1 /*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include <linux/pci.h>
27 #include <drm/drm_fb_helper.h>
28
29 #include "virtgpu_drv.h"
30
drm_virtio_set_busid(struct drm_device * dev,struct drm_master * master)31 int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master)
32 {
33 struct pci_dev *pdev = dev->pdev;
34
35 if (pdev) {
36 return drm_pci_set_busid(dev, master);
37 }
38 return 0;
39 }
40
virtio_pci_kick_out_firmware_fb(struct pci_dev * pci_dev)41 static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
42 {
43 struct apertures_struct *ap;
44 bool primary;
45
46 ap = alloc_apertures(1);
47 if (!ap)
48 return;
49
50 ap->ranges[0].base = pci_resource_start(pci_dev, 0);
51 ap->ranges[0].size = pci_resource_len(pci_dev, 0);
52
53 primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
54 & IORESOURCE_ROM_SHADOW;
55
56 drm_fb_helper_remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
57
58 kfree(ap);
59 }
60
drm_virtio_init(struct drm_driver * driver,struct virtio_device * vdev)61 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
62 {
63 struct drm_device *dev;
64 int ret;
65
66 dev = drm_dev_alloc(driver, &vdev->dev);
67 if (IS_ERR(dev))
68 return PTR_ERR(dev);
69 dev->virtdev = vdev;
70 vdev->priv = dev;
71
72 if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
73 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
74 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
75
76 DRM_INFO("pci: %s detected\n",
77 vga ? "virtio-vga" : "virtio-gpu-pci");
78 dev->pdev = pdev;
79 if (vga)
80 virtio_pci_kick_out_firmware_fb(pdev);
81 }
82
83 ret = drm_dev_register(dev, 0);
84 if (ret)
85 goto err_free;
86
87 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
88 driver->major, driver->minor, driver->patchlevel,
89 driver->date, dev->primary->index);
90
91 return 0;
92
93 err_free:
94 drm_dev_unref(dev);
95 return ret;
96 }
97