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
30int 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
40static 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
60int 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
92err_free:
93	drm_dev_unref(dev);
94	return ret;
95}
96