| /* |
| * 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/parent.h> |
| #include <core/namedb.h> |
| #include <core/handle.h> |
| #include <core/engine.h> |
| |
| #ifdef NOUVEAU_OBJECT_MAGIC |
| static struct list_head _objlist = LIST_HEAD_INIT(_objlist); |
| static DEFINE_SPINLOCK(_objlist_lock); |
| #endif |
| |
| int |
| nouveau_object_create_(struct nouveau_object *parent, |
| struct nouveau_object *engine, |
| struct nouveau_oclass *oclass, u32 pclass, |
| int size, void **pobject) |
| { |
| struct nouveau_object *object; |
| |
| object = *pobject = kzalloc(size, GFP_KERNEL); |
| if (!object) |
| return -ENOMEM; |
| |
| nouveau_object_ref(parent, &object->parent); |
| nouveau_object_ref(engine, &object->engine); |
| object->oclass = oclass; |
| object->oclass->handle |= pclass; |
| atomic_set(&object->refcount, 1); |
| atomic_set(&object->usecount, 0); |
| |
| #ifdef NOUVEAU_OBJECT_MAGIC |
| object->_magic = NOUVEAU_OBJECT_MAGIC; |
| spin_lock(&_objlist_lock); |
| list_add(&object->list, &_objlist); |
| spin_unlock(&_objlist_lock); |
| #endif |
| return 0; |
| } |
| |
| static int |
| _nouveau_object_ctor(struct nouveau_object *parent, |
| struct nouveau_object *engine, |
| struct nouveau_oclass *oclass, void *data, u32 size, |
| struct nouveau_object **pobject) |
| { |
| struct nouveau_object *object; |
| int ret; |
| |
| ret = nouveau_object_create(parent, engine, oclass, 0, &object); |
| *pobject = nv_object(object); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| void |
| nouveau_object_destroy(struct nouveau_object *object) |
| { |
| #ifdef NOUVEAU_OBJECT_MAGIC |
| spin_lock(&_objlist_lock); |
| list_del(&object->list); |
| spin_unlock(&_objlist_lock); |
| #endif |
| nouveau_object_ref(NULL, &object->engine); |
| nouveau_object_ref(NULL, &object->parent); |
| kfree(object); |
| } |
| |
| static void |
| _nouveau_object_dtor(struct nouveau_object *object) |
| { |
| nouveau_object_destroy(object); |
| } |
| |
| int |
| nouveau_object_init(struct nouveau_object *object) |
| { |
| return 0; |
| } |
| |
| static int |
| _nouveau_object_init(struct nouveau_object *object) |
| { |
| return nouveau_object_init(object); |
| } |
| |
| int |
| nouveau_object_fini(struct nouveau_object *object, bool suspend) |
| { |
| return 0; |
| } |
| |
| static int |
| _nouveau_object_fini(struct nouveau_object *object, bool suspend) |
| { |
| return nouveau_object_fini(object, suspend); |
| } |
| |
| struct nouveau_ofuncs |
| nouveau_object_ofuncs = { |
| .ctor = _nouveau_object_ctor, |
| .dtor = _nouveau_object_dtor, |
| .init = _nouveau_object_init, |
| .fini = _nouveau_object_fini, |
| }; |
| |
| int |
| nouveau_object_ctor(struct nouveau_object *parent, |
| struct nouveau_object *engine, |
| struct nouveau_oclass *oclass, void *data, u32 size, |
| struct nouveau_object **pobject) |
| { |
| struct nouveau_ofuncs *ofuncs = oclass->ofuncs; |
| int ret; |
| |
| *pobject = NULL; |
| |
| ret = ofuncs->ctor(parent, engine, oclass, data, size, pobject); |
| if (ret < 0) { |
| if (ret != -ENODEV) { |
| nv_error(parent, "failed to create 0x%08x, %d\n", |
| oclass->handle, ret); |
| } |
| |
| if (*pobject) { |
| ofuncs->dtor(*pobject); |
| *pobject = NULL; |
| } |
| |
| return ret; |
| } |
| |
| nv_debug(*pobject, "created\n"); |
| return 0; |
| } |
| |
| static void |
| nouveau_object_dtor(struct nouveau_object *object) |
| { |
| nv_debug(object, "destroying\n"); |
| nv_ofuncs(object)->dtor(object); |
| } |
| |
| void |
| nouveau_object_ref(struct nouveau_object *obj, struct nouveau_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) |
| nouveau_object_dtor(*ref); |
| } |
| |
| *ref = obj; |
| } |
| |
| int |
| nouveau_object_new(struct nouveau_object *client, u32 _parent, u32 _handle, |
| u16 _oclass, void *data, u32 size, |
| struct nouveau_object **pobject) |
| { |
| struct nouveau_object *parent = NULL; |
| struct nouveau_object *engctx = NULL; |
| struct nouveau_object *object = NULL; |
| struct nouveau_object *engine; |
| struct nouveau_oclass *oclass; |
| struct nouveau_handle *handle; |
| int ret; |
| |
| /* lookup parent object and ensure it *is* a parent */ |
| parent = nouveau_handle_ref(client, _parent); |
| if (!parent) { |
| nv_error(client, "parent 0x%08x not found\n", _parent); |
| return -ENOENT; |
| } |
| |
| if (!nv_iclass(parent, NV_PARENT_CLASS)) { |
| nv_error(parent, "cannot have children\n"); |
| ret = -EINVAL; |
| goto fail_class; |
| } |
| |
| /* check that parent supports the requested subclass */ |
| ret = nouveau_parent_sclass(parent, _oclass, &engine, &oclass); |
| if (ret) { |
| nv_debug(parent, "illegal class 0x%04x\n", _oclass); |
| goto fail_class; |
| } |
| |
| /* make sure engine init has been completed *before* any objects |
| * it controls are created - the constructors may depend on |
| * state calculated at init (ie. default context construction) |
| */ |
| if (engine) { |
| ret = nouveau_object_inc(engine); |
| if (ret) |
| goto fail_class; |
| } |
| |
| /* if engine requires it, create a context object to insert |
| * between the parent and its children (eg. PGRAPH context) |
| */ |
| if (engine && nv_engine(engine)->cclass) { |
| ret = nouveau_object_ctor(parent, engine, |
| nv_engine(engine)->cclass, |
| data, size, &engctx); |
| if (ret) |
| goto fail_engctx; |
| } else { |
| nouveau_object_ref(parent, &engctx); |
| } |
| |
| /* finally, create new object and bind it to its handle */ |
| ret = nouveau_object_ctor(engctx, engine, oclass, data, size, &object); |
| *pobject = object; |
| if (ret) |
| goto fail_ctor; |
| |
| ret = nouveau_object_inc(object); |
| if (ret) |
| goto fail_init; |
| |
| ret = nouveau_handle_create(parent, _parent, _handle, object, &handle); |
| if (ret) |
| goto fail_handle; |
| |
| ret = nouveau_handle_init(handle); |
| if (ret) |
| nouveau_handle_destroy(handle); |
| |
| fail_handle: |
| nouveau_object_dec(object, false); |
| fail_init: |
| nouveau_object_ref(NULL, &object); |
| fail_ctor: |
| nouveau_object_ref(NULL, &engctx); |
| fail_engctx: |
| if (engine) |
| nouveau_object_dec(engine, false); |
| fail_class: |
| nouveau_object_ref(NULL, &parent); |
| return ret; |
| } |
| |
| int |
| nouveau_object_del(struct nouveau_object *client, u32 _parent, u32 _handle) |
| { |
| struct nouveau_object *parent = NULL; |
| struct nouveau_object *namedb = NULL; |
| struct nouveau_handle *handle = NULL; |
| |
| parent = nouveau_handle_ref(client, _parent); |
| if (!parent) |
| return -ENOENT; |
| |
| namedb = nv_pclass(parent, NV_NAMEDB_CLASS); |
| if (namedb) { |
| handle = nouveau_namedb_get(nv_namedb(namedb), _handle); |
| if (handle) { |
| nouveau_namedb_put(handle); |
| nouveau_handle_fini(handle, false); |
| nouveau_handle_destroy(handle); |
| } |
| } |
| |
| nouveau_object_ref(NULL, &parent); |
| return handle ? 0 : -EINVAL; |
| } |
| |
| int |
| nouveau_object_inc(struct nouveau_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 = nouveau_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 = nouveau_object_inc(object->engine); |
| 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); |
| if (ret) { |
| nv_error(object, "init failed, %d\n", ret); |
| goto fail_self; |
| } |
| |
| nv_debug(object, "initialised\n"); |
| return 0; |
| |
| fail_self: |
| if (object->engine) { |
| mutex_lock(&nv_subdev(object->engine)->mutex); |
| nouveau_object_dec(object->engine, false); |
| mutex_unlock(&nv_subdev(object->engine)->mutex); |
| } |
| fail_engine: |
| if (object->parent) |
| nouveau_object_dec(object->parent, false); |
| fail_parent: |
| atomic_dec(&object->usecount); |
| return ret; |
| } |
| |
| static int |
| nouveau_object_decf(struct nouveau_object *object) |
| { |
| int ret; |
| |
| nv_trace(object, "stopping...\n"); |
| |
| ret = nv_ofuncs(object)->fini(object, false); |
| if (ret) |
| nv_warn(object, "failed fini, %d\n", ret); |
| |
| if (object->engine) { |
| mutex_lock(&nv_subdev(object->engine)->mutex); |
| nouveau_object_dec(object->engine, false); |
| mutex_unlock(&nv_subdev(object->engine)->mutex); |
| } |
| |
| if (object->parent) |
| nouveau_object_dec(object->parent, false); |
| |
| nv_debug(object, "stopped\n"); |
| return 0; |
| } |
| |
| static int |
| nouveau_object_decs(struct nouveau_object *object) |
| { |
| int ret, rret; |
| |
| nv_trace(object, "suspending...\n"); |
| |
| ret = nv_ofuncs(object)->fini(object, true); |
| if (ret) { |
| nv_error(object, "failed suspend, %d\n", ret); |
| return ret; |
| } |
| |
| if (object->engine) { |
| mutex_lock(&nv_subdev(object->engine)->mutex); |
| ret = nouveau_object_dec(object->engine, 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 = nouveau_object_dec(object->parent, true); |
| if (ret) { |
| nv_warn(object, "parent failed suspend, %d\n", ret); |
| goto fail_parent; |
| } |
| } |
| |
| nv_debug(object, "suspended\n"); |
| return 0; |
| |
| fail_parent: |
| if (object->engine) { |
| mutex_lock(&nv_subdev(object->engine)->mutex); |
| rret = nouveau_object_inc(object->engine); |
| 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 |
| nouveau_object_dec(struct nouveau_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 = nouveau_object_decs(object); |
| else |
| ret = nouveau_object_decf(object); |
| |
| if (ret) { |
| atomic_inc(&object->usecount); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| void |
| nouveau_object_debug(void) |
| { |
| #ifdef NOUVEAU_OBJECT_MAGIC |
| struct nouveau_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 |
| } |