tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/usr/bin/python3
2# SPDX-License-Identifier: GPL-2.0
3#
4# Copyright (c) 2023 Collabora Ltd
5#
6# This script tests for presence and driver binding of devices from discoverable
7# buses (ie USB, PCI).
8#
9# The per-platform YAML file defining the devices to be tested is stored inside
10# the boards/ directory and chosen based on DT compatible or DMI IDs (sys_vendor
11# and product_name).
12#
13# See boards/google,spherion.yaml and boards/'Dell Inc.,XPS 13 9300.yaml' for
14# the description and examples of the file structure and vocabulary.
15#
16
17import argparse
18import glob
19import os
20import re
21import sys
22import yaml
23
24# Allow ksft module to be imported from different directory
25this_dir = os.path.dirname(os.path.realpath(__file__))
26sys.path.append(os.path.join(this_dir, "../../kselftest/"))
27
28import ksft
29
30pci_controllers = []
31usb_controllers = []
32
33sysfs_usb_devices = "/sys/bus/usb/devices/"
34
35
36def find_pci_controller_dirs():
37 sysfs_devices = "/sys/devices"
38 pci_controller_sysfs_dir = "pci[0-9a-f]{4}:[0-9a-f]{2}"
39
40 dir_regex = re.compile(pci_controller_sysfs_dir)
41 for path, dirs, _ in os.walk(sysfs_devices):
42 for d in dirs:
43 if dir_regex.match(d):
44 pci_controllers.append(os.path.join(path, d))
45
46
47def find_usb_controller_dirs():
48 usb_controller_sysfs_dir = r"usb[\d]+"
49
50 dir_regex = re.compile(usb_controller_sysfs_dir)
51 for d in os.scandir(sysfs_usb_devices):
52 if dir_regex.match(d.name):
53 usb_controllers.append(os.path.realpath(d.path))
54
55
56def get_dt_mmio(sysfs_dev_dir):
57 re_dt_mmio = re.compile("OF_FULLNAME=.*@([0-9a-f]+)")
58 dt_mmio = None
59
60 # PCI controllers' sysfs don't have an of_node, so have to read it from the
61 # parent
62 while not dt_mmio:
63 try:
64 with open(os.path.join(sysfs_dev_dir, "uevent")) as f:
65 dt_mmio = re_dt_mmio.search(f.read()).group(1)
66 return dt_mmio
67 except:
68 pass
69 sysfs_dev_dir = os.path.dirname(sysfs_dev_dir)
70
71
72def get_of_fullname(sysfs_dev_dir):
73 re_of_fullname = re.compile("OF_FULLNAME=(.*)")
74 of_full_name = None
75
76 # PCI controllers' sysfs don't have an of_node, so have to read it from the
77 # parent
78 while not of_full_name:
79 try:
80 with open(os.path.join(sysfs_dev_dir, "uevent")) as f:
81 of_fullname = re_of_fullname.search(f.read()).group(1)
82 return of_fullname
83 except:
84 pass
85 sysfs_dev_dir = os.path.dirname(sysfs_dev_dir)
86
87
88def get_acpi_uid(sysfs_dev_dir):
89 with open(os.path.join(sysfs_dev_dir, "firmware_node", "uid")) as f:
90 return f.read()
91
92
93def get_usb_version(sysfs_dev_dir):
94 re_usb_version = re.compile(r"PRODUCT=.*/(\d)/.*")
95 with open(os.path.join(sysfs_dev_dir, "uevent")) as f:
96 return int(re_usb_version.search(f.read()).group(1))
97
98
99def get_usb_busnum(sysfs_dev_dir):
100 re_busnum = re.compile("BUSNUM=(.*)")
101 with open(os.path.join(sysfs_dev_dir, "uevent")) as f:
102 return int(re_busnum.search(f.read()).group(1))
103
104
105def find_controller_in_sysfs(controller, parent_sysfs=None):
106 if controller["type"] == "pci-controller":
107 controllers = pci_controllers
108 elif controller["type"] == "usb-controller":
109 controllers = usb_controllers
110
111 result_controllers = []
112
113 for c in controllers:
114 if parent_sysfs and parent_sysfs not in c:
115 continue
116
117 if controller.get("dt-mmio"):
118 if str(controller["dt-mmio"]) != get_dt_mmio(c):
119 continue
120
121 if controller.get("of-fullname-regex"):
122 re_of_fullname = re.compile(str(controller["of-fullname-regex"]))
123 if not re_of_fullname.match(get_of_fullname(c)):
124 continue
125
126 if controller.get("usb-version"):
127 if controller["usb-version"] != get_usb_version(c):
128 continue
129
130 if controller.get("acpi-uid"):
131 if controller["acpi-uid"] != get_acpi_uid(c):
132 continue
133
134 result_controllers.append(c)
135
136 return result_controllers
137
138
139def is_controller(device):
140 return device.get("type") and "controller" in device.get("type")
141
142
143def path_to_dir(parent_sysfs, dev_type, path):
144 if dev_type == "usb-device":
145 usb_dev_sysfs_fmt = "{}-{}"
146 busnum = get_usb_busnum(parent_sysfs)
147 dirname = os.path.join(
148 sysfs_usb_devices, usb_dev_sysfs_fmt.format(busnum, path)
149 )
150 return [os.path.realpath(dirname)]
151 else:
152 pci_dev_sysfs_fmt = "????:??:{}"
153 path_glob = ""
154 for dev_func in path.split("/"):
155 dev_func = dev_func.zfill(4)
156 path_glob = os.path.join(path_glob, pci_dev_sysfs_fmt.format(dev_func))
157
158 dir_list = glob.glob(os.path.join(parent_sysfs, path_glob))
159
160 return dir_list
161
162
163def find_in_sysfs(device, parent_sysfs=None):
164 if parent_sysfs and device.get("path"):
165 pathdirs = path_to_dir(
166 parent_sysfs, device["meta"]["type"], str(device["path"])
167 )
168 if len(pathdirs) != 1:
169 # Early return to report error
170 return pathdirs
171 pathdir = pathdirs[0]
172 sysfs_path = os.path.join(parent_sysfs, pathdir)
173 else:
174 sysfs_path = parent_sysfs
175
176 if is_controller(device):
177 return find_controller_in_sysfs(device, sysfs_path)
178 else:
179 return [sysfs_path]
180
181
182def check_driver_presence(sysfs_dir, current_node):
183 if current_node["meta"]["type"] == "usb-device":
184 usb_intf_fmt = "*-*:*.{}"
185
186 interfaces = []
187 for i in current_node["interfaces"]:
188 interfaces.append((i, usb_intf_fmt.format(i)))
189
190 for intf_num, intf_dir_fmt in interfaces:
191 test_name = f"{current_node['meta']['pathname']}.{intf_num}.driver"
192
193 intf_dirs = glob.glob(os.path.join(sysfs_dir, intf_dir_fmt))
194 if len(intf_dirs) != 1:
195 ksft.test_result_fail(test_name)
196 continue
197 intf_dir = intf_dirs[0]
198
199 driver_link = os.path.join(sysfs_dir, intf_dir, "driver")
200 ksft.test_result(os.path.isdir(driver_link), test_name)
201 else:
202 driver_link = os.path.join(sysfs_dir, "driver")
203 test_name = current_node["meta"]["pathname"] + ".driver"
204 ksft.test_result(os.path.isdir(driver_link), test_name)
205
206
207def generate_pathname(device):
208 pathname = ""
209
210 if device.get("path"):
211 pathname = str(device["path"])
212
213 if device.get("type"):
214 dev_type = device["type"]
215 if device.get("usb-version"):
216 dev_type = dev_type.replace("usb", "usb" + str(device["usb-version"]))
217 if device.get("acpi-uid") is not None:
218 dev_type = dev_type.replace("pci", "pci" + str(device["acpi-uid"]))
219 pathname = pathname + "/" + dev_type
220
221 if device.get("dt-mmio"):
222 pathname += "@" + str(device["dt-mmio"])
223
224 if device.get("of-fullname-regex"):
225 pathname += "-" + str(device["of-fullname-regex"])
226
227 if device.get("name"):
228 pathname = pathname + "/" + device["name"]
229
230 return pathname
231
232
233def fill_meta_keys(child, parent=None):
234 child["meta"] = {}
235
236 if parent:
237 child["meta"]["type"] = parent["type"].replace("controller", "device")
238
239 pathname = generate_pathname(child)
240 if parent:
241 pathname = parent["meta"]["pathname"] + "/" + pathname
242 child["meta"]["pathname"] = pathname
243
244
245def parse_device_tree_node(current_node, parent_sysfs=None):
246 if not parent_sysfs:
247 fill_meta_keys(current_node)
248
249 sysfs_dirs = find_in_sysfs(current_node, parent_sysfs)
250 if len(sysfs_dirs) != 1:
251 if len(sysfs_dirs) == 0:
252 ksft.test_result_fail(
253 f"Couldn't find in sysfs: {current_node['meta']['pathname']}"
254 )
255 else:
256 ksft.test_result_fail(
257 f"Found multiple sysfs entries for {current_node['meta']['pathname']}: {sysfs_dirs}"
258 )
259 return
260 sysfs_dir = sysfs_dirs[0]
261
262 if not is_controller(current_node):
263 ksft.test_result(
264 os.path.exists(sysfs_dir), current_node["meta"]["pathname"] + ".device"
265 )
266 check_driver_presence(sysfs_dir, current_node)
267 else:
268 for child_device in current_node["devices"]:
269 fill_meta_keys(child_device, current_node)
270 parse_device_tree_node(child_device, sysfs_dir)
271
272
273def count_tests(device_trees):
274 test_count = 0
275
276 def parse_node(device):
277 nonlocal test_count
278 if device.get("devices"):
279 for child in device["devices"]:
280 parse_node(child)
281 else:
282 if device.get("interfaces"):
283 test_count += len(device["interfaces"])
284 else:
285 test_count += 1
286 test_count += 1
287
288 for device_tree in device_trees:
289 parse_node(device_tree)
290
291 return test_count
292
293
294def get_board_filenames():
295 filenames = []
296
297 platform_compatible_file = "/proc/device-tree/compatible"
298 if os.path.exists(platform_compatible_file):
299 with open(platform_compatible_file) as f:
300 for line in f:
301 filenames.extend(line.split("\0"))
302 else:
303 dmi_id_dir = "/sys/devices/virtual/dmi/id"
304 vendor_dmi_file = os.path.join(dmi_id_dir, "sys_vendor")
305 product_dmi_file = os.path.join(dmi_id_dir, "product_name")
306
307 with open(vendor_dmi_file) as f:
308 vendor = f.read().replace("\n", "")
309 with open(product_dmi_file) as f:
310 product = f.read().replace("\n", "")
311
312 filenames = [vendor + "," + product]
313
314 return filenames
315
316
317def run_test(yaml_file):
318 ksft.print_msg(f"Using board file: {yaml_file}")
319
320 with open(yaml_file) as f:
321 device_trees = yaml.safe_load(f)
322
323 ksft.set_plan(count_tests(device_trees))
324
325 for device_tree in device_trees:
326 parse_device_tree_node(device_tree)
327
328
329parser = argparse.ArgumentParser()
330parser.add_argument(
331 "--boards-dir", default="boards", help="Directory containing the board YAML files"
332)
333args = parser.parse_args()
334
335find_pci_controller_dirs()
336find_usb_controller_dirs()
337
338ksft.print_header()
339
340if not os.path.exists(args.boards_dir):
341 ksft.print_msg(f"Boards directory '{args.boards_dir}' doesn't exist")
342 ksft.exit_fail()
343
344board_file = ""
345for board_filename in get_board_filenames():
346 full_board_filename = os.path.join(args.boards_dir, board_filename + ".yaml")
347
348 if os.path.exists(full_board_filename):
349 board_file = full_board_filename
350 break
351
352if not board_file:
353 ksft.print_msg("No matching board file found")
354 ksft.exit_fail()
355
356run_test(board_file)
357
358ksft.finished()