nvc0_fence.c revision e193b1d42c390bf1bff7fa02a5a1202b98e75601 
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 <engine/fifo.h>
29#include <core/ramht.h>
30#include "nouveau_fence.h"
31
32struct nvc0_fence_priv {
33	struct nouveau_fence_priv base;
34	struct nouveau_bo *bo;
35	u32 *suspend;
36};
37
38struct nvc0_fence_chan {
39	struct nouveau_fence_chan base;
40	struct nouveau_vma vma;
41};
42
43static int
44nvc0_fence_emit(struct nouveau_fence *fence)
45{
46	struct nouveau_channel *chan = fence->channel;
47	struct nvc0_fence_chan *fctx = chan->fence;
48	u64 addr = fctx->vma.offset + chan->id * 16;
49	int ret;
50
51	ret = RING_SPACE(chan, 5);
52	if (ret == 0) {
53		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
54		OUT_RING  (chan, upper_32_bits(addr));
55		OUT_RING  (chan, lower_32_bits(addr));
56		OUT_RING  (chan, fence->sequence);
57		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
58		FIRE_RING (chan);
59	}
60
61	return ret;
62}
63
64static int
65nvc0_fence_sync(struct nouveau_fence *fence,
66		struct nouveau_channel *prev, struct nouveau_channel *chan)
67{
68	struct nvc0_fence_chan *fctx = chan->fence;
69	u64 addr = fctx->vma.offset + prev->id * 16;
70	int ret;
71
72	ret = RING_SPACE(chan, 5);
73	if (ret == 0) {
74		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
75		OUT_RING  (chan, upper_32_bits(addr));
76		OUT_RING  (chan, lower_32_bits(addr));
77		OUT_RING  (chan, fence->sequence);
78		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL |
79				 NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
80		FIRE_RING (chan);
81	}
82
83	return ret;
84}
85
86static u32
87nvc0_fence_read(struct nouveau_channel *chan)
88{
89	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
90	struct nvc0_fence_priv *priv = dev_priv->fence.func;
91	return nouveau_bo_rd32(priv->bo, chan->id * 16/4);
92}
93
94static void
95nvc0_fence_context_del(struct nouveau_channel *chan)
96{
97	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
98	struct nvc0_fence_priv *priv = dev_priv->fence.func;
99	struct nvc0_fence_chan *fctx = chan->fence;
100
101	nouveau_bo_vma_del(priv->bo, &fctx->vma);
102	nouveau_fence_context_del(&fctx->base);
103	chan->fence = NULL;
104	kfree(fctx);
105}
106
107static int
108nvc0_fence_context_new(struct nouveau_channel *chan)
109{
110	struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
111	struct nvc0_fence_priv *priv = dev_priv->fence.func;
112	struct nvc0_fence_chan *fctx;
113	int ret;
114
115	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
116	if (!fctx)
117		return -ENOMEM;
118
119	nouveau_fence_context_new(&fctx->base);
120
121	ret = nouveau_bo_vma_add(priv->bo, chan->vm, &fctx->vma);
122	if (ret)
123		nvc0_fence_context_del(chan);
124
125	nouveau_bo_wr32(priv->bo, chan->id * 16/4, 0x00000000);
126	return ret;
127}
128
129static bool
130nvc0_fence_suspend(struct drm_device *dev)
131{
132	struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
133	struct drm_nouveau_private *dev_priv = dev->dev_private;
134	struct nvc0_fence_priv *priv = dev_priv->fence.func;
135	int i;
136
137	priv->suspend = vmalloc(pfifo->channels * sizeof(u32));
138	if (priv->suspend) {
139		for (i = 0; i < pfifo->channels; i++)
140			priv->suspend[i] = nouveau_bo_rd32(priv->bo, i);
141	}
142
143	return priv->suspend != NULL;
144}
145
146static void
147nvc0_fence_resume(struct drm_device *dev)
148{
149	struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
150	struct drm_nouveau_private *dev_priv = dev->dev_private;
151	struct nvc0_fence_priv *priv = dev_priv->fence.func;
152	int i;
153
154	if (priv->suspend) {
155		for (i = 0; i < pfifo->channels; i++)
156			nouveau_bo_wr32(priv->bo, i, priv->suspend[i]);
157		vfree(priv->suspend);
158		priv->suspend = NULL;
159	}
160}
161
162static void
163nvc0_fence_destroy(struct drm_device *dev)
164{
165	struct drm_nouveau_private *dev_priv = dev->dev_private;
166	struct nvc0_fence_priv *priv = dev_priv->fence.func;
167
168	nouveau_bo_unmap(priv->bo);
169	nouveau_bo_ref(NULL, &priv->bo);
170	dev_priv->fence.func = NULL;
171	kfree(priv);
172}
173
174int
175nvc0_fence_create(struct drm_device *dev)
176{
177	struct nouveau_fifo_priv *pfifo = nv_engine(dev, NVOBJ_ENGINE_FIFO);
178	struct drm_nouveau_private *dev_priv = dev->dev_private;
179	struct nvc0_fence_priv *priv;
180	int ret;
181
182	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
183	if (!priv)
184		return -ENOMEM;
185
186	priv->base.dtor = nvc0_fence_destroy;
187	priv->base.suspend = nvc0_fence_suspend;
188	priv->base.resume = nvc0_fence_resume;
189	priv->base.context_new = nvc0_fence_context_new;
190	priv->base.context_del = nvc0_fence_context_del;
191	priv->base.emit = nvc0_fence_emit;
192	priv->base.sync = nvc0_fence_sync;
193	priv->base.read = nvc0_fence_read;
194	dev_priv->fence.func = priv;
195
196	ret = nouveau_bo_new(dev, 16 * pfifo->channels, 0, TTM_PL_FLAG_VRAM,
197			     0, 0, NULL, &priv->bo);
198	if (ret == 0) {
199		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
200		if (ret == 0)
201			ret = nouveau_bo_map(priv->bo);
202		if (ret)
203			nouveau_bo_ref(NULL, &priv->bo);
204	}
205
206	if (ret)
207		nvc0_fence_destroy(dev);
208	return ret;
209}
210