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 DEFINE_DRM_GEM_FOPS(bochs_fops);
  62
  63 static struct drm_driver bochs_driver = {
  64         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  65         .fops                   = &bochs_fops,
  66         .name                   = "bochs-drm",
  67         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  68         .date                   = "20130925",
  69         .major                  = 1,
  70         .minor                  = 0,
  71         DRM_GEM_VRAM_DRIVER,
  72 };
  73
  74 /* ---------------------------------------------------------------------- */
  75 /* pm interface                                                           */
  76
  77 #ifdef CONFIG_PM_SLEEP
  78 static int bochs_pm_suspend(struct device *dev)
  79 {
  80         struct drm_device *drm_dev = dev_get_drvdata(dev);
  81
  82         return drm_mode_config_helper_suspend(drm_dev);
  83 }
  84
  85 static int bochs_pm_resume(struct device *dev)
  86 {
  87         struct drm_device *drm_dev = dev_get_drvdata(dev);
  88
  89         return drm_mode_config_helper_resume(drm_dev);
  90 }
  91 #endif
  92
  93 static const struct dev_pm_ops bochs_pm_ops = {
  94         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
  95                                 bochs_pm_resume)
  96 };
  97
  98 /* ---------------------------------------------------------------------- */
  99 /* pci interface                                                          */
 100
 101 static int bochs_pci_probe(struct pci_dev *pdev,
 102                            const struct pci_device_id *ent)
 103 {
 104         struct drm_device *dev;
 105         unsigned long fbsize;
 106         int ret;
 107
 108         fbsize = pci_resource_len(pdev, 0);
 109         if (fbsize < 4 * 1024 * 1024) {
 110                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 111                 return -ENOMEM;
 112         }
 113
 114         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "bochsdrmfb");
 115         if (ret)
 116                 return ret;
 117
 118         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 119         if (IS_ERR(dev))
 120                 return PTR_ERR(dev);
 121
 122         ret = pci_enable_device(pdev);
 123         if (ret)
 124                 goto err_free_dev;
 125
 126         dev->pdev = pdev;
 127         pci_set_drvdata(pdev, dev);
 128
 129         ret = bochs_load(dev);
 130         if (ret)
 131                 goto err_free_dev;
 132
 133         ret = drm_dev_register(dev, 0);
 134         if (ret)
 135                 goto err_unload;
 136
 137         drm_fbdev_generic_setup(dev, 32);
 138         return ret;
 139
 140 err_unload:
 141         bochs_unload(dev);
 142 err_free_dev:
 143         drm_dev_put(dev);
 144         return ret;
 145 }
 146
 147 static void bochs_pci_remove(struct pci_dev *pdev)
 148 {
 149         struct drm_device *dev = pci_get_drvdata(pdev);
 150
 151         drm_atomic_helper_shutdown(dev);
 152         drm_dev_unregister(dev);
 153         bochs_unload(dev);
 154         drm_dev_put(dev);
 155 }
 156
 157 static const struct pci_device_id bochs_pci_tbl[] = {
 158         {
 159                 .vendor      = 0x1234,
 160                 .device      = 0x1111,
 161                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 162                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 163                 .driver_data = BOCHS_QEMU_STDVGA,
 164         },
 165         {
 166                 .vendor      = 0x1234,
 167                 .device      = 0x1111,
 168                 .subvendor   = PCI_ANY_ID,
 169                 .subdevice   = PCI_ANY_ID,
 170                 .driver_data = BOCHS_UNKNOWN,
 171         },
 172         { /* end of list */ }
 173 };
 174
 175 static struct pci_driver bochs_pci_driver = {
 176         .name =         "bochs-drm",
 177         .id_table =     bochs_pci_tbl,
 178         .probe =        bochs_pci_probe,
 179         .remove =       bochs_pci_remove,
 180         .driver.pm =    &bochs_pm_ops,
 181 };
 182
 183 /* ---------------------------------------------------------------------- */
 184 /* module init/exit                                                       */
 185
 186 static int __init bochs_init(void)
 187 {
 188         if (vgacon_text_force() && bochs_modeset == -1)
 189                 return -EINVAL;
 190
 191         if (bochs_modeset == 0)
 192                 return -EINVAL;
 193
 194         return pci_register_driver(&bochs_pci_driver);
 195 }
 196
 197 static void __exit bochs_exit(void)
 198 {
 199         pci_unregister_driver(&bochs_pci_driver);
 200 }
 201
 202 module_init(bochs_init);
 203 module_exit(bochs_exit);
 204
 205 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 206 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 207 MODULE_LICENSE("GPL");