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Commit | Line | Data |
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00e5a55c BS |
1 | From 05a1f28e879e3b4d6a9c08e30b1898943f77b6e7 Mon Sep 17 00:00:00 2001 |
2 | From: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> | |
3 | Date: Wed, 9 Jul 2008 14:56:51 -0600 | |
4 | Subject: [PATCH 11/23] Staging: USB/IP: add common functions needed | |
5 | Patch-mainline: 2.6.28 | |
6 | ||
7 | This adds the common functions needed by both the host and client side | |
8 | of the USB/IP code. | |
9 | ||
10 | Brian Merrell cleaned up a lot of this code and submitted it for | |
11 | inclusion. Greg also did a lot of cleanup. | |
12 | ||
13 | Signed-off-by: Brian G. Merrell <bgmerrell@novell.com> | |
14 | Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> | |
15 | Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> | |
16 | --- | |
17 | drivers/staging/Kconfig | 2 + | |
18 | drivers/staging/Makefile | 1 + | |
19 | drivers/staging/usbip/Kconfig | 14 + | |
20 | drivers/staging/usbip/Makefile | 6 + | |
21 | drivers/staging/usbip/README | 6 + | |
22 | drivers/staging/usbip/usbip_common.c | 997 ++++++++++++++++++++++++++++++++++ | |
23 | drivers/staging/usbip/usbip_common.h | 406 ++++++++++++++ | |
24 | drivers/staging/usbip/usbip_event.c | 141 +++++ | |
25 | 8 files changed, 1573 insertions(+), 0 deletions(-) | |
26 | create mode 100644 drivers/staging/usbip/Kconfig | |
27 | create mode 100644 drivers/staging/usbip/Makefile | |
28 | create mode 100644 drivers/staging/usbip/README | |
29 | create mode 100644 drivers/staging/usbip/usbip_common.c | |
30 | create mode 100644 drivers/staging/usbip/usbip_common.h | |
31 | create mode 100644 drivers/staging/usbip/usbip_event.c | |
32 | ||
33 | diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig | |
34 | index f16bc9c..4dbf795 100644 | |
35 | --- a/drivers/staging/Kconfig | |
36 | +++ b/drivers/staging/Kconfig | |
37 | @@ -33,4 +33,6 @@ source "drivers/staging/me4000/Kconfig" | |
38 | ||
39 | source "drivers/staging/go7007/Kconfig" | |
40 | ||
41 | +source "drivers/staging/usbip/Kconfig" | |
42 | + | |
43 | endif # STAGING | |
44 | diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile | |
45 | index aa61662..be42c0d 100644 | |
46 | --- a/drivers/staging/Makefile | |
47 | +++ b/drivers/staging/Makefile | |
48 | @@ -5,3 +5,4 @@ obj-$(CONFIG_SLICOSS) += slicoss/ | |
49 | obj-$(CONFIG_SXG) += sxg/ | |
50 | obj-$(CONFIG_ME4000) += me4000/ | |
51 | obj-$(CONFIG_VIDEO_GO7007) += go7007/ | |
52 | +obj-$(CONFIG_USB_IP_COMMON) += usbip/ | |
53 | diff --git a/drivers/staging/usbip/Kconfig b/drivers/staging/usbip/Kconfig | |
54 | new file mode 100644 | |
55 | index 0000000..37efb5e | |
56 | --- /dev/null | |
57 | +++ b/drivers/staging/usbip/Kconfig | |
58 | @@ -0,0 +1,14 @@ | |
59 | +config USB_IP_COMMON | |
60 | + tristate "USB IP support (EXPERIMENTAL)" | |
61 | + depends on USB && EXPERIMENTAL | |
62 | + default N | |
63 | + ---help--- | |
64 | + This enables pushing USB packets over IP to allow remote | |
65 | + machines access to USB devices directly. For more details, | |
66 | + and links to the userspace utility programs to let this work | |
67 | + properly, see http://usbip.naist.jp/ | |
68 | + | |
69 | + To compile this driver as a module, choose M here: the | |
70 | + module will be called usbip_common_mod. | |
71 | + | |
72 | + If unsure, say N. | |
73 | diff --git a/drivers/staging/usbip/Makefile b/drivers/staging/usbip/Makefile | |
74 | new file mode 100644 | |
75 | index 0000000..ce925ca | |
76 | --- /dev/null | |
77 | +++ b/drivers/staging/usbip/Makefile | |
78 | @@ -0,0 +1,6 @@ | |
79 | +obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o | |
80 | +usbip_common_mod-objs := usbip_common.o usbip_event.o | |
81 | + | |
82 | +ifeq ($(CONFIG_USB_DEBUG),y) | |
83 | + EXTRA_CFLAGS += -DDEBUG | |
84 | +endif | |
85 | diff --git a/drivers/staging/usbip/README b/drivers/staging/usbip/README | |
86 | new file mode 100644 | |
87 | index 0000000..c11be57 | |
88 | --- /dev/null | |
89 | +++ b/drivers/staging/usbip/README | |
90 | @@ -0,0 +1,6 @@ | |
91 | +TODO: | |
92 | + - more discussion about the protocol | |
93 | + - testing | |
94 | + - review of the userspace interface | |
95 | + | |
96 | +Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com> | |
97 | diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c | |
98 | new file mode 100644 | |
99 | index 0000000..e64918f | |
100 | --- /dev/null | |
101 | +++ b/drivers/staging/usbip/usbip_common.c | |
102 | @@ -0,0 +1,997 @@ | |
103 | +/* | |
104 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
105 | + * | |
106 | + * This is free software; you can redistribute it and/or modify | |
107 | + * it under the terms of the GNU General Public License as published by | |
108 | + * the Free Software Foundation; either version 2 of the License, or | |
109 | + * (at your option) any later version. | |
110 | + * | |
111 | + * This is distributed in the hope that it will be useful, | |
112 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
113 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
114 | + * GNU General Public License for more details. | |
115 | + * | |
116 | + * You should have received a copy of the GNU General Public License | |
117 | + * along with this program; if not, write to the Free Software | |
118 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
119 | + * USA. | |
120 | + */ | |
121 | + | |
122 | +#include <linux/kernel.h> | |
123 | +#include <linux/file.h> | |
124 | +#include <linux/tcp.h> | |
125 | +#include <linux/in.h> | |
126 | +#include "usbip_common.h" | |
127 | + | |
128 | +/* version information */ | |
129 | +#define DRIVER_VERSION "1.0" | |
130 | +#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>" | |
131 | +#define DRIVER_DESC "usbip common driver" | |
132 | + | |
133 | +/*-------------------------------------------------------------------------*/ | |
134 | +/* debug routines */ | |
135 | + | |
136 | +#ifdef CONFIG_USB_DEBUG | |
137 | +unsigned long usbip_debug_flag = 0xffffffff; | |
138 | +#else | |
139 | +unsigned long usbip_debug_flag; | |
140 | +#endif | |
141 | +EXPORT_SYMBOL_GPL(usbip_debug_flag); | |
142 | + | |
143 | + | |
144 | +/* FIXME */ | |
145 | +struct device_attribute dev_attr_usbip_debug; | |
146 | +EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); | |
147 | + | |
148 | + | |
149 | +static ssize_t show_flag(struct device *dev, struct device_attribute *attr, | |
150 | + char *buf) | |
151 | +{ | |
152 | + return sprintf(buf, "%lx\n", usbip_debug_flag); | |
153 | +} | |
154 | + | |
155 | +static ssize_t store_flag(struct device *dev, struct device_attribute *attr, | |
156 | + const char *buf, size_t count) | |
157 | +{ | |
158 | + unsigned long flag; | |
159 | + | |
160 | + sscanf(buf, "%lx", &flag); | |
161 | + usbip_debug_flag = flag; | |
162 | + | |
163 | + return count; | |
164 | +} | |
165 | +DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag); | |
166 | + | |
167 | +static void usbip_dump_buffer(char *buff, int bufflen) | |
168 | +{ | |
169 | + int i; | |
170 | + | |
171 | + if (bufflen > 128) { | |
172 | + for (i = 0; i < 128; i++) { | |
173 | + if (i%24 == 0) | |
174 | + printk(" "); | |
175 | + printk("%02x ", (unsigned char) buff[i]); | |
176 | + if (i%4 == 3) | |
177 | + printk("| "); | |
178 | + if (i%24 == 23) | |
179 | + printk("\n"); | |
180 | + } | |
181 | + printk("... (%d byte)\n", bufflen); | |
182 | + return; | |
183 | + } | |
184 | + | |
185 | + for (i = 0; i < bufflen; i++) { | |
186 | + if (i%24 == 0) | |
187 | + printk(" "); | |
188 | + printk("%02x ", (unsigned char) buff[i]); | |
189 | + if (i%4 == 3) | |
190 | + printk("| "); | |
191 | + if (i%24 == 23) | |
192 | + printk("\n"); | |
193 | + } | |
194 | + printk("\n"); | |
195 | + | |
196 | +} | |
197 | + | |
198 | +static void usbip_dump_pipe(unsigned int p) | |
199 | +{ | |
200 | + unsigned char type = usb_pipetype(p); | |
201 | + unsigned char ep = usb_pipeendpoint(p); | |
202 | + unsigned char dev = usb_pipedevice(p); | |
203 | + unsigned char dir = usb_pipein(p); | |
204 | + | |
205 | + printk("dev(%d) ", dev); | |
206 | + printk("ep(%d) ", ep); | |
207 | + printk("%s ", dir ? "IN" : "OUT"); | |
208 | + | |
209 | + switch (type) { | |
210 | + case PIPE_ISOCHRONOUS: | |
211 | + printk("%s ", "ISO"); | |
212 | + break; | |
213 | + case PIPE_INTERRUPT: | |
214 | + printk("%s ", "INT"); | |
215 | + break; | |
216 | + case PIPE_CONTROL: | |
217 | + printk("%s ", "CTL"); | |
218 | + break; | |
219 | + case PIPE_BULK: | |
220 | + printk("%s ", "BLK"); | |
221 | + break; | |
222 | + default: | |
223 | + printk("ERR"); | |
224 | + } | |
225 | + | |
226 | + printk("\n"); | |
227 | + | |
228 | +} | |
229 | + | |
230 | +static void usbip_dump_usb_device(struct usb_device *udev) | |
231 | +{ | |
232 | + struct device *dev = &udev->dev; | |
233 | + int i; | |
234 | + | |
235 | + dev_dbg(dev, " devnum(%d) devpath(%s)", | |
236 | + udev->devnum, udev->devpath); | |
237 | + | |
238 | + switch (udev->speed) { | |
239 | + case USB_SPEED_HIGH: | |
240 | + printk(" SPD_HIGH"); | |
241 | + break; | |
242 | + case USB_SPEED_FULL: | |
243 | + printk(" SPD_FULL"); | |
244 | + break; | |
245 | + case USB_SPEED_LOW: | |
246 | + printk(" SPD_LOW"); | |
247 | + break; | |
248 | + case USB_SPEED_UNKNOWN: | |
249 | + printk(" SPD_UNKNOWN"); | |
250 | + break; | |
251 | + default: | |
252 | + printk(" SPD_ERROR"); | |
253 | + } | |
254 | + | |
255 | + printk(" tt %p, ttport %d", udev->tt, udev->ttport); | |
256 | + printk("\n"); | |
257 | + | |
258 | + dev_dbg(dev, " "); | |
259 | + for (i = 0; i < 16; i++) | |
260 | + printk(" %2u", i); | |
261 | + printk("\n"); | |
262 | + | |
263 | + dev_dbg(dev, " toggle0(IN) :"); | |
264 | + for (i = 0; i < 16; i++) | |
265 | + printk(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0); | |
266 | + printk("\n"); | |
267 | + | |
268 | + dev_dbg(dev, " toggle1(OUT):"); | |
269 | + for (i = 0; i < 16; i++) | |
270 | + printk(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0); | |
271 | + printk("\n"); | |
272 | + | |
273 | + | |
274 | + dev_dbg(dev, " epmaxp_in :"); | |
275 | + for (i = 0; i < 16; i++) { | |
276 | + if (udev->ep_in[i]) | |
277 | + printk(" %2u", | |
278 | + le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize)); | |
279 | + } | |
280 | + printk("\n"); | |
281 | + | |
282 | + dev_dbg(dev, " epmaxp_out :"); | |
283 | + for (i = 0; i < 16; i++) { | |
284 | + if (udev->ep_out[i]) | |
285 | + printk(" %2u", | |
286 | + le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize)); | |
287 | + } | |
288 | + printk("\n"); | |
289 | + | |
290 | + dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus); | |
291 | + | |
292 | + dev_dbg(dev, "descriptor %p, config %p, actconfig %p, " | |
293 | + "rawdescriptors %p\n", &udev->descriptor, udev->config, | |
294 | + udev->actconfig, udev->rawdescriptors); | |
295 | + | |
296 | + dev_dbg(dev, "have_langid %d, string_langid %d\n", | |
297 | + udev->have_langid, udev->string_langid); | |
298 | + | |
299 | + dev_dbg(dev, "maxchild %d, children %p\n", | |
300 | + udev->maxchild, udev->children); | |
301 | +} | |
302 | + | |
303 | +static void usbip_dump_request_type(__u8 rt) | |
304 | +{ | |
305 | + switch (rt & USB_RECIP_MASK) { | |
306 | + case USB_RECIP_DEVICE: | |
307 | + printk("DEVICE"); | |
308 | + break; | |
309 | + case USB_RECIP_INTERFACE: | |
310 | + printk("INTERF"); | |
311 | + break; | |
312 | + case USB_RECIP_ENDPOINT: | |
313 | + printk("ENDPOI"); | |
314 | + break; | |
315 | + case USB_RECIP_OTHER: | |
316 | + printk("OTHER "); | |
317 | + break; | |
318 | + default: | |
319 | + printk("------"); | |
320 | + } | |
321 | +} | |
322 | + | |
323 | +static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd) | |
324 | +{ | |
325 | + if (!cmd) { | |
326 | + printk(" %s : null pointer\n", __FUNCTION__); | |
327 | + return; | |
328 | + } | |
329 | + | |
330 | + printk(" "); | |
331 | + printk("bRequestType(%02X) ", cmd->bRequestType); | |
332 | + printk("bRequest(%02X) " , cmd->bRequest); | |
333 | + printk("wValue(%04X) ", cmd->wValue); | |
334 | + printk("wIndex(%04X) ", cmd->wIndex); | |
335 | + printk("wLength(%04X) ", cmd->wLength); | |
336 | + | |
337 | + printk("\n "); | |
338 | + | |
339 | + if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
340 | + printk("STANDARD "); | |
341 | + switch (cmd->bRequest) { | |
342 | + case USB_REQ_GET_STATUS: | |
343 | + printk("GET_STATUS"); | |
344 | + break; | |
345 | + case USB_REQ_CLEAR_FEATURE: | |
346 | + printk("CLEAR_FEAT"); | |
347 | + break; | |
348 | + case USB_REQ_SET_FEATURE: | |
349 | + printk("SET_FEAT "); | |
350 | + break; | |
351 | + case USB_REQ_SET_ADDRESS: | |
352 | + printk("SET_ADDRRS"); | |
353 | + break; | |
354 | + case USB_REQ_GET_DESCRIPTOR: | |
355 | + printk("GET_DESCRI"); | |
356 | + break; | |
357 | + case USB_REQ_SET_DESCRIPTOR: | |
358 | + printk("SET_DESCRI"); | |
359 | + break; | |
360 | + case USB_REQ_GET_CONFIGURATION: | |
361 | + printk("GET_CONFIG"); | |
362 | + break; | |
363 | + case USB_REQ_SET_CONFIGURATION: | |
364 | + printk("SET_CONFIG"); | |
365 | + break; | |
366 | + case USB_REQ_GET_INTERFACE: | |
367 | + printk("GET_INTERF"); | |
368 | + break; | |
369 | + case USB_REQ_SET_INTERFACE: | |
370 | + printk("SET_INTERF"); | |
371 | + break; | |
372 | + case USB_REQ_SYNCH_FRAME: | |
373 | + printk("SYNC_FRAME"); | |
374 | + break; | |
375 | + default: | |
376 | + printk("REQ(%02X) ", cmd->bRequest); | |
377 | + } | |
378 | + | |
379 | + printk(" "); | |
380 | + usbip_dump_request_type(cmd->bRequestType); | |
381 | + | |
382 | + } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) | |
383 | + printk("CLASS "); | |
384 | + | |
385 | + else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) | |
386 | + printk("VENDOR "); | |
387 | + | |
388 | + else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) | |
389 | + printk("RESERVED"); | |
390 | + | |
391 | + printk("\n"); | |
392 | +} | |
393 | + | |
394 | +void usbip_dump_urb(struct urb *urb) | |
395 | +{ | |
396 | + struct device *dev; | |
397 | + | |
398 | + if (!urb) { | |
399 | + printk(KERN_DEBUG KBUILD_MODNAME | |
400 | + ":%s: urb: null pointer!!\n", __func__); | |
401 | + return; | |
402 | + } | |
403 | + | |
404 | + if (!urb->dev) { | |
405 | + printk(KERN_DEBUG KBUILD_MODNAME | |
406 | + ":%s: urb->dev: null pointer!!\n", __func__); | |
407 | + return; | |
408 | + } | |
409 | + dev = &urb->dev->dev; | |
410 | + | |
411 | + dev_dbg(dev, " urb :%p\n", urb); | |
412 | + dev_dbg(dev, " dev :%p\n", urb->dev); | |
413 | + | |
414 | + usbip_dump_usb_device(urb->dev); | |
415 | + | |
416 | + dev_dbg(dev, " pipe :%08x ", urb->pipe); | |
417 | + | |
418 | + usbip_dump_pipe(urb->pipe); | |
419 | + | |
420 | + dev_dbg(dev, " status :%d\n", urb->status); | |
421 | + dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags); | |
422 | + dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer); | |
423 | + dev_dbg(dev, " transfer_buffer_length:%d\n", urb->transfer_buffer_length); | |
424 | + dev_dbg(dev, " actual_length :%d\n", urb->actual_length); | |
425 | + dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet); | |
426 | + | |
427 | + if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL) | |
428 | + usbip_dump_usb_ctrlrequest( | |
429 | + (struct usb_ctrlrequest *)urb->setup_packet); | |
430 | + | |
431 | + dev_dbg(dev, " start_frame :%d\n", urb->start_frame); | |
432 | + dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets); | |
433 | + dev_dbg(dev, " interval :%d\n", urb->interval); | |
434 | + dev_dbg(dev, " error_count :%d\n", urb->error_count); | |
435 | + dev_dbg(dev, " context :%p\n", urb->context); | |
436 | + dev_dbg(dev, " complete :%p\n", urb->complete); | |
437 | +} | |
438 | +EXPORT_SYMBOL_GPL(usbip_dump_urb); | |
439 | + | |
440 | +void usbip_dump_header(struct usbip_header *pdu) | |
441 | +{ | |
442 | + udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n", | |
443 | + pdu->base.command, | |
444 | + pdu->base.seqnum, | |
445 | + pdu->base.devid, | |
446 | + pdu->base.direction, | |
447 | + pdu->base.ep); | |
448 | + | |
449 | + switch (pdu->base.command) { | |
450 | + case USBIP_CMD_SUBMIT: | |
451 | + udbg("CMD_SUBMIT: x_flags %u x_len %u sf %u #p %u iv %u\n", | |
452 | + pdu->u.cmd_submit.transfer_flags, | |
453 | + pdu->u.cmd_submit.transfer_buffer_length, | |
454 | + pdu->u.cmd_submit.start_frame, | |
455 | + pdu->u.cmd_submit.number_of_packets, | |
456 | + pdu->u.cmd_submit.interval); | |
457 | + break; | |
458 | + case USBIP_CMD_UNLINK: | |
459 | + udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum); | |
460 | + break; | |
461 | + case USBIP_RET_SUBMIT: | |
462 | + udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n", | |
463 | + pdu->u.ret_submit.status, | |
464 | + pdu->u.ret_submit.actual_length, | |
465 | + pdu->u.ret_submit.start_frame, | |
466 | + pdu->u.ret_submit.error_count); | |
467 | + case USBIP_RET_UNLINK: | |
468 | + udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status); | |
469 | + break; | |
470 | + default: | |
471 | + /* NOT REACHED */ | |
472 | + udbg("UNKNOWN\n"); | |
473 | + } | |
474 | +} | |
475 | +EXPORT_SYMBOL_GPL(usbip_dump_header); | |
476 | + | |
477 | + | |
478 | +/*-------------------------------------------------------------------------*/ | |
479 | +/* thread routines */ | |
480 | + | |
481 | +int usbip_thread(void *param) | |
482 | +{ | |
483 | + struct usbip_task *ut = param; | |
484 | + | |
485 | + if (!ut) | |
486 | + return -EINVAL; | |
487 | + | |
488 | + lock_kernel(); | |
489 | + daemonize(ut->name); | |
490 | + allow_signal(SIGKILL); | |
491 | + ut->thread = current; | |
492 | + unlock_kernel(); | |
493 | + | |
494 | + /* srv.rb must wait for rx_thread starting */ | |
495 | + complete(&ut->thread_done); | |
496 | + | |
497 | + /* start of while loop */ | |
498 | + ut->loop_ops(ut); | |
499 | + | |
500 | + /* end of loop */ | |
501 | + ut->thread = NULL; | |
502 | + | |
503 | + complete_and_exit(&ut->thread_done, 0); | |
504 | +} | |
505 | + | |
506 | +void usbip_start_threads(struct usbip_device *ud) | |
507 | +{ | |
508 | + /* | |
509 | + * threads are invoked per one device (per one connection). | |
510 | + */ | |
511 | + kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0); | |
512 | + kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0); | |
513 | + | |
514 | + /* confirm threads are starting */ | |
515 | + wait_for_completion(&ud->tcp_rx.thread_done); | |
516 | + wait_for_completion(&ud->tcp_tx.thread_done); | |
517 | +} | |
518 | +EXPORT_SYMBOL_GPL(usbip_start_threads); | |
519 | + | |
520 | +void usbip_stop_threads(struct usbip_device *ud) | |
521 | +{ | |
522 | + /* kill threads related to this sdev, if v.c. exists */ | |
523 | + if (ud->tcp_rx.thread != NULL) { | |
524 | + send_sig(SIGKILL, ud->tcp_rx.thread, 1); | |
525 | + wait_for_completion(&ud->tcp_rx.thread_done); | |
526 | + udbg("rx_thread for ud %p has finished\n", ud); | |
527 | + } | |
528 | + | |
529 | + if (ud->tcp_tx.thread != NULL) { | |
530 | + send_sig(SIGKILL, ud->tcp_tx.thread, 1); | |
531 | + wait_for_completion(&ud->tcp_tx.thread_done); | |
532 | + udbg("tx_thread for ud %p has finished\n", ud); | |
533 | + } | |
534 | +} | |
535 | +EXPORT_SYMBOL_GPL(usbip_stop_threads); | |
536 | + | |
537 | +void usbip_task_init(struct usbip_task *ut, char *name, | |
538 | + void (*loop_ops)(struct usbip_task *)) | |
539 | +{ | |
540 | + ut->thread = NULL; | |
541 | + init_completion(&ut->thread_done); | |
542 | + ut->name = name; | |
543 | + ut->loop_ops = loop_ops; | |
544 | +} | |
545 | +EXPORT_SYMBOL_GPL(usbip_task_init); | |
546 | + | |
547 | + | |
548 | +/*-------------------------------------------------------------------------*/ | |
549 | +/* socket routines */ | |
550 | + | |
551 | + /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */ | |
552 | +int usbip_xmit(int send, struct socket *sock, char *buf, | |
553 | + int size, int msg_flags) | |
554 | +{ | |
555 | + int result; | |
556 | + struct msghdr msg; | |
557 | + struct kvec iov; | |
558 | + int total = 0; | |
559 | + | |
560 | + /* for blocks of if (dbg_flag_xmit) */ | |
561 | + char *bp = buf; | |
562 | + int osize = size; | |
563 | + | |
564 | + dbg_xmit("enter\n"); | |
565 | + | |
566 | + if (!sock || !buf || !size) { | |
567 | + printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n", | |
568 | + __func__, sock, buf, size); | |
569 | + return -EINVAL; | |
570 | + } | |
571 | + | |
572 | + | |
573 | + if (dbg_flag_xmit) { | |
574 | + if (send) { | |
575 | + if (!in_interrupt()) | |
576 | + printk(KERN_DEBUG "%-10s:", current->comm); | |
577 | + else | |
578 | + printk(KERN_DEBUG "interupt :"); | |
579 | + | |
580 | + printk("%s: sending... , sock %p, buf %p, " | |
581 | + "size %d, msg_flags %d\n", __func__, | |
582 | + sock, buf, size, msg_flags); | |
583 | + usbip_dump_buffer(buf, size); | |
584 | + } | |
585 | + } | |
586 | + | |
587 | + | |
588 | + do { | |
589 | + sock->sk->sk_allocation = GFP_NOIO; | |
590 | + iov.iov_base = buf; | |
591 | + iov.iov_len = size; | |
592 | + msg.msg_name = NULL; | |
593 | + msg.msg_namelen = 0; | |
594 | + msg.msg_control = NULL; | |
595 | + msg.msg_controllen = 0; | |
596 | + msg.msg_namelen = 0; | |
597 | + msg.msg_flags = msg_flags | MSG_NOSIGNAL; | |
598 | + | |
599 | + if (send) | |
600 | + result = kernel_sendmsg(sock, &msg, &iov, 1, size); | |
601 | + else | |
602 | + result = kernel_recvmsg(sock, &msg, &iov, 1, size, | |
603 | + MSG_WAITALL); | |
604 | + | |
605 | + if (result <= 0) { | |
606 | + udbg("usbip_xmit: %s sock %p buf %p size %u ret %d" | |
607 | + " total %d\n", | |
608 | + send ? "send" : "receive", sock, buf, | |
609 | + size, result, total); | |
610 | + goto err; | |
611 | + } | |
612 | + | |
613 | + size -= result; | |
614 | + buf += result; | |
615 | + total += result; | |
616 | + | |
617 | + } while (size > 0); | |
618 | + | |
619 | + | |
620 | + if (dbg_flag_xmit) { | |
621 | + if (!send) { | |
622 | + if (!in_interrupt()) | |
623 | + printk(KERN_DEBUG "%-10s:", current->comm); | |
624 | + else | |
625 | + printk(KERN_DEBUG "interupt :"); | |
626 | + | |
627 | + printk("usbip_xmit: receiving....\n"); | |
628 | + usbip_dump_buffer(bp, osize); | |
629 | + printk("usbip_xmit: received, osize %d ret %d size %d " | |
630 | + "total %d\n", osize, result, size, | |
631 | + total); | |
632 | + } | |
633 | + | |
634 | + if (send) | |
635 | + printk("usbip_xmit: send, total %d\n", total); | |
636 | + } | |
637 | + | |
638 | + return total; | |
639 | + | |
640 | +err: | |
641 | + return result; | |
642 | +} | |
643 | +EXPORT_SYMBOL_GPL(usbip_xmit); | |
644 | + | |
645 | + | |
646 | +/* now a usrland utility should set options. */ | |
647 | +#if 0 | |
648 | +int setquickack(struct socket *socket) | |
649 | +{ | |
650 | + mm_segment_t oldfs; | |
651 | + int val = 1; | |
652 | + int ret; | |
653 | + | |
654 | + oldfs = get_fs(); | |
655 | + set_fs(get_ds()); | |
656 | + ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK, | |
657 | + (char __user *) &val, sizeof(ret)); | |
658 | + set_fs(oldfs); | |
659 | + | |
660 | + return ret; | |
661 | +} | |
662 | + | |
663 | +int setnodelay(struct socket *socket) | |
664 | +{ | |
665 | + mm_segment_t oldfs; | |
666 | + int val = 1; | |
667 | + int ret; | |
668 | + | |
669 | + oldfs = get_fs(); | |
670 | + set_fs(get_ds()); | |
671 | + ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY, | |
672 | + (char __user *) &val, sizeof(ret)); | |
673 | + set_fs(oldfs); | |
674 | + | |
675 | + return ret; | |
676 | +} | |
677 | + | |
678 | +int setkeepalive(struct socket *socket) | |
679 | +{ | |
680 | + mm_segment_t oldfs; | |
681 | + int val = 1; | |
682 | + int ret; | |
683 | + | |
684 | + oldfs = get_fs(); | |
685 | + set_fs(get_ds()); | |
686 | + ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE, | |
687 | + (char __user *) &val, sizeof(ret)); | |
688 | + set_fs(oldfs); | |
689 | + | |
690 | + return ret; | |
691 | +} | |
692 | + | |
693 | +void setreuse(struct socket *socket) | |
694 | +{ | |
695 | + socket->sk->sk_reuse = 1; | |
696 | +} | |
697 | +#endif | |
698 | + | |
699 | +struct socket *sockfd_to_socket(unsigned int sockfd) | |
700 | +{ | |
701 | + struct socket *socket; | |
702 | + struct file *file; | |
703 | + struct inode *inode; | |
704 | + | |
705 | + file = fget(sockfd); | |
706 | + if (!file) { | |
707 | + printk(KERN_ERR "%s: invalid sockfd\n", __func__); | |
708 | + return NULL; | |
709 | + } | |
710 | + | |
711 | + inode = file->f_dentry->d_inode; | |
712 | + | |
713 | + if (!inode || !S_ISSOCK(inode->i_mode)) | |
714 | + return NULL; | |
715 | + | |
716 | + socket = SOCKET_I(inode); | |
717 | + | |
718 | + return socket; | |
719 | +} | |
720 | +EXPORT_SYMBOL_GPL(sockfd_to_socket); | |
721 | + | |
722 | + | |
723 | + | |
724 | +/*-------------------------------------------------------------------------*/ | |
725 | +/* pdu routines */ | |
726 | + | |
727 | +/* there may be more cases to tweak the flags. */ | |
728 | +static unsigned int tweak_transfer_flags(unsigned int flags) | |
729 | +{ | |
730 | + | |
731 | + if (flags & URB_NO_TRANSFER_DMA_MAP) | |
732 | + /* | |
733 | + * vhci_hcd does not provide DMA-mapped I/O. The upper | |
734 | + * driver does not need to set this flag. The remote | |
735 | + * usbip.ko does not still perform DMA-mapped I/O for | |
736 | + * DMA-caplable host controllers. So, clear this flag. | |
737 | + */ | |
738 | + flags &= ~URB_NO_TRANSFER_DMA_MAP; | |
739 | + | |
740 | + if (flags & URB_NO_SETUP_DMA_MAP) | |
741 | + flags &= ~URB_NO_SETUP_DMA_MAP; | |
742 | + | |
743 | + return flags; | |
744 | +} | |
745 | + | |
746 | +static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb, | |
747 | + int pack) | |
748 | +{ | |
749 | + struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit; | |
750 | + | |
751 | + /* | |
752 | + * Some members are not still implemented in usbip. I hope this issue | |
753 | + * will be discussed when usbip is ported to other operating systems. | |
754 | + */ | |
755 | + if (pack) { | |
756 | + /* vhci_tx.c */ | |
757 | + spdu->transfer_flags = | |
758 | + tweak_transfer_flags(urb->transfer_flags); | |
759 | + spdu->transfer_buffer_length = urb->transfer_buffer_length; | |
760 | + spdu->start_frame = urb->start_frame; | |
761 | + spdu->number_of_packets = urb->number_of_packets; | |
762 | + spdu->interval = urb->interval; | |
763 | + } else { | |
764 | + /* stub_rx.c */ | |
765 | + urb->transfer_flags = spdu->transfer_flags; | |
766 | + | |
767 | + urb->transfer_buffer_length = spdu->transfer_buffer_length; | |
768 | + urb->start_frame = spdu->start_frame; | |
769 | + urb->number_of_packets = spdu->number_of_packets; | |
770 | + urb->interval = spdu->interval; | |
771 | + } | |
772 | +} | |
773 | + | |
774 | +static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb, | |
775 | + int pack) | |
776 | +{ | |
777 | + struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit; | |
778 | + | |
779 | + if (pack) { | |
780 | + /* stub_tx.c */ | |
781 | + | |
782 | + rpdu->status = urb->status; | |
783 | + rpdu->actual_length = urb->actual_length; | |
784 | + rpdu->start_frame = urb->start_frame; | |
785 | + rpdu->error_count = urb->error_count; | |
786 | + } else { | |
787 | + /* vhci_rx.c */ | |
788 | + | |
789 | + urb->status = rpdu->status; | |
790 | + urb->actual_length = rpdu->actual_length; | |
791 | + urb->start_frame = rpdu->start_frame; | |
792 | + urb->error_count = rpdu->error_count; | |
793 | + } | |
794 | +} | |
795 | + | |
796 | + | |
797 | +void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd, | |
798 | + int pack) | |
799 | +{ | |
800 | + switch (cmd) { | |
801 | + case USBIP_CMD_SUBMIT: | |
802 | + usbip_pack_cmd_submit(pdu, urb, pack); | |
803 | + break; | |
804 | + case USBIP_RET_SUBMIT: | |
805 | + usbip_pack_ret_submit(pdu, urb, pack); | |
806 | + break; | |
807 | + default: | |
808 | + err("unknown command"); | |
809 | + /* NOTREACHED */ | |
810 | + /* BUG(); */ | |
811 | + } | |
812 | +} | |
813 | +EXPORT_SYMBOL_GPL(usbip_pack_pdu); | |
814 | + | |
815 | + | |
816 | +static void correct_endian_basic(struct usbip_header_basic *base, int send) | |
817 | +{ | |
818 | + if (send) { | |
819 | + base->command = cpu_to_be32(base->command); | |
820 | + base->seqnum = cpu_to_be32(base->seqnum); | |
821 | + base->devid = cpu_to_be32(base->devid); | |
822 | + base->direction = cpu_to_be32(base->direction); | |
823 | + base->ep = cpu_to_be32(base->ep); | |
824 | + } else { | |
825 | + base->command = be32_to_cpu(base->command); | |
826 | + base->seqnum = be32_to_cpu(base->seqnum); | |
827 | + base->devid = be32_to_cpu(base->devid); | |
828 | + base->direction = be32_to_cpu(base->direction); | |
829 | + base->ep = be32_to_cpu(base->ep); | |
830 | + } | |
831 | +} | |
832 | + | |
833 | +static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu, | |
834 | + int send) | |
835 | +{ | |
836 | + if (send) { | |
837 | + pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags); | |
838 | + | |
839 | + cpu_to_be32s(&pdu->transfer_buffer_length); | |
840 | + cpu_to_be32s(&pdu->start_frame); | |
841 | + cpu_to_be32s(&pdu->number_of_packets); | |
842 | + cpu_to_be32s(&pdu->interval); | |
843 | + } else { | |
844 | + pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags); | |
845 | + | |
846 | + be32_to_cpus(&pdu->transfer_buffer_length); | |
847 | + be32_to_cpus(&pdu->start_frame); | |
848 | + be32_to_cpus(&pdu->number_of_packets); | |
849 | + be32_to_cpus(&pdu->interval); | |
850 | + } | |
851 | +} | |
852 | + | |
853 | +static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu, | |
854 | + int send) | |
855 | +{ | |
856 | + if (send) { | |
857 | + cpu_to_be32s(&pdu->status); | |
858 | + cpu_to_be32s(&pdu->actual_length); | |
859 | + cpu_to_be32s(&pdu->start_frame); | |
860 | + cpu_to_be32s(&pdu->error_count); | |
861 | + } else { | |
862 | + be32_to_cpus(&pdu->status); | |
863 | + be32_to_cpus(&pdu->actual_length); | |
864 | + be32_to_cpus(&pdu->start_frame); | |
865 | + be32_to_cpus(&pdu->error_count); | |
866 | + } | |
867 | +} | |
868 | + | |
869 | +static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu, | |
870 | + int send) | |
871 | +{ | |
872 | + if (send) | |
873 | + pdu->seqnum = cpu_to_be32(pdu->seqnum); | |
874 | + else | |
875 | + pdu->seqnum = be32_to_cpu(pdu->seqnum); | |
876 | +} | |
877 | + | |
878 | +static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu, | |
879 | + int send) | |
880 | +{ | |
881 | + if (send) | |
882 | + cpu_to_be32s(&pdu->status); | |
883 | + else | |
884 | + be32_to_cpus(&pdu->status); | |
885 | +} | |
886 | + | |
887 | +void usbip_header_correct_endian(struct usbip_header *pdu, int send) | |
888 | +{ | |
889 | + __u32 cmd = 0; | |
890 | + | |
891 | + if (send) | |
892 | + cmd = pdu->base.command; | |
893 | + | |
894 | + correct_endian_basic(&pdu->base, send); | |
895 | + | |
896 | + if (!send) | |
897 | + cmd = pdu->base.command; | |
898 | + | |
899 | + switch (cmd) { | |
900 | + case USBIP_CMD_SUBMIT: | |
901 | + correct_endian_cmd_submit(&pdu->u.cmd_submit, send); | |
902 | + break; | |
903 | + case USBIP_RET_SUBMIT: | |
904 | + correct_endian_ret_submit(&pdu->u.ret_submit, send); | |
905 | + break; | |
906 | + case USBIP_CMD_UNLINK: | |
907 | + correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send); | |
908 | + break; | |
909 | + case USBIP_RET_UNLINK: | |
910 | + correct_endian_ret_unlink(&pdu->u.ret_unlink, send); | |
911 | + break; | |
912 | + default: | |
913 | + /* NOTREACHED */ | |
914 | + err("unknown command in pdu header: %d", cmd); | |
915 | + /* BUG(); */ | |
916 | + } | |
917 | +} | |
918 | +EXPORT_SYMBOL_GPL(usbip_header_correct_endian); | |
919 | + | |
920 | +static void usbip_iso_pakcet_correct_endian( | |
921 | + struct usbip_iso_packet_descriptor *iso, | |
922 | + int send) | |
923 | +{ | |
924 | + /* does not need all members. but copy all simply. */ | |
925 | + if (send) { | |
926 | + iso->offset = cpu_to_be32(iso->offset); | |
927 | + iso->length = cpu_to_be32(iso->length); | |
928 | + iso->status = cpu_to_be32(iso->status); | |
929 | + iso->actual_length = cpu_to_be32(iso->actual_length); | |
930 | + } else { | |
931 | + iso->offset = be32_to_cpu(iso->offset); | |
932 | + iso->length = be32_to_cpu(iso->length); | |
933 | + iso->status = be32_to_cpu(iso->status); | |
934 | + iso->actual_length = be32_to_cpu(iso->actual_length); | |
935 | + } | |
936 | +} | |
937 | + | |
938 | +static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso, | |
939 | + struct usb_iso_packet_descriptor *uiso, int pack) | |
940 | +{ | |
941 | + if (pack) { | |
942 | + iso->offset = uiso->offset; | |
943 | + iso->length = uiso->length; | |
944 | + iso->status = uiso->status; | |
945 | + iso->actual_length = uiso->actual_length; | |
946 | + } else { | |
947 | + uiso->offset = iso->offset; | |
948 | + uiso->length = iso->length; | |
949 | + uiso->status = iso->status; | |
950 | + uiso->actual_length = iso->actual_length; | |
951 | + } | |
952 | +} | |
953 | + | |
954 | + | |
955 | +/* must free buffer */ | |
956 | +void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen) | |
957 | +{ | |
958 | + void *buff; | |
959 | + struct usbip_iso_packet_descriptor *iso; | |
960 | + int np = urb->number_of_packets; | |
961 | + ssize_t size = np * sizeof(*iso); | |
962 | + int i; | |
963 | + | |
964 | + buff = kzalloc(size, GFP_KERNEL); | |
965 | + if (!buff) | |
966 | + return NULL; | |
967 | + | |
968 | + for (i = 0; i < np; i++) { | |
969 | + iso = buff + (i * sizeof(*iso)); | |
970 | + | |
971 | + usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1); | |
972 | + usbip_iso_pakcet_correct_endian(iso, 1); | |
973 | + } | |
974 | + | |
975 | + *bufflen = size; | |
976 | + | |
977 | + return buff; | |
978 | +} | |
979 | +EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu); | |
980 | + | |
981 | +/* some members of urb must be substituted before. */ | |
982 | +int usbip_recv_iso(struct usbip_device *ud, struct urb *urb) | |
983 | +{ | |
984 | + void *buff; | |
985 | + struct usbip_iso_packet_descriptor *iso; | |
986 | + int np = urb->number_of_packets; | |
987 | + int size = np * sizeof(*iso); | |
988 | + int i; | |
989 | + int ret; | |
990 | + | |
991 | + if (!usb_pipeisoc(urb->pipe)) | |
992 | + return 0; | |
993 | + | |
994 | + /* my Bluetooth dongle gets ISO URBs which are np = 0 */ | |
995 | + if (np == 0) { | |
996 | + /* uinfo("iso np == 0\n"); */ | |
997 | + /* usbip_dump_urb(urb); */ | |
998 | + return 0; | |
999 | + } | |
1000 | + | |
1001 | + buff = kzalloc(size, GFP_KERNEL); | |
1002 | + if (!buff) | |
1003 | + return -ENOMEM; | |
1004 | + | |
1005 | + ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0); | |
1006 | + if (ret != size) { | |
1007 | + dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n", | |
1008 | + ret); | |
1009 | + kfree(buff); | |
1010 | + | |
1011 | + if (ud->side == USBIP_STUB) | |
1012 | + usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | |
1013 | + else | |
1014 | + usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
1015 | + | |
1016 | + return -EPIPE; | |
1017 | + } | |
1018 | + | |
1019 | + for (i = 0; i < np; i++) { | |
1020 | + iso = buff + (i * sizeof(*iso)); | |
1021 | + | |
1022 | + usbip_iso_pakcet_correct_endian(iso, 0); | |
1023 | + usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0); | |
1024 | + } | |
1025 | + | |
1026 | + | |
1027 | + kfree(buff); | |
1028 | + | |
1029 | + return ret; | |
1030 | +} | |
1031 | +EXPORT_SYMBOL_GPL(usbip_recv_iso); | |
1032 | + | |
1033 | + | |
1034 | +/* some members of urb must be substituted before. */ | |
1035 | +int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb) | |
1036 | +{ | |
1037 | + int ret; | |
1038 | + int size; | |
1039 | + | |
1040 | + if (ud->side == USBIP_STUB) { | |
1041 | + /* stub_rx.c */ | |
1042 | + /* the direction of urb must be OUT. */ | |
1043 | + if (usb_pipein(urb->pipe)) | |
1044 | + return 0; | |
1045 | + | |
1046 | + size = urb->transfer_buffer_length; | |
1047 | + } else { | |
1048 | + /* vhci_rx.c */ | |
1049 | + /* the direction of urb must be IN. */ | |
1050 | + if (usb_pipeout(urb->pipe)) | |
1051 | + return 0; | |
1052 | + | |
1053 | + size = urb->actual_length; | |
1054 | + } | |
1055 | + | |
1056 | + /* no need to recv xbuff */ | |
1057 | + if (!(size > 0)) | |
1058 | + return 0; | |
1059 | + | |
1060 | + ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer, | |
1061 | + size, 0); | |
1062 | + if (ret != size) { | |
1063 | + dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret); | |
1064 | + if (ud->side == USBIP_STUB) { | |
1065 | + usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | |
1066 | + } else { | |
1067 | + usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
1068 | + return -EPIPE; | |
1069 | + } | |
1070 | + } | |
1071 | + | |
1072 | + return ret; | |
1073 | +} | |
1074 | +EXPORT_SYMBOL_GPL(usbip_recv_xbuff); | |
1075 | + | |
1076 | + | |
1077 | +/*-------------------------------------------------------------------------*/ | |
1078 | + | |
1079 | +static int __init usbip_common_init(void) | |
1080 | +{ | |
1081 | + printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION); | |
1082 | + | |
1083 | + return 0; | |
1084 | +} | |
1085 | + | |
1086 | +static void __exit usbip_common_exit(void) | |
1087 | +{ | |
1088 | + return; | |
1089 | +} | |
1090 | + | |
1091 | + | |
1092 | + | |
1093 | + | |
1094 | +module_init(usbip_common_init); | |
1095 | +module_exit(usbip_common_exit); | |
1096 | + | |
1097 | +MODULE_AUTHOR(DRIVER_AUTHOR); | |
1098 | +MODULE_DESCRIPTION(DRIVER_DESC); | |
1099 | +MODULE_LICENSE("GPL"); | |
1100 | diff --git a/drivers/staging/usbip/usbip_common.h b/drivers/staging/usbip/usbip_common.h | |
1101 | new file mode 100644 | |
1102 | index 0000000..b0186b7 | |
1103 | --- /dev/null | |
1104 | +++ b/drivers/staging/usbip/usbip_common.h | |
1105 | @@ -0,0 +1,406 @@ | |
1106 | +/* | |
1107 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
1108 | + * | |
1109 | + * This is free software; you can redistribute it and/or modify | |
1110 | + * it under the terms of the GNU General Public License as published by | |
1111 | + * the Free Software Foundation; either version 2 of the License, or | |
1112 | + * (at your option) any later version. | |
1113 | + * | |
1114 | + * This is distributed in the hope that it will be useful, | |
1115 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
1116 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
1117 | + * GNU General Public License for more details. | |
1118 | + * | |
1119 | + * You should have received a copy of the GNU General Public License | |
1120 | + * along with this program; if not, write to the Free Software | |
1121 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
1122 | + * USA. | |
1123 | + */ | |
1124 | + | |
1125 | +#ifndef __VHCI_COMMON_H | |
1126 | +#define __VHCI_COMMON_H | |
1127 | + | |
1128 | + | |
1129 | +#include <linux/version.h> | |
1130 | +#include <linux/usb.h> | |
1131 | +#include <asm/byteorder.h> | |
1132 | +#include <net/sock.h> | |
1133 | + | |
1134 | +/*-------------------------------------------------------------------------*/ | |
1135 | + | |
1136 | +/* | |
1137 | + * define macros to print messages | |
1138 | + */ | |
1139 | + | |
1140 | +/** | |
1141 | + * udbg - print debug messages if CONFIG_USB_DEBUG is defined | |
1142 | + * @fmt: | |
1143 | + * @args: | |
1144 | + */ | |
1145 | + | |
1146 | +#ifdef CONFIG_USB_DEBUG | |
1147 | + | |
1148 | +#define udbg(fmt, args...) \ | |
1149 | + do { \ | |
1150 | + printk(KERN_DEBUG "%-10s:(%s,%d) %s: " fmt, \ | |
1151 | + (in_interrupt() ? "interrupt" : (current)->comm),\ | |
1152 | + __FILE__, __LINE__, __func__, ##args); \ | |
1153 | + } while (0) | |
1154 | + | |
1155 | +#else /* CONFIG_USB_DEBUG */ | |
1156 | + | |
1157 | +#define udbg(fmt, args...) do { } while (0) | |
1158 | + | |
1159 | +#endif /* CONFIG_USB_DEBUG */ | |
1160 | + | |
1161 | + | |
1162 | +enum { | |
1163 | + usbip_debug_xmit = (1 << 0), | |
1164 | + usbip_debug_sysfs = (1 << 1), | |
1165 | + usbip_debug_urb = (1 << 2), | |
1166 | + usbip_debug_eh = (1 << 3), | |
1167 | + | |
1168 | + usbip_debug_stub_cmp = (1 << 8), | |
1169 | + usbip_debug_stub_dev = (1 << 9), | |
1170 | + usbip_debug_stub_rx = (1 << 10), | |
1171 | + usbip_debug_stub_tx = (1 << 11), | |
1172 | + | |
1173 | + usbip_debug_vhci_rh = (1 << 8), | |
1174 | + usbip_debug_vhci_hc = (1 << 9), | |
1175 | + usbip_debug_vhci_rx = (1 << 10), | |
1176 | + usbip_debug_vhci_tx = (1 << 11), | |
1177 | + usbip_debug_vhci_sysfs = (1 << 12) | |
1178 | +}; | |
1179 | + | |
1180 | +#define dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit) | |
1181 | +#define dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh) | |
1182 | +#define dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc) | |
1183 | +#define dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx) | |
1184 | +#define dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx) | |
1185 | +#define dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs) | |
1186 | +#define dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx) | |
1187 | +#define dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx) | |
1188 | + | |
1189 | +extern unsigned long usbip_debug_flag; | |
1190 | +extern struct device_attribute dev_attr_usbip_debug; | |
1191 | + | |
1192 | +#define dbg_with_flag(flag, fmt, args...) \ | |
1193 | + do { \ | |
1194 | + if (flag & usbip_debug_flag) \ | |
1195 | + udbg(fmt , ##args); \ | |
1196 | + } while (0) | |
1197 | + | |
1198 | +#define dbg_sysfs(fmt, args...) \ | |
1199 | + dbg_with_flag(usbip_debug_sysfs, fmt , ##args) | |
1200 | +#define dbg_xmit(fmt, args...) \ | |
1201 | + dbg_with_flag(usbip_debug_xmit, fmt , ##args) | |
1202 | +#define dbg_urb(fmt, args...) \ | |
1203 | + dbg_with_flag(usbip_debug_urb, fmt , ##args) | |
1204 | +#define dbg_eh(fmt, args...) \ | |
1205 | + dbg_with_flag(usbip_debug_eh, fmt , ##args) | |
1206 | + | |
1207 | +#define dbg_vhci_rh(fmt, args...) \ | |
1208 | + dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args) | |
1209 | +#define dbg_vhci_hc(fmt, args...) \ | |
1210 | + dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args) | |
1211 | +#define dbg_vhci_rx(fmt, args...) \ | |
1212 | + dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args) | |
1213 | +#define dbg_vhci_tx(fmt, args...) \ | |
1214 | + dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args) | |
1215 | +#define dbg_vhci_sysfs(fmt, args...) \ | |
1216 | + dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args) | |
1217 | + | |
1218 | +#define dbg_stub_cmp(fmt, args...) \ | |
1219 | + dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args) | |
1220 | +#define dbg_stub_rx(fmt, args...) \ | |
1221 | + dbg_with_flag(usbip_debug_stub_rx, fmt , ##args) | |
1222 | +#define dbg_stub_tx(fmt, args...) \ | |
1223 | + dbg_with_flag(usbip_debug_stub_tx, fmt , ##args) | |
1224 | + | |
1225 | + | |
1226 | +/** | |
1227 | + * uerr - print error messages | |
1228 | + * @fmt: | |
1229 | + * @args: | |
1230 | + */ | |
1231 | +#define uerr(fmt, args...) \ | |
1232 | + do { \ | |
1233 | + printk(KERN_ERR "%-10s: ***ERROR*** (%s,%d) %s: " fmt, \ | |
1234 | + (in_interrupt() ? "interrupt" : (current)->comm),\ | |
1235 | + __FILE__, __LINE__, __func__, ##args); \ | |
1236 | + } while (0) | |
1237 | + | |
1238 | +/** | |
1239 | + * uinfo - print information messages | |
1240 | + * @fmt: | |
1241 | + * @args: | |
1242 | + */ | |
1243 | +#define uinfo(fmt, args...) \ | |
1244 | + do { \ | |
1245 | + printk(KERN_INFO "usbip: " fmt , ## args); \ | |
1246 | + } while (0) | |
1247 | + | |
1248 | + | |
1249 | +/*-------------------------------------------------------------------------*/ | |
1250 | + | |
1251 | +/* | |
1252 | + * USB/IP request headers. | |
1253 | + * Currently, we define 4 request types: | |
1254 | + * | |
1255 | + * - CMD_SUBMIT transfers a USB request, corresponding to usb_submit_urb(). | |
1256 | + * (client to server) | |
1257 | + * - RET_RETURN transfers the result of CMD_SUBMIT. | |
1258 | + * (server to client) | |
1259 | + * - CMD_UNLINK transfers an unlink request of a pending USB request. | |
1260 | + * (client to server) | |
1261 | + * - RET_UNLINK transfers the result of CMD_UNLINK. | |
1262 | + * (server to client) | |
1263 | + * | |
1264 | + * Note: The below request formats are based on the USB subsystem of Linux. Its | |
1265 | + * details will be defined when other implementations come. | |
1266 | + * | |
1267 | + * | |
1268 | + */ | |
1269 | + | |
1270 | +/* | |
1271 | + * A basic header followed by other additional headers. | |
1272 | + */ | |
1273 | +struct usbip_header_basic { | |
1274 | +#define USBIP_CMD_SUBMIT 0x0001 | |
1275 | +#define USBIP_CMD_UNLINK 0x0002 | |
1276 | +#define USBIP_RET_SUBMIT 0x0003 | |
1277 | +#define USBIP_RET_UNLINK 0x0004 | |
1278 | + __u32 command; | |
1279 | + | |
1280 | + /* sequencial number which identifies requests. | |
1281 | + * incremented per connections */ | |
1282 | + __u32 seqnum; | |
1283 | + | |
1284 | + /* devid is used to specify a remote USB device uniquely instead | |
1285 | + * of busnum and devnum in Linux. In the case of Linux stub_driver, | |
1286 | + * this value is ((busnum << 16) | devnum) */ | |
1287 | + __u32 devid; | |
1288 | + | |
1289 | +#define USBIP_DIR_OUT 0 | |
1290 | +#define USBIP_DIR_IN 1 | |
1291 | + __u32 direction; | |
1292 | + __u32 ep; /* endpoint number */ | |
1293 | +} __attribute__ ((packed)); | |
1294 | + | |
1295 | +/* | |
1296 | + * An additional header for a CMD_SUBMIT packet. | |
1297 | + */ | |
1298 | +struct usbip_header_cmd_submit { | |
1299 | + /* these values are basically the same as in a URB. */ | |
1300 | + | |
1301 | + /* the same in a URB. */ | |
1302 | + __u32 transfer_flags; | |
1303 | + | |
1304 | + /* set the following data size (out), | |
1305 | + * or expected reading data size (in) */ | |
1306 | + __s32 transfer_buffer_length; | |
1307 | + | |
1308 | + /* it is difficult for usbip to sync frames (reserved only?) */ | |
1309 | + __s32 start_frame; | |
1310 | + | |
1311 | + /* the number of iso descriptors that follows this header */ | |
1312 | + __s32 number_of_packets; | |
1313 | + | |
1314 | + /* the maximum time within which this request works in a host | |
1315 | + * controller of a server side */ | |
1316 | + __s32 interval; | |
1317 | + | |
1318 | + /* set setup packet data for a CTRL request */ | |
1319 | + unsigned char setup[8]; | |
1320 | +} __attribute__ ((packed)); | |
1321 | + | |
1322 | +/* | |
1323 | + * An additional header for a RET_SUBMIT packet. | |
1324 | + */ | |
1325 | +struct usbip_header_ret_submit { | |
1326 | + __s32 status; | |
1327 | + __s32 actual_length; /* returned data length */ | |
1328 | + __s32 start_frame; /* ISO and INT */ | |
1329 | + __s32 number_of_packets; /* ISO only */ | |
1330 | + __s32 error_count; /* ISO only */ | |
1331 | +} __attribute__ ((packed)); | |
1332 | + | |
1333 | +/* | |
1334 | + * An additional header for a CMD_UNLINK packet. | |
1335 | + */ | |
1336 | +struct usbip_header_cmd_unlink { | |
1337 | + __u32 seqnum; /* URB's seqnum which will be unlinked */ | |
1338 | +} __attribute__ ((packed)); | |
1339 | + | |
1340 | + | |
1341 | +/* | |
1342 | + * An additional header for a RET_UNLINK packet. | |
1343 | + */ | |
1344 | +struct usbip_header_ret_unlink { | |
1345 | + __s32 status; | |
1346 | +} __attribute__ ((packed)); | |
1347 | + | |
1348 | + | |
1349 | +/* the same as usb_iso_packet_descriptor but packed for pdu */ | |
1350 | +struct usbip_iso_packet_descriptor { | |
1351 | + __u32 offset; | |
1352 | + __u32 length; /* expected length */ | |
1353 | + __u32 actual_length; | |
1354 | + __u32 status; | |
1355 | +} __attribute__ ((packed)); | |
1356 | + | |
1357 | + | |
1358 | +/* | |
1359 | + * All usbip packets use a common header to keep code simple. | |
1360 | + */ | |
1361 | +struct usbip_header { | |
1362 | + struct usbip_header_basic base; | |
1363 | + | |
1364 | + union { | |
1365 | + struct usbip_header_cmd_submit cmd_submit; | |
1366 | + struct usbip_header_ret_submit ret_submit; | |
1367 | + struct usbip_header_cmd_unlink cmd_unlink; | |
1368 | + struct usbip_header_ret_unlink ret_unlink; | |
1369 | + } u; | |
1370 | +} __attribute__ ((packed)); | |
1371 | + | |
1372 | + | |
1373 | + | |
1374 | + | |
1375 | +/*-------------------------------------------------------------------------*/ | |
1376 | + | |
1377 | + | |
1378 | +int usbip_xmit(int, struct socket *, char *, int, int); | |
1379 | +int usbip_sendmsg(struct socket *, struct msghdr *, int); | |
1380 | + | |
1381 | + | |
1382 | +static inline int interface_to_busnum(struct usb_interface *interface) | |
1383 | +{ | |
1384 | + struct usb_device *udev = interface_to_usbdev(interface); | |
1385 | + return udev->bus->busnum; | |
1386 | +} | |
1387 | + | |
1388 | +static inline int interface_to_devnum(struct usb_interface *interface) | |
1389 | +{ | |
1390 | + struct usb_device *udev = interface_to_usbdev(interface); | |
1391 | + return udev->devnum; | |
1392 | +} | |
1393 | + | |
1394 | +static inline int interface_to_infnum(struct usb_interface *interface) | |
1395 | +{ | |
1396 | + return interface->cur_altsetting->desc.bInterfaceNumber; | |
1397 | +} | |
1398 | + | |
1399 | +#if 0 | |
1400 | +int setnodelay(struct socket *); | |
1401 | +int setquickack(struct socket *); | |
1402 | +int setkeepalive(struct socket *socket); | |
1403 | +void setreuse(struct socket *); | |
1404 | +#endif | |
1405 | + | |
1406 | +struct socket *sockfd_to_socket(unsigned int); | |
1407 | +int set_sockaddr(struct socket *socket, struct sockaddr_storage *ss); | |
1408 | + | |
1409 | +void usbip_dump_urb(struct urb *purb); | |
1410 | +void usbip_dump_header(struct usbip_header *pdu); | |
1411 | + | |
1412 | + | |
1413 | +struct usbip_device; | |
1414 | + | |
1415 | +struct usbip_task { | |
1416 | + struct task_struct *thread; | |
1417 | + struct completion thread_done; | |
1418 | + char *name; | |
1419 | + void (*loop_ops)(struct usbip_task *); | |
1420 | +}; | |
1421 | + | |
1422 | +enum usbip_side { | |
1423 | + USBIP_VHCI, | |
1424 | + USBIP_STUB, | |
1425 | +}; | |
1426 | + | |
1427 | +enum usbip_status { | |
1428 | + /* sdev is available. */ | |
1429 | + SDEV_ST_AVAILABLE = 0x01, | |
1430 | + /* sdev is now used. */ | |
1431 | + SDEV_ST_USED, | |
1432 | + /* sdev is unusable because of a fatal error. */ | |
1433 | + SDEV_ST_ERROR, | |
1434 | + | |
1435 | + /* vdev does not connect a remote device. */ | |
1436 | + VDEV_ST_NULL, | |
1437 | + /* vdev is used, but the USB address is not assigned yet */ | |
1438 | + VDEV_ST_NOTASSIGNED, | |
1439 | + VDEV_ST_USED, | |
1440 | + VDEV_ST_ERROR | |
1441 | +}; | |
1442 | + | |
1443 | +/* a common structure for stub_device and vhci_device */ | |
1444 | +struct usbip_device { | |
1445 | + enum usbip_side side; | |
1446 | + | |
1447 | + enum usbip_status status; | |
1448 | + | |
1449 | + /* lock for status */ | |
1450 | + spinlock_t lock; | |
1451 | + | |
1452 | + struct socket *tcp_socket; | |
1453 | + | |
1454 | + struct usbip_task tcp_rx; | |
1455 | + struct usbip_task tcp_tx; | |
1456 | + | |
1457 | + /* event handler */ | |
1458 | +#define USBIP_EH_SHUTDOWN (1 << 0) | |
1459 | +#define USBIP_EH_BYE (1 << 1) | |
1460 | +#define USBIP_EH_RESET (1 << 2) | |
1461 | +#define USBIP_EH_UNUSABLE (1 << 3) | |
1462 | + | |
1463 | +#define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE) | |
1464 | +#define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET) | |
1465 | +#define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET) | |
1466 | +#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET) | |
1467 | +#define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE) | |
1468 | + | |
1469 | +#define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE) | |
1470 | +#define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET) | |
1471 | +#define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET) | |
1472 | +#define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE) | |
1473 | + | |
1474 | + unsigned long event; | |
1475 | + struct usbip_task eh; | |
1476 | + wait_queue_head_t eh_waitq; | |
1477 | + | |
1478 | + struct eh_ops { | |
1479 | + void (*shutdown)(struct usbip_device *); | |
1480 | + void (*reset)(struct usbip_device *); | |
1481 | + void (*unusable)(struct usbip_device *); | |
1482 | + } eh_ops; | |
1483 | +}; | |
1484 | + | |
1485 | + | |
1486 | +void usbip_task_init(struct usbip_task *ut, char *, | |
1487 | + void (*loop_ops)(struct usbip_task *)); | |
1488 | + | |
1489 | +void usbip_start_threads(struct usbip_device *ud); | |
1490 | +void usbip_stop_threads(struct usbip_device *ud); | |
1491 | +int usbip_thread(void *param); | |
1492 | + | |
1493 | +void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd, | |
1494 | + int pack); | |
1495 | + | |
1496 | +void usbip_header_correct_endian(struct usbip_header *pdu, int send); | |
1497 | +/* some members of urb must be substituted before. */ | |
1498 | +int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb); | |
1499 | +/* some members of urb must be substituted before. */ | |
1500 | +int usbip_recv_iso(struct usbip_device *ud, struct urb *urb); | |
1501 | +void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen); | |
1502 | + | |
1503 | + | |
1504 | +/* usbip_event.c */ | |
1505 | +void usbip_start_eh(struct usbip_device *ud); | |
1506 | +void usbip_stop_eh(struct usbip_device *ud); | |
1507 | +void usbip_event_add(struct usbip_device *ud, unsigned long event); | |
1508 | +int usbip_event_happend(struct usbip_device *ud); | |
1509 | + | |
1510 | + | |
1511 | +#endif | |
1512 | diff --git a/drivers/staging/usbip/usbip_event.c b/drivers/staging/usbip/usbip_event.c | |
1513 | new file mode 100644 | |
1514 | index 0000000..4318553 | |
1515 | --- /dev/null | |
1516 | +++ b/drivers/staging/usbip/usbip_event.c | |
1517 | @@ -0,0 +1,141 @@ | |
1518 | +/* | |
1519 | + * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
1520 | + * | |
1521 | + * This is free software; you can redistribute it and/or modify | |
1522 | + * it under the terms of the GNU General Public License as published by | |
1523 | + * the Free Software Foundation; either version 2 of the License, or | |
1524 | + * (at your option) any later version. | |
1525 | + * | |
1526 | + * This is distributed in the hope that it will be useful, | |
1527 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
1528 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
1529 | + * GNU General Public License for more details. | |
1530 | + * | |
1531 | + * You should have received a copy of the GNU General Public License | |
1532 | + * along with this program; if not, write to the Free Software | |
1533 | + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
1534 | + * USA. | |
1535 | + */ | |
1536 | + | |
1537 | +#include "usbip_common.h" | |
1538 | + | |
1539 | +static int event_handler(struct usbip_device *ud) | |
1540 | +{ | |
1541 | + dbg_eh("enter\n"); | |
1542 | + | |
1543 | + /* | |
1544 | + * Events are handled by only this thread. | |
1545 | + */ | |
1546 | + while (usbip_event_happend(ud)) { | |
1547 | + dbg_eh("pending event %lx\n", ud->event); | |
1548 | + | |
1549 | + /* | |
1550 | + * NOTE: shutdown must come first. | |
1551 | + * Shutdown the device. | |
1552 | + */ | |
1553 | + if (ud->event & USBIP_EH_SHUTDOWN) { | |
1554 | + ud->eh_ops.shutdown(ud); | |
1555 | + | |
1556 | + ud->event &= ~USBIP_EH_SHUTDOWN; | |
1557 | + | |
1558 | + break; | |
1559 | + } | |
1560 | + | |
1561 | + /* Stop the error handler. */ | |
1562 | + if (ud->event & USBIP_EH_BYE) | |
1563 | + return -1; | |
1564 | + | |
1565 | + /* Reset the device. */ | |
1566 | + if (ud->event & USBIP_EH_RESET) { | |
1567 | + ud->eh_ops.reset(ud); | |
1568 | + | |
1569 | + ud->event &= ~USBIP_EH_RESET; | |
1570 | + | |
1571 | + break; | |
1572 | + } | |
1573 | + | |
1574 | + /* Mark the device as unusable. */ | |
1575 | + if (ud->event & USBIP_EH_UNUSABLE) { | |
1576 | + ud->eh_ops.unusable(ud); | |
1577 | + | |
1578 | + ud->event &= ~USBIP_EH_UNUSABLE; | |
1579 | + | |
1580 | + break; | |
1581 | + } | |
1582 | + | |
1583 | + /* NOTREACHED */ | |
1584 | + printk(KERN_ERR "%s: unknown event\n", __func__); | |
1585 | + return -1; | |
1586 | + } | |
1587 | + | |
1588 | + return 0; | |
1589 | +} | |
1590 | + | |
1591 | +static void event_handler_loop(struct usbip_task *ut) | |
1592 | +{ | |
1593 | + struct usbip_device *ud = container_of(ut, struct usbip_device, eh); | |
1594 | + | |
1595 | + while (1) { | |
1596 | + if (signal_pending(current)) { | |
1597 | + dbg_eh("signal catched!\n"); | |
1598 | + break; | |
1599 | + } | |
1600 | + | |
1601 | + if (event_handler(ud) < 0) | |
1602 | + break; | |
1603 | + | |
1604 | + wait_event_interruptible(ud->eh_waitq, usbip_event_happend(ud)); | |
1605 | + dbg_eh("wakeup\n"); | |
1606 | + } | |
1607 | +} | |
1608 | + | |
1609 | +void usbip_start_eh(struct usbip_device *ud) | |
1610 | +{ | |
1611 | + struct usbip_task *eh = &ud->eh; | |
1612 | + | |
1613 | + init_waitqueue_head(&ud->eh_waitq); | |
1614 | + ud->event = 0; | |
1615 | + | |
1616 | + usbip_task_init(eh, "usbip_eh", event_handler_loop); | |
1617 | + | |
1618 | + kernel_thread(usbip_thread, (void *)eh, 0); | |
1619 | + | |
1620 | + wait_for_completion(&eh->thread_done); | |
1621 | +} | |
1622 | +EXPORT_SYMBOL_GPL(usbip_start_eh); | |
1623 | + | |
1624 | +void usbip_stop_eh(struct usbip_device *ud) | |
1625 | +{ | |
1626 | + struct usbip_task *eh = &ud->eh; | |
1627 | + | |
1628 | + wait_for_completion(&eh->thread_done); | |
1629 | + dbg_eh("usbip_eh has finished\n"); | |
1630 | +} | |
1631 | +EXPORT_SYMBOL_GPL(usbip_stop_eh); | |
1632 | + | |
1633 | +void usbip_event_add(struct usbip_device *ud, unsigned long event) | |
1634 | +{ | |
1635 | + spin_lock(&ud->lock); | |
1636 | + | |
1637 | + ud->event |= event; | |
1638 | + | |
1639 | + wake_up(&ud->eh_waitq); | |
1640 | + | |
1641 | + spin_unlock(&ud->lock); | |
1642 | +} | |
1643 | +EXPORT_SYMBOL_GPL(usbip_event_add); | |
1644 | + | |
1645 | +int usbip_event_happend(struct usbip_device *ud) | |
1646 | +{ | |
1647 | + int happend = 0; | |
1648 | + | |
1649 | + spin_lock(&ud->lock); | |
1650 | + | |
1651 | + if (ud->event != 0) | |
1652 | + happend = 1; | |
1653 | + | |
1654 | + spin_unlock(&ud->lock); | |
1655 | + | |
1656 | + return happend; | |
1657 | +} | |
1658 | +EXPORT_SYMBOL_GPL(usbip_event_happend); | |
1659 | -- | |
1660 | 1.6.0.2 | |
1661 |