Commit 9a209e0c authored by Keir Fraser's avatar Keir Fraser

sbdf2devicepath: converts SBDF into device path.

'SBDF' format is "[SEG#:]BUS#:DEV#.FUNC#"
  ex) 0000:0a:1f.3
Device path format is "HID[:UID]-DEV#.FUNC#[-DEV#.FUNC#[...]]"
  ex) PNP0A08:0-2.0-0.0

The command can be executed as follows.

# sbdf2devicepath 0a:1f.3
PNP0A08:0-2.0-0.0
Signed-off-by: default avatarYuji Shimada <shimada-yxb@necst.nec.co.jp>
parent a3ef9866
#!/usr/bin/env python
# -*- mode: python; -*-
#============================================================================
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#============================================================================
# Copyright (c) 2009, NEC Corporation.
#============================================================================
# This script converts SBDF into device path.
# 'SBDF' format is "[SEG#:]BUS#:DEV#.FUNC#"
# ex) 0000:0a:1f.3
# Device path format is "HID[:UID]-DEV#.FUNC#[-DEV#.FUNC#[...]]"
# ex) PNP0A08:0-2.0-0.0
#=============================================================================
import sys
import os
# add fallback path for non-native python path installs if needed
sys.path.append('/usr/lib/python')
sys.path.append('/usr/lib64/python')
from xen.util.pci import *
SYSFS_ACPI_DEVS_PATH = '/firmware/acpi/namespace/ACPI/_SB'
def find_hid_uid(dom, b, d, f):
obj_list = os.listdir(sb_path)
for obj in obj_list:
obj_path = sb_path + '/' + obj.strip() + '/'
if os.path.exists(obj_path + 'seg') and \
os.path.exists(obj_path + 'bbn'):
seg = open(obj_path + 'seg').read()
bbn = open(obj_path + 'bbn').read()
if int(seg) == dom and int(bbn) == b:
hid = open(obj_path + 'hid').read()
if os.path.exists(obj_path + 'uid') is False:
path_str = hid.strip()
else:
uid = open(obj_path + 'uid').read()
path_str = hid.strip() + ':' + uid.strip()
return path_str
return None
def make_device_path(dom, b, d, f):
dev = PciDevice(dom, b, d, f)
parent = dev.find_parent()
if parent is None:
path_str = find_hid_uid(dom, b, d, f)
path_str = path_str + '-' + hex(d).replace('0x', '') + '.' + \
hex(f).replace('0x', '')
return path_str
(pdom, pb, pd, pf) = parent
path_str = make_device_path(pdom, pb, pd, pf)
path_str = path_str + '-' + hex(d).replace('0x', '') + '.' + \
hex(f).replace('0x', '')
return path_str
# main
if len(sys.argv) <> 2:
print 'Usage: sbdf2devicepath SBDF\n'
else:
sb_path = find_sysfs_mnt() + SYSFS_ACPI_DEVS_PATH
if os.path.exists(sb_path):
path = os.environ['PATH']
os.environ['PATH'] = path + ':/sbin' + ':/user/sbin'
sbdf = sys.argv[1]
(dom, b, d, f) = parse_pci_name(sbdf)
path_str = make_device_path(dom, b, d, f)
print path_str
else:
print sb_path + ' not found.\n'
print 'This command is only for linux 2.6.18.8 xen kernel.\n'
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