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-rw-r--r--backend/session/direct-ipc.c2
-rw-r--r--backend/session/direct.c38
-rw-r--r--backend/session/logind.c44
-rw-r--r--backend/session/session.c271
4 files changed, 312 insertions, 43 deletions
diff --git a/backend/session/direct-ipc.c b/backend/session/direct-ipc.c
index 71e22148..5f1494a6 100644
--- a/backend/session/direct-ipc.c
+++ b/backend/session/direct-ipc.c
@@ -212,7 +212,7 @@ void direct_ipc_finish(int sock, pid_t pid) {
waitpid(pid, NULL, 0);
}
-int direct_ipc_start(pid_t *pid_out) {
+int direct_ipc_init(pid_t *pid_out) {
if (!have_permissions()) {
return -1;
}
diff --git a/backend/session/direct.c b/backend/session/direct.c
index 82aa8e00..942dc552 100644
--- a/backend/session/direct.c
+++ b/backend/session/direct.c
@@ -48,7 +48,7 @@ static int direct_session_open(struct wlr_session *base, const char *path) {
}
if (major(st.st_rdev) == DRM_MAJOR) {
- session->base.drm_fd = fd;
+ direct_ipc_setmaster(session->sock, fd);
}
return fd;
@@ -65,8 +65,7 @@ static void direct_session_close(struct wlr_session *base, int fd) {
}
if (major(st.st_rdev) == DRM_MAJOR) {
- direct_ipc_dropmaster(session->sock, session->base.drm_fd);
- session->base.drm_fd = -1;
+ direct_ipc_dropmaster(session->sock, fd);
} else if (major(st.st_rdev) == INPUT_MAJOR) {
ioctl(fd, EVIOCREVOKE, 0);
}
@@ -79,7 +78,7 @@ static bool direct_change_vt(struct wlr_session *base, unsigned vt) {
return ioctl(session->tty_fd, VT_ACTIVATE, (int)vt) == 0;
}
-static void direct_session_finish(struct wlr_session *base) {
+static void direct_session_destroy(struct wlr_session *base) {
struct direct_session *session = wl_container_of(base, session, base);
struct vt_mode mode = {
.mode = VT_AUTO,
@@ -109,11 +108,27 @@ static int vt_handler(int signo, void *data) {
if (session->base.active) {
session->base.active = false;
wl_signal_emit(&session->base.session_signal, session);
- direct_ipc_dropmaster(session->sock, session->base.drm_fd);
+
+ struct wlr_device *dev;
+ wl_list_for_each(dev, &session->base.devices, link) {
+ if (major(dev->dev) == DRM_MAJOR) {
+ direct_ipc_dropmaster(session->sock,
+ dev->fd);
+ }
+ }
+
ioctl(session->tty_fd, VT_RELDISP, 1);
} else {
ioctl(session->tty_fd, VT_RELDISP, VT_ACKACQ);
- direct_ipc_setmaster(session->sock, session->base.drm_fd);
+
+ struct wlr_device *dev;
+ wl_list_for_each(dev, &session->base.devices, link) {
+ if (major(dev->dev) == DRM_MAJOR) {
+ direct_ipc_setmaster(session->sock,
+ dev->fd);
+ }
+ }
+
session->base.active = true;
wl_signal_emit(&session->base.session_signal, session);
}
@@ -196,14 +211,14 @@ error:
return false;
}
-static struct wlr_session *direct_session_start(struct wl_display *disp) {
+static struct wlr_session *direct_session_create(struct wl_display *disp) {
struct direct_session *session = calloc(1, sizeof(*session));
if (!session) {
wlr_log_errno(L_ERROR, "Allocation failed");
return NULL;
}
- session->sock = direct_ipc_start(&session->child);
+ session->sock = direct_ipc_init(&session->child);
if (session->sock == -1) {
goto error_session;
}
@@ -221,10 +236,7 @@ static struct wlr_session *direct_session_start(struct wl_display *disp) {
wlr_log(L_INFO, "Successfully loaded direct session");
snprintf(session->base.seat, sizeof(session->base.seat), "%s", seat);
- session->base.drm_fd = -1;
session->base.impl = &session_direct;
- session->base.active = true;
- wl_signal_init(&session->base.session_signal);
return &session->base;
error_ipc:
@@ -236,8 +248,8 @@ error_session:
}
const struct session_impl session_direct = {
- .start = direct_session_start,
- .finish = direct_session_finish,
+ .create = direct_session_create,
+ .destroy = direct_session_destroy,
.open = direct_session_open,
.close = direct_session_close,
.change_vt = direct_change_vt,
diff --git a/backend/session/logind.c b/backend/session/logind.c
index 20d9b5ed..3b237360 100644
--- a/backend/session/logind.c
+++ b/backend/session/logind.c
@@ -1,4 +1,5 @@
#define _POSIX_C_SOURCE 200809L
+#include <assert.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
@@ -67,10 +68,6 @@ static int logind_take_device(struct wlr_session *base, const char *path) {
goto error;
}
- if (major(st.st_rdev) == DRM_MAJOR) {
- session->base.drm_fd = fd;
- }
-
error:
sd_bus_error_free(&error);
sd_bus_message_unref(msg);
@@ -97,10 +94,6 @@ static void logind_release_device(struct wlr_session *base, int fd) {
wlr_log(L_ERROR, "Failed to release device '%d'", fd);
}
- if (major(st.st_rdev) == DRM_MAJOR) {
- session->base.drm_fd = -1;
- }
-
sd_bus_error_free(&error);
sd_bus_message_unref(msg);
}
@@ -204,7 +197,7 @@ static void release_control(struct logind_session *session) {
sd_bus_message_unref(msg);
}
-static void logind_session_finish(struct wlr_session *base) {
+static void logind_session_destroy(struct wlr_session *base) {
struct logind_session *session = wl_container_of(base, session, base);
release_control(session);
@@ -221,6 +214,20 @@ static int session_removed(sd_bus_message *msg, void *userdata, sd_bus_error *re
return 0;
}
+static struct wlr_device *find_device(struct wlr_session *session, dev_t devnum) {
+ struct wlr_device *dev;
+
+ wl_list_for_each(dev, &session->devices, link) {
+ if (dev->dev == devnum) {
+ return dev;
+ }
+ }
+
+ wlr_log(L_ERROR, "Tried to use dev_t %lu not opened by session",
+ (unsigned long)devnum);
+ assert(0);
+}
+
static int pause_device(sd_bus_message *msg, void *userdata, sd_bus_error *ret_error) {
struct logind_session *session = userdata;
int ret;
@@ -267,9 +274,13 @@ static int resume_device(sd_bus_message *msg, void *userdata, sd_bus_error *ret_
}
if (major == DRM_MAJOR) {
- dup2(fd, session->base.drm_fd);
- session->base.active = true;
- wl_signal_emit(&session->base.session_signal, session);
+ struct wlr_device *dev = find_device(&session->base, makedev(major, minor));
+ dup2(fd, dev->fd);
+
+ if (!session->base.active) {
+ session->base.active = true;
+ wl_signal_emit(&session->base.session_signal, session);
+ }
}
error:
@@ -316,7 +327,7 @@ static int dbus_event(int fd, uint32_t mask, void *data) {
return 1;
}
-static struct wlr_session *logind_session_start(struct wl_display *disp) {
+static struct wlr_session *logind_session_create(struct wl_display *disp) {
int ret;
struct logind_session *session = calloc(1, sizeof(*session));
if (!session) {
@@ -374,10 +385,7 @@ static struct wlr_session *logind_session_start(struct wl_display *disp) {
wlr_log(L_INFO, "Successfully loaded logind session");
- session->base.drm_fd = -1;
session->base.impl = &session_logind;
- session->base.active = true;
- wl_signal_init(&session->base.session_signal);
return &session->base;
error_bus:
@@ -390,8 +398,8 @@ error:
}
const struct session_impl session_logind = {
- .start = logind_session_start,
- .finish = logind_session_finish,
+ .create = logind_session_create,
+ .destroy = logind_session_destroy,
.open = logind_take_device,
.close = logind_release_device,
.change_vt = logind_change_vt,
diff --git a/backend/session/session.c b/backend/session/session.c
index a07d3cda..c9bc1397 100644
--- a/backend/session/session.c
+++ b/backend/session/session.c
@@ -1,5 +1,13 @@
+#include <assert.h>
#include <stddef.h>
#include <stdarg.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <libudev.h>
+#include <wayland-server.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
#include <wlr/backend/session.h>
#include <wlr/backend/session/interface.h>
#include <wlr/util/log.h>
@@ -15,34 +23,159 @@ static const struct session_impl *impls[] = {
NULL,
};
-struct wlr_session *wlr_session_start(struct wl_display *disp) {
- const struct session_impl **iter;
+static int udev_event(int fd, uint32_t mask, void *data) {
+ struct wlr_session *session = data;
+
+ struct udev_device *udev_dev = udev_monitor_receive_device(session->mon);
+ if (!udev_dev) {
+ return 1;
+ }
+
+ const char *action = udev_device_get_action(udev_dev);
+
+ wlr_log(L_DEBUG, "udev event for %s (%s)",
+ udev_device_get_sysname(udev_dev), action);
+
+ if (!action || strcmp(action, "change") != 0) {
+ goto out;
+ }
+
+ dev_t devnum = udev_device_get_devnum(udev_dev);
+ struct wlr_device *dev;
- for (iter = impls; *iter; ++iter) {
- struct wlr_session *session = (*iter)->start(disp);
- if (session) {
- return session;
+ wl_list_for_each(dev, &session->devices, link) {
+ if (dev->dev == devnum) {
+ wl_signal_emit(&dev->signal, session);
+ break;
}
}
- wlr_log(L_ERROR, "Failed to load session backend");
+out:
+ udev_device_unref(udev_dev);
+ return 1;
+}
+
+struct wlr_session *wlr_session_create(struct wl_display *disp) {
+ struct wlr_session *session = NULL;
+ const struct session_impl **iter;
+
+ for (iter = impls; !session && *iter; ++iter) {
+ session = (*iter)->create(disp);
+ }
+
+ if (!session) {
+ wlr_log(L_ERROR, "Failed to load session backend");
+ return NULL;
+ }
+
+ session->active = true;
+ wl_signal_init(&session->session_signal);
+ wl_list_init(&session->devices);
+
+ session->udev = udev_new();
+ if (!session->udev) {
+ wlr_log_errno(L_ERROR, "Failed to create udev context");
+ goto error_session;
+ }
+
+ session->mon = udev_monitor_new_from_netlink(session->udev, "udev");
+ if (!session->mon) {
+ wlr_log_errno(L_ERROR, "Failed to create udev monitor");
+ goto error_udev;
+ }
+
+ udev_monitor_filter_add_match_subsystem_devtype(session->mon, "drm", NULL);
+ udev_monitor_enable_receiving(session->mon);
+
+ struct wl_event_loop *event_loop = wl_display_get_event_loop(disp);
+ int fd = udev_monitor_get_fd(session->mon);
+
+ session->udev_event = wl_event_loop_add_fd(event_loop, fd,
+ WL_EVENT_READABLE, udev_event, session);
+ if (!session->udev_event) {
+ wlr_log_errno(L_ERROR, "Failed to create udev event source");
+ goto error_mon;
+ }
+
+ return session;
+
+error_mon:
+ udev_monitor_unref(session->mon);
+error_udev:
+ udev_unref(session->udev);
+error_session:
+ wlr_session_destroy(session);
return NULL;
}
-void wlr_session_finish(struct wlr_session *session) {
+void wlr_session_destroy(struct wlr_session *session) {
if (!session) {
return;
}
- session->impl->finish(session);
-};
+ wl_event_source_remove(session->udev_event);
+ udev_monitor_unref(session->mon);
+ udev_unref(session->udev);
+
+ session->impl->destroy(session);
+}
int wlr_session_open_file(struct wlr_session *session, const char *path) {
- return session->impl->open(session, path);
+ int fd = session->impl->open(session, path);
+ if (fd < 0) {
+ return fd;
+ }
+
+ struct wlr_device *dev = malloc(sizeof(*dev));
+ if (!dev) {
+ wlr_log_errno(L_ERROR, "Allocation failed");
+ goto error;
+ }
+
+ struct stat st;
+ if (fstat(fd, &st) < 0) {
+ wlr_log_errno(L_ERROR, "Stat failed");
+ goto error;
+ }
+
+ dev->fd = fd;
+ dev->dev = st.st_rdev;
+ wl_signal_init(&dev->signal);
+ wl_list_insert(&session->devices, &dev->link);
+
+ return fd;
+
+error:
+ free(dev);
+ return fd;
+}
+
+static struct wlr_device *find_device(struct wlr_session *session, int fd) {
+ struct wlr_device *dev;
+
+ wl_list_for_each(dev, &session->devices, link) {
+ if (dev->fd == fd) {
+ return dev;
+ }
+ }
+
+ wlr_log(L_ERROR, "Tried to use fd %d not opened by session", fd);
+ assert(0);
}
void wlr_session_close_file(struct wlr_session *session, int fd) {
+ struct wlr_device *dev = find_device(session, fd);
+
session->impl->close(session, fd);
+ wl_list_remove(&dev->link);
+ free(dev);
+}
+
+void wlr_session_signal_add(struct wlr_session *session, int fd,
+ struct wl_listener *listener) {
+ struct wlr_device *dev = find_device(session, fd);
+
+ wl_signal_add(&dev->signal, listener);
}
bool wlr_session_change_vt(struct wlr_session *session, unsigned vt) {
@@ -52,3 +185,119 @@ bool wlr_session_change_vt(struct wlr_session *session, unsigned vt) {
return session->impl->change_vt(session, vt);
}
+
+/* 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_session_find_gpu(struct wlr_session *session) {
+ struct udev_enumerate *en = udev_enumerate_new(session->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(session->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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 17:48:51 +0000