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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/engine.h>
#include <core/device.h>
#include <core/option.h>
#include <subdev/fb.h>
bool
nvkm_engine_chsw_load(struct nvkm_engine *engine)
{
if (engine->func->chsw_load)
return engine->func->chsw_load(engine);
return false;
}
void
nvkm_engine_unref(struct nvkm_engine **pengine)
{
struct nvkm_engine *engine = *pengine;
if (engine) {
if (refcount_dec_and_mutex_lock(&engine->use.refcount, &engine->use.mutex)) {
nvkm_subdev_fini(&engine->subdev, false);
engine->use.enabled = false;
mutex_unlock(&engine->use.mutex);
}
*pengine = NULL;
}
}
struct nvkm_engine *
nvkm_engine_ref(struct nvkm_engine *engine)
{
int ret;
if (engine) {
if (!refcount_inc_not_zero(&engine->use.refcount)) {
mutex_lock(&engine->use.mutex);
if (!refcount_inc_not_zero(&engine->use.refcount)) {
engine->use.enabled = true;
if ((ret = nvkm_subdev_init(&engine->subdev))) {
engine->use.enabled = false;
mutex_unlock(&engine->use.mutex);
return ERR_PTR(ret);
}
refcount_set(&engine->use.refcount, 1);
}
mutex_unlock(&engine->use.mutex);
}
}
return engine;
}
void
nvkm_engine_tile(struct nvkm_engine *engine, int region)
{
struct nvkm_fb *fb = engine->subdev.device->fb;
if (engine->func->tile)
engine->func->tile(engine, region, &fb->tile.region[region]);
}
static void
nvkm_engine_intr(struct nvkm_subdev *subdev)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
if (engine->func->intr)
engine->func->intr(engine);
}
static int
nvkm_engine_info(struct nvkm_subdev *subdev, u64 mthd, u64 *data)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
if (engine->func->info) {
if (!IS_ERR((engine = nvkm_engine_ref(engine)))) {
int ret = engine->func->info(engine, mthd, data);
nvkm_engine_unref(&engine);
return ret;
}
return PTR_ERR(engine);
}
return -ENOSYS;
}
static int
nvkm_engine_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
if (engine->func->fini)
return engine->func->fini(engine, suspend);
return 0;
}
static int
nvkm_engine_init(struct nvkm_subdev *subdev)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
struct nvkm_fb *fb = subdev->device->fb;
int ret = 0, i;
s64 time;
if (!engine->use.enabled) {
nvkm_trace(subdev, "init skipped, engine has no users\n");
return ret;
}
if (engine->func->oneinit && !engine->subdev.oneinit) {
nvkm_trace(subdev, "one-time init running...\n");
time = ktime_to_us(ktime_get());
ret = engine->func->oneinit(engine);
if (ret) {
nvkm_trace(subdev, "one-time init failed, %d\n", ret);
return ret;
}
engine->subdev.oneinit = true;
time = ktime_to_us(ktime_get()) - time;
nvkm_trace(subdev, "one-time init completed in %lldus\n", time);
}
if (engine->func->init)
ret = engine->func->init(engine);
for (i = 0; fb && i < fb->tile.regions; i++)
nvkm_engine_tile(engine, i);
return ret;
}
static int
nvkm_engine_preinit(struct nvkm_subdev *subdev)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
if (engine->func->preinit)
engine->func->preinit(engine);
return 0;
}
static void *
nvkm_engine_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_engine *engine = nvkm_engine(subdev);
if (engine->func->dtor)
return engine->func->dtor(engine);
mutex_destroy(&engine->use.mutex);
return engine;
}
const struct nvkm_subdev_func
nvkm_engine = {
.dtor = nvkm_engine_dtor,
.preinit = nvkm_engine_preinit,
.init = nvkm_engine_init,
.fini = nvkm_engine_fini,
.info = nvkm_engine_info,
.intr = nvkm_engine_intr,
};
int
nvkm_engine_ctor(const struct nvkm_engine_func *func,
struct nvkm_device *device, int index, bool enable,
struct nvkm_engine *engine)
{
nvkm_subdev_ctor(&nvkm_engine, device, index, &engine->subdev);
engine->func = func;
refcount_set(&engine->use.refcount, 0);
mutex_init(&engine->use.mutex);
if (!nvkm_boolopt(device->cfgopt, engine->subdev.name, enable)) {
nvkm_debug(&engine->subdev, "disabled\n");
return -ENODEV;
}
spin_lock_init(&engine->lock);
return 0;
}
int
nvkm_engine_new_(const struct nvkm_engine_func *func,
struct nvkm_device *device, int index, bool enable,
struct nvkm_engine **pengine)
{
if (!(*pengine = kzalloc(sizeof(**pengine), GFP_KERNEL)))
return -ENOMEM;
return nvkm_engine_ctor(func, device, index, enable, *pengine);
}
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