/*
 * 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 <bskeggs@redhat.com>
 */
#include "nouveau_drv.h"
#include "nouveau_dma.h"
#include "nv10_fence.h"

#include <nvif/push006c.h>

#include <nvhw/class/cl006e.h>

int
nv10_fence_emit(struct nouveau_fence *fence)
{
        struct nvif_push *push = &fence->channel->chan.push;
        int ret = PUSH_WAIT(push, 2);
        if (ret == 0) {
                PUSH_MTHD(push, NV06E, SET_REFERENCE, fence->base.seqno);
                PUSH_KICK(push);
        }
        return ret;
}


static int
nv10_fence_sync(struct nouveau_fence *fence,
                struct nouveau_channel *prev, struct nouveau_channel *chan)
{
        return -ENODEV;
}

u32
nv10_fence_read(struct nouveau_channel *chan)
{
        return NVIF_RD32(&chan->user, NV06E, REFERENCE);
}

void
nv10_fence_context_del(struct nouveau_channel *chan)
{
        struct nv10_fence_chan *fctx = chan->fence;
        nouveau_fence_context_del(&fctx->base);
        nvif_object_dtor(&fctx->sema);
        chan->fence = NULL;
        nouveau_fence_context_free(&fctx->base);
}

static int
nv10_fence_context_new(struct nouveau_channel *chan)
{
        struct nv10_fence_chan *fctx;

        fctx = chan->fence = kzalloc_obj(*fctx);
        if (!fctx)
                return -ENOMEM;

        nouveau_fence_context_new(chan, &fctx->base);
        fctx->base.emit = nv10_fence_emit;
        fctx->base.read = nv10_fence_read;
        fctx->base.sync = nv10_fence_sync;
        return 0;
}

void
nv10_fence_destroy(struct nouveau_drm *drm)
{
        struct nv10_fence_priv *priv = drm->fence;

        nouveau_bo_unpin_del(&priv->bo);
        drm->fence = NULL;
        kfree(priv);
}

int
nv10_fence_create(struct nouveau_drm *drm)
{
        struct nv10_fence_priv *priv;

        priv = drm->fence = kzalloc_obj(*priv);
        if (!priv)
                return -ENOMEM;

        priv->base.dtor = nv10_fence_destroy;
        priv->base.context_new = nv10_fence_context_new;
        priv->base.context_del = nv10_fence_context_del;
        spin_lock_init(&priv->lock);
        return 0;
}