2.3. WD_PciGetCardInfo()


	Chapter 2. WD_xxx PCI/PCMCIA/ISA Functions

Purpose

Retrieves PCI device's resource information (i.e., Memory ranges, I/O ranges, Interrupt lines).

Prototype

DWORD WD_PciGetCardInfo(
    HANDLE hWD,
    WD_PCI_CARD_INFO *pPciCard);

Parameters

Name	Type	Input/Output
hWD	HANDLE	Input
pPciCard	WD_PCI_CARD_INFO*	Input
• pciSlot	WD_PCI_SLOT	Input
* dwBus	DWORD	Input
* dwSlot	DWORD	Input
* dwFunction	DWORD	Input
• Card	WD_CARD	Input
* dwItems	DWORD	Output
* Item	WD_ITEMS[WD_CARD_ITEMS]	Input
• item	DWORD	Output
• fNotSharable	DWORD	Output
• dwReserved	DWORD	N/A
• dwOptions	DWORD	N/A
• I	union	Input
* Mem	struct	Input
• dwPhysicalAddr	DWORD	Output
• dwBytes	DWORD	Output
• dwTransAddr	KPTR	N/A
• dwUserDirectAddr	UPTR	N/A
• dwCpuPhysicalAddr	DWORD	N/A
• dwBar	DWORD	Output
* IO	struct	Input
• dwAddr	KPTR	Output
• dwBytes	DWORD	Output
• dwBar	DWORD	Output
* Int	struct	Input
• dwInterrupt	DWORD	Output
• dwOptions	DWORD	Output
• hInterrupt	DWORD	N/A
* Bus	WD_BUS	Input
• dwBusType	WD_BUS_TYPE	Output
• dwBusNum	DWORD	Output
• dwSlotFunc	DWORD	Output
* Val	struct	N/A

Description

Name	Description
hWD	Handle to WinDriver's kernel-mode driver as received from `WD_Open`() [5.2]
pPciCard	Pointer to a PCI card 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)
• Card	Card information structure:
* dwItems	Number of items detected on the card
* Item	Card items information structure:
• item	Type of item. Can be `ITEM_MEMORY`, `ITEM_IO`, `ITEM_INTERRUPT` or `ITEM_BUS`.
• fNotSharable	1 — Non-sharable resource; should be locked for exclusive use 0 — Sharable resource Note: You can modify the value of this field before registering the card and its resources using `WD_CardRegister`() [2.8].
• I	Specific data according to the `item` type:
* Mem	Describes a memory item (`item = ITEM_MEMORY`):
• dwPhysicalAddr	First address of the physical memory range. NOTE: For 64-bit BARs the value stored in this field may be incorrect, due to the 32-bit field size.
• dwBytes	Length of the memory range, in bytes
• dwBar	Base Address Register (BAR) number of the memory range
* IO	Describes an I/O item (`item = ITEM_IO`):
• dwAddr	First address of the I/O range
• dwBytes	Length of the I/O range, in bytes
• dwBar	Base Address Register (BAR) number for the I/O range
* Int	Describes an interrupt item (`item = ITEM_INTERRUPT`):
• dwInterrupt	Physical interrupt request (IRQ) number
• dwOptions	Interrupt options bit-mask, which can consist of a combination of any of the following flags for indicating the interrupt types supported by the device. The default interrupt type, when none of the following flags is set, is legacy edge-triggered interrupts. • `INTERRUPT_MESSAGE_X` — Indicates that the hardware supports Extended Message-Signaled Interrupts (MSI-X). This option is applicable only to PCI cards on Linux — see information in the WinDriver PCI Manual. • `INTERRUPT_MESSAGE` — On Linux, indicates that the hardware supports Message-Signaled Interrupts (MSI). On Windows, indicates that the hardware supports MSI or MSI-X. This option is applicable only to PCI cards on Linux and Windows Vista and higher — see information in the WinDriver PCI Manual. • `INTERRUPT_LEVEL_SENSITIVE` — Indicates that the hardware supports level-sensitive interrupts.
* Bus	Describes a bus item (`item = ITEM_BUS`):
• dwBusType	The card's bus type. For a PCI card the bus type is `WD_BUS_PCI`
• dwBusNum	The card's bus number
• dwSlotFunc	A combination of the card's bus slot and function numbers: the lower three bits represent the function number and the remaining bits represent the slot number. For example: a value of 0x80 (<=> 10000000 binary) corresponds to a function number of 0 (lower 3 bits: 000) and a slot number of 0x10 (remaining bits: 10000).

Return Value

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

Remarks

For PCI devices, if the I/O, memory and IRQ information is available from the Plug-and-Play Manager, the information is obtained from there. Otherwise, the information is read directly from the PCI configuration registers. Note: for Windows, you must have an inf file installed.
If the IRQ is obtained from the Plug-and-Play Manager, it is mapped and therefore may differ from the physical IRQ.

Example

WD_PCI_CARD_INFO pciCardInfo;
WD_CARD Card;

BZERO(pciCardInfo);
pciCardInfo.pciSlot = pciSlot;
WD_PciGetCardInfo(hWD, &pciCardInfo);
if (pciCardInfo.Card.dwItems!=0) /* At least one item was found */
{
    Card = pciCardInfo.Card;
}
else
{
    printf("Failed fetching PCI card information\n");
}


2.2. WD_PciScanCards()		2.4. WD_PciConfigDump()