nvc0_fence.c revision 5e120f6e4b3f35b741c5445dfc755f50128c3c44 
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
25#include "drmP.h"
26#include "nouveau_drv.h"
27#include "nouveau_dma.h"
28#include "nouveau_ramht.h"
29#include "nouveau_fence.h"
30
31struct nvc0_fence_priv {
32	struct nouveau_fence_priv base;
33	struct nouveau_bo *bo;
34};
35
36struct nvc0_fence_chan {
37	struct nouveau_fence_chan base;
38	struct nouveau_vma vma;
39};
40
41static int
42nvc0_fence_emit(struct nouveau_fence *fence)
43{
44	struct nouveau_channel *chan = fence->channel;
45	struct nvc0_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
46	u64 addr = fctx->vma.offset + chan->id * 16;
47	int ret;
48
49	ret = RING_SPACE(chan, 5);
50	if (ret == 0) {
51		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
52		OUT_RING  (chan, upper_32_bits(addr));
53		OUT_RING  (chan, lower_32_bits(addr));
54		OUT_RING  (chan, fence->sequence);
55		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
56		FIRE_RING (chan);
57	}
58
59	return ret;
60}
61
62static int
63nvc0_fence_sync(struct nouveau_fence *fence, struct nouveau_channel *chan)
64{
65	struct nvc0_fence_chan *fctx = chan->engctx[NVOBJ_ENGINE_FENCE];
66	u64 addr = fctx->vma.offset + fence->channel->id * 16;
67	int ret;
68
69	ret = RING_SPACE(chan, 5);
70	if (ret == 0) {
71		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
72		OUT_RING  (chan, upper_32_bits(addr));
73		OUT_RING  (chan, lower_32_bits(addr));
74		OUT_RING  (chan, fence->sequence);
75		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL |
76				 NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
77		FIRE_RING (chan);
78	}
79
80	return ret;
81}
82
83static u32
84nvc0_fence_read(struct nouveau_channel *chan)
85{
86	struct nvc0_fence_priv *priv = nv_engine(chan->dev, NVOBJ_ENGINE_FENCE);
87	return nouveau_bo_rd32(priv->bo, chan->id * 16/4);
88}
89
90static void
91nvc0_fence_context_del(struct nouveau_channel *chan, int engine)
92{
93	struct nvc0_fence_priv *priv = nv_engine(chan->dev, engine);
94	struct nvc0_fence_chan *fctx = chan->engctx[engine];
95
96	nouveau_bo_vma_del(priv->bo, &fctx->vma);
97	nouveau_fence_context_del(&fctx->base);
98	chan->engctx[engine] = NULL;
99	kfree(fctx);
100}
101
102static int
103nvc0_fence_context_new(struct nouveau_channel *chan, int engine)
104{
105	struct nvc0_fence_priv *priv = nv_engine(chan->dev, engine);
106	struct nvc0_fence_chan *fctx;
107	int ret;
108
109	fctx = chan->engctx[engine] = kzalloc(sizeof(*fctx), GFP_KERNEL);
110	if (!fctx)
111		return -ENOMEM;
112
113	nouveau_fence_context_new(&fctx->base);
114
115	ret = nouveau_bo_vma_add(priv->bo, chan->vm, &fctx->vma);
116	if (ret)
117		nvc0_fence_context_del(chan, engine);
118
119	nouveau_bo_wr32(priv->bo, chan->id * 16/4, 0x00000000);
120	return ret;
121}
122
123static int
124nvc0_fence_fini(struct drm_device *dev, int engine, bool suspend)
125{
126	return 0;
127}
128
129static int
130nvc0_fence_init(struct drm_device *dev, int engine)
131{
132	return 0;
133}
134
135static void
136nvc0_fence_destroy(struct drm_device *dev, int engine)
137{
138	struct drm_nouveau_private *dev_priv = dev->dev_private;
139	struct nvc0_fence_priv *priv = nv_engine(dev, engine);
140
141	nouveau_bo_unmap(priv->bo);
142	nouveau_bo_ref(NULL, &priv->bo);
143	dev_priv->eng[engine] = NULL;
144	kfree(priv);
145}
146
147int
148nvc0_fence_create(struct drm_device *dev)
149{
150	struct drm_nouveau_private *dev_priv = dev->dev_private;
151	struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
152	struct nvc0_fence_priv *priv;
153	int ret;
154
155	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
156	if (!priv)
157		return -ENOMEM;
158
159	priv->base.engine.destroy = nvc0_fence_destroy;
160	priv->base.engine.init = nvc0_fence_init;
161	priv->base.engine.fini = nvc0_fence_fini;
162	priv->base.engine.context_new = nvc0_fence_context_new;
163	priv->base.engine.context_del = nvc0_fence_context_del;
164	priv->base.emit = nvc0_fence_emit;
165	priv->base.sync = nvc0_fence_sync;
166	priv->base.read = nvc0_fence_read;
167	dev_priv->eng[NVOBJ_ENGINE_FENCE] = &priv->base.engine;
168
169	ret = nouveau_bo_new(dev, 16 * pfifo->channels, 0, TTM_PL_FLAG_VRAM,
170			     0, 0, NULL, &priv->bo);
171	if (ret == 0) {
172		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
173		if (ret == 0)
174			ret = nouveau_bo_map(priv->bo);
175		if (ret)
176			nouveau_bo_ref(NULL, &priv->bo);
177	}
178
179	if (ret)
180		nvc0_fence_destroy(dev, NVOBJ_ENGINE_FENCE);
181	return ret;
182}
183