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