drivers/gpu/drm/bochs/bochs_drv.c

   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
  13 static int bochs_modeset = -1;
  14 module_param_named(modeset, bochs_modeset, int, 0444);
  15 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  16
  17 /* ---------------------------------------------------------------------- */
  18 /* drm interface                                                          */
  19
  20 static 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
  31 static 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
  56 err:
  57         bochs_unload(dev);
  58         return ret;
  59 }
  60
  61 static const struct file_operations bochs_fops = {
  62         .owner          = THIS_MODULE,
  63         DRM_VRAM_MM_FILE_OPERATIONS
  64 };
  65
  66 static 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
  81 static int bochs_pm_suspend(struct device *dev)
  82 {
  83         struct pci_dev *pdev = to_pci_dev(dev);
  84         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  85
  86         return drm_mode_config_helper_suspend(drm_dev);
  87 }
  88
  89 static int bochs_pm_resume(struct device *dev)
  90 {
  91         struct pci_dev *pdev = to_pci_dev(dev);
  92         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  93
  94         return drm_mode_config_helper_resume(drm_dev);
  95 }
  96 #endif
  97
  98 static const struct dev_pm_ops bochs_pm_ops = {
  99         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 100                                 bochs_pm_resume)
 101 };
 102
 103 /* ---------------------------------------------------------------------- */
 104 /* pci interface                                                          */
 105
 106 static int bochs_pci_probe(struct pci_dev *pdev,
 107                            const struct pci_device_id *ent)
 108 {
 109         struct drm_device *dev;
 110         unsigned long fbsize;
 111         int ret;
 112
 113         fbsize = pci_resource_len(pdev, 0);
 114         if (fbsize < 4 * 1024 * 1024) {
 115                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 116                 return -ENOMEM;
 117         }
 118
 119         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "bochsdrmfb");
 120         if (ret)
 121                 return ret;
 122
 123         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 124         if (IS_ERR(dev))
 125                 return PTR_ERR(dev);
 126
 127         ret = pci_enable_device(pdev);
 128         if (ret)
 129                 goto err_free_dev;
 130
 131         dev->pdev = pdev;
 132         pci_set_drvdata(pdev, dev);
 133
 134         ret = bochs_load(dev);
 135         if (ret)
 136                 goto err_free_dev;
 137
 138         ret = drm_dev_register(dev, 0);
 139         if (ret)
 140                 goto err_unload;
 141
 142         drm_fbdev_generic_setup(dev, 32);
 143         return ret;
 144
 145 err_unload:
 146         bochs_unload(dev);
 147 err_free_dev:
 148         drm_dev_put(dev);
 149         return ret;
 150 }
 151
 152 static void bochs_pci_remove(struct pci_dev *pdev)
 153 {
 154         struct drm_device *dev = pci_get_drvdata(pdev);
 155
 156         drm_atomic_helper_shutdown(dev);
 157         drm_dev_unregister(dev);
 158         bochs_unload(dev);
 159         drm_dev_put(dev);
 160 }
 161
 162 static const struct pci_device_id bochs_pci_tbl[] = {
 163         {
 164                 .vendor      = 0x1234,
 165                 .device      = 0x1111,
 166                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 167                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 168                 .driver_data = BOCHS_QEMU_STDVGA,
 169         },
 170         {
 171                 .vendor      = 0x1234,
 172                 .device      = 0x1111,
 173                 .subvendor   = PCI_ANY_ID,
 174                 .subdevice   = PCI_ANY_ID,
 175                 .driver_data = BOCHS_UNKNOWN,
 176         },
 177         { /* end of list */ }
 178 };
 179
 180 static struct pci_driver bochs_pci_driver = {
 181         .name =         "bochs-drm",
 182         .id_table =     bochs_pci_tbl,
 183         .probe =        bochs_pci_probe,
 184         .remove =       bochs_pci_remove,
 185         .driver.pm =    &bochs_pm_ops,
 186 };
 187
 188 /* ---------------------------------------------------------------------- */
 189 /* module init/exit                                                       */
 190
 191 static int __init bochs_init(void)
 192 {
 193         if (vgacon_text_force() && bochs_modeset == -1)
 194                 return -EINVAL;
 195
 196         if (bochs_modeset == 0)
 197                 return -EINVAL;
 198
 199         return pci_register_driver(&bochs_pci_driver);
 200 }
 201
 202 static void __exit bochs_exit(void)
 203 {
 204         pci_unregister_driver(&bochs_pci_driver);
 205 }
 206
 207 module_init(bochs_init);
 208 module_exit(bochs_exit);
 209
 210 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 211 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 212 MODULE_LICENSE("GPL");