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 <drm/drmP.h>
  14
  15 #include "cirrus_drv.h"
  16
  17 int cirrus_modeset = -1;
  18
  19 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  20 module_param_named(modeset, cirrus_modeset, int, 0400);
  21
  22 /*
  23  * This is the generic driver code. This binds the driver to the drm core,
  24  * which then performs further device association and calls our graphics init
  25  * functions
  26  */
  27
  28 static struct drm_driver driver;
  29
  30 /* only bind to the cirrus chip in qemu */
  31 static DEFINE_PCI_DEVICE_TABLE(pciidlist) = {
  32         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, 0x1af4, 0x1100, 0,
  33           0, 0 },
  34         {0,}
  35 };
  36
  37
  38 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  39 {
  40         struct apertures_struct *ap;
  41         bool primary = false;
  42
  43         ap = alloc_apertures(1);
  44         if (!ap)
  45                 return -ENOMEM;
  46
  47         ap->ranges[0].base = pci_resource_start(pdev, 0);
  48         ap->ranges[0].size = pci_resource_len(pdev, 0);
  49
  50 #ifdef CONFIG_X86
  51         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  52 #endif
  53         remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  54         kfree(ap);
  55
  56         return 0;
  57 }
  58
  59 static int cirrus_pci_probe(struct pci_dev *pdev,
  60                             const struct pci_device_id *ent)
  61 {
  62         int ret;
  63
  64         ret = cirrus_kick_out_firmware_fb(pdev);
  65         if (ret)
  66                 return ret;
  67
  68         return drm_get_pci_dev(pdev, ent, &driver);
  69 }
  70
  71 static void cirrus_pci_remove(struct pci_dev *pdev)
  72 {
  73         struct drm_device *dev = pci_get_drvdata(pdev);
  74
  75         drm_put_dev(dev);
  76 }
  77
  78 static const struct file_operations cirrus_driver_fops = {
  79         .owner = THIS_MODULE,
  80         .open = drm_open,
  81         .release = drm_release,
  82         .unlocked_ioctl = drm_ioctl,
  83         .mmap = cirrus_mmap,
  84         .poll = drm_poll,
  85 #ifdef CONFIG_COMPAT
  86         .compat_ioctl = drm_compat_ioctl,
  87 #endif
  88         .fasync = drm_fasync,
  89 };
  90 static struct drm_driver driver = {
  91         .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_USE_MTRR,
  92         .load = cirrus_driver_load,
  93         .unload = cirrus_driver_unload,
  94         .fops = &cirrus_driver_fops,
  95         .name = DRIVER_NAME,
  96         .desc = DRIVER_DESC,
  97         .date = DRIVER_DATE,
  98         .major = DRIVER_MAJOR,
  99         .minor = DRIVER_MINOR,
 100         .patchlevel = DRIVER_PATCHLEVEL,
 101         .gem_init_object = cirrus_gem_init_object,
 102         .gem_free_object = cirrus_gem_free_object,
 103         .dumb_create = cirrus_dumb_create,
 104         .dumb_map_offset = cirrus_dumb_mmap_offset,
 105         .dumb_destroy = cirrus_dumb_destroy,
 106 };
 107
 108 static struct pci_driver cirrus_pci_driver = {
 109         .name = DRIVER_NAME,
 110         .id_table = pciidlist,
 111         .probe = cirrus_pci_probe,
 112         .remove = cirrus_pci_remove,
 113 };
 114
 115 static int __init cirrus_init(void)
 116 {
 117 #ifdef CONFIG_VGA_CONSOLE
 118         if (vgacon_text_force() && cirrus_modeset == -1)
 119                 return -EINVAL;
 120 #endif
 121
 122         if (cirrus_modeset == 0)
 123                 return -EINVAL;
 124         return drm_pci_init(&driver, &cirrus_pci_driver);
 125 }
 126
 127 static void __exit cirrus_exit(void)
 128 {
 129         drm_pci_exit(&driver, &cirrus_pci_driver);
 130 }
 131
 132 module_init(cirrus_init);
 133 module_exit(cirrus_exit);
 134
 135 MODULE_DEVICE_TABLE(pci, pciidlist);
 136 MODULE_AUTHOR(DRIVER_AUTHOR);
 137 MODULE_DESCRIPTION(DRIVER_DESC);
 138 MODULE_LICENSE("GPL");