Drew DeVault
7 years ago
committed by
GitHub
commit
2f5ff45039
@ -1,252 +0,0 @@
|
||||
#define _POSIX_C_SOURCE 200809L
|
||||
#include <libudev.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include <errno.h>
|
||||
#include <xf86drm.h>
|
||||
#include <xf86drmMode.h>
|
||||
#include <wayland-server.h>
|
||||
#include <wlr/backend/session.h>
|
||||
#include <wlr/util/log.h>
|
||||
#include "backend/udev.h"
|
||||
|
||||
/* Tests if 'path' is KMS compatible by trying to open it.
|
||||
* It leaves the open device in *fd_out it it succeeds.
|
||||
*/
|
||||
static bool device_is_kms(struct wlr_session *restrict session,
|
||||
const char *restrict path, int *restrict fd_out) {
|
||||
|
||||
int fd;
|
||||
|
||||
if (!path) {
|
||||
return false;
|
||||
}
|
||||
|
||||
fd = wlr_session_open_file(session, path);
|
||||
if (fd < 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
drmModeRes *res = drmModeGetResources(fd);
|
||||
if (!res) {
|
||||
goto out_fd;
|
||||
}
|
||||
|
||||
if (res->count_crtcs <= 0 || res->count_connectors <= 0 ||
|
||||
res->count_encoders <= 0) {
|
||||
|
||||
goto out_res;
|
||||
}
|
||||
|
||||
if (*fd_out >= 0) {
|
||||
wlr_session_close_file(session, *fd_out);
|
||||
}
|
||||
|
||||
*fd_out = fd;
|
||||
|
||||
drmModeFreeResources(res);
|
||||
return true;
|
||||
|
||||
out_res:
|
||||
drmModeFreeResources(res);
|
||||
out_fd:
|
||||
wlr_session_close_file(session, fd);
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Tries to find the primary GPU by checking for the "boot_vga" attribute.
|
||||
* If it's not found, it returns the first valid GPU it finds.
|
||||
*/
|
||||
int wlr_udev_find_gpu(struct wlr_udev *udev, struct wlr_session *session) {
|
||||
struct udev_enumerate *en = udev_enumerate_new(udev->udev);
|
||||
if (!en) {
|
||||
wlr_log(L_ERROR, "Failed to create udev enumeration");
|
||||
return -1;
|
||||
}
|
||||
|
||||
udev_enumerate_add_match_subsystem(en, "drm");
|
||||
udev_enumerate_add_match_sysname(en, "card[0-9]*");
|
||||
udev_enumerate_scan_devices(en);
|
||||
|
||||
struct udev_list_entry *entry;
|
||||
int fd = -1;
|
||||
|
||||
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(en)) {
|
||||
bool is_boot_vga = false;
|
||||
|
||||
const char *path = udev_list_entry_get_name(entry);
|
||||
struct udev_device *dev = udev_device_new_from_syspath(udev->udev, path);
|
||||
if (!dev) {
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
const char *seat = udev_device_get_property_value(dev, "ID_SEAT");
|
||||
if (!seat)
|
||||
seat = "seat0";
|
||||
if (strcmp(session->seat, seat) != 0) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
*/
|
||||
|
||||
// This is owned by 'dev', so we don't need to free it
|
||||
struct udev_device *pci =
|
||||
udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
|
||||
|
||||
if (pci) {
|
||||
const char *id = udev_device_get_sysattr_value(pci, "boot_vga");
|
||||
if (id && strcmp(id, "1") == 0) {
|
||||
is_boot_vga = true;
|
||||
}
|
||||
}
|
||||
|
||||
// We already have a valid GPU
|
||||
if (!is_boot_vga && fd >= 0) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
|
||||
path = udev_device_get_devnode(dev);
|
||||
if (!device_is_kms(session, path, &fd)) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
|
||||
udev_device_unref(dev);
|
||||
|
||||
// We've found the primary GPU
|
||||
if (is_boot_vga) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
udev_enumerate_unref(en);
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
static int udev_event(int fd, uint32_t mask, void *data) {
|
||||
struct wlr_udev *udev = data;
|
||||
|
||||
struct udev_device *dev = udev_monitor_receive_device(udev->mon);
|
||||
if (!dev) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
const char *action = udev_device_get_action(dev);
|
||||
|
||||
wlr_log(L_DEBUG, "udev event for %s (%s)",
|
||||
udev_device_get_sysname(dev), action);
|
||||
|
||||
if (!action || strcmp(action, "change") != 0) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
dev_t devnum = udev_device_get_devnum(dev);
|
||||
struct wlr_udev_dev *signal;
|
||||
|
||||
wl_list_for_each(signal, &udev->devices, link) {
|
||||
if (signal->dev == devnum) {
|
||||
wl_signal_emit(&signal->invalidate, udev);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
udev_device_unref(dev);
|
||||
return 1;
|
||||
}
|
||||
|
||||
struct wlr_udev *wlr_udev_create(struct wl_display *display) {
|
||||
struct wlr_udev *udev = calloc(sizeof(struct wlr_udev), 1);
|
||||
if (!udev) {
|
||||
return NULL;
|
||||
}
|
||||
udev->udev = udev_new();
|
||||
if (!udev->udev) {
|
||||
wlr_log(L_ERROR, "Failed to create udev context");
|
||||
goto error;
|
||||
}
|
||||
|
||||
udev->mon = udev_monitor_new_from_netlink(udev->udev, "udev");
|
||||
if (!udev->mon) {
|
||||
wlr_log(L_ERROR, "Failed to create udev monitor");
|
||||
goto error_udev;
|
||||
}
|
||||
|
||||
udev_monitor_filter_add_match_subsystem_devtype(udev->mon, "drm", NULL);
|
||||
udev_monitor_enable_receiving(udev->mon);
|
||||
|
||||
struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
|
||||
int fd = udev_monitor_get_fd(udev->mon);
|
||||
|
||||
udev->event = wl_event_loop_add_fd(event_loop, fd, WL_EVENT_READABLE,
|
||||
udev_event, udev);
|
||||
if (!udev->event) {
|
||||
wlr_log(L_ERROR, "Failed to create udev event source");
|
||||
goto error_mon;
|
||||
}
|
||||
|
||||
wl_list_init(&udev->devices);
|
||||
|
||||
wlr_log(L_DEBUG, "Successfully initialized udev");
|
||||
return udev;
|
||||
|
||||
error_mon:
|
||||
udev_monitor_unref(udev->mon);
|
||||
error_udev:
|
||||
udev_unref(udev->udev);
|
||||
error:
|
||||
free(udev);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void wlr_udev_destroy(struct wlr_udev *udev) {
|
||||
if (!udev) {
|
||||
return;
|
||||
}
|
||||
|
||||
struct wlr_udev_dev *dev, *tmp;
|
||||
wl_list_for_each_safe(dev, tmp, &udev->devices, link) {
|
||||
free(dev);
|
||||
}
|
||||
|
||||
wl_event_source_remove(udev->event);
|
||||
udev_monitor_unref(udev->mon);
|
||||
udev_unref(udev->udev);
|
||||
free(udev);
|
||||
}
|
||||
|
||||
bool wlr_udev_signal_add(struct wlr_udev *udev, dev_t dev, struct wl_listener *listener) {
|
||||
struct wlr_udev_dev *device = malloc(sizeof(*device));
|
||||
if (!device) {
|
||||
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
|
||||
return false;
|
||||
}
|
||||
|
||||
device->dev = dev;
|
||||
wl_signal_init(&device->invalidate);
|
||||
wl_signal_add(&device->invalidate, listener);
|
||||
wl_list_insert(&udev->devices, &device->link);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void wlr_udev_signal_remove(struct wlr_udev *udev, struct wl_listener *listener) {
|
||||
if (!udev || !listener) {
|
||||
return;
|
||||
}
|
||||
|
||||
struct wlr_udev_dev *dev, *tmp;
|
||||
wl_list_for_each_safe(dev, tmp, &udev->devices, link) {
|
||||
// The signal should only have a single listener
|
||||
if (wl_signal_get(&dev->invalidate, listener->notify) != NULL) {
|
||||
wl_list_remove(&dev->link);
|
||||
free(dev);
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1,29 +0,0 @@
|
||||
#ifndef _WLR_INTERNAL_UDEV_H
|
||||
#define _WLR_INTERNAL_UDEV_H
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <libudev.h>
|
||||
#include <wlr/backend/session.h>
|
||||
#include <wayland-server.h>
|
||||
#include <wlr/backend/udev.h>
|
||||
|
||||
struct wlr_udev_dev {
|
||||
dev_t dev;
|
||||
struct wl_signal invalidate;
|
||||
|
||||
struct wl_list link;
|
||||
};
|
||||
|
||||
struct wlr_udev {
|
||||
struct udev *udev;
|
||||
struct udev_monitor *mon;
|
||||
struct wl_event_source *event;
|
||||
|
||||
struct wl_list devices;
|
||||
};
|
||||
|
||||
int wlr_udev_find_gpu(struct wlr_udev *udev, struct wlr_session *session);
|
||||
bool wlr_udev_signal_add(struct wlr_udev *udev, dev_t dev, struct wl_listener *listener);
|
||||
void wlr_udev_signal_remove(struct wlr_udev *udev, struct wl_listener *listener);
|
||||
|
||||
#endif
|
||||
@ -1,9 +0,0 @@
|
||||
#ifndef _WLR_BACKEND_UDEV_H
|
||||
#define _WLR_BACKEND_UDEV_H
|
||||
|
||||
struct wlr_udev;
|
||||
|
||||
struct wlr_udev *wlr_udev_create(struct wl_display *display);
|
||||
void wlr_udev_destroy(struct wlr_udev *udev);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in new issue