You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
456 lines
11 KiB
456 lines
11 KiB
#define _POSIX_C_SOURCE 200809L
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <wayland-server-core.h>
|
|
|
|
#include <wlr/backend/headless.h>
|
|
#include <wlr/backend/interface.h>
|
|
#include <wlr/backend/multi.h>
|
|
#include <wlr/backend/wayland.h>
|
|
#include <wlr/config.h>
|
|
#include <wlr/render/wlr_renderer.h>
|
|
#include <wlr/util/log.h>
|
|
#include "backend/backend.h"
|
|
#include "backend/multi.h"
|
|
#include "render/allocator/allocator.h"
|
|
#include "util/env.h"
|
|
#include "util/time.h"
|
|
|
|
#if WLR_HAS_SESSION
|
|
#include <wlr/backend/session.h>
|
|
#endif
|
|
|
|
#if WLR_HAS_DRM_BACKEND
|
|
#include <wlr/backend/drm.h>
|
|
#include "backend/drm/monitor.h"
|
|
#endif
|
|
|
|
#if WLR_HAS_LIBINPUT_BACKEND
|
|
#include <wlr/backend/libinput.h>
|
|
#endif
|
|
|
|
#if WLR_HAS_X11_BACKEND
|
|
#include <wlr/backend/x11.h>
|
|
#endif
|
|
|
|
#define WAIT_SESSION_TIMEOUT 10000 // ms
|
|
|
|
void wlr_backend_init(struct wlr_backend *backend,
|
|
const struct wlr_backend_impl *impl) {
|
|
*backend = (struct wlr_backend){
|
|
.impl = impl,
|
|
};
|
|
wl_signal_init(&backend->events.destroy);
|
|
wl_signal_init(&backend->events.new_input);
|
|
wl_signal_init(&backend->events.new_output);
|
|
}
|
|
|
|
void wlr_backend_finish(struct wlr_backend *backend) {
|
|
wl_signal_emit_mutable(&backend->events.destroy, backend);
|
|
}
|
|
|
|
bool wlr_backend_start(struct wlr_backend *backend) {
|
|
if (backend->impl->start) {
|
|
return backend->impl->start(backend);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void wlr_backend_destroy(struct wlr_backend *backend) {
|
|
if (!backend) {
|
|
return;
|
|
}
|
|
|
|
if (backend->impl && backend->impl->destroy) {
|
|
backend->impl->destroy(backend);
|
|
} else {
|
|
free(backend);
|
|
}
|
|
}
|
|
|
|
static struct wlr_session *session_create_and_wait(struct wl_display *disp) {
|
|
#if WLR_HAS_SESSION
|
|
struct wl_event_loop *event_loop = wl_display_get_event_loop(disp);
|
|
struct wlr_session *session = wlr_session_create(event_loop);
|
|
|
|
if (!session) {
|
|
wlr_log(WLR_ERROR, "Failed to start a session");
|
|
return NULL;
|
|
}
|
|
|
|
if (!session->active) {
|
|
wlr_log(WLR_INFO, "Waiting for a session to become active");
|
|
|
|
int64_t started_at = get_current_time_msec();
|
|
int64_t timeout = WAIT_SESSION_TIMEOUT;
|
|
|
|
while (!session->active) {
|
|
int ret = wl_event_loop_dispatch(event_loop, (int)timeout);
|
|
if (ret < 0) {
|
|
wlr_log_errno(WLR_ERROR, "Failed to wait for session active: "
|
|
"wl_event_loop_dispatch failed");
|
|
return NULL;
|
|
}
|
|
|
|
int64_t now = get_current_time_msec();
|
|
if (now >= started_at + WAIT_SESSION_TIMEOUT) {
|
|
break;
|
|
}
|
|
timeout = started_at + WAIT_SESSION_TIMEOUT - now;
|
|
}
|
|
|
|
if (!session->active) {
|
|
wlr_log(WLR_ERROR, "Timeout waiting session to become active");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return session;
|
|
#else
|
|
wlr_log(WLR_ERROR, "Cannot create session: disabled at compile-time");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
int wlr_backend_get_drm_fd(struct wlr_backend *backend) {
|
|
if (!backend->impl->get_drm_fd) {
|
|
return -1;
|
|
}
|
|
return backend->impl->get_drm_fd(backend);
|
|
}
|
|
|
|
uint32_t backend_get_buffer_caps(struct wlr_backend *backend) {
|
|
if (!backend->impl->get_buffer_caps) {
|
|
return 0;
|
|
}
|
|
|
|
return backend->impl->get_buffer_caps(backend);
|
|
}
|
|
|
|
static size_t parse_outputs_env(const char *name) {
|
|
const char *outputs_str = getenv(name);
|
|
if (outputs_str == NULL) {
|
|
return 1;
|
|
}
|
|
|
|
char *end;
|
|
int outputs = (int)strtol(outputs_str, &end, 10);
|
|
if (*end || outputs < 0) {
|
|
wlr_log(WLR_ERROR, "%s specified with invalid integer, ignoring", name);
|
|
return 1;
|
|
}
|
|
|
|
return outputs;
|
|
}
|
|
|
|
/**
|
|
* Helper to destroy the multi backend when one of its nested backends is
|
|
* destroyed.
|
|
*/
|
|
struct wlr_auto_backend_monitor {
|
|
struct wlr_backend *multi;
|
|
struct wlr_backend *primary;
|
|
|
|
struct wl_listener multi_destroy;
|
|
struct wl_listener primary_destroy;
|
|
};
|
|
|
|
static void auto_backend_monitor_destroy(struct wlr_auto_backend_monitor *monitor) {
|
|
wl_list_remove(&monitor->multi_destroy.link);
|
|
wl_list_remove(&monitor->primary_destroy.link);
|
|
free(monitor);
|
|
}
|
|
|
|
static void monitor_handle_multi_destroy(struct wl_listener *listener, void *data) {
|
|
struct wlr_auto_backend_monitor *monitor = wl_container_of(listener, monitor, multi_destroy);
|
|
auto_backend_monitor_destroy(monitor);
|
|
}
|
|
|
|
static void monitor_handle_primary_destroy(struct wl_listener *listener, void *data) {
|
|
struct wlr_auto_backend_monitor *monitor = wl_container_of(listener, monitor, primary_destroy);
|
|
wlr_backend_destroy(monitor->multi);
|
|
}
|
|
|
|
static struct wlr_auto_backend_monitor *auto_backend_monitor_create(
|
|
struct wlr_backend *multi, struct wlr_backend *primary) {
|
|
struct wlr_auto_backend_monitor *monitor = calloc(1, sizeof(*monitor));
|
|
if (monitor == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
monitor->multi = multi;
|
|
monitor->primary = primary;
|
|
|
|
monitor->multi_destroy.notify = monitor_handle_multi_destroy;
|
|
wl_signal_add(&multi->events.destroy, &monitor->multi_destroy);
|
|
|
|
monitor->primary_destroy.notify = monitor_handle_primary_destroy;
|
|
wl_signal_add(&primary->events.destroy, &monitor->primary_destroy);
|
|
|
|
return monitor;
|
|
}
|
|
|
|
static struct wlr_backend *attempt_wl_backend(struct wl_display *display) {
|
|
struct wl_event_loop *loop = wl_display_get_event_loop(display);
|
|
struct wlr_backend *backend = wlr_wl_backend_create(loop, NULL);
|
|
if (backend == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
size_t outputs = parse_outputs_env("WLR_WL_OUTPUTS");
|
|
for (size_t i = 0; i < outputs; ++i) {
|
|
wlr_wl_output_create(backend);
|
|
}
|
|
|
|
return backend;
|
|
}
|
|
|
|
static struct wlr_backend *attempt_x11_backend(struct wl_display *display,
|
|
const char *x11_display) {
|
|
#if WLR_HAS_X11_BACKEND
|
|
struct wlr_backend *backend = wlr_x11_backend_create(display, x11_display);
|
|
if (backend == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
size_t outputs = parse_outputs_env("WLR_X11_OUTPUTS");
|
|
for (size_t i = 0; i < outputs; ++i) {
|
|
wlr_x11_output_create(backend);
|
|
}
|
|
|
|
return backend;
|
|
#else
|
|
wlr_log(WLR_ERROR, "Cannot create X11 backend: disabled at compile-time");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static struct wlr_backend *attempt_headless_backend(
|
|
struct wl_display *display) {
|
|
struct wl_event_loop *loop = wl_display_get_event_loop(display);
|
|
struct wlr_backend *backend = wlr_headless_backend_create(loop);
|
|
if (backend == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
size_t outputs = parse_outputs_env("WLR_HEADLESS_OUTPUTS");
|
|
for (size_t i = 0; i < outputs; ++i) {
|
|
wlr_headless_add_output(backend, 1280, 720);
|
|
}
|
|
|
|
return backend;
|
|
}
|
|
|
|
static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
|
|
struct wlr_backend *backend, struct wlr_session *session) {
|
|
#if WLR_HAS_DRM_BACKEND
|
|
struct wlr_device *gpus[8];
|
|
ssize_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
|
|
if (num_gpus < 0) {
|
|
wlr_log(WLR_ERROR, "Failed to find GPUs");
|
|
return NULL;
|
|
}
|
|
|
|
if (num_gpus == 0) {
|
|
wlr_log(WLR_ERROR, "Found 0 GPUs, cannot create backend");
|
|
return NULL;
|
|
} else {
|
|
wlr_log(WLR_INFO, "Found %zu GPUs", num_gpus);
|
|
}
|
|
|
|
struct wlr_backend *primary_drm = NULL;
|
|
for (size_t i = 0; i < (size_t)num_gpus; ++i) {
|
|
struct wlr_backend *drm = wlr_drm_backend_create(display, session,
|
|
gpus[i], primary_drm);
|
|
if (!drm) {
|
|
wlr_log(WLR_ERROR, "Failed to create DRM backend");
|
|
continue;
|
|
}
|
|
|
|
if (!primary_drm) {
|
|
primary_drm = drm;
|
|
}
|
|
|
|
wlr_multi_backend_add(backend, drm);
|
|
}
|
|
if (!primary_drm) {
|
|
wlr_log(WLR_ERROR, "Could not successfully create backend on any GPU");
|
|
return NULL;
|
|
}
|
|
|
|
if (getenv("WLR_DRM_DEVICES") == NULL) {
|
|
drm_backend_monitor_create(backend, primary_drm, session, display);
|
|
}
|
|
|
|
return primary_drm;
|
|
#else
|
|
wlr_log(WLR_ERROR, "Cannot create DRM backend: disabled at compile-time");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static struct wlr_backend *attempt_libinput_backend(struct wlr_session *session) {
|
|
#if WLR_HAS_LIBINPUT_BACKEND
|
|
return wlr_libinput_backend_create(session);
|
|
#else
|
|
wlr_log(WLR_ERROR, "Cannot create libinput backend: disabled at compile-time");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static bool attempt_backend_by_name(struct wl_display *display,
|
|
struct wlr_backend *multi, char *name,
|
|
struct wlr_session **session_ptr) {
|
|
struct wlr_backend *backend = NULL;
|
|
if (strcmp(name, "wayland") == 0) {
|
|
backend = attempt_wl_backend(display);
|
|
} else if (strcmp(name, "x11") == 0) {
|
|
backend = attempt_x11_backend(display, NULL);
|
|
} else if (strcmp(name, "headless") == 0) {
|
|
backend = attempt_headless_backend(display);
|
|
} else if (strcmp(name, "drm") == 0 || strcmp(name, "libinput") == 0) {
|
|
// DRM and libinput need a session
|
|
if (*session_ptr == NULL) {
|
|
*session_ptr = session_create_and_wait(display);
|
|
if (*session_ptr == NULL) {
|
|
wlr_log(WLR_ERROR, "failed to start a session");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (strcmp(name, "libinput") == 0) {
|
|
backend = attempt_libinput_backend(*session_ptr);
|
|
} else {
|
|
// attempt_drm_backend() adds the multi drm backends itself
|
|
return attempt_drm_backend(display, multi, *session_ptr) != NULL;
|
|
}
|
|
} else {
|
|
wlr_log(WLR_ERROR, "unrecognized backend '%s'", name);
|
|
return false;
|
|
}
|
|
if (backend == NULL) {
|
|
return false;
|
|
}
|
|
|
|
return wlr_multi_backend_add(multi, backend);
|
|
}
|
|
|
|
struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
|
|
struct wlr_session **session_ptr) {
|
|
if (session_ptr != NULL) {
|
|
*session_ptr = NULL;
|
|
}
|
|
|
|
struct wlr_session *session = NULL;
|
|
struct wlr_backend *multi = wlr_multi_backend_create(display);
|
|
if (!multi) {
|
|
wlr_log(WLR_ERROR, "could not allocate multibackend");
|
|
return NULL;
|
|
}
|
|
|
|
char *names = getenv("WLR_BACKENDS");
|
|
if (names) {
|
|
wlr_log(WLR_INFO, "Loading user-specified backends due to WLR_BACKENDS: %s",
|
|
names);
|
|
|
|
names = strdup(names);
|
|
if (names == NULL) {
|
|
wlr_log(WLR_ERROR, "allocation failed");
|
|
goto error;
|
|
}
|
|
|
|
char *saveptr;
|
|
char *name = strtok_r(names, ",", &saveptr);
|
|
while (name != NULL) {
|
|
if (!attempt_backend_by_name(display, multi, name, &session)) {
|
|
wlr_log(WLR_ERROR, "failed to add backend '%s'", name);
|
|
free(names);
|
|
goto error;
|
|
}
|
|
|
|
name = strtok_r(NULL, ",", &saveptr);
|
|
}
|
|
|
|
free(names);
|
|
goto success;
|
|
}
|
|
|
|
if (getenv("WAYLAND_DISPLAY") || getenv("WAYLAND_SOCKET")) {
|
|
struct wlr_backend *wl_backend = attempt_wl_backend(display);
|
|
if (!wl_backend) {
|
|
goto error;
|
|
}
|
|
wlr_multi_backend_add(multi, wl_backend);
|
|
|
|
if (!auto_backend_monitor_create(multi, wl_backend)) {
|
|
goto error;
|
|
}
|
|
|
|
goto success;
|
|
}
|
|
|
|
const char *x11_display = getenv("DISPLAY");
|
|
if (x11_display) {
|
|
struct wlr_backend *x11_backend =
|
|
attempt_x11_backend(display, x11_display);
|
|
if (!x11_backend) {
|
|
goto error;
|
|
}
|
|
wlr_multi_backend_add(multi, x11_backend);
|
|
|
|
if (!auto_backend_monitor_create(multi, x11_backend)) {
|
|
goto error;
|
|
}
|
|
|
|
goto success;
|
|
}
|
|
|
|
// Attempt DRM+libinput
|
|
session = session_create_and_wait(display);
|
|
if (!session) {
|
|
wlr_log(WLR_ERROR, "Failed to start a DRM session");
|
|
goto error;
|
|
}
|
|
|
|
struct wlr_backend *libinput = attempt_libinput_backend(session);
|
|
if (libinput) {
|
|
wlr_multi_backend_add(multi, libinput);
|
|
if (!auto_backend_monitor_create(multi, libinput)) {
|
|
goto error;
|
|
}
|
|
} else if (env_parse_bool("WLR_LIBINPUT_NO_DEVICES")) {
|
|
wlr_log(WLR_INFO, "WLR_LIBINPUT_NO_DEVICES is set, "
|
|
"starting without libinput backend");
|
|
} else {
|
|
wlr_log(WLR_ERROR, "Failed to start libinput backend");
|
|
wlr_log(WLR_ERROR, "Set WLR_LIBINPUT_NO_DEVICES=1 to skip libinput");
|
|
goto error;
|
|
}
|
|
|
|
struct wlr_backend *primary_drm = attempt_drm_backend(display, multi, session);
|
|
if (primary_drm == NULL) {
|
|
wlr_log(WLR_ERROR, "Failed to open any DRM device");
|
|
goto error;
|
|
}
|
|
|
|
if (!auto_backend_monitor_create(multi, primary_drm)) {
|
|
goto error;
|
|
}
|
|
|
|
success:
|
|
if (session_ptr != NULL) {
|
|
*session_ptr = session;
|
|
}
|
|
return multi;
|
|
|
|
error:
|
|
wlr_backend_destroy(multi);
|
|
#if WLR_HAS_SESSION
|
|
wlr_session_destroy(session);
|
|
#endif
|
|
return NULL;
|
|
}
|