/*

 * Copyright © 2011 Red Hat

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 *

 * Authors:

 *    Jerome Glisse <j.glisse@gmail.com>

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include "rbo.h"

#include "xf86drm.h"

/* allocate as many single page bo to try to starve the kernel

 * memory zone (below highmem)

 */

static void ttm_starve_kernel_private_memory(int fd)

{

    struct list_head list;

    struct rbo *bo, *tmp;

    unsigned nbo = 0;

    printf("\n[%s]\n", __func__);

    list_inithead(&list);

    while (1) {

        bo = rbo(fd, 0, 4096, 0, NULL);

        if (bo == NULL) {

            printf("failing after %d bo\n", nbo);

            break;

        }

        nbo++;

        list_add(&bo->list, &list);

    }

    LIST_FOR_EACH_ENTRY_SAFE(bo, tmp, &list, list) {

        list_del(&bo->list);

        rbo_decref(bo);

    }

}

static int radeon_open_fd(void)

{

    return drmOpen("radeon", NULL);

}

int main(void)

{

    int radeonfd;

    radeonfd = radeon_open_fd();

    if (radeonfd < 0) {

        fprintf(stderr, "failed to open radeon fd\n");

        return -1;

    }

    ttm_starve_kernel_private_memory(radeonfd);

    close(radeonfd);

    return 0;

}