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authorAndrey Panin <pazke@donpac.ru>2005-09-06 15:18:29 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:44 -0700
commitebad6a4230bdb5927495e28bc7837f515bf667a7 (patch)
tree373339d76d8424dd749957847b6d83707e65e016 /arch
parentc3c7120d552989be94c9137989be5abb6da8954f (diff)
downloadlinux-sh-ebad6a4230bdb5927495e28bc7837f515bf667a7.tar.gz
[PATCH] dmi: add onboard devices discovery
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/dmi_scan.c102
1 files changed, 90 insertions, 12 deletions
diff --git a/arch/i386/kernel/dmi_scan.c b/arch/i386/kernel/dmi_scan.c
index ae1a1aed2fc0..c4a73855e38c 100644
--- a/arch/i386/kernel/dmi_scan.c
+++ b/arch/i386/kernel/dmi_scan.c
@@ -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);