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1/*2 * Copyright 2012 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#include "nouveau_drv.h"25#include "nouveau_dma.h"26#include "nouveau_fence.h"27 28#include <nvif/if0004.h>29#include <nvif/push006c.h>30 31struct nv04_fence_chan {32 struct nouveau_fence_chan base;33};34 35struct nv04_fence_priv {36 struct nouveau_fence_priv base;37};38 39static int40nv04_fence_emit(struct nouveau_fence *fence)41{42 struct nvif_push *push = &unrcu_pointer(fence->channel)->chan.push;43 int ret = PUSH_WAIT(push, 2);44 if (ret == 0) {45 PUSH_NVSQ(push, NV_SW, 0x0150, fence->base.seqno);46 PUSH_KICK(push);47 }48 return ret;49}50 51static int52nv04_fence_sync(struct nouveau_fence *fence,53 struct nouveau_channel *prev, struct nouveau_channel *chan)54{55 return -ENODEV;56}57 58static u3259nv04_fence_read(struct nouveau_channel *chan)60{61 struct nv04_nvsw_get_ref_v0 args = {};62 WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,63 &args, sizeof(args)));64 return args.ref;65}66 67static void68nv04_fence_context_del(struct nouveau_channel *chan)69{70 struct nv04_fence_chan *fctx = chan->fence;71 nouveau_fence_context_del(&fctx->base);72 chan->fence = NULL;73 nouveau_fence_context_free(&fctx->base);74}75 76static int77nv04_fence_context_new(struct nouveau_channel *chan)78{79 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);80 if (fctx) {81 nouveau_fence_context_new(chan, &fctx->base);82 fctx->base.emit = nv04_fence_emit;83 fctx->base.sync = nv04_fence_sync;84 fctx->base.read = nv04_fence_read;85 chan->fence = fctx;86 return 0;87 }88 return -ENOMEM;89}90 91static void92nv04_fence_destroy(struct nouveau_drm *drm)93{94 struct nv04_fence_priv *priv = drm->fence;95 drm->fence = NULL;96 kfree(priv);97}98 99int100nv04_fence_create(struct nouveau_drm *drm)101{102 struct nv04_fence_priv *priv;103 104 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);105 if (!priv)106 return -ENOMEM;107 108 priv->base.dtor = nv04_fence_destroy;109 priv->base.context_new = nv04_fence_context_new;110 priv->base.context_del = nv04_fence_context_del;111 return 0;112}113