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https://gitlab.uni-freiburg.de/opensourcevdi/spice-common
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bb8f66983a
Given that libudev is widely available on many Linux distros, we can use the relevant APIs to iterate over all the devices associated with the drm subsystem to figure out if a specific vendor GPU is available or not. This capability (identifying GPU Vendor) is useful to determine whether to launch Gstreamer pipeline using h/w accelerated plugins. On systems where libudev is not available (Windows, MacOS, etc) we'd have to make this determination based on the availability of the relevant plugins in the Gstreamer registry. Cc: Frediano Ziglio <freddy77@gmail.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Marc-André Lureau <marcandre.lureau@redhat.com> Cc: Dongwon Kim <dongwon.kim@intel.com> Cc: Hazwan Arif Mazlan <hazwan.arif.mazlan@intel.com> Cc: Jin Chung Teng <jin.chung.teng@intel.com> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Acked-by: Frediano Ziglio <freddy77@gmail.com>
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/*
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Copyright (C) 2023 Intel Corporation.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "udev.h"
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#ifdef HAVE_UDEV
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#include <libudev.h>
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#include <stdbool.h>
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#include <stdlib.h>
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GpuVendor spice_udev_detect_gpu(int gpu_vendor)
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{
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struct udev *udev;
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struct udev_device *drm_dev, *pci_dev;
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struct udev_enumerate *udev_enum;
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struct udev_list_entry *entry, *devices;
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const char *path, *vendor_id;
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GpuVendor vendor = VENDOR_GPU_NOTDETECTED;
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udev = udev_new();
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if (!udev) {
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return VENDOR_GPU_UNKNOWN;
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}
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udev_enum = udev_enumerate_new(udev);
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if (udev_enum) {
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udev_enumerate_add_match_subsystem(udev_enum, "drm");
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udev_enumerate_add_match_sysname(udev_enum, "card[0-9]");
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udev_enumerate_scan_devices(udev_enum);
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devices = udev_enumerate_get_list_entry(udev_enum);
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udev_list_entry_foreach(entry, devices) {
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path = udev_list_entry_get_name(entry);
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drm_dev = udev_device_new_from_syspath(udev, path);
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if (!drm_dev) {
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continue;
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}
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pci_dev = udev_device_get_parent_with_subsystem_devtype(drm_dev,
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"pci", NULL);
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if (pci_dev) {
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vendor_id = udev_device_get_sysattr_value(pci_dev, "vendor");
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if (vendor_id && strtol(vendor_id, NULL, 16) == gpu_vendor) {
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vendor = VENDOR_GPU_DETECTED;
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udev_device_unref(drm_dev);
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break;
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}
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}
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udev_device_unref(drm_dev);
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}
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udev_enumerate_unref(udev_enum);
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}
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udev_unref(udev);
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return vendor;
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}
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#else
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GpuVendor spice_udev_detect_gpu(int gpu_vendor)
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{
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return VENDOR_GPU_UNKNOWN;
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}
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#endif
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