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// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include "i915_sw_fence_work.h"
static void fence_complete(struct dma_fence_work *f)
{
if (f->ops->release)
f->ops->release(f);
dma_fence_signal(&f->dma);
}
static void fence_work(struct work_struct *work)
{
struct dma_fence_work *f = container_of(work, typeof(*f), work);
f->ops->work(f);
fence_complete(f);
dma_fence_put(&f->dma);
}
static int
fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{
struct dma_fence_work *f = container_of(fence, typeof(*f), chain);
switch (state) {
case FENCE_COMPLETE:
if (fence->error)
dma_fence_set_error(&f->dma, fence->error);
if (!f->dma.error) {
dma_fence_get(&f->dma);
if (test_bit(DMA_FENCE_WORK_IMM, &f->dma.flags))
fence_work(&f->work);
else
queue_work(system_unbound_wq, &f->work);
} else {
fence_complete(f);
}
break;
case FENCE_FREE:
dma_fence_put(&f->dma);
break;
}
return NOTIFY_DONE;
}
static const char *get_driver_name(struct dma_fence *fence)
{
return "dma-fence";
}
static const char *get_timeline_name(struct dma_fence *fence)
{
struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
return f->ops->name ?: "work";
}
static void fence_release(struct dma_fence *fence)
{
struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
i915_sw_fence_fini(&f->chain);
BUILD_BUG_ON(offsetof(typeof(*f), dma));
dma_fence_free(&f->dma);
}
static const struct dma_fence_ops fence_ops = {
.get_driver_name = get_driver_name,
.get_timeline_name = get_timeline_name,
.release = fence_release,
};
void dma_fence_work_init(struct dma_fence_work *f,
const struct dma_fence_work_ops *ops)
{
f->ops = ops;
spin_lock_init(&f->lock);
dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0);
i915_sw_fence_init(&f->chain, fence_notify);
INIT_WORK(&f->work, fence_work);
}
int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal)
{
if (!signal)
return 0;
return __i915_sw_fence_await_dma_fence(&f->chain, signal, &f->cb);
}
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