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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 | ||
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25 | #include <engine/fifo.h> |
26 | ||
27 | #include "nouveau_drm.h" | |
5e120f6e | 28 | #include "nouveau_dma.h" |
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29 | #include "nouveau_fence.h" |
30 | ||
31 | struct nv04_fence_chan { | |
32 | struct nouveau_fence_chan base; | |
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33 | }; |
34 | ||
35 | struct nv04_fence_priv { | |
36 | struct nouveau_fence_priv base; | |
37 | }; | |
38 | ||
39 | static int | |
40 | nv04_fence_emit(struct nouveau_fence *fence) | |
41 | { | |
42 | struct nouveau_channel *chan = fence->channel; | |
43 | int ret = RING_SPACE(chan, 2); | |
44 | if (ret == 0) { | |
45 | BEGIN_NV04(chan, NvSubSw, 0x0150, 1); | |
46 | OUT_RING (chan, fence->sequence); | |
47 | FIRE_RING (chan); | |
48 | } | |
49 | return ret; | |
50 | } | |
51 | ||
52 | static int | |
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53 | nv04_fence_sync(struct nouveau_fence *fence, |
54 | struct nouveau_channel *prev, struct nouveau_channel *chan) | |
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55 | { |
56 | return -ENODEV; | |
57 | } | |
58 | ||
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59 | static u32 |
60 | nv04_fence_read(struct nouveau_channel *chan) | |
61 | { | |
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62 | struct nouveau_fifo_chan *fifo = (void *)chan->object; |
63 | return atomic_read(&fifo->refcnt); | |
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64 | } |
65 | ||
66 | static void | |
e193b1d4 | 67 | nv04_fence_context_del(struct nouveau_channel *chan) |
5e120f6e | 68 | { |
e193b1d4 | 69 | struct nv04_fence_chan *fctx = chan->fence; |
5e120f6e | 70 | nouveau_fence_context_del(&fctx->base); |
e193b1d4 | 71 | chan->fence = NULL; |
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72 | kfree(fctx); |
73 | } | |
74 | ||
75 | static int | |
e193b1d4 | 76 | nv04_fence_context_new(struct nouveau_channel *chan) |
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77 | { |
78 | struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL); | |
79 | if (fctx) { | |
80 | nouveau_fence_context_new(&fctx->base); | |
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81 | fctx->base.emit = nv04_fence_emit; |
82 | fctx->base.sync = nv04_fence_sync; | |
83 | fctx->base.read = nv04_fence_read; | |
e193b1d4 | 84 | chan->fence = fctx; |
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85 | return 0; |
86 | } | |
87 | return -ENOMEM; | |
88 | } | |
89 | ||
5e120f6e | 90 | static void |
ebb945a9 | 91 | nv04_fence_destroy(struct nouveau_drm *drm) |
5e120f6e | 92 | { |
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93 | struct nv04_fence_priv *priv = drm->fence; |
94 | drm->fence = NULL; | |
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95 | kfree(priv); |
96 | } | |
97 | ||
98 | int | |
ebb945a9 | 99 | nv04_fence_create(struct nouveau_drm *drm) |
5e120f6e | 100 | { |
5e120f6e | 101 | struct nv04_fence_priv *priv; |
5e120f6e | 102 | |
ebb945a9 | 103 | priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL); |
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104 | if (!priv) |
105 | return -ENOMEM; | |
106 | ||
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107 | priv->base.dtor = nv04_fence_destroy; |
108 | priv->base.context_new = nv04_fence_context_new; | |
109 | priv->base.context_del = nv04_fence_context_del; | |
ebb945a9 | 110 | return 0; |
5e120f6e | 111 | } |