CIM_DMA class
The CIM_DMA class represents computer architecture direct memory access (DMA).
Important
The DMTF (Distributed Management Task Force) CIM (Common Information Model) classes are the parent classes upon which WMI classes are built. WMI currently supports only the CIM 2.x version schemas.
The following syntax is simplified from Managed Object Format (MOF) code and includes all inherited properties. Properties are listed in alphabetic order, not MOF order.
Syntax
[Abstract, UUID("{8502C523-5FBB-11D2-AAC1-006008C78BC7}"), AMENDMENT]
class CIM_DMA : CIM_SystemResource
{
uint16 AddressSize;
uint16 Availability;
boolean BurstMode;
uint16 ByteMode;
string Caption;
uint16 ChannelTiming;
string CreationClassName;
string CSCreationClassName;
string CSName;
string Description;
uint32 DMAChannel;
datetime InstallDate;
uint32 MaxTransferSize;
string Name;
string Status;
uint16 TransferWidths[];
uint16 TypeCTiming;
uint16 WordMode;
};
Members
The CIM_DMA class has these types of members:
Properties
The CIM_DMA class has these properties.
-
AddressSize
-
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.3"), Units ("bits")
DMA channel address size, in bits. Permissible values are 8, 16, 32, and 64. If unknown, enter 0.
-
-
(0)
-
(8)
-
(16)
-
(32)
-
(64)
Availability
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|DMA|001.2")
Availability of the DMA.
Other (1)
Unknown (2)
Unknown.
Available (3)
Available.
In Use/Not Available (4)
In use (not available).
In Use and Available/Shareable (5)
In use, but available (sharable).
BurstMode
-
Data type: boolean
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|DMA|001.3")
If TRUE, the DMA channel supports burst mode.
ByteMode
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.7")
Indicates whether DMA can execute in count-by-byte mode.
Other (1)
Other.
Unknown (2)
Unknown.
Not execute in 'count by byte' mode (3)
Cannot execute in count-by-byte mode.
Execute in 'count by byte' mode (4)
Able to execute in count-by-byte mode.
Caption
-
Data type: string
-
Access type: Read-only
-
Qualifiers: MaxLen (64), DisplayName ("Caption")
Short textual description of the object.
This property is inherited from CIM_ManagedSystemElement.
ChannelTiming
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.9")
DMA channel timing.
Other (1)
Other.
Unknown (2)
Unknown.
ISA Compatible (3)
ISA-compatible.
Type A (4)
Type A.
Type B (5)
Type B.
Type F (6)
Type F.
CreationClassName
Name of the class or subclass used in the creation of an instance. When used with other key properties of the class, this property allows all instances of the class and its subclasses to be uniquely identified.
CSCreationClassName
-
Data type: string
-
Access type: Read-only
-
Qualifiers: Propagated ("CIM_ComputerSystem.CreationClassName"), MaxLen (256), CIM_Key
Scoping computer system's creation class name.
CSName
-
Data type: string
-
Access type: Read-only
-
Qualifiers: Propagated ("CIM_ComputerSystem.Name"), CIM_Key, MaxLen (256)
Scoping computer system's name.
Description
-
Data type: string
-
Access type: Read-only
-
Qualifiers: DisplayName ("Description")
Textual description of the object.
This property is inherited from CIM_ManagedSystemElement.
DMAChannel
-
Data type: uint32
-
Access type: Read-only
-
Qualifiers: Key, MappingStrings ("MIF.DMTF|DMA|001.1")
DMA channel number. This number is part of the object's key value.
InstallDate
-
Data type: datetime
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|ComponentID|001.5"), DisplayName ("Install Date")
Date and time the object was installed. This property does not need a value to indicate that the object is installed.
This property is inherited from CIM_ManagedSystemElement.
MaxTransferSize
-
Data type: uint32
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.4"), Units ("bytes")
Maximum number of bytes that can be transferred by this DMA channel. If unknown, enter 0 (zero).
Name
-
Data type: string
-
Access type: Read-only
-
Qualifiers: DisplayName ("Name")
Label by which the object is known. When subclassed, this property can be overridden to be a key property.
This property is inherited from CIM_ManagedSystemElement.
Status
-
Data type: string
-
Access type: Read-only
-
Qualifiers: MaxLen (10), DisplayName ("Status")
Indicates the current status of the object.
This property is inherited from CIM_ManagedSystemElement.
Values include the following:
OK ("OK")
Error ("Error")
Degraded ("Degraded")
Unknown ("Unknown")
Pred Fail ("Pred Fail")
Starting ("Starting")
Stopping ("Stopping")
Service ("Service")
Stressed ("Stressed")
NonRecover ("NonRecover")
No Contact ("No Contact")
Lost Comm ("Lost Comm")
TransferWidths
-
Data type: uint16 array
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.2"), Units ("bits")
Array that indicates all of the transfer widths, in bits, supported by this DMA channel. Permissible values are 8, 16, 32, 64, and 128 bits. If unknown, enter 0 (zero).
(0)
(8)
(16)
(32)
(64)
(128)
TypeCTiming
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.10")
Indicates whether Type C (burst) timing is supported.
Other (1)
Other.
Unknown (2)
Unknown.
ISA Compatible (3)
ISA-compatible.
Not Supported (4)
Not supported.
Supported (5)
Supported.
WordMode
-
Data type: uint16
-
Access type: Read-only
-
Qualifiers: MappingStrings ("MIF.DMTF|System Resource DMA Info|001.8")
Indicates whether DMA can execute in count-by-word mode.
Other (1)
Other.
Unknown (2)
Unknown.
Not execute in 'count by word' mode (3)
Cannot execute in count-by-word mode.
Execute in 'count by word' mode (4)
Able to execute in count-by-word mode.
Remarks
The CIM_DMA class is derived from CIM_SystemResource.
WMI does not implement this class. For classes derived from CIM_DMA, see Win32 Classes.
This documentation is derived from the CIM class descriptions published by the DMTF. Microsoft may have made changes to correct minor errors, conform to Microsoft SDK documentation standards, or provide more information.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista |
| Minimum supported server |
Windows Server 2008 |
| Namespace |
Root\CIMV2 |
| MOF |
|
| DLL |
|
See also
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