drivers/gpu/drm/cirrus/cirrus_drv.c

   1 /*
   2  * Copyright 2012 Red Hat <mjg@redhat.com>
   3  *
   4  * This file is subject to the terms and conditions of the GNU General
   5  * Public License version 2. See the file COPYING in the main
   6  * directory of this archive for more details.
   7  *
   8  * Authors: Matthew Garrett
   9  *          Dave Airlie
  10  */
  11 #include <linux/module.h>
  12 #include <linux/console.h>
  13 #include "drmP.h"
  14 #include "drm.h"
  15
  16 #include "cirrus_drv.h"
  17
  18 int cirrus_modeset = -1;
  19
  20 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  21 module_param_named(modeset, cirrus_modeset, int, 0400);
  22
  23 /*
  24  * This is the generic driver code. This binds the driver to the drm core,
  25  * which then performs further device association and calls our graphics init
  26  * functions
  27  */
  28
  29 static struct drm_driver driver;
  30
  31 /* only bind to the cirrus chip in qemu */
  32 static DEFINE_PCI_DEVICE_TABLE(pciidlist) = {
  33         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  34           0, 0 },
  35         {0,}
  36 };
  37
  38
  39 static void cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  40 {
  41         struct apertures_struct *ap;
  42         bool primary = false;
  43
  44         ap = alloc_apertures(1);
  45         ap->ranges[0].base = pci_resource_start(pdev, 0);
  46         ap->ranges[0].size = pci_resource_len(pdev, 0);
  47
  48 #ifdef CONFIG_X86
  49         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  50 #endif
  51         remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  52         kfree(ap);
  53 }
  54
  55 static int __devinit
  56 cirrus_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  57 {
  58         cirrus_kick_out_firmware_fb(pdev);
  59
  60         return drm_get_pci_dev(pdev, ent, &driver);
  61 }
  62
  63 static void cirrus_pci_remove(struct pci_dev *pdev)
  64 {
  65         struct drm_device *dev = pci_get_drvdata(pdev);
  66
  67         drm_put_dev(dev);
  68 }
  69
  70 static const struct file_operations cirrus_driver_fops = {
  71         .owner = THIS_MODULE,
  72         .open = drm_open,
  73         .release = drm_release,
  74         .unlocked_ioctl = drm_ioctl,
  75         .mmap = cirrus_mmap,
  76         .poll = drm_poll,
  77         .fasync = drm_fasync,
  78 };
  79 static struct drm_driver driver = {
  80         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_USE_MTRR,
  81         .load = cirrus_driver_load,
  82         .unload = cirrus_driver_unload,
  83         .fops = &cirrus_driver_fops,
  84         .name = DRIVER_NAME,
  85         .desc = DRIVER_DESC,
  86         .date = DRIVER_DATE,
  87         .major = DRIVER_MAJOR,
  88         .minor = DRIVER_MINOR,
  89         .patchlevel = DRIVER_PATCHLEVEL,
  90         .gem_init_object = cirrus_gem_init_object,
  91         .gem_free_object = cirrus_gem_free_object,
  92         .dumb_create = cirrus_dumb_create,
  93         .dumb_map_offset = cirrus_dumb_mmap_offset,
  94         .dumb_destroy = cirrus_dumb_destroy,
  95 };
  96
  97 static struct pci_driver cirrus_pci_driver = {
  98         .name = DRIVER_NAME,
  99         .id_table = pciidlist,
 100         .probe = cirrus_pci_probe,
 101         .remove = cirrus_pci_remove,
 102 };
 103
 104 static int __init cirrus_init(void)
 105 {
 106 #ifdef CONFIG_VGA_CONSOLE
 107         if (vgacon_text_force() && cirrus_modeset == -1)
 108                 return -EINVAL;
 109 #endif
 110
 111         if (cirrus_modeset == 0)
 112                 return -EINVAL;
 113         return drm_pci_init(&driver, &cirrus_pci_driver);
 114 }
 115
 116 static void __exit cirrus_exit(void)
 117 {
 118         drm_pci_exit(&driver, &cirrus_pci_driver);
 119 }
 120
 121 module_init(cirrus_init);
 122 module_exit(cirrus_exit);
 123
 124 MODULE_DEVICE_TABLE(pci, pciidlist);
 125 MODULE_AUTHOR(DRIVER_AUTHOR);
 126 MODULE_DESCRIPTION(DRIVER_DESC);
 127 MODULE_LICENSE("GPL");