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 bool enable_fbdev = true;
  16 module_param_named(fbdev, enable_fbdev, bool, 0444);
  17 MODULE_PARM_DESC(fbdev, "register fbdev device");
  18
  19 /* ---------------------------------------------------------------------- */
  20 /* drm interface                                                          */
  21
  22 static void bochs_unload(struct drm_device *dev)
  23 {
  24         struct bochs_device *bochs = dev->dev_private;
  25
  26         bochs_fbdev_fini(bochs);
  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, 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         .compat_ioctl   = drm_compat_ioctl,
  73         .poll           = drm_poll,
  74         .read           = drm_read,
  75         .llseek         = no_llseek,
  76         .mmap           = bochs_mmap,
  77 };
  78
  79 static struct drm_driver bochs_driver = {
  80         .driver_features        = DRIVER_GEM | DRIVER_MODESET,
  81         .load                   = bochs_load,
  82         .unload                 = bochs_unload,
  83         .set_busid              = drm_pci_set_busid,
  84         .fops                   = &bochs_fops,
  85         .name                   = "bochs-drm",
  86         .desc                   = "bochs dispi vga interface (qemu stdvga)",
  87         .date                   = "20130925",
  88         .major                  = 1,
  89         .minor                  = 0,
  90         .gem_free_object_unlocked = bochs_gem_free_object,
  91         .dumb_create            = bochs_dumb_create,
  92         .dumb_map_offset        = bochs_dumb_mmap_offset,
  93         .dumb_destroy           = drm_gem_dumb_destroy,
  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         if (bochs->fb.initialized) {
 109                 console_lock();
 110                 drm_fb_helper_set_suspend(&bochs->fb.helper, 1);
 111                 console_unlock();
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int bochs_pm_resume(struct device *dev)
 118 {
 119         struct pci_dev *pdev = to_pci_dev(dev);
 120         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 121         struct bochs_device *bochs = drm_dev->dev_private;
 122
 123         drm_helper_resume_force_mode(drm_dev);
 124
 125         if (bochs->fb.initialized) {
 126                 console_lock();
 127                 drm_fb_helper_set_suspend(&bochs->fb.helper, 0);
 128                 console_unlock();
 129         }
 130
 131         drm_kms_helper_poll_enable(drm_dev);
 132         return 0;
 133 }
 134 #endif
 135
 136 static const struct dev_pm_ops bochs_pm_ops = {
 137         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 138                                 bochs_pm_resume)
 139 };
 140
 141 /* ---------------------------------------------------------------------- */
 142 /* pci interface                                                          */
 143
 144 static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
 145 {
 146         struct apertures_struct *ap;
 147
 148         ap = alloc_apertures(1);
 149         if (!ap)
 150                 return -ENOMEM;
 151
 152         ap->ranges[0].base = pci_resource_start(pdev, 0);
 153         ap->ranges[0].size = pci_resource_len(pdev, 0);
 154         drm_fb_helper_remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
 155         kfree(ap);
 156
 157         return 0;
 158 }
 159
 160 static int bochs_pci_probe(struct pci_dev *pdev,
 161                            const struct pci_device_id *ent)
 162 {
 163         unsigned long fbsize;
 164         int ret;
 165
 166         fbsize = pci_resource_len(pdev, 0);
 167         if (fbsize < 4 * 1024 * 1024) {
 168                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 169                 return -ENOMEM;
 170         }
 171
 172         ret = bochs_kick_out_firmware_fb(pdev);
 173         if (ret)
 174                 return ret;
 175
 176         return drm_get_pci_dev(pdev, ent, &bochs_driver);
 177 }
 178
 179 static void bochs_pci_remove(struct pci_dev *pdev)
 180 {
 181         struct drm_device *dev = pci_get_drvdata(pdev);
 182
 183         drm_put_dev(dev);
 184 }
 185
 186 static const struct pci_device_id bochs_pci_tbl[] = {
 187         {
 188                 .vendor      = 0x1234,
 189                 .device      = 0x1111,
 190                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 191                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 192                 .driver_data = BOCHS_QEMU_STDVGA,
 193         },
 194         {
 195                 .vendor      = 0x1234,
 196                 .device      = 0x1111,
 197                 .subvendor   = PCI_ANY_ID,
 198                 .subdevice   = PCI_ANY_ID,
 199                 .driver_data = BOCHS_UNKNOWN,
 200         },
 201         { /* end of list */ }
 202 };
 203
 204 static struct pci_driver bochs_pci_driver = {
 205         .name =         "bochs-drm",
 206         .id_table =     bochs_pci_tbl,
 207         .probe =        bochs_pci_probe,
 208         .remove =       bochs_pci_remove,
 209         .driver.pm =    &bochs_pm_ops,
 210 };
 211
 212 /* ---------------------------------------------------------------------- */
 213 /* module init/exit                                                       */
 214
 215 static int __init bochs_init(void)
 216 {
 217         return drm_pci_init(&bochs_driver, &bochs_pci_driver);
 218 }
 219
 220 static void __exit bochs_exit(void)
 221 {
 222         drm_pci_exit(&bochs_driver, &bochs_pci_driver);
 223 }
 224
 225 module_init(bochs_init);
 226 module_exit(bochs_exit);
 227
 228 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 229 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 230 MODULE_LICENSE("GPL");