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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (C) 2015 Red Hat, Inc.
* 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 <linux/virtio.h>
#include <linux/virtio_config.h>
#include <drm/drmP.h>
#include "virtgpu_drv.h"
static int virtio_gpu_fbdev = 1;
MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);
static void virtio_gpu_config_changed_work_func(struct work_struct *work)
{
struct virtio_gpu_device *vgdev =
container_of(work, struct virtio_gpu_device,
config_changed_work);
u32 events_read, events_clear = 0;
/* read the config space */
virtio_cread(vgdev->vdev, struct virtio_gpu_config,
events_read, &events_read);
if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
virtio_gpu_cmd_get_display_info(vgdev);
drm_helper_hpd_irq_event(vgdev->ddev);
events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
}
virtio_cwrite(vgdev->vdev, struct virtio_gpu_config,
events_clear, &events_clear);
}
static void virtio_gpu_init_vq(struct virtio_gpu_queue *vgvq,
void (*work_func)(struct work_struct *work))
{
spin_lock_init(&vgvq->qlock);
init_waitqueue_head(&vgvq->ack_queue);
INIT_WORK(&vgvq->dequeue_work, work_func);
}
int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
{
static vq_callback_t *callbacks[] = {
virtio_gpu_ctrl_ack, virtio_gpu_cursor_ack
};
static const char *names[] = { "control", "cursor" };
struct virtio_gpu_device *vgdev;
/* this will expand later */
struct virtqueue *vqs[2];
u32 num_scanouts;
int ret;
if (!virtio_has_feature(dev->virtdev, VIRTIO_F_VERSION_1))
return -ENODEV;
vgdev = kzalloc(sizeof(struct virtio_gpu_device), GFP_KERNEL);
if (!vgdev)
return -ENOMEM;
vgdev->ddev = dev;
dev->dev_private = vgdev;
vgdev->vdev = dev->virtdev;
vgdev->dev = dev->dev;
spin_lock_init(&vgdev->display_info_lock);
spin_lock_init(&vgdev->ctx_id_idr_lock);
idr_init(&vgdev->ctx_id_idr);
spin_lock_init(&vgdev->resource_idr_lock);
idr_init(&vgdev->resource_idr);
init_waitqueue_head(&vgdev->resp_wq);
virtio_gpu_init_vq(&vgdev->ctrlq, virtio_gpu_dequeue_ctrl_func);
virtio_gpu_init_vq(&vgdev->cursorq, virtio_gpu_dequeue_cursor_func);
spin_lock_init(&vgdev->fence_drv.lock);
INIT_LIST_HEAD(&vgdev->fence_drv.fences);
INIT_WORK(&vgdev->config_changed_work,
virtio_gpu_config_changed_work_func);
ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
callbacks, names);
if (ret) {
DRM_ERROR("failed to find virt queues\n");
goto err_vqs;
}
vgdev->ctrlq.vq = vqs[0];
vgdev->cursorq.vq = vqs[1];
ret = virtio_gpu_alloc_vbufs(vgdev);
if (ret) {
DRM_ERROR("failed to alloc vbufs\n");
goto err_vbufs;
}
ret = virtio_gpu_ttm_init(vgdev);
if (ret) {
DRM_ERROR("failed to init ttm %d\n", ret);
goto err_ttm;
}
/* get display info */
virtio_cread(vgdev->vdev, struct virtio_gpu_config,
num_scanouts, &num_scanouts);
vgdev->num_scanouts = min_t(uint32_t, num_scanouts,
VIRTIO_GPU_MAX_SCANOUTS);
if (!vgdev->num_scanouts) {
DRM_ERROR("num_scanouts is zero\n");
ret = -EINVAL;
goto err_scanouts;
}
ret = virtio_gpu_modeset_init(vgdev);
if (ret)
goto err_modeset;
virtio_device_ready(vgdev->vdev);
vgdev->vqs_ready = true;
virtio_gpu_cmd_get_display_info(vgdev);
wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
5 * HZ);
if (virtio_gpu_fbdev)
virtio_gpu_fbdev_init(vgdev);
return 0;
err_modeset:
err_scanouts:
virtio_gpu_ttm_fini(vgdev);
err_ttm:
virtio_gpu_free_vbufs(vgdev);
err_vbufs:
vgdev->vdev->config->del_vqs(vgdev->vdev);
err_vqs:
kfree(vgdev);
return ret;
}
int virtio_gpu_driver_unload(struct drm_device *dev)
{
struct virtio_gpu_device *vgdev = dev->dev_private;
vgdev->vqs_ready = false;
flush_work(&vgdev->ctrlq.dequeue_work);
flush_work(&vgdev->cursorq.dequeue_work);
flush_work(&vgdev->config_changed_work);
vgdev->vdev->config->del_vqs(vgdev->vdev);
virtio_gpu_modeset_fini(vgdev);
virtio_gpu_ttm_fini(vgdev);
virtio_gpu_free_vbufs(vgdev);
kfree(vgdev);
return 0;
}
|
