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
nv10_fence_emit(struct nouveau_fence * fence)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
nv10_fence_sync(struct nouveau_fence * fence,struct nouveau_channel * prev,struct nouveau_channel * chan)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
nv10_fence_read(struct nouveau_channel * chan)51 nv10_fence_read(struct nouveau_channel *chan)
52 {
53 return nvif_rd32(&chan->user, 0x0048);
54 }
55
56 void
nv10_fence_context_del(struct nouveau_channel * chan)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
nv10_fence_context_new(struct nouveau_channel * chan)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
nv10_fence_destroy(struct nouveau_drm * drm)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
nv10_fence_create(struct nouveau_drm * drm)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
