Commit 7b7d8813 authored by Jonas Ådahl's avatar Jonas Ådahl Committed by Georges Basile Stavracas Neto

udev: Add helpers to list DRM devices

Will be used to move out some udev related logic when adding GPUs.

#548
!525
parent 44905d96
/*
* Copyright (C) 2019 Red Hat
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*/
#ifndef META_BACKEND_NATIVE_TYPES_H
#define META_BACKEND_NATIVE_TYPES_H
typedef struct _MetaBackendNative MetaBackendNative;
#endif /* META_BACKEND_NATIVE_TYPES_H */
......@@ -531,7 +531,7 @@ meta_backend_native_initable_init (GInitable *initable,
if (!native->launcher)
return FALSE;
native->udev = meta_udev_new ();
native->udev = meta_udev_new (native);
native->barrier_manager = meta_barrier_manager_native_new ();
return initable_parent_iface->init (initable, cancellable, error);
......
......@@ -22,6 +22,11 @@
#include "backends/native/meta-udev.h"
#include "backends/native/meta-backend-native.h"
#include "backends/native/meta-launcher.h"
#define DRM_CARD_UDEV_DEVICE_TYPE "drm_minor"
enum
{
DEVICE_ADDED,
......@@ -35,6 +40,8 @@ struct _MetaUdev
{
GObject parent;
MetaBackendNative *backend_native;
GUdevClient *gudev_client;
guint uevent_handler_id;
......@@ -42,6 +49,106 @@ struct _MetaUdev
G_DEFINE_TYPE (MetaUdev, meta_udev, G_TYPE_OBJECT)
gboolean
meta_is_udev_device_platform_device (GUdevDevice *device)
{
g_autoptr (GUdevDevice) platform_device = NULL;
platform_device = g_udev_device_get_parent_with_subsystem (device,
"platform",
NULL);
return !!platform_device;
}
gboolean
meta_is_udev_device_boot_vga (GUdevDevice *device)
{
g_autoptr (GUdevDevice) pci_device = NULL;
pci_device = g_udev_device_get_parent_with_subsystem (device, "pci", NULL);
if (!pci_device)
return FALSE;
return g_udev_device_get_sysfs_attr_as_int (pci_device, "boot_vga") == 1;
}
static gboolean
meta_udev_is_drm_device (MetaUdev *udev,
GUdevDevice *device)
{
MetaLauncher *launcher =
meta_backend_native_get_launcher (udev->backend_native);
const char *seat_id;
const char *device_type;
const char *device_seat;
/* Filter out devices that are not character device, like card0-VGA-1. */
if (g_udev_device_get_device_type (device) != G_UDEV_DEVICE_TYPE_CHAR)
return FALSE;
device_type = g_udev_device_get_property (device, "DEVTYPE");
if (g_strcmp0 (device_type, DRM_CARD_UDEV_DEVICE_TYPE) != 0)
return FALSE;
device_seat = g_udev_device_get_property (device, "ID_SEAT");
if (!device_seat)
{
/* When ID_SEAT is not set, it means seat0. */
device_seat = "seat0";
}
/* Skip devices that do not belong to our seat. */
seat_id = meta_launcher_get_seat_id (launcher);
if (g_strcmp0 (seat_id, device_seat))
return FALSE;
return TRUE;
}
GList *
meta_udev_list_drm_devices (MetaUdev *udev,
GError **error)
{
g_autoptr (GUdevEnumerator) enumerator = NULL;
GList *devices;
GList *l;
enumerator = g_udev_enumerator_new (udev->gudev_client);
g_udev_enumerator_add_match_name (enumerator, "card*");
g_udev_enumerator_add_match_tag (enumerator, "seat");
/*
* We need to explicitly match the subsystem for now.
* https://bugzilla.gnome.org/show_bug.cgi?id=773224
*/
g_udev_enumerator_add_match_subsystem (enumerator, "drm");
devices = g_udev_enumerator_execute (enumerator);
if (!devices)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"No drm devices found");
return FALSE;
}
for (l = devices; l;)
{
GUdevDevice *device = l->data;
GList *l_next = l->next;
if (!meta_udev_is_drm_device (udev, device))
{
g_object_unref (device);
devices = g_list_delete_link (devices, l);
}
l = l_next;
}
return devices;
}
static void
on_uevent (GUdevClient *client,
const char *action,
......@@ -64,9 +171,14 @@ meta_udev_get_gudev_client (MetaUdev *udev)
}
MetaUdev *
meta_udev_new (void)
meta_udev_new (MetaBackendNative *backend_native)
{
return g_object_new (META_TYPE_UDEV, NULL);
MetaUdev *udev;
udev = g_object_new (META_TYPE_UDEV, NULL);
udev->backend_native = backend_native;
return udev;
}
static void
......
......@@ -23,11 +23,20 @@
#include <gudev/gudev.h>
#include "backends/native/meta-backend-native-types.h"
#define META_TYPE_UDEV (meta_udev_get_type ())
G_DECLARE_FINAL_TYPE (MetaUdev, meta_udev, META, UDEV, GObject)
GUdevClient * meta_udev_get_gudev_client (MetaUdev *udev);
MetaUdev * meta_udev_new (void);
gboolean meta_is_udev_device_platform_device (GUdevDevice *device);
gboolean meta_is_udev_device_boot_vga (GUdevDevice *device);
GList * meta_udev_list_drm_devices (MetaUdev *udev,
GError **error);
MetaUdev * meta_udev_new (MetaBackendNative *backend_native);
#endif /* META_UDEV_H */
......@@ -569,6 +569,7 @@ if have_native_backend
'backends/native/meta-backend-native.c',
'backends/native/meta-backend-native.h',
'backends/native/meta-backend-native-private.h',
'backends/native/meta-backend-native-types.h',
'backends/native/meta-barrier-native.c',
'backends/native/meta-barrier-native.h',
'backends/native/meta-clutter-backend-native.c',
......
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