linux-toradex.git/include/linux/dmi.h, branch v2.6.27.31

x86: configurable DMI scanning code

2008-04-28T15:58:30+00:00

Turn CONFIG_DMI into a selectable option if EMBEDDED is defined, in
order to be able to remove the DMI table scanning code if it's not
needed, and then reduce the kernel code size.

With CONFIG_DMI (i.e before) :

   text    data     bss     dec     hex filename
1076076  128656   98304 1303036  13e1fc vmlinux

Without CONFIG_DMI (i.e after) :

   text    data     bss     dec     hex filename
1068092  126308   98304 1292704  13b9a0 vmlinux

Result:

   text    data     bss     dec     hex filename
  -7984   -2348       0  -10332   -285c vmlinux

The new option appears in "Processor type and features", only when
CONFIG_EMBEDDED is defined.

This patch is part of the Linux Tiny project, and is based on previous work
done by Matt Mackall .

Signed-off-by: Thomas Petazzoni 
Acked-by: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Anvin" 
Signed-off-by: Matt Mackall 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SMBIOS/DMI: add type 41 = Onboard Devices Extended Information

2008-02-08T17:22:37+00:00

From version 2.6 of the SMBIOS standard, type 10 (On Board Devices
Information) becomes obsolete.  The reason for this is that no further
fields can be added to this structure without adversely affecting existing
software's ability to properly parse the data.

Therefore type 41 (Onboard Devices Extended Information) was added.
The structure is as follows:

struct smbios_type_41 {
	u8 type;
	u8 length;
	u16 handle;
	u8 reference_designation_string;
	u8 device_type;		/* same device type as in type 10 */
	u8 device_type_instance;
	u16 segment_group_number;
	u8 bus_number;
	u8 device_function_number;
};

For more info: http://www.dmtf.org/standards/smbios

Signed-off-by: Wim Van Sebroeck 
Cc: Jean Delvare 
Cc: Len Brown 
Cc: Jeff Garzik 
Cc: Tejun Heo 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dmi: Let drivers walk the DMI table

2008-02-08T01:39:40+00:00

Let drivers walk the DMI table for their own needs. Some drivers need
data stored in OEM-specific DMI records for proper operation.

Signed-off-by: Jean Delvare 
Signed-off-by: Mark M. Hoffman

DMI: remove duplicate helper routine

2008-02-03T22:37:02+00:00

Use existing dmi_get_system_info(),
Delete duplicate dmi_get_slot()

Spotted-by: Wim Van Sebroeck 
Signed-off-by: Len Brown

DMI: create dmi_get_slot()

2008-01-24T02:23:13+00:00

This simply allows other sub-systems (such as ACPI)
to access and print out slots in static dmi_ident[].

Signed-off-by: Len Brown

DMI: move dmi_available declaration to linux/dmi.h

2008-01-24T02:22:21+00:00

Signed-off-by: Len Brown

drivers/firmware: const-ify DMI API and internals

2007-10-10T00:22:20+00:00

Three main sets of changes:

1) dmi_get_system_info() return value should have been marked const,
   since callers should not be changing that data.

2) const-ify DMI internals, since DMI firmware tables should,
   whenever possible, be marked const to ensure we never ever write to
   that data area.

3) const-ify DMI API, to enable marking tables const where possible
   in low-level drivers.

And if we're really lucky, this might enable some additional
optimizations on the part of the compiler.

The bulk of the changes are #2 and #3, which are interrelated.  #1 could
have been a separate patch, but it was so small compared to the others,
it was easier to roll it into this changeset.

Signed-off-by: Jeff Garzik

DMI-based module autoloading

2007-07-11T23:09:00+00:00

The patch below adds DMI/SMBIOS based module autoloading to the Linux
kernel. The idea is to load laptop drivers automatically (and other
drivers which cannot be autoloaded otherwise), based on the DMI system
identification information of the BIOS.

Right now most distros manually try to load all available laptop
drivers on bootup in the hope that at least one of them loads
successfully. This patch does away with all that, and uses udev to
automatically load matching drivers on the right machines.

Basically the patch just exports the DMI information that has been
parsed by the kernel anyway to userspace via a sysfs device
/sys/class/dmi/id and makes sure that proper modalias attributes are
available. Besides adding the "modalias" attribute it also adds
attributes for a few other DMI fields which might be useful for
writing udev rules.

This patch is not an attempt to export the entire DMI/SMBIOS data to
userspace. We already have "dmidecode" which parses the complete DMI
info from userspace. The purpose of this patch is machine model
identification and good udev integration.

To take advantage of DMI based module autoloading, a driver should
export one or more MODULE_ALIAS fields similar to these:

MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*");
MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");

These lines are specific to my msi-laptop.c driver. They are basically
just a concatenation of a few carefully selected DMI fields with all
potentially bad characters stripped.

Besides laptop drivers, modules like "hdaps", the i2c modules
and the hwmon modules are good candidates for "dmi:" MODULE_ALIAS
lines.

Besides merely exporting the DMI data via sysfs the patch adds
support for a few more DMI fields. Especially the CHASSIS fields are
very useful to identify different laptop modules. The patch also adds
working MODULE_ALIAS lines to my msi-laptop.c driver.

I'd like to thank Kay Sievers for helping me to clean up this patch
for posting it on lkml.

Patch is against Linus' current GIT HEAD. Should probably apply to
older kernels as well without modification.

Signed-off-by: Lennart Poettering
Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman

[PATCH] i386: Disable nmi watchdog on all ThinkPads

2006-10-21T16:37:02+00:00

Even newer Thinkpads have bugs in SMM code that causes hangs with
NMI watchdog.

Signed-off-by: Andi Kleen

[PATCH] DMI: Decode and save OEM String information

2006-09-29T16:18:09+00:00

This teaches dmi_decode() how to decode and save OEM Strings (type 11) DMI
information, which is currently discarded silently.  Existing code using
DMI is not affected.  Follows the "System Management BIOS (SMBIOS)
Specification" (http://www.dmtf.org/standards/smbios), and also the
userspace dmidecode.c code.

OEM Strings are the only safe way to identify some hardware, e.g., the
ThinkPad embedded controller used by the soon-to-be-submitted tp_smapi
driver.  This will also let us eliminate the long whitelist in the mainline
hdaps driver (in a future patch).

Signed-off-by: Shem Multinymous 
Cc: Bjorn Helgaas 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds