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/*
* Copyright 2007 Nouveau Project
*
* 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 AUTHORS 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.
*/
#include <stdlib.h>
#include <errno.h>
#include "nouveau_drmif.h"
#include "nouveau_dma.h"
#include "nouveau_local.h"
int
nouveau_fence_new(struct nouveau_channel *chan, struct nouveau_fence **fence)
{
struct nouveau_fence_priv *nvfence;
if (!chan || !fence || *fence)
return -EINVAL;
nvfence = calloc(1, sizeof(struct nouveau_fence_priv));
if (!nvfence)
return -ENOMEM;
nvfence->base.channel = chan;
nvfence->refcount = 1;
*fence = &nvfence->base;
return 0;
}
int
nouveau_fence_ref(struct nouveau_fence *ref, struct nouveau_fence **fence)
{
struct nouveau_fence_priv *nvfence;
if (!ref || !fence || *fence)
return -EINVAL;
nvfence = nouveau_fence(ref);
nvfence->refcount++;
*fence = &nvfence->base;
return 0;
}
void
nouveau_fence_del(struct nouveau_fence **fence)
{
struct nouveau_fence_priv *nvfence;
if (!fence || !*fence)
return;
nvfence = nouveau_fence(*fence);
*fence = NULL;
if (--nvfence->refcount <= 0) {
if (nvfence->emitted && !nvfence->signalled)
nouveau_fence_wait((void *)&nvfence);
free(nvfence);
}
}
void
nouveau_fence_emit(struct nouveau_fence *fence)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(fence->channel);
struct nouveau_fence_priv *nvfence = nouveau_fence(fence);
nvfence->emitted = 1;
nvfence->sequence = ++nvchan->fence_sequence;
if (nvfence->sequence == 0xffffffff)
NOUVEAU_ERR("AII wrap unhandled\n");
BEGIN_RING_CH(&nvchan->base, nvchan->subchannel[0].grobj, 0x50, 1);
OUT_RING_CH (&nvchan->base, nvfence->sequence);
if (nvchan->fence_tail) {
nouveau_fence(nvchan->fence_tail)->next = fence;
} else {
nvchan->fence_head = fence;
}
nvchan->fence_tail = fence;
}
void
nouveau_fence_flush(struct nouveau_channel *chan)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_fence_priv *nvfence = nouveau_fence(nvchan->fence_head);
uint32_t sequence = *nvchan->ref_cnt;
while (nvchan->fence_head && nvfence->sequence <= sequence) {
nvfence->signalled = 1;
nvchan->fence_head = nvfence->next;
if (nvchan->fence_head == NULL)
nvchan->fence_tail = NULL;
nvfence = nouveau_fence(nvchan->fence_head);
}
}
int
nouveau_fence_wait(struct nouveau_fence **fence)
{
struct nouveau_fence_priv *nvfence;
if (!fence || !*fence)
return -EINVAL;
nvfence = nouveau_fence(*fence);
if (nvfence->emitted) {
while (!nvfence->signalled)
nouveau_fence_flush(nvfence->base.channel);
}
nouveau_fence_del(fence);
return 0;
}
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