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 #include <drm/drm_managed.h>
  11
  12 #include "bochs.h"
  13
  14 static int bochs_modeset = -1;
  15 module_param_named(modeset, bochs_modeset, int, 0444);
  16 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  17
  18 /* ---------------------------------------------------------------------- */
  19 /* drm interface                                                          */
  20
  21 static void bochs_unload(struct drm_device *dev)
  22 {
  23         struct bochs_device *bochs = dev->dev_private;
  24
  25         bochs_mm_fini(bochs);
  26 }
  27
  28 static int bochs_load(struct drm_device *dev)
  29 {
  30         struct bochs_device *bochs;
  31         int ret;
  32
  33         bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
  34         if (bochs == NULL)
  35                 return -ENOMEM;
  36         dev->dev_private = bochs;
  37         bochs->dev = dev;
  38
  39         ret = bochs_hw_init(dev);
  40         if (ret)
  41                 goto err;
  42
  43         ret = bochs_mm_init(bochs);
  44         if (ret)
  45                 goto err;
  46
  47         ret = bochs_kms_init(bochs);
  48         if (ret)
  49                 goto err;
  50
  51         return 0;
  52
  53 err:
  54         bochs_unload(dev);
  55         return ret;
  56 }
  57
  58 DEFINE_DRM_GEM_FOPS(bochs_fops);
  59
  60 static const struct drm_driver bochs_driver = {
  61         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
  62         .fops                   = &bochs_fops,
  63         .name                   = "bochs-drm",
  64         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  65         .date                   = "20130925",
  66         .major                  = 1,
  67         .minor                  = 0,
  68         DRM_GEM_VRAM_DRIVER,
  69         .release                = bochs_unload,
  70 };
  71
  72 /* ---------------------------------------------------------------------- */
  73 /* pm interface                                                           */
  74
  75 #ifdef CONFIG_PM_SLEEP
  76 static int bochs_pm_suspend(struct device *dev)
  77 {
  78         struct drm_device *drm_dev = dev_get_drvdata(dev);
  79
  80         return drm_mode_config_helper_suspend(drm_dev);
  81 }
  82
  83 static int bochs_pm_resume(struct device *dev)
  84 {
  85         struct drm_device *drm_dev = dev_get_drvdata(dev);
  86
  87         return drm_mode_config_helper_resume(drm_dev);
  88 }
  89 #endif
  90
  91 static const struct dev_pm_ops bochs_pm_ops = {
  92         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
  93                                 bochs_pm_resume)
  94 };
  95
  96 /* ---------------------------------------------------------------------- */
  97 /* pci interface                                                          */
  98
  99 static int bochs_pci_probe(struct pci_dev *pdev,
 100                            const struct pci_device_id *ent)
 101 {
 102         struct drm_device *dev;
 103         unsigned long fbsize;
 104         int ret;
 105
 106         fbsize = pci_resource_len(pdev, 0);
 107         if (fbsize < 4 * 1024 * 1024) {
 108                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 109                 return -ENOMEM;
 110         }
 111
 112         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "bochsdrmfb");
 113         if (ret)
 114                 return ret;
 115
 116         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 117         if (IS_ERR(dev))
 118                 return PTR_ERR(dev);
 119
 120         ret = pci_enable_device(pdev);
 121         if (ret)
 122                 goto err_free_dev;
 123
 124         dev->pdev = pdev;
 125         pci_set_drvdata(pdev, dev);
 126
 127         ret = bochs_load(dev);
 128         if (ret)
 129                 goto err_free_dev;
 130
 131         ret = drm_dev_register(dev, 0);
 132         if (ret)
 133                 goto err_unload;
 134
 135         drm_fbdev_generic_setup(dev, 32);
 136         return ret;
 137
 138 err_unload:
 139         bochs_unload(dev);
 140 err_free_dev:
 141         drm_dev_put(dev);
 142         return ret;
 143 }
 144
 145 static void bochs_pci_remove(struct pci_dev *pdev)
 146 {
 147         struct drm_device *dev = pci_get_drvdata(pdev);
 148
 149         drm_dev_unplug(dev);
 150         drm_atomic_helper_shutdown(dev);
 151         bochs_hw_fini(dev);
 152         drm_dev_put(dev);
 153 }
 154
 155 static const struct pci_device_id bochs_pci_tbl[] = {
 156         {
 157                 .vendor      = 0x1234,
 158                 .device      = 0x1111,
 159                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 160                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 161                 .driver_data = BOCHS_QEMU_STDVGA,
 162         },
 163         {
 164                 .vendor      = 0x1234,
 165                 .device      = 0x1111,
 166                 .subvendor   = PCI_ANY_ID,
 167                 .subdevice   = PCI_ANY_ID,
 168                 .driver_data = BOCHS_UNKNOWN,
 169         },
 170         { /* end of list */ }
 171 };
 172
 173 static struct pci_driver bochs_pci_driver = {
 174         .name =         "bochs-drm",
 175         .id_table =     bochs_pci_tbl,
 176         .probe =        bochs_pci_probe,
 177         .remove =       bochs_pci_remove,
 178         .driver.pm =    &bochs_pm_ops,
 179 };
 180
 181 /* ---------------------------------------------------------------------- */
 182 /* module init/exit                                                       */
 183
 184 static int __init bochs_init(void)
 185 {
 186         if (vgacon_text_force() && bochs_modeset == -1)
 187                 return -EINVAL;
 188
 189         if (bochs_modeset == 0)
 190                 return -EINVAL;
 191
 192         return pci_register_driver(&bochs_pci_driver);
 193 }
 194
 195 static void __exit bochs_exit(void)
 196 {
 197         pci_unregister_driver(&bochs_pci_driver);
 198 }
 199
 200 module_init(bochs_init);
 201 module_exit(bochs_exit);
 202
 203 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 204 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 205 MODULE_LICENSE("GPL");