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/*
* 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/namedb.h>
#include <core/handle.h>
#include <core/client.h>
#include <core/engctx.h>
#include <subdev/vm.h>
static inline int
nouveau_engctx_exists(struct nouveau_object *parent,
struct nouveau_engine *engine, void **pobject)
{
struct nouveau_engctx *engctx;
struct nouveau_object *parctx;
list_for_each_entry(engctx, &engine->contexts, head) {
parctx = nv_pclass(nv_object(engctx), NV_PARENT_CLASS);
if (parctx == parent) {
atomic_inc(&nv_object(engctx)->refcount);
*pobject = engctx;
return 1;
}
}
return 0;
}
int
nouveau_engctx_create_(struct nouveau_object *parent,
struct nouveau_object *engobj,
struct nouveau_oclass *oclass,
struct nouveau_object *pargpu,
u32 size, u32 align, u32 flags,
int length, void **pobject)
{
struct nouveau_client *client = nouveau_client(parent);
struct nouveau_engine *engine = nv_engine(engobj);
struct nouveau_object *engctx;
unsigned long save;
int ret;
/* check if this engine already has a context for the parent object,
* and reference it instead of creating a new one
*/
spin_lock_irqsave(&engine->lock, save);
ret = nouveau_engctx_exists(parent, engine, pobject);
spin_unlock_irqrestore(&engine->lock, save);
if (ret)
return ret;
/* create the new context, supports creating both raw objects and
* objects backed by instance memory
*/
if (size) {
ret = nouveau_gpuobj_create_(parent, engobj, oclass,
NV_ENGCTX_CLASS,
pargpu, size, align, flags,
length, pobject);
} else {
ret = nouveau_object_create_(parent, engobj, oclass,
NV_ENGCTX_CLASS, length, pobject);
}
engctx = *pobject;
if (ret)
return ret;
/* must take the lock again and re-check a context doesn't already
* exist (in case of a race) - the lock had to be dropped before as
* it's not possible to allocate the object with it held.
*/
spin_lock_irqsave(&engine->lock, save);
ret = nouveau_engctx_exists(parent, engine, pobject);
if (ret) {
spin_unlock_irqrestore(&engine->lock, save);
nouveau_object_ref(NULL, &engctx);
return ret;
}
if (client->vm)
atomic_inc(&client->vm->engref[nv_engidx(engobj)]);
list_add(&nv_engctx(engctx)->head, &engine->contexts);
nv_engctx(engctx)->addr = ~0ULL;
spin_unlock_irqrestore(&engine->lock, save);
return 0;
}
void
nouveau_engctx_destroy(struct nouveau_engctx *engctx)
{
struct nouveau_object *engobj = nv_object(engctx)->engine;
struct nouveau_engine *engine = nv_engine(engobj);
struct nouveau_client *client = nouveau_client(engctx);
unsigned long save;
nouveau_gpuobj_unmap(&engctx->vma);
spin_lock_irqsave(&engine->lock, save);
list_del(&engctx->head);
spin_unlock_irqrestore(&engine->lock, save);
if (client->vm)
atomic_dec(&client->vm->engref[nv_engidx(engobj)]);
if (engctx->base.size)
nouveau_gpuobj_destroy(&engctx->base);
else
nouveau_object_destroy(&engctx->base.base);
}
int
nouveau_engctx_init(struct nouveau_engctx *engctx)
{
struct nouveau_object *object = nv_object(engctx);
struct nouveau_subdev *subdev = nv_subdev(object->engine);
struct nouveau_object *parent;
struct nouveau_subdev *pardev;
int ret;
ret = nouveau_gpuobj_init(&engctx->base);
if (ret)
return ret;
parent = nv_pclass(object->parent, NV_PARENT_CLASS);
pardev = nv_subdev(parent->engine);
if (nv_parent(parent)->context_attach) {
mutex_lock(&pardev->mutex);
ret = nv_parent(parent)->context_attach(parent, object);
mutex_unlock(&pardev->mutex);
}
if (ret) {
nv_error(parent, "failed to attach %s context, %d\n",
subdev->name, ret);
return ret;
}
nv_debug(parent, "attached %s context\n", subdev->name);
return 0;
}
int
nouveau_engctx_fini(struct nouveau_engctx *engctx, bool suspend)
{
struct nouveau_object *object = nv_object(engctx);
struct nouveau_subdev *subdev = nv_subdev(object->engine);
struct nouveau_object *parent;
struct nouveau_subdev *pardev;
int ret = 0;
parent = nv_pclass(object->parent, NV_PARENT_CLASS);
pardev = nv_subdev(parent->engine);
if (nv_parent(parent)->context_detach) {
mutex_lock(&pardev->mutex);
ret = nv_parent(parent)->context_detach(parent, suspend, object);
mutex_unlock(&pardev->mutex);
}
if (ret) {
nv_error(parent, "failed to detach %s context, %d\n",
subdev->name, ret);
return ret;
}
nv_debug(parent, "detached %s context\n", subdev->name);
return nouveau_gpuobj_fini(&engctx->base, suspend);
}
void
_nouveau_engctx_dtor(struct nouveau_object *object)
{
nouveau_engctx_destroy(nv_engctx(object));
}
int
_nouveau_engctx_init(struct nouveau_object *object)
{
return nouveau_engctx_init(nv_engctx(object));
}
int
_nouveau_engctx_fini(struct nouveau_object *object, bool suspend)
{
return nouveau_engctx_fini(nv_engctx(object), suspend);
}
struct nouveau_object *
nouveau_engctx_get(struct nouveau_engine *engine, u64 addr)
{
struct nouveau_engctx *engctx;
unsigned long flags;
spin_lock_irqsave(&engine->lock, flags);
list_for_each_entry(engctx, &engine->contexts, head) {
if (engctx->addr == addr) {
engctx->save = flags;
return nv_object(engctx);
}
}
spin_unlock_irqrestore(&engine->lock, flags);
return NULL;
}
void
nouveau_engctx_put(struct nouveau_object *object)
{
if (object) {
struct nouveau_engine *engine = nv_engine(object->engine);
struct nouveau_engctx *engctx = nv_engctx(object);
spin_unlock_irqrestore(&engine->lock, engctx->save);
}
}
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