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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / staging / usbip / usbip_common.c
blob22f93dd0ba034ac741dcba70642fbf5272957070
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/file.h>
22 #include <linux/tcp.h>
23 #include <linux/in.h>
24 #include "usbip_common.h"
25
26 /* version information */
27 #define DRIVER_VERSION "1.0"
28 #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
29 #define DRIVER_DESC "usbip common driver"
30
31 /*-------------------------------------------------------------------------*/
32 /* debug routines */
33
34 #ifdef CONFIG_USB_DEBUG
35 unsigned long usbip_debug_flag = 0xffffffff;
36 #else
37 unsigned long usbip_debug_flag;
38 #endif
39 EXPORT_SYMBOL_GPL(usbip_debug_flag);
40
41
42 /* FIXME */
43 struct device_attribute dev_attr_usbip_debug;
44 EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
45
46
47 static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
48 char *buf)
49 {
50 return sprintf(buf, "%lx\n", usbip_debug_flag);
51 }
52
53 static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
54 const char *buf, size_t count)
55 {
56 unsigned long flag;
57
58 sscanf(buf, "%lx", &flag);
59 usbip_debug_flag = flag;
60
61 return count;
62 }
63 DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
64
65 static void usbip_dump_buffer(char *buff, int bufflen)
66 {
67 int i;
68
69 if (bufflen > 128) {
70 for (i = 0; i < 128; i++) {
71 if (i%24 == 0)
72 printk(" ");
73 printk("%02x ", (unsigned char) buff[i]);
74 if (i%4 == 3)
75 printk("| ");
76 if (i%24 == 23)
77 printk("\n");
78 }
79 printk("... (%d byte)\n", bufflen);
80 return;
81 }
82
83 for (i = 0; i < bufflen; i++) {
84 if (i%24 == 0)
85 printk(" ");
86 printk("%02x ", (unsigned char) buff[i]);
87 if (i%4 == 3)
88 printk("| ");
89 if (i%24 == 23)
90 printk("\n");
91 }
92 printk("\n");
93
94 }
95
96 static void usbip_dump_pipe(unsigned int p)
97 {
98 unsigned char type = usb_pipetype(p);
99 unsigned char ep = usb_pipeendpoint(p);
100 unsigned char dev = usb_pipedevice(p);
101 unsigned char dir = usb_pipein(p);
102
103 printk("dev(%d) ", dev);
104 printk("ep(%d) ", ep);
105 printk("%s ", dir ? "IN" : "OUT");
106
107 switch (type) {
108 case PIPE_ISOCHRONOUS:
109 printk("%s ", "ISO");
110 break;
111 case PIPE_INTERRUPT:
112 printk("%s ", "INT");
113 break;
114 case PIPE_CONTROL:
115 printk("%s ", "CTL");
116 break;
117 case PIPE_BULK:
118 printk("%s ", "BLK");
119 break;
120 default:
121 printk("ERR");
122 }
123
124 printk("\n");
125
126 }
127
128 static void usbip_dump_usb_device(struct usb_device *udev)
129 {
130 struct device *dev = &udev->dev;
131 int i;
132
133 dev_dbg(dev, " devnum(%d) devpath(%s)",
134 udev->devnum, udev->devpath);
135
136 switch (udev->speed) {
137 case USB_SPEED_HIGH:
138 printk(" SPD_HIGH");
139 break;
140 case USB_SPEED_FULL:
141 printk(" SPD_FULL");
142 break;
143 case USB_SPEED_LOW:
144 printk(" SPD_LOW");
145 break;
146 case USB_SPEED_UNKNOWN:
147 printk(" SPD_UNKNOWN");
148 break;
149 default:
150 printk(" SPD_ERROR");
151 }
152
153 printk(" tt %p, ttport %d", udev->tt, udev->ttport);
154 printk("\n");
155
156 dev_dbg(dev, " ");
157 for (i = 0; i < 16; i++)
158 printk(" %2u", i);
159 printk("\n");
160
161 dev_dbg(dev, " toggle0(IN) :");
162 for (i = 0; i < 16; i++)
163 printk(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
164 printk("\n");
165
166 dev_dbg(dev, " toggle1(OUT):");
167 for (i = 0; i < 16; i++)
168 printk(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
169 printk("\n");
170
171
172 dev_dbg(dev, " epmaxp_in :");
173 for (i = 0; i < 16; i++) {
174 if (udev->ep_in[i])
175 printk(" %2u",
176 le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
177 }
178 printk("\n");
179
180 dev_dbg(dev, " epmaxp_out :");
181 for (i = 0; i < 16; i++) {
182 if (udev->ep_out[i])
183 printk(" %2u",
184 le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
185 }
186 printk("\n");
187
188 dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
189
190 dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
191 "rawdescriptors %p\n", &udev->descriptor, udev->config,
192 udev->actconfig, udev->rawdescriptors);
193
194 dev_dbg(dev, "have_langid %d, string_langid %d\n",
195 udev->have_langid, udev->string_langid);
196
197 dev_dbg(dev, "maxchild %d, children %p\n",
198 udev->maxchild, udev->children);
199 }
200
201 static void usbip_dump_request_type(__u8 rt)
202 {
203 switch (rt & USB_RECIP_MASK) {
204 case USB_RECIP_DEVICE:
205 printk("DEVICE");
206 break;
207 case USB_RECIP_INTERFACE:
208 printk("INTERF");
209 break;
210 case USB_RECIP_ENDPOINT:
211 printk("ENDPOI");
212 break;
213 case USB_RECIP_OTHER:
214 printk("OTHER ");
215 break;
216 default:
217 printk("------");
218 }
219 }
220
221 static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
222 {
223 if (!cmd) {
224 printk(" %s : null pointer\n", __func__);
225 return;
226 }
227
228 printk(" ");
229 printk("bRequestType(%02X) ", cmd->bRequestType);
230 printk("bRequest(%02X) " , cmd->bRequest);
231 printk("wValue(%04X) ", cmd->wValue);
232 printk("wIndex(%04X) ", cmd->wIndex);
233 printk("wLength(%04X) ", cmd->wLength);
234
235 printk("\n ");
236
237 if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
238 printk("STANDARD ");
239 switch (cmd->bRequest) {
240 case USB_REQ_GET_STATUS:
241 printk("GET_STATUS");
242 break;
243 case USB_REQ_CLEAR_FEATURE:
244 printk("CLEAR_FEAT");
245 break;
246 case USB_REQ_SET_FEATURE:
247 printk("SET_FEAT ");
248 break;
249 case USB_REQ_SET_ADDRESS:
250 printk("SET_ADDRRS");
251 break;
252 case USB_REQ_GET_DESCRIPTOR:
253 printk("GET_DESCRI");
254 break;
255 case USB_REQ_SET_DESCRIPTOR:
256 printk("SET_DESCRI");
257 break;
258 case USB_REQ_GET_CONFIGURATION:
259 printk("GET_CONFIG");
260 break;
261 case USB_REQ_SET_CONFIGURATION:
262 printk("SET_CONFIG");
263 break;
264 case USB_REQ_GET_INTERFACE:
265 printk("GET_INTERF");
266 break;
267 case USB_REQ_SET_INTERFACE:
268 printk("SET_INTERF");
269 break;
270 case USB_REQ_SYNCH_FRAME:
271 printk("SYNC_FRAME");
272 break;
273 default:
274 printk("REQ(%02X) ", cmd->bRequest);
275 }
276
277 printk(" ");
278 usbip_dump_request_type(cmd->bRequestType);
279
280 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
281 printk("CLASS ");
282
283 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
284 printk("VENDOR ");
285
286 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
287 printk("RESERVED");
288
289 printk("\n");
290 }
291
292 void usbip_dump_urb(struct urb *urb)
293 {
294 struct device *dev;
295
296 if (!urb) {
297 printk(KERN_DEBUG KBUILD_MODNAME
298 ":%s: urb: null pointer!!\n", __func__);
299 return;
300 }
301
302 if (!urb->dev) {
303 printk(KERN_DEBUG KBUILD_MODNAME
304 ":%s: urb->dev: null pointer!!\n", __func__);
305 return;
306 }
307 dev = &urb->dev->dev;
308
309 dev_dbg(dev, " urb :%p\n", urb);
310 dev_dbg(dev, " dev :%p\n", urb->dev);
311
312 usbip_dump_usb_device(urb->dev);
313
314 dev_dbg(dev, " pipe :%08x ", urb->pipe);
315
316 usbip_dump_pipe(urb->pipe);
317
318 dev_dbg(dev, " status :%d\n", urb->status);
319 dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
320 dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
321 dev_dbg(dev, " transfer_buffer_length:%d\n", urb->transfer_buffer_length);
322 dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
323 dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
324
325 if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
326 usbip_dump_usb_ctrlrequest(
327 (struct usb_ctrlrequest *)urb->setup_packet);
328
329 dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
330 dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
331 dev_dbg(dev, " interval :%d\n", urb->interval);
332 dev_dbg(dev, " error_count :%d\n", urb->error_count);
333 dev_dbg(dev, " context :%p\n", urb->context);
334 dev_dbg(dev, " complete :%p\n", urb->complete);
335 }
336 EXPORT_SYMBOL_GPL(usbip_dump_urb);
337
338 void usbip_dump_header(struct usbip_header *pdu)
339 {
340 udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
341 pdu->base.command,
342 pdu->base.seqnum,
343 pdu->base.devid,
344 pdu->base.direction,
345 pdu->base.ep);
346
347 switch (pdu->base.command) {
348 case USBIP_CMD_SUBMIT:
349 udbg("CMD_SUBMIT: x_flags %u x_len %u sf %u #p %u iv %u\n",
350 pdu->u.cmd_submit.transfer_flags,
351 pdu->u.cmd_submit.transfer_buffer_length,
352 pdu->u.cmd_submit.start_frame,
353 pdu->u.cmd_submit.number_of_packets,
354 pdu->u.cmd_submit.interval);
355 break;
356 case USBIP_CMD_UNLINK:
357 udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
358 break;
359 case USBIP_RET_SUBMIT:
360 udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
361 pdu->u.ret_submit.status,
362 pdu->u.ret_submit.actual_length,
363 pdu->u.ret_submit.start_frame,
364 pdu->u.ret_submit.error_count);
365 case USBIP_RET_UNLINK:
366 udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
367 break;
368 default:
369 /* NOT REACHED */
370 udbg("UNKNOWN\n");
371 }
372 }
373 EXPORT_SYMBOL_GPL(usbip_dump_header);
374
375
376 /*-------------------------------------------------------------------------*/
377 /* thread routines */
378
379 int usbip_thread(void *param)
380 {
381 struct usbip_task *ut = param;
382
383 if (!ut)
384 return -EINVAL;
385
386 lock_kernel();
387 daemonize(ut->name);
388 allow_signal(SIGKILL);
389 ut->thread = current;
390 unlock_kernel();
391
392 /* srv.rb must wait for rx_thread starting */
393 complete(&ut->thread_done);
394
395 /* start of while loop */
396 ut->loop_ops(ut);
397
398 /* end of loop */
399 ut->thread = NULL;
400
401 complete_and_exit(&ut->thread_done, 0);
402 }
403
404 void usbip_start_threads(struct usbip_device *ud)
405 {
406 /*
407 * threads are invoked per one device (per one connection).
408 */
409 int retval;
410
411 retval = kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
412 if (retval < 0) {
413 printk(KERN_ERR "Creating tcp_rx thread for ud %p failed.\n",
414 ud);
415 return;
416 }
417 retval = kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
418 if (retval < 0) {
419 printk(KERN_ERR "Creating tcp_tx thread for ud %p failed.\n",
420 ud);
421 return;
422 }
423
424 /* confirm threads are starting */
425 wait_for_completion(&ud->tcp_rx.thread_done);
426 wait_for_completion(&ud->tcp_tx.thread_done);
427 }
428 EXPORT_SYMBOL_GPL(usbip_start_threads);
429
430 void usbip_stop_threads(struct usbip_device *ud)
431 {
432 /* kill threads related to this sdev, if v.c. exists */
433 if (ud->tcp_rx.thread != NULL) {
434 send_sig(SIGKILL, ud->tcp_rx.thread, 1);
435 wait_for_completion(&ud->tcp_rx.thread_done);
436 udbg("rx_thread for ud %p has finished\n", ud);
437 }
438
439 if (ud->tcp_tx.thread != NULL) {
440 send_sig(SIGKILL, ud->tcp_tx.thread, 1);
441 wait_for_completion(&ud->tcp_tx.thread_done);
442 udbg("tx_thread for ud %p has finished\n", ud);
443 }
444 }
445 EXPORT_SYMBOL_GPL(usbip_stop_threads);
446
447 void usbip_task_init(struct usbip_task *ut, char *name,
448 void (*loop_ops)(struct usbip_task *))
449 {
450 ut->thread = NULL;
451 init_completion(&ut->thread_done);
452 ut->name = name;
453 ut->loop_ops = loop_ops;
454 }
455 EXPORT_SYMBOL_GPL(usbip_task_init);
456
457
458 /*-------------------------------------------------------------------------*/
459 /* socket routines */
460
461 /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
462 int usbip_xmit(int send, struct socket *sock, char *buf,
463 int size, int msg_flags)
464 {
465 int result;
466 struct msghdr msg;
467 struct kvec iov;
468 int total = 0;
469
470 /* for blocks of if (dbg_flag_xmit) */
471 char *bp = buf;
472 int osize = size;
473
474 dbg_xmit("enter\n");
475
476 if (!sock || !buf || !size) {
477 printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
478 __func__, sock, buf, size);
479 return -EINVAL;
480 }
481
482
483 if (dbg_flag_xmit) {
484 if (send) {
485 if (!in_interrupt())
486 printk(KERN_DEBUG "%-10s:", current->comm);
487 else
488 printk(KERN_DEBUG "interupt :");
489
490 printk("%s: sending... , sock %p, buf %p, "
491 "size %d, msg_flags %d\n", __func__,
492 sock, buf, size, msg_flags);
493 usbip_dump_buffer(buf, size);
494 }
495 }
496
497
498 do {
499 sock->sk->sk_allocation = GFP_NOIO;
500 iov.iov_base = buf;
501 iov.iov_len = size;
502 msg.msg_name = NULL;
503 msg.msg_namelen = 0;
504 msg.msg_control = NULL;
505 msg.msg_controllen = 0;
506 msg.msg_namelen = 0;
507 msg.msg_flags = msg_flags | MSG_NOSIGNAL;
508
509 if (send)
510 result = kernel_sendmsg(sock, &msg, &iov, 1, size);
511 else
512 result = kernel_recvmsg(sock, &msg, &iov, 1, size,
513 MSG_WAITALL);
514
515 if (result <= 0) {
516 udbg("usbip_xmit: %s sock %p buf %p size %u ret %d"
517 " total %d\n",
518 send ? "send" : "receive", sock, buf,
519 size, result, total);
520 goto err;
521 }
522
523 size -= result;
524 buf += result;
525 total += result;
526
527 } while (size > 0);
528
529
530 if (dbg_flag_xmit) {
531 if (!send) {
532 if (!in_interrupt())
533 printk(KERN_DEBUG "%-10s:", current->comm);
534 else
535 printk(KERN_DEBUG "interupt :");
536
537 printk("usbip_xmit: receiving....\n");
538 usbip_dump_buffer(bp, osize);
539 printk("usbip_xmit: received, osize %d ret %d size %d "
540 "total %d\n", osize, result, size,
541 total);
542 }
543
544 if (send)
545 printk("usbip_xmit: send, total %d\n", total);
546 }
547
548 return total;
549
550 err:
551 return result;
552 }
553 EXPORT_SYMBOL_GPL(usbip_xmit);
554
555
556 /* now a usrland utility should set options. */
557 #if 0
558 int setquickack(struct socket *socket)
559 {
560 mm_segment_t oldfs;
561 int val = 1;
562 int ret;
563
564 oldfs = get_fs();
565 set_fs(get_ds());
566 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK,
567 (char __user *) &val, sizeof(ret));
568 set_fs(oldfs);
569
570 return ret;
571 }
572
573 int setnodelay(struct socket *socket)
574 {
575 mm_segment_t oldfs;
576 int val = 1;
577 int ret;
578
579 oldfs = get_fs();
580 set_fs(get_ds());
581 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY,
582 (char __user *) &val, sizeof(ret));
583 set_fs(oldfs);
584
585 return ret;
586 }
587
588 int setkeepalive(struct socket *socket)
589 {
590 mm_segment_t oldfs;
591 int val = 1;
592 int ret;
593
594 oldfs = get_fs();
595 set_fs(get_ds());
596 ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE,
597 (char __user *) &val, sizeof(ret));
598 set_fs(oldfs);
599
600 return ret;
601 }
602
603 void setreuse(struct socket *socket)
604 {
605 socket->sk->sk_reuse = 1;
606 }
607 #endif
608
609 struct socket *sockfd_to_socket(unsigned int sockfd)
610 {
611 struct socket *socket;
612 struct file *file;
613 struct inode *inode;
614
615 file = fget(sockfd);
616 if (!file) {
617 printk(KERN_ERR "%s: invalid sockfd\n", __func__);
618 return NULL;
619 }
620
621 inode = file->f_dentry->d_inode;
622
623 if (!inode || !S_ISSOCK(inode->i_mode))
624 return NULL;
625
626 socket = SOCKET_I(inode);
627
628 return socket;
629 }
630 EXPORT_SYMBOL_GPL(sockfd_to_socket);
631
632
633
634 /*-------------------------------------------------------------------------*/
635 /* pdu routines */
636
637 /* there may be more cases to tweak the flags. */
638 static unsigned int tweak_transfer_flags(unsigned int flags)
639 {
640
641 if (flags & URB_NO_TRANSFER_DMA_MAP)
642 /*
643 * vhci_hcd does not provide DMA-mapped I/O. The upper
644 * driver does not need to set this flag. The remote
645 * usbip.ko does not still perform DMA-mapped I/O for
646 * DMA-caplable host controllers. So, clear this flag.
647 */
648 flags &= ~URB_NO_TRANSFER_DMA_MAP;
649
650 if (flags & URB_NO_SETUP_DMA_MAP)
651 flags &= ~URB_NO_SETUP_DMA_MAP;
652
653 return flags;
654 }
655
656 static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
657 int pack)
658 {
659 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
660
661 /*
662 * Some members are not still implemented in usbip. I hope this issue
663 * will be discussed when usbip is ported to other operating systems.
664 */
665 if (pack) {
666 /* vhci_tx.c */
667 spdu->transfer_flags =
668 tweak_transfer_flags(urb->transfer_flags);
669 spdu->transfer_buffer_length = urb->transfer_buffer_length;
670 spdu->start_frame = urb->start_frame;
671 spdu->number_of_packets = urb->number_of_packets;
672 spdu->interval = urb->interval;
673 } else {
674 /* stub_rx.c */
675 urb->transfer_flags = spdu->transfer_flags;
676
677 urb->transfer_buffer_length = spdu->transfer_buffer_length;
678 urb->start_frame = spdu->start_frame;
679 urb->number_of_packets = spdu->number_of_packets;
680 urb->interval = spdu->interval;
681 }
682 }
683
684 static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
685 int pack)
686 {
687 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
688
689 if (pack) {
690 /* stub_tx.c */
691
692 rpdu->status = urb->status;
693 rpdu->actual_length = urb->actual_length;
694 rpdu->start_frame = urb->start_frame;
695 rpdu->error_count = urb->error_count;
696 } else {
697 /* vhci_rx.c */
698
699 urb->status = rpdu->status;
700 urb->actual_length = rpdu->actual_length;
701 urb->start_frame = rpdu->start_frame;
702 urb->error_count = rpdu->error_count;
703 }
704 }
705
706
707 void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
708 int pack)
709 {
710 switch (cmd) {
711 case USBIP_CMD_SUBMIT:
712 usbip_pack_cmd_submit(pdu, urb, pack);
713 break;
714 case USBIP_RET_SUBMIT:
715 usbip_pack_ret_submit(pdu, urb, pack);
716 break;
717 default:
718 err("unknown command");
719 /* NOTREACHED */
720 /* BUG(); */
721 }
722 }
723 EXPORT_SYMBOL_GPL(usbip_pack_pdu);
724
725
726 static void correct_endian_basic(struct usbip_header_basic *base, int send)
727 {
728 if (send) {
729 base->command = cpu_to_be32(base->command);
730 base->seqnum = cpu_to_be32(base->seqnum);
731 base->devid = cpu_to_be32(base->devid);
732 base->direction = cpu_to_be32(base->direction);
733 base->ep = cpu_to_be32(base->ep);
734 } else {
735 base->command = be32_to_cpu(base->command);
736 base->seqnum = be32_to_cpu(base->seqnum);
737 base->devid = be32_to_cpu(base->devid);
738 base->direction = be32_to_cpu(base->direction);
739 base->ep = be32_to_cpu(base->ep);
740 }
741 }
742
743 static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
744 int send)
745 {
746 if (send) {
747 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
748
749 cpu_to_be32s(&pdu->transfer_buffer_length);
750 cpu_to_be32s(&pdu->start_frame);
751 cpu_to_be32s(&pdu->number_of_packets);
752 cpu_to_be32s(&pdu->interval);
753 } else {
754 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
755
756 be32_to_cpus(&pdu->transfer_buffer_length);
757 be32_to_cpus(&pdu->start_frame);
758 be32_to_cpus(&pdu->number_of_packets);
759 be32_to_cpus(&pdu->interval);
760 }
761 }
762
763 static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
764 int send)
765 {
766 if (send) {
767 cpu_to_be32s(&pdu->status);
768 cpu_to_be32s(&pdu->actual_length);
769 cpu_to_be32s(&pdu->start_frame);
770 cpu_to_be32s(&pdu->error_count);
771 } else {
772 be32_to_cpus(&pdu->status);
773 be32_to_cpus(&pdu->actual_length);
774 be32_to_cpus(&pdu->start_frame);
775 be32_to_cpus(&pdu->error_count);
776 }
777 }
778
779 static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
780 int send)
781 {
782 if (send)
783 pdu->seqnum = cpu_to_be32(pdu->seqnum);
784 else
785 pdu->seqnum = be32_to_cpu(pdu->seqnum);
786 }
787
788 static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
789 int send)
790 {
791 if (send)
792 cpu_to_be32s(&pdu->status);
793 else
794 be32_to_cpus(&pdu->status);
795 }
796
797 void usbip_header_correct_endian(struct usbip_header *pdu, int send)
798 {
799 __u32 cmd = 0;
800
801 if (send)
802 cmd = pdu->base.command;
803
804 correct_endian_basic(&pdu->base, send);
805
806 if (!send)
807 cmd = pdu->base.command;
808
809 switch (cmd) {
810 case USBIP_CMD_SUBMIT:
811 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
812 break;
813 case USBIP_RET_SUBMIT:
814 correct_endian_ret_submit(&pdu->u.ret_submit, send);
815 break;
816 case USBIP_CMD_UNLINK:
817 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
818 break;
819 case USBIP_RET_UNLINK:
820 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
821 break;
822 default:
823 /* NOTREACHED */
824 err("unknown command in pdu header: %d", cmd);
825 /* BUG(); */
826 }
827 }
828 EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
829
830 static void usbip_iso_pakcet_correct_endian(
831 struct usbip_iso_packet_descriptor *iso,
832 int send)
833 {
834 /* does not need all members. but copy all simply. */
835 if (send) {
836 iso->offset = cpu_to_be32(iso->offset);
837 iso->length = cpu_to_be32(iso->length);
838 iso->status = cpu_to_be32(iso->status);
839 iso->actual_length = cpu_to_be32(iso->actual_length);
840 } else {
841 iso->offset = be32_to_cpu(iso->offset);
842 iso->length = be32_to_cpu(iso->length);
843 iso->status = be32_to_cpu(iso->status);
844 iso->actual_length = be32_to_cpu(iso->actual_length);
845 }
846 }
847
848 static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
849 struct usb_iso_packet_descriptor *uiso, int pack)
850 {
851 if (pack) {
852 iso->offset = uiso->offset;
853 iso->length = uiso->length;
854 iso->status = uiso->status;
855 iso->actual_length = uiso->actual_length;
856 } else {
857 uiso->offset = iso->offset;
858 uiso->length = iso->length;
859 uiso->status = iso->status;
860 uiso->actual_length = iso->actual_length;
861 }
862 }
863
864
865 /* must free buffer */
866 void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
867 {
868 void *buff;
869 struct usbip_iso_packet_descriptor *iso;
870 int np = urb->number_of_packets;
871 ssize_t size = np * sizeof(*iso);
872 int i;
873
874 buff = kzalloc(size, GFP_KERNEL);
875 if (!buff)
876 return NULL;
877
878 for (i = 0; i < np; i++) {
879 iso = buff + (i * sizeof(*iso));
880
881 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
882 usbip_iso_pakcet_correct_endian(iso, 1);
883 }
884
885 *bufflen = size;
886
887 return buff;
888 }
889 EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
890
891 /* some members of urb must be substituted before. */
892 int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
893 {
894 void *buff;
895 struct usbip_iso_packet_descriptor *iso;
896 int np = urb->number_of_packets;
897 int size = np * sizeof(*iso);
898 int i;
899 int ret;
900
901 if (!usb_pipeisoc(urb->pipe))
902 return 0;
903
904 /* my Bluetooth dongle gets ISO URBs which are np = 0 */
905 if (np == 0) {
906 /* uinfo("iso np == 0\n"); */
907 /* usbip_dump_urb(urb); */
908 return 0;
909 }
910
911 buff = kzalloc(size, GFP_KERNEL);
912 if (!buff)
913 return -ENOMEM;
914
915 ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
916 if (ret != size) {
917 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
918 ret);
919 kfree(buff);
920
921 if (ud->side == USBIP_STUB)
922 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
923 else
924 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
925
926 return -EPIPE;
927 }
928
929 for (i = 0; i < np; i++) {
930 iso = buff + (i * sizeof(*iso));
931
932 usbip_iso_pakcet_correct_endian(iso, 0);
933 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
934 }
935
936
937 kfree(buff);
938
939 return ret;
940 }
941 EXPORT_SYMBOL_GPL(usbip_recv_iso);
942
943
944 /* some members of urb must be substituted before. */
945 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
946 {
947 int ret;
948 int size;
949
950 if (ud->side == USBIP_STUB) {
951 /* stub_rx.c */
952 /* the direction of urb must be OUT. */
953 if (usb_pipein(urb->pipe))
954 return 0;
955
956 size = urb->transfer_buffer_length;
957 } else {
958 /* vhci_rx.c */
959 /* the direction of urb must be IN. */
960 if (usb_pipeout(urb->pipe))
961 return 0;
962
963 size = urb->actual_length;
964 }
965
966 /* no need to recv xbuff */
967 if (!(size > 0))
968 return 0;
969
970 ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
971 size, 0);
972 if (ret != size) {
973 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
974 if (ud->side == USBIP_STUB) {
975 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
976 } else {
977 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
978 return -EPIPE;
979 }
980 }
981
982 return ret;
983 }
984 EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
985
986
987 /*-------------------------------------------------------------------------*/
988
989 static int __init usbip_common_init(void)
990 {
991 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
992
993 return 0;
994 }
995
996 static void __exit usbip_common_exit(void)
997 {
998 return;
999 }
1000
1001
1002
1003
1004 module_init(usbip_common_init);
1005 module_exit(usbip_common_exit);
1006
1007 MODULE_AUTHOR(DRIVER_AUTHOR);
1008 MODULE_DESCRIPTION(DRIVER_DESC);
1009 MODULE_LICENSE("GPL");
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK