class PciDevIf

#include "pci.h" 
virtual const char *devif_getBusName();
virtual int devif_getDevice();
virtual int devif_getFunction();
virtual module_t *devif_getInstance();
virtual const char *devif_getName();
virtual int devif_access(pci_space_t, uint64_t paddr, uint64_t offset, bool_t wr, uint32_t size, uint64_t* buf);

Description

This is an abstract class that defines the interface to a PCI device. A PCI bus calls this interface in each of its devices.

This interface is included with class PciDev and mostly handled by common/pci_dev.h.

devif_access is downstream I/O access to a device. The type of access is indicated by pci_space_t: configuration, I/O, mem32, or mem64. pci_dev.h defines a stub function which returns -1. Most devices will define this function. It is the main entry point for performing I/O to a device.

The other interfaces are all defined in pci_dev.h. They return information about the device.

All PCI device modules must export this interface, for example: 

// interface callback
void*
Sample::get_interface(const char *name)
{
    if (!strcmp(name, SAMPLE_INTERFACE))
	return this;
    if (!strcmp(name, PCI_DEV_INTERFACE))
	return (PciDevIf*)this;
    return NULL;
}