#include <stdio.h>
#include <sys/pciio.h>
#include <unistd.h>
#include <fcntl.h>

#define PCIOCUNBIND _IOWR('p', 9, struct pcisel)

int main(int argc, char *argv[]) {
	struct pcisel ps;
	int fd, rc;
	if (argc > 3) {
		ps.pc_bus = atoi(argv[1]);
		ps.pc_dev = atoi(argv[2]);
		ps.pc_func= atoi(argv[3]);
		fd = open("/dev/pci0", O_RDONLY);
		rc = ioctl(fd, PCIOCUNBIND, &ps);
		printf("%d %d %d : fd = %d rc = %d\n", ps.pc_bus, ps.pc_dev, ps.pc_func, fd, rc);
	}
}