linux-kernel - Re: [PATCH 15/16] platform/x86: wmi-mof: New driver to expose embedded WMI MOF metadata

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Date:   Mon, 5 Jun 2017 15:39:44 -0700
From:   Andy Lutomirski <luto@...capital.net>
To:     Pali Rohár <pali.rohar@...il.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        platform-driver-x86@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Mario Limonciello <mario_limonciello@...l.com>,
        Rafael Wysocki <rjw@...ysocki.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH 15/16] platform/x86: wmi-mof: New driver to expose
 embedded WMI MOF metadata

On Mon, Jun 5, 2017 at 3:19 PM, Pali Rohár <pali.rohar@...il.com> wrote:
> On Tuesday 06 June 2017 00:14:56 Darren Hart wrote:
>> On Sat, May 27, 2017 at 01:14:15PM +0200, Pali Rohár wrote:
>> > > metadata. I think that Samba has tools to interpret it, but there
>> > > is currently no interface to get the data in the first place.
>> >
>> > No, there is no non-ms-windows tool for interpreting those binary
>> > MOF (BMF) data yet.
>>
>> Good point. Updated.
>
> You are too late :-) Now there is my at https://github.com/pali/bmfdec
> See my email "Binary MOF buffer in WMI is finally decoded!".
>

It comes out like this on my laptop.  I don't know enough about MOF to
know what we're supposed to do with this, but I suspect it at least
gives us the sizes of buffers that we should be passing to the various
methods.

class WMIEvent : __ExtrinsicEvent {
};

[WMI, Locale("MS\0x409"), Description("QDATA"),
guid("{ABBC0F60-8EA1-11d1-00A0-C90629100000}")]
class QDat {
  [WmiDataId(1), read, write, Description("qdata")] uint8 Bytes[128];
};

[WMI, Dynamic, Provider("WmiProv"), Locale("MS\0x409"),
Description("BIOS WMI Query"),
guid("{8D9DDCBC-A997-11DA-B012-B622A1EF5492}")]
class WMI_Query {
  [key, read] String InstanceName;
  [read] Boolean Active;
  [WmiDataId(1), read, write, Description("BIOS WMI info")] QDat QDATA;
};

[WMI, Locale("MS\0x409"), Description("Data"),
guid("{a3776ce0-1e88-11db-a98b-0800200c9a66}")]
class BDat {
  [WmiDataId(1), read, write, Description("data")] uint8 Bytes[4096];
};

[WMI, Dynamic, Provider("WmiProv"), Locale("MS\0x409"),
Description("Interface"),
guid("{A80593CE-A997-11DA-B012-B622A1EF5492}")]
class BFn {
  [key, read] String InstanceName;
  [read] Boolean Active;

  [WmiMethodId(1), Implemented, read, write, Description("Do BFn")]
void DoBFn([in, Description("Fn buf"), ID(0)] BDat Data, [out,
Description("Fn buf"), ID(0)] BDat Data);
};

[WMI, Dynamic, Provider("WmiProv"), Locale("MS\0x409"),
Description("Event"), guid("{9DBB5994-A997-11DA-B012-B622A1EF5492}")]
class BIOSEvent : WmiEvent {
  [key, read] String InstanceName;
  [read] Boolean Active;
  [WmiDataId(1), read, write, Description("Ev buf")] QDat Data;
};