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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/engctx.h>
#include <core/engine.h>
#include <core/client.h>
static inline int
nvkm_engctx_exists(struct nvkm_object *parent,
struct nvkm_engine *engine, void **pobject)
{
struct nvkm_engctx *engctx;
struct nvkm_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
nvkm_engctx_create_(struct nvkm_object *parent, struct nvkm_object *engobj,
struct nvkm_oclass *oclass, struct nvkm_object *pargpu,
u32 size, u32 align, u32 flags, int length, void **pobject)
{
struct nvkm_client *client = nvkm_client(parent);
struct nvkm_engine *engine = nv_engine(engobj);
struct nvkm_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 = nvkm_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 = nvkm_gpuobj_create_(parent, engobj, oclass,
NV_ENGCTX_CLASS, pargpu, size,
align, flags, length, pobject);
} else {
ret = nvkm_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 = nvkm_engctx_exists(parent, engine, pobject);
if (ret) {
spin_unlock_irqrestore(&engine->lock, save);
nvkm_object_ref(NULL, &engctx);
return ret;
}
if (client->vm)
atomic_inc(&client->vm->engref[nv_engidx(engine)]);
list_add(&nv_engctx(engctx)->head, &engine->contexts);
nv_engctx(engctx)->addr = ~0ULL;
spin_unlock_irqrestore(&engine->lock, save);
return 0;
}
void
nvkm_engctx_destroy(struct nvkm_engctx *engctx)
{
struct nvkm_engine *engine = engctx->gpuobj.object.engine;
struct nvkm_client *client = nvkm_client(engctx);
unsigned long save;
nvkm_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(engine)]);
if (engctx->gpuobj.size)
nvkm_gpuobj_destroy(&engctx->gpuobj);
else
nvkm_object_destroy(&engctx->gpuobj.object);
}
int
nvkm_engctx_init(struct nvkm_engctx *engctx)
{
struct nvkm_object *object = nv_object(engctx);
struct nvkm_subdev *subdev = nv_subdev(object->engine);
struct nvkm_object *parent;
struct nvkm_subdev *pardev;
int ret;
ret = nvkm_gpuobj_init(&engctx->gpuobj);
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
nvkm_engctx_fini(struct nvkm_engctx *engctx, bool suspend)
{
struct nvkm_object *object = nv_object(engctx);
struct nvkm_subdev *subdev = nv_subdev(object->engine);
struct nvkm_object *parent;
struct nvkm_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 nvkm_gpuobj_fini(&engctx->gpuobj, suspend);
}
int
_nvkm_engctx_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
struct nvkm_engctx *engctx;
int ret;
ret = nvkm_engctx_create(parent, engine, oclass, NULL, 256, 256,
NVOBJ_FLAG_ZERO_ALLOC, &engctx);
*pobject = nv_object(engctx);
return ret;
}
void
_nvkm_engctx_dtor(struct nvkm_object *object)
{
nvkm_engctx_destroy(nv_engctx(object));
}
int
_nvkm_engctx_init(struct nvkm_object *object)
{
return nvkm_engctx_init(nv_engctx(object));
}
int
_nvkm_engctx_fini(struct nvkm_object *object, bool suspend)
{
return nvkm_engctx_fini(nv_engctx(object), suspend);
}
struct nvkm_object *
nvkm_engctx_get(struct nvkm_engine *engine, u64 addr)
{
struct nvkm_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
nvkm_engctx_put(struct nvkm_object *object)
{
if (object) {
struct nvkm_engine *engine = nv_engine(object->engine);
struct nvkm_engctx *engctx = nv_engctx(object);
spin_unlock_irqrestore(&engine->lock, engctx->save);
}
}
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