static int drm_mode_object_get_reg(struct drm_device *dev,
struct drm_mode_object *obj,
uint32_t obj_type,
- bool register_obj)
+ bool register_obj,
+ void (*obj_free_cb)(struct kref *kref))
{
int ret;
*/
obj->id = ret;
obj->type = obj_type;
+ if (obj_free_cb) {
+ obj->free_cb = obj_free_cb;
+ kref_init(&obj->refcount);
+ }
}
mutex_unlock(&dev->mode_config.idr_mutex);
int drm_mode_object_get(struct drm_device *dev,
struct drm_mode_object *obj, uint32_t obj_type)
{
- return drm_mode_object_get_reg(dev, obj, obj_type, true);
+ return drm_mode_object_get_reg(dev, obj, obj_type, true, NULL);
}
static void drm_mode_object_register(struct drm_device *dev,
}
/**
- * drm_mode_object_put - free a modeset identifer
+ * drm_mode_object_unregister - free a modeset identifer
* @dev: DRM device
* @object: object to free
*
- * Free @id from @dev's unique identifier pool. Note that despite the _get
- * postfix modeset identifiers are _not_ reference counted. Hence don't use this
+ * Free @id from @dev's unique identifier pool.
+ * This function can be called multiple times, and guards against
+ * multiple removals.
+ * These modeset identifiers are _not_ reference counted. Hence don't use this
* for reference counted modeset objects like framebuffers.
*/
-void drm_mode_object_put(struct drm_device *dev,
+void drm_mode_object_unregister(struct drm_device *dev,
struct drm_mode_object *object)
{
mutex_lock(&dev->mode_config.idr_mutex);
- idr_remove(&dev->mode_config.crtc_idr, object->id);
+ if (object->id) {
+ idr_remove(&dev->mode_config.crtc_idr, object->id);
+ object->id = 0;
+ }
mutex_unlock(&dev->mode_config.idr_mutex);
}
obj = NULL;
/* don't leak out unref'd fb's */
if (obj &&
- (obj->type == DRM_MODE_OBJECT_FB ||
- obj->type == DRM_MODE_OBJECT_BLOB))
+ obj->type == DRM_MODE_OBJECT_BLOB)
obj = NULL;
mutex_unlock(&dev->mode_config.idr_mutex);
}
EXPORT_SYMBOL(drm_mode_object_find);
+void drm_mode_object_unreference(struct drm_mode_object *obj)
+{
+ if (obj->free_cb) {
+ DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount));
+ kref_put(&obj->refcount, obj->free_cb);
+ }
+}
+EXPORT_SYMBOL(drm_mode_object_unreference);
+
+/**
+ * drm_mode_object_reference - incr the fb refcnt
+ * @obj: mode_object
+ *
+ * This function operates only on refcounted objects.
+ * This functions increments the object's refcount.
+ */
+void drm_mode_object_reference(struct drm_mode_object *obj)
+{
+ if (obj->free_cb) {
+ DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount));
+ kref_get(&obj->refcount);
+ }
+}
+EXPORT_SYMBOL(drm_mode_object_reference);
+
+static void drm_framebuffer_free(struct kref *kref)
+{
+ struct drm_framebuffer *fb =
+ container_of(kref, struct drm_framebuffer, base.refcount);
+ struct drm_device *dev = fb->dev;
+
+ /*
+ * The lookup idr holds a weak reference, which has not necessarily been
+ * removed at this point. Check for that.
+ */
+ mutex_lock(&dev->mode_config.fb_lock);
+ drm_mode_object_unregister(dev, &fb->base);
+ mutex_unlock(&dev->mode_config.fb_lock);
+
+ fb->funcs->destroy(fb);
+}
+
/**
* drm_framebuffer_init - initialize a framebuffer
* @dev: DRM device
int ret;
mutex_lock(&dev->mode_config.fb_lock);
- kref_init(&fb->refcount);
INIT_LIST_HEAD(&fb->filp_head);
fb->dev = dev;
fb->funcs = funcs;
- ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
+ ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB,
+ true, drm_framebuffer_free);
if (ret)
goto out;
}
EXPORT_SYMBOL(drm_framebuffer_init);
-/* dev->mode_config.fb_lock must be held! */
-static void __drm_framebuffer_unregister(struct drm_device *dev,
- struct drm_framebuffer *fb)
-{
- drm_mode_object_put(dev, &fb->base);
-
- fb->base.id = 0;
-}
-
-static void drm_framebuffer_free(struct kref *kref)
-{
- struct drm_framebuffer *fb =
- container_of(kref, struct drm_framebuffer, refcount);
- struct drm_device *dev = fb->dev;
-
- /*
- * The lookup idr holds a weak reference, which has not necessarily been
- * removed at this point. Check for that.
- */
- mutex_lock(&dev->mode_config.fb_lock);
- if (fb->base.id) {
- /* Mark fb as reaped and drop idr ref. */
- __drm_framebuffer_unregister(dev, fb);
- }
- mutex_unlock(&dev->mode_config.fb_lock);
-
- fb->funcs->destroy(fb);
-}
-
-static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
- uint32_t id)
-{
- struct drm_mode_object *obj = NULL;
- struct drm_framebuffer *fb;
-
- mutex_lock(&dev->mode_config.idr_mutex);
- obj = idr_find(&dev->mode_config.crtc_idr, id);
- if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
- fb = NULL;
- else
- fb = obj_to_fb(obj);
- mutex_unlock(&dev->mode_config.idr_mutex);
-
- return fb;
-}
-
/**
* drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
* @dev: drm device
struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
uint32_t id)
{
- struct drm_framebuffer *fb;
+ struct drm_mode_object *obj;
+ struct drm_framebuffer *fb = NULL;
mutex_lock(&dev->mode_config.fb_lock);
- fb = __drm_framebuffer_lookup(dev, id);
- if (fb) {
- if (!kref_get_unless_zero(&fb->refcount))
+ obj = _object_find(dev, id, DRM_MODE_OBJECT_FB);
+ if (obj) {
+ fb = obj_to_fb(obj);
+ if (!kref_get_unless_zero(&fb->base.refcount))
fb = NULL;
}
mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_lookup);
-/**
- * drm_framebuffer_unreference - unref a framebuffer
- * @fb: framebuffer to unref
- *
- * This functions decrements the fb's refcount and frees it if it drops to zero.
- */
-void drm_framebuffer_unreference(struct drm_framebuffer *fb)
-{
- DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
- kref_put(&fb->refcount, drm_framebuffer_free);
-}
-EXPORT_SYMBOL(drm_framebuffer_unreference);
-
-/**
- * drm_framebuffer_reference - incr the fb refcnt
- * @fb: framebuffer
- *
- * This functions increments the fb's refcount.
- */
-void drm_framebuffer_reference(struct drm_framebuffer *fb)
-{
- DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
- kref_get(&fb->refcount);
-}
-EXPORT_SYMBOL(drm_framebuffer_reference);
-
/**
* drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
* @fb: fb to unregister
mutex_lock(&dev->mode_config.fb_lock);
/* Mark fb as reaped and drop idr ref. */
- __drm_framebuffer_unregister(dev, fb);
+ drm_mode_object_unregister(dev, &fb->base);
mutex_unlock(&dev->mode_config.fb_lock);
}
EXPORT_SYMBOL(drm_framebuffer_unregister_private);
* in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
* in this manner.
*/
- if (atomic_read(&fb->refcount.refcount) > 1) {
+ if (drm_framebuffer_read_refcount(fb) > 1) {
drm_modeset_lock_all(dev);
/* remove from any CRTC */
drm_for_each_crtc(crtc, dev) {
drm_num_crtcs(dev));
}
if (!crtc->name) {
- drm_mode_object_put(dev, &crtc->base);
+ drm_mode_object_unregister(dev, &crtc->base);
return -ENOMEM;
}
drm_modeset_lock_fini(&crtc->mutex);
- drm_mode_object_put(dev, &crtc->base);
+ drm_mode_object_unregister(dev, &crtc->base);
list_del(&crtc->head);
dev->mode_config.num_crtc--;
drm_modeset_lock_all(dev);
- ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
+ ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, NULL);
if (ret)
goto out_unlock;
ida_remove(&config->connector_ida, connector->connector_id);
out_put:
if (ret)
- drm_mode_object_put(dev, &connector->base);
+ drm_mode_object_unregister(dev, &connector->base);
out_unlock:
drm_modeset_unlock_all(dev);
connector->connector_id);
kfree(connector->display_info.bus_formats);
- drm_mode_object_put(dev, &connector->base);
+ drm_mode_object_unregister(dev, &connector->base);
kfree(connector->name);
connector->name = NULL;
list_del(&connector->head);
}
EXPORT_SYMBOL(drm_connector_unregister);
+/**
+ * drm_connector_register_all - register all connectors
+ * @dev: drm device
+ *
+ * This function registers all connectors in sysfs and other places so that
+ * userspace can start to access them. Drivers can call it after calling
+ * drm_dev_register() to complete the device registration, if they don't call
+ * drm_connector_register() on each connector individually.
+ *
+ * When a device is unplugged and should be removed from userspace access,
+ * call drm_connector_unregister_all(), which is the inverse of this
+ * function.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_connector_register_all(struct drm_device *dev)
+{
+ struct drm_connector *connector;
+ int ret;
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ drm_for_each_connector(connector, dev) {
+ ret = drm_connector_register(connector);
+ if (ret)
+ goto err;
+ }
+
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return 0;
+
+err:
+ mutex_unlock(&dev->mode_config.mutex);
+ drm_connector_unregister_all(dev);
+ return ret;
+}
+EXPORT_SYMBOL(drm_connector_register_all);
/**
- * drm_connector_unplug_all - unregister connector userspace interfaces
+ * drm_connector_unregister_all - unregister connector userspace interfaces
* @dev: drm device
*
- * This function unregisters all connector userspace interfaces in sysfs. Should
- * be call when the device is disconnected, e.g. from an usb driver's
- * ->disconnect callback.
+ * This functions unregisters all connectors from sysfs and other places so
+ * that userspace can no longer access them. Drivers should call this as the
+ * first step tearing down the device instace, or when the underlying
+ * physical device disappeared (e.g. USB unplug), right before calling
+ * drm_dev_unregister().
*/
-void drm_connector_unplug_all(struct drm_device *dev)
+void drm_connector_unregister_all(struct drm_device *dev)
{
struct drm_connector *connector;
/* FIXME: taking the mode config mutex ends up in a clash with sysfs */
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
drm_connector_unregister(connector);
-
}
-EXPORT_SYMBOL(drm_connector_unplug_all);
+EXPORT_SYMBOL(drm_connector_unregister_all);
/**
* drm_encoder_init - Init a preallocated encoder
out_put:
if (ret)
- drm_mode_object_put(dev, &encoder->base);
+ drm_mode_object_unregister(dev, &encoder->base);
out_unlock:
drm_modeset_unlock_all(dev);
struct drm_device *dev = encoder->dev;
drm_modeset_lock_all(dev);
- drm_mode_object_put(dev, &encoder->base);
+ drm_mode_object_unregister(dev, &encoder->base);
kfree(encoder->name);
list_del(&encoder->head);
dev->mode_config.num_encoder--;
GFP_KERNEL);
if (!plane->format_types) {
DRM_DEBUG_KMS("out of memory when allocating plane\n");
- drm_mode_object_put(dev, &plane->base);
+ drm_mode_object_unregister(dev, &plane->base);
return -ENOMEM;
}
}
if (!plane->name) {
kfree(plane->format_types);
- drm_mode_object_put(dev, &plane->base);
+ drm_mode_object_unregister(dev, &plane->base);
return -ENOMEM;
}
drm_modeset_lock_all(dev);
kfree(plane->format_types);
- drm_mode_object_put(dev, &plane->base);
+ drm_mode_object_unregister(dev, &plane->base);
BUG_ON(list_empty(&plane->head));
{
struct drm_framebuffer *fb = NULL;
struct drm_framebuffer *fbl = NULL;
+ struct drm_mode_object *obj;
uint32_t *id = data;
int found = 0;
mutex_lock(&file_priv->fbs_lock);
mutex_lock(&dev->mode_config.fb_lock);
- fb = __drm_framebuffer_lookup(dev, *id);
- if (!fb)
+ obj = _object_find(dev, *id, DRM_MODE_OBJECT_FB);
+ if (!obj)
goto fail_lookup;
-
+ fb = obj_to_fb(obj);
list_for_each_entry(fbl, &file_priv->fbs, filp_head)
if (fb == fbl)
found = 1;
if (property->num_values)
kfree(property->values);
- drm_mode_object_put(dev, &property->base);
+ drm_mode_object_unregister(dev, &property->base);
list_del(&property->head);
kfree(property);
}
list_del(&blob->head_global);
list_del(&blob->head_file);
- drm_mode_object_put(blob->dev, &blob->base);
+ drm_mode_object_unregister(blob->dev, &blob->base);
kfree(blob);
}
drm_property_destroy(dev, property);
}
+ list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
+ head) {
+ plane->funcs->destroy(plane);
+ }
+
+ list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
+ crtc->funcs->destroy(crtc);
+ }
+
list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
head_global) {
drm_property_unreference_blob(blob);
*/
WARN_ON(!list_empty(&dev->mode_config.fb_list));
list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
- drm_framebuffer_free(&fb->refcount);
- }
-
- list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
- head) {
- plane->funcs->destroy(plane);
- }
-
- list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
- crtc->funcs->destroy(crtc);
+ drm_framebuffer_free(&fb->base.refcount);
}
ida_destroy(&dev->mode_config.connector_ida);
projects / linux-2.6-block.git / blobdiff