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 "nouveau_drv.h"
26 #include "nouveau_dma.h"
27 #include "nv10_fence.h"
28 
29 int
30 nv10_fence_emit(struct nouveau_fence *fence)
31 {
32 	struct nouveau_channel *chan = fence->channel;
33 	int ret = RING_SPACE(chan, 2);
34 	if (ret == 0) {
35 		BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
36 		OUT_RING  (chan, fence->base.seqno);
37 		FIRE_RING (chan);
38 	}
39 	return ret;
40 }
41 
42 
43 static int
44 nv10_fence_sync(struct nouveau_fence *fence,
45 		struct nouveau_channel *prev, struct nouveau_channel *chan)
46 {
47 	return -ENODEV;
48 }
49 
50 u32
51 nv10_fence_read(struct nouveau_channel *chan)
52 {
53 	return nvif_rd32(&chan->user, 0x0048);
54 }
55 
56 void
57 nv10_fence_context_del(struct nouveau_channel *chan)
58 {
59 	struct nv10_fence_chan *fctx = chan->fence;
60 	nouveau_fence_context_del(&fctx->base);
61 	nvif_object_fini(&fctx->sema);
62 	chan->fence = NULL;
63 	nouveau_fence_context_free(&fctx->base);
64 }
65 
66 static int
67 nv10_fence_context_new(struct nouveau_channel *chan)
68 {
69 	struct nv10_fence_chan *fctx;
70 
71 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
72 	if (!fctx)
73 		return -ENOMEM;
74 
75 	nouveau_fence_context_new(chan, &fctx->base);
76 	fctx->base.emit = nv10_fence_emit;
77 	fctx->base.read = nv10_fence_read;
78 	fctx->base.sync = nv10_fence_sync;
79 	return 0;
80 }
81 
82 void
83 nv10_fence_destroy(struct nouveau_drm *drm)
84 {
85 	struct nv10_fence_priv *priv = drm->fence;
86 	nouveau_bo_unmap(priv->bo);
87 	if (priv->bo)
88 		nouveau_bo_unpin(priv->bo);
89 	nouveau_bo_ref(NULL, &priv->bo);
90 	drm->fence = NULL;
91 	kfree(priv);
92 }
93 
94 int
95 nv10_fence_create(struct nouveau_drm *drm)
96 {
97 	struct nv10_fence_priv *priv;
98 
99 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
100 	if (!priv)
101 		return -ENOMEM;
102 
103 	priv->base.dtor = nv10_fence_destroy;
104 	priv->base.context_new = nv10_fence_context_new;
105 	priv->base.context_del = nv10_fence_context_del;
106 	spin_lock_init(&priv->lock);
107 	return 0;
108 }
109