1/*
2 * Copyright 2003 José Fonseca.
3 * Copyright 2003 Leif Delgass.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#include <linux/dma-mapping.h>
26#include <linux/list.h>
27#include <linux/mutex.h>
28#include <linux/pci.h>
29#include <linux/slab.h>
30
31#include <drm/drm_auth.h>
32#include <drm/drm.h>
33#include <drm/drm_drv.h>
34#include <drm/drm_print.h>
35
36#include "drm_internal.h"
37
38static int drm_get_pci_domain(struct drm_device *dev)
39{
40#ifndef __alpha__
41 /* For historical reasons, drm_get_pci_domain() is busticated
42 * on most archs and has to remain so for userspace interface
43 * < 1.4, except on alpha which was right from the beginning
44 */
45 if (dev->if_version < 0x10004)
46 return 0;
47#endif /* __alpha__ */
48
49 return pci_domain_nr(to_pci_dev(dev->dev)->bus);
50}
51
52int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
53{
54 struct pci_dev *pdev = to_pci_dev(dev->dev);
55
56 master->unique = kasprintf(GFP_KERNEL, fmt: "pci:%04x:%02x:%02x.%d",
57 drm_get_pci_domain(dev),
58 pdev->bus->number,
59 PCI_SLOT(pdev->devfn),
60 PCI_FUNC(pdev->devfn));
61 if (!master->unique)
62 return -ENOMEM;
63
64 master->unique_len = strlen(master->unique);
65 return 0;
66}
67

source code of linux/drivers/gpu/drm/drm_pci.c