1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 */
4
5 #include <linux/module.h>
6 #include <linux/pci.h>
7
8 #include <drm/drm_drv.h>
9 #include <drm/drm_atomic_helper.h>
10 #include <drm/drm_managed.h>
11
12 #include "bochs.h"
13
14 static int bochs_modeset = -1;
15 module_param_named(modeset, bochs_modeset, int, 0444);
16 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
17
18 /* ---------------------------------------------------------------------- */
19 /* drm interface */
20
bochs_unload(struct drm_device * dev)21 static void bochs_unload(struct drm_device *dev)
22 {
23 struct bochs_device *bochs = dev->dev_private;
24
25 bochs_mm_fini(bochs);
26 }
27
bochs_load(struct drm_device * dev)28 static int bochs_load(struct drm_device *dev)
29 {
30 struct bochs_device *bochs;
31 int ret;
32
33 bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
34 if (bochs == NULL)
35 return -ENOMEM;
36 dev->dev_private = bochs;
37 bochs->dev = dev;
38
39 ret = bochs_hw_init(dev);
40 if (ret)
41 goto err;
42
43 ret = bochs_mm_init(bochs);
44 if (ret)
45 goto err;
46
47 ret = bochs_kms_init(bochs);
48 if (ret)
49 goto err;
50
51 return 0;
52
53 err:
54 bochs_unload(dev);
55 return ret;
56 }
57
58 DEFINE_DRM_GEM_FOPS(bochs_fops);
59
60 static struct drm_driver bochs_driver = {
61 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
62 .fops = &bochs_fops,
63 .name = "bochs-drm",
64 .desc = "bochs dispi vga interface (qemu stdvga)",
65 .date = "20130925",
66 .major = 1,
67 .minor = 0,
68 DRM_GEM_VRAM_DRIVER,
69 .release = bochs_unload,
70 };
71
72 /* ---------------------------------------------------------------------- */
73 /* pm interface */
74
75 #ifdef CONFIG_PM_SLEEP
bochs_pm_suspend(struct device * dev)76 static int bochs_pm_suspend(struct device *dev)
77 {
78 struct drm_device *drm_dev = dev_get_drvdata(dev);
79
80 return drm_mode_config_helper_suspend(drm_dev);
81 }
82
bochs_pm_resume(struct device * dev)83 static int bochs_pm_resume(struct device *dev)
84 {
85 struct drm_device *drm_dev = dev_get_drvdata(dev);
86
87 return drm_mode_config_helper_resume(drm_dev);
88 }
89 #endif
90
91 static const struct dev_pm_ops bochs_pm_ops = {
92 SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
93 bochs_pm_resume)
94 };
95
96 /* ---------------------------------------------------------------------- */
97 /* pci interface */
98
bochs_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)99 static int bochs_pci_probe(struct pci_dev *pdev,
100 const struct pci_device_id *ent)
101 {
102 struct drm_device *dev;
103 unsigned long fbsize;
104 int ret;
105
106 fbsize = pci_resource_len(pdev, 0);
107 if (fbsize < 4 * 1024 * 1024) {
108 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
109 return -ENOMEM;
110 }
111
112 ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "bochsdrmfb");
113 if (ret)
114 return ret;
115
116 dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
117 if (IS_ERR(dev))
118 return PTR_ERR(dev);
119
120 ret = pci_enable_device(pdev);
121 if (ret)
122 goto err_free_dev;
123
124 dev->pdev = pdev;
125 pci_set_drvdata(pdev, dev);
126
127 ret = bochs_load(dev);
128 if (ret)
129 goto err_free_dev;
130
131 ret = drm_dev_register(dev, 0);
132 if (ret)
133 goto err_unload;
134
135 drm_fbdev_generic_setup(dev, 32);
136 return ret;
137
138 err_unload:
139 bochs_unload(dev);
140 err_free_dev:
141 drm_dev_put(dev);
142 return ret;
143 }
144
bochs_pci_remove(struct pci_dev * pdev)145 static void bochs_pci_remove(struct pci_dev *pdev)
146 {
147 struct drm_device *dev = pci_get_drvdata(pdev);
148
149 drm_dev_unplug(dev);
150 drm_atomic_helper_shutdown(dev);
151 bochs_hw_fini(dev);
152 drm_dev_put(dev);
153 }
154
155 static const struct pci_device_id bochs_pci_tbl[] = {
156 {
157 .vendor = 0x1234,
158 .device = 0x1111,
159 .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
160 .subdevice = PCI_SUBDEVICE_ID_QEMU,
161 .driver_data = BOCHS_QEMU_STDVGA,
162 },
163 {
164 .vendor = 0x1234,
165 .device = 0x1111,
166 .subvendor = PCI_ANY_ID,
167 .subdevice = PCI_ANY_ID,
168 .driver_data = BOCHS_UNKNOWN,
169 },
170 { /* end of list */ }
171 };
172
173 static struct pci_driver bochs_pci_driver = {
174 .name = "bochs-drm",
175 .id_table = bochs_pci_tbl,
176 .probe = bochs_pci_probe,
177 .remove = bochs_pci_remove,
178 .driver.pm = &bochs_pm_ops,
179 };
180
181 /* ---------------------------------------------------------------------- */
182 /* module init/exit */
183
bochs_init(void)184 static int __init bochs_init(void)
185 {
186 if (vgacon_text_force() && bochs_modeset == -1)
187 return -EINVAL;
188
189 if (bochs_modeset == 0)
190 return -EINVAL;
191
192 return pci_register_driver(&bochs_pci_driver);
193 }
194
bochs_exit(void)195 static void __exit bochs_exit(void)
196 {
197 pci_unregister_driver(&bochs_pci_driver);
198 }
199
200 module_init(bochs_init);
201 module_exit(bochs_exit);
202
203 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
204 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
205 MODULE_LICENSE("GPL");
206