src/vulkan/device-select-layer/device_select_wayland.c

   1 /*
   2  * Copyright © 2019 Red Hat
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23 #include "macros.h"
  24 #include <wayland-client.h>
  25 #include "wayland-drm-client-protocol.h"
  26 #include "device_select.h"
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 #include <xf86drm.h>
  32 struct device_select_wayland_info {
  33    struct wl_drm *wl_drm;
  34    drmDevicePtr dev_info;
  35    bool info_is_set;
  36 };
  37
  38 static void
  39 device_select_drm_handle_device(void *data, struct wl_drm *drm, const char *device)
  40 {
  41    struct device_select_wayland_info *info = data;
  42
  43    int fd = open(device, O_RDWR | O_CLOEXEC);
  44    if (fd == -1)
  45       return;
  46
  47    int ret = drmGetDevice2(fd, 0, &info->dev_info);
  48    if (ret >= 0)
  49       info->info_is_set = true;
  50    close(fd);
  51    return;
  52 }
  53
  54 static void
  55 device_select_drm_handle_format(void *data, struct wl_drm *drm, uint32_t format)
  56 {
  57
  58 }
  59
  60 static void
  61 device_select_drm_handle_authenticated(void *data, struct wl_drm *drm)
  62 {
  63
  64 }
  65
  66
  67 static void
  68 device_select_drm_handle_capabilities(void *data, struct wl_drm *drm, uint32_t value)
  69 {
  70
  71 }
  72
  73
  74 static const struct wl_drm_listener ds_drm_listener = {
  75    .device = device_select_drm_handle_device,
  76    .format = device_select_drm_handle_format,
  77    .authenticated = device_select_drm_handle_authenticated,
  78    .capabilities = device_select_drm_handle_capabilities
  79 };
  80
  81 static void
  82 device_select_registry_global(void *data, struct wl_registry *registry, uint32_t name,
  83                               const char *interface, uint32_t version)
  84 {
  85    struct device_select_wayland_info *info = data;
  86    if (strcmp(interface, "wl_drm") == 0) {
  87       info->wl_drm = wl_registry_bind(registry, name, &wl_drm_interface, MIN2(version, 2));
  88       wl_drm_add_listener(info->wl_drm, &ds_drm_listener, data);
  89    }
  90 }
  91
  92 static void
  93 device_select_registry_global_remove_cb(void *data, struct wl_registry *registry,
  94                                         uint32_t name)
  95 {
  96
  97 }
  98
  99 int device_select_find_wayland_pci_default(struct device_pci_info *devices, uint32_t device_count)
 100 {
 101    struct wl_display *display;
 102    struct wl_registry *registry = NULL;
 103    unsigned default_idx = -1;
 104    struct device_select_wayland_info info = {};
 105
 106    display = wl_display_connect(NULL);
 107    if (!display)
 108       goto out;
 109
 110    registry = wl_display_get_registry(display);
 111    if (!registry) {
 112       wl_display_disconnect(display);
 113       goto out;
 114    }
 115
 116    static const struct wl_registry_listener registry_listener =
 117       { device_select_registry_global, device_select_registry_global_remove_cb };
 118
 119    wl_registry_add_listener(registry, &registry_listener, &info);
 120    wl_display_dispatch(display);
 121    wl_display_roundtrip(display);
 122
 123
 124    if (info.info_is_set) {
 125       for (unsigned i = 0; i < device_count; i++) {
 126          if (devices[i].has_bus_info) {
 127             if (info.dev_info->businfo.pci->domain == devices[i].bus_info.domain &&
 128                 info.dev_info->businfo.pci->bus == devices[i].bus_info.bus &&
 129                 info.dev_info->businfo.pci->dev == devices[i].bus_info.dev &&
 130                 info.dev_info->businfo.pci->func == devices[i].bus_info.func)
 131                default_idx = i;
 132          } else {
 133             if (info.dev_info->deviceinfo.pci->vendor_id == devices[i].dev_info.vendor_id &&
 134                 info.dev_info->deviceinfo.pci->device_id == devices[i].dev_info.device_id)
 135                default_idx = i;
 136          }
 137          if (default_idx != -1)
 138             break;
 139       }
 140    }
 141
 142    wl_drm_destroy(info.wl_drm);
 143    wl_registry_destroy(registry);
 144    wl_display_disconnect(display);
 145  out:
 146    return default_idx;
 147 }