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 #include "nouveau_drv.h"
25 #include "nouveau_dma.h"
26 #include "nv10_fence.h"
27 
28 #include <nvif/push006c.h>
29 
30 #include <nvhw/class/cl006e.h>
31 
32 int
33 nv10_fence_emit(struct nouveau_fence *fence)
34 {
35 	struct nvif_push *push = fence->channel->chan.push;
36 	int ret = PUSH_WAIT(push, 2);
37 	if (ret == 0) {
38 		PUSH_MTHD(push, NV06E, SET_REFERENCE, fence->base.seqno);
39 		PUSH_KICK(push);
40 	}
41 	return ret;
42 }
43 
44 
45 static int
46 nv10_fence_sync(struct nouveau_fence *fence,
47 		struct nouveau_channel *prev, struct nouveau_channel *chan)
48 {
49 	return -ENODEV;
50 }
51 
52 u32
53 nv10_fence_read(struct nouveau_channel *chan)
54 {
55 	return NVIF_RD32(&chan->user, NV06E, REFERENCE);
56 }
57 
58 void
59 nv10_fence_context_del(struct nouveau_channel *chan)
60 {
61 	struct nv10_fence_chan *fctx = chan->fence;
62 	nouveau_fence_context_del(&fctx->base);
63 	nvif_object_dtor(&fctx->sema);
64 	chan->fence = NULL;
65 	nouveau_fence_context_free(&fctx->base);
66 }
67 
68 static 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(chan, &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