This source file includes following definitions.
- vkms_release
- vkms_atomic_commit_tail
- vkms_modeset_init
- vkms_init
- vkms_exit
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12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14
15 #include <drm/drm_atomic.h>
16 #include <drm/drm_atomic_helper.h>
17 #include <drm/drm_drv.h>
18 #include <drm/drm_fb_helper.h>
19 #include <drm/drm_file.h>
20 #include <drm/drm_gem.h>
21 #include <drm/drm_gem_framebuffer_helper.h>
22 #include <drm/drm_ioctl.h>
23 #include <drm/drm_probe_helper.h>
24 #include <drm/drm_vblank.h>
25
26 #include "vkms_drv.h"
27
28 #define DRIVER_NAME "vkms"
29 #define DRIVER_DESC "Virtual Kernel Mode Setting"
30 #define DRIVER_DATE "20180514"
31 #define DRIVER_MAJOR 1
32 #define DRIVER_MINOR 0
33
34 static struct vkms_device *vkms_device;
35
36 bool enable_cursor;
37 module_param_named(enable_cursor, enable_cursor, bool, 0444);
38 MODULE_PARM_DESC(enable_cursor, "Enable/Disable cursor support");
39
40 static const struct file_operations vkms_driver_fops = {
41 .owner = THIS_MODULE,
42 .open = drm_open,
43 .mmap = drm_gem_mmap,
44 .unlocked_ioctl = drm_ioctl,
45 .compat_ioctl = drm_compat_ioctl,
46 .poll = drm_poll,
47 .read = drm_read,
48 .llseek = no_llseek,
49 .release = drm_release,
50 };
51
52 static const struct vm_operations_struct vkms_gem_vm_ops = {
53 .fault = vkms_gem_fault,
54 .open = drm_gem_vm_open,
55 .close = drm_gem_vm_close,
56 };
57
58 static void vkms_release(struct drm_device *dev)
59 {
60 struct vkms_device *vkms = container_of(dev, struct vkms_device, drm);
61
62 platform_device_unregister(vkms->platform);
63 drm_atomic_helper_shutdown(&vkms->drm);
64 drm_mode_config_cleanup(&vkms->drm);
65 drm_dev_fini(&vkms->drm);
66 destroy_workqueue(vkms->output.composer_workq);
67 }
68
69 static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
70 {
71 struct drm_device *dev = old_state->dev;
72 struct drm_crtc *crtc;
73 struct drm_crtc_state *old_crtc_state;
74 int i;
75
76 drm_atomic_helper_commit_modeset_disables(dev, old_state);
77
78 drm_atomic_helper_commit_planes(dev, old_state, 0);
79
80 drm_atomic_helper_commit_modeset_enables(dev, old_state);
81
82 drm_atomic_helper_fake_vblank(old_state);
83
84 drm_atomic_helper_commit_hw_done(old_state);
85
86 drm_atomic_helper_wait_for_vblanks(dev, old_state);
87
88 for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
89 struct vkms_crtc_state *vkms_state =
90 to_vkms_crtc_state(old_crtc_state);
91
92 flush_work(&vkms_state->composer_work);
93 }
94
95 drm_atomic_helper_cleanup_planes(dev, old_state);
96 }
97
98 static struct drm_driver vkms_driver = {
99 .driver_features = DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
100 .release = vkms_release,
101 .fops = &vkms_driver_fops,
102 .dumb_create = vkms_dumb_create,
103 .gem_vm_ops = &vkms_gem_vm_ops,
104 .gem_free_object_unlocked = vkms_gem_free_object,
105 .get_vblank_timestamp = vkms_get_vblank_timestamp,
106
107 .name = DRIVER_NAME,
108 .desc = DRIVER_DESC,
109 .date = DRIVER_DATE,
110 .major = DRIVER_MAJOR,
111 .minor = DRIVER_MINOR,
112 };
113
114 static const struct drm_mode_config_funcs vkms_mode_funcs = {
115 .fb_create = drm_gem_fb_create,
116 .atomic_check = drm_atomic_helper_check,
117 .atomic_commit = drm_atomic_helper_commit,
118 };
119
120 static const struct drm_mode_config_helper_funcs vkms_mode_config_helpers = {
121 .atomic_commit_tail = vkms_atomic_commit_tail,
122 };
123
124 static int vkms_modeset_init(struct vkms_device *vkmsdev)
125 {
126 struct drm_device *dev = &vkmsdev->drm;
127
128 drm_mode_config_init(dev);
129 dev->mode_config.funcs = &vkms_mode_funcs;
130 dev->mode_config.min_width = XRES_MIN;
131 dev->mode_config.min_height = YRES_MIN;
132 dev->mode_config.max_width = XRES_MAX;
133 dev->mode_config.max_height = YRES_MAX;
134 dev->mode_config.preferred_depth = 24;
135 dev->mode_config.helper_private = &vkms_mode_config_helpers;
136
137 return vkms_output_init(vkmsdev, 0);
138 }
139
140 static int __init vkms_init(void)
141 {
142 int ret;
143
144 vkms_device = kzalloc(sizeof(*vkms_device), GFP_KERNEL);
145 if (!vkms_device)
146 return -ENOMEM;
147
148 vkms_device->platform =
149 platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
150 if (IS_ERR(vkms_device->platform)) {
151 ret = PTR_ERR(vkms_device->platform);
152 goto out_free;
153 }
154
155 ret = drm_dev_init(&vkms_device->drm, &vkms_driver,
156 &vkms_device->platform->dev);
157 if (ret)
158 goto out_unregister;
159
160 vkms_device->drm.irq_enabled = true;
161
162 ret = drm_vblank_init(&vkms_device->drm, 1);
163 if (ret) {
164 DRM_ERROR("Failed to vblank\n");
165 goto out_fini;
166 }
167
168 ret = vkms_modeset_init(vkms_device);
169 if (ret)
170 goto out_fini;
171
172 ret = drm_dev_register(&vkms_device->drm, 0);
173 if (ret)
174 goto out_fini;
175
176 return 0;
177
178 out_fini:
179 drm_dev_fini(&vkms_device->drm);
180
181 out_unregister:
182 platform_device_unregister(vkms_device->platform);
183
184 out_free:
185 kfree(vkms_device);
186 return ret;
187 }
188
189 static void __exit vkms_exit(void)
190 {
191 if (!vkms_device) {
192 DRM_INFO("vkms_device is NULL.\n");
193 return;
194 }
195
196 drm_dev_unregister(&vkms_device->drm);
197 drm_dev_put(&vkms_device->drm);
198
199 kfree(vkms_device);
200 }
201
202 module_init(vkms_init);
203 module_exit(vkms_exit);
204
205 MODULE_AUTHOR("Haneen Mohammed <hamohammed.sa@gmail.com>");
206 MODULE_AUTHOR("Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>");
207 MODULE_DESCRIPTION(DRIVER_DESC);
208 MODULE_LICENSE("GPL");