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_drm.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, 0x0048);
54}
55
56void
57nv10_fence_context_del(struct nouveau_channel *chan)
58{
59	struct nv10_fence_chan *fctx = chan->fence;
60	int i;
61	nouveau_fence_context_del(&fctx->base);
62	for (i = 0; i < ARRAY_SIZE(fctx->head); i++)
63		nvif_object_fini(&fctx->head[i]);
64	nvif_object_fini(&fctx->sema);
65	chan->fence = NULL;
66	nouveau_fence_context_free(&fctx->base);
67}
68
69int
70nv10_fence_context_new(struct nouveau_channel *chan)
71{
72	struct nv10_fence_chan *fctx;
73
74	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
75	if (!fctx)
76		return -ENOMEM;
77
78	nouveau_fence_context_new(chan, &fctx->base);
79	fctx->base.emit = nv10_fence_emit;
80	fctx->base.read = nv10_fence_read;
81	fctx->base.sync = nv10_fence_sync;
82	return 0;
83}
84
85void
86nv10_fence_destroy(struct nouveau_drm *drm)
87{
88	struct nv10_fence_priv *priv = drm->fence;
89	nouveau_bo_unmap(priv->bo);
90	if (priv->bo)
91		nouveau_bo_unpin(priv->bo);
92	nouveau_bo_ref(NULL, &priv->bo);
93	drm->fence = NULL;
94	kfree(priv);
95}
96
97int
98nv10_fence_create(struct nouveau_drm *drm)
99{
100	struct nv10_fence_priv *priv;
101
102	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
103	if (!priv)
104		return -ENOMEM;
105
106	priv->base.dtor = nv10_fence_destroy;
107	priv->base.context_new = nv10_fence_context_new;
108	priv->base.context_del = nv10_fence_context_del;
109	priv->base.contexts = 31;
110	priv->base.context_base = fence_context_alloc(priv->base.contexts);
111	spin_lock_init(&priv->lock);
112	return 0;
113}
114