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 #include <drm/drm_crtc_helper.h>
  15
  16 #include "cirrus_drv.h"
  17
  18 int cirrus_modeset = -1;
  19 int cirrus_bpp = 24;
  20
  21 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
  22 module_param_named(modeset, cirrus_modeset, int, 0400);
  23 MODULE_PARM_DESC(bpp, "Max bits-per-pixel (default:24)");
  24 module_param_named(bpp, cirrus_bpp, int, 0400);
  25
  26 /*
  27  * This is the generic driver code. This binds the driver to the drm core,
  28  * which then performs further device association and calls our graphics init
  29  * functions
  30  */
  31
  32 static struct drm_driver driver;
  33
  34 /* only bind to the cirrus chip in qemu */
  35 static const struct pci_device_id pciidlist[] = {
  36         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446,
  37           PCI_SUBVENDOR_ID_REDHAT_QUMRANET, PCI_SUBDEVICE_ID_QEMU,
  38           0, 0, 0 },
  39         { PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_5446, PCI_VENDOR_ID_XEN,
  40           0x0001, 0, 0, 0 },
  41         {0,}
  42 };
  43
  44
  45 static int cirrus_kick_out_firmware_fb(struct pci_dev *pdev)
  46 {
  47         struct apertures_struct *ap;
  48         bool primary = false;
  49
  50         ap = alloc_apertures(1);
  51         if (!ap)
  52                 return -ENOMEM;
  53
  54         ap->ranges[0].base = pci_resource_start(pdev, 0);
  55         ap->ranges[0].size = pci_resource_len(pdev, 0);
  56
  57 #ifdef CONFIG_X86
  58         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
  59 #endif
  60         drm_fb_helper_remove_conflicting_framebuffers(ap, "cirrusdrmfb", primary);
  61         kfree(ap);
  62
  63         return 0;
  64 }
  65
  66 static int cirrus_pci_probe(struct pci_dev *pdev,
  67                             const struct pci_device_id *ent)
  68 {
  69         int ret;
  70
  71         ret = cirrus_kick_out_firmware_fb(pdev);
  72         if (ret)
  73                 return ret;
  74
  75         return drm_get_pci_dev(pdev, ent, &driver);
  76 }
  77
  78 static void cirrus_pci_remove(struct pci_dev *pdev)
  79 {
  80         struct drm_device *dev = pci_get_drvdata(pdev);
  81
  82         drm_put_dev(dev);
  83 }
  84
  85 #ifdef CONFIG_PM_SLEEP
  86 static int cirrus_pm_suspend(struct device *dev)
  87 {
  88         struct pci_dev *pdev = to_pci_dev(dev);
  89         struct drm_device *drm_dev = pci_get_drvdata(pdev);
  90         struct cirrus_device *cdev = drm_dev->dev_private;
  91
  92         drm_kms_helper_poll_disable(drm_dev);
  93
  94         if (cdev->mode_info.gfbdev) {
  95                 console_lock();
  96                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 1);
  97                 console_unlock();
  98         }
  99
 100         return 0;
 101 }
 102
 103 static int cirrus_pm_resume(struct device *dev)
 104 {
 105         struct pci_dev *pdev = to_pci_dev(dev);
 106         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 107         struct cirrus_device *cdev = drm_dev->dev_private;
 108
 109         drm_helper_resume_force_mode(drm_dev);
 110
 111         if (cdev->mode_info.gfbdev) {
 112                 console_lock();
 113                 drm_fb_helper_set_suspend(&cdev->mode_info.gfbdev->helper, 0);
 114                 console_unlock();
 115         }
 116
 117         drm_kms_helper_poll_enable(drm_dev);
 118         return 0;
 119 }
 120 #endif
 121
 122 static const struct file_operations cirrus_driver_fops = {
 123         .owner = THIS_MODULE,
 124         .open = drm_open,
 125         .release = drm_release,
 126         .unlocked_ioctl = drm_ioctl,
 127         .mmap = cirrus_mmap,
 128         .poll = drm_poll,
 129 #ifdef CONFIG_COMPAT
 130         .compat_ioctl = drm_compat_ioctl,
 131 #endif
 132 };
 133 static struct drm_driver driver = {
 134         .driver_features = DRIVER_MODESET | DRIVER_GEM,
 135         .load = cirrus_driver_load,
 136         .unload = cirrus_driver_unload,
 137         .set_busid = drm_pci_set_busid,
 138         .fops = &cirrus_driver_fops,
 139         .name = DRIVER_NAME,
 140         .desc = DRIVER_DESC,
 141         .date = DRIVER_DATE,
 142         .major = DRIVER_MAJOR,
 143         .minor = DRIVER_MINOR,
 144         .patchlevel = DRIVER_PATCHLEVEL,
 145         .gem_free_object_unlocked = cirrus_gem_free_object,
 146         .dumb_create = cirrus_dumb_create,
 147         .dumb_map_offset = cirrus_dumb_mmap_offset,
 148         .dumb_destroy = drm_gem_dumb_destroy,
 149 };
 150
 151 static const struct dev_pm_ops cirrus_pm_ops = {
 152         SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
 153                                 cirrus_pm_resume)
 154 };
 155
 156 static struct pci_driver cirrus_pci_driver = {
 157         .name = DRIVER_NAME,
 158         .id_table = pciidlist,
 159         .probe = cirrus_pci_probe,
 160         .remove = cirrus_pci_remove,
 161         .driver.pm = &cirrus_pm_ops,
 162 };
 163
 164 static int __init cirrus_init(void)
 165 {
 166         if (vgacon_text_force() && cirrus_modeset == -1)
 167                 return -EINVAL;
 168
 169         if (cirrus_modeset == 0)
 170                 return -EINVAL;
 171         return drm_pci_init(&driver, &cirrus_pci_driver);
 172 }
 173
 174 static void __exit cirrus_exit(void)
 175 {
 176         drm_pci_exit(&driver, &cirrus_pci_driver);
 177 }
 178
 179 module_init(cirrus_init);
 180 module_exit(cirrus_exit);
 181
 182 MODULE_DEVICE_TABLE(pci, pciidlist);
 183 MODULE_AUTHOR(DRIVER_AUTHOR);
 184 MODULE_DESCRIPTION(DRIVER_DESC);
 185 MODULE_LICENSE("GPL");