1/*
  2 * Copyright 2012 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * 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 OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs <bskeggs@redhat.com>
 23 */
 24
 25#include "nouveau_drv.h"
 26#include "nouveau_dma.h"
 27#include "nv10_fence.h"
 28
 29int
 30nv10_fence_emit(struct nouveau_fence *fence)
 31{
 32	struct nouveau_channel *chan = fence->channel;
 33	int ret = RING_SPACE(chan, 2);
 34	if (ret == 0) {
 35		BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
 36		OUT_RING  (chan, fence->base.seqno);
 37		FIRE_RING (chan);
 38	}
 39	return ret;
 40}
 41
 42
 43static int
 44nv10_fence_sync(struct nouveau_fence *fence,
 45		struct nouveau_channel *prev, struct nouveau_channel *chan)
 46{
 47	return -ENODEV;
 48}
 49
 50u32
 51nv10_fence_read(struct nouveau_channel *chan)
 52{
 53	return nvif_rd32(&chan->user, 0x0048);
 54}
 55
 56void
 57nv10_fence_context_del(struct nouveau_channel *chan)
 58{
 59	struct nv10_fence_chan *fctx = chan->fence;
 60	nouveau_fence_context_del(&fctx->base);
 61	nvif_object_fini(&fctx->sema);
 62	chan->fence = NULL;
 63	nouveau_fence_context_free(&fctx->base);
 64}
 65
 66static int
 67nv10_fence_context_new(struct nouveau_channel *chan)
 68{
 69	struct nv10_fence_chan *fctx;
 70
 71	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
 72	if (!fctx)
 73		return -ENOMEM;
 74
 75	nouveau_fence_context_new(chan, &fctx->base);
 76	fctx->base.emit = nv10_fence_emit;
 77	fctx->base.read = nv10_fence_read;
 78	fctx->base.sync = nv10_fence_sync;
 79	return 0;
 80}
 81
 82void
 83nv10_fence_destroy(struct nouveau_drm *drm)
 84{
 85	struct nv10_fence_priv *priv = drm->fence;
 86	nouveau_bo_unmap(priv->bo);
 87	if (priv->bo)
 88		nouveau_bo_unpin(priv->bo);
 89	nouveau_bo_ref(NULL, &priv->bo);
 90	drm->fence = NULL;
 91	kfree(priv);
 92}
 93
 94int
 95nv10_fence_create(struct nouveau_drm *drm)
 96{
 97	struct nv10_fence_priv *priv;
 98
 99	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
100	if (!priv)
101		return -ENOMEM;
102
103	priv->base.dtor = nv10_fence_destroy;
104	priv->base.context_new = nv10_fence_context_new;
105	priv->base.context_del = nv10_fence_context_del;
106	priv->base.contexts = 31;
107	priv->base.context_base = dma_fence_context_alloc(priv->base.contexts);
108	spin_lock_init(&priv->lock);
109	return 0;
110}