[linux-2.6-block.git] / drivers / firmware / dmi-id.c

/*
 * Export SMBIOS/DMI info via sysfs to userspace
 *
 * Copyright 2007, Lennart Poettering
 *
 * Licensed under GPLv2
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/device.h>

struct dmi_device_attribute{
	struct device_attribute dev_attr;
	int field;
};
#define to_dmi_dev_attr(_dev_attr) \
	container_of(_dev_attr, struct dmi_device_attribute, dev_attr)

static ssize_t sys_dmi_field_show(struct device *dev,
				  struct device_attribute *attr,
				  char *page)
{
	int field = to_dmi_dev_attr(attr)->field;
	ssize_t len;
	len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(field));
	page[len-1] = '\n';
	return len;
}

#define DMI_ATTR(_name, _mode, _show, _field)			\
	{ .dev_attr = __ATTR(_name, _mode, _show, NULL),	\
	  .field = _field }

#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field)		\
static struct dmi_device_attribute sys_dmi_##_name##_attr =	\
	DMI_ATTR(_name, _mode, sys_dmi_field_show, _field);

DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor,		0444, DMI_BIOS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(bios_version,		0444, DMI_BIOS_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(bios_date,		0444, DMI_BIOS_DATE);
DEFINE_DMI_ATTR_WITH_SHOW(sys_vendor,		0444, DMI_SYS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(product_name,		0444, DMI_PRODUCT_NAME);
DEFINE_DMI_ATTR_WITH_SHOW(product_version,	0444, DMI_PRODUCT_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(product_serial,	0400, DMI_PRODUCT_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(product_uuid,		0400, DMI_PRODUCT_UUID);
DEFINE_DMI_ATTR_WITH_SHOW(board_vendor,		0444, DMI_BOARD_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(board_name,		0444, DMI_BOARD_NAME);
DEFINE_DMI_ATTR_WITH_SHOW(board_version,	0444, DMI_BOARD_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(board_serial,		0400, DMI_BOARD_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(board_asset_tag,	0444, DMI_BOARD_ASSET_TAG);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_vendor,	0444, DMI_CHASSIS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_type,		0444, DMI_CHASSIS_TYPE);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_version,	0444, DMI_CHASSIS_VERSION);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_serial,	0400, DMI_CHASSIS_SERIAL);
DEFINE_DMI_ATTR_WITH_SHOW(chassis_asset_tag,	0444, DMI_CHASSIS_ASSET_TAG);

static void ascii_filter(char *d, const char *s)
{
	/* Filter out characters we don't want to see in the modalias string */
	for (; *s; s++)
		if (*s > ' ' && *s < 127 && *s != ':')
			*(d++) = *s;

	*d = 0;
}

static ssize_t get_modalias(char *buffer, size_t buffer_size)
{
	static const struct mafield {
		const char *prefix;
		int field;
	} fields[] = {
		{ "bvn", DMI_BIOS_VENDOR },
		{ "bvr", DMI_BIOS_VERSION },
		{ "bd",  DMI_BIOS_DATE },
		{ "svn", DMI_SYS_VENDOR },
		{ "pn",  DMI_PRODUCT_NAME },
		{ "pvr", DMI_PRODUCT_VERSION },
		{ "rvn", DMI_BOARD_VENDOR },
		{ "rn",  DMI_BOARD_NAME },
		{ "rvr", DMI_BOARD_VERSION },
		{ "cvn", DMI_CHASSIS_VENDOR },
		{ "ct",  DMI_CHASSIS_TYPE },
		{ "cvr", DMI_CHASSIS_VERSION },
		{ NULL,  DMI_NONE }
	};

	ssize_t l, left;
	char *p;
	const struct mafield *f;

	strcpy(buffer, "dmi");
	p = buffer + 3; left = buffer_size - 4;

	for (f = fields; f->prefix && left > 0; f++) {
		const char *c;
		char *t;

		c = dmi_get_system_info(f->field);
		if (!c)
			continue;

		t = kmalloc(strlen(c) + 1, GFP_KERNEL);
		if (!t)
			break;
		ascii_filter(t, c);
		l = scnprintf(p, left, ":%s%s", f->prefix, t);
		kfree(t);

		p += l;
		left -= l;
	}

	p[0] = ':';
	p[1] = 0;

	return p - buffer + 1;
}

static ssize_t sys_dmi_modalias_show(struct device *dev,
				     struct device_attribute *attr, char *page)
{
	ssize_t r;
	r = get_modalias(page, PAGE_SIZE-1);
	page[r] = '\n';
	page[r+1] = 0;
	return r+1;
}

static struct device_attribute sys_dmi_modalias_attr =
	__ATTR(modalias, 0444, sys_dmi_modalias_show, NULL);

static struct attribute *sys_dmi_attributes[DMI_STRING_MAX+2];

static struct attribute_group sys_dmi_attribute_group = {
	.attrs = sys_dmi_attributes,
};

static struct attribute_group* sys_dmi_attribute_groups[] = {
	&sys_dmi_attribute_group,
	NULL
};

static int dmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	ssize_t len;

	if (add_uevent_var(env, "MODALIAS="))
		return -ENOMEM;
	len = get_modalias(&env->buf[env->buflen - 1],
			   sizeof(env->buf) - env->buflen);
	if (len >= (sizeof(env->buf) - env->buflen))
		return -ENOMEM;
	env->buflen += len;
	return 0;
}

static struct class dmi_class = {
	.name = "dmi",
	.dev_release = (void(*)(struct device *)) kfree,
	.dev_uevent = dmi_dev_uevent,
};

static struct device *dmi_dev;

/* Initialization */

#define ADD_DMI_ATTR(_name, _field) \
	if (dmi_get_system_info(_field)) \
		sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;

/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
   dmi_id_init! */
static void __init dmi_id_init_attr_table(void)
{
	int i;

	/* Not necessarily all DMI fields are available on all
	 * systems, hence let's built an attribute table of just
	 * what's available */
	i = 0;
	ADD_DMI_ATTR(bios_vendor,       DMI_BIOS_VENDOR);
	ADD_DMI_ATTR(bios_version,      DMI_BIOS_VERSION);
	ADD_DMI_ATTR(bios_date,         DMI_BIOS_DATE);
	ADD_DMI_ATTR(sys_vendor,        DMI_SYS_VENDOR);
	ADD_DMI_ATTR(product_name,      DMI_PRODUCT_NAME);
	ADD_DMI_ATTR(product_version,   DMI_PRODUCT_VERSION);
	ADD_DMI_ATTR(product_serial,    DMI_PRODUCT_SERIAL);
	ADD_DMI_ATTR(product_uuid,      DMI_PRODUCT_UUID);
	ADD_DMI_ATTR(board_vendor,      DMI_BOARD_VENDOR);
	ADD_DMI_ATTR(board_name,        DMI_BOARD_NAME);
	ADD_DMI_ATTR(board_version,     DMI_BOARD_VERSION);
	ADD_DMI_ATTR(board_serial,      DMI_BOARD_SERIAL);
	ADD_DMI_ATTR(board_asset_tag,   DMI_BOARD_ASSET_TAG);
	ADD_DMI_ATTR(chassis_vendor,    DMI_CHASSIS_VENDOR);
	ADD_DMI_ATTR(chassis_type,      DMI_CHASSIS_TYPE);
	ADD_DMI_ATTR(chassis_version,   DMI_CHASSIS_VERSION);
	ADD_DMI_ATTR(chassis_serial,    DMI_CHASSIS_SERIAL);
	ADD_DMI_ATTR(chassis_asset_tag, DMI_CHASSIS_ASSET_TAG);
	sys_dmi_attributes[i++] = &sys_dmi_modalias_attr.attr;
}

static int __init dmi_id_init(void)
{
	int ret;

	if (!dmi_available)
		return -ENODEV;

	dmi_id_init_attr_table();

	ret = class_register(&dmi_class);
	if (ret)
		return ret;

	dmi_dev = kzalloc(sizeof(*dmi_dev), GFP_KERNEL);
	if (!dmi_dev) {
		ret = -ENOMEM;
		goto fail_class_unregister;
	}

	dmi_dev->class = &dmi_class;
	dev_set_name(dmi_dev, "id");
	dmi_dev->groups = sys_dmi_attribute_groups;

	ret = device_register(dmi_dev);
	if (ret)
		goto fail_class_unregister;

	return 0;

fail_class_unregister:

	class_unregister(&dmi_class);

	return ret;
}

arch_initcall(dmi_id_init);
Commit	Line	Data
4f5c791a LP	1	/*
	2	* Export SMBIOS/DMI info via sysfs to userspace
	3	*
	4	* Copyright 2007, Lennart Poettering
	5	*
	6	* Licensed under GPLv2
	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <linux/dmi.h>
	13	#include <linux/device.h>
4f5c791a	14
63744756 JD	15	struct dmi_device_attribute{
	16	struct device_attribute dev_attr;
	17	int field;
	18	};
	19	#define to_dmi_dev_attr(_dev_attr) \
	20	container_of(_dev_attr, struct dmi_device_attribute, dev_attr)
	21
63744756 JD	22	static ssize_t sys_dmi_field_show(struct device *dev,
	23	struct device_attribute *attr,
	24	char *page)
	25	{
	26	int field = to_dmi_dev_attr(attr)->field;
	27	ssize_t len;
	28	len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(field));
	29	page[len-1] = '\n';
	30	return len;
	31	}
	32
	33	#define DMI_ATTR(_name, _mode, _show, _field) \
	34	{ .dev_attr = __ATTR(_name, _mode, _show, NULL), \
	35	.field = _field }
	36
	37	#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field) \
	38	static struct dmi_device_attribute sys_dmi_##_name##_attr = \
	39	DMI_ATTR(_name, _mode, sys_dmi_field_show, _field);
4f5c791a LP	40
	41	DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor, 0444, DMI_BIOS_VENDOR);
	42	DEFINE_DMI_ATTR_WITH_SHOW(bios_version, 0444, DMI_BIOS_VERSION);
	43	DEFINE_DMI_ATTR_WITH_SHOW(bios_date, 0444, DMI_BIOS_DATE);
	44	DEFINE_DMI_ATTR_WITH_SHOW(sys_vendor, 0444, DMI_SYS_VENDOR);
	45	DEFINE_DMI_ATTR_WITH_SHOW(product_name, 0444, DMI_PRODUCT_NAME);
	46	DEFINE_DMI_ATTR_WITH_SHOW(product_version, 0444, DMI_PRODUCT_VERSION);
	47	DEFINE_DMI_ATTR_WITH_SHOW(product_serial, 0400, DMI_PRODUCT_SERIAL);
	48	DEFINE_DMI_ATTR_WITH_SHOW(product_uuid, 0400, DMI_PRODUCT_UUID);
	49	DEFINE_DMI_ATTR_WITH_SHOW(board_vendor, 0444, DMI_BOARD_VENDOR);
	50	DEFINE_DMI_ATTR_WITH_SHOW(board_name, 0444, DMI_BOARD_NAME);
	51	DEFINE_DMI_ATTR_WITH_SHOW(board_version, 0444, DMI_BOARD_VERSION);
	52	DEFINE_DMI_ATTR_WITH_SHOW(board_serial, 0400, DMI_BOARD_SERIAL);
	53	DEFINE_DMI_ATTR_WITH_SHOW(board_asset_tag, 0444, DMI_BOARD_ASSET_TAG);
	54	DEFINE_DMI_ATTR_WITH_SHOW(chassis_vendor, 0444, DMI_CHASSIS_VENDOR);
	55	DEFINE_DMI_ATTR_WITH_SHOW(chassis_type, 0444, DMI_CHASSIS_TYPE);
	56	DEFINE_DMI_ATTR_WITH_SHOW(chassis_version, 0444, DMI_CHASSIS_VERSION);
	57	DEFINE_DMI_ATTR_WITH_SHOW(chassis_serial, 0400, DMI_CHASSIS_SERIAL);
	58	DEFINE_DMI_ATTR_WITH_SHOW(chassis_asset_tag, 0444, DMI_CHASSIS_ASSET_TAG);
	59
	60	static void ascii_filter(char d, const char s)
	61	{
	62	/* Filter out characters we don't want to see in the modalias string */
	63	for (; *s; s++)
	64	if (s > ' ' && s < 127 && *s != ':')
	65	(d++) = s;
	66
	67	*d = 0;
	68	}
	69
	70	static ssize_t get_modalias(char *buffer, size_t buffer_size)
	71	{
	72	static const struct mafield {
	73	const char *prefix;
	74	int field;
	75	} fields[] = {
	76	{ "bvn", DMI_BIOS_VENDOR },
	77	{ "bvr", DMI_BIOS_VERSION },
	78	{ "bd", DMI_BIOS_DATE },
	79	{ "svn", DMI_SYS_VENDOR },
	80	{ "pn", DMI_PRODUCT_NAME },
	81	{ "pvr", DMI_PRODUCT_VERSION },
	82	{ "rvn", DMI_BOARD_VENDOR },
	83	{ "rn", DMI_BOARD_NAME },
	84	{ "rvr", DMI_BOARD_VERSION },
	85	{ "cvn", DMI_CHASSIS_VENDOR },
	86	{ "ct", DMI_CHASSIS_TYPE },
	87	{ "cvr", DMI_CHASSIS_VERSION },
	88	{ NULL, DMI_NONE }
	89	};
	90
	91	ssize_t l, left;
	92	char *p;
	93	const struct mafield *f;
	94
	95	strcpy(buffer, "dmi");
	96	p = buffer + 3; left = buffer_size - 4;
	97
	98	for (f = fields; f->prefix && left > 0; f++) {
	99	const char *c;
	100	char *t;
	101
	102	c = dmi_get_system_info(f->field);
	103	if (!c)
104	continue;
105
106	t = kmalloc(strlen(c) + 1, GFP_KERNEL);
107	if (!t)
108	break;
109	ascii_filter(t, c);
110	l = scnprintf(p, left, ":%s%s", f->prefix, t);
111	kfree(t);
112
113	p += l;
114	left -= l;
115	}
116
117	p[0] = ':';
118	p[1] = 0;
119
120	return p - buffer + 1;
121	}
122
123	static ssize_t sys_dmi_modalias_show(struct device *dev,
124	struct device_attribute attr, char page)
125	{
126	ssize_t r;
127	r = get_modalias(page, PAGE_SIZE-1);
128	page[r] = '\n';
129	page[r+1] = 0;
130	return r+1;
131	}
132
34b51f39 JD	133	static struct device_attribute sys_dmi_modalias_attr =
34b51f39 JD	134	__ATTR(modalias, 0444, sys_dmi_modalias_show, NULL);
4f5c791a LP	135
	136	static struct attribute *sys_dmi_attributes[DMI_STRING_MAX+2];
	137
	138	static struct attribute_group sys_dmi_attribute_group = {
	139	.attrs = sys_dmi_attributes,
	140	};
	141
	142	static struct attribute_group* sys_dmi_attribute_groups[] = {
	143	&sys_dmi_attribute_group,
	144	NULL
	145	};
	146
7eff2e7a	147	static int dmi_dev_uevent(struct device dev, struct kobj_uevent_env env)
4f5c791a	148	{
7eff2e7a KS	149	ssize_t len;
	150
	151	if (add_uevent_var(env, "MODALIAS="))
	152	return -ENOMEM;
	153	len = get_modalias(&env->buf[env->buflen - 1],
	154	sizeof(env->buf) - env->buflen);
	155	if (len >= (sizeof(env->buf) - env->buflen))
	156	return -ENOMEM;
	157	env->buflen += len;
4f5c791a LP	158	return 0;
	159	}
	160
	161	static struct class dmi_class = {
	162	.name = "dmi",
	163	.dev_release = (void()(struct device )) kfree,
	164	.dev_uevent = dmi_dev_uevent,
	165	};
	166
	167	static struct device *dmi_dev;
	168
	169	/* Initialization */
	170
	171	#define ADD_DMI_ATTR(_name, _field) \
	172	if (dmi_get_system_info(_field)) \
63744756	173	sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;
4f5c791a	174
ce8c628a JD	175	/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
	176	dmi_id_init! */
	177	static void __init dmi_id_init_attr_table(void)
4f5c791a	178	{
ce8c628a	179	int i;
4f5c791a LP	180
	181	/* Not necessarily all DMI fields are available on all
	182	* systems, hence let's built an attribute table of just
	183	* what's available */
	184	i = 0;
	185	ADD_DMI_ATTR(bios_vendor, DMI_BIOS_VENDOR);
	186	ADD_DMI_ATTR(bios_version, DMI_BIOS_VERSION);
	187	ADD_DMI_ATTR(bios_date, DMI_BIOS_DATE);
	188	ADD_DMI_ATTR(sys_vendor, DMI_SYS_VENDOR);
	189	ADD_DMI_ATTR(product_name, DMI_PRODUCT_NAME);
	190	ADD_DMI_ATTR(product_version, DMI_PRODUCT_VERSION);
	191	ADD_DMI_ATTR(product_serial, DMI_PRODUCT_SERIAL);
	192	ADD_DMI_ATTR(product_uuid, DMI_PRODUCT_UUID);
	193	ADD_DMI_ATTR(board_vendor, DMI_BOARD_VENDOR);
	194	ADD_DMI_ATTR(board_name, DMI_BOARD_NAME);
	195	ADD_DMI_ATTR(board_version, DMI_BOARD_VERSION);
	196	ADD_DMI_ATTR(board_serial, DMI_BOARD_SERIAL);
	197	ADD_DMI_ATTR(board_asset_tag, DMI_BOARD_ASSET_TAG);
	198	ADD_DMI_ATTR(chassis_vendor, DMI_CHASSIS_VENDOR);
	199	ADD_DMI_ATTR(chassis_type, DMI_CHASSIS_TYPE);
	200	ADD_DMI_ATTR(chassis_version, DMI_CHASSIS_VERSION);
	201	ADD_DMI_ATTR(chassis_serial, DMI_CHASSIS_SERIAL);
	202	ADD_DMI_ATTR(chassis_asset_tag, DMI_CHASSIS_ASSET_TAG);
	203	sys_dmi_attributes[i++] = &sys_dmi_modalias_attr.attr;
ce8c628a JD	204	}
	205
	206	static int __init dmi_id_init(void)
	207	{
	208	int ret;
	209
	210	if (!dmi_available)
	211	return -ENODEV;
	212
	213	dmi_id_init_attr_table();
4f5c791a LP	214
	215	ret = class_register(&dmi_class);
	216	if (ret)
	217	return ret;
	218
	219	dmi_dev = kzalloc(sizeof(*dmi_dev), GFP_KERNEL);
	220	if (!dmi_dev) {
	221	ret = -ENOMEM;
	222	goto fail_class_unregister;
	223	}
	224
	225	dmi_dev->class = &dmi_class;
6ff4dd36	226	dev_set_name(dmi_dev, "id");
4f5c791a LP	227	dmi_dev->groups = sys_dmi_attribute_groups;
	228
	229	ret = device_register(dmi_dev);
	230	if (ret)
	231	goto fail_class_unregister;
	232
	233	return 0;
	234
	235	fail_class_unregister:
	236
	237	class_unregister(&dmi_class);
	238
	239	return ret;
	240	}
	241
	242	arch_initcall(dmi_id_init);