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
  13 #include "bochs.h"
  14
  15 static int bochs_modeset = -1;
  16 module_param_named(modeset, bochs_modeset, int, 0444);
  17 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  18
  19 static bool enable_fbdev = true;
  20 module_param_named(fbdev, enable_fbdev, bool, 0444);
  21 MODULE_PARM_DESC(fbdev, "register fbdev device");
  22
  23 /* ---------------------------------------------------------------------- */
  24 /* drm interface                                                          */
  25
  26 static void bochs_unload(struct drm_device *dev)
  27 {
  28         struct bochs_device *bochs = dev->dev_private;
  29
  30         bochs_fbdev_fini(bochs);
  31         bochs_kms_fini(bochs);
  32         bochs_mm_fini(bochs);
  33         bochs_hw_fini(dev);
  34         kfree(bochs);
  35         dev->dev_private = NULL;
  36 }
  37
  38 static int bochs_load(struct drm_device *dev)
  39 {
  40         struct bochs_device *bochs;
  41         int ret;
  42
  43         bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
  44         if (bochs == NULL)
  45                 return -ENOMEM;
  46         dev->dev_private = bochs;
  47         bochs->dev = dev;
  48
  49         ret = bochs_hw_init(dev);
  50         if (ret)
  51                 goto err;
  52
  53         ret = bochs_mm_init(bochs);
  54         if (ret)
  55                 goto err;
  56
  57         ret = bochs_kms_init(bochs);
  58         if (ret)
  59                 goto err;
  60
  61         if (enable_fbdev)
  62                 bochs_fbdev_init(bochs);
  63
  64         return 0;
  65
  66 err:
  67         bochs_unload(dev);
  68         return ret;
  69 }
  70
  71 static const struct file_operations bochs_fops = {
  72         .owner          = THIS_MODULE,
  73         .open           = drm_open,
  74         .release        = drm_release,
  75         .unlocked_ioctl = drm_ioctl,
  76         .compat_ioctl   = drm_compat_ioctl,
  77         .poll           = drm_poll,
  78         .read           = drm_read,
  79         .llseek         = no_llseek,
  80         .mmap           = bochs_mmap,
  81 };
  82
  83 static struct drm_driver bochs_driver = {
  84         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
  85         .fops                   = &bochs_fops,
  86         .name                   = "bochs-drm",
  87         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  88         .date                   = "20130925",
  89         .major                  = 1,
  90         .minor                  = 0,
  91         .gem_free_object_unlocked = bochs_gem_free_object,
  92         .dumb_create            = bochs_dumb_create,
  93         .dumb_map_offset        = bochs_dumb_mmap_offset,
  94 };
  95
  96 /* ---------------------------------------------------------------------- */
  97 /* pm interface                                                           */
  98
  99 #ifdef CONFIG_PM_SLEEP
 100 static int bochs_pm_suspend(struct device *dev)
 101 {
 102         struct pci_dev *pdev = to_pci_dev(dev);
 103         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 104         struct bochs_device *bochs = drm_dev->dev_private;
 105
 106         drm_kms_helper_poll_disable(drm_dev);
 107
 108         drm_fb_helper_set_suspend_unlocked(&bochs->fb.helper, 1);
 109
 110         return 0;
 111 }
 112
 113 static int bochs_pm_resume(struct device *dev)
 114 {
 115         struct pci_dev *pdev = to_pci_dev(dev);
 116         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 117         struct bochs_device *bochs = drm_dev->dev_private;
 118
 119         drm_helper_resume_force_mode(drm_dev);
 120
 121         drm_fb_helper_set_suspend_unlocked(&bochs->fb.helper, 0);
 122
 123         drm_kms_helper_poll_enable(drm_dev);
 124         return 0;
 125 }
 126 #endif
 127
 128 static const struct dev_pm_ops bochs_pm_ops = {
 129         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 130                                 bochs_pm_resume)
 131 };
 132
 133 /* ---------------------------------------------------------------------- */
 134 /* pci interface                                                          */
 135
 136 static int bochs_pci_probe(struct pci_dev *pdev,
 137                            const struct pci_device_id *ent)
 138 {
 139         struct drm_device *dev;
 140         unsigned long fbsize;
 141         int ret;
 142
 143         fbsize = pci_resource_len(pdev, 0);
 144         if (fbsize < 4 * 1024 * 1024) {
 145                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 146                 return -ENOMEM;
 147         }
 148
 149         ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, 0, "bochsdrmfb");
 150         if (ret)
 151                 return ret;
 152
 153         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 154         if (IS_ERR(dev))
 155                 return PTR_ERR(dev);
 156
 157         ret = pci_enable_device(pdev);
 158         if (ret)
 159                 goto err_free_dev;
 160
 161         dev->pdev = pdev;
 162         pci_set_drvdata(pdev, dev);
 163
 164         ret = bochs_load(dev);
 165         if (ret)
 166                 goto err_free_dev;
 167
 168         ret = drm_dev_register(dev, 0);
 169         if (ret)
 170                 goto err_unload;
 171
 172         return ret;
 173
 174 err_unload:
 175         bochs_unload(dev);
 176 err_free_dev:
 177         drm_dev_put(dev);
 178         return ret;
 179 }
 180
 181 static void bochs_pci_remove(struct pci_dev *pdev)
 182 {
 183         struct drm_device *dev = pci_get_drvdata(pdev);
 184
 185         drm_dev_unregister(dev);
 186         bochs_unload(dev);
 187         drm_dev_put(dev);
 188 }
 189
 190 static const struct pci_device_id bochs_pci_tbl[] = {
 191         {
 192                 .vendor      = 0x1234,
 193                 .device      = 0x1111,
 194                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 195                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 196                 .driver_data = BOCHS_QEMU_STDVGA,
 197         },
 198         {
 199                 .vendor      = 0x1234,
 200                 .device      = 0x1111,
 201                 .subvendor   = PCI_ANY_ID,
 202                 .subdevice   = PCI_ANY_ID,
 203                 .driver_data = BOCHS_UNKNOWN,
 204         },
 205         { /* end of list */ }
 206 };
 207
 208 static struct pci_driver bochs_pci_driver = {
 209         .name =         "bochs-drm",
 210         .id_table =     bochs_pci_tbl,
 211         .probe =        bochs_pci_probe,
 212         .remove =       bochs_pci_remove,
 213         .driver.pm =    &bochs_pm_ops,
 214 };
 215
 216 /* ---------------------------------------------------------------------- */
 217 /* module init/exit                                                       */
 218
 219 static int __init bochs_init(void)
 220 {
 221         if (vgacon_text_force() && bochs_modeset == -1)
 222                 return -EINVAL;
 223
 224         if (bochs_modeset == 0)
 225                 return -EINVAL;
 226
 227         return pci_register_driver(&bochs_pci_driver);
 228 }
 229
 230 static void __exit bochs_exit(void)
 231 {
 232         pci_unregister_driver(&bochs_pci_driver);
 233 }
 234
 235 module_init(bochs_init);
 236 module_exit(bochs_exit);
 237
 238 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 239 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 240 MODULE_LICENSE("GPL");