workbench/libs/mesa/src/gallium/targets/egl-static/egl.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.10
   4  *
   5  * Copyright (C) 2010-2011 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "common/egl_g3d_loader.h"
  30 #include "egldriver.h"
  31 #include "egllog.h"
  32
  33 #ifdef HAVE_LIBUDEV
  34 #include <stdio.h>
  35 #include <libudev.h>
  36 #define DRIVER_MAP_GALLIUM_ONLY
  37 #include "pci_ids/pci_id_driver_map.h"
  38 #endif
  39
  40 #include "egl_pipe.h"
  41 #include "egl_st.h"
  42
  43 static struct egl_g3d_loader egl_g3d_loader;
  44
  45 static struct st_module {
  46    boolean initialized;
  47    struct st_api *stapi;
  48 } st_modules[ST_API_COUNT];
  49
  50 static struct st_api *
  51 get_st_api(enum st_api_type api)
  52 {
  53    struct st_module *stmod = &st_modules[api];
  54
  55    if (!stmod->initialized) {
  56       stmod->stapi = egl_st_create_api(api);
  57       stmod->initialized = TRUE;
  58    }
  59
  60    return stmod->stapi;
  61 }
  62
  63 #if !defined(PIPE_OS_AROS)
  64 static const char *
  65 drm_fd_get_screen_name(int fd)
  66 {
  67 #ifdef HAVE_LIBUDEV
  68    struct udev *udev;
  69    struct udev_device *device, *parent;
  70    struct stat buf;
  71    const char *pci_id;
  72    int vendor_id, chip_id, idx = -1, i;
  73
  74    udev = udev_new();
  75    if (fstat(fd, &buf) < 0) {
  76       _eglLog(_EGL_WARNING, "failed to stat fd %d", fd);
  77       return NULL;
  78    }
  79
  80    device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
  81    if (device == NULL) {
  82       _eglLog(_EGL_WARNING,
  83               "could not create udev device for fd %d", fd);
  84       return NULL;
  85    }
  86
  87    parent = udev_device_get_parent(device);
  88    if (parent == NULL) {
  89       _eglLog(_EGL_WARNING, "could not get parent device");
  90       goto out;
  91    }
  92
  93    pci_id = udev_device_get_property_value(parent, "PCI_ID");
  94    if (pci_id == NULL ||
  95        sscanf(pci_id, "%x:%x", &vendor_id, &chip_id) != 2) {
  96       _eglLog(_EGL_WARNING, "malformed or no PCI ID");
  97       goto out;
  98    }
  99
 100    /* find the driver index */
 101    for (idx = 0; driver_map[idx].driver; idx++) {
 102       if (vendor_id != driver_map[idx].vendor_id)
 103          continue;
 104
 105       if (driver_map[idx].num_chips_ids == -1)
 106          goto out;
 107
 108       for (i = 0; i < driver_map[idx].num_chips_ids; i++) {
 109          if (driver_map[idx].chip_ids[i] == chip_id)
 110             goto out;
 111       }
 112    }
 113
 114 out:
 115    udev_device_unref(device);
 116    udev_unref(udev);
 117
 118    if (idx >= 0) {
 119       _eglLog((driver_map[idx].driver) ? _EGL_INFO : _EGL_WARNING,
 120             "pci id for fd %d: %04x:%04x, driver %s",
 121             fd, vendor_id, chip_id, driver_map[idx].driver);
 122
 123       return driver_map[idx].driver;
 124    }
 125 #endif
 126
 127    _eglLog(_EGL_WARNING, "failed to get driver name for fd %d", fd);
 128
 129    return NULL;
 130 }
 131
 132 static struct pipe_screen *
 133 create_drm_screen(const char *name, int fd)
 134 {
 135    if (!name) {
 136       name = drm_fd_get_screen_name(fd);
 137       if (!name)
 138          return NULL;
 139    }
 140
 141    return egl_pipe_create_drm_screen(name, fd);
 142 }
 143
 144 static struct pipe_screen *
 145 create_sw_screen(struct sw_winsys *ws)
 146 {
 147    return egl_pipe_create_swrast_screen(ws);
 148 }
 149 #endif
 150
 151 static const struct egl_g3d_loader *
 152 loader_init(void)
 153 {
 154    int i;
 155
 156    for (i = 0; i < ST_API_COUNT; i++)
 157       egl_g3d_loader.profile_masks[i] = egl_st_get_profile_mask(i);
 158
 159    egl_g3d_loader.get_st_api = get_st_api;
 160 #if !defined(PIPE_OS_AROS)
 161    egl_g3d_loader.create_drm_screen = create_drm_screen;
 162    egl_g3d_loader.create_sw_screen = create_sw_screen;
 163 #endif
 164
 165    return &egl_g3d_loader;
 166 }
 167
 168 static void
 169 loader_fini(void)
 170 {
 171    int i;
 172
 173    for (i = 0; i < ST_API_COUNT; i++) {
 174       struct st_module *stmod = &st_modules[i];
 175
 176       if (stmod->stapi) {
 177          egl_st_destroy_api(stmod->stapi);
 178          stmod->stapi = NULL;
 179       }
 180       stmod->initialized = FALSE;
 181    }
 182 }
 183
 184 static void
 185 egl_g3d_unload(_EGLDriver *drv)
 186 {
 187    egl_g3d_destroy_driver(drv);
 188    loader_fini();
 189 }
 190
 191 _EGLDriver *
 192 _EGL_MAIN(const char *args)
 193 {
 194    const struct egl_g3d_loader *loader;
 195    _EGLDriver *drv;
 196
 197    loader = loader_init();
 198    drv = egl_g3d_create_driver(loader);
 199    if (!drv) {
 200       loader_fini();
 201       return NULL;
 202    }
 203
 204    drv->Name = "Gallium";
 205    drv->Unload = egl_g3d_unload;
 206
 207    return drv;
 208 }