2.4 WD_PciConfigDump()

PURPOSE

$\bullet$Reads/writes from/to the PCI configuration space of a selected PCI card or the extended configuration space of a selected PCI Express card (on Windows/Linux).

For Windows and Linux, all references to ''PCI'' in the description below also include PCI Express.

PROTOTYPE

DWORD WD_PciConfigDump(
    HANDLE hWD,
    WD_PCI_CONFIG_DUMP *pConfig);

PARAMETERS

Name	Type	Input/Output
$\bullet$hWD	HANDLE	Input
$\bullet$pConfig	WD_PCI_CONFIG_DUMP*
$\gg$pciSlot	WD_PCI_SLOT
$\diamond$dwBus	DWORD	Input
$\diamond$dwSlot	DWORD	Input
$\diamond$dwFunction	DWORD	Input
$\gg$pBuffer	PVOID	Input/Output
$\gg$dwOffset	DWORD	Input
$\gg$dwBytes	DWORD	Input
$\gg$fIsRead	DWORD	Input
$\gg$dwResult	DWORD	Output

DESCRIPTION

Name	Description
hWD	The handle to WinDriver's kernel-mode driver received from WD_Open() [5.2]
pConfig	Pointer to a PCI configuration space information structure:
pciSlot	PCI slot information structure:
pciSlot.dwBus	PCI bus number (0 based)
pciSlot.dwSlot	PCI slot number (0 based)
pciSlot.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: $\bullet$PCI_ACCESS_OK - read/write succeeded $\bullet$PCI_ACCESS_ERROR - read/write failed $\bullet$PCI_BAD_BUS - the specified bus does not exist $\bullet$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]);
}