iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] dmi: add onboard devices discovery

Browse Source 
This patch adds onboard devices and IPMI BMC discovery into DMI scan code.
Drivers can use dmi_find_device() function to search for devices by type and
name.

Signed-off-by: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrey Panin 2005-09-06 15:18:29 -07:00 committed by Linus Torvalds
parent c3c7120d55
commit ebad6a4230
2 changed files with 123 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

102
arch/i386/kernel/dmi_scan.c
View File

@ -6,13 +6,6 @@
#include <linux/bootmem.h>
struct dmi_header {
u8 type;
u8 length;
u16 handle;
};
static char * __init dmi_string(struct dmi_header *dm, u8 s)
{
u8 *bp = ((u8 *) dm) + dm->length;
@ -88,6 +81,7 @@ static int __init dmi_checksum(u8 *buf)
}
static char *dmi_ident[DMI_STRING_MAX];
static LIST_HEAD(dmi_devices);
/*
* Save a DMI string
@ -106,6 +100,58 @@ static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
dmi_ident[slot] = p;
}
static void __init dmi_save_devices(struct dmi_header *dm)
{
int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
struct dmi_device *dev;
for (i = 0; i < count; i++) {
char *d = ((char *) dm) + (i * 2);
/* Skip disabled device */
if ((*d & 0x80) == 0)
continue;
dev = alloc_bootmem(sizeof(*dev));
if (!dev) {
printk(KERN_ERR "dmi_save_devices: out of memory.\n");
break;
}
dev->type = *d++ & 0x7f;
dev->name = dmi_string(dm, *d);
dev->device_data = NULL;
list_add(&dev->list, &dmi_devices);
}
}
static void __init dmi_save_ipmi_device(struct dmi_header *dm)
{
struct dmi_device *dev;
void * data;
data = alloc_bootmem(dm->length);
if (data == NULL) {
printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
return;
}
memcpy(data, dm, dm->length);
dev = alloc_bootmem(sizeof(*dev));
if (!dev) {
printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
return;
}
dev->type = DMI_DEV_TYPE_IPMI;
dev->name = "IPMI controller";
dev->device_data = data;
list_add(&dev->list, &dmi_devices);
}
/*
* Process a DMI table entry. Right now all we care about are the BIOS
* and machine entries. For 2.5 we should pull the smbus controller info
@ -113,25 +159,28 @@ static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
*/
static void __init dmi_decode(struct dmi_header *dm)
{
u8 *data __attribute__((__unused__)) = (u8 *)dm;
switch(dm->type) {
case 0:
case 0: /* BIOS Information */
dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
dmi_save_ident(dm, DMI_BIOS_DATE, 8);
break;
case 1:
case 1: /* System Information */
dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
break;
case 2:
case 2: /* Base Board Information */
dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
dmi_save_ident(dm, DMI_BOARD_NAME, 5);
dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
break;
case 10: /* Onboard Devices Information */
dmi_save_devices(dm);
break;
case 38: /* IPMI Device Information */
dmi_save_ipmi_device(dm);
}
}
@ -221,3 +270,32 @@ char *dmi_get_system_info(int field)
return dmi_ident[field];
}
EXPORT_SYMBOL(dmi_get_system_info);
/**
* dmi_find_device - find onboard device by type/name
* @type: device type or %DMI_DEV_TYPE_ANY to match all device types
* @desc: device name string or %NULL to match all
* @from: previous device found in search, or %NULL for new search.
*
* Iterates through the list of known onboard devices. If a device is
* found with a matching @vendor and @device, a pointer to its device
* structure is returned. Otherwise, %NULL is returned.
* A new search is initiated by passing %NULL to the @from argument.
* If @from is not %NULL, searches continue from next device.
*/
struct dmi_device * dmi_find_device(int type, const char *name,
struct dmi_device *from)
{
struct list_head *d, *head = from ? &from->list : &dmi_devices;
for(d = head->next; d != &dmi_devices; d = d->next) {
struct dmi_device *dev = list_entry(d, struct dmi_device, list);
if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
((name == NULL) || (strcmp(dev->name, name) == 0)))
return dev;
}
return NULL;
}
EXPORT_SYMBOL(dmi_find_device);

36
include/linux/dmi.h
View File

@ -1,6 +1,8 @@
#ifndef __DMI_H__
#define __DMI_H__
#include <linux/list.h>
enum dmi_field {
DMI_NONE,
DMI_BIOS_VENDOR,
@ -16,6 +18,24 @@ enum dmi_field {
DMI_STRING_MAX,
};
enum dmi_device_type {
DMI_DEV_TYPE_ANY = 0,
DMI_DEV_TYPE_OTHER,
DMI_DEV_TYPE_UNKNOWN,
DMI_DEV_TYPE_VIDEO,
DMI_DEV_TYPE_SCSI,
DMI_DEV_TYPE_ETHERNET,
DMI_DEV_TYPE_TOKENRING,
DMI_DEV_TYPE_SOUND,
DMI_DEV_TYPE_IPMI = -1
};
struct dmi_header {
u8 type;
u8 length;
u16 handle;
};
/*
* DMI callbacks for problem boards
*/
@ -26,22 +46,32 @@ struct dmi_strmatch {
struct dmi_system_id {
int (*callback)(struct dmi_system_id *);
char *ident;
const char *ident;
struct dmi_strmatch matches[4];
void *driver_data;
};
#define DMI_MATCH(a,b) { a, b }
#define DMI_MATCH(a, b) { a, b }
struct dmi_device {
struct list_head list;
int type;
const char *name;
void *device_data; /* Type specific data */
};
#if defined(CONFIG_X86) && !defined(CONFIG_X86_64)
extern int dmi_check_system(struct dmi_system_id *list);
extern char * dmi_get_system_info(int field);
extern struct dmi_device * dmi_find_device(int type, const char *name,
struct dmi_device *from);
#else
static inline int dmi_check_system(struct dmi_system_id *list) { return 0; }
static inline char * dmi_get_system_info(int field) { return NULL; }
static struct dmi_device * dmi_find_device(int type, const char *name,
struct dmi_device *from) { return NULL; }
#endif