1/* $NetBSD: nouveau_nv17_fence.c,v 1.1.1.1 2014/08/06 12:36:23 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_nv17_fence.c,v 1.1.1.1 2014/08/06 12:36:23 riastradh Exp $");
29
30#include <core/object.h>
31#include <core/class.h>
32
33#include "nouveau_drm.h"
34#include "nouveau_dma.h"
35#include "nv10_fence.h"
36
37int
38nv17_fence_sync(struct nouveau_fence *fence,
39 struct nouveau_channel *prev, struct nouveau_channel *chan)
40{
41 struct nv10_fence_priv *priv = chan->drm->fence;
42 u32 value;
43 int ret;
44
45 if (!mutex_trylock(&prev->cli->mutex))
46 return -EBUSY;
47
48 spin_lock(&priv->lock);
49 value = priv->sequence;
50 priv->sequence += 2;
51 spin_unlock(&priv->lock);
52
53 ret = RING_SPACE(prev, 5);
54 if (!ret) {
55 BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
56 OUT_RING (prev, NvSema);
57 OUT_RING (prev, 0);
58 OUT_RING (prev, value + 0);
59 OUT_RING (prev, value + 1);
60 FIRE_RING (prev);
61 }
62
63 if (!ret && !(ret = RING_SPACE(chan, 5))) {
64 BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
65 OUT_RING (chan, NvSema);
66 OUT_RING (chan, 0);
67 OUT_RING (chan, value + 1);
68 OUT_RING (chan, value + 2);
69 FIRE_RING (chan);
70 }
71
72 mutex_unlock(&prev->cli->mutex);
73 return 0;
74}
75
76static int
77nv17_fence_context_new(struct nouveau_channel *chan)
78{
79 struct nv10_fence_priv *priv = chan->drm->fence;
80 struct nv10_fence_chan *fctx;
81 struct ttm_mem_reg *mem = &priv->bo->bo.mem;
82 struct nouveau_object *object;
83 u32 start = mem->start * PAGE_SIZE;
84 u32 limit = start + mem->size - 1;
85 int ret = 0;
86
87 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
88 if (!fctx)
89 return -ENOMEM;
90
91 nouveau_fence_context_new(&fctx->base);
92 fctx->base.emit = nv10_fence_emit;
93 fctx->base.read = nv10_fence_read;
94 fctx->base.sync = nv17_fence_sync;
95
96 ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
97 NvSema, 0x0002,
98 &(struct nv_dma_class) {
99 .flags = NV_DMA_TARGET_VRAM |
100 NV_DMA_ACCESS_RDWR,
101 .start = start,
102 .limit = limit,
103 }, sizeof(struct nv_dma_class),
104 &object);
105 if (ret)
106 nv10_fence_context_del(chan);
107 return ret;
108}
109
110void
111nv17_fence_resume(struct nouveau_drm *drm)
112{
113 struct nv10_fence_priv *priv = drm->fence;
114
115 nouveau_bo_wr32(priv->bo, 0, priv->sequence);
116}
117
118int
119nv17_fence_create(struct nouveau_drm *drm)
120{
121 struct nv10_fence_priv *priv;
122 int ret = 0;
123
124 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
125 if (!priv)
126 return -ENOMEM;
127
128 priv->base.dtor = nv10_fence_destroy;
129 priv->base.resume = nv17_fence_resume;
130 priv->base.context_new = nv17_fence_context_new;
131 priv->base.context_del = nv10_fence_context_del;
132 spin_lock_init(&priv->lock);
133
134 ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM,
135 0, 0x0000, NULL, &priv->bo);
136 if (!ret) {
137 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
138 if (!ret) {
139 ret = nouveau_bo_map(priv->bo);
140 if (ret)
141 nouveau_bo_unpin(priv->bo);
142 }
143 if (ret)
144 nouveau_bo_ref(NULL, &priv->bo);
145 }
146
147 if (ret) {
148 nv10_fence_destroy(drm);
149 return ret;
150 }
151
152 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
153 return ret;
154}
155