summaryrefslogtreecommitdiff
path: root/shared-core/nouveau_notifier.c
blob: 3021629377c795fd80aa139885a5cdd88a788e38 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
/*
 * Copyright (C) 2007 Ben Skeggs.
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include "drmP.h"
#include "drm.h"
#include "nouveau_drv.h"

int
nouveau_notifier_init_channel(drm_device_t *dev, int channel, DRMFILE filp)
{
	drm_nouveau_private_t *dev_priv = dev->dev_private;
	struct nouveau_fifo *chan = dev_priv->fifos[channel];
	int flags, ret;

	/*TODO: PCI notifier blocks */
	if (dev_priv->agp_heap)
		flags = NOUVEAU_MEM_AGP | NOUVEAU_MEM_FB_ACCEPTABLE;
	else
		flags = NOUVEAU_MEM_FB;
	flags |= NOUVEAU_MEM_MAPPED;

	chan->notifier_block = nouveau_mem_alloc(dev, 0, PAGE_SIZE, flags,filp);
	if (!chan->notifier_block)
		return DRM_ERR(ENOMEM);

	ret = nouveau_mem_init_heap(&chan->notifier_heap,
				    0, chan->notifier_block->size);
	if (ret)
		return ret;

	return 0;
}

void
nouveau_notifier_takedown_channel(drm_device_t *dev, int channel)
{
	drm_nouveau_private_t *dev_priv = dev->dev_private;
	struct nouveau_fifo *chan = dev_priv->fifos[channel];

	if (chan->notifier_block) {
		nouveau_mem_free(dev, chan->notifier_block);
		chan->notifier_block = NULL;
	}

	/*XXX: heap destroy */
}

int
nouveau_notifier_alloc(drm_device_t *dev, int channel, uint32_t handle,
		       int count, uint32_t *b_offset)
{
	drm_nouveau_private_t *dev_priv = dev->dev_private;
	struct nouveau_fifo *chan = dev_priv->fifos[channel];
	nouveau_gpuobj_t *nobj = NULL;
	struct mem_block *mem;
	uint32_t offset;
	int target, ret;

	if (!chan->notifier_heap) {
		DRM_ERROR("Channel %d doesn't have a notifier heap!\n",
			  channel);
		return DRM_ERR(EINVAL);
	}

	mem = nouveau_mem_alloc_block(chan->notifier_heap, 32, 0, chan->filp);
	if (!mem) {
		DRM_ERROR("Channel %d notifier block full\n", channel);
		return DRM_ERR(ENOMEM);
	}
	mem->flags = NOUVEAU_MEM_NOTIFIER;

	offset = chan->notifier_block->start + mem->start;
	if (chan->notifier_block->flags & NOUVEAU_MEM_FB) {
		offset -= drm_get_resource_start(dev, 1);
		target = NV_DMA_TARGET_VIDMEM;
	} else if (chan->notifier_block->flags & NOUVEAU_MEM_AGP) {
		offset -= dev_priv->agp_phys;
		target = NV_DMA_TARGET_AGP;
	} else {
		DRM_ERROR("Bad DMA target, flags 0x%08x!\n",
			  chan->notifier_block->flags);
		return DRM_ERR(EINVAL);
	}

	if ((ret = nouveau_gpuobj_dma_new(dev, channel, NV_CLASS_DMA_IN_MEMORY,
					  offset, mem->size,
					  NV_DMA_ACCESS_RW, target, &nobj))) {
		nouveau_mem_free_block(mem);
		DRM_ERROR("Error creating notifier ctxdma: %d\n", ret);
		return ret;
	}

	if ((ret = nouveau_gpuobj_ref_add(dev, channel, handle, nobj, NULL))) {
		nouveau_gpuobj_del(dev, &nobj);
		nouveau_mem_free_block(mem);
		DRM_ERROR("Error referencing notifier ctxdma: %d\n", ret);
		return ret;
	}

	*b_offset = mem->start;
	return 0;
}

int
nouveau_ioctl_notifier_alloc(DRM_IOCTL_ARGS)
{
	DRM_DEVICE;
	drm_nouveau_notifier_alloc_t na;
	int ret;

	DRM_COPY_FROM_USER_IOCTL(na, (drm_nouveau_notifier_alloc_t __user*)data,
				 sizeof(na));

	if (!nouveau_fifo_owner(dev, filp, na.channel)) {
		DRM_ERROR("pid %d doesn't own channel %d\n",
			  DRM_CURRENTPID, na.channel);
		return DRM_ERR(EPERM);
	}

	ret = nouveau_notifier_alloc(dev, na.channel, na.handle,
				     na.count, &na.offset);
	if (ret)
		return ret;

	DRM_COPY_TO_USER_IOCTL((drm_nouveau_notifier_alloc_t __user*)data,
			       na, sizeof(na));
	return 0;
}