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
28 #include "virtgpu_drv.h"
29
drm_virtio_set_busid(struct drm_device * dev,struct drm_master * master)30 int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master)
31 {
32 struct pci_dev *pdev = dev->pdev;
33
34 if (pdev) {
35 return drm_pci_set_busid(dev, master);
36 }
37 return 0;
38 }
39
virtio_pci_kick_out_firmware_fb(struct pci_dev * pci_dev)40 static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
41 {
42 struct apertures_struct *ap;
43 bool primary;
44
45 ap = alloc_apertures(1);
46 if (!ap)
47 return;
48
49 ap->ranges[0].base = pci_resource_start(pci_dev, 0);
50 ap->ranges[0].size = pci_resource_len(pci_dev, 0);
51
52 primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
53 & IORESOURCE_ROM_SHADOW;
54
55 remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
56
57 kfree(ap);
58 }
59
drm_virtio_init(struct drm_driver * driver,struct virtio_device * vdev)60 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
61 {
62 struct drm_device *dev;
63 int ret;
64
65 dev = drm_dev_alloc(driver, &vdev->dev);
66 if (!dev)
67 return -ENOMEM;
68 dev->virtdev = vdev;
69 vdev->priv = dev;
70
71 if (strcmp(vdev->dev.parent->bus->name, "pci") == 0) {
72 struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
73 bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
74
75 DRM_INFO("pci: %s detected\n",
76 vga ? "virtio-vga" : "virtio-gpu-pci");
77 dev->pdev = pdev;
78 if (vga)
79 virtio_pci_kick_out_firmware_fb(pdev);
80 }
81
82 ret = drm_dev_register(dev, 0);
83 if (ret)
84 goto err_free;
85
86 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
87 driver->major, driver->minor, driver->patchlevel,
88 driver->date, dev->primary->index);
89
90 return 0;
91
92 err_free:
93 drm_dev_unref(dev);
94 return ret;
95 }
96