1/* $NetBSD: drm_pci_busid.c,v 1.3 2022/07/23 08:45:03 riastradh Exp $ */ 2 3/*- 4 * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: drm_pci_busid.c,v 1.3 2022/07/23 08:45:03 riastradh Exp $"); 31 32#include <sys/types.h> 33#include <sys/device.h> 34#include <sys/errno.h> 35 36#include <lib/libkern/libkern.h> 37 38#include <dev/pci/pcivar.h> 39 40#include <linux/kernel.h> 41#include <linux/pci.h> 42 43#include <drm/drm_auth.h> 44#include <drm/drm_device.h> 45#include "../dist/drm/drm_internal.h" 46 47int 48drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) 49{ 50 const struct pci_attach_args *const pa = &dev->pdev->pd_pa; 51 52 KASSERT(dev_is_pci(dev->dev)); 53 54 master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d", 55 device_unit(device_parent(dev->dev)), 56 pa->pa_bus, pa->pa_device, pa->pa_function); 57 if (master->unique == NULL) 58 return -ENOMEM; 59 master->unique_len = strlen(master->unique); 60 61 return 0; 62} 63