src/glx/dri3_common.c

   1 /*
   2  * Copyright © 2013 Keith Packard
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 /*
  24  * This code is derived from src/egl/drivers/dri2/common.c which
  25  * carries the following copyright:
  26  *
  27  * Copyright © 2011 Intel Corporation
  28  *
  29  * Permission is hereby granted, free of charge, to any person obtaining a
  30  * copy of this software and associated documentation files (the "Software"),
  31  * to deal in the Software without restriction, including without limitation
  32  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  33  * and/or sell copies of the Software, and to permit persons to whom the
  34  * Software is furnished to do so, subject to the following conditions:
  35  *
  36  * The above copyright notice and this permission notice (including the next
  37  * paragraph) shall be included in all copies or substantial portions of the
  38  * Software.
  39  *
  40  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  41  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  42  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  43  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  44  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  45  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  46  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  47  * DEALINGS IN THE SOFTWARE.
  48  *
  49  * Authors:
  50  *    Kristian Høgsberg <krh@bitplanet.net>
  51  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  52  */
  53
  54 #include <stdio.h>
  55 #include <string.h>
  56
  57 #include <sys/types.h>
  58 #include <sys/stat.h>
  59 #include <unistd.h>
  60 #include <GL/gl.h>
  61 #include "glapi.h"
  62 #include "glxclient.h"
  63 #include "xf86dri.h"
  64 #include <dlfcn.h>
  65 #include <fcntl.h>
  66 #include <unistd.h>
  67 #include <sys/types.h>
  68 #include <sys/mman.h>
  69 #include <sys/time.h>
  70 #include "xf86drm.h"
  71 #include "dri_common.h"
  72 #include "dri3_priv.h"
  73
  74 #define DRIVER_MAP_DRI3_ONLY
  75 #include "pci_ids/pci_id_driver_map.h"
  76
  77 #include <libudev.h>
  78
  79 static struct udev_device *
  80 dri3_udev_device_new_from_fd(struct udev *udev, int fd)
  81 {
  82    struct udev_device *device;
  83    struct stat buf;
  84
  85    if (fstat(fd, &buf) < 0) {
  86       ErrorMessageF("DRI3: failed to stat fd %d", fd);
  87       return NULL;
  88    }
  89
  90    device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
  91    if (device == NULL) {
  92       ErrorMessageF("DRI3: could not create udev device for fd %d", fd);
  93       return NULL;
  94    }
  95
  96    return device;
  97 }
  98
  99 char *
 100 dri3_get_driver_for_fd(int fd)
 101 {
 102    struct udev *udev;
 103    struct udev_device *device, *parent;
 104    const char *pci_id;
 105    char *driver = NULL;
 106    int vendor_id, chip_id, i, j;
 107
 108    udev = udev_new();
 109    device = dri3_udev_device_new_from_fd(udev, fd);
 110    if (device == NULL)
 111       return NULL;
 112
 113    parent = udev_device_get_parent(device);
 114    if (parent == NULL) {
 115       ErrorMessageF("DRI3: could not get parent device");
 116       goto out;
 117    }
 118
 119    pci_id = udev_device_get_property_value(parent, "PCI_ID");
 120    if (pci_id == NULL ||
 121        sscanf(pci_id, "%x:%x", &vendor_id, &chip_id) != 2) {
 122       ErrorMessageF("DRI3: malformed or no PCI ID");
 123       goto out;
 124    }
 125
 126    for (i = 0; driver_map[i].driver; i++) {
 127       if (vendor_id != driver_map[i].vendor_id)
 128          continue;
 129       if (driver_map[i].num_chips_ids == -1) {
 130          driver = strdup(driver_map[i].driver);
 131          goto out;
 132       }
 133
 134       for (j = 0; j < driver_map[i].num_chips_ids; j++)
 135          if (driver_map[i].chip_ids[j] == chip_id) {
 136             driver = strdup(driver_map[i].driver);
 137             goto out;
 138          }
 139    }
 140
 141 out:
 142    udev_device_unref(device);
 143    udev_unref(udev);
 144
 145    return driver;
 146 }