minix/lib/libsys/pci_find_dev.c

/*
pci_find_dev.c
*/

#include "pci.h"
#include "syslib.h"
#include <minix/sysutil.h>

/*===========================================================================*
 *				pci_find_dev				     *
 *===========================================================================*/
PUBLIC int pci_find_dev(u8_t bus, u8_t dev, u8_t func, int *devindp)
{
	int r;
	message m;

	m.m_type= BUSC_PCI_FIND_DEV;
	m.m1_i1= bus;
	m.m1_i2= dev;
	m.m1_i3= func;

	r= sendrec(pci_procnr, &m);
	if (r != 0)
		panic("pci_find_dev: can't talk to PCI: %d", r);

	if (m.m_type == 1)
	{
		*devindp= m.m1_i1;
		printf("pci_find_dev: got device %d for %d.%d.%d\n",
			*devindp, bus, dev, func);
		return 1;
	}
	if (m.m_type != 0)
		panic("pci_find_dev: got bad reply from PCI: %d", m.m_type);

	printf("pci_find_dev: got nothing\n");
	return 0;
}