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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
[mirror_ubuntu-bionic-kernel.git] / drivers / staging / usbip / usbip_common.c
CommitLineData
05a1f28e
TH		 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
35unsigned long usbip_debug_flag = 0xffffffff;
36#else
37unsigned long usbip_debug_flag;
38#endif
39EXPORT_SYMBOL_GPL(usbip_debug_flag);
40
41
42/* FIXME */
43struct device_attribute dev_attr_usbip_debug;
44EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
45
46
47static 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
53static 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}
63DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
64
65static 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
96static 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
128static 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
201static 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
221static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
222{
223 if (!cmd) {
224 printk(" %s : null pointer\n", __FUNCTION__);
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
292void 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}
336EXPORT_SYMBOL_GPL(usbip_dump_urb);
337
338void 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}
373EXPORT_SYMBOL_GPL(usbip_dump_header);
374
375
376/*-------------------------------------------------------------------------*/
377/* thread routines */
378
379int 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
404void usbip_start_threads(struct usbip_device *ud)
405{
406 /*
407 * threads are invoked per one device (per one connection).
408 */
409 kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
410 kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
411
412 /* confirm threads are starting */
413 wait_for_completion(&ud->tcp_rx.thread_done);
414 wait_for_completion(&ud->tcp_tx.thread_done);
415}
416EXPORT_SYMBOL_GPL(usbip_start_threads);
417
418void usbip_stop_threads(struct usbip_device *ud)
419{
420 /* kill threads related to this sdev, if v.c. exists */
421 if (ud->tcp_rx.thread != NULL) {
422 send_sig(SIGKILL, ud->tcp_rx.thread, 1);
423 wait_for_completion(&ud->tcp_rx.thread_done);
424 udbg("rx_thread for ud %p has finished\n", ud);
425 }
426
427 if (ud->tcp_tx.thread != NULL) {
428 send_sig(SIGKILL, ud->tcp_tx.thread, 1);
429 wait_for_completion(&ud->tcp_tx.thread_done);
430 udbg("tx_thread for ud %p has finished\n", ud);
431 }
432}
433EXPORT_SYMBOL_GPL(usbip_stop_threads);
434
435void usbip_task_init(struct usbip_task *ut, char *name,
436 void (*loop_ops)(struct usbip_task *))
437{
438 ut->thread = NULL;
439 init_completion(&ut->thread_done);
440 ut->name = name;
441 ut->loop_ops = loop_ops;
442}
443EXPORT_SYMBOL_GPL(usbip_task_init);
444
445
446/*-------------------------------------------------------------------------*/
447/* socket routines */
448
449 /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
450int usbip_xmit(int send, struct socket *sock, char *buf,
451 int size, int msg_flags)
452{
453 int result;
454 struct msghdr msg;
455 struct kvec iov;
456 int total = 0;
457
458 /* for blocks of if (dbg_flag_xmit) */
459 char *bp = buf;
460 int osize = size;
461
462 dbg_xmit("enter\n");
463
464 if (!sock || !buf || !size) {
465 printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
466 __func__, sock, buf, size);
467 return -EINVAL;
468 }
469
470
471 if (dbg_flag_xmit) {
472 if (send) {
473 if (!in_interrupt())
474 printk(KERN_DEBUG "%-10s:", current->comm);
475 else
476 printk(KERN_DEBUG "interupt :");
477
478 printk("%s: sending... , sock %p, buf %p, "
479 "size %d, msg_flags %d\n", __func__,
480 sock, buf, size, msg_flags);
481 usbip_dump_buffer(buf, size);
482 }
483 }
484
485
486 do {
487 sock->sk->sk_allocation = GFP_NOIO;
488 iov.iov_base = buf;
489 iov.iov_len = size;
490 msg.msg_name = NULL;
491 msg.msg_namelen = 0;
492 msg.msg_control = NULL;
493 msg.msg_controllen = 0;
494 msg.msg_namelen = 0;
495 msg.msg_flags = msg_flags | MSG_NOSIGNAL;
496
497 if (send)
498 result = kernel_sendmsg(sock, &msg, &iov, 1, size);
499 else
500 result = kernel_recvmsg(sock, &msg, &iov, 1, size,
501 MSG_WAITALL);
502
503 if (result <= 0) {
504 udbg("usbip_xmit: %s sock %p buf %p size %u ret %d"
505 " total %d\n",
506 send ? "send" : "receive", sock, buf,
507 size, result, total);
508 goto err;
509 }
510
511 size -= result;
512 buf += result;
513 total += result;
514
515 } while (size > 0);
516
517
518 if (dbg_flag_xmit) {
519 if (!send) {
520 if (!in_interrupt())
521 printk(KERN_DEBUG "%-10s:", current->comm);
522 else
523 printk(KERN_DEBUG "interupt :");
524
525 printk("usbip_xmit: receiving....\n");
526 usbip_dump_buffer(bp, osize);
527 printk("usbip_xmit: received, osize %d ret %d size %d "
528 "total %d\n", osize, result, size,
529 total);
530 }
531
532 if (send)
533 printk("usbip_xmit: send, total %d\n", total);
534 }
535
536 return total;
537
538err:
539 return result;
540}
541EXPORT_SYMBOL_GPL(usbip_xmit);
542
543
544/* now a usrland utility should set options. */
545#if 0
546int setquickack(struct socket *socket)
547{
548 mm_segment_t oldfs;
549 int val = 1;
550 int ret;
551
552 oldfs = get_fs();
553 set_fs(get_ds());
554 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK,
555 (char __user *) &val, sizeof(ret));
556 set_fs(oldfs);
557
558 return ret;
559}
560
561int setnodelay(struct socket *socket)
562{
563 mm_segment_t oldfs;
564 int val = 1;
565 int ret;
566
567 oldfs = get_fs();
568 set_fs(get_ds());
569 ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY,
570 (char __user *) &val, sizeof(ret));
571 set_fs(oldfs);
572
573 return ret;
574}
575
576int setkeepalive(struct socket *socket)
577{
578 mm_segment_t oldfs;
579 int val = 1;
580 int ret;
581
582 oldfs = get_fs();
583 set_fs(get_ds());
584 ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE,
585 (char __user *) &val, sizeof(ret));
586 set_fs(oldfs);
587
588 return ret;
589}
590
591void setreuse(struct socket *socket)
592{
593 socket->sk->sk_reuse = 1;
594}
595#endif
596
597struct socket *sockfd_to_socket(unsigned int sockfd)
598{
599 struct socket *socket;
600 struct file *file;
601 struct inode *inode;
602
603 file = fget(sockfd);
604 if (!file) {
605 printk(KERN_ERR "%s: invalid sockfd\n", __func__);
606 return NULL;
607 }
608
609 inode = file->f_dentry->d_inode;
610
611 if (!inode || !S_ISSOCK(inode->i_mode))
612 return NULL;
613
614 socket = SOCKET_I(inode);
615
616 return socket;
617}
618EXPORT_SYMBOL_GPL(sockfd_to_socket);
619
620
621
622/*-------------------------------------------------------------------------*/
623/* pdu routines */
624
625/* there may be more cases to tweak the flags. */
626static unsigned int tweak_transfer_flags(unsigned int flags)
627{
628
629 if (flags & URB_NO_TRANSFER_DMA_MAP)
630 /*
631 * vhci_hcd does not provide DMA-mapped I/O. The upper
632 * driver does not need to set this flag. The remote
633 * usbip.ko does not still perform DMA-mapped I/O for
634 * DMA-caplable host controllers. So, clear this flag.
635 */
636 flags &= ~URB_NO_TRANSFER_DMA_MAP;
637
638 if (flags & URB_NO_SETUP_DMA_MAP)
639 flags &= ~URB_NO_SETUP_DMA_MAP;
640
641 return flags;
642}
643
644static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
645 int pack)
646{
647 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
648
649 /*
650 * Some members are not still implemented in usbip. I hope this issue
651 * will be discussed when usbip is ported to other operating systems.
652 */
653 if (pack) {
654 /* vhci_tx.c */
655 spdu->transfer_flags =
656 tweak_transfer_flags(urb->transfer_flags);
657 spdu->transfer_buffer_length = urb->transfer_buffer_length;
658 spdu->start_frame = urb->start_frame;
659 spdu->number_of_packets = urb->number_of_packets;
660 spdu->interval = urb->interval;
661 } else {
662 /* stub_rx.c */
663 urb->transfer_flags = spdu->transfer_flags;
664
665 urb->transfer_buffer_length = spdu->transfer_buffer_length;
666 urb->start_frame = spdu->start_frame;
667 urb->number_of_packets = spdu->number_of_packets;
668 urb->interval = spdu->interval;
669 }
670}
671
672static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
673 int pack)
674{
675 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
676
677 if (pack) {
678 /* stub_tx.c */
679
680 rpdu->status = urb->status;
681 rpdu->actual_length = urb->actual_length;
682 rpdu->start_frame = urb->start_frame;
683 rpdu->error_count = urb->error_count;
684 } else {
685 /* vhci_rx.c */
686
687 urb->status = rpdu->status;
688 urb->actual_length = rpdu->actual_length;
689 urb->start_frame = rpdu->start_frame;
690 urb->error_count = rpdu->error_count;
691 }
692}
693
694
695void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
696 int pack)
697{
698 switch (cmd) {
699 case USBIP_CMD_SUBMIT:
700 usbip_pack_cmd_submit(pdu, urb, pack);
701 break;
702 case USBIP_RET_SUBMIT:
703 usbip_pack_ret_submit(pdu, urb, pack);
704 break;
705 default:
706 err("unknown command");
707 /* NOTREACHED */
708 /* BUG(); */
709 }
710}
711EXPORT_SYMBOL_GPL(usbip_pack_pdu);
712
713
714static void correct_endian_basic(struct usbip_header_basic *base, int send)
715{
716 if (send) {
717 base->command = cpu_to_be32(base->command);
718 base->seqnum = cpu_to_be32(base->seqnum);
719 base->devid = cpu_to_be32(base->devid);
720 base->direction = cpu_to_be32(base->direction);
721 base->ep = cpu_to_be32(base->ep);
722 } else {
723 base->command = be32_to_cpu(base->command);
724 base->seqnum = be32_to_cpu(base->seqnum);
725 base->devid = be32_to_cpu(base->devid);
726 base->direction = be32_to_cpu(base->direction);
727 base->ep = be32_to_cpu(base->ep);
728 }
729}
730
731static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
732 int send)
733{
734 if (send) {
735 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
736
737 cpu_to_be32s(&pdu->transfer_buffer_length);
738 cpu_to_be32s(&pdu->start_frame);
739 cpu_to_be32s(&pdu->number_of_packets);
740 cpu_to_be32s(&pdu->interval);
741 } else {
742 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
743
744 be32_to_cpus(&pdu->transfer_buffer_length);
745 be32_to_cpus(&pdu->start_frame);
746 be32_to_cpus(&pdu->number_of_packets);
747 be32_to_cpus(&pdu->interval);
748 }
749}
750
751static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
752 int send)
753{
754 if (send) {
755 cpu_to_be32s(&pdu->status);
756 cpu_to_be32s(&pdu->actual_length);
757 cpu_to_be32s(&pdu->start_frame);
758 cpu_to_be32s(&pdu->error_count);
759 } else {
760 be32_to_cpus(&pdu->status);
761 be32_to_cpus(&pdu->actual_length);
762 be32_to_cpus(&pdu->start_frame);
763 be32_to_cpus(&pdu->error_count);
764 }
765}
766
767static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
768 int send)
769{
770 if (send)
771 pdu->seqnum = cpu_to_be32(pdu->seqnum);
772 else
773 pdu->seqnum = be32_to_cpu(pdu->seqnum);
774}
775
776static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
777 int send)
778{
779 if (send)
780 cpu_to_be32s(&pdu->status);
781 else
782 be32_to_cpus(&pdu->status);
783}
784
785void usbip_header_correct_endian(struct usbip_header *pdu, int send)
786{
787 __u32 cmd = 0;
788
789 if (send)
790 cmd = pdu->base.command;
791
792 correct_endian_basic(&pdu->base, send);
793
794 if (!send)
795 cmd = pdu->base.command;
796
797 switch (cmd) {
798 case USBIP_CMD_SUBMIT:
799 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
800 break;
801 case USBIP_RET_SUBMIT:
802 correct_endian_ret_submit(&pdu->u.ret_submit, send);
803 break;
804 case USBIP_CMD_UNLINK:
805 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
806 break;
807 case USBIP_RET_UNLINK:
808 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
809 break;
810 default:
811 /* NOTREACHED */
812 err("unknown command in pdu header: %d", cmd);
813 /* BUG(); */
814 }
815}
816EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
817
818static void usbip_iso_pakcet_correct_endian(
819 struct usbip_iso_packet_descriptor *iso,
820 int send)
821{
822 /* does not need all members. but copy all simply. */
823 if (send) {
824 iso->offset = cpu_to_be32(iso->offset);
825 iso->length = cpu_to_be32(iso->length);
826 iso->status = cpu_to_be32(iso->status);
827 iso->actual_length = cpu_to_be32(iso->actual_length);
828 } else {
829 iso->offset = be32_to_cpu(iso->offset);
830 iso->length = be32_to_cpu(iso->length);
831 iso->status = be32_to_cpu(iso->status);
832 iso->actual_length = be32_to_cpu(iso->actual_length);
833 }
834}
835
836static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
837 struct usb_iso_packet_descriptor *uiso, int pack)
838{
839 if (pack) {
840 iso->offset = uiso->offset;
841 iso->length = uiso->length;
842 iso->status = uiso->status;
843 iso->actual_length = uiso->actual_length;
844 } else {
845 uiso->offset = iso->offset;
846 uiso->length = iso->length;
847 uiso->status = iso->status;
848 uiso->actual_length = iso->actual_length;
849 }
850}
851
852
853/* must free buffer */
854void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
855{
856 void *buff;
857 struct usbip_iso_packet_descriptor *iso;
858 int np = urb->number_of_packets;
859 ssize_t size = np * sizeof(*iso);
860 int i;
861
862 buff = kzalloc(size, GFP_KERNEL);
863 if (!buff)
864 return NULL;
865
866 for (i = 0; i < np; i++) {
867 iso = buff + (i * sizeof(*iso));
868
869 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
870 usbip_iso_pakcet_correct_endian(iso, 1);
871 }
872
873 *bufflen = size;
874
875 return buff;
876}
877EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
878
879/* some members of urb must be substituted before. */
880int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
881{
882 void *buff;
883 struct usbip_iso_packet_descriptor *iso;
884 int np = urb->number_of_packets;
885 int size = np * sizeof(*iso);
886 int i;
887 int ret;
888
889 if (!usb_pipeisoc(urb->pipe))
890 return 0;
891
892 /* my Bluetooth dongle gets ISO URBs which are np = 0 */
893 if (np == 0) {
894 /* uinfo("iso np == 0\n"); */
895 /* usbip_dump_urb(urb); */
896 return 0;
897 }
898
899 buff = kzalloc(size, GFP_KERNEL);
900 if (!buff)
901 return -ENOMEM;
902
903 ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
904 if (ret != size) {
905 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
906 ret);
907 kfree(buff);
908
909 if (ud->side == USBIP_STUB)
910 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
911 else
912 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
913
914 return -EPIPE;
915 }
916
917 for (i = 0; i < np; i++) {
918 iso = buff + (i * sizeof(*iso));
919
920 usbip_iso_pakcet_correct_endian(iso, 0);
921 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
922 }
923
924
925 kfree(buff);
926
927 return ret;
928}
929EXPORT_SYMBOL_GPL(usbip_recv_iso);
930
931
932/* some members of urb must be substituted before. */
933int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
934{
935 int ret;
936 int size;
937
938 if (ud->side == USBIP_STUB) {
939 /* stub_rx.c */
940 /* the direction of urb must be OUT. */
941 if (usb_pipein(urb->pipe))
942 return 0;
943
944 size = urb->transfer_buffer_length;
945 } else {
946 /* vhci_rx.c */
947 /* the direction of urb must be IN. */
948 if (usb_pipeout(urb->pipe))
949 return 0;
950
951 size = urb->actual_length;
952 }
953
954 /* no need to recv xbuff */
955 if (!(size > 0))
956 return 0;
957
958 ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
959 size, 0);
960 if (ret != size) {
961 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
962 if (ud->side == USBIP_STUB) {
963 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
964 } else {
965 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
966 return -EPIPE;
967 }
968 }
969
970 return ret;
971}
972EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
973
974
975/*-------------------------------------------------------------------------*/
976
977static int __init usbip_common_init(void)
978{
979 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
980
981 return 0;
982}
983
984static void __exit usbip_common_exit(void)
985{
986 return;
987}
988
989
990
991
992module_init(usbip_common_init);
993module_exit(usbip_common_exit);
994
995MODULE_AUTHOR(DRIVER_AUTHOR);
996MODULE_DESCRIPTION(DRIVER_DESC);
997MODULE_LICENSE("GPL");
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