src/loader/pci_id_driver_map.c

   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
  24 int 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
  32 static int
  33 nouveau_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
  45 int
  46 is_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
  55 int is_nouveau_vieux(int fd) { return 0; }
  56
  57 #endif