1/* $NetBSD: nouveau_nv04_fence.c,v 1.1.1.1 2014/08/06 12:36:23 riastradh Exp $ */
2
3/*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_nv04_fence.c,v 1.1.1.1 2014/08/06 12:36:23 riastradh Exp $");
29
30#include <engine/fifo.h>
31
32#include "nouveau_drm.h"
33#include "nouveau_dma.h"
34#include "nouveau_fence.h"
35
36struct nv04_fence_chan {
37 struct nouveau_fence_chan base;
38};
39
40struct nv04_fence_priv {
41 struct nouveau_fence_priv base;
42};
43
44static int
45nv04_fence_emit(struct nouveau_fence *fence)
46{
47 struct nouveau_channel *chan = fence->channel;
48 int ret = RING_SPACE(chan, 2);
49 if (ret == 0) {
50 BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
51 OUT_RING (chan, fence->sequence);
52 FIRE_RING (chan);
53 }
54 return ret;
55}
56
57static int
58nv04_fence_sync(struct nouveau_fence *fence,
59 struct nouveau_channel *prev, struct nouveau_channel *chan)
60{
61 return -ENODEV;
62}
63
64static u32
65nv04_fence_read(struct nouveau_channel *chan)
66{
67 struct nouveau_fifo_chan *fifo = (void *)chan->object;
68 return atomic_read(&fifo->refcnt);
69}
70
71static void
72nv04_fence_context_del(struct nouveau_channel *chan)
73{
74 struct nv04_fence_chan *fctx = chan->fence;
75 nouveau_fence_context_del(&fctx->base);
76 chan->fence = NULL;
77 kfree(fctx);
78}
79
80static int
81nv04_fence_context_new(struct nouveau_channel *chan)
82{
83 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
84 if (fctx) {
85 nouveau_fence_context_new(&fctx->base);
86 fctx->base.emit = nv04_fence_emit;
87 fctx->base.sync = nv04_fence_sync;
88 fctx->base.read = nv04_fence_read;
89 chan->fence = fctx;
90 return 0;
91 }
92 return -ENOMEM;
93}
94
95static void
96nv04_fence_destroy(struct nouveau_drm *drm)
97{
98 struct nv04_fence_priv *priv = drm->fence;
99 drm->fence = NULL;
100 kfree(priv);
101}
102
103int
104nv04_fence_create(struct nouveau_drm *drm)
105{
106 struct nv04_fence_priv *priv;
107
108 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
109 if (!priv)
110 return -ENOMEM;
111
112 priv->base.dtor = nv04_fence_destroy;
113 priv->base.context_new = nv04_fence_context_new;
114 priv->base.context_del = nv04_fence_context_del;
115 return 0;
116}
117