mirror of https://gitee.com/openkylin/linux.git
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "nouveau_drm.h"
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#include "nouveau_dma.h"
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#include "nouveau_fence.h"
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struct nv04_fence_chan {
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struct nouveau_fence_chan base;
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};
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struct nv04_fence_priv {
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struct nouveau_fence_priv base;
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};
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static int
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nv04_fence_emit(struct nouveau_fence *fence)
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{
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struct nouveau_channel *chan = fence->channel;
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int ret = RING_SPACE(chan, 2);
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if (ret == 0) {
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BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
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OUT_RING (chan, fence->base.seqno);
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FIRE_RING (chan);
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}
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return ret;
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}
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static int
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nv04_fence_sync(struct nouveau_fence *fence,
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struct nouveau_channel *prev, struct nouveau_channel *chan)
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{
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return -ENODEV;
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}
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static u32
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nv04_fence_read(struct nouveau_channel *chan)
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{
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struct nouveau_fifo_chan *fifo = nvkm_fifo_chan(chan);;
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return atomic_read(&fifo->refcnt);
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}
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static void
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nv04_fence_context_del(struct nouveau_channel *chan)
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{
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struct nv04_fence_chan *fctx = chan->fence;
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nouveau_fence_context_del(&fctx->base);
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chan->fence = NULL;
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nouveau_fence_context_free(&fctx->base);
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}
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static int
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nv04_fence_context_new(struct nouveau_channel *chan)
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{
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struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
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if (fctx) {
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nouveau_fence_context_new(chan, &fctx->base);
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fctx->base.emit = nv04_fence_emit;
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fctx->base.sync = nv04_fence_sync;
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fctx->base.read = nv04_fence_read;
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chan->fence = fctx;
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return 0;
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}
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return -ENOMEM;
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}
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static void
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nv04_fence_destroy(struct nouveau_drm *drm)
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{
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struct nv04_fence_priv *priv = drm->fence;
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drm->fence = NULL;
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kfree(priv);
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}
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int
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nv04_fence_create(struct nouveau_drm *drm)
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{
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struct nv04_fence_priv *priv;
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priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->base.dtor = nv04_fence_destroy;
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priv->base.context_new = nv04_fence_context_new;
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priv->base.context_del = nv04_fence_context_del;
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priv->base.contexts = 15;
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priv->base.context_base = fence_context_alloc(priv->base.contexts);
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return 0;
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}
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