pci_find_class()

Find devices that have a specific Class Code

Synopsis:

#include <hw/pci.h>

int pci_find_class( unsigned long class_code,
                    unsigned index,
                    unsigned* bus,
                    unsigned* dev_func );

Library:

libc

Description:

The pci_find_class() function determines the location of the nth PCI device or function that has the specified class code.

The arguments are as follows:

class_code

The class of device or function sought.

index

The index (n) of the device or function sought.

bus

The bus number, in the range [0...255].

dev_func

The Device or Function number of the nth device or function of the given class. The device number is in bits 7 through 3, and the function number in bits 2 through 0.

You can find all the devices having the same class code by making successive calls to this function, starting with an index of 0, and incrementing it until PCI_DEVICE_NOT_FOUND is returned.

Returns:

PCI_DEVICE_NOT_FOUND

The device or function wasn't found.

PCI_SUCCESS

The device or function was found.

Classification:

QNX 6

See also:

pci_attach(), pci_attach_device(), pci_detach(), pci_detach_device(), pci_find_device(), pci_present(), pci_read_config(), pci_read_config8(), pci_read_config16(), pci_read_config32(), pci_rescan_bus(), pci_write_config(), pci_write_config8(), pci_write_config16(), pci_write_config32()