?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / staging / usbip / usbip_common.c
blob7c3c996aca5e239d9dd119822c0c0fd99717cd75
1 /*
2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
3 *
4 * This is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17 * USA.
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/smp_lock.h>
22 #include <linux/file.h>
23 #include <linux/tcp.h>
24 #include <linux/in.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include "usbip_common.h"
28
29 /* version information */
30 #define DRIVER_VERSION "1.0"
31 #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
32 #define DRIVER_DESC "usbip common driver"
33
34 /*-------------------------------------------------------------------------*/
35 /* debug routines */
36
37 #ifdef CONFIG_USB_IP_DEBUG_ENABLE
38 unsigned long usbip_debug_flag = 0xffffffff;
39 #else
40 unsigned long usbip_debug_flag;
41 #endif
42 EXPORT_SYMBOL_GPL(usbip_debug_flag);
43
44
45 struct device_attribute dev_attr_usbip_debug;
46 EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
47
48
49 static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
50 char *buf)
51 {
52 return sprintf(buf, "%lx\n", usbip_debug_flag);
53 }
54
55 static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
56 const char *buf, size_t count)
57 {
58 sscanf(buf, "%lx", &usbip_debug_flag);
59
60 return count;
61 }
62 DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
63
64 static void usbip_dump_buffer(char *buff, int bufflen)
65 {
66 print_hex_dump(KERN_DEBUG, "usb-ip", DUMP_PREFIX_OFFSET, 16, 4,
67 buff, bufflen, false);
68 }
69
70 static void usbip_dump_pipe(unsigned int p)
71 {
72 unsigned char type = usb_pipetype(p);
73 unsigned char ep = usb_pipeendpoint(p);
74 unsigned char dev = usb_pipedevice(p);
75 unsigned char dir = usb_pipein(p);
76
77 printk(KERN_DEBUG "dev(%d) ", dev);
78 printk(KERN_DEBUG "ep(%d) ", ep);
79 printk(KERN_DEBUG "%s ", dir ? "IN" : "OUT");
80
81 switch (type) {
82 case PIPE_ISOCHRONOUS:
83 printk(KERN_DEBUG "%s ", "ISO");
84 break;
85 case PIPE_INTERRUPT:
86 printk(KERN_DEBUG "%s ", "INT");
87 break;
88 case PIPE_CONTROL:
89 printk(KERN_DEBUG "%s ", "CTL");
90 break;
91 case PIPE_BULK:
92 printk(KERN_DEBUG "%s ", "BLK");
93 break;
94 default:
95 printk(KERN_DEBUG "ERR");
96 }
97
98 printk(KERN_DEBUG "\n");
99
100 }
101
102 static void usbip_dump_usb_device(struct usb_device *udev)
103 {
104 struct device *dev = &udev->dev;
105 int i;
106
107 dev_dbg(dev, " devnum(%d) devpath(%s)",
108 udev->devnum, udev->devpath);
109
110 switch (udev->speed) {
111 case USB_SPEED_HIGH:
112 printk(KERN_DEBUG " SPD_HIGH");
113 break;
114 case USB_SPEED_FULL:
115 printk(KERN_DEBUG " SPD_FULL");
116 break;
117 case USB_SPEED_LOW:
118 printk(KERN_DEBUG " SPD_LOW");
119 break;
120 case USB_SPEED_UNKNOWN:
121 printk(KERN_DEBUG " SPD_UNKNOWN");
122 break;
123 default:
124 printk(KERN_DEBUG " SPD_ERROR");
125 }
126
127 printk(KERN_DEBUG " tt %p, ttport %d", udev->tt, udev->ttport);
128 printk(KERN_DEBUG "\n");
129
130 dev_dbg(dev, " ");
131 for (i = 0; i < 16; i++)
132 printk(KERN_DEBUG " %2u", i);
133 printk(KERN_DEBUG "\n");
134
135 dev_dbg(dev, " toggle0(IN) :");
136 for (i = 0; i < 16; i++)
137 printk(KERN_DEBUG " %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
138 printk(KERN_DEBUG "\n");
139
140 dev_dbg(dev, " toggle1(OUT):");
141 for (i = 0; i < 16; i++)
142 printk(KERN_DEBUG " %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
143 printk(KERN_DEBUG "\n");
144
145
146 dev_dbg(dev, " epmaxp_in :");
147 for (i = 0; i < 16; i++) {
148 if (udev->ep_in[i])
149 printk(KERN_DEBUG " %2u",
150 le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
151 }
152 printk(KERN_DEBUG "\n");
153
154 dev_dbg(dev, " epmaxp_out :");
155 for (i = 0; i < 16; i++) {
156 if (udev->ep_out[i])
157 printk(KERN_DEBUG " %2u",
158 le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
159 }
160 printk(KERN_DEBUG "\n");
161
162 dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
163
164 dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
165 "rawdescriptors %p\n", &udev->descriptor, udev->config,
166 udev->actconfig, udev->rawdescriptors);
167
168 dev_dbg(dev, "have_langid %d, string_langid %d\n",
169 udev->have_langid, udev->string_langid);
170
171 dev_dbg(dev, "maxchild %d, children %p\n",
172 udev->maxchild, udev->children);
173 }
174
175 static void usbip_dump_request_type(__u8 rt)
176 {
177 switch (rt & USB_RECIP_MASK) {
178 case USB_RECIP_DEVICE:
179 printk(KERN_DEBUG "DEVICE");
180 break;
181 case USB_RECIP_INTERFACE:
182 printk(KERN_DEBUG "INTERF");
183 break;
184 case USB_RECIP_ENDPOINT:
185 printk(KERN_DEBUG "ENDPOI");
186 break;
187 case USB_RECIP_OTHER:
188 printk(KERN_DEBUG "OTHER ");
189 break;
190 default:
191 printk(KERN_DEBUG "------");
192 }
193 }
194
195 static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
196 {
197 if (!cmd) {
198 printk(KERN_DEBUG " %s : null pointer\n", __func__);
199 return;
200 }
201
202 printk(KERN_DEBUG " ");
203 printk(KERN_DEBUG "bRequestType(%02X) ", cmd->bRequestType);
204 printk(KERN_DEBUG "bRequest(%02X) " , cmd->bRequest);
205 printk(KERN_DEBUG "wValue(%04X) ", cmd->wValue);
206 printk(KERN_DEBUG "wIndex(%04X) ", cmd->wIndex);
207 printk(KERN_DEBUG "wLength(%04X) ", cmd->wLength);
208
209 printk(KERN_DEBUG "\n ");
210
211 if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
212 printk(KERN_DEBUG "STANDARD ");
213 switch (cmd->bRequest) {
214 case USB_REQ_GET_STATUS:
215 printk(KERN_DEBUG "GET_STATUS");
216 break;
217 case USB_REQ_CLEAR_FEATURE:
218 printk(KERN_DEBUG "CLEAR_FEAT");
219 break;
220 case USB_REQ_SET_FEATURE:
221 printk(KERN_DEBUG "SET_FEAT ");
222 break;
223 case USB_REQ_SET_ADDRESS:
224 printk(KERN_DEBUG "SET_ADDRRS");
225 break;
226 case USB_REQ_GET_DESCRIPTOR:
227 printk(KERN_DEBUG "GET_DESCRI");
228 break;
229 case USB_REQ_SET_DESCRIPTOR:
230 printk(KERN_DEBUG "SET_DESCRI");
231 break;
232 case USB_REQ_GET_CONFIGURATION:
233 printk(KERN_DEBUG "GET_CONFIG");
234 break;
235 case USB_REQ_SET_CONFIGURATION:
236 printk(KERN_DEBUG "SET_CONFIG");
237 break;
238 case USB_REQ_GET_INTERFACE:
239 printk(KERN_DEBUG "GET_INTERF");
240 break;
241 case USB_REQ_SET_INTERFACE:
242 printk(KERN_DEBUG "SET_INTERF");
243 break;
244 case USB_REQ_SYNCH_FRAME:
245 printk(KERN_DEBUG "SYNC_FRAME");
246 break;
247 default:
248 printk(KERN_DEBUG "REQ(%02X) ", cmd->bRequest);
249 }
250
251 printk(KERN_DEBUG " ");
252 usbip_dump_request_type(cmd->bRequestType);
253
254 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
255 printk(KERN_DEBUG "CLASS ");
256
257 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
258 printk(KERN_DEBUG "VENDOR ");
259
260 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
261 printk(KERN_DEBUG "RESERVED");
262
263 printk(KERN_DEBUG "\n");
264 }
265
266 void usbip_dump_urb(struct urb *urb)
267 {
268 struct device *dev;
269
270 if (!urb) {
271 printk(KERN_DEBUG KBUILD_MODNAME
272 ":%s: urb: null pointer!!\n", __func__);
273 return;
274 }
275
276 if (!urb->dev) {
277 printk(KERN_DEBUG KBUILD_MODNAME
278 ":%s: urb->dev: null pointer!!\n", __func__);
279 return;
280 }
281 dev = &urb->dev->dev;
282
283 dev_dbg(dev, " urb :%p\n", urb);
284 dev_dbg(dev, " dev :%p\n", urb->dev);
285
286 usbip_dump_usb_device(urb->dev);
287
288 dev_dbg(dev, " pipe :%08x ", urb->pipe);
289
290 usbip_dump_pipe(urb->pipe);
291
292 dev_dbg(dev, " status :%d\n", urb->status);
293 dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
294 dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
295 dev_dbg(dev, " transfer_buffer_length:%d\n",
296 urb->transfer_buffer_length);
297 dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
298 dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
299
300 if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
301 usbip_dump_usb_ctrlrequest(
302 (struct usb_ctrlrequest *)urb->setup_packet);
303
304 dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
305 dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
306 dev_dbg(dev, " interval :%d\n", urb->interval);
307 dev_dbg(dev, " error_count :%d\n", urb->error_count);
308 dev_dbg(dev, " context :%p\n", urb->context);
309 dev_dbg(dev, " complete :%p\n", urb->complete);
310 }
311 EXPORT_SYMBOL_GPL(usbip_dump_urb);
312
313 void usbip_dump_header(struct usbip_header *pdu)
314 {
315 usbip_udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
316 pdu->base.command,
317 pdu->base.seqnum,
318 pdu->base.devid,
319 pdu->base.direction,
320 pdu->base.ep);
321
322 switch (pdu->base.command) {
323 case USBIP_CMD_SUBMIT:
324 usbip_udbg("CMD_SUBMIT: "
325 "x_flags %u x_len %u sf %u #p %u iv %u\n",
326 pdu->u.cmd_submit.transfer_flags,
327 pdu->u.cmd_submit.transfer_buffer_length,
328 pdu->u.cmd_submit.start_frame,
329 pdu->u.cmd_submit.number_of_packets,
330 pdu->u.cmd_submit.interval);
331 break;
332 case USBIP_CMD_UNLINK:
333 usbip_udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
334 break;
335 case USBIP_RET_SUBMIT:
336 usbip_udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
337 pdu->u.ret_submit.status,
338 pdu->u.ret_submit.actual_length,
339 pdu->u.ret_submit.start_frame,
340 pdu->u.ret_submit.error_count);
341 case USBIP_RET_UNLINK:
342 usbip_udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
343 break;
344 default:
345 /* NOT REACHED */
346 usbip_udbg("UNKNOWN\n");
347 }
348 }
349 EXPORT_SYMBOL_GPL(usbip_dump_header);
350
351
352 /*-------------------------------------------------------------------------*/
353 /* thread routines */
354
355 int usbip_thread(void *param)
356 {
357 struct usbip_task *ut = param;
358
359 if (!ut)
360 return -EINVAL;
361
362 lock_kernel();
363 daemonize(ut->name);
364 allow_signal(SIGKILL);
365 ut->thread = current;
366 unlock_kernel();
367
368 /* srv.rb must wait for rx_thread starting */
369 complete(&ut->thread_done);
370
371 /* start of while loop */
372 ut->loop_ops(ut);
373
374 /* end of loop */
375 ut->thread = NULL;
376
377 complete_and_exit(&ut->thread_done, 0);
378 }
379
380 static void stop_rx_thread(struct usbip_device *ud)
381 {
382 if (ud->tcp_rx.thread != NULL) {
383 send_sig(SIGKILL, ud->tcp_rx.thread, 1);
384 wait_for_completion(&ud->tcp_rx.thread_done);
385 usbip_udbg("rx_thread for ud %p has finished\n", ud);
386 }
387 }
388
389 static void stop_tx_thread(struct usbip_device *ud)
390 {
391 if (ud->tcp_tx.thread != NULL) {
392 send_sig(SIGKILL, ud->tcp_tx.thread, 1);
393 wait_for_completion(&ud->tcp_tx.thread_done);
394 usbip_udbg("tx_thread for ud %p has finished\n", ud);
395 }
396 }
397
398 int usbip_start_threads(struct usbip_device *ud)
399 {
400 /*
401 * threads are invoked per one device (per one connection).
402 */
403 struct task_struct *th;
404 int err = 0;
405
406 th = kthread_run(usbip_thread, (void *)&ud->tcp_rx, "usbip");
407 if (IS_ERR(th)) {
408 printk(KERN_WARNING
409 "Unable to start control thread\n");
410 err = PTR_ERR(th);
411 goto ust_exit;
412 }
413
414 th = kthread_run(usbip_thread, (void *)&ud->tcp_tx, "usbip");
415 if (IS_ERR(th)) {
416 printk(KERN_WARNING
417 "Unable to start control thread\n");
418 err = PTR_ERR(th);
419 goto tx_thread_err;
420 }
421
422 /* confirm threads are starting */
423 wait_for_completion(&ud->tcp_rx.thread_done);
424 wait_for_completion(&ud->tcp_tx.thread_done);
425
426 return 0;
427
428 tx_thread_err:
429 stop_rx_thread(ud);
430
431 ust_exit:
432 return err;
433 }
434 EXPORT_SYMBOL_GPL(usbip_start_threads);
435
436 void usbip_stop_threads(struct usbip_device *ud)
437 {
438 /* kill threads related to this sdev, if v.c. exists */
439 stop_rx_thread(ud);
440 stop_tx_thread(ud);
441 }
442 EXPORT_SYMBOL_GPL(usbip_stop_threads);
443
444 void usbip_task_init(struct usbip_task *ut, char *name,
445 void (*loop_ops)(struct usbip_task *))
446 {
447 ut->thread = NULL;
448 init_completion(&ut->thread_done);
449 ut->name = name;
450 ut->loop_ops = loop_ops;
451 }
452 EXPORT_SYMBOL_GPL(usbip_task_init);
453
454
455 /*-------------------------------------------------------------------------*/
456 /* socket routines */
457
458 /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
459 int usbip_xmit(int send, struct socket *sock, char *buf,
460 int size, int msg_flags)
461 {
462 int result;
463 struct msghdr msg;
464 struct kvec iov;
465 int total = 0;
466
467 /* for blocks of if (usbip_dbg_flag_xmit) */
468 char *bp = buf;
469 int osize = size;
470
471 usbip_dbg_xmit("enter\n");
472
473 if (!sock || !buf || !size) {
474 printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
475 __func__, sock, buf, size);
476 return -EINVAL;
477 }
478
479
480 if (usbip_dbg_flag_xmit) {
481 if (send) {
482 if (!in_interrupt())
483 printk(KERN_DEBUG "%-10s:", current->comm);
484 else
485 printk(KERN_DEBUG "interrupt :");
486
487 printk(KERN_DEBUG "%s: sending... , sock %p, buf %p, "
488 "size %d, msg_flags %d\n", __func__,
489 sock, buf, size, msg_flags);
490 usbip_dump_buffer(buf, size);
491 }
492 }
493
494
495 do {
496 sock->sk->sk_allocation = GFP_NOIO;
497 iov.iov_base = buf;
498 iov.iov_len = size;
499 msg.msg_name = NULL;
500 msg.msg_namelen = 0;
501 msg.msg_control = NULL;
502 msg.msg_controllen = 0;
503 msg.msg_namelen = 0;
504 msg.msg_flags = msg_flags | MSG_NOSIGNAL;
505
506 if (send)
507 result = kernel_sendmsg(sock, &msg, &iov, 1, size);
508 else
509 result = kernel_recvmsg(sock, &msg, &iov, 1, size,
510 MSG_WAITALL);
511
512 if (result <= 0) {
513 usbip_udbg("usbip_xmit: %s sock %p buf %p size %u ret "
514 "%d total %d\n",
515 send ? "send" : "receive", sock, buf,
516 size, result, total);
517 goto err;
518 }
519
520 size -= result;
521 buf += result;
522 total += result;
523
524 } while (size > 0);
525
526
527 if (usbip_dbg_flag_xmit) {
528 if (!send) {
529 if (!in_interrupt())
530 printk(KERN_DEBUG "%-10s:", current->comm);
531 else
532 printk(KERN_DEBUG "interrupt :");
533
534 printk(KERN_DEBUG "usbip_xmit: receiving....\n");
535 usbip_dump_buffer(bp, osize);
536 printk(KERN_DEBUG "usbip_xmit: received, osize %d ret "
537 "%d size %d total %d\n", osize, result,
538 size, total);
539 }
540
541 if (send)
542 printk(KERN_DEBUG "usbip_xmit: send, total %d\n",
543 total);
544 }
545
546 return total;
547
548 err:
549 return result;
550 }
551 EXPORT_SYMBOL_GPL(usbip_xmit);
552
553 struct socket *sockfd_to_socket(unsigned int sockfd)
554 {
555 struct socket *socket;
556 struct file *file;
557 struct inode *inode;
558
559 file = fget(sockfd);
560 if (!file) {
561 printk(KERN_ERR "%s: invalid sockfd\n", __func__);
562 return NULL;
563 }
564
565 inode = file->f_dentry->d_inode;
566
567 if (!inode || !S_ISSOCK(inode->i_mode))
568 return NULL;
569
570 socket = SOCKET_I(inode);
571
572 return socket;
573 }
574 EXPORT_SYMBOL_GPL(sockfd_to_socket);
575
576
577
578 /*-------------------------------------------------------------------------*/
579 /* pdu routines */
580
581 /* there may be more cases to tweak the flags. */
582 static unsigned int tweak_transfer_flags(unsigned int flags)
583 {
584 flags &= ~URB_NO_TRANSFER_DMA_MAP;
585 return flags;
586 }
587
588 static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
589 int pack)
590 {
591 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
592
593 /*
594 * Some members are not still implemented in usbip. I hope this issue
595 * will be discussed when usbip is ported to other operating systems.
596 */
597 if (pack) {
598 /* vhci_tx.c */
599 spdu->transfer_flags =
600 tweak_transfer_flags(urb->transfer_flags);
601 spdu->transfer_buffer_length = urb->transfer_buffer_length;
602 spdu->start_frame = urb->start_frame;
603 spdu->number_of_packets = urb->number_of_packets;
604 spdu->interval = urb->interval;
605 } else {
606 /* stub_rx.c */
607 urb->transfer_flags = spdu->transfer_flags;
608
609 urb->transfer_buffer_length = spdu->transfer_buffer_length;
610 urb->start_frame = spdu->start_frame;
611 urb->number_of_packets = spdu->number_of_packets;
612 urb->interval = spdu->interval;
613 }
614 }
615
616 static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
617 int pack)
618 {
619 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
620
621 if (pack) {
622 /* stub_tx.c */
623
624 rpdu->status = urb->status;
625 rpdu->actual_length = urb->actual_length;
626 rpdu->start_frame = urb->start_frame;
627 rpdu->error_count = urb->error_count;
628 } else {
629 /* vhci_rx.c */
630
631 urb->status = rpdu->status;
632 urb->actual_length = rpdu->actual_length;
633 urb->start_frame = rpdu->start_frame;
634 urb->error_count = rpdu->error_count;
635 }
636 }
637
638
639 void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
640 int pack)
641 {
642 switch (cmd) {
643 case USBIP_CMD_SUBMIT:
644 usbip_pack_cmd_submit(pdu, urb, pack);
645 break;
646 case USBIP_RET_SUBMIT:
647 usbip_pack_ret_submit(pdu, urb, pack);
648 break;
649 default:
650 err("unknown command");
651 /* NOTREACHED */
652 /* BUG(); */
653 }
654 }
655 EXPORT_SYMBOL_GPL(usbip_pack_pdu);
656
657
658 static void correct_endian_basic(struct usbip_header_basic *base, int send)
659 {
660 if (send) {
661 base->command = cpu_to_be32(base->command);
662 base->seqnum = cpu_to_be32(base->seqnum);
663 base->devid = cpu_to_be32(base->devid);
664 base->direction = cpu_to_be32(base->direction);
665 base->ep = cpu_to_be32(base->ep);
666 } else {
667 base->command = be32_to_cpu(base->command);
668 base->seqnum = be32_to_cpu(base->seqnum);
669 base->devid = be32_to_cpu(base->devid);
670 base->direction = be32_to_cpu(base->direction);
671 base->ep = be32_to_cpu(base->ep);
672 }
673 }
674
675 static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
676 int send)
677 {
678 if (send) {
679 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
680
681 cpu_to_be32s(&pdu->transfer_buffer_length);
682 cpu_to_be32s(&pdu->start_frame);
683 cpu_to_be32s(&pdu->number_of_packets);
684 cpu_to_be32s(&pdu->interval);
685 } else {
686 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
687
688 be32_to_cpus(&pdu->transfer_buffer_length);
689 be32_to_cpus(&pdu->start_frame);
690 be32_to_cpus(&pdu->number_of_packets);
691 be32_to_cpus(&pdu->interval);
692 }
693 }
694
695 static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
696 int send)
697 {
698 if (send) {
699 cpu_to_be32s(&pdu->status);
700 cpu_to_be32s(&pdu->actual_length);
701 cpu_to_be32s(&pdu->start_frame);
702 cpu_to_be32s(&pdu->error_count);
703 } else {
704 be32_to_cpus(&pdu->status);
705 be32_to_cpus(&pdu->actual_length);
706 be32_to_cpus(&pdu->start_frame);
707 be32_to_cpus(&pdu->error_count);
708 }
709 }
710
711 static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
712 int send)
713 {
714 if (send)
715 pdu->seqnum = cpu_to_be32(pdu->seqnum);
716 else
717 pdu->seqnum = be32_to_cpu(pdu->seqnum);
718 }
719
720 static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
721 int send)
722 {
723 if (send)
724 cpu_to_be32s(&pdu->status);
725 else
726 be32_to_cpus(&pdu->status);
727 }
728
729 void usbip_header_correct_endian(struct usbip_header *pdu, int send)
730 {
731 __u32 cmd = 0;
732
733 if (send)
734 cmd = pdu->base.command;
735
736 correct_endian_basic(&pdu->base, send);
737
738 if (!send)
739 cmd = pdu->base.command;
740
741 switch (cmd) {
742 case USBIP_CMD_SUBMIT:
743 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
744 break;
745 case USBIP_RET_SUBMIT:
746 correct_endian_ret_submit(&pdu->u.ret_submit, send);
747 break;
748 case USBIP_CMD_UNLINK:
749 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
750 break;
751 case USBIP_RET_UNLINK:
752 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
753 break;
754 default:
755 /* NOTREACHED */
756 err("unknown command in pdu header: %d", cmd);
757 /* BUG(); */
758 }
759 }
760 EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
761
762 static void usbip_iso_pakcet_correct_endian(
763 struct usbip_iso_packet_descriptor *iso,
764 int send)
765 {
766 /* does not need all members. but copy all simply. */
767 if (send) {
768 iso->offset = cpu_to_be32(iso->offset);
769 iso->length = cpu_to_be32(iso->length);
770 iso->status = cpu_to_be32(iso->status);
771 iso->actual_length = cpu_to_be32(iso->actual_length);
772 } else {
773 iso->offset = be32_to_cpu(iso->offset);
774 iso->length = be32_to_cpu(iso->length);
775 iso->status = be32_to_cpu(iso->status);
776 iso->actual_length = be32_to_cpu(iso->actual_length);
777 }
778 }
779
780 static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
781 struct usb_iso_packet_descriptor *uiso, int pack)
782 {
783 if (pack) {
784 iso->offset = uiso->offset;
785 iso->length = uiso->length;
786 iso->status = uiso->status;
787 iso->actual_length = uiso->actual_length;
788 } else {
789 uiso->offset = iso->offset;
790 uiso->length = iso->length;
791 uiso->status = iso->status;
792 uiso->actual_length = iso->actual_length;
793 }
794 }
795
796
797 /* must free buffer */
798 void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
799 {
800 void *buff;
801 struct usbip_iso_packet_descriptor *iso;
802 int np = urb->number_of_packets;
803 ssize_t size = np * sizeof(*iso);
804 int i;
805
806 buff = kzalloc(size, GFP_KERNEL);
807 if (!buff)
808 return NULL;
809
810 for (i = 0; i < np; i++) {
811 iso = buff + (i * sizeof(*iso));
812
813 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
814 usbip_iso_pakcet_correct_endian(iso, 1);
815 }
816
817 *bufflen = size;
818
819 return buff;
820 }
821 EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
822
823 /* some members of urb must be substituted before. */
824 int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
825 {
826 void *buff;
827 struct usbip_iso_packet_descriptor *iso;
828 int np = urb->number_of_packets;
829 int size = np * sizeof(*iso);
830 int i;
831 int ret;
832
833 if (!usb_pipeisoc(urb->pipe))
834 return 0;
835
836 /* my Bluetooth dongle gets ISO URBs which are np = 0 */
837 if (np == 0) {
838 /* usbip_uinfo("iso np == 0\n"); */
839 /* usbip_dump_urb(urb); */
840 return 0;
841 }
842
843 buff = kzalloc(size, GFP_KERNEL);
844 if (!buff)
845 return -ENOMEM;
846
847 ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
848 if (ret != size) {
849 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
850 ret);
851 kfree(buff);
852
853 if (ud->side == USBIP_STUB)
854 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
855 else
856 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
857
858 return -EPIPE;
859 }
860
861 for (i = 0; i < np; i++) {
862 iso = buff + (i * sizeof(*iso));
863
864 usbip_iso_pakcet_correct_endian(iso, 0);
865 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
866 }
867
868 kfree(buff);
869
870 return ret;
871 }
872 EXPORT_SYMBOL_GPL(usbip_recv_iso);
873
874
875 /* some members of urb must be substituted before. */
876 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
877 {
878 int ret;
879 int size;
880
881 if (ud->side == USBIP_STUB) {
882 /* stub_rx.c */
883 /* the direction of urb must be OUT. */
884 if (usb_pipein(urb->pipe))
885 return 0;
886
887 size = urb->transfer_buffer_length;
888 } else {
889 /* vhci_rx.c */
890 /* the direction of urb must be IN. */
891 if (usb_pipeout(urb->pipe))
892 return 0;
893
894 size = urb->actual_length;
895 }
896
897 /* no need to recv xbuff */
898 if (!(size > 0))
899 return 0;
900
901 ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
902 size, 0);
903 if (ret != size) {
904 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
905 if (ud->side == USBIP_STUB) {
906 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
907 } else {
908 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
909 return -EPIPE;
910 }
911 }
912
913 return ret;
914 }
915 EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
916
917
918 /*-------------------------------------------------------------------------*/
919
920 static int __init usbip_common_init(void)
921 {
922 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
923
924 return 0;
925 }
926
927 static void __exit usbip_common_exit(void)
928 {
929 return;
930 }
931
932
933
934
935 module_init(usbip_common_init);
936 module_exit(usbip_common_exit);
937
938 MODULE_AUTHOR(DRIVER_AUTHOR);
939 MODULE_DESCRIPTION(DRIVER_DESC);
940 MODULE_LICENSE("GPL");
Tomato firmware and modifications.