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 <core/object.h>
26 #include <core/class.h>
27 
28 #include "nouveau_drm.h"
29 #include "nouveau_dma.h"
30 #include "nv10_fence.h"
31 
32 int
33 nv10_fence_emit(struct nouveau_fence *fence)
34 {
35 	struct nouveau_channel *chan = fence->channel;
36 	int ret = RING_SPACE(chan, 2);
37 	if (ret == 0) {
38 		BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
39 		OUT_RING  (chan, fence->sequence);
40 		FIRE_RING (chan);
41 	}
42 	return ret;
43 }
44 
45 
46 static int
47 nv10_fence_sync(struct nouveau_fence *fence,
48 		struct nouveau_channel *prev, struct nouveau_channel *chan)
49 {
50 	return -ENODEV;
51 }
52 
53 u32
54 nv10_fence_read(struct nouveau_channel *chan)
55 {
56 	return nv_ro32(chan->object, 0x0048);
57 }
58 
59 void
60 nv10_fence_context_del(struct nouveau_channel *chan)
61 {
62 	struct nv10_fence_chan *fctx = chan->fence;
63 	nouveau_fence_context_del(&fctx->base);
64 	chan->fence = NULL;
65 	kfree(fctx);
66 }
67 
68 int
69 nv10_fence_context_new(struct nouveau_channel *chan)
70 {
71 	struct nv10_fence_chan *fctx;
72 
73 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
74 	if (!fctx)
75 		return -ENOMEM;
76 
77 	nouveau_fence_context_new(&fctx->base);
78 	fctx->base.emit = nv10_fence_emit;
79 	fctx->base.read = nv10_fence_read;
80 	fctx->base.sync = nv10_fence_sync;
81 	return 0;
82 }
83 
84 void
85 nv10_fence_destroy(struct nouveau_drm *drm)
86 {
87 	struct nv10_fence_priv *priv = drm->fence;
88 	nouveau_bo_unmap(priv->bo);
89 	if (priv->bo)
90 		nouveau_bo_unpin(priv->bo);
91 	nouveau_bo_ref(NULL, &priv->bo);
92 	drm->fence = NULL;
93 	kfree(priv);
94 }
95 
96 int
97 nv10_fence_create(struct nouveau_drm *drm)
98 {
99 	struct nv10_fence_priv *priv;
100 
101 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
102 	if (!priv)
103 		return -ENOMEM;
104 
105 	priv->base.dtor = nv10_fence_destroy;
106 	priv->base.context_new = nv10_fence_context_new;
107 	priv->base.context_del = nv10_fence_context_del;
108 	spin_lock_init(&priv->lock);
109 	return 0;
110 }
111