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, unsigned long flags)
  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, flags);
  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         .load                   = bochs_load,
  86         .unload                 = bochs_unload,
  87         .fops                   = &bochs_fops,
  88         .name                   = "bochs-drm",
  89         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  90         .date                   = "20130925",
  91         .major                  = 1,
  92         .minor                  = 0,
  93         .gem_free_object_unlocked = bochs_gem_free_object,
  94         .dumb_create            = bochs_dumb_create,
  95         .dumb_map_offset        = bochs_dumb_mmap_offset,
  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         struct bochs_device *bochs = drm_dev->dev_private;
 107
 108         drm_kms_helper_poll_disable(drm_dev);
 109
 110         if (bochs->fb.initialized) {
 111                 console_lock();
 112                 drm_fb_helper_set_suspend(&bochs->fb.helper, 1);
 113                 console_unlock();
 114         }
 115
 116         return 0;
 117 }
 118
 119 static int bochs_pm_resume(struct device *dev)
 120 {
 121         struct pci_dev *pdev = to_pci_dev(dev);
 122         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 123         struct bochs_device *bochs = drm_dev->dev_private;
 124
 125         drm_helper_resume_force_mode(drm_dev);
 126
 127         if (bochs->fb.initialized) {
 128                 console_lock();
 129                 drm_fb_helper_set_suspend(&bochs->fb.helper, 0);
 130                 console_unlock();
 131         }
 132
 133         drm_kms_helper_poll_enable(drm_dev);
 134         return 0;
 135 }
 136 #endif
 137
 138 static const struct dev_pm_ops bochs_pm_ops = {
 139         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 140                                 bochs_pm_resume)
 141 };
 142
 143 /* ---------------------------------------------------------------------- */
 144 /* pci interface                                                          */
 145
 146 static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
 147 {
 148         struct apertures_struct *ap;
 149
 150         ap = alloc_apertures(1);
 151         if (!ap)
 152                 return -ENOMEM;
 153
 154         ap->ranges[0].base = pci_resource_start(pdev, 0);
 155         ap->ranges[0].size = pci_resource_len(pdev, 0);
 156         drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
 157         kfree(ap);
 158
 159         return 0;
 160 }
 161
 162 static int bochs_pci_probe(struct pci_dev *pdev,
 163                            const struct pci_device_id *ent)
 164 {
 165         unsigned long fbsize;
 166         int ret;
 167
 168         fbsize = pci_resource_len(pdev, 0);
 169         if (fbsize < 4 * 1024 * 1024) {
 170                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 171                 return -ENOMEM;
 172         }
 173
 174         ret = bochs_kick_out_firmware_fb(pdev);
 175         if (ret)
 176                 return ret;
 177
 178         return drm_get_pci_dev(pdev, ent, &bochs_driver);
 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_put_dev(dev);
 186 }
 187
 188 static const struct pci_device_id bochs_pci_tbl[] = {
 189         {
 190                 .vendor      = 0x1234,
 191                 .device      = 0x1111,
 192                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 193                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 194                 .driver_data = BOCHS_QEMU_STDVGA,
 195         },
 196         {
 197                 .vendor      = 0x1234,
 198                 .device      = 0x1111,
 199                 .subvendor   = PCI_ANY_ID,
 200                 .subdevice   = PCI_ANY_ID,
 201                 .driver_data = BOCHS_UNKNOWN,
 202         },
 203         { /* end of list */ }
 204 };
 205
 206 static struct pci_driver bochs_pci_driver = {
 207         .name =         "bochs-drm",
 208         .id_table =     bochs_pci_tbl,
 209         .probe =        bochs_pci_probe,
 210         .remove =       bochs_pci_remove,
 211         .driver.pm =    &bochs_pm_ops,
 212 };
 213
 214 /* ---------------------------------------------------------------------- */
 215 /* module init/exit                                                       */
 216
 217 static int __init bochs_init(void)
 218 {
 219         if (vgacon_text_force() && bochs_modeset == -1)
 220                 return -EINVAL;
 221
 222         if (bochs_modeset == 0)
 223                 return -EINVAL;
 224
 225         return pci_register_driver(&bochs_pci_driver);
 226 }
 227
 228 static void __exit bochs_exit(void)
 229 {
 230         pci_unregister_driver(&bochs_pci_driver);
 231 }
 232
 233 module_init(bochs_init);
 234 module_exit(bochs_exit);
 235
 236 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 237 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 238 MODULE_LICENSE("GPL");