | struct tpm_getcap_params_out { |
| 261 | __be32 cap_size; |
| 262 | cap_t cap; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 263 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 264 | |
| 265 | struct tpm_readpubek_params_out { |
| 266 | u8 algorithm[4]; |
| 267 | u8 encscheme[2]; |
| 268 | u8 sigscheme[2]; |
Rajiv Andrade | 02a077c | 2010-06-14 13:58:22 -0300 | [diff] [blame] | 269 | __be32 paramsize; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 270 | u8 parameters[12]; /*assuming RSA*/ |
| 271 | __be32 keysize; |
| 272 | u8 modulus[256]; |
| 273 | u8 checksum[20]; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 274 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 275 | |
| 276 | typedef union { |
| 277 | struct tpm_input_header in; |
| 278 | struct tpm_output_header out; |
| 279 | } tpm_cmd_header; |
| 280 | |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 281 | struct tpm_pcrread_out { |
| 282 | u8 pcr_result[TPM_DIGEST_SIZE]; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 283 | } __packed; |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 284 | |
| 285 | struct tpm_pcrread_in { |
| 286 | __be32 pcr_idx; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 287 | } __packed; |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 288 | |
| 289 | struct tpm_pcrextend_in { |
| 290 | __be32 pcr_idx; |
| 291 | u8 hash[TPM_DIGEST_SIZE]; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 292 | } __packed; |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 293 | |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 294 | /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18 |
| 295 | * bytes, but 128 is still a relatively large number of random bytes and |
| 296 | * anything much bigger causes users of struct tpm_cmd_t to start getting |
| 297 | * compiler warnings about stack frame size. */ |
| 298 | #define TPM_MAX_RNG_DATA 128 |
| 299 | |
| 300 | struct tpm_getrandom_out { |
| 301 | __be32 rng_data_len; |
| 302 | u8 rng_data[TPM_MAX_RNG_DATA]; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 303 | } __packed; |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 304 | |
| 305 | struct tpm_getrandom_in { |
| 306 | __be32 num_bytes; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 307 | } __packed; |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 308 | |
Jason Gunthorpe | c584af1 | 2012-11-21 13:54:33 -0700 | [diff] [blame] | 309 | struct tpm_startup_in { |
| 310 | __be16 startup_type; |
| 311 | } __packed; |
| 312 | |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 313 | typedef union { |
| 314 | struct tpm_getcap_params_out getcap_out; |
| 315 | struct tpm_readpubek_params_out readpubek_out; |
| 316 | u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; |
| 317 | struct tpm_getcap_params_in getcap_in; |
Rajiv Andrade | 659aaf2 | 2009-02-02 15:23:44 -0200 | [diff] [blame] | 318 | struct tpm_pcrread_in pcrread_in; |
| 319 | struct tpm_pcrread_out pcrread_out; |
| 320 | struct tpm_pcrextend_in pcrextend_in; |
Kent Yoder | 41ab999 | 2012-06-07 13:47:14 -0500 | [diff] [blame] | 321 | struct tpm_getrandom_in getrandom_in; |
| 322 | struct tpm_getrandom_out getrandom_out; |
Jason Gunthorpe | c584af1 | 2012-11-21 13:54:33 -0700 | [diff] [blame] | 323 | struct tpm_startup_in startup_in; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 324 | } tpm_cmd_params; |
| 325 | |
| 326 | struct tpm_cmd_t { |
| 327 | tpm_cmd_header header; |
| 328 | tpm_cmd_params params; |
Jason Gunthorpe | 348df8d | 2012-11-21 13:56:45 -0700 | [diff] [blame] | 329 | } __packed; |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 330 | |
Jarkko Sakkinen | 313d21e | 2014-12-12 11:46:37 -0800 | [diff] [blame^] | 331 | extern struct class *tpm_class; |
| 332 | extern dev_t tpm_devt; |
| 333 | extern const struct file_operations tpm_fops; |
| 334 | |
Rajiv Andrade | 0883743 | 2009-02-02 15:23:43 -0200 | [diff] [blame] | 335 | ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); |
Jason Gunthorpe | afdba32 | 2013-11-26 13:30:40 -0700 | [diff] [blame] | 336 | ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, |
| 337 | size_t bufsiz); |
Jarkko Sakkinen | 87155b7 | 2014-12-12 11:46:33 -0800 | [diff] [blame] | 338 | ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len, |
| 339 | const char *desc); |
Stefan Berger | 2b30a90 | 2011-11-11 12:57:02 -0500 | [diff] [blame] | 340 | extern int tpm_get_timeouts(struct tpm_chip *); |
Kylene Jo Hall | 08e96e4 | 2006-04-22 02:37:50 -0700 | [diff] [blame] | 341 | extern void tpm_gen_interrupt(struct tpm_chip *); |
Stefan Berger | 68d6e67 | 2011-11-11 12:57:04 -0500 | [diff] [blame] | 342 | extern int tpm_do_selftest(struct tpm_chip *); |
Kylene Jo Hall | 9e18ee1 | 2006-04-22 02:37:38 -0700 | [diff] [blame] | 343 | extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32); |
Rafael J. Wysocki | 035e2ce | 2012-07-06 19:09:01 +0200 | [diff] [blame] | 344 | extern int tpm_pm_suspend(struct device *); |
Kylene Jo Hall | ce2c87d | 2005-10-30 15:03:25 -0800 | [diff] [blame] | 345 | extern int tpm_pm_resume(struct device *); |
Rajiv Andrade | fd04886 | 2011-09-16 14:39:40 -0300 | [diff] [blame] | 346 | extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long, |
Stefan Berger | 78f09cc | 2013-01-22 13:57:53 -0600 | [diff] [blame] | 347 | wait_queue_head_t *, bool); |
Xiaoyan Zhang | f84fdff | 2012-08-22 18:47:22 +0800 | [diff] [blame] | 348 | |
Jarkko Sakkinen | afb5abc | 2014-12-12 11:46:34 -0800 | [diff] [blame] | 349 | struct tpm_chip *tpm_chip_find_get(int chip_num); |
| 350 | extern struct tpm_chip *tpmm_chip_alloc(struct device *dev, |
| 351 | const struct tpm_class_ops *ops); |
| 352 | extern int tpm_chip_register(struct tpm_chip *chip); |
| 353 | extern void tpm_chip_unregister(struct tpm_chip *chip); |
| 354 | |
Jason Gunthorpe | 1e3b73a | 2013-11-26 13:30:42 -0700 | [diff] [blame] | 355 | int tpm_sysfs_add_device(struct tpm_chip *chip); |
| 356 | void tpm_sysfs_del_device(struct tpm_chip *chip); |
Jason Gunthorpe | afdba32 | 2013-11-26 13:30:40 -0700 | [diff] [blame] | 357 | |
Jason Gunthorpe | 000a07b | 2013-11-26 13:30:41 -0700 | [diff] [blame] | 358 | int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); |
| 359 | |
Xiaoyan Zhang | f84fdff | 2012-08-22 18:47:22 +0800 | [diff] [blame] | 360 | #ifdef CONFIG_ACPI |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 361 | extern int tpm_add_ppi(struct tpm_chip *chip); |
| 362 | extern void tpm_remove_ppi(struct tpm_chip *chip); |
Xiaoyan Zhang | f84fdff | 2012-08-22 18:47:22 +0800 | [diff] [blame] | 363 | #else |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 364 | static inline int tpm_add_ppi(struct tpm_chip *chip) |
Xiaoyan Zhang | f84fdff | 2012-08-22 18:47:22 +0800 | [diff] [blame] | 365 | { |
| 366 | return 0; |
| 367 | } |
Gang Wei | 1631cfb | 2012-10-09 17:35:22 +0800 | [diff] [blame] | 368 | |
Jarkko Sakkinen | 0dc5536 | 2014-12-12 11:46:35 -0800 | [diff] [blame] | 369 | static inline void tpm_remove_ppi(struct tpm_chip *chip) |
Gang Wei | 1631cfb | 2012-10-09 17:35:22 +0800 | [diff] [blame] | 370 | { |
| 371 | } |
Xiaoyan Zhang | f84fdff | 2012-08-22 18:47:22 +0800 | [diff] [blame] | 372 | #endif |