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Add embedded Managed Object Format blob access to acpi_wmi(4).

Browse Source 
This blob is can be converted to human readable form by bmfdec.
(http://github.com/pali/bmfdec)

Differential Revision:	https://reviews.freebsd.org/D21529
This commit is contained in:
takawata 2019-09-06 10:12:05 +00:00
parent 3a2c285092
commit e24d7bc6d4
2 changed files with 54 additions and 1 deletions
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28
share/man/man4/acpi_wmi.4
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd November 22, 2011
.Dd Sep 5, 2019
.Dt ACPI_WMI 4
.Os
.Sh NAME
@ -56,6 +56,15 @@ information about GUIDs found in the system.
.It Pa /dev/wmistat%d
WMI status device.
.El
.Sh SYSCTLS
The following sysctl node is currently implemented:
.Bl -tag
.It Va dev.acpi_wmi.%d.bmof
Managed Object Format (MOF) blob.
You can obtain human readable output by bmf2mof in bmfdec tool.
(https://github.com/pali/bmfdec)
.El
.Sh EXAMPLES
.Bd -literal
# cat /dev/wmistat0
@ -72,6 +81,20 @@ GUID INST EXPE METH STR EVENT OID
{8232DE3D-663D-4327-A8F4-E293ADB9BF05} 0 NO NO NO NO BG
{8F1F6436-9F42-42C8-BADC-0E9424F20C9A} 0 NO NO NO NO BH
{8F1F6435-9F42-42C8-BADC-0E9424F20C9A} 0 NO NO NO NO BI
# sysctl -b dev.acpi_wmi.0.bmof |bmf2mof
[abstract]
class Lenovo_BIOSElement {
};
[WMI, Dynamic, Provider("WMIProv"), WmiExpense(1), Description("Bios Setting"),
GUID("{51F5230E-9677-46cd-A1CF-C0B23EE34DB7}"), Locale("MS\\0x409")]
class Lenovo_BiosSetting : Lenovo_BiosElement {
[key, read] String InstanceName;
[read] Boolean Active;
[WmiDataId(1), Description("BIOS setting")] String CurrentSetting;
};
...
.Ed
.Sh SEE ALSO
.Xr acpi 4
@ -92,5 +115,8 @@ Work has been inspired by the Linux acpi-wmi driver written by Carlos Corbacho.
See http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx for
the specification of ACPI-WMI.
.Pp
MOF part has been inspired by the Linux wmi-bmof driver
written by Andy Lutomirski.
.Pp
This manual page was written by
.An Michael Gmelin Aq Mt freebsd@grem.de .

27
sys/dev/acpi_support/acpi_wmi.c
View File

@ -62,6 +62,7 @@ ACPI_MODULE_NAME("ACPI_WMI");
#define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */
#define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */
#define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */
#define ACPI_WMI_BMOF_UUID "05901221-D566-11D1-B2F0-00A0C9062910"
/*
* acpi_wmi driver private structure
@ -74,6 +75,8 @@ struct acpi_wmi_softc {
struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */
pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */
int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */
char *mofbuf;
TAILQ_HEAD(wmi_info_list_head, wmi_info) wmi_info_list;
};
@ -274,6 +277,29 @@ acpi_wmi_attach(device_t dev)
}
ACPI_SERIAL_END(acpi_wmi);
if (acpi_wmi_provides_guid_string_method(dev, ACPI_WMI_BMOF_UUID)) {
ACPI_BUFFER out = { ACPI_ALLOCATE_BUFFER, NULL };
ACPI_OBJECT *obj;
device_printf(dev, "Embedded MOF found\n");
status = acpi_wmi_get_block_method(dev, ACPI_WMI_BMOF_UUID,
0, &out);
if (ACPI_SUCCESS(status)) {
obj = out.Pointer;
if (obj && obj->Type == ACPI_TYPE_BUFFER) {
SYSCTL_ADD_OPAQUE(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(
device_get_sysctl_tree(dev)),
OID_AUTO, "bmof",
CTLFLAG_RD | CTLFLAG_MPSAFE,
obj->Buffer.Pointer,
obj->Buffer.Length,
"A", "MOF Blob");
}
}
sc->mofbuf = out.Pointer;
}
if (ret == 0) {
bus_generic_probe(dev);
ret = bus_generic_attach(dev);
@ -321,6 +347,7 @@ acpi_wmi_detach(device_t dev)
sc->wmistat_open_pid = 0;
destroy_dev(sc->wmistat_dev_t);
ret = 0;
AcpiOsFree(sc->mofbuf);
}
ACPI_SERIAL_END(acpi_wmi);