+++ /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/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);
- }
-}
Code Review / kvmfornfv.git / blobdiff