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 #include <stdbool.h>
  25
  26 bool is_nouveau_vieux(int fd);
  27
  28 #ifdef HAVE_LIBDRM
  29
  30 #include <stdlib.h>
  31 #include <xf86drm.h>
  32 #include <nouveau_drm.h>
  33
  34 static int
  35 nouveau_chipset(int fd)
  36 {
  37    struct drm_nouveau_getparam gp = { NOUVEAU_GETPARAM_CHIPSET_ID, 0 };
  38    int ret;
  39
  40    ret = drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &gp, sizeof(gp));
  41    if (ret)
  42       return -1;
  43
  44    return gp.value;
  45 }
  46
  47 bool
  48 is_nouveau_vieux(int fd)
  49 {
  50    int chipset = nouveau_chipset(fd);
  51    return (chipset > 0 && chipset < 0x30) ||
  52       (chipset < 0x40 && getenv("NOUVEAU_VIEUX") != NULL);
  53 }
  54
  55 #else
  56
  57 bool is_nouveau_vieux(int fd) { return false; }
  58
  59 #endif