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 "drmP.h"
26 #include "nouveau_drv.h"
27 #include "nouveau_dma.h"
28 #include "nouveau_ramht.h"
29 #include "nouveau_fence.h"
30 
31 struct nv04_fence_chan {
32 	struct nouveau_fence_chan base;
33 	atomic_t sequence;
34 };
35 
36 struct nv04_fence_priv {
37 	struct nouveau_fence_priv base;
38 };
39 
40 static int
41 nv04_fence_emit(struct nouveau_fence *fence)
42 {
43 	struct nouveau_channel *chan = fence->channel;
44 	int ret = RING_SPACE(chan, 2);
45 	if (ret == 0) {
46 		BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
47 		OUT_RING  (chan, fence->sequence);
48 		FIRE_RING (chan);
49 	}
50 	return ret;
51 }
52 
53 static int
54 nv04_fence_sync(struct nouveau_fence *fence,
55 		struct nouveau_channel *prev, struct nouveau_channel *chan)
56 {
57 	return -ENODEV;
58 }
59 
60 int
61 nv04_fence_mthd(struct nouveau_channel *chan, u32 class, u32 mthd, u32 data)
62 {
63 	struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
64 	atomic_set(&fctx->sequence, data);
65 	return 0;
66 }
67 
68 static u32
69 nv04_fence_read(struct nouveau_channel *chan)
70 {
71 	struct nv04_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
72 	return atomic_read(&fctx->sequence);
73 }
74 
75 static void
76 nv04_fence_context_del(struct nouveau_channel *chan, int engine)
77 {
78 	struct nv04_fence_chan *fctx = chan->engctx[engine];
79 	nouveau_fence_context_del(&fctx->base);
80 	chan->engctx[engine] = NULL;
81 	kfree(fctx);
82 }
83 
84 static int
85 nv04_fence_context_new(struct nouveau_channel *chan, int engine)
86 {
87 	struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
88 	if (fctx) {
89 		nouveau_fence_context_new(&fctx->base);
90 		atomic_set(&fctx->sequence, 0);
91 		chan->engctx[engine] = fctx;
92 		return 0;
93 	}
94 	return -ENOMEM;
95 }
96 
97 static int
98 nv04_fence_fini(struct drm_device *dev, int engine, bool suspend)
99 {
100 	return 0;
101 }
102 
103 static int
104 nv04_fence_init(struct drm_device *dev, int engine)
105 {
106 	return 0;
107 }
108 
109 static void
110 nv04_fence_destroy(struct drm_device *dev, int engine)
111 {
112 	struct drm_nouveau_private *dev_priv = dev->dev_private;
113 	struct nv04_fence_priv *priv = nv_engine(dev, engine);
114 
115 	dev_priv->eng[engine] = NULL;
116 	kfree(priv);
117 }
118 
119 int
120 nv04_fence_create(struct drm_device *dev)
121 {
122 	struct drm_nouveau_private *dev_priv = dev->dev_private;
123 	struct nv04_fence_priv *priv;
124 	int ret;
125 
126 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
127 	if (!priv)
128 		return -ENOMEM;
129 
130 	priv->base.engine.destroy = nv04_fence_destroy;
131 	priv->base.engine.init = nv04_fence_init;
132 	priv->base.engine.fini = nv04_fence_fini;
133 	priv->base.engine.context_new = nv04_fence_context_new;
134 	priv->base.engine.context_del = nv04_fence_context_del;
135 	priv->base.emit = nv04_fence_emit;
136 	priv->base.sync = nv04_fence_sync;
137 	priv->base.read = nv04_fence_read;
138 	dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine;
139 	return ret;
140 }
141