1/*
2 * Copyright 2014 Ilia Mirkin
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24int is_nouveau_vieux(int fd);
25
26#ifdef HAVE_LIBDRM
27
28#include <stdlib.h>
29#include <xf86drm.h>
30#include <nouveau_drm.h>
31
32static int
33nouveau_chipset(int fd)
34{
35   struct drm_nouveau_getparam gp = { NOUVEAU_GETPARAM_CHIPSET_ID, 0 };
36   int ret;
37
38   ret = drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &gp, sizeof(gp));
39   if (ret)
40      return -1;
41
42   return gp.value;
43}
44
45int
46is_nouveau_vieux(int fd)
47{
48   int chipset = nouveau_chipset(fd);
49   return (chipset > 0 && chipset < 0x30) ||
50      (chipset < 0x40 && getenv("NOUVEAU_VIEUX") != NULL);
51}
52
53#else
54
55int is_nouveau_vieux(int fd) { return 0; }
56
57#endif
58