test.c

#include <stdio.h>
#include <errno.h>

#include "xf86drm.h"
#include "xf86drmMode.h"
#include "nouveau_drm.h"
#include "nouveau.h"

int
pvdrm_device_open(const char *busid, struct nouveau_device **pdev)
{
	int ret = -ENODEV, fd = drmOpen("pvdrm", busid);
	if (fd >= 0) {
		ret = nouveau_device_wrap(fd, 1, pdev);
		if (ret)
			drmClose(fd);
	}
	return ret;
}

int main(int argc, char** argv) {
    struct nouveau_device *dev;
    struct nouveau_client *priv;

    if (!drmAvailable()) {
        printf("not available\n");
        return 1;
    }

    int ret = -ENODEV;
    int fd = drmOpen("pvdrm", NULL);
    if (fd < 0) {
        printf("fail\n");
        return 1;
    }

    if (pvdrm_device_open(0, &dev)) {
        printf("out\n");
        return 1;
    }

    printf("%u\n", dev->chipset);
    return 0;
}