drivers/gpu/drm/bochs/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
  12 #include "bochs.h"
  13
  14 static bool enable_fbdev = true;
  15 module_param_named(fbdev, enable_fbdev, bool, 0444);
  16 MODULE_PARM_DESC(fbdev, "register fbdev device");
  17
  18 /* ---------------------------------------------------------------------- */
  19 /* drm interface                                                          */
  20
  21 static 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
  34 static 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
  62 err:
  63         bochs_unload(dev);
  64         return ret;
  65 }
  66
  67 static 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
  81 static struct drm_driver bochs_driver = {
  82         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
  83         .load                   = bochs_load,
  84         .unload                 = bochs_unload,
  85         .fops                   = &bochs_fops,
  86         .name                   = "bochs-drm",
  87         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  88         .date                   = "20130925",
  89         .major                  = 1,
  90         .minor                  = 0,
  91         .gem_free_object        = bochs_gem_free_object,
  92         .dumb_create            = bochs_dumb_create,
  93         .dumb_map_offset        = bochs_dumb_mmap_offset,
  94         .dumb_destroy           = drm_gem_dumb_destroy,
  95 };
  96
  97 /* ---------------------------------------------------------------------- */
  98 /* pm interface                                                           */
  99
 100 #ifdef CONFIG_PM_SLEEP
 101 static int bochs_pm_suspend(struct device *dev)
 102 {
 103         struct pci_dev *pdev = to_pci_dev(dev);
 104         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 105         struct bochs_device *bochs = drm_dev->dev_private;
 106
 107         drm_kms_helper_poll_disable(drm_dev);
 108
 109         if (bochs->fb.initialized) {
 110                 console_lock();
 111                 fb_set_suspend(bochs->fb.helper.fbdev, 1);
 112                 console_unlock();
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int bochs_pm_resume(struct device *dev)
 119 {
 120         struct pci_dev *pdev = to_pci_dev(dev);
 121         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 122         struct bochs_device *bochs = drm_dev->dev_private;
 123
 124         drm_helper_resume_force_mode(drm_dev);
 125
 126         if (bochs->fb.initialized) {
 127                 console_lock();
 128                 fb_set_suspend(bochs->fb.helper.fbdev, 0);
 129                 console_unlock();
 130         }
 131
 132         drm_kms_helper_poll_enable(drm_dev);
 133         return 0;
 134 }
 135 #endif
 136
 137 static const struct dev_pm_ops bochs_pm_ops = {
 138         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 139                                 bochs_pm_resume)
 140 };
 141
 142 /* ---------------------------------------------------------------------- */
 143 /* pci interface                                                          */
 144
 145 static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
 146 {
 147         struct apertures_struct *ap;
 148
 149         ap = alloc_apertures(1);
 150         if (!ap)
 151                 return -ENOMEM;
 152
 153         ap->ranges[0].base = pci_resource_start(pdev, 0);
 154         ap->ranges[0].size = pci_resource_len(pdev, 0);
 155         remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
 156         kfree(ap);
 157
 158         return 0;
 159 }
 160
 161 static int bochs_pci_probe(struct pci_dev *pdev,
 162                            const struct pci_device_id *ent)
 163 {
 164         int ret;
 165
 166         ret = bochs_kick_out_firmware_fb(pdev);
 167         if (ret)
 168                 return ret;
 169
 170         return drm_get_pci_dev(pdev, ent, &bochs_driver);
 171 }
 172
 173 static void bochs_pci_remove(struct pci_dev *pdev)
 174 {
 175         struct drm_device *dev = pci_get_drvdata(pdev);
 176
 177         drm_put_dev(dev);
 178 }
 179
 180 static const struct pci_device_id bochs_pci_tbl[] = {
 181         {
 182                 .vendor      = 0x1234,
 183                 .device      = 0x1111,
 184                 .subvendor   = 0x1af4,
 185                 .subdevice   = 0x1100,
 186                 .driver_data = BOCHS_QEMU_STDVGA,
 187         },
 188         {
 189                 .vendor      = 0x1234,
 190                 .device      = 0x1111,
 191                 .subvendor   = PCI_ANY_ID,
 192                 .subdevice   = PCI_ANY_ID,
 193                 .driver_data = BOCHS_UNKNOWN,
 194         },
 195         { /* end of list */ }
 196 };
 197
 198 static struct pci_driver bochs_pci_driver = {
 199         .name =         "bochs-drm",
 200         .id_table =     bochs_pci_tbl,
 201         .probe =        bochs_pci_probe,
 202         .remove =       bochs_pci_remove,
 203         .driver.pm =    &bochs_pm_ops,
 204 };
 205
 206 /* ---------------------------------------------------------------------- */
 207 /* module init/exit                                                       */
 208
 209 static int __init bochs_init(void)
 210 {
 211         return drm_pci_init(&bochs_driver, &bochs_pci_driver);
 212 }
 213
 214 static void __exit bochs_exit(void)
 215 {
 216         drm_pci_exit(&bochs_driver, &bochs_pci_driver);
 217 }
 218
 219 module_init(bochs_init);
 220 module_exit(bochs_exit);
 221
 222 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 223 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 224 MODULE_LICENSE("GPL");