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 |
23 | */ |
24 | #include "nouveau_drv.h" |
25 | #include "nouveau_dma.h" |
26 | #include "nouveau_fence.h" |
27 | |
28 | #include <nvif/if0004.h> |
29 | #include <nvif/push006c.h> |
30 | |
31 | struct nv04_fence_chan { |
32 | struct nouveau_fence_chan base; |
33 | }; |
34 | |
35 | struct nv04_fence_priv { |
36 | struct nouveau_fence_priv base; |
37 | }; |
38 | |
39 | static int |
40 | nv04_fence_emit(struct nouveau_fence *fence) |
41 | { |
42 | struct nvif_push *push = fence->channel->chan.push; |
43 | int ret = PUSH_WAIT(push, 2); |
44 | if (ret == 0) { |
45 | PUSH_NVSQ(push, NV_SW, 0x0150, fence->base.seqno); |
46 | PUSH_KICK(push); |
47 | } |
48 | return ret; |
49 | } |
50 | |
51 | static int |
52 | nv04_fence_sync(struct nouveau_fence *fence, |
53 | struct nouveau_channel *prev, struct nouveau_channel *chan) |
54 | { |
55 | return -ENODEV; |
56 | } |
57 | |
58 | static u32 |
59 | nv04_fence_read(struct nouveau_channel *chan) |
60 | { |
61 | struct nv04_nvsw_get_ref_v0 args = {}; |
62 | WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF, |
63 | &args, sizeof(args))); |
64 | return args.ref; |
65 | } |
66 | |
67 | static void |
68 | nv04_fence_context_del(struct nouveau_channel *chan) |
69 | { |
70 | struct nv04_fence_chan *fctx = chan->fence; |
71 | nouveau_fence_context_del(&fctx->base); |
72 | chan->fence = NULL; |
73 | nouveau_fence_context_free(&fctx->base); |
74 | } |
75 | |
76 | static int |
77 | nv04_fence_context_new(struct nouveau_channel *chan) |
78 | { |
79 | struct nv04_fence_chan *fctx = kzalloc(size: sizeof(*fctx), GFP_KERNEL); |
80 | if (fctx) { |
81 | nouveau_fence_context_new(chan, &fctx->base); |
82 | fctx->base.emit = nv04_fence_emit; |
83 | fctx->base.sync = nv04_fence_sync; |
84 | fctx->base.read = nv04_fence_read; |
85 | chan->fence = fctx; |
86 | return 0; |
87 | } |
88 | return -ENOMEM; |
89 | } |
90 | |
91 | static void |
92 | nv04_fence_destroy(struct nouveau_drm *drm) |
93 | { |
94 | struct nv04_fence_priv *priv = drm->fence; |
95 | drm->fence = NULL; |
96 | kfree(objp: priv); |
97 | } |
98 | |
99 | int |
100 | nv04_fence_create(struct nouveau_drm *drm) |
101 | { |
102 | struct nv04_fence_priv *priv; |
103 | |
104 | priv = drm->fence = kzalloc(size: sizeof(*priv), GFP_KERNEL); |
105 | if (!priv) |
106 | return -ENOMEM; |
107 | |
108 | priv->base.dtor = nv04_fence_destroy; |
109 | priv->base.context_new = nv04_fence_context_new; |
110 | priv->base.context_del = nv04_fence_context_del; |
111 | return 0; |
112 | } |
113 | |