[mirror_ubuntu-zesty-kernel.git] / drivers / char / tpm / tpm.h

/*
 * Copyright (C) 2004 IBM Corporation
 * Copyright (C) 2015 Intel 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/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
#include <linux/acpi.h>
#include <linux/cdev.h>
#include <linux/highmem.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,
};

/* Indexes the duration array */
enum tpm_duration {
	TPM_SHORT = 0,
	TPM_MEDIUM = 1,
	TPM_LONG = 2,
	TPM_UNDEFINED,
};

#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

enum tpm2_const {
	TPM2_PLATFORM_PCR	= 24,
	TPM2_PCR_SELECT_MIN	= ((TPM2_PLATFORM_PCR + 7) / 8),
	TPM2_TIMEOUT_A		= 750,
	TPM2_TIMEOUT_B		= 2000,
	TPM2_TIMEOUT_C		= 200,
	TPM2_TIMEOUT_D		= 30,
	TPM2_DURATION_SHORT	= 20,
	TPM2_DURATION_MEDIUM	= 750,
	TPM2_DURATION_LONG	= 2000,
};

enum tpm2_structures {
	TPM2_ST_NO_SESSIONS	= 0x8001,
	TPM2_ST_SESSIONS	= 0x8002,
};

enum tpm2_return_codes {
	TPM2_RC_INITIALIZE	= 0x0100,
	TPM2_RC_TESTING		= 0x090A,
	TPM2_RC_DISABLED	= 0x0120,
};

enum tpm2_algorithms {
	TPM2_ALG_SHA1		= 0x0004,
};

enum tpm2_command_codes {
	TPM2_CC_FIRST		= 0x011F,
	TPM2_CC_SELF_TEST	= 0x0143,
	TPM2_CC_STARTUP		= 0x0144,
	TPM2_CC_SHUTDOWN	= 0x0145,
	TPM2_CC_GET_CAPABILITY	= 0x017A,
	TPM2_CC_GET_RANDOM	= 0x017B,
	TPM2_CC_PCR_READ	= 0x017E,
	TPM2_CC_PCR_EXTEND	= 0x0182,
	TPM2_CC_LAST		= 0x018F,
};

enum tpm2_permanent_handles {
	TPM2_RS_PW		= 0x40000009,
};

enum tpm2_capabilities {
	TPM2_CAP_TPM_PROPERTIES = 6,
};

enum tpm2_startup_types {
	TPM2_SU_CLEAR	= 0x0000,
	TPM2_SU_STATE	= 0x0001,
};

enum tpm2_start_method {
	TPM2_START_ACPI = 2,
	TPM2_START_FIFO = 6,
	TPM2_START_CRB = 7,
	TPM2_START_CRB_WITH_ACPI = 8,
};

struct tpm_chip;

struct tpm_vendor_specific {
	void __iomem *iobase;		/* ioremapped address */
	unsigned long base;		/* TPM base address */

	int irq;
	int probed_irq;

	int region_size;
	int have_region;

	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

#define TPM_PPI_VERSION_LEN		3

enum tpm_chip_flags {
	TPM_CHIP_FLAG_REGISTERED	= BIT(0),
	TPM_CHIP_FLAG_TPM2		= BIT(1),
};

struct tpm_chip {
	struct device *pdev;	/* Device stuff */
	struct device dev;
	struct cdev cdev;

	const struct tpm_class_ops *ops;
	unsigned int flags;

	int dev_num;		/* /dev/tpm# */
	char devname[7];
	unsigned long is_open;	/* only one allowed */
	int time_expired;

	struct mutex tpm_mutex;	/* tpm is processing */

	struct tpm_vendor_specific vendor;

	struct dentry **bios_dir;

#ifdef CONFIG_ACPI
	const struct attribute_group *groups[2];
	unsigned int groups_cnt;
	acpi_handle acpi_dev_handle;
	char ppi_version[TPM_PPI_VERSION_LEN + 1];
#endif /* CONFIG_ACPI */

	struct list_head list;
};

#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)

static inline void tpm_chip_put(struct tpm_chip *chip)
{
	module_put(chip->pdev->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;

#define TPM_TAG_RQU_COMMAND cpu_to_be16(193)

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;

enum tpm_capabilities {
	TPM_CAP_FLAG = cpu_to_be32(4),
	TPM_CAP_PROP = cpu_to_be32(5),
	CAP_VERSION_1_1 = cpu_to_be32(0x06),
	CAP_VERSION_1_2 = cpu_to_be32(0x1A)
};

enum tpm_sub_capabilities {
	TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
	TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
	TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
	TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
	TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
	TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
	TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),

};

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;

/* A string buffer type for constructing TPM commands. This is based on the
 * ideas of string buffer code in security/keys/trusted.h but is heap based
 * in order to keep the stack usage minimal.
 */

enum tpm_buf_flags {
	TPM_BUF_OVERFLOW	= BIT(0),
};

struct tpm_buf {
	struct page *data_page;
	unsigned int flags;
	u8 *data;
};

static inline void tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
{
	struct tpm_input_header *head;

	buf->data_page = alloc_page(GFP_HIGHUSER);
	if (!buf->data_page)
		return -ENOMEM;

	buf->flags = 0;
	buf->data = kmap(buf->data_page);

	head = (struct tpm_input_header *) buf->data;

	head->tag = cpu_to_be16(tag);
	head->length = cpu_to_be32(sizeof(*head));
	head->ordinal = cpu_to_be32(ordinal);

	return 0;
}

static inline void tpm_buf_destroy(struct tpm_buf *buf)
{
	kunmap(buf->data_page);
	__free_page(buf->data_page);
}

static inline u32 tpm_buf_length(struct tpm_buf *buf)
{
	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;

	return be32_to_cpu(head->length);
}

static inline u16 tpm_buf_tag(struct tpm_buf *buf)
{
	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;

	return be16_to_cpu(head->tag);
}

static inline void tpm_buf_append(struct tpm_buf *buf,
				  const unsigned char *new_data,
				  unsigned int new_len)
{
	struct tpm_input_header *head = (struct tpm_input_header *) buf->data;
	u32 len = tpm_buf_length(buf);

	/* Return silently if overflow has already happened. */
	if (buf->flags & TPM_BUF_OVERFLOW)
		return;

	if ((len + new_len) > PAGE_SIZE) {
		WARN(1, "tpm_buf: overflow\n");
		buf->flags |= TPM_BUF_OVERFLOW;
		return;
	}

	memcpy(&buf->data[len], new_data, new_len);
	head->length = cpu_to_be32(len + new_len);
}

static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
{
	tpm_buf_append(buf, &value, 1);
}

static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
{
	__be16 value2 = cpu_to_be16(value);

	tpm_buf_append(buf, (u8 *) &value2, 2);
}

static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
{
	__be32 value2 = cpu_to_be32(value);

	tpm_buf_append(buf, (u8 *) &value2, 4);
}

extern struct class *tpm_class;
extern dev_t tpm_devt;
extern const struct file_operations tpm_fops;

ssize_t	tpm_getcap(struct device *, __be32, cap_t *, const char *);
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
		     size_t bufsiz);
ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
			 const char *desc);
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 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);

struct tpm_chip *tpm_chip_find_get(int chip_num);
extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
				       const struct tpm_class_ops *ops);
extern int tpm_chip_register(struct tpm_chip *chip);
extern void tpm_chip_unregister(struct tpm_chip *chip);

int tpm_sysfs_add_device(struct tpm_chip *chip);
void tpm_sysfs_del_device(struct tpm_chip *chip);

int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);

#ifdef CONFIG_ACPI
extern void tpm_add_ppi(struct tpm_chip *chip);
#else
static inline void tpm_add_ppi(struct tpm_chip *chip)
{
}
#endif

int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
			u32 *value, const char *desc);

extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
extern int tpm2_do_selftest(struct tpm_chip *chip);
extern int tpm2_gen_interrupt(struct tpm_chip *chip);
extern int tpm2_probe(struct tpm_chip *chip);
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (C) 2004 IBM Corporation
a74f8b36	3	* Copyright (C) 2015 Intel Corporation
1da177e4 LT	4	*
	5	* Authors:
	6	* Leendert van Doorn <leendert@watson.ibm.com>
	7	* Dave Safford <safford@watson.ibm.com>
	8	* Reiner Sailer <sailer@watson.ibm.com>
	9	* Kylene Hall <kjhall@us.ibm.com>
	10	*
8e81cc13	11	* Maintained by: <tpmdd-devel@lists.sourceforge.net>
1da177e4 LT	12	*
1da177e4 LT	13	* Device driver for TCG/TCPA TPM (trusted platform module).
3b09825d	14	* Specifications at www.trustedcomputinggroup.org
1da177e4 LT	15	*
	16	* This program is free software; you can redistribute it and/or
	17	* modify it under the terms of the GNU General Public License as
	18	* published by the Free Software Foundation, version 2 of the
	19	* License.
3b09825d	20	*
1da177e4 LT	21	*/
1da177e4 LT	22	#include <linux/module.h>
1da177e4 LT	23	#include <linux/delay.h>
1da177e4 LT	24	#include <linux/fs.h>
d081d470	25	#include <linux/mutex.h>
914e2637	26	#include <linux/sched.h>
bbc5b212	27	#include <linux/platform_device.h>
276ad0c1	28	#include <linux/io.h>
659aaf2b	29	#include <linux/tpm.h>
0dc55365	30	#include <linux/acpi.h>
313d21ee	31	#include <linux/cdev.h>
a74f8b36	32	#include <linux/highmem.h>
1da177e4	33
41ab999c KY	34	enum tpm_const {
	35	TPM_MINOR = 224, /* officially assigned */
	36	TPM_BUFSIZE = 4096,
	37	TPM_NUM_DEVICES = 256,
32d33b29	38	TPM_RETRY = 50, /* 5 seconds */
41ab999c KY	39	};
41ab999c KY	40
3122a88a KH	41	enum tpm_timeout {
3122a88a KH	42	TPM_TIMEOUT = 5, /* msecs */
32d33b29	43	TPM_TIMEOUT_RETRY = 100 /* msecs */
3122a88a	44	};
1da177e4 LT	45
1da177e4 LT	46	/* TPM addresses */
3122a88a	47	enum tpm_addr {
daacdfa6	48	TPM_SUPERIO_ADDR = 0x2E,
3122a88a	49	TPM_ADDR = 0x4E,
3122a88a KH	50	};
3122a88a KH	51
000a07b0 JG	52	/* Indexes the duration array */
	53	enum tpm_duration {
	54	TPM_SHORT = 0,
	55	TPM_MEDIUM = 1,
	56	TPM_LONG = 2,
	57	TPM_UNDEFINED,
	58	};
	59
32d33b29	60	#define TPM_WARN_RETRY 0x800
68d6e671	61	#define TPM_WARN_DOING_SELFTEST 0x802
be405411 SB	62	#define TPM_ERR_DEACTIVATED 0x6
be405411 SB	63	#define TPM_ERR_DISABLED 0x7
c584af19	64	#define TPM_ERR_INVALID_POSTINIT 38
be405411	65
b9e3238a	66	#define TPM_HEADER_SIZE 10
7a1d7e6d JS	67
	68	enum tpm2_const {
	69	TPM2_PLATFORM_PCR = 24,
	70	TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
	71	TPM2_TIMEOUT_A = 750,
	72	TPM2_TIMEOUT_B = 2000,
	73	TPM2_TIMEOUT_C = 200,
	74	TPM2_TIMEOUT_D = 30,
	75	TPM2_DURATION_SHORT = 20,
	76	TPM2_DURATION_MEDIUM = 750,
	77	TPM2_DURATION_LONG = 2000,
	78	};
	79
	80	enum tpm2_structures {
	81	TPM2_ST_NO_SESSIONS = 0x8001,
	82	TPM2_ST_SESSIONS = 0x8002,
	83	};
	84
	85	enum tpm2_return_codes {
	86	TPM2_RC_INITIALIZE = 0x0100,
	87	TPM2_RC_TESTING = 0x090A,
	88	TPM2_RC_DISABLED = 0x0120,
	89	};
	90
	91	enum tpm2_algorithms {
	92	TPM2_ALG_SHA1 = 0x0004,
	93	};
	94
	95	enum tpm2_command_codes {
	96	TPM2_CC_FIRST = 0x011F,
	97	TPM2_CC_SELF_TEST = 0x0143,
	98	TPM2_CC_STARTUP = 0x0144,
	99	TPM2_CC_SHUTDOWN = 0x0145,
	100	TPM2_CC_GET_CAPABILITY = 0x017A,
	101	TPM2_CC_GET_RANDOM = 0x017B,
	102	TPM2_CC_PCR_READ = 0x017E,
	103	TPM2_CC_PCR_EXTEND = 0x0182,
	104	TPM2_CC_LAST = 0x018F,
	105	};
	106
	107	enum tpm2_permanent_handles {
	108	TPM2_RS_PW = 0x40000009,
	109	};
	110
	111	enum tpm2_capabilities {
	112	TPM2_CAP_TPM_PROPERTIES = 6,
	113	};
	114
	115	enum tpm2_startup_types {
	116	TPM2_SU_CLEAR = 0x0000,
	117	TPM2_SU_STATE = 0x0001,
	118	};
	119
399235dc JS	120	enum tpm2_start_method {
	121	TPM2_START_ACPI = 2,
	122	TPM2_START_FIFO = 6,
	123	TPM2_START_CRB = 7,
	124	TPM2_START_CRB_WITH_ACPI = 8,
	125	};
	126
1da177e4 LT	127	struct tpm_chip;
	128
	129	struct tpm_vendor_specific {
ad5ea3cc KJH	130	void __iomem iobase; / ioremapped address */
	131	unsigned long base; /* TPM base address */
	132
27084efe	133	int irq;
a7b66822	134	int probed_irq;
27084efe	135
ad5ea3cc KJH	136	int region_size;
ad5ea3cc KJH	137	int have_region;
1da177e4	138
27084efe LD	139	struct list_head list;
27084efe LD	140	int locality;
36b20020	141	unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
62592101	142	bool timeout_adjusted;
36b20020	143	unsigned long duration[3]; /* jiffies */
04ab2293	144	bool duration_adjusted;
775585e4	145	void *priv;
27084efe LD	146
	147	wait_queue_head_t read_queue;
	148	wait_queue_head_t int_queue;
3e3a5e90 SB	149
3e3a5e90 SB	150	u16 manufacturer_id;
1da177e4 LT	151	};
1da177e4 LT	152
3b09825d	153	#define TPM_VPRIV(c) ((c)->vendor.priv)
775585e4	154
4e401fb0	155	#define TPM_VID_INTEL 0x8086
1f866057 SB	156	#define TPM_VID_WINBOND 0x1050
1f866057 SB	157	#define TPM_VID_STM 0x104A
4e401fb0	158
0dc55365 JS	159	#define TPM_PPI_VERSION_LEN 3
0dc55365 JS	160
afb5abc2 JS	161	enum tpm_chip_flags {
afb5abc2 JS	162	TPM_CHIP_FLAG_REGISTERED = BIT(0),
9b774d5c	163	TPM_CHIP_FLAG_TPM2 = BIT(1),
afb5abc2 JS	164	};
afb5abc2 JS	165
1da177e4	166	struct tpm_chip {
71ed848f	167	struct device pdev; / Device stuff */
313d21ee JS	168	struct device dev;
	169	struct cdev cdev;
	170
5f82e9f0	171	const struct tpm_class_ops *ops;
afb5abc2	172	unsigned int flags;
1da177e4 LT	173
1da177e4 LT	174	int dev_num; /* /dev/tpm# */
6aff1fdc	175	char devname[7];
dc36d32c	176	unsigned long is_open; /* only one allowed */
1da177e4 LT	177	int time_expired;
1da177e4 LT	178
d081d470	179	struct mutex tpm_mutex; /* tpm is processing */
1da177e4	180
90dda520	181	struct tpm_vendor_specific vendor;
1da177e4	182
55a82ab3 KJH	183	struct dentry **bios_dir;
55a82ab3 KJH	184
0dc55365	185	#ifdef CONFIG_ACPI
9b774d5c JS	186	const struct attribute_group *groups[2];
9b774d5c JS	187	unsigned int groups_cnt;
0dc55365 JS	188	acpi_handle acpi_dev_handle;
	189	char ppi_version[TPM_PPI_VERSION_LEN + 1];
	190	#endif /* CONFIG_ACPI */
	191
1da177e4 LT	192	struct list_head list;
	193	};
	194
9b774d5c	195	#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
27084efe	196
a0e39349 MZ	197	static inline void tpm_chip_put(struct tpm_chip *chip)
a0e39349 MZ	198	{
71ed848f	199	module_put(chip->pdev->driver->owner);
a0e39349 MZ	200	}
a0e39349 MZ	201
daacdfa6	202	static inline int tpm_read_index(int base, int index)
1da177e4	203	{
daacdfa6 KJH	204	outb(index, base);
daacdfa6 KJH	205	return inb(base+1) & 0xFF;
1da177e4 LT	206	}
1da177e4 LT	207
daacdfa6	208	static inline void tpm_write_index(int base, int index, int value)
1da177e4	209	{
daacdfa6 KJH	210	outb(index, base);
daacdfa6 KJH	211	outb(value & 0xFF, base+1);
1da177e4	212	}
08837438 RA	213	struct tpm_input_header {
	214	__be16 tag;
	215	__be32 length;
	216	__be32 ordinal;
348df8db	217	} __packed;
08837438 RA	218
	219	struct tpm_output_header {
	220	__be16 tag;
	221	__be32 length;
	222	__be32 return_code;
348df8db	223	} __packed;
08837438	224
000a07b0 JG	225	#define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
000a07b0 JG	226
08837438 RA	227	struct stclear_flags_t {
	228	__be16 tag;
	229	u8 deactivated;
	230	u8 disableForceClear;
	231	u8 physicalPresence;
	232	u8 physicalPresenceLock;
	233	u8 bGlobalLock;
348df8db	234	} __packed;
08837438 RA	235
	236	struct tpm_version_t {
	237	u8 Major;
	238	u8 Minor;
	239	u8 revMajor;
	240	u8 revMinor;
348df8db	241	} __packed;
08837438 RA	242
	243	struct tpm_version_1_2_t {
	244	__be16 tag;
	245	u8 Major;
	246	u8 Minor;
	247	u8 revMajor;
	248	u8 revMinor;
348df8db	249	} __packed;
08837438 RA	250
	251	struct timeout_t {
	252	__be32 a;
	253	__be32 b;
	254	__be32 c;
	255	__be32 d;
348df8db	256	} __packed;
08837438 RA	257
	258	struct duration_t {
	259	__be32 tpm_short;
	260	__be32 tpm_medium;
	261	__be32 tpm_long;
348df8db	262	} __packed;
08837438 RA	263
	264	struct permanent_flags_t {
	265	__be16 tag;
	266	u8 disable;
	267	u8 ownership;
	268	u8 deactivated;
	269	u8 readPubek;
	270	u8 disableOwnerClear;
	271	u8 allowMaintenance;
	272	u8 physicalPresenceLifetimeLock;
	273	u8 physicalPresenceHWEnable;
	274	u8 physicalPresenceCMDEnable;
	275	u8 CEKPUsed;
	276	u8 TPMpost;
	277	u8 TPMpostLock;
	278	u8 FIPS;
	279	u8 operator;
	280	u8 enableRevokeEK;
	281	u8 nvLocked;
	282	u8 readSRKPub;
	283	u8 tpmEstablished;
	284	u8 maintenanceDone;
	285	u8 disableFullDALogicInfo;
348df8db	286	} __packed;
08837438 RA	287
	288	typedef union {
	289	struct permanent_flags_t perm_flags;
	290	struct stclear_flags_t stclear_flags;
	291	bool owned;
	292	__be32 num_pcrs;
	293	struct tpm_version_t tpm_version;
	294	struct tpm_version_1_2_t tpm_version_1_2;
	295	__be32 manufacturer_id;
	296	struct timeout_t timeout;
	297	struct duration_t duration;
	298	} cap_t;
	299
000a07b0 JG	300	enum tpm_capabilities {
	301	TPM_CAP_FLAG = cpu_to_be32(4),
	302	TPM_CAP_PROP = cpu_to_be32(5),
	303	CAP_VERSION_1_1 = cpu_to_be32(0x06),
	304	CAP_VERSION_1_2 = cpu_to_be32(0x1A)
	305	};
	306
	307	enum tpm_sub_capabilities {
	308	TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
	309	TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
	310	TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
	311	TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
	312	TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
	313	TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
	314	TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
	315
	316	};
	317
08837438 RA	318	struct tpm_getcap_params_in {
	319	__be32 cap;
	320	__be32 subcap_size;
	321	__be32 subcap;
348df8db	322	} __packed;
08837438 RA	323
	324	struct tpm_getcap_params_out {
	325	__be32 cap_size;
	326	cap_t cap;
348df8db	327	} __packed;
08837438 RA	328
	329	struct tpm_readpubek_params_out {
	330	u8 algorithm[4];
	331	u8 encscheme[2];
	332	u8 sigscheme[2];
02a077c5	333	__be32 paramsize;
08837438 RA	334	u8 parameters[12]; /assuming RSA/
	335	__be32 keysize;
	336	u8 modulus[256];
	337	u8 checksum[20];
348df8db	338	} __packed;
08837438 RA	339
	340	typedef union {
	341	struct tpm_input_header in;
	342	struct tpm_output_header out;
	343	} tpm_cmd_header;
	344
659aaf2b RA	345	struct tpm_pcrread_out {
659aaf2b RA	346	u8 pcr_result[TPM_DIGEST_SIZE];
348df8db	347	} __packed;
659aaf2b RA	348
	349	struct tpm_pcrread_in {
	350	__be32 pcr_idx;
348df8db	351	} __packed;
659aaf2b RA	352
	353	struct tpm_pcrextend_in {
	354	__be32 pcr_idx;
	355	u8 hash[TPM_DIGEST_SIZE];
348df8db	356	} __packed;
659aaf2b	357
41ab999c KY	358	/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
	359	* bytes, but 128 is still a relatively large number of random bytes and
	360	* anything much bigger causes users of struct tpm_cmd_t to start getting
	361	* compiler warnings about stack frame size. */
	362	#define TPM_MAX_RNG_DATA 128
	363
	364	struct tpm_getrandom_out {
	365	__be32 rng_data_len;
	366	u8 rng_data[TPM_MAX_RNG_DATA];
348df8db	367	} __packed;
41ab999c KY	368
	369	struct tpm_getrandom_in {
	370	__be32 num_bytes;
348df8db	371	} __packed;
41ab999c	372
c584af19 JG	373	struct tpm_startup_in {
	374	__be16 startup_type;
	375	} __packed;
	376
08837438 RA	377	typedef union {
	378	struct tpm_getcap_params_out getcap_out;
	379	struct tpm_readpubek_params_out readpubek_out;
	380	u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
	381	struct tpm_getcap_params_in getcap_in;
659aaf2b RA	382	struct tpm_pcrread_in pcrread_in;
	383	struct tpm_pcrread_out pcrread_out;
	384	struct tpm_pcrextend_in pcrextend_in;
41ab999c KY	385	struct tpm_getrandom_in getrandom_in;
41ab999c KY	386	struct tpm_getrandom_out getrandom_out;
c584af19	387	struct tpm_startup_in startup_in;
08837438 RA	388	} tpm_cmd_params;
	389
	390	struct tpm_cmd_t {
	391	tpm_cmd_header header;
	392	tpm_cmd_params params;
348df8db	393	} __packed;
08837438	394
a74f8b36 JS	395	/* A string buffer type for constructing TPM commands. This is based on the
	396	* ideas of string buffer code in security/keys/trusted.h but is heap based
	397	* in order to keep the stack usage minimal.
	398	*/
	399
	400	enum tpm_buf_flags {
	401	TPM_BUF_OVERFLOW = BIT(0),
	402	};
	403
	404	struct tpm_buf {
	405	struct page *data_page;
	406	unsigned int flags;
	407	u8 *data;
	408	};
	409
	410	static inline void tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal)
	411	{
	412	struct tpm_input_header *head;
	413
	414	buf->data_page = alloc_page(GFP_HIGHUSER);
	415	if (!buf->data_page)
	416	return -ENOMEM;
	417
	418	buf->flags = 0;
	419	buf->data = kmap(buf->data_page);
	420
	421	head = (struct tpm_input_header *) buf->data;
	422
	423	head->tag = cpu_to_be16(tag);
	424	head->length = cpu_to_be32(sizeof(*head));
	425	head->ordinal = cpu_to_be32(ordinal);
	426
	427	return 0;
	428	}
	429
	430	static inline void tpm_buf_destroy(struct tpm_buf *buf)
	431	{
	432	kunmap(buf->data_page);
	433	__free_page(buf->data_page);
	434	}
	435
	436	static inline u32 tpm_buf_length(struct tpm_buf *buf)
	437	{
	438	struct tpm_input_header head = (struct tpm_input_header ) buf->data;
	439
	440	return be32_to_cpu(head->length);
	441	}
	442
	443	static inline u16 tpm_buf_tag(struct tpm_buf *buf)
	444	{
	445	struct tpm_input_header head = (struct tpm_input_header ) buf->data;
	446
	447	return be16_to_cpu(head->tag);
	448	}
	449
	450	static inline void tpm_buf_append(struct tpm_buf *buf,
	451	const unsigned char *new_data,
	452	unsigned int new_len)
	453	{
	454	struct tpm_input_header head = (struct tpm_input_header ) buf->data;
	455	u32 len = tpm_buf_length(buf);
	456
	457	/* Return silently if overflow has already happened. */
	458	if (buf->flags & TPM_BUF_OVERFLOW)
459	return;
460
461	if ((len + new_len) > PAGE_SIZE) {
462	WARN(1, "tpm_buf: overflow\n");
463	buf->flags \|= TPM_BUF_OVERFLOW;
464	return;
465	}
466
467	memcpy(&buf->data[len], new_data, new_len);
468	head->length = cpu_to_be32(len + new_len);
469	}
470
471	static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value)
472	{
473	tpm_buf_append(buf, &value, 1);
474	}
475
476	static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value)
477	{
478	__be16 value2 = cpu_to_be16(value);
479
480	tpm_buf_append(buf, (u8 *) &value2, 2);
481	}
482
483	static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value)
484	{
485	__be32 value2 = cpu_to_be32(value);
486
487	tpm_buf_append(buf, (u8 *) &value2, 4);
488	}
489
313d21ee JS	490	extern struct class *tpm_class;
	491	extern dev_t tpm_devt;
	492	extern const struct file_operations tpm_fops;
	493
08837438	494	ssize_t tpm_getcap(struct device , __be32, cap_t , const char *);
afdba32e JG	495	ssize_t tpm_transmit(struct tpm_chip chip, const char buf,
afdba32e JG	496	size_t bufsiz);
87155b73 JS	497	ssize_t tpm_transmit_cmd(struct tpm_chip chip, void cmd, int len,
87155b73 JS	498	const char *desc);
2b30a90f	499	extern int tpm_get_timeouts(struct tpm_chip *);
08e96e48	500	extern void tpm_gen_interrupt(struct tpm_chip *);
68d6e671	501	extern int tpm_do_selftest(struct tpm_chip *);
9e18ee19	502	extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
035e2ce8	503	extern int tpm_pm_suspend(struct device *);
ce2c87d4	504	extern int tpm_pm_resume(struct device *);
fd048866	505	extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
78f09cc2	506	wait_queue_head_t *, bool);
f84fdff0	507
afb5abc2 JS	508	struct tpm_chip *tpm_chip_find_get(int chip_num);
	509	extern struct tpm_chip tpmm_chip_alloc(struct device dev,
	510	const struct tpm_class_ops *ops);
	511	extern int tpm_chip_register(struct tpm_chip *chip);
	512	extern void tpm_chip_unregister(struct tpm_chip *chip);
	513
1e3b73a9 JG	514	int tpm_sysfs_add_device(struct tpm_chip *chip);
1e3b73a9 JG	515	void tpm_sysfs_del_device(struct tpm_chip *chip);
afdba32e	516
000a07b0 JG	517	int tpm_pcr_read_dev(struct tpm_chip chip, int pcr_idx, u8 res_buf);
000a07b0 JG	518
f84fdff0	519	#ifdef CONFIG_ACPI
9b774d5c	520	extern void tpm_add_ppi(struct tpm_chip *chip);
f84fdff0	521	#else
9b774d5c	522	static inline void tpm_add_ppi(struct tpm_chip *chip)
1631cfb7 GW	523	{
1631cfb7 GW	524	}
f84fdff0	525	#endif
7a1d7e6d JS	526
	527	int tpm2_pcr_read(struct tpm_chip chip, int pcr_idx, u8 res_buf);
	528	int tpm2_pcr_extend(struct tpm_chip chip, int pcr_idx, const u8 hash);
	529	int tpm2_get_random(struct tpm_chip chip, u8 out, size_t max);
	530	ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
	531	u32 value, const char desc);
	532
	533	extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
74d6b3ce	534	extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
7a1d7e6d JS	535	extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
7a1d7e6d JS	536	extern int tpm2_do_selftest(struct tpm_chip *chip);
4d5f2051 JS	537	extern int tpm2_gen_interrupt(struct tpm_chip *chip);
4d5f2051 JS	538	extern int tpm2_probe(struct tpm_chip *chip);