1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
5 * Copyright (c) 2018 The FreeBSD Foundation
6 * All rights reserved.
7 *
8 * This software was developed by SRI International and the University of
9 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
10 * ("CTSRD"), as part of the DARPA CRASH research programme.
11 *
12 * Portions of this software were developed by Edward Tomasz Napierala
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36 /*
37 * USB template for CDC ACM (serial), CDC ECM (network), and CDC MSC (storage).
38 */
39
40 #include <sys/cdefs.h>
41 #ifdef USB_GLOBAL_INCLUDE_FILE
42 #include USB_GLOBAL_INCLUDE_FILE
43 #else
44 #include <sys/stdint.h>
45 #include <sys/stddef.h>
46 #include <sys/param.h>
47 #include <sys/queue.h>
48 #include <sys/types.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
51 #include <sys/bus.h>
52 #include <sys/module.h>
53 #include <sys/lock.h>
54 #include <sys/mutex.h>
55 #include <sys/condvar.h>
56 #include <sys/sysctl.h>
57 #include <sys/sx.h>
58 #include <sys/unistd.h>
59 #include <sys/callout.h>
60 #include <sys/malloc.h>
61 #include <sys/priv.h>
62
63 #include <dev/usb/usb.h>
64 #include <dev/usb/usbdi.h>
65 #include <dev/usb/usb_core.h>
66 #include <dev/usb/usb_cdc.h>
67 #include <dev/usb/usb_ioctl.h>
68 #include <dev/usb/usb_util.h>
69
70 #include <dev/usb/template/usb_template.h>
71 #endif /* USB_GLOBAL_INCLUDE_FILE */
72
73 #define MODEM_IFACE_0 0
74 #define MODEM_IFACE_1 1
75
76 enum {
77 MULTI_LANG_INDEX,
78 MULTI_MODEM_INDEX,
79 MULTI_ETH_MAC_INDEX,
80 MULTI_ETH_CONTROL_INDEX,
81 MULTI_ETH_DATA_INDEX,
82 MULTI_STORAGE_INDEX,
83 MULTI_CONFIGURATION_INDEX,
84 MULTI_MANUFACTURER_INDEX,
85 MULTI_PRODUCT_INDEX,
86 MULTI_SERIAL_NUMBER_INDEX,
87 MULTI_MAX_INDEX,
88 };
89
90 #define MULTI_DEFAULT_VENDOR_ID USB_TEMPLATE_VENDOR
91 #define MULTI_DEFAULT_PRODUCT_ID 0x05dc
92 #define MULTI_DEFAULT_MODEM "Virtual serial port"
93 #define MULTI_DEFAULT_ETH_MAC "2A02030405060789AB"
94 #define MULTI_DEFAULT_ETH_CONTROL "Ethernet Comm Interface"
95 #define MULTI_DEFAULT_ETH_DATA "Ethernet Data Interface"
96 #define MULTI_DEFAULT_STORAGE "Mass Storage Interface"
97 #define MULTI_DEFAULT_CONFIGURATION "Default configuration"
98 #define MULTI_DEFAULT_MANUFACTURER USB_TEMPLATE_MANUFACTURER
99 #define MULTI_DEFAULT_PRODUCT "Multifunction Device"
100 /*
101 * The reason for this being called like this is that OSX
102 * derives the device node name from it, resulting in a somewhat
103 * user-friendly "/dev/cu.usbmodemFreeBSD1". And yes, the "1"
104 * needs to be there, otherwise OSX will mangle it.
105 */
106 #define MULTI_DEFAULT_SERIAL_NUMBER "FreeBSD1"
107
108 static struct usb_string_descriptor multi_modem;
109 static struct usb_string_descriptor multi_eth_mac;
110 static struct usb_string_descriptor multi_eth_control;
111 static struct usb_string_descriptor multi_eth_data;
112 static struct usb_string_descriptor multi_storage;
113 static struct usb_string_descriptor multi_configuration;
114 static struct usb_string_descriptor multi_manufacturer;
115 static struct usb_string_descriptor multi_product;
116 static struct usb_string_descriptor multi_serial_number;
117
118 static struct sysctl_ctx_list multi_ctx_list;
119
120 /* prototypes */
121
122 static usb_temp_get_string_desc_t multi_get_string_desc;
123
124 static const struct usb_cdc_union_descriptor eth_union_desc = {
125 .bLength = sizeof(eth_union_desc),
126 .bDescriptorType = UDESC_CS_INTERFACE,
127 .bDescriptorSubtype = UDESCSUB_CDC_UNION,
128 .bMasterInterface = 0, /* this is automatically updated */
129 .bSlaveInterface[0] = 1, /* this is automatically updated */
130 };
131
132 static const struct usb_cdc_header_descriptor eth_header_desc = {
133 .bLength = sizeof(eth_header_desc),
134 .bDescriptorType = UDESC_CS_INTERFACE,
135 .bDescriptorSubtype = UDESCSUB_CDC_HEADER,
136 .bcdCDC[0] = 0x10,
137 .bcdCDC[1] = 0x01,
138 };
139
140 static const struct usb_cdc_ethernet_descriptor eth_enf_desc = {
141 .bLength = sizeof(eth_enf_desc),
142 .bDescriptorType = UDESC_CS_INTERFACE,
143 .bDescriptorSubtype = UDESCSUB_CDC_ENF,
144 .iMacAddress = MULTI_ETH_MAC_INDEX,
145 .bmEthernetStatistics = {0, 0, 0, 0},
146 .wMaxSegmentSize = {0xEA, 0x05},/* 1514 bytes */
147 .wNumberMCFilters = {0, 0},
148 .bNumberPowerFilters = 0,
149 };
150
151 static const void *eth_control_if_desc[] = {
152 ð_union_desc,
153 ð_header_desc,
154 ð_enf_desc,
155 NULL,
156 };
157
158 static const struct usb_temp_packet_size bulk_mps = {
159 .mps[USB_SPEED_FULL] = 64,
160 .mps[USB_SPEED_HIGH] = 512,
161 };
162
163 static const struct usb_temp_packet_size intr_mps = {
164 .mps[USB_SPEED_FULL] = 8,
165 .mps[USB_SPEED_HIGH] = 8,
166 };
167
168 static const struct usb_temp_endpoint_desc bulk_in_ep = {
169 .pPacketSize = &bulk_mps,
170 #ifdef USB_HIP_IN_EP_0
171 .bEndpointAddress = USB_HIP_IN_EP_0,
172 #else
173 .bEndpointAddress = UE_DIR_IN,
174 #endif
175 .bmAttributes = UE_BULK,
176 };
177
178 static const struct usb_temp_endpoint_desc bulk_out_ep = {
179 .pPacketSize = &bulk_mps,
180 #ifdef USB_HIP_OUT_EP_0
181 .bEndpointAddress = USB_HIP_OUT_EP_0,
182 #else
183 .bEndpointAddress = UE_DIR_OUT,
184 #endif
185 .bmAttributes = UE_BULK,
186 };
187
188 static const struct usb_temp_endpoint_desc intr_in_ep = {
189 .pPacketSize = &intr_mps,
190 .bEndpointAddress = UE_DIR_IN,
191 .bmAttributes = UE_INTERRUPT,
192 };
193
194 static const struct usb_temp_endpoint_desc *eth_intr_endpoints[] = {
195 &intr_in_ep,
196 NULL,
197 };
198
199 static const struct usb_temp_interface_desc eth_control_interface = {
200 .ppEndpoints = eth_intr_endpoints,
201 .ppRawDesc = eth_control_if_desc,
202 .bInterfaceClass = UICLASS_CDC,
203 .bInterfaceSubClass = UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL,
204 .bInterfaceProtocol = UIPROTO_CDC_NONE,
205 .iInterface = MULTI_ETH_CONTROL_INDEX,
206 };
207
208 static const struct usb_temp_endpoint_desc *eth_data_endpoints[] = {
209 &bulk_in_ep,
210 &bulk_out_ep,
211 NULL,
212 };
213
214 static const struct usb_temp_interface_desc eth_data_null_interface = {
215 .ppEndpoints = NULL, /* no endpoints */
216 .bInterfaceClass = UICLASS_CDC_DATA,
217 .bInterfaceSubClass = UISUBCLASS_DATA,
218 .bInterfaceProtocol = 0,
219 .iInterface = MULTI_ETH_DATA_INDEX,
220 };
221
222 static const struct usb_temp_interface_desc eth_data_interface = {
223 .ppEndpoints = eth_data_endpoints,
224 .bInterfaceClass = UICLASS_CDC_DATA,
225 .bInterfaceSubClass = UISUBCLASS_DATA,
226 .bInterfaceProtocol = 0,
227 .iInterface = MULTI_ETH_DATA_INDEX,
228 .isAltInterface = 1, /* this is an alternate setting */
229 };
230
231 static const struct usb_temp_packet_size modem_bulk_mps = {
232 .mps[USB_SPEED_LOW] = 8,
233 .mps[USB_SPEED_FULL] = 64,
234 .mps[USB_SPEED_HIGH] = 512,
235 };
236
237 static const struct usb_temp_packet_size modem_intr_mps = {
238 .mps[USB_SPEED_LOW] = 8,
239 .mps[USB_SPEED_FULL] = 8,
240 .mps[USB_SPEED_HIGH] = 8,
241 };
242
243 static const struct usb_temp_interval modem_intr_interval = {
244 .bInterval[USB_SPEED_LOW] = 8, /* 8ms */
245 .bInterval[USB_SPEED_FULL] = 8, /* 8ms */
246 .bInterval[USB_SPEED_HIGH] = 7, /* 8ms */
247 };
248
249 static const struct usb_temp_endpoint_desc modem_ep_0 = {
250 .pPacketSize = &modem_intr_mps,
251 .pIntervals = &modem_intr_interval,
252 .bEndpointAddress = UE_DIR_IN,
253 .bmAttributes = UE_INTERRUPT,
254 };
255
256 static const struct usb_temp_endpoint_desc modem_ep_1 = {
257 .pPacketSize = &modem_bulk_mps,
258 .bEndpointAddress = UE_DIR_OUT,
259 .bmAttributes = UE_BULK,
260 };
261
262 static const struct usb_temp_endpoint_desc modem_ep_2 = {
263 .pPacketSize = &modem_bulk_mps,
264 .bEndpointAddress = UE_DIR_IN,
265 .bmAttributes = UE_BULK,
266 };
267
268 static const struct usb_temp_endpoint_desc *modem_iface_0_ep[] = {
269 &modem_ep_0,
270 NULL,
271 };
272
273 static const struct usb_temp_endpoint_desc *modem_iface_1_ep[] = {
274 &modem_ep_1,
275 &modem_ep_2,
276 NULL,
277 };
278
279 static const uint8_t modem_raw_desc_0[] = {
280 0x05, 0x24, 0x00, 0x10, 0x01
281 };
282
283 static const uint8_t modem_raw_desc_1[] = {
284 0x05, 0x24, 0x06, MODEM_IFACE_0, MODEM_IFACE_1
285 };
286
287 static const uint8_t modem_raw_desc_2[] = {
288 0x05, 0x24, 0x01, 0x03, MODEM_IFACE_1
289 };
290
291 static const uint8_t modem_raw_desc_3[] = {
292 0x04, 0x24, 0x02, 0x07
293 };
294
295 static const void *modem_iface_0_desc[] = {
296 &modem_raw_desc_0,
297 &modem_raw_desc_1,
298 &modem_raw_desc_2,
299 &modem_raw_desc_3,
300 NULL,
301 };
302
303 static const struct usb_temp_interface_desc modem_iface_0 = {
304 .ppRawDesc = modem_iface_0_desc,
305 .ppEndpoints = modem_iface_0_ep,
306 .bInterfaceClass = UICLASS_CDC,
307 .bInterfaceSubClass = UISUBCLASS_ABSTRACT_CONTROL_MODEL,
308 .bInterfaceProtocol = UIPROTO_CDC_NONE,
309 .iInterface = MULTI_MODEM_INDEX,
310 };
311
312 static const struct usb_temp_interface_desc modem_iface_1 = {
313 .ppEndpoints = modem_iface_1_ep,
314 .bInterfaceClass = UICLASS_CDC_DATA,
315 .bInterfaceSubClass = UISUBCLASS_DATA,
316 .bInterfaceProtocol = 0,
317 .iInterface = MULTI_MODEM_INDEX,
318 };
319
320 static const struct usb_temp_packet_size msc_bulk_mps = {
321 .mps[USB_SPEED_FULL] = 64,
322 .mps[USB_SPEED_HIGH] = 512,
323 };
324
325 static const struct usb_temp_endpoint_desc msc_bulk_in_ep = {
326 .pPacketSize = &msc_bulk_mps,
327 #ifdef USB_HIP_IN_EP_0
328 .bEndpointAddress = USB_HIP_IN_EP_0,
329 #else
330 .bEndpointAddress = UE_DIR_IN,
331 #endif
332 .bmAttributes = UE_BULK,
333 };
334
335 static const struct usb_temp_endpoint_desc msc_bulk_out_ep = {
336 .pPacketSize = &msc_bulk_mps,
337 #ifdef USB_HIP_OUT_EP_0
338 .bEndpointAddress = USB_HIP_OUT_EP_0,
339 #else
340 .bEndpointAddress = UE_DIR_OUT,
341 #endif
342 .bmAttributes = UE_BULK,
343 };
344
345 static const struct usb_temp_endpoint_desc *msc_data_endpoints[] = {
346 &msc_bulk_in_ep,
347 &msc_bulk_out_ep,
348 NULL,
349 };
350
351 static const struct usb_temp_interface_desc msc_data_interface = {
352 .ppEndpoints = msc_data_endpoints,
353 .bInterfaceClass = UICLASS_MASS,
354 .bInterfaceSubClass = UISUBCLASS_SCSI,
355 .bInterfaceProtocol = UIPROTO_MASS_BBB,
356 .iInterface = MULTI_STORAGE_INDEX,
357 };
358
359 static const struct usb_temp_interface_desc *multi_interfaces[] = {
360 &modem_iface_0,
361 &modem_iface_1,
362 ð_control_interface,
363 ð_data_null_interface,
364 ð_data_interface,
365 &msc_data_interface,
366 NULL,
367 };
368
369 static const struct usb_temp_config_desc multi_config_desc = {
370 .ppIfaceDesc = multi_interfaces,
371 .bmAttributes = 0,
372 .bMaxPower = 0,
373 .iConfiguration = MULTI_CONFIGURATION_INDEX,
374 };
375 static const struct usb_temp_config_desc *multi_configs[] = {
376 &multi_config_desc,
377 NULL,
378 };
379
380 struct usb_temp_device_desc usb_template_multi = {
381 .getStringDesc = &multi_get_string_desc,
382 .ppConfigDesc = multi_configs,
383 .idVendor = MULTI_DEFAULT_VENDOR_ID,
384 .idProduct = MULTI_DEFAULT_PRODUCT_ID,
385 .bcdDevice = 0x0100,
386 .bDeviceClass = UDCLASS_IN_INTERFACE,
387 .bDeviceSubClass = 0,
388 .bDeviceProtocol = 0,
389 .iManufacturer = MULTI_MANUFACTURER_INDEX,
390 .iProduct = MULTI_PRODUCT_INDEX,
391 .iSerialNumber = MULTI_SERIAL_NUMBER_INDEX,
392 };
393
394 /*------------------------------------------------------------------------*
395 * multi_get_string_desc
396 *
397 * Return values:
398 * NULL: Failure. No such string.
399 * Else: Success. Pointer to string descriptor is returned.
400 *------------------------------------------------------------------------*/
401 static const void *
multi_get_string_desc(uint16_t lang_id,uint8_t string_index)402 multi_get_string_desc(uint16_t lang_id, uint8_t string_index)
403 {
404 static const void *ptr[MULTI_MAX_INDEX] = {
405 [MULTI_LANG_INDEX] = &usb_string_lang_en,
406 [MULTI_MODEM_INDEX] = &multi_modem,
407 [MULTI_ETH_MAC_INDEX] = &multi_eth_mac,
408 [MULTI_ETH_CONTROL_INDEX] = &multi_eth_control,
409 [MULTI_ETH_DATA_INDEX] = &multi_eth_data,
410 [MULTI_STORAGE_INDEX] = &multi_storage,
411 [MULTI_CONFIGURATION_INDEX] = &multi_configuration,
412 [MULTI_MANUFACTURER_INDEX] = &multi_manufacturer,
413 [MULTI_PRODUCT_INDEX] = &multi_product,
414 [MULTI_SERIAL_NUMBER_INDEX] = &multi_serial_number,
415 };
416
417 if (string_index == 0) {
418 return (&usb_string_lang_en);
419 }
420 if (lang_id != 0x0409) {
421 return (NULL);
422 }
423 if (string_index < MULTI_MAX_INDEX) {
424 return (ptr[string_index]);
425 }
426 return (NULL);
427 }
428
429 static void
multi_init(void * arg __unused)430 multi_init(void *arg __unused)
431 {
432 struct sysctl_oid *parent;
433 char parent_name[3];
434
435 usb_make_str_desc(&multi_modem, sizeof(multi_modem),
436 MULTI_DEFAULT_MODEM);
437 usb_make_str_desc(&multi_eth_mac, sizeof(multi_eth_mac),
438 MULTI_DEFAULT_ETH_MAC);
439 usb_make_str_desc(&multi_eth_control, sizeof(multi_eth_control),
440 MULTI_DEFAULT_ETH_CONTROL);
441 usb_make_str_desc(&multi_eth_data, sizeof(multi_eth_data),
442 MULTI_DEFAULT_ETH_DATA);
443 usb_make_str_desc(&multi_storage, sizeof(multi_storage),
444 MULTI_DEFAULT_STORAGE);
445 usb_make_str_desc(&multi_configuration, sizeof(multi_configuration),
446 MULTI_DEFAULT_CONFIGURATION);
447 usb_make_str_desc(&multi_manufacturer, sizeof(multi_manufacturer),
448 MULTI_DEFAULT_MANUFACTURER);
449 usb_make_str_desc(&multi_product, sizeof(multi_product),
450 MULTI_DEFAULT_PRODUCT);
451 usb_make_str_desc(&multi_serial_number, sizeof(multi_serial_number),
452 MULTI_DEFAULT_SERIAL_NUMBER);
453
454 snprintf(parent_name, sizeof(parent_name), "%d", USB_TEMP_MULTI);
455 sysctl_ctx_init(&multi_ctx_list);
456
457 parent = SYSCTL_ADD_NODE(&multi_ctx_list,
458 SYSCTL_STATIC_CHILDREN(_hw_usb_templates), OID_AUTO,
459 parent_name, CTLFLAG_RW | CTLFLAG_MPSAFE,
460 0, "USB Multifunction device side template");
461 SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
462 "vendor_id", CTLFLAG_RWTUN,
463 &usb_template_multi.idVendor, 1, "Vendor identifier");
464 SYSCTL_ADD_U16(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
465 "product_id", CTLFLAG_RWTUN,
466 &usb_template_multi.idProduct, 1, "Product identifier");
467 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
468 "eth_mac", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
469 &multi_eth_mac, sizeof(multi_eth_mac), usb_temp_sysctl,
470 "A", "Ethernet MAC address string");
471 #if 0
472 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
473 "modem", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
474 &multi_modem, sizeof(multi_modem), usb_temp_sysctl,
475 "A", "Modem interface string");
476 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
477 "eth_control", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
478 &multi_eth_control, sizeof(multi_eth_data), usb_temp_sysctl,
479 "A", "Ethernet control interface string");
480 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
481 "eth_data", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
482 &multi_eth_data, sizeof(multi_eth_data), usb_temp_sysctl,
483 "A", "Ethernet data interface string");
484 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
485 "interface", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
486 &multi_storage, sizeof(multi_storage), usb_temp_sysctl,
487 "A", "Storage interface string");
488 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
489 "configuration", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
490 &multi_configuration, sizeof(multi_configuration), usb_temp_sysctl,
491 "A", "Configuration string");
492 #endif
493 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
494 "manufacturer", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
495 &multi_manufacturer, sizeof(multi_manufacturer), usb_temp_sysctl,
496 "A", "Manufacturer string");
497 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
498 "product", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
499 &multi_product, sizeof(multi_product), usb_temp_sysctl,
500 "A", "Product string");
501 SYSCTL_ADD_PROC(&multi_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
502 "serial_number", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
503 &multi_serial_number, sizeof(multi_serial_number), usb_temp_sysctl,
504 "A", "Serial number string");
505 }
506
507 static void
multi_uninit(void * arg __unused)508 multi_uninit(void *arg __unused)
509 {
510
511 sysctl_ctx_free(&multi_ctx_list);
512 }
513
514 SYSINIT(multi_init, SI_SUB_LOCK, SI_ORDER_FIRST, multi_init, NULL);
515 SYSUNINIT(multi_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, multi_uninit, NULL);
516