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 drm_device *drm_dev = dev_get_drvdata(dev);
  84
  85         return drm_mode_config_helper_suspend(drm_dev);
  86 }
  87
  88 static 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
  96 static 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
 104 static 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
 143 err_unload:
 144         bochs_unload(dev);
 145 err_free_dev:
 146         drm_dev_put(dev);
 147         return ret;
 148 }
 149
 150 static 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
 160 static 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
 178 static 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
 189 static 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
 200 static void __exit bochs_exit(void)
 201 {
 202         pci_unregister_driver(&bochs_pci_driver);
 203 }
 204
 205 module_init(bochs_init);
 206 module_exit(bochs_exit);
 207
 208 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 209 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 210 MODULE_LICENSE("GPL");