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_drm.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, 0x0048);
54 }
55 
56 void
57 nv10_fence_context_del(struct nouveau_channel *chan)
58 {
59 	struct nv10_fence_chan *fctx = chan->fence;
60 	int i;
61 	nouveau_fence_context_del(&fctx->base);
62 	for (i = 0; i < ARRAY_SIZE(fctx->head); i++)
63 		nvif_object_fini(&fctx->head[i]);
64 	nvif_object_fini(&fctx->sema);
65 	chan->fence = NULL;
66 	nouveau_fence_context_free(&fctx->base);
67 }
68 
69 int
70 nv10_fence_context_new(struct nouveau_channel *chan)
71 {
72 	struct nv10_fence_chan *fctx;
73 
74 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
75 	if (!fctx)
76 		return -ENOMEM;
77 
78 	nouveau_fence_context_new(chan, &fctx->base);
79 	fctx->base.emit = nv10_fence_emit;
80 	fctx->base.read = nv10_fence_read;
81 	fctx->base.sync = nv10_fence_sync;
82 	return 0;
83 }
84 
85 void
86 nv10_fence_destroy(struct nouveau_drm *drm)
87 {
88 	struct nv10_fence_priv *priv = drm->fence;
89 	nouveau_bo_unmap(priv->bo);
90 	if (priv->bo)
91 		nouveau_bo_unpin(priv->bo);
92 	nouveau_bo_ref(NULL, &priv->bo);
93 	drm->fence = NULL;
94 	kfree(priv);
95 }
96 
97 int
98 nv10_fence_create(struct nouveau_drm *drm)
99 {
100 	struct nv10_fence_priv *priv;
101 
102 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
103 	if (!priv)
104 		return -ENOMEM;
105 
106 	priv->base.dtor = nv10_fence_destroy;
107 	priv->base.context_new = nv10_fence_context_new;
108 	priv->base.context_del = nv10_fence_context_del;
109 	priv->base.contexts = 31;
110 	priv->base.context_base = fence_context_alloc(priv->base.contexts);
111 	spin_lock_init(&priv->lock);
112 	return 0;
113 }
114