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This section described the WDC types and preprocessor definitions defined inthe WinDriver/include/wdc_defs.h header file.

WDC device ID information union (used for PCI and PCMCIA devices).
FieldTypeDescription
pciIdWD_PCI_IDPCI device ID information structure [B.5.6]
pcmciaId WD_PCMCIA_IDPCMCIA device ID information structure [B.5.7]
PCI/PCMCIA/ISA device memory or I/O address space information structure.
FieldTypeDescription
dwAddrSpaceDWORDThe address space number
fIsMemoryBOOL• TRUE: memory address space.
• FALSE: I/O address space.
dwItemIndexDWORDThe index of the WD_ITEMS structure [B.5.10] for the addressspace, which is retrieved and stored by WDC_xxxDeviceOpen() inthe cardReg.Card.Item array of the relevant WDC deviceinformation structure [B.4.3]
dwBytesDWORDThe address space's size (in bytes)
kptAddrKPTRThe kernel-mode mapping of the address space's physical base address.
This address is used by the WDC API for accessing a memory or I/O regionusing the low-level WD_Transfer() orWD_MultiTransfer() APIs (described in the WinDriver PCI Low-Level API Reference),or when accessing memory address directly in the kernel.
dwUserDirectMemAddrUPTRThe user-mode mapping of a memory address space's physical baseaddress.
This address is used for accessing memory addresses directly from the usermode
PCI/PCMCIA/ISA device information structure.
The WDC_xxxDeviceOpen() functions (PCI [B.3.10] /PCMCIA [B.3.11] / ISA [B.3.12]) allocate and return device structures of this type.
FieldTypeDescription
idWDC_ID_UDevice ID information union (relevant for PCI and PCMCIA devices) –see [B.4.1]
slotWDC_SLOT_UDevice location information structure – see description ofWDC_SLOT_U in Section B.3.1.9
dwNumAddrSpacesDWORDNumber of address spaces found on the device
pAddrDescWDC_ADDR_DESC*Array of memory and I/IO address spaces information structures [B.4.2]
cardRegWD_CARD_REGISTERWinDriver device resources information structure, returned by the low-levelWD_CardRegister() function (see the WinDriver PCI Low-Level API Reference), whichis called by the WDC_xxxDeviceOpen() functions
kerPlugWD_KERNEL_PLUGINKernel PlugIn driver information structure [B.7.1].
This structure is filled by the functions used to open a handle to a KernelPlugIn for a WDC_DEVICE [12.4] –either WDC_KernelPlugInOpen() [B.3.17], or one of theWDC_xxxDeviceOpen() functions (PCI [B.3.10] /PCMCIA [B.3.11] / ISA [B.3.12]) when called with the name of a Kernel PlugIn driver– and is maintained by the WDC library.
If no Kernel PlugIn handle was opened for the device, this structure is notused.
IntWD_INTERRUPTInterrupt information structure.
This structure is filled by the WDC_xxxDeviceOpen() functionsfor devices that have interrupts, and is maintained by the WDC library.
hIntThreadDWORDHandle to the interrupt thread that is spawn when interrupts areenabled.
This handle is passed by WDC to the low-level WinDriver interrupt APIs. Whenusing the WDC API you do not need to access this handle directly.
EventWD_EVENTWinDriver Plug-and-Play and power management events information structure –see EventRegister() description in the WinDriver PCI Low-Level API Reference fordetails.
hEventHANDLEHandle used by the WinDriver EventRegister() /EventUnregister() functions (see the WinDriver PCI Low-Level API Reference)
When using the WDC API you do not need to access this handle directly.
pCtxPVOIDDevice context information.
This information is received as a parameter by theWDC_xxxDeviceOpen() functions and stored in the devicestructure for future use by the calling application (optional)
Pointer to a WDC_DEVICE structure [B.4.3].
Purpose
Utility macro that returns a pointer that can be used for direct access to aspecified memory address space from the context of the calling process.
Parameters
Description
NameDescription
pAddrDescPointer to a WDC memory address space information structure [B.4.2]
When called from the user mode, returns the user-mode mapping of the physicalmemory address (pAddrDesc->dwUserDirectMemAddr);
When called from the kernel mode, returns the kernel-mode mapping of thephysical memory address (pAddrDesc->kptAddr).
The returned pointer can be used for accessing the memory directly from theuser mode or kernel mode, respectively.
Purpose
Utility macro that checks if a given address space is a memory or I/O addressspace.
Parameters
Description
NameDescription
pAddrDescPointer to a WDC memory address space information structure [B.4.2]
Returns pAddrDesc->fIsMemory, which is set to TRUEfor a memory address space and to FALSE otherwise.
Purpose
Utility macro that retrieves a WDC address space information structure(WDC_ADDR_DESC [B.4.2]), which complies to the specified address spacenumber.
Parameters
NameTypeInput/Output
pDevPWDC_DEVICEInput
dwAddrSpaceDWORDInput
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
dwAddrSpaceAddress space number
Returns a pointer to the device's address information structure(WDC_ADDR_DESC [B.4.2]) for the specified address space number –pDev->pAddrDesc[dwAddrSpace].
Purpose
Utility macro for retrieving the value of a WDC device'sdwEnabledIntTypeWD_INTERRUPT field. This field isupdated by WDC_IntEnable() [B.3.46] to indicate the interrupt type enabledfor the device, as detailed in the description of the macro's return valuebelow.
Parameters
Description
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
Returns the interrupt type enabled for the device:
INTERRUPT_MESSAGE_X: Extended Message-Signaled Interrupts (MSI-X).
INTERRUPT_MESSAGE: Message-Signaled Interrupts (MSI).
INTERRUPT_LEVEL_SENSITIVE: Legacy level-sensitiveinterrupts.
INTERRUPT_LATCHED: Legacy edge-triggered interrupts.
The value of this flag is zero and it is applicable only when no otherinterrupt flag is set.
The Windows and Mac OS X APIs do notdistinguish between MSI and MSI-X; therefore, on these OSs the WinDriverfunctions set the INTERRUPT_MESSAGE flag for both MSI andMSI-X.
Call this macro only after calling WDC_IntEnable() [B.3.46] to enableinterrupts on your PCI card.
This macro is normally relevant only in the case of PCI devices thatsupport more than one type of interrupt.
You can pass the returned value to the WDC_INT_IS_MSI macro tocheck if MSI or MSI-X was enabled [B.4.10].
Purpose
Utility macro for retrieving the value of a WDC device's interrupt options,which indicate the types of interrupts supported by the device, as detailed inthe description of the macro's return value below.
Parameters
Description
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
Returns a bit-mask indicating the types of interrupts supported by the device:
INTERRUPT_MESSAGE_X: Extended Message-Signaled Interrupts (MSI-X).
INTERRUPT_MESSAGE: Message-Signaled Interrupts (MSI).
INTERRUPT_LEVEL_SENSITIVE: Legacy level-sensitiveinterrupts.
INTERRUPT_LATCHED: Legacy edge-triggered interrupts.
The value of this flag is zero and it is applicable only when no otherinterrupt flag is set.
Free Up Space Mac OsYou can pass the returned options to the WDC_INT_IS_MSI macroto check whether they include the INTERRUPT_MESSAGE (MSI)and/or INTERRUPT_MESSAGE_X (MSI-X) flags [B.4.10].
Purpose
Utility macro that checks whether a given interrupt type bit-mask contains theMessage-Signaled Interrupts (MSI) or Extended Message-Signaled Interrupts (MSI-X) interrupt type flags.
Parameters
Description
Return Value
Returns TRUE if the provided interrupt type bit-mask includes theINTERRUPT_MESSAGE (MSI) and/orINTERRUPT_MESSAGE_X (MSI-X) flags; otherwise returnsFALSE.
Purpose
Utility macro that retrieves the message data of the last received interruptfor the Message-Signaled Interrupts (MSI) / Extended Message-Signaled Interrupts (MSI-X) enabled for the device (onLinux, Mac OS X, and Windows Vista and higher).
Parameters
Spaceprototype Mac Os DownloadDescription
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
If MSI or MSI-X was enabled for the given device, the macro returns themessage data of the last message received for the device's interrupt; otherwisereturns zero.
Purpose

Field	Type	Description
pciId	WD_PCI_ID	PCI device ID information structure [B.5.6]
pcmciaId	WD_PCMCIA_ID	PCMCIA device ID information structure [B.5.7]

Field	Type	Description
dwAddrSpace	DWORD	The address space number
fIsMemory	BOOL	• `TRUE`: memory address space. • `FALSE`: I/O address space.
dwItemIndex	DWORD	The index of the `WD_ITEMS` structure [B.5.10] for the addressspace, which is retrieved and stored by `WDC_xxxDeviceOpen`() inthe `cardReg.Card.Item` array of the relevant WDC deviceinformation structure [B.4.3]
dwBytes	DWORD	The address space's size (in bytes)
kptAddr	KPTR	The kernel-mode mapping of the address space's physical base address. This address is used by the WDC API for accessing a memory or I/O regionusing the low-level `WD_Transfer`() or`WD_MultiTransfer`() APIs (described in the WinDriver PCI Low-Level API Reference),or when accessing memory address directly in the kernel.
dwUserDirectMemAddr	UPTR	The user-mode mapping of a memory address space's physical baseaddress. This address is used for accessing memory addresses directly from the usermode

Field	Type	Description
id	WDC_ID_U	Device ID information union (relevant for PCI and PCMCIA devices) –see [B.4.1]
slot	WDC_SLOT_U	Device location information structure – see description of`WDC_SLOT_U` in Section B.3.1.9
dwNumAddrSpaces	DWORD	Number of address spaces found on the device
pAddrDesc	WDC_ADDR_DESC*	Array of memory and I/IO address spaces information structures [B.4.2]
cardReg	WD_CARD_REGISTER	WinDriver device resources information structure, returned by the low-level`WD_CardRegister`() function (see the WinDriver PCI Low-Level API Reference), whichis called by the `WDC_xxxDeviceOpen`() functions
kerPlug	WD_KERNEL_PLUGIN	Kernel PlugIn driver information structure [B.7.1]. This structure is filled by the functions used to open a handle to a KernelPlugIn for a `WDC_DEVICE` [12.4] –either `WDC_KernelPlugInOpen`() [B.3.17], or one of the`WDC_xxxDeviceOpen`() functions (PCI [B.3.10] /PCMCIA [B.3.11] / ISA [B.3.12]) when called with the name of a Kernel PlugIn driver– and is maintained by the WDC library. If no Kernel PlugIn handle was opened for the device, this structure is notused.
Int	WD_INTERRUPT	Interrupt information structure. This structure is filled by the `WDC_xxxDeviceOpen`() functionsfor devices that have interrupts, and is maintained by the WDC library.
hIntThread	DWORD	Handle to the interrupt thread that is spawn when interrupts areenabled. This handle is passed by WDC to the low-level WinDriver interrupt APIs. Whenusing the WDC API you do not need to access this handle directly.
Event	WD_EVENT	WinDriver Plug-and-Play and power management events information structure –see `EventRegister`() description in the WinDriver PCI Low-Level API Reference fordetails.
hEvent	HANDLE	Handle used by the WinDriver `EventRegister`() /`EventUnregister`() functions (see the WinDriver PCI Low-Level API Reference) When using the WDC API you do not need to access this handle directly.
pCtx	PVOID	Device context information. This information is received as a parameter by the`WDC_xxxDeviceOpen`() functions and stored in the devicestructure for future use by the calling application (optional)

Name	Description
pAddrDesc	Pointer to a WDC memory address space information structure [B.4.2]

Name	Description
pAddrDesc	Pointer to a WDC memory address space information structure [B.4.2]

Name	Type	Input/Output
pDev	PWDC_DEVICE	Input
dwAddrSpace	DWORD	Input

Name	Description
pDev	Pointer to a WDC device information structure [B.4.4]
dwAddrSpace	Address space number

Name	Description
pDev	Pointer to a WDC device information structure [B.4.4]

Name	Description
pDev	Pointer to a WDC device information structure [B.4.4]

Name	Description
pDev	Pointer to a WDC device information structure [B.4.4]

WDC device ID information union (used for PCI and PCMCIA devices).
FieldTypeDescription
pciIdWD_PCI_IDPCI device ID information structure [B.5.6]
pcmciaId WD_PCMCIA_IDPCMCIA device ID information structure [B.5.7]
PCI/PCMCIA/ISA device memory or I/O address space information structure.
FieldTypeDescription
dwAddrSpaceDWORDThe address space number
fIsMemoryBOOL• TRUE: memory address space.
• FALSE: I/O address space.
dwItemIndexDWORDThe index of the WD_ITEMS structure [B.5.10] for the addressspace, which is retrieved and stored by WDC_xxxDeviceOpen() inthe cardReg.Card.Item array of the relevant WDC deviceinformation structure [B.4.3]
dwBytesDWORDThe address space's size (in bytes)
kptAddrKPTRThe kernel-mode mapping of the address space's physical base address.
This address is used by the WDC API for accessing a memory or I/O regionusing the low-level WD_Transfer() orWD_MultiTransfer() APIs (described in the WinDriver PCI Low-Level API Reference),or when accessing memory address directly in the kernel.
dwUserDirectMemAddrUPTRThe user-mode mapping of a memory address space's physical baseaddress.
This address is used for accessing memory addresses directly from the usermode
PCI/PCMCIA/ISA device information structure.
The WDC_xxxDeviceOpen() functions (PCI [B.3.10] /PCMCIA [B.3.11] / ISA [B.3.12]) allocate and return device structures of this type.
FieldTypeDescription
idWDC_ID_UDevice ID information union (relevant for PCI and PCMCIA devices) –see [B.4.1]
slotWDC_SLOT_UDevice location information structure – see description ofWDC_SLOT_U in Section B.3.1.9
dwNumAddrSpacesDWORDNumber of address spaces found on the device
pAddrDescWDC_ADDR_DESC*Array of memory and I/IO address spaces information structures [B.4.2]
cardRegWD_CARD_REGISTERWinDriver device resources information structure, returned by the low-levelWD_CardRegister() function (see the WinDriver PCI Low-Level API Reference), whichis called by the WDC_xxxDeviceOpen() functions
kerPlugWD_KERNEL_PLUGINKernel PlugIn driver information structure [B.7.1].
This structure is filled by the functions used to open a handle to a KernelPlugIn for a WDC_DEVICE [12.4] –either WDC_KernelPlugInOpen() [B.3.17], or one of theWDC_xxxDeviceOpen() functions (PCI [B.3.10] /PCMCIA [B.3.11] / ISA [B.3.12]) when called with the name of a Kernel PlugIn driver– and is maintained by the WDC library.
If no Kernel PlugIn handle was opened for the device, this structure is notused.
IntWD_INTERRUPTInterrupt information structure.
This structure is filled by the WDC_xxxDeviceOpen() functionsfor devices that have interrupts, and is maintained by the WDC library.
hIntThreadDWORDHandle to the interrupt thread that is spawn when interrupts areenabled.
This handle is passed by WDC to the low-level WinDriver interrupt APIs. Whenusing the WDC API you do not need to access this handle directly.
EventWD_EVENTWinDriver Plug-and-Play and power management events information structure –see EventRegister() description in the WinDriver PCI Low-Level API Reference fordetails.
hEventHANDLEHandle used by the WinDriver EventRegister() /EventUnregister() functions (see the WinDriver PCI Low-Level API Reference)
When using the WDC API you do not need to access this handle directly.
pCtxPVOIDDevice context information.
This information is received as a parameter by theWDC_xxxDeviceOpen() functions and stored in the devicestructure for future use by the calling application (optional)
Pointer to a WDC_DEVICE structure [B.4.3].
Purpose
Utility macro that returns a pointer that can be used for direct access to aspecified memory address space from the context of the calling process.
Parameters
Description
NameDescription
pAddrDescPointer to a WDC memory address space information structure [B.4.2]
When called from the user mode, returns the user-mode mapping of the physicalmemory address (pAddrDesc->dwUserDirectMemAddr);
When called from the kernel mode, returns the kernel-mode mapping of thephysical memory address (pAddrDesc->kptAddr).
The returned pointer can be used for accessing the memory directly from theuser mode or kernel mode, respectively.
Purpose
Utility macro that checks if a given address space is a memory or I/O addressspace.
Parameters
Description
NameDescription
pAddrDescPointer to a WDC memory address space information structure [B.4.2]
Returns pAddrDesc->fIsMemory, which is set to TRUEfor a memory address space and to FALSE otherwise.
Purpose
Utility macro that retrieves a WDC address space information structure(WDC_ADDR_DESC [B.4.2]), which complies to the specified address spacenumber.
Parameters
NameTypeInput/Output
pDevPWDC_DEVICEInput
dwAddrSpaceDWORDInput
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
dwAddrSpaceAddress space number
Returns a pointer to the device's address information structure(WDC_ADDR_DESC [B.4.2]) for the specified address space number –pDev->pAddrDesc[dwAddrSpace].
Purpose
Utility macro for retrieving the value of a WDC device'sdwEnabledIntTypeWD_INTERRUPT field. This field isupdated by WDC_IntEnable() [B.3.46] to indicate the interrupt type enabledfor the device, as detailed in the description of the macro's return valuebelow.
Parameters
Description
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
Returns the interrupt type enabled for the device:
INTERRUPT_MESSAGE_X: Extended Message-Signaled Interrupts (MSI-X).
INTERRUPT_MESSAGE: Message-Signaled Interrupts (MSI).
INTERRUPT_LEVEL_SENSITIVE: Legacy level-sensitiveinterrupts.
INTERRUPT_LATCHED: Legacy edge-triggered interrupts.
The value of this flag is zero and it is applicable only when no otherinterrupt flag is set.
The Windows and Mac OS X APIs do notdistinguish between MSI and MSI-X; therefore, on these OSs the WinDriverfunctions set the INTERRUPT_MESSAGE flag for both MSI andMSI-X.
Call this macro only after calling WDC_IntEnable() [B.3.46] to enableinterrupts on your PCI card.
This macro is normally relevant only in the case of PCI devices thatsupport more than one type of interrupt.
You can pass the returned value to the WDC_INT_IS_MSI macro tocheck if MSI or MSI-X was enabled [B.4.10].
Purpose
Utility macro for retrieving the value of a WDC device's interrupt options,which indicate the types of interrupts supported by the device, as detailed inthe description of the macro's return value below.
Parameters
Description
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
Returns a bit-mask indicating the types of interrupts supported by the device:
INTERRUPT_MESSAGE_X: Extended Message-Signaled Interrupts (MSI-X).
INTERRUPT_MESSAGE: Message-Signaled Interrupts (MSI).
INTERRUPT_LEVEL_SENSITIVE: Legacy level-sensitiveinterrupts.
INTERRUPT_LATCHED: Legacy edge-triggered interrupts.
The value of this flag is zero and it is applicable only when no otherinterrupt flag is set.
Free Up Space Mac OsYou can pass the returned options to the WDC_INT_IS_MSI macroto check whether they include the INTERRUPT_MESSAGE (MSI)and/or INTERRUPT_MESSAGE_X (MSI-X) flags [B.4.10].
Purpose
Utility macro that checks whether a given interrupt type bit-mask contains theMessage-Signaled Interrupts (MSI) or Extended Message-Signaled Interrupts (MSI-X) interrupt type flags.
Parameters
Description
Return Value
Returns TRUE if the provided interrupt type bit-mask includes theINTERRUPT_MESSAGE (MSI) and/orINTERRUPT_MESSAGE_X (MSI-X) flags; otherwise returnsFALSE.
Purpose
Utility macro that retrieves the message data of the last received interruptfor the Message-Signaled Interrupts (MSI) / Extended Message-Signaled Interrupts (MSI-X) enabled for the device (onLinux, Mac OS X, and Windows Vista and higher).
Parameters
Spaceprototype Mac Os DownloadDescription
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
If MSI or MSI-X was enabled for the given device, the macro returns themessage data of the last message received for the device's interrupt; otherwisereturns zero.
Purpose
Utility macro that checks whether a WDC device uses a Kernel PlugIn driver. Guitar of pampas mac os.
Parameters
Mac Os Desktop SpacesDescription
NameDescription
pDevPointer to a WDC device information structure [B.4.4]
Returns TRUE if the device uses a Kernel PlugIn driver; otherwisereturns FALSE.