| /* |
| * 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 |
| } |