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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 "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_fence.h"
struct nv04_fence_chan {
struct nouveau_fence_chan base;
};
struct nv04_fence_priv {
struct nouveau_fence_priv base;
};
static int
nv04_fence_emit(struct nouveau_fence *fence)
{
struct nouveau_channel *chan = fence->channel;
int ret = RING_SPACE(chan, 2);
if (ret == 0) {
BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
OUT_RING (chan, fence->sequence);
FIRE_RING (chan);
}
return ret;
}
static int
nv04_fence_sync(struct nouveau_fence *fence,
struct nouveau_channel *prev, struct nouveau_channel *chan)
{
return -ENODEV;
}
static u32
nv04_fence_read(struct nouveau_channel *chan)
{
struct nouveau_fifo_chan *fifo = nvkm_fifo_chan(chan);;
return atomic_read(&fifo->refcnt);
}
static void
nv04_fence_context_del(struct nouveau_channel *chan)
{
struct nv04_fence_chan *fctx = chan->fence;
nouveau_fence_context_del(&fctx->base);
chan->fence = NULL;
kfree(fctx);
}
static int
nv04_fence_context_new(struct nouveau_channel *chan)
{
struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
if (fctx) {
nouveau_fence_context_new(&fctx->base);
fctx->base.emit = nv04_fence_emit;
fctx->base.sync = nv04_fence_sync;
fctx->base.read = nv04_fence_read;
chan->fence = fctx;
return 0;
}
return -ENOMEM;
}
static void
nv04_fence_destroy(struct nouveau_drm *drm)
{
struct nv04_fence_priv *priv = drm->fence;
drm->fence = NULL;
kfree(priv);
}
int
nv04_fence_create(struct nouveau_drm *drm)
{
struct nv04_fence_priv *priv;
priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->base.dtor = nv04_fence_destroy;
priv->base.context_new = nv04_fence_context_new;
priv->base.context_del = nv04_fence_context_del;
return 0;
}
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