534227df23f355722e3ed6d1479bd60e12f75732
[releases.git] / bochs_drv.c
1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 2 of the License, or
5  * (at your option) any later version.
6  */
7
8 #include <linux/mm.h>
9 #include <linux/module.h>
10 #include <linux/slab.h>
11 #include <drm/drm_fb_helper.h>
12
13 #include "bochs.h"
14
15 static bool enable_fbdev = true;
16 module_param_named(fbdev, enable_fbdev, bool, 0444);
17 MODULE_PARM_DESC(fbdev, "register fbdev device");
18
19 /* ---------------------------------------------------------------------- */
20 /* drm interface                                                          */
21
22 static int bochs_unload(struct drm_device *dev)
23 {
24         struct bochs_device *bochs = dev->dev_private;
25
26         bochs_fbdev_fini(bochs);
27         bochs_kms_fini(bochs);
28         bochs_mm_fini(bochs);
29         bochs_hw_fini(dev);
30         kfree(bochs);
31         dev->dev_private = NULL;
32         return 0;
33 }
34
35 static int bochs_load(struct drm_device *dev, unsigned long flags)
36 {
37         struct bochs_device *bochs;
38         int ret;
39
40         bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
41         if (bochs == NULL)
42                 return -ENOMEM;
43         dev->dev_private = bochs;
44         bochs->dev = dev;
45
46         ret = bochs_hw_init(dev, flags);
47         if (ret)
48                 goto err;
49
50         ret = bochs_mm_init(bochs);
51         if (ret)
52                 goto err;
53
54         ret = bochs_kms_init(bochs);
55         if (ret)
56                 goto err;
57
58         if (enable_fbdev)
59                 bochs_fbdev_init(bochs);
60
61         return 0;
62
63 err:
64         bochs_unload(dev);
65         return ret;
66 }
67
68 static const struct file_operations bochs_fops = {
69         .owner          = THIS_MODULE,
70         .open           = drm_open,
71         .release        = drm_release,
72         .unlocked_ioctl = drm_ioctl,
73 #ifdef CONFIG_COMPAT
74         .compat_ioctl   = drm_compat_ioctl,
75 #endif
76         .poll           = drm_poll,
77         .read           = drm_read,
78         .llseek         = no_llseek,
79         .mmap           = bochs_mmap,
80 };
81
82 static struct drm_driver bochs_driver = {
83         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
84         .load                   = bochs_load,
85         .unload                 = bochs_unload,
86         .set_busid              = drm_pci_set_busid,
87         .fops                   = &bochs_fops,
88         .name                   = "bochs-drm",
89         .desc                   = "bochs dispi vga interface (qemu stdvga)",
90         .date                   = "20130925",
91         .major                  = 1,
92         .minor                  = 0,
93         .gem_free_object_unlocked = bochs_gem_free_object,
94         .dumb_create            = bochs_dumb_create,
95         .dumb_map_offset        = bochs_dumb_mmap_offset,
96         .dumb_destroy           = drm_gem_dumb_destroy,
97 };
98
99 /* ---------------------------------------------------------------------- */
100 /* pm interface                                                           */
101
102 #ifdef CONFIG_PM_SLEEP
103 static int bochs_pm_suspend(struct device *dev)
104 {
105         struct pci_dev *pdev = to_pci_dev(dev);
106         struct drm_device *drm_dev = pci_get_drvdata(pdev);
107         struct bochs_device *bochs = drm_dev->dev_private;
108
109         drm_kms_helper_poll_disable(drm_dev);
110
111         if (bochs->fb.initialized) {
112                 console_lock();
113                 drm_fb_helper_set_suspend(&bochs->fb.helper, 1);
114                 console_unlock();
115         }
116
117         return 0;
118 }
119
120 static int bochs_pm_resume(struct device *dev)
121 {
122         struct pci_dev *pdev = to_pci_dev(dev);
123         struct drm_device *drm_dev = pci_get_drvdata(pdev);
124         struct bochs_device *bochs = drm_dev->dev_private;
125
126         drm_helper_resume_force_mode(drm_dev);
127
128         if (bochs->fb.initialized) {
129                 console_lock();
130                 drm_fb_helper_set_suspend(&bochs->fb.helper, 0);
131                 console_unlock();
132         }
133
134         drm_kms_helper_poll_enable(drm_dev);
135         return 0;
136 }
137 #endif
138
139 static const struct dev_pm_ops bochs_pm_ops = {
140         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
141                                 bochs_pm_resume)
142 };
143
144 /* ---------------------------------------------------------------------- */
145 /* pci interface                                                          */
146
147 static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
148 {
149         struct apertures_struct *ap;
150
151         ap = alloc_apertures(1);
152         if (!ap)
153                 return -ENOMEM;
154
155         ap->ranges[0].base = pci_resource_start(pdev, 0);
156         ap->ranges[0].size = pci_resource_len(pdev, 0);
157         drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
158         kfree(ap);
159
160         return 0;
161 }
162
163 static int bochs_pci_probe(struct pci_dev *pdev,
164                            const struct pci_device_id *ent)
165 {
166         unsigned long fbsize;
167         int ret;
168
169         fbsize = pci_resource_len(pdev, 0);
170         if (fbsize < 4 * 1024 * 1024) {
171                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
172                 return -ENOMEM;
173         }
174
175         ret = bochs_kick_out_firmware_fb(pdev);
176         if (ret)
177                 return ret;
178
179         return drm_get_pci_dev(pdev, ent, &bochs_driver);
180 }
181
182 static void bochs_pci_remove(struct pci_dev *pdev)
183 {
184         struct drm_device *dev = pci_get_drvdata(pdev);
185
186         drm_put_dev(dev);
187 }
188
189 static const struct pci_device_id bochs_pci_tbl[] = {
190         {
191                 .vendor      = 0x1234,
192                 .device      = 0x1111,
193                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
194                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
195                 .driver_data = BOCHS_QEMU_STDVGA,
196         },
197         {
198                 .vendor      = 0x1234,
199                 .device      = 0x1111,
200                 .subvendor   = PCI_ANY_ID,
201                 .subdevice   = PCI_ANY_ID,
202                 .driver_data = BOCHS_UNKNOWN,
203         },
204         { /* end of list */ }
205 };
206
207 static struct pci_driver bochs_pci_driver = {
208         .name =         "bochs-drm",
209         .id_table =     bochs_pci_tbl,
210         .probe =        bochs_pci_probe,
211         .remove =       bochs_pci_remove,
212         .driver.pm =    &bochs_pm_ops,
213 };
214
215 /* ---------------------------------------------------------------------- */
216 /* module init/exit                                                       */
217
218 static int __init bochs_init(void)
219 {
220         return drm_pci_init(&bochs_driver, &bochs_pci_driver);
221 }
222
223 static void __exit bochs_exit(void)
224 {
225         drm_pci_exit(&bochs_driver, &bochs_pci_driver);
226 }
227
228 module_init(bochs_init);
229 module_exit(bochs_exit);
230
231 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
232 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
233 MODULE_LICENSE("GPL");