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 #include <drm/drm_fb_helper.h>
  12 #include <drm/drm_probe_helper.h>
  13
  14 #include "bochs.h"
  15
  16 static int bochs_modeset = -1;
  17 module_param_named(modeset, bochs_modeset, int, 0444);
  18 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  19
  20 /* ---------------------------------------------------------------------- */
  21 /* drm interface                                                          */
  22
  23 static void bochs_unload(struct drm_device *dev)
  24 {
  25         struct bochs_device *bochs = dev->dev_private;
  26
  27         bochs_kms_fini(bochs);
  28         bochs_mm_fini(bochs);
  29         bochs_hw_fini(dev);
  30         kfree(bochs);
  31         dev->dev_private = NULL;
  32 }
  33
  34 static int bochs_load(struct drm_device *dev)
  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);
  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         return 0;
  58
  59 err:
  60         bochs_unload(dev);
  61         return ret;
  62 }
  63
  64 static const struct file_operations bochs_fops = {
  65         .owner          = THIS_MODULE,
  66         .open           = drm_open,
  67         .release        = drm_release,
  68         .unlocked_ioctl = drm_ioctl,
  69         .compat_ioctl   = drm_compat_ioctl,
  70         .poll           = drm_poll,
  71         .read           = drm_read,
  72         .llseek         = no_llseek,
  73         .mmap           = bochs_mmap,
  74 };
  75
  76 static struct drm_driver bochs_driver = {
  77         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
  78                                   DRIVER_PRIME,
  79         .fops                   = &bochs_fops,
  80         .name                   = "bochs-drm",
  81         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  82         .date                   = "20130925",
  83         .major                  = 1,
  84         .minor                  = 0,
  85         .gem_free_object_unlocked = bochs_gem_free_object,
  86         .dumb_create            = bochs_dumb_create,
  87         .dumb_map_offset        = bochs_dumb_mmap_offset,
  88
  89         .gem_prime_export = drm_gem_prime_export,
  90         .gem_prime_import = drm_gem_prime_import,
  91         .gem_prime_pin = bochs_gem_prime_pin,
  92         .gem_prime_unpin = bochs_gem_prime_unpin,
  93         .gem_prime_vmap = bochs_gem_prime_vmap,
  94         .gem_prime_vunmap = bochs_gem_prime_vunmap,
  95         .gem_prime_mmap = bochs_gem_prime_mmap,
  96 };
  97
  98 /* ---------------------------------------------------------------------- */
  99 /* pm interface                                                           */
 100
 101 #ifdef CONFIG_PM_SLEEP
 102 static int bochs_pm_suspend(struct device *dev)
 103 {
 104         struct pci_dev *pdev = to_pci_dev(dev);
 105         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 106
 107         return drm_mode_config_helper_suspend(drm_dev);
 108 }
 109
 110 static int bochs_pm_resume(struct device *dev)
 111 {
 112         struct pci_dev *pdev = to_pci_dev(dev);
 113         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 114
 115         return drm_mode_config_helper_resume(drm_dev);
 116 }
 117 #endif
 118
 119 static const struct dev_pm_ops bochs_pm_ops = {
 120         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 121                                 bochs_pm_resume)
 122 };
 123
 124 /* ---------------------------------------------------------------------- */
 125 /* pci interface                                                          */
 126
 127 static int bochs_pci_probe(struct pci_dev *pdev,
 128                            const struct pci_device_id *ent)
 129 {
 130         struct drm_device *dev;
 131         unsigned long fbsize;
 132         int ret;
 133
 134         fbsize = pci_resource_len(pdev, 0);
 135         if (fbsize < 4 * 1024 * 1024) {
 136                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 137                 return -ENOMEM;
 138         }
 139
 140         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "bochsdrmfb");
 141         if (ret)
 142                 return ret;
 143
 144         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 145         if (IS_ERR(dev))
 146                 return PTR_ERR(dev);
 147
 148         dev->pdev = pdev;
 149         pci_set_drvdata(pdev, dev);
 150
 151         ret = bochs_load(dev);
 152         if (ret)
 153                 goto err_free_dev;
 154
 155         ret = drm_dev_register(dev, 0);
 156         if (ret)
 157                 goto err_unload;
 158
 159         drm_fbdev_generic_setup(dev, 32);
 160         return ret;
 161
 162 err_unload:
 163         bochs_unload(dev);
 164 err_free_dev:
 165         drm_dev_put(dev);
 166         return ret;
 167 }
 168
 169 static void bochs_pci_remove(struct pci_dev *pdev)
 170 {
 171         struct drm_device *dev = pci_get_drvdata(pdev);
 172
 173         drm_dev_unregister(dev);
 174         bochs_unload(dev);
 175         drm_dev_put(dev);
 176 }
 177
 178 static const struct pci_device_id bochs_pci_tbl[] = {
 179         {
 180                 .vendor      = 0x1234,
 181                 .device      = 0x1111,
 182                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 183                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 184                 .driver_data = BOCHS_QEMU_STDVGA,
 185         },
 186         {
 187                 .vendor      = 0x1234,
 188                 .device      = 0x1111,
 189                 .subvendor   = PCI_ANY_ID,
 190                 .subdevice   = PCI_ANY_ID,
 191                 .driver_data = BOCHS_UNKNOWN,
 192         },
 193         { /* end of list */ }
 194 };
 195
 196 static struct pci_driver bochs_pci_driver = {
 197         .name =         "bochs-drm",
 198         .id_table =     bochs_pci_tbl,
 199         .probe =        bochs_pci_probe,
 200         .remove =       bochs_pci_remove,
 201         .driver.pm =    &bochs_pm_ops,
 202 };
 203
 204 /* ---------------------------------------------------------------------- */
 205 /* module init/exit                                                       */
 206
 207 static int __init bochs_init(void)
 208 {
 209         if (vgacon_text_force() && bochs_modeset == -1)
 210                 return -EINVAL;
 211
 212         if (bochs_modeset == 0)
 213                 return -EINVAL;
 214
 215         return pci_register_driver(&bochs_pci_driver);
 216 }
 217
 218 static void __exit bochs_exit(void)
 219 {
 220         pci_unregister_driver(&bochs_pci_driver);
 221 }
 222
 223 module_init(bochs_init);
 224 module_exit(bochs_exit);
 225
 226 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 227 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 228 MODULE_LICENSE("GPL");