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 38 static 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 52 int 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, "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