--- /dev/null
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include <core/object.h>
+#include <core/engine.h>
+
+#ifdef NVKM_OBJECT_MAGIC
+static struct list_head _objlist = LIST_HEAD_INIT(_objlist);
+static DEFINE_SPINLOCK(_objlist_lock);
+#endif
+
+int
+nvkm_object_create_(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, u32 pclass,
+ int size, void **pobject)
+{
+ struct nvkm_object *object;
+
+ object = *pobject = kzalloc(size, GFP_KERNEL);
+ if (!object)
+ return -ENOMEM;
+
+ nvkm_object_ref(parent, &object->parent);
+ nvkm_object_ref(engine, (struct nvkm_object **)&object->engine);
+ object->oclass = oclass;
+ object->oclass->handle |= pclass;
+ atomic_set(&object->refcount, 1);
+ atomic_set(&object->usecount, 0);
+
+#ifdef NVKM_OBJECT_MAGIC
+ object->_magic = NVKM_OBJECT_MAGIC;
+ spin_lock(&_objlist_lock);
+ list_add(&object->list, &_objlist);
+ spin_unlock(&_objlist_lock);
+#endif
+ return 0;
+}
+
+int
+_nvkm_object_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, void *data, u32 size,
+ struct nvkm_object **pobject)
+{
+ if (size != 0)
+ return -ENOSYS;
+ return nvkm_object_create(parent, engine, oclass, 0, pobject);
+}
+
+void
+nvkm_object_destroy(struct nvkm_object *object)
+{
+#ifdef NVKM_OBJECT_MAGIC
+ spin_lock(&_objlist_lock);
+ list_del(&object->list);
+ spin_unlock(&_objlist_lock);
+#endif
+ nvkm_object_ref(NULL, (struct nvkm_object **)&object->engine);
+ nvkm_object_ref(NULL, &object->parent);
+ kfree(object);
+}
+
+int
+nvkm_object_init(struct nvkm_object *object)
+{
+ return 0;
+}
+
+int
+nvkm_object_fini(struct nvkm_object *object, bool suspend)
+{
+ return 0;
+}
+
+struct nvkm_ofuncs
+nvkm_object_ofuncs = {
+ .ctor = _nvkm_object_ctor,
+ .dtor = nvkm_object_destroy,
+ .init = nvkm_object_init,
+ .fini = nvkm_object_fini,
+};
+
+int
+nvkm_object_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+ struct nvkm_oclass *oclass, void *data, u32 size,
+ struct nvkm_object **pobject)
+{
+ struct nvkm_ofuncs *ofuncs = oclass->ofuncs;
+ struct nvkm_object *object = NULL;
+ int ret;
+
+ ret = ofuncs->ctor(parent, engine, oclass, data, size, &object);
+ *pobject = object;
+ if (ret < 0) {
+ if (ret != -ENODEV) {
+ nv_error(parent, "failed to create 0x%08x, %d\n",
+ oclass->handle, ret);
+ }
+
+ if (object) {
+ ofuncs->dtor(object);
+ *pobject = NULL;
+ }
+
+ return ret;
+ }
+
+ if (ret == 0) {
+ nv_trace(object, "created\n");
+ atomic_set(&object->refcount, 1);
+ }
+
+ return 0;
+}
+
+static void
+nvkm_object_dtor(struct nvkm_object *object)
+{
+ nv_trace(object, "destroying\n");
+ nv_ofuncs(object)->dtor(object);
+}
+
+void
+nvkm_object_ref(struct nvkm_object *obj, struct nvkm_object **ref)
+{
+ if (obj) {
+ atomic_inc(&obj->refcount);
+ nv_trace(obj, "inc() == %d\n", atomic_read(&obj->refcount));
+ }
+
+ if (*ref) {
+ int dead = atomic_dec_and_test(&(*ref)->refcount);
+ nv_trace(*ref, "dec() == %d\n", atomic_read(&(*ref)->refcount));
+ if (dead)
+ nvkm_object_dtor(*ref);
+ }
+
+ *ref = obj;
+}
+
+int
+nvkm_object_inc(struct nvkm_object *object)
+{
+ int ref = atomic_add_return(1, &object->usecount);
+ int ret;
+
+ nv_trace(object, "use(+1) == %d\n", atomic_read(&object->usecount));
+ if (ref != 1)
+ return 0;
+
+ nv_trace(object, "initialising...\n");
+ if (object->parent) {
+ ret = nvkm_object_inc(object->parent);
+ if (ret) {
+ nv_error(object, "parent failed, %d\n", ret);
+ goto fail_parent;
+ }
+ }
+
+ if (object->engine) {
+ mutex_lock(&nv_subdev(object->engine)->mutex);
+ ret = nvkm_object_inc(&object->engine->subdev.object);
+ mutex_unlock(&nv_subdev(object->engine)->mutex);
+ if (ret) {
+ nv_error(object, "engine failed, %d\n", ret);
+ goto fail_engine;
+ }
+ }
+
+ ret = nv_ofuncs(object)->init(object);
+ atomic_set(&object->usecount, 1);
+ if (ret) {
+ nv_error(object, "init failed, %d\n", ret);
+ goto fail_self;
+ }
+
+ nv_trace(object, "initialised\n");
+ return 0;
+
+fail_self:
+ if (object->engine) {
+ mutex_lock(&nv_subdev(object->engine)->mutex);
+ nvkm_object_dec(&object->engine->subdev.object, false);
+ mutex_unlock(&nv_subdev(object->engine)->mutex);
+ }
+fail_engine:
+ if (object->parent)
+ nvkm_object_dec(object->parent, false);
+fail_parent:
+ atomic_dec(&object->usecount);
+ return ret;
+}
+
+static int
+nvkm_object_decf(struct nvkm_object *object)
+{
+ int ret;
+
+ nv_trace(object, "stopping...\n");
+
+ ret = nv_ofuncs(object)->fini(object, false);
+ atomic_set(&object->usecount, 0);
+ if (ret)
+ nv_warn(object, "failed fini, %d\n", ret);
+
+ if (object->engine) {
+ mutex_lock(&nv_subdev(object->engine)->mutex);
+ nvkm_object_dec(&object->engine->subdev.object, false);
+ mutex_unlock(&nv_subdev(object->engine)->mutex);
+ }
+
+ if (object->parent)
+ nvkm_object_dec(object->parent, false);
+
+ nv_trace(object, "stopped\n");
+ return 0;
+}
+
+static int
+nvkm_object_decs(struct nvkm_object *object)
+{
+ int ret, rret;
+
+ nv_trace(object, "suspending...\n");
+
+ ret = nv_ofuncs(object)->fini(object, true);
+ atomic_set(&object->usecount, 0);
+ if (ret) {
+ nv_error(object, "failed suspend, %d\n", ret);
+ return ret;
+ }
+
+ if (object->engine) {
+ mutex_lock(&nv_subdev(object->engine)->mutex);
+ ret = nvkm_object_dec(&object->engine->subdev.object, true);
+ mutex_unlock(&nv_subdev(object->engine)->mutex);
+ if (ret) {
+ nv_warn(object, "engine failed suspend, %d\n", ret);
+ goto fail_engine;
+ }
+ }
+
+ if (object->parent) {
+ ret = nvkm_object_dec(object->parent, true);
+ if (ret) {
+ nv_warn(object, "parent failed suspend, %d\n", ret);
+ goto fail_parent;
+ }
+ }
+
+ nv_trace(object, "suspended\n");
+ return 0;
+
+fail_parent:
+ if (object->engine) {
+ mutex_lock(&nv_subdev(object->engine)->mutex);
+ rret = nvkm_object_inc(&object->engine->subdev.object);
+ mutex_unlock(&nv_subdev(object->engine)->mutex);
+ if (rret)
+ nv_fatal(object, "engine failed to reinit, %d\n", rret);
+ }
+
+fail_engine:
+ rret = nv_ofuncs(object)->init(object);
+ if (rret)
+ nv_fatal(object, "failed to reinit, %d\n", rret);
+
+ return ret;
+}
+
+int
+nvkm_object_dec(struct nvkm_object *object, bool suspend)
+{
+ int ref = atomic_add_return(-1, &object->usecount);
+ int ret;
+
+ nv_trace(object, "use(-1) == %d\n", atomic_read(&object->usecount));
+
+ if (ref == 0) {
+ if (suspend)
+ ret = nvkm_object_decs(object);
+ else
+ ret = nvkm_object_decf(object);
+
+ if (ret) {
+ atomic_inc(&object->usecount);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+void
+nvkm_object_debug(void)
+{
+#ifdef NVKM_OBJECT_MAGIC
+ struct nvkm_object *object;
+ if (!list_empty(&_objlist)) {
+ nv_fatal(NULL, "*******************************************\n");
+ nv_fatal(NULL, "* AIIIII! object(s) still exist!!!\n");
+ nv_fatal(NULL, "*******************************************\n");
+ list_for_each_entry(object, &_objlist, list) {
+ nv_fatal(object, "%p/%p/%d/%d\n",
+ object->parent, object->engine,
+ atomic_read(&object->refcount),
+ atomic_read(&object->usecount));
+ }
+ }
+#endif
+}
Code Review / kvmfornfv.git / blobdiff