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
23 */
24
25#include "nouveau_drm.h"
26#include "nouveau_dma.h"
27#include "nouveau_fence.h"
28
29struct nv04_fence_chan {
30	struct nouveau_fence_chan base;
31};
32
33struct nv04_fence_priv {
34	struct nouveau_fence_priv base;
35};
36
37static int
38nv04_fence_emit(struct nouveau_fence *fence)
39{
40	struct nouveau_channel *chan = fence->channel;
41	int ret = RING_SPACE(chan, 2);
42	if (ret == 0) {
43		BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
44		OUT_RING  (chan, fence->base.seqno);
45		FIRE_RING (chan);
46	}
47	return ret;
48}
49
50static int
51nv04_fence_sync(struct nouveau_fence *fence,
52		struct nouveau_channel *prev, struct nouveau_channel *chan)
53{
54	return -ENODEV;
55}
56
57static u32
58nv04_fence_read(struct nouveau_channel *chan)
59{
60	struct nvkm_fifo_chan *fifo = nvxx_fifo_chan(chan);;
61	return atomic_read(&fifo->refcnt);
62}
63
64static void
65nv04_fence_context_del(struct nouveau_channel *chan)
66{
67	struct nv04_fence_chan *fctx = chan->fence;
68	nouveau_fence_context_del(&fctx->base);
69	chan->fence = NULL;
70	nouveau_fence_context_free(&fctx->base);
71}
72
73static int
74nv04_fence_context_new(struct nouveau_channel *chan)
75{
76	struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
77	if (fctx) {
78		nouveau_fence_context_new(chan, &fctx->base);
79		fctx->base.emit = nv04_fence_emit;
80		fctx->base.sync = nv04_fence_sync;
81		fctx->base.read = nv04_fence_read;
82		chan->fence = fctx;
83		return 0;
84	}
85	return -ENOMEM;
86}
87
88static void
89nv04_fence_destroy(struct nouveau_drm *drm)
90{
91	struct nv04_fence_priv *priv = drm->fence;
92	drm->fence = NULL;
93	kfree(priv);
94}
95
96int
97nv04_fence_create(struct nouveau_drm *drm)
98{
99	struct nv04_fence_priv *priv;
100
101	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
102	if (!priv)
103		return -ENOMEM;
104
105	priv->base.dtor = nv04_fence_destroy;
106	priv->base.context_new = nv04_fence_context_new;
107	priv->base.context_del = nv04_fence_context_del;
108	priv->base.contexts = 15;
109	priv->base.context_base = fence_context_alloc(priv->base.contexts);
110	return 0;
111}
112