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staging: usbip: bugfix add number of packets for isochronous frames
[wandboard.git] / drivers / staging / usbip / usbip_common.c
blob74fec410aeb56fc032f7135a15895a6e4b08a350
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 "usbip_common.h"
27
28 /* version information */
29 #define DRIVER_VERSION "1.0"
30 #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
31 #define DRIVER_DESC "usbip common driver"
32
33 /*-------------------------------------------------------------------------*/
34 /* debug routines */
35
36 #ifdef CONFIG_USB_DEBUG
37 unsigned long usbip_debug_flag = 0xffffffff;
38 #else
39 unsigned long usbip_debug_flag;
40 #endif
41 EXPORT_SYMBOL_GPL(usbip_debug_flag);
42
43
44 /* FIXME */
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 unsigned long flag;
59
60 sscanf(buf, "%lx", &flag);
61 usbip_debug_flag = flag;
62
63 return count;
64 }
65 DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
66
67 static void usbip_dump_buffer(char *buff, int bufflen)
68 {
69 int i;
70
71 if (bufflen > 128) {
72 for (i = 0; i < 128; i++) {
73 if (i%24 == 0)
74 printk(KERN_DEBUG " ");
75 printk(KERN_DEBUG "%02x ", (unsigned char) buff[i]);
76 if (i%4 == 3)
77 printk(KERN_DEBUG "| ");
78 if (i%24 == 23)
79 printk(KERN_DEBUG "\n");
80 }
81 printk(KERN_DEBUG "... (%d byte)\n", bufflen);
82 return;
83 }
84
85 for (i = 0; i < bufflen; i++) {
86 if (i%24 == 0)
87 printk(KERN_DEBUG " ");
88 printk(KERN_DEBUG "%02x ", (unsigned char) buff[i]);
89 if (i%4 == 3)
90 printk(KERN_DEBUG "| ");
91 if (i%24 == 23)
92 printk(KERN_DEBUG "\n");
93 }
94 printk(KERN_DEBUG "\n");
95
96 }
97
98 static void usbip_dump_pipe(unsigned int p)
99 {
100 unsigned char type = usb_pipetype(p);
101 unsigned char ep = usb_pipeendpoint(p);
102 unsigned char dev = usb_pipedevice(p);
103 unsigned char dir = usb_pipein(p);
104
105 printk(KERN_DEBUG "dev(%d) ", dev);
106 printk(KERN_DEBUG "ep(%d) ", ep);
107 printk(KERN_DEBUG "%s ", dir ? "IN" : "OUT");
108
109 switch (type) {
110 case PIPE_ISOCHRONOUS:
111 printk(KERN_DEBUG "%s ", "ISO");
112 break;
113 case PIPE_INTERRUPT:
114 printk(KERN_DEBUG "%s ", "INT");
115 break;
116 case PIPE_CONTROL:
117 printk(KERN_DEBUG "%s ", "CTL");
118 break;
119 case PIPE_BULK:
120 printk(KERN_DEBUG "%s ", "BLK");
121 break;
122 default:
123 printk(KERN_DEBUG "ERR");
124 }
125
126 printk(KERN_DEBUG "\n");
127
128 }
129
130 static void usbip_dump_usb_device(struct usb_device *udev)
131 {
132 struct device *dev = &udev->dev;
133 int i;
134
135 dev_dbg(dev, " devnum(%d) devpath(%s)",
136 udev->devnum, udev->devpath);
137
138 switch (udev->speed) {
139 case USB_SPEED_HIGH:
140 printk(KERN_DEBUG " SPD_HIGH");
141 break;
142 case USB_SPEED_FULL:
143 printk(KERN_DEBUG " SPD_FULL");
144 break;
145 case USB_SPEED_LOW:
146 printk(KERN_DEBUG " SPD_LOW");
147 break;
148 case USB_SPEED_UNKNOWN:
149 printk(KERN_DEBUG " SPD_UNKNOWN");
150 break;
151 default:
152 printk(KERN_DEBUG " SPD_ERROR");
153 }
154
155 printk(KERN_DEBUG " tt %p, ttport %d", udev->tt, udev->ttport);
156 printk(KERN_DEBUG "\n");
157
158 dev_dbg(dev, " ");
159 for (i = 0; i < 16; i++)
160 printk(KERN_DEBUG " %2u", i);
161 printk(KERN_DEBUG "\n");
162
163 dev_dbg(dev, " toggle0(IN) :");
164 for (i = 0; i < 16; i++)
165 printk(KERN_DEBUG " %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
166 printk(KERN_DEBUG "\n");
167
168 dev_dbg(dev, " toggle1(OUT):");
169 for (i = 0; i < 16; i++)
170 printk(KERN_DEBUG " %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
171 printk(KERN_DEBUG "\n");
172
173
174 dev_dbg(dev, " epmaxp_in :");
175 for (i = 0; i < 16; i++) {
176 if (udev->ep_in[i])
177 printk(KERN_DEBUG " %2u",
178 le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
179 }
180 printk(KERN_DEBUG "\n");
181
182 dev_dbg(dev, " epmaxp_out :");
183 for (i = 0; i < 16; i++) {
184 if (udev->ep_out[i])
185 printk(KERN_DEBUG " %2u",
186 le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
187 }
188 printk(KERN_DEBUG "\n");
189
190 dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
191
192 dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
193 "rawdescriptors %p\n", &udev->descriptor, udev->config,
194 udev->actconfig, udev->rawdescriptors);
195
196 dev_dbg(dev, "have_langid %d, string_langid %d\n",
197 udev->have_langid, udev->string_langid);
198
199 dev_dbg(dev, "maxchild %d, children %p\n",
200 udev->maxchild, udev->children);
201 }
202
203 static void usbip_dump_request_type(__u8 rt)
204 {
205 switch (rt & USB_RECIP_MASK) {
206 case USB_RECIP_DEVICE:
207 printk(KERN_DEBUG "DEVICE");
208 break;
209 case USB_RECIP_INTERFACE:
210 printk(KERN_DEBUG "INTERF");
211 break;
212 case USB_RECIP_ENDPOINT:
213 printk(KERN_DEBUG "ENDPOI");
214 break;
215 case USB_RECIP_OTHER:
216 printk(KERN_DEBUG "OTHER ");
217 break;
218 default:
219 printk(KERN_DEBUG "------");
220 }
221 }
222
223 static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
224 {
225 if (!cmd) {
226 printk(KERN_DEBUG " %s : null pointer\n", __func__);
227 return;
228 }
229
230 printk(KERN_DEBUG " ");
231 printk(KERN_DEBUG "bRequestType(%02X) ", cmd->bRequestType);
232 printk(KERN_DEBUG "bRequest(%02X) " , cmd->bRequest);
233 printk(KERN_DEBUG "wValue(%04X) ", cmd->wValue);
234 printk(KERN_DEBUG "wIndex(%04X) ", cmd->wIndex);
235 printk(KERN_DEBUG "wLength(%04X) ", cmd->wLength);
236
237 printk(KERN_DEBUG "\n ");
238
239 if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
240 printk(KERN_DEBUG "STANDARD ");
241 switch (cmd->bRequest) {
242 case USB_REQ_GET_STATUS:
243 printk(KERN_DEBUG "GET_STATUS");
244 break;
245 case USB_REQ_CLEAR_FEATURE:
246 printk(KERN_DEBUG "CLEAR_FEAT");
247 break;
248 case USB_REQ_SET_FEATURE:
249 printk(KERN_DEBUG "SET_FEAT ");
250 break;
251 case USB_REQ_SET_ADDRESS:
252 printk(KERN_DEBUG "SET_ADDRRS");
253 break;
254 case USB_REQ_GET_DESCRIPTOR:
255 printk(KERN_DEBUG "GET_DESCRI");
256 break;
257 case USB_REQ_SET_DESCRIPTOR:
258 printk(KERN_DEBUG "SET_DESCRI");
259 break;
260 case USB_REQ_GET_CONFIGURATION:
261 printk(KERN_DEBUG "GET_CONFIG");
262 break;
263 case USB_REQ_SET_CONFIGURATION:
264 printk(KERN_DEBUG "SET_CONFIG");
265 break;
266 case USB_REQ_GET_INTERFACE:
267 printk(KERN_DEBUG "GET_INTERF");
268 break;
269 case USB_REQ_SET_INTERFACE:
270 printk(KERN_DEBUG "SET_INTERF");
271 break;
272 case USB_REQ_SYNCH_FRAME:
273 printk(KERN_DEBUG "SYNC_FRAME");
274 break;
275 default:
276 printk(KERN_DEBUG "REQ(%02X) ", cmd->bRequest);
277 }
278
279 printk(KERN_DEBUG " ");
280 usbip_dump_request_type(cmd->bRequestType);
281
282 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
283 printk(KERN_DEBUG "CLASS ");
284
285 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
286 printk(KERN_DEBUG "VENDOR ");
287
288 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
289 printk(KERN_DEBUG "RESERVED");
290
291 printk(KERN_DEBUG "\n");
292 }
293
294 void usbip_dump_urb(struct urb *urb)
295 {
296 struct device *dev;
297
298 if (!urb) {
299 printk(KERN_DEBUG KBUILD_MODNAME
300 ":%s: urb: null pointer!!\n", __func__);
301 return;
302 }
303
304 if (!urb->dev) {
305 printk(KERN_DEBUG KBUILD_MODNAME
306 ":%s: urb->dev: null pointer!!\n", __func__);
307 return;
308 }
309 dev = &urb->dev->dev;
310
311 dev_dbg(dev, " urb :%p\n", urb);
312 dev_dbg(dev, " dev :%p\n", urb->dev);
313
314 usbip_dump_usb_device(urb->dev);
315
316 dev_dbg(dev, " pipe :%08x ", urb->pipe);
317
318 usbip_dump_pipe(urb->pipe);
319
320 dev_dbg(dev, " status :%d\n", urb->status);
321 dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
322 dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
323 dev_dbg(dev, " transfer_buffer_length:%d\n",
324 urb->transfer_buffer_length);
325 dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
326 dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
327
328 if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
329 usbip_dump_usb_ctrlrequest(
330 (struct usb_ctrlrequest *)urb->setup_packet);
331
332 dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
333 dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
334 dev_dbg(dev, " interval :%d\n", urb->interval);
335 dev_dbg(dev, " error_count :%d\n", urb->error_count);
336 dev_dbg(dev, " context :%p\n", urb->context);
337 dev_dbg(dev, " complete :%p\n", urb->complete);
338 }
339 EXPORT_SYMBOL_GPL(usbip_dump_urb);
340
341 void usbip_dump_header(struct usbip_header *pdu)
342 {
343 usbip_udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
344 pdu->base.command,
345 pdu->base.seqnum,
346 pdu->base.devid,
347 pdu->base.direction,
348 pdu->base.ep);
349
350 switch (pdu->base.command) {
351 case USBIP_CMD_SUBMIT:
352 usbip_udbg("CMD_SUBMIT: "
353 "x_flags %u x_len %u sf %u #p %u iv %u\n",
354 pdu->u.cmd_submit.transfer_flags,
355 pdu->u.cmd_submit.transfer_buffer_length,
356 pdu->u.cmd_submit.start_frame,
357 pdu->u.cmd_submit.number_of_packets,
358 pdu->u.cmd_submit.interval);
359 break;
360 case USBIP_CMD_UNLINK:
361 usbip_udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
362 break;
363 case USBIP_RET_SUBMIT:
364 usbip_udbg("RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n",
365 pdu->u.ret_submit.status,
366 pdu->u.ret_submit.actual_length,
367 pdu->u.ret_submit.start_frame,
368 pdu->u.ret_submit.number_of_packets,
369 pdu->u.ret_submit.error_count);
370 case USBIP_RET_UNLINK:
371 usbip_udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
372 break;
373 default:
374 /* NOT REACHED */
375 usbip_udbg("UNKNOWN\n");
376 }
377 }
378 EXPORT_SYMBOL_GPL(usbip_dump_header);
379
380
381 /*-------------------------------------------------------------------------*/
382 /* thread routines */
383
384 int usbip_thread(void *param)
385 {
386 struct usbip_task *ut = param;
387
388 if (!ut)
389 return -EINVAL;
390
391 lock_kernel();
392 daemonize(ut->name);
393 allow_signal(SIGKILL);
394 ut->thread = current;
395 unlock_kernel();
396
397 /* srv.rb must wait for rx_thread starting */
398 complete(&ut->thread_done);
399
400 /* start of while loop */
401 ut->loop_ops(ut);
402
403 /* end of loop */
404 ut->thread = NULL;
405
406 complete_and_exit(&ut->thread_done, 0);
407 }
408
409 int usbip_start_threads(struct usbip_device *ud)
410 {
411 /*
412 * threads are invoked per one device (per one connection).
413 */
414 struct task_struct *th;
415
416 th = kthread_run(usbip_thread, (void *)&ud->tcp_rx, "usbip");
417 if (IS_ERR(th)) {
418 printk(KERN_WARNING
419 "Unable to start control thread\n");
420 return PTR_ERR(th);
421 }
422 th = kthread_run(usbip_thread, (void *)&ud->tcp_tx, "usbip");
423 if (IS_ERR(th)) {
424 printk(KERN_WARNING
425 "Unable to start control thread\n");
426 return PTR_ERR(th);
427 }
428
429 /* confirm threads are starting */
430 wait_for_completion(&ud->tcp_rx.thread_done);
431 wait_for_completion(&ud->tcp_tx.thread_done);
432 return 0;
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 if (ud->tcp_rx.thread != NULL) {
440 send_sig(SIGKILL, ud->tcp_rx.thread, 1);
441 wait_for_completion(&ud->tcp_rx.thread_done);
442 usbip_udbg("rx_thread for ud %p has finished\n", ud);
443 }
444
445 if (ud->tcp_tx.thread != NULL) {
446 send_sig(SIGKILL, ud->tcp_tx.thread, 1);
447 wait_for_completion(&ud->tcp_tx.thread_done);
448 usbip_udbg("tx_thread for ud %p has finished\n", ud);
449 }
450 }
451 EXPORT_SYMBOL_GPL(usbip_stop_threads);
452
453 void usbip_task_init(struct usbip_task *ut, char *name,
454 void (*loop_ops)(struct usbip_task *))
455 {
456 ut->thread = NULL;
457 init_completion(&ut->thread_done);
458 ut->name = name;
459 ut->loop_ops = loop_ops;
460 }
461 EXPORT_SYMBOL_GPL(usbip_task_init);
462
463
464 /*-------------------------------------------------------------------------*/
465 /* socket routines */
466
467 /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
468 int usbip_xmit(int send, struct socket *sock, char *buf,
469 int size, int msg_flags)
470 {
471 int result;
472 struct msghdr msg;
473 struct kvec iov;
474 int total = 0;
475
476 /* for blocks of if (usbip_dbg_flag_xmit) */
477 char *bp = buf;
478 int osize = size;
479
480 usbip_dbg_xmit("enter\n");
481
482 if (!sock || !buf || !size) {
483 printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
484 __func__, sock, buf, size);
485 return -EINVAL;
486 }
487
488
489 if (usbip_dbg_flag_xmit) {
490 if (send) {
491 if (!in_interrupt())
492 printk(KERN_DEBUG "%-10s:", current->comm);
493 else
494 printk(KERN_DEBUG "interrupt :");
495
496 printk(KERN_DEBUG "%s: sending... , sock %p, buf %p, "
497 "size %d, msg_flags %d\n", __func__,
498 sock, buf, size, msg_flags);
499 usbip_dump_buffer(buf, size);
500 }
501 }
502
503
504 do {
505 sock->sk->sk_allocation = GFP_NOIO;
506 iov.iov_base = buf;
507 iov.iov_len = size;
508 msg.msg_name = NULL;
509 msg.msg_namelen = 0;
510 msg.msg_control = NULL;
511 msg.msg_controllen = 0;
512 msg.msg_namelen = 0;
513 msg.msg_flags = msg_flags | MSG_NOSIGNAL;
514
515 if (send)
516 result = kernel_sendmsg(sock, &msg, &iov, 1, size);
517 else
518 result = kernel_recvmsg(sock, &msg, &iov, 1, size,
519 MSG_WAITALL);
520
521 if (result <= 0) {
522 usbip_udbg("usbip_xmit: %s sock %p buf %p size %u ret "
523 "%d total %d\n",
524 send ? "send" : "receive", sock, buf,
525 size, result, total);
526 goto err;
527 }
528
529 size -= result;
530 buf += result;
531 total += result;
532
533 } while (size > 0);
534
535
536 if (usbip_dbg_flag_xmit) {
537 if (!send) {
538 if (!in_interrupt())
539 printk(KERN_DEBUG "%-10s:", current->comm);
540 else
541 printk(KERN_DEBUG "interrupt :");
542
543 printk(KERN_DEBUG "usbip_xmit: receiving....\n");
544 usbip_dump_buffer(bp, osize);
545 printk(KERN_DEBUG "usbip_xmit: received, osize %d ret "
546 "%d size %d total %d\n", osize, result,
547 size, total);
548 }
549
550 if (send)
551 printk(KERN_DEBUG "usbip_xmit: send, total %d\n",
552 total);
553 }
554
555 return total;
556
557 err:
558 return result;
559 }
560 EXPORT_SYMBOL_GPL(usbip_xmit);
561
562
563 /* now a usrland utility should set options. */
564 #if 0
565 int setquickack(struct socket *socket)
566 {
567 mm_segment_t oldfs;
568 int val = 1;
569 int ret;
570
571 oldfs = get_fs();
572 set_fs(get_ds());
573 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK,
574 (char __user *) &val, sizeof(ret));
575 set_fs(oldfs);
576
577 return ret;
578 }
579
580 int setnodelay(struct socket *socket)
581 {
582 mm_segment_t oldfs;
583 int val = 1;
584 int ret;
585
586 oldfs = get_fs();
587 set_fs(get_ds());
588 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY,
589 (char __user *) &val, sizeof(ret));
590 set_fs(oldfs);
591
592 return ret;
593 }
594
595 int setkeepalive(struct socket *socket)
596 {
597 mm_segment_t oldfs;
598 int val = 1;
599 int ret;
600
601 oldfs = get_fs();
602 set_fs(get_ds());
603 ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE,
604 (char __user *) &val, sizeof(ret));
605 set_fs(oldfs);
606
607 return ret;
608 }
609
610 void setreuse(struct socket *socket)
611 {
612 socket->sk->sk_reuse = 1;
613 }
614 #endif
615
616 struct socket *sockfd_to_socket(unsigned int sockfd)
617 {
618 struct socket *socket;
619 struct file *file;
620 struct inode *inode;
621
622 file = fget(sockfd);
623 if (!file) {
624 printk(KERN_ERR "%s: invalid sockfd\n", __func__);
625 return NULL;
626 }
627
628 inode = file->f_dentry->d_inode;
629
630 if (!inode || !S_ISSOCK(inode->i_mode))
631 return NULL;
632
633 socket = SOCKET_I(inode);
634
635 return socket;
636 }
637 EXPORT_SYMBOL_GPL(sockfd_to_socket);
638
639
640
641 /*-------------------------------------------------------------------------*/
642 /* pdu routines */
643
644 /* there may be more cases to tweak the flags. */
645 static unsigned int tweak_transfer_flags(unsigned int flags)
646 {
647 flags &= ~(URB_NO_TRANSFER_DMA_MAP|URB_NO_SETUP_DMA_MAP);
648 return flags;
649 }
650
651 static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
652 int pack)
653 {
654 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
655
656 /*
657 * Some members are not still implemented in usbip. I hope this issue
658 * will be discussed when usbip is ported to other operating systems.
659 */
660 if (pack) {
661 /* vhci_tx.c */
662 spdu->transfer_flags =
663 tweak_transfer_flags(urb->transfer_flags);
664 spdu->transfer_buffer_length = urb->transfer_buffer_length;
665 spdu->start_frame = urb->start_frame;
666 spdu->number_of_packets = urb->number_of_packets;
667 spdu->interval = urb->interval;
668 } else {
669 /* stub_rx.c */
670 urb->transfer_flags = spdu->transfer_flags;
671
672 urb->transfer_buffer_length = spdu->transfer_buffer_length;
673 urb->start_frame = spdu->start_frame;
674 urb->number_of_packets = spdu->number_of_packets;
675 urb->interval = spdu->interval;
676 }
677 }
678
679 static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
680 int pack)
681 {
682 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
683
684 if (pack) {
685 /* stub_tx.c */
686
687 rpdu->status = urb->status;
688 rpdu->actual_length = urb->actual_length;
689 rpdu->start_frame = urb->start_frame;
690 rpdu->number_of_packets = urb->number_of_packets;
691 rpdu->error_count = urb->error_count;
692 } else {
693 /* vhci_rx.c */
694
695 urb->status = rpdu->status;
696 urb->actual_length = rpdu->actual_length;
697 urb->start_frame = rpdu->start_frame;
698 urb->number_of_packets = rpdu->number_of_packets;
699 urb->error_count = rpdu->error_count;
700 }
701 }
702
703
704 void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
705 int pack)
706 {
707 switch (cmd) {
708 case USBIP_CMD_SUBMIT:
709 usbip_pack_cmd_submit(pdu, urb, pack);
710 break;
711 case USBIP_RET_SUBMIT:
712 usbip_pack_ret_submit(pdu, urb, pack);
713 break;
714 default:
715 err("unknown command");
716 /* NOTREACHED */
717 /* BUG(); */
718 }
719 }
720 EXPORT_SYMBOL_GPL(usbip_pack_pdu);
721
722
723 static void correct_endian_basic(struct usbip_header_basic *base, int send)
724 {
725 if (send) {
726 base->command = cpu_to_be32(base->command);
727 base->seqnum = cpu_to_be32(base->seqnum);
728 base->devid = cpu_to_be32(base->devid);
729 base->direction = cpu_to_be32(base->direction);
730 base->ep = cpu_to_be32(base->ep);
731 } else {
732 base->command = be32_to_cpu(base->command);
733 base->seqnum = be32_to_cpu(base->seqnum);
734 base->devid = be32_to_cpu(base->devid);
735 base->direction = be32_to_cpu(base->direction);
736 base->ep = be32_to_cpu(base->ep);
737 }
738 }
739
740 static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
741 int send)
742 {
743 if (send) {
744 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
745
746 cpu_to_be32s(&pdu->transfer_buffer_length);
747 cpu_to_be32s(&pdu->start_frame);
748 cpu_to_be32s(&pdu->number_of_packets);
749 cpu_to_be32s(&pdu->interval);
750 } else {
751 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
752
753 be32_to_cpus(&pdu->transfer_buffer_length);
754 be32_to_cpus(&pdu->start_frame);
755 be32_to_cpus(&pdu->number_of_packets);
756 be32_to_cpus(&pdu->interval);
757 }
758 }
759
760 static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
761 int send)
762 {
763 if (send) {
764 cpu_to_be32s(&pdu->status);
765 cpu_to_be32s(&pdu->actual_length);
766 cpu_to_be32s(&pdu->start_frame);
767 cpu_to_be32s(&pdu->number_of_packets);
768 cpu_to_be32s(&pdu->error_count);
769 } else {
770 be32_to_cpus(&pdu->status);
771 be32_to_cpus(&pdu->actual_length);
772 be32_to_cpus(&pdu->start_frame);
773 cpu_to_be32s(&pdu->number_of_packets);
774 be32_to_cpus(&pdu->error_count);
775 }
776 }
777
778 static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
779 int send)
780 {
781 if (send)
782 pdu->seqnum = cpu_to_be32(pdu->seqnum);
783 else
784 pdu->seqnum = be32_to_cpu(pdu->seqnum);
785 }
786
787 static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
788 int send)
789 {
790 if (send)
791 cpu_to_be32s(&pdu->status);
792 else
793 be32_to_cpus(&pdu->status);
794 }
795
796 void usbip_header_correct_endian(struct usbip_header *pdu, int send)
797 {
798 __u32 cmd = 0;
799
800 if (send)
801 cmd = pdu->base.command;
802
803 correct_endian_basic(&pdu->base, send);
804
805 if (!send)
806 cmd = pdu->base.command;
807
808 switch (cmd) {
809 case USBIP_CMD_SUBMIT:
810 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
811 break;
812 case USBIP_RET_SUBMIT:
813 correct_endian_ret_submit(&pdu->u.ret_submit, send);
814 break;
815 case USBIP_CMD_UNLINK:
816 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
817 break;
818 case USBIP_RET_UNLINK:
819 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
820 break;
821 default:
822 /* NOTREACHED */
823 err("unknown command in pdu header: %d", cmd);
824 /* BUG(); */
825 }
826 }
827 EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
828
829 static void usbip_iso_pakcet_correct_endian(
830 struct usbip_iso_packet_descriptor *iso,
831 int send)
832 {
833 /* does not need all members. but copy all simply. */
834 if (send) {
835 iso->offset = cpu_to_be32(iso->offset);
836 iso->length = cpu_to_be32(iso->length);
837 iso->status = cpu_to_be32(iso->status);
838 iso->actual_length = cpu_to_be32(iso->actual_length);
839 } else {
840 iso->offset = be32_to_cpu(iso->offset);
841 iso->length = be32_to_cpu(iso->length);
842 iso->status = be32_to_cpu(iso->status);
843 iso->actual_length = be32_to_cpu(iso->actual_length);
844 }
845 }
846
847 static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
848 struct usb_iso_packet_descriptor *uiso, int pack)
849 {
850 if (pack) {
851 iso->offset = uiso->offset;
852 iso->length = uiso->length;
853 iso->status = uiso->status;
854 iso->actual_length = uiso->actual_length;
855 } else {
856 uiso->offset = iso->offset;
857 uiso->length = iso->length;
858 uiso->status = iso->status;
859 uiso->actual_length = iso->actual_length;
860 }
861 }
862
863
864 /* must free buffer */
865 void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
866 {
867 void *buff;
868 struct usbip_iso_packet_descriptor *iso;
869 int np = urb->number_of_packets;
870 ssize_t size = np * sizeof(*iso);
871 int i;
872
873 buff = kzalloc(size, GFP_KERNEL);
874 if (!buff)
875 return NULL;
876
877 for (i = 0; i < np; i++) {
878 iso = buff + (i * sizeof(*iso));
879
880 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
881 usbip_iso_pakcet_correct_endian(iso, 1);
882 }
883
884 *bufflen = size;
885
886 return buff;
887 }
888 EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
889
890 /* some members of urb must be substituted before. */
891 int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
892 {
893 void *buff;
894 struct usbip_iso_packet_descriptor *iso;
895 int np = urb->number_of_packets;
896 int size = np * sizeof(*iso);
897 int i;
898 int ret;
899
900 if (!usb_pipeisoc(urb->pipe))
901 return 0;
902
903 /* my Bluetooth dongle gets ISO URBs which are np = 0 */
904 if (np == 0) {
905 /* usbip_uinfo("iso np == 0\n"); */
906 /* usbip_dump_urb(urb); */
907 return 0;
908 }
909
910 buff = kzalloc(size, GFP_KERNEL);
911 if (!buff)
912 return -ENOMEM;
913
914 ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
915 if (ret != size) {
916 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
917 ret);
918 kfree(buff);
919
920 if (ud->side == USBIP_STUB)
921 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
922 else
923 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
924
925 return -EPIPE;
926 }
927
928 for (i = 0; i < np; i++) {
929 iso = buff + (i * sizeof(*iso));
930
931 usbip_iso_pakcet_correct_endian(iso, 0);
932 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
933 }
934
935 kfree(buff);
936
937 return ret;
938 }
939 EXPORT_SYMBOL_GPL(usbip_recv_iso);
940
941
942 /* some members of urb must be substituted before. */
943 int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
944 {
945 int ret;
946 int size;
947
948 if (ud->side == USBIP_STUB) {
949 /* stub_rx.c */
950 /* the direction of urb must be OUT. */
951 if (usb_pipein(urb->pipe))
952 return 0;
953
954 size = urb->transfer_buffer_length;
955 } else {
956 /* vhci_rx.c */
957 /* the direction of urb must be IN. */
958 if (usb_pipeout(urb->pipe))
959 return 0;
960
961 size = urb->actual_length;
962 }
963
964 /* no need to recv xbuff */
965 if (!(size > 0))
966 return 0;
967
968 ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
969 size, 0);
970 if (ret != size) {
971 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
972 if (ud->side == USBIP_STUB) {
973 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
974 } else {
975 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
976 return -EPIPE;
977 }
978 }
979
980 return ret;
981 }
982 EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
983
984
985 /*-------------------------------------------------------------------------*/
986
987 static int __init usbip_common_init(void)
988 {
989 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
990
991 return 0;
992 }
993
994 static void __exit usbip_common_exit(void)
995 {
996 return;
997 }
998
999
1000
1001
1002 module_init(usbip_common_init);
1003 module_exit(usbip_common_exit);
1004
1005 MODULE_AUTHOR(DRIVER_AUTHOR);
1006 MODULE_DESCRIPTION(DRIVER_DESC);
1007 MODULE_LICENSE("GPL");
WandBoard kernel