1 /* $NetBSD: nouveau_nv10_fence.c,v 1.6 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 <bskeggs@redhat.com>
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv10_fence.c,v 1.6 2021/12/18 23:45:32 riastradh Exp $");
29
30 #include "nouveau_drv.h"
31 #include "nouveau_dma.h"
32 #include "nv10_fence.h"
33
34 int
nv10_fence_emit(struct nouveau_fence * fence)35 nv10_fence_emit(struct nouveau_fence *fence)
36 {
37 struct nouveau_channel *chan = fence->channel;
38 int ret = RING_SPACE(chan, 2);
39 if (ret == 0) {
40 BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
41 OUT_RING (chan, fence->base.seqno);
42 FIRE_RING (chan);
43 }
44 return ret;
45 }
46
47
48 static int
nv10_fence_sync(struct nouveau_fence * fence,struct nouveau_channel * prev,struct nouveau_channel * chan)49 nv10_fence_sync(struct nouveau_fence *fence,
50 struct nouveau_channel *prev, struct nouveau_channel *chan)
51 {
52 return -ENODEV;
53 }
54
55 u32
nv10_fence_read(struct nouveau_channel * chan)56 nv10_fence_read(struct nouveau_channel *chan)
57 {
58 return nvif_rd32(&chan->user, 0x0048);
59 }
60
61 void
nv10_fence_context_del(struct nouveau_channel * chan)62 nv10_fence_context_del(struct nouveau_channel *chan)
63 {
64 struct nv10_fence_chan *fctx = chan->fence;
65 nouveau_fence_context_del(&fctx->base);
66 nvif_object_fini(&fctx->sema);
67 chan->fence = NULL;
68 nouveau_fence_context_free(&fctx->base);
69 }
70
71 static int
nv10_fence_context_new(struct nouveau_channel * chan)72 nv10_fence_context_new(struct nouveau_channel *chan)
73 {
74 struct nv10_fence_chan *fctx;
75
76 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
77 if (!fctx)
78 return -ENOMEM;
79
80 nouveau_fence_context_new(chan, &fctx->base);
81 fctx->base.emit = nv10_fence_emit;
82 fctx->base.read = nv10_fence_read;
83 fctx->base.sync = nv10_fence_sync;
84 return 0;
85 }
86
87 void
nv10_fence_destroy(struct nouveau_drm * drm)88 nv10_fence_destroy(struct nouveau_drm *drm)
89 {
90 struct nv10_fence_priv *priv = drm->fence;
91 nouveau_bo_unmap(priv->bo);
92 if (priv->bo)
93 nouveau_bo_unpin(priv->bo);
94 nouveau_bo_ref(NULL, &priv->bo);
95 drm->fence = NULL;
96 spin_lock_destroy(&priv->lock);
97 kfree(priv);
98 }
99
100 int
nv10_fence_create(struct nouveau_drm * drm)101 nv10_fence_create(struct nouveau_drm *drm)
102 {
103 struct nv10_fence_priv *priv;
104
105 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
106 if (!priv)
107 return -ENOMEM;
108
109 priv->base.dtor = nv10_fence_destroy;
110 priv->base.context_new = nv10_fence_context_new;
111 priv->base.context_del = nv10_fence_context_del;
112 spin_lock_init(&priv->lock);
113 return 0;
114 }
115