2.4. WD_PciConfigDump()


	Chapter 2. WD_xxx PCI/PCMCIA/ISA Functions

Purpose

Reads/writes from/to the PCI configuration space of a selected PCI card or the extended configuration space of a selected PCI Express card.


	Access to the PCI Express extended configuration space is supported on target platforms that support such access (e.g., Windows and Linux). For such platforms, all PCI references in the following documentation include PCI Express as well.

Prototype

DWORD WD_PciConfigDump(
    HANDLE hWD,
    WD_PCI_CONFIG_DUMP *pConfig);

Parameters

Name	Type	Input/Output
hWD	HANDLE	Input
pConfig	WD_PCI_CONFIG_DUMP*
• pciSlot	WD_PCI_SLOT
* dwBus	DWORD	Input
* dwSlot	DWORD	Input
* dwFunction	DWORD	Input
• pBuffer	PVOID	Input/Output
• dwOffset	DWORD	Input
• dwBytes	DWORD	Input
• fIsRead	DWORD	Input
• dwResult	DWORD	Output

Description

Name	Description
hWD	Handle to WinDriver's kernel-mode driver as received from `WD_Open`() [5.2]
pConfig	Pointer to a PCI configuration space information structure:
• pciSlot	PCI slot information structure:
* dwBus	PCI bus number (0 based)
* dwSlot	PCI slot number (0 based)
* dwFunction	PCI function number (0 based)
• pBuffer	A pointer to the data that is read from the PCI configuration space (if `fIsRead` is `TRUE`) or a pointer to the data to write to the PCI configuration space (if `fIsRead` is `FALSE`)
• dwOffset	The offset of the specific register(s) in the PCI configuration space to read/write from/to
• dwBytes	Number of bytes to read/write
• fIsRead	If `TRUE` — read from the PCI configuration space; If `FALSE` — write to the PCI configuration space
• dwResult	Result of the PCI configuration space read/write. Can be any of the following `PCI_ACCESS_RESULT` enumeration values: • `PCI_ACCESS_OK` — read/write succeeded • `PCI_ACCESS_ERROR` — read/write failed • `PCI_BAD_BUS` — the specified bus does not exist • `PCI_BAD_SLOT` — the specified slot or function does not exist

Return Value

Returns WD_STATUS_SUCCESS (0) on success, or an appropriate error code otherwise [A].

Example

WD_PCI_CONFIG_DUMP pciConfig;
DWORD dwStatus;
WORD aBuffer[2];

BZERO(pciConfig);
pciConfig.pciSlot.dwBus = 0;
pciConfig.pciSlot.dwSlot = 3;
pciConfig.pciSlot.dwFunction = 0;
pciConfig.pBuffer = aBuffer;
pciConfig.dwOffset = 0;
pciConfig.dwBytes = sizeof(aBuffer);
pciConfig.fIsRead = TRUE;

dwStatus = WD_PciConfigDump(hWD, &pciConfig);
if (dwStatus)
{
    printf("WD_PciConfigDump failed: %s\n", Stat2Str(dwStatus));
}
else
{
    printf("Card in Bus 0, Slot 3, Funcion 0 has Vendor ID %x "
        "Device ID %x\n", aBuffer[0], aBuffer[1]);
}


2.3. WD_PciGetCardInfo()		2.5. WD_PcmciaScanCards()