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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 a7 * copy of this software and associated documentation files (the "Software"),8 * to deal in the Software without restriction, including without limitation9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,10 * and/or sell copies of the Software, and to permit persons to whom the11 * Software is furnished to do so, subject to the following conditions:12 *13 * The above copyright notice and this permission notice (including the next14 * paragraph) shall be included in all copies or substantial portions of the15 * Software.16 *17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE20 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.23 */24 25#include <linux/dma-mapping.h>26#include <linux/export.h>27#include <linux/list.h>28#include <linux/mutex.h>29#include <linux/pci.h>30#include <linux/slab.h>31 32#include <drm/drm_auth.h>33#include <drm/drm.h>34#include <drm/drm_drv.h>35#include <drm/drm_print.h>36 37#include "drm_internal.h"38 39static int drm_get_pci_domain(struct drm_device *dev)40{41#ifndef __alpha__42 /* For historical reasons, drm_get_pci_domain() is busticated43 * on most archs and has to remain so for userspace interface44 * < 1.4, except on alpha which was right from the beginning45 */46 if (dev->if_version < 0x10004)47 return 0;48#endif /* __alpha__ */49 50 return pci_domain_nr(to_pci_dev(dev->dev)->bus);51}52 53int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)54{55 struct pci_dev *pdev = to_pci_dev(dev->dev);56 57 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",58 drm_get_pci_domain(dev),59 pdev->bus->number,60 PCI_SLOT(pdev->devfn),61 PCI_FUNC(pdev->devfn));62 if (!master->unique)63 return -ENOMEM;64 65 master->unique_len = strlen(master->unique);66 return 0;67}68