1 /* $NetBSD: nouveau_nv04_fence.c,v 1.4 2021/12/18 23:45:32 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv04_fence.c,v 1.4 2021/12/18 23:45:32 riastradh Exp $");
29
30 #include "nouveau_drv.h"
31 #include "nouveau_dma.h"
32 #include "nouveau_fence.h"
33
34 #include <nvif/if0004.h>
35
36 struct nv04_fence_chan {
37 struct nouveau_fence_chan base;
38 };
39
40 struct nv04_fence_priv {
41 struct nouveau_fence_priv base;
42 };
43
44 static int
nv04_fence_emit(struct nouveau_fence * fence)45 nv04_fence_emit(struct nouveau_fence *fence)
46 {
47 struct nouveau_channel *chan = fence->channel;
48 int ret = RING_SPACE(chan, 2);
49 if (ret == 0) {
50 BEGIN_NV04(chan, NvSubSw, 0x0150, 1);
51 OUT_RING (chan, fence->base.seqno);
52 FIRE_RING (chan);
53 }
54 return ret;
55 }
56
57 static int
nv04_fence_sync(struct nouveau_fence * fence,struct nouveau_channel * prev,struct nouveau_channel * chan)58 nv04_fence_sync(struct nouveau_fence *fence,
59 struct nouveau_channel *prev, struct nouveau_channel *chan)
60 {
61 return -ENODEV;
62 }
63
64 static u32
nv04_fence_read(struct nouveau_channel * chan)65 nv04_fence_read(struct nouveau_channel *chan)
66 {
67 struct nv04_nvsw_get_ref_v0 args = {};
68 WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,
69 &args, sizeof(args)));
70 return args.ref;
71 }
72
73 static void
nv04_fence_context_del(struct nouveau_channel * chan)74 nv04_fence_context_del(struct nouveau_channel *chan)
75 {
76 struct nv04_fence_chan *fctx = chan->fence;
77 nouveau_fence_context_del(&fctx->base);
78 chan->fence = NULL;
79 nouveau_fence_context_free(&fctx->base);
80 }
81
82 static int
nv04_fence_context_new(struct nouveau_channel * chan)83 nv04_fence_context_new(struct nouveau_channel *chan)
84 {
85 struct nv04_fence_chan *fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
86 if (fctx) {
87 nouveau_fence_context_new(chan, &fctx->base);
88 fctx->base.emit = nv04_fence_emit;
89 fctx->base.sync = nv04_fence_sync;
90 fctx->base.read = nv04_fence_read;
91 chan->fence = fctx;
92 return 0;
93 }
94 return -ENOMEM;
95 }
96
97 static void
nv04_fence_destroy(struct nouveau_drm * drm)98 nv04_fence_destroy(struct nouveau_drm *drm)
99 {
100 struct nv04_fence_priv *priv = drm->fence;
101 drm->fence = NULL;
102 kfree(priv);
103 }
104
105 int
nv04_fence_create(struct nouveau_drm * drm)106 nv04_fence_create(struct nouveau_drm *drm)
107 {
108 struct nv04_fence_priv *priv;
109
110 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
111 if (!priv)
112 return -ENOMEM;
113
114 priv->base.dtor = nv04_fence_destroy;
115 priv->base.context_new = nv04_fence_context_new;
116 priv->base.context_del = nv04_fence_context_del;
117 return 0;
118 }
119