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
nv04_fence_emit(struct nouveau_fence * fence)40 nv04_fence_emit(struct nouveau_fence *fence)
41 {
42 struct nvif_push *push = unrcu_pointer(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
nv04_fence_sync(struct nouveau_fence * fence,struct nouveau_channel * prev,struct nouveau_channel * chan)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
nv04_fence_read(struct nouveau_channel * chan)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
nv04_fence_context_del(struct nouveau_channel * chan)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
nv04_fence_context_new(struct nouveau_channel * chan)77 nv04_fence_context_new(struct nouveau_channel *chan)
78 {
79 struct nv04_fence_chan *fctx = kzalloc(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
nv04_fence_destroy(struct nouveau_drm * drm)92 nv04_fence_destroy(struct nouveau_drm *drm)
93 {
94 struct nv04_fence_priv *priv = drm->fence;
95 drm->fence = NULL;
96 kfree(priv);
97 }
98
99 int
nv04_fence_create(struct nouveau_drm * drm)100 nv04_fence_create(struct nouveau_drm *drm)
101 {
102 struct nv04_fence_priv *priv;
103
104 priv = drm->fence = kzalloc(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