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
  12 #include "bochs.h"
  13
  14 static bool enable_fbdev = true;
  15 module_param_named(fbdev, enable_fbdev, bool, 0444);
  16 MODULE_PARM_DESC(fbdev, "register fbdev device");
  17
  18 /* ---------------------------------------------------------------------- */
  19 /* drm interface                                                          */
  20
  21 static int bochs_unload(struct drm_device *dev)
  22 {
  23         struct bochs_device *bochs = dev->dev_private;
  24
  25         bochs_fbdev_fini(bochs);
  26         bochs_kms_fini(bochs);
  27         bochs_mm_fini(bochs);
  28         bochs_hw_fini(dev);
  29         kfree(bochs);
  30         dev->dev_private = NULL;
  31         return 0;
  32 }
  33
  34 static int bochs_load(struct drm_device *dev, unsigned long flags)
  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, flags);
  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         if (enable_fbdev)
  58                 bochs_fbdev_init(bochs);
  59
  60         return 0;
  61
  62 err:
  63         bochs_unload(dev);
  64         return ret;
  65 }
  66
  67 static const struct file_operations bochs_fops = {
  68         .owner          = THIS_MODULE,
  69         .open           = drm_open,
  70         .release        = drm_release,
  71         .unlocked_ioctl = drm_ioctl,
  72 #ifdef CONFIG_COMPAT
  73         .compat_ioctl   = drm_compat_ioctl,
  74 #endif
  75         .poll           = drm_poll,
  76         .read           = drm_read,
  77         .llseek         = no_llseek,
  78         .mmap           = bochs_mmap,
  79 };
  80
  81 static struct drm_driver bochs_driver = {
  82         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
  83         .load                   = bochs_load,
  84         .unload                 = bochs_unload,
  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        = bochs_gem_free_object,
  92         .dumb_create            = bochs_dumb_create,
  93         .dumb_map_offset        = bochs_dumb_mmap_offset,
  94         .dumb_destroy           = drm_gem_dumb_destroy,
  95 };
  96
  97 /* ---------------------------------------------------------------------- */
  98 /* pci interface                                                          */
  99
 100 static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
 101 {
 102         struct apertures_struct *ap;
 103
 104         ap = alloc_apertures(1);
 105         if (!ap)
 106                 return -ENOMEM;
 107
 108         ap->ranges[0].base = pci_resource_start(pdev, 0);
 109         ap->ranges[0].size = pci_resource_len(pdev, 0);
 110         remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
 111         kfree(ap);
 112
 113         return 0;
 114 }
 115
 116 static int bochs_pci_probe(struct pci_dev *pdev,
 117                            const struct pci_device_id *ent)
 118 {
 119         int ret;
 120
 121         ret = bochs_kick_out_firmware_fb(pdev);
 122         if (ret)
 123                 return ret;
 124
 125         return drm_get_pci_dev(pdev, ent, &bochs_driver);
 126 }
 127
 128 static void bochs_pci_remove(struct pci_dev *pdev)
 129 {
 130         struct drm_device *dev = pci_get_drvdata(pdev);
 131
 132         drm_put_dev(dev);
 133 }
 134
 135 static DEFINE_PCI_DEVICE_TABLE(bochs_pci_tbl) = {
 136         {
 137                 .vendor      = 0x1234,
 138                 .device      = 0x1111,
 139                 .subvendor   = 0x1af4,
 140                 .subdevice   = 0x1100,
 141                 .driver_data = BOCHS_QEMU_STDVGA,
 142         },
 143         {
 144                 .vendor      = 0x1234,
 145                 .device      = 0x1111,
 146                 .subvendor   = PCI_ANY_ID,
 147                 .subdevice   = PCI_ANY_ID,
 148                 .driver_data = BOCHS_UNKNOWN,
 149         },
 150         { /* end of list */ }
 151 };
 152
 153 static struct pci_driver bochs_pci_driver = {
 154         .name =         "bochs-drm",
 155         .id_table =     bochs_pci_tbl,
 156         .probe =        bochs_pci_probe,
 157         .remove =       bochs_pci_remove,
 158 };
 159
 160 /* ---------------------------------------------------------------------- */
 161 /* module init/exit                                                       */
 162
 163 static int __init bochs_init(void)
 164 {
 165         return drm_pci_init(&bochs_driver, &bochs_pci_driver);
 166 }
 167
 168 static void __exit bochs_exit(void)
 169 {
 170         drm_pci_exit(&bochs_driver, &bochs_pci_driver);
 171 }
 172
 173 module_init(bochs_init);
 174 module_exit(bochs_exit);
 175
 176 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 177 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 178 MODULE_LICENSE("GPL");