[linux-block.git] / drivers / char / tpm / tpm-sysfs.c

/*
 * 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>
 *
 * Copyright (C) 2013 Obsidian Research Corp
 * Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
 *
 * sysfs filesystem inspection interface to the TPM
 *
 * 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/device.h>
#include "tpm.h"

#define READ_PUBEK_RESULT_SIZE 314
#define READ_PUBEK_RESULT_MIN_BODY_SIZE (28 + 256)
#define TPM_ORD_READPUBEK 124
static const struct tpm_input_header tpm_readpubek_header = {
	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
	.length = cpu_to_be32(30),
	.ordinal = cpu_to_be32(TPM_ORD_READPUBEK)
};
static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	u8 *data;
	struct tpm_cmd_t tpm_cmd;
	ssize_t err;
	int i, rc;
	char *str = buf;

	struct tpm_chip *chip = to_tpm_chip(dev);

	tpm_cmd.header.in = tpm_readpubek_header;
	err = tpm_transmit_cmd(chip, NULL, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
			       READ_PUBEK_RESULT_MIN_BODY_SIZE, 0,
			       "attempting to read the PUBEK");
	if (err)
		goto out;

	/*
	   ignore header 10 bytes
	   algorithm 32 bits (1 == RSA )
	   encscheme 16 bits
	   sigscheme 16 bits
	   parameters (RSA 12->bytes: keybit, #primes, expbit)
	   keylenbytes 32 bits
	   256 byte modulus
	   ignore checksum 20 bytes
	 */
	data = tpm_cmd.params.readpubek_out_buffer;
	str +=
	    sprintf(str,
		    "Algorithm: %02X %02X %02X %02X\n"
		    "Encscheme: %02X %02X\n"
		    "Sigscheme: %02X %02X\n"
		    "Parameters: %02X %02X %02X %02X "
		    "%02X %02X %02X %02X "
		    "%02X %02X %02X %02X\n"
		    "Modulus length: %d\n"
		    "Modulus:\n",
		    data[0], data[1], data[2], data[3],
		    data[4], data[5],
		    data[6], data[7],
		    data[12], data[13], data[14], data[15],
		    data[16], data[17], data[18], data[19],
		    data[20], data[21], data[22], data[23],
		    be32_to_cpu(*((__be32 *) (data + 24))));

	for (i = 0; i < 256; i++) {
		str += sprintf(str, "%02X ", data[i + 28]);
		if ((i + 1) % 16 == 0)
			str += sprintf(str, "\n");
	}
out:
	rc = str - buf;
	return rc;
}
static DEVICE_ATTR_RO(pubek);

static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	cap_t cap;
	u8 digest[TPM_DIGEST_SIZE];
	ssize_t rc;
	int i, j, num_pcrs;
	char *str = buf;
	struct tpm_chip *chip = to_tpm_chip(dev);

	rc = tpm_getcap(chip, TPM_CAP_PROP_PCR, &cap,
			"attempting to determine the number of PCRS",
			sizeof(cap.num_pcrs));
	if (rc)
		return 0;

	num_pcrs = be32_to_cpu(cap.num_pcrs);
	for (i = 0; i < num_pcrs; i++) {
		rc = tpm_pcr_read_dev(chip, i, digest);
		if (rc)
			break;
		str += sprintf(str, "PCR-%02d: ", i);
		for (j = 0; j < TPM_DIGEST_SIZE; j++)
			str += sprintf(str, "%02X ", digest[j]);
		str += sprintf(str, "\n");
	}
	return str - buf;
}
static DEVICE_ATTR_RO(pcrs);

static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
		     char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
			"attempting to determine the permanent enabled state",
			sizeof(cap.perm_flags));
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
	return rc;
}
static DEVICE_ATTR_RO(enabled);

static ssize_t active_show(struct device *dev, struct device_attribute *attr,
		    char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
			"attempting to determine the permanent active state",
			sizeof(cap.perm_flags));
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
	return rc;
}
static DEVICE_ATTR_RO(active);

static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
			  char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
			"attempting to determine the owner state",
			sizeof(cap.owned));
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", cap.owned);
	return rc;
}
static DEVICE_ATTR_RO(owned);

static ssize_t temp_deactivated_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	cap_t cap;
	ssize_t rc;

	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
			"attempting to determine the temporary state",
			sizeof(cap.stclear_flags));
	if (rc)
		return 0;

	rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
	return rc;
}
static DEVICE_ATTR_RO(temp_deactivated);

static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);
	cap_t cap;
	ssize_t rc;
	char *str = buf;

	rc = tpm_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
			"attempting to determine the manufacturer",
			sizeof(cap.manufacturer_id));
	if (rc)
		return 0;
	str += sprintf(str, "Manufacturer: 0x%x\n",
		       be32_to_cpu(cap.manufacturer_id));

	/* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
	rc = tpm_getcap(chip, TPM_CAP_VERSION_1_2, &cap,
			"attempting to determine the 1.2 version",
			sizeof(cap.tpm_version_1_2));
	if (!rc) {
		str += sprintf(str,
			       "TCG version: %d.%d\nFirmware version: %d.%d\n",
			       cap.tpm_version_1_2.Major,
			       cap.tpm_version_1_2.Minor,
			       cap.tpm_version_1_2.revMajor,
			       cap.tpm_version_1_2.revMinor);
	} else {
		/* Otherwise just use TPM_STRUCT_VER */
		rc = tpm_getcap(chip, TPM_CAP_VERSION_1_1, &cap,
				"attempting to determine the 1.1 version",
				sizeof(cap.tpm_version));
		if (rc)
			return 0;
		str += sprintf(str,
			       "TCG version: %d.%d\nFirmware version: %d.%d\n",
			       cap.tpm_version.Major,
			       cap.tpm_version.Minor,
			       cap.tpm_version.revMajor,
			       cap.tpm_version.revMinor);
	}

	return str - buf;
}
static DEVICE_ATTR_RO(caps);

static ssize_t cancel_store(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct tpm_chip *chip = to_tpm_chip(dev);
	if (chip == NULL)
		return 0;

	chip->ops->cancel(chip);
	return count;
}
static DEVICE_ATTR_WO(cancel);

static ssize_t durations_show(struct device *dev, struct device_attribute *attr,
			      char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	if (chip->duration[TPM_LONG] == 0)
		return 0;

	return sprintf(buf, "%d %d %d [%s]\n",
		       jiffies_to_usecs(chip->duration[TPM_SHORT]),
		       jiffies_to_usecs(chip->duration[TPM_MEDIUM]),
		       jiffies_to_usecs(chip->duration[TPM_LONG]),
		       chip->duration_adjusted
		       ? "adjusted" : "original");
}
static DEVICE_ATTR_RO(durations);

static ssize_t timeouts_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	struct tpm_chip *chip = to_tpm_chip(dev);

	return sprintf(buf, "%d %d %d %d [%s]\n",
		       jiffies_to_usecs(chip->timeout_a),
		       jiffies_to_usecs(chip->timeout_b),
		       jiffies_to_usecs(chip->timeout_c),
		       jiffies_to_usecs(chip->timeout_d),
		       chip->timeout_adjusted
		       ? "adjusted" : "original");
}
static DEVICE_ATTR_RO(timeouts);

static struct attribute *tpm_dev_attrs[] = {
	&dev_attr_pubek.attr,
	&dev_attr_pcrs.attr,
	&dev_attr_enabled.attr,
	&dev_attr_active.attr,
	&dev_attr_owned.attr,
	&dev_attr_temp_deactivated.attr,
	&dev_attr_caps.attr,
	&dev_attr_cancel.attr,
	&dev_attr_durations.attr,
	&dev_attr_timeouts.attr,
	NULL,
};

static const struct attribute_group tpm_dev_group = {
	.attrs = tpm_dev_attrs,
};

void tpm_sysfs_add_device(struct tpm_chip *chip)
{
	if (chip->flags & TPM_CHIP_FLAG_TPM2)
		return;

	/* The sysfs routines rely on an implicit tpm_try_get_ops, device_del
	 * is called before ops is null'd and the sysfs core synchronizes this
	 * removal so that no callbacks are running or can run again
	 */
	WARN_ON(chip->groups_cnt != 0);
	chip->groups[chip->groups_cnt++] = &tpm_dev_group;
}
Commit	Line	Data
000a07b0 JG	1	/*
	2	* Copyright (C) 2004 IBM Corporation
	3	* Authors:
	4	* Leendert van Doorn <leendert@watson.ibm.com>
	5	* Dave Safford <safford@watson.ibm.com>
	6	* Reiner Sailer <sailer@watson.ibm.com>
	7	* Kylene Hall <kjhall@us.ibm.com>
	8	*
1e3b73a9 JG	9	* Copyright (C) 2013 Obsidian Research Corp
	10	* Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
	11	*
000a07b0 JG	12	* sysfs filesystem inspection interface to the TPM
	13	*
	14	* This program is free software; you can redistribute it and/or
	15	* modify it under the terms of the GNU General Public License as
	16	* published by the Free Software Foundation, version 2 of the
	17	* License.
	18	*
	19	*/
	20	#include <linux/device.h>
	21	#include "tpm.h"
	22
000a07b0	23	#define READ_PUBEK_RESULT_SIZE 314
c659af78	24	#define READ_PUBEK_RESULT_MIN_BODY_SIZE (28 + 256)
a69faebf	25	#define TPM_ORD_READPUBEK 124
0014777f	26	static const struct tpm_input_header tpm_readpubek_header = {
06e93279	27	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
000a07b0	28	.length = cpu_to_be32(30),
a69faebf	29	.ordinal = cpu_to_be32(TPM_ORD_READPUBEK)
000a07b0	30	};
1e3b73a9 JG	31	static ssize_t pubek_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	32	char *buf)
000a07b0 JG	33	{
	34	u8 *data;
	35	struct tpm_cmd_t tpm_cmd;
	36	ssize_t err;
	37	int i, rc;
	38	char *str = buf;
	39
062807f2	40	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0 JG	41
000a07b0 JG	42	tpm_cmd.header.in = tpm_readpubek_header;
745b361e	43	err = tpm_transmit_cmd(chip, NULL, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
c659af78	44	READ_PUBEK_RESULT_MIN_BODY_SIZE, 0,
87155b73	45	"attempting to read the PUBEK");
000a07b0 JG	46	if (err)
	47	goto out;
	48
	49	/*
	50	ignore header 10 bytes
	51	algorithm 32 bits (1 == RSA )
	52	encscheme 16 bits
	53	sigscheme 16 bits
	54	parameters (RSA 12->bytes: keybit, #primes, expbit)
	55	keylenbytes 32 bits
	56	256 byte modulus
	57	ignore checksum 20 bytes
	58	*/
	59	data = tpm_cmd.params.readpubek_out_buffer;
	60	str +=
	61	sprintf(str,
	62	"Algorithm: %02X %02X %02X %02X\n"
	63	"Encscheme: %02X %02X\n"
	64	"Sigscheme: %02X %02X\n"
	65	"Parameters: %02X %02X %02X %02X "
	66	"%02X %02X %02X %02X "
	67	"%02X %02X %02X %02X\n"
	68	"Modulus length: %d\n"
	69	"Modulus:\n",
	70	data[0], data[1], data[2], data[3],
	71	data[4], data[5],
	72	data[6], data[7],
	73	data[12], data[13], data[14], data[15],
	74	data[16], data[17], data[18], data[19],
	75	data[20], data[21], data[22], data[23],
	76	be32_to_cpu(((__be32 ) (data + 24))));
	77
	78	for (i = 0; i < 256; i++) {
	79	str += sprintf(str, "%02X ", data[i + 28]);
	80	if ((i + 1) % 16 == 0)
	81	str += sprintf(str, "\n");
	82	}
	83	out:
	84	rc = str - buf;
	85	return rc;
	86	}
1e3b73a9	87	static DEVICE_ATTR_RO(pubek);
000a07b0	88
1e3b73a9 JG	89	static ssize_t pcrs_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	90	char *buf)
000a07b0 JG	91	{
	92	cap_t cap;
	93	u8 digest[TPM_DIGEST_SIZE];
	94	ssize_t rc;
	95	int i, j, num_pcrs;
	96	char *str = buf;
062807f2	97	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0	98
062807f2	99	rc = tpm_getcap(chip, TPM_CAP_PROP_PCR, &cap,
c659af78 SB	100	"attempting to determine the number of PCRS",
c659af78 SB	101	sizeof(cap.num_pcrs));
000a07b0 JG	102	if (rc)
	103	return 0;
	104
	105	num_pcrs = be32_to_cpu(cap.num_pcrs);
	106	for (i = 0; i < num_pcrs; i++) {
	107	rc = tpm_pcr_read_dev(chip, i, digest);
	108	if (rc)
	109	break;
	110	str += sprintf(str, "PCR-%02d: ", i);
	111	for (j = 0; j < TPM_DIGEST_SIZE; j++)
	112	str += sprintf(str, "%02X ", digest[j]);
	113	str += sprintf(str, "\n");
	114	}
	115	return str - buf;
	116	}
1e3b73a9	117	static DEVICE_ATTR_RO(pcrs);
000a07b0	118
1e3b73a9 JG	119	static ssize_t enabled_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	120	char *buf)
000a07b0 JG	121	{
	122	cap_t cap;
	123	ssize_t rc;
	124
062807f2	125	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
c659af78 SB	126	"attempting to determine the permanent enabled state",
c659af78 SB	127	sizeof(cap.perm_flags));
000a07b0 JG	128	if (rc)
	129	return 0;
	130
	131	rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
	132	return rc;
	133	}
1e3b73a9	134	static DEVICE_ATTR_RO(enabled);
000a07b0	135
5f64822d	136	static ssize_t active_show(struct device dev, struct device_attribute attr,
1e3b73a9	137	char *buf)
000a07b0 JG	138	{
	139	cap_t cap;
	140	ssize_t rc;
	141
062807f2	142	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
c659af78 SB	143	"attempting to determine the permanent active state",
c659af78 SB	144	sizeof(cap.perm_flags));
000a07b0 JG	145	if (rc)
	146	return 0;
	147
	148	rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
	149	return rc;
	150	}
1e3b73a9	151	static DEVICE_ATTR_RO(active);
000a07b0	152
1e3b73a9 JG	153	static ssize_t owned_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	154	char *buf)
000a07b0 JG	155	{
	156	cap_t cap;
	157	ssize_t rc;
	158
062807f2	159	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
c659af78 SB	160	"attempting to determine the owner state",
c659af78 SB	161	sizeof(cap.owned));
000a07b0 JG	162	if (rc)
	163	return 0;
	164
	165	rc = sprintf(buf, "%d\n", cap.owned);
	166	return rc;
	167	}
1e3b73a9	168	static DEVICE_ATTR_RO(owned);
000a07b0	169
1e3b73a9 JG	170	static ssize_t temp_deactivated_show(struct device *dev,
1e3b73a9 JG	171	struct device_attribute attr, char buf)
000a07b0 JG	172	{
	173	cap_t cap;
	174	ssize_t rc;
	175
062807f2	176	rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
c659af78 SB	177	"attempting to determine the temporary state",
c659af78 SB	178	sizeof(cap.stclear_flags));
000a07b0 JG	179	if (rc)
	180	return 0;
	181
	182	rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
	183	return rc;
	184	}
1e3b73a9	185	static DEVICE_ATTR_RO(temp_deactivated);
000a07b0	186
1e3b73a9 JG	187	static ssize_t caps_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	188	char *buf)
000a07b0	189	{
062807f2	190	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0 JG	191	cap_t cap;
	192	ssize_t rc;
	193	char *str = buf;
	194
062807f2	195	rc = tpm_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
c659af78 SB	196	"attempting to determine the manufacturer",
c659af78 SB	197	sizeof(cap.manufacturer_id));
000a07b0 JG	198	if (rc)
	199	return 0;
	200	str += sprintf(str, "Manufacturer: 0x%x\n",
	201	be32_to_cpu(cap.manufacturer_id));
	202
	203	/* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
84fda152	204	rc = tpm_getcap(chip, TPM_CAP_VERSION_1_2, &cap,
c659af78 SB	205	"attempting to determine the 1.2 version",
c659af78 SB	206	sizeof(cap.tpm_version_1_2));
000a07b0 JG	207	if (!rc) {
	208	str += sprintf(str,
	209	"TCG version: %d.%d\nFirmware version: %d.%d\n",
	210	cap.tpm_version_1_2.Major,
	211	cap.tpm_version_1_2.Minor,
	212	cap.tpm_version_1_2.revMajor,
	213	cap.tpm_version_1_2.revMinor);
	214	} else {
	215	/* Otherwise just use TPM_STRUCT_VER */
84fda152	216	rc = tpm_getcap(chip, TPM_CAP_VERSION_1_1, &cap,
c659af78 SB	217	"attempting to determine the 1.1 version",
c659af78 SB	218	sizeof(cap.tpm_version));
000a07b0 JG	219	if (rc)
	220	return 0;
	221	str += sprintf(str,
	222	"TCG version: %d.%d\nFirmware version: %d.%d\n",
	223	cap.tpm_version.Major,
	224	cap.tpm_version.Minor,
	225	cap.tpm_version.revMajor,
	226	cap.tpm_version.revMinor);
	227	}
	228
	229	return str - buf;
	230	}
1e3b73a9	231	static DEVICE_ATTR_RO(caps);
000a07b0	232
1e3b73a9 JG	233	static ssize_t cancel_store(struct device dev, struct device_attribute attr,
1e3b73a9 JG	234	const char *buf, size_t count)
000a07b0	235	{
062807f2	236	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0 JG	237	if (chip == NULL)
	238	return 0;
	239
5f82e9f0	240	chip->ops->cancel(chip);
000a07b0 JG	241	return count;
000a07b0 JG	242	}
1e3b73a9	243	static DEVICE_ATTR_WO(cancel);
000a07b0	244
1e3b73a9 JG	245	static ssize_t durations_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	246	char *buf)
000a07b0	247	{
062807f2	248	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0	249
af782f33	250	if (chip->duration[TPM_LONG] == 0)
000a07b0 JG	251	return 0;
	252
	253	return sprintf(buf, "%d %d %d [%s]\n",
af782f33 CR	254	jiffies_to_usecs(chip->duration[TPM_SHORT]),
	255	jiffies_to_usecs(chip->duration[TPM_MEDIUM]),
	256	jiffies_to_usecs(chip->duration[TPM_LONG]),
	257	chip->duration_adjusted
000a07b0 JG	258	? "adjusted" : "original");
000a07b0 JG	259	}
1e3b73a9	260	static DEVICE_ATTR_RO(durations);
000a07b0	261
1e3b73a9 JG	262	static ssize_t timeouts_show(struct device dev, struct device_attribute attr,
1e3b73a9 JG	263	char *buf)
000a07b0	264	{
062807f2	265	struct tpm_chip *chip = to_tpm_chip(dev);
000a07b0 JG	266
000a07b0 JG	267	return sprintf(buf, "%d %d %d %d [%s]\n",
af782f33 CR	268	jiffies_to_usecs(chip->timeout_a),
	269	jiffies_to_usecs(chip->timeout_b),
	270	jiffies_to_usecs(chip->timeout_c),
	271	jiffies_to_usecs(chip->timeout_d),
	272	chip->timeout_adjusted
000a07b0 JG	273	? "adjusted" : "original");
000a07b0 JG	274	}
1e3b73a9 JG	275	static DEVICE_ATTR_RO(timeouts);
	276
	277	static struct attribute *tpm_dev_attrs[] = {
	278	&dev_attr_pubek.attr,
	279	&dev_attr_pcrs.attr,
	280	&dev_attr_enabled.attr,
	281	&dev_attr_active.attr,
	282	&dev_attr_owned.attr,
	283	&dev_attr_temp_deactivated.attr,
	284	&dev_attr_caps.attr,
	285	&dev_attr_cancel.attr,
	286	&dev_attr_durations.attr,
	287	&dev_attr_timeouts.attr,
	288	NULL,
	289	};
	290
	291	static const struct attribute_group tpm_dev_group = {
	292	.attrs = tpm_dev_attrs,
	293	};
	294
062807f2	295	void tpm_sysfs_add_device(struct tpm_chip *chip)
1e3b73a9	296	{
7518a21a JS	297	if (chip->flags & TPM_CHIP_FLAG_TPM2)
	298	return;
	299
062807f2 JG	300	/* The sysfs routines rely on an implicit tpm_try_get_ops, device_del
	301	* is called before ops is null'd and the sysfs core synchronizes this
	302	* removal so that no callbacks are running or can run again
4e26195f	303	*/
062807f2 JG	304	WARN_ON(chip->groups_cnt != 0);
062807f2 JG	305	chip->groups[chip->groups_cnt++] = &tpm_dev_group;
1e3b73a9	306	}