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hugetlb: move refcounting in hugepage allocation inside hugetlb_lock
[linux/fpc-iii.git] / drivers / usb / gadget / rndis.c
blob972d5ddd1e18043f23281b3282681c6c9eb0ea62
1 /*
2 * RNDIS MSG parser
3 *
4 * Authors: Benedikt Spranger, Pengutronix
5 * Robert Schwebel, Pengutronix
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This software was originally developed in conformance with
12 * Microsoft's Remote NDIS Specification License Agreement.
13 *
14 * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
15 * Fixed message length bug in init_response
16 *
17 * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
18 * Fixed rndis_rm_hdr length bug.
19 *
20 * Copyright (C) 2004 by David Brownell
21 * updates to merge with Linux 2.6, better match RNDIS spec
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/kernel.h>
27 #include <linux/errno.h>
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/proc_fs.h>
31 #include <linux/slab.h>
32 #include <linux/seq_file.h>
33 #include <linux/netdevice.h>
34
35 #include <asm/io.h>
36 #include <asm/byteorder.h>
37 #include <asm/system.h>
38 #include <asm/unaligned.h>
39
40
41 #undef VERBOSE_DEBUG
42
43 #include "rndis.h"
44
45
46 /* The driver for your USB chip needs to support ep0 OUT to work with
47 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
48 *
49 * Windows hosts need an INF file like Documentation/usb/linux.inf
50 * and will be happier if you provide the host_addr module parameter.
51 */
52
53 #if 0
54 static int rndis_debug = 0;
55 module_param (rndis_debug, int, 0);
56 MODULE_PARM_DESC (rndis_debug, "enable debugging");
57 #else
58 #define rndis_debug 0
59 #endif
60
61 #define RNDIS_MAX_CONFIGS 1
62
63
64 static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];
65
66 /* Driver Version */
67 static const __le32 rndis_driver_version = cpu_to_le32 (1);
68
69 /* Function Prototypes */
70 static rndis_resp_t *rndis_add_response (int configNr, u32 length);
71
72
73 /* supported OIDs */
74 static const u32 oid_supported_list [] =
75 {
76 /* the general stuff */
77 OID_GEN_SUPPORTED_LIST,
78 OID_GEN_HARDWARE_STATUS,
79 OID_GEN_MEDIA_SUPPORTED,
80 OID_GEN_MEDIA_IN_USE,
81 OID_GEN_MAXIMUM_FRAME_SIZE,
82 OID_GEN_LINK_SPEED,
83 OID_GEN_TRANSMIT_BLOCK_SIZE,
84 OID_GEN_RECEIVE_BLOCK_SIZE,
85 OID_GEN_VENDOR_ID,
86 OID_GEN_VENDOR_DESCRIPTION,
87 OID_GEN_VENDOR_DRIVER_VERSION,
88 OID_GEN_CURRENT_PACKET_FILTER,
89 OID_GEN_MAXIMUM_TOTAL_SIZE,
90 OID_GEN_MEDIA_CONNECT_STATUS,
91 OID_GEN_PHYSICAL_MEDIUM,
92
93 /* the statistical stuff */
94 OID_GEN_XMIT_OK,
95 OID_GEN_RCV_OK,
96 OID_GEN_XMIT_ERROR,
97 OID_GEN_RCV_ERROR,
98 OID_GEN_RCV_NO_BUFFER,
99 #ifdef RNDIS_OPTIONAL_STATS
100 OID_GEN_DIRECTED_BYTES_XMIT,
101 OID_GEN_DIRECTED_FRAMES_XMIT,
102 OID_GEN_MULTICAST_BYTES_XMIT,
103 OID_GEN_MULTICAST_FRAMES_XMIT,
104 OID_GEN_BROADCAST_BYTES_XMIT,
105 OID_GEN_BROADCAST_FRAMES_XMIT,
106 OID_GEN_DIRECTED_BYTES_RCV,
107 OID_GEN_DIRECTED_FRAMES_RCV,
108 OID_GEN_MULTICAST_BYTES_RCV,
109 OID_GEN_MULTICAST_FRAMES_RCV,
110 OID_GEN_BROADCAST_BYTES_RCV,
111 OID_GEN_BROADCAST_FRAMES_RCV,
112 OID_GEN_RCV_CRC_ERROR,
113 OID_GEN_TRANSMIT_QUEUE_LENGTH,
114 #endif /* RNDIS_OPTIONAL_STATS */
115
116 /* mandatory 802.3 */
117 /* the general stuff */
118 OID_802_3_PERMANENT_ADDRESS,
119 OID_802_3_CURRENT_ADDRESS,
120 OID_802_3_MULTICAST_LIST,
121 OID_802_3_MAC_OPTIONS,
122 OID_802_3_MAXIMUM_LIST_SIZE,
123
124 /* the statistical stuff */
125 OID_802_3_RCV_ERROR_ALIGNMENT,
126 OID_802_3_XMIT_ONE_COLLISION,
127 OID_802_3_XMIT_MORE_COLLISIONS,
128 #ifdef RNDIS_OPTIONAL_STATS
129 OID_802_3_XMIT_DEFERRED,
130 OID_802_3_XMIT_MAX_COLLISIONS,
131 OID_802_3_RCV_OVERRUN,
132 OID_802_3_XMIT_UNDERRUN,
133 OID_802_3_XMIT_HEARTBEAT_FAILURE,
134 OID_802_3_XMIT_TIMES_CRS_LOST,
135 OID_802_3_XMIT_LATE_COLLISIONS,
136 #endif /* RNDIS_OPTIONAL_STATS */
137
138 #ifdef RNDIS_PM
139 /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
140 * don't say what they mean ... and the NDIS specs are often
141 * confusing and/or ambiguous in this context. (That is, more
142 * so than their specs for the other OIDs.)
143 *
144 * FIXME someone who knows what these should do, please
145 * implement them!
146 */
147
148 /* power management */
149 OID_PNP_CAPABILITIES,
150 OID_PNP_QUERY_POWER,
151 OID_PNP_SET_POWER,
152
153 #ifdef RNDIS_WAKEUP
154 /* wake up host */
155 OID_PNP_ENABLE_WAKE_UP,
156 OID_PNP_ADD_WAKE_UP_PATTERN,
157 OID_PNP_REMOVE_WAKE_UP_PATTERN,
158 #endif /* RNDIS_WAKEUP */
159 #endif /* RNDIS_PM */
160 };
161
162
163 /* NDIS Functions */
164 static int
165 gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
166 rndis_resp_t *r)
167 {
168 int retval = -ENOTSUPP;
169 u32 length = 4; /* usually */
170 __le32 *outbuf;
171 int i, count;
172 rndis_query_cmplt_type *resp;
173 struct net_device *net;
174 struct rtnl_link_stats64 temp;
175 const struct rtnl_link_stats64 *stats;
176
177 if (!r) return -ENOMEM;
178 resp = (rndis_query_cmplt_type *) r->buf;
179
180 if (!resp) return -ENOMEM;
181
182 if (buf_len && rndis_debug > 1) {
183 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
184 for (i = 0; i < buf_len; i += 16) {
185 pr_debug("%03d: %08x %08x %08x %08x\n", i,
186 get_unaligned_le32(&buf[i]),
187 get_unaligned_le32(&buf[i + 4]),
188 get_unaligned_le32(&buf[i + 8]),
189 get_unaligned_le32(&buf[i + 12]));
190 }
191 }
192
193 /* response goes here, right after the header */
194 outbuf = (__le32 *) &resp[1];
195 resp->InformationBufferOffset = cpu_to_le32 (16);
196
197 net = rndis_per_dev_params[configNr].dev;
198 stats = dev_get_stats(net, &temp);
199
200 switch (OID) {
201
202 /* general oids (table 4-1) */
203
204 /* mandatory */
205 case OID_GEN_SUPPORTED_LIST:
206 pr_debug("%s: OID_GEN_SUPPORTED_LIST\n", __func__);
207 length = sizeof (oid_supported_list);
208 count = length / sizeof (u32);
209 for (i = 0; i < count; i++)
210 outbuf[i] = cpu_to_le32 (oid_supported_list[i]);
211 retval = 0;
212 break;
213
214 /* mandatory */
215 case OID_GEN_HARDWARE_STATUS:
216 pr_debug("%s: OID_GEN_HARDWARE_STATUS\n", __func__);
217 /* Bogus question!
218 * Hardware must be ready to receive high level protocols.
219 * BTW:
220 * reddite ergo quae sunt Caesaris Caesari
221 * et quae sunt Dei Deo!
222 */
223 *outbuf = cpu_to_le32 (0);
224 retval = 0;
225 break;
226
227 /* mandatory */
228 case OID_GEN_MEDIA_SUPPORTED:
229 pr_debug("%s: OID_GEN_MEDIA_SUPPORTED\n", __func__);
230 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
231 retval = 0;
232 break;
233
234 /* mandatory */
235 case OID_GEN_MEDIA_IN_USE:
236 pr_debug("%s: OID_GEN_MEDIA_IN_USE\n", __func__);
237 /* one medium, one transport... (maybe you do it better) */
238 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
239 retval = 0;
240 break;
241
242 /* mandatory */
243 case OID_GEN_MAXIMUM_FRAME_SIZE:
244 pr_debug("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
245 if (rndis_per_dev_params [configNr].dev) {
246 *outbuf = cpu_to_le32 (
247 rndis_per_dev_params [configNr].dev->mtu);
248 retval = 0;
249 }
250 break;
251
252 /* mandatory */
253 case OID_GEN_LINK_SPEED:
254 if (rndis_debug > 1)
255 pr_debug("%s: OID_GEN_LINK_SPEED\n", __func__);
256 if (rndis_per_dev_params [configNr].media_state
257 == NDIS_MEDIA_STATE_DISCONNECTED)
258 *outbuf = cpu_to_le32 (0);
259 else
260 *outbuf = cpu_to_le32 (
261 rndis_per_dev_params [configNr].speed);
262 retval = 0;
263 break;
264
265 /* mandatory */
266 case OID_GEN_TRANSMIT_BLOCK_SIZE:
267 pr_debug("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
268 if (rndis_per_dev_params [configNr].dev) {
269 *outbuf = cpu_to_le32 (
270 rndis_per_dev_params [configNr].dev->mtu);
271 retval = 0;
272 }
273 break;
274
275 /* mandatory */
276 case OID_GEN_RECEIVE_BLOCK_SIZE:
277 pr_debug("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
278 if (rndis_per_dev_params [configNr].dev) {
279 *outbuf = cpu_to_le32 (
280 rndis_per_dev_params [configNr].dev->mtu);
281 retval = 0;
282 }
283 break;
284
285 /* mandatory */
286 case OID_GEN_VENDOR_ID:
287 pr_debug("%s: OID_GEN_VENDOR_ID\n", __func__);
288 *outbuf = cpu_to_le32 (
289 rndis_per_dev_params [configNr].vendorID);
290 retval = 0;
291 break;
292
293 /* mandatory */
294 case OID_GEN_VENDOR_DESCRIPTION:
295 pr_debug("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__);
296 if ( rndis_per_dev_params [configNr].vendorDescr ) {
297 length = strlen (rndis_per_dev_params [configNr].vendorDescr);
298 memcpy (outbuf,
299 rndis_per_dev_params [configNr].vendorDescr, length);
300 } else {
301 outbuf[0] = 0;
302 }
303 retval = 0;
304 break;
305
306 case OID_GEN_VENDOR_DRIVER_VERSION:
307 pr_debug("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
308 /* Created as LE */
309 *outbuf = rndis_driver_version;
310 retval = 0;
311 break;
312
313 /* mandatory */
314 case OID_GEN_CURRENT_PACKET_FILTER:
315 pr_debug("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
316 *outbuf = cpu_to_le32 (*rndis_per_dev_params[configNr].filter);
317 retval = 0;
318 break;
319
320 /* mandatory */
321 case OID_GEN_MAXIMUM_TOTAL_SIZE:
322 pr_debug("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
323 *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
324 retval = 0;
325 break;
326
327 /* mandatory */
328 case OID_GEN_MEDIA_CONNECT_STATUS:
329 if (rndis_debug > 1)
330 pr_debug("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
331 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
332 .media_state);
333 retval = 0;
334 break;
335
336 case OID_GEN_PHYSICAL_MEDIUM:
337 pr_debug("%s: OID_GEN_PHYSICAL_MEDIUM\n", __func__);
338 *outbuf = cpu_to_le32 (0);
339 retval = 0;
340 break;
341
342 /* The RNDIS specification is incomplete/wrong. Some versions
343 * of MS-Windows expect OIDs that aren't specified there. Other
344 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
345 */
346 case OID_GEN_MAC_OPTIONS: /* from WinME */
347 pr_debug("%s: OID_GEN_MAC_OPTIONS\n", __func__);
348 *outbuf = cpu_to_le32(
349 NDIS_MAC_OPTION_RECEIVE_SERIALIZED
350 | NDIS_MAC_OPTION_FULL_DUPLEX);
351 retval = 0;
352 break;
353
354 /* statistics OIDs (table 4-2) */
355
356 /* mandatory */
357 case OID_GEN_XMIT_OK:
358 if (rndis_debug > 1)
359 pr_debug("%s: OID_GEN_XMIT_OK\n", __func__);
360 if (stats) {
361 *outbuf = cpu_to_le32(stats->tx_packets
362 - stats->tx_errors - stats->tx_dropped);
363 retval = 0;
364 }
365 break;
366
367 /* mandatory */
368 case OID_GEN_RCV_OK:
369 if (rndis_debug > 1)
370 pr_debug("%s: OID_GEN_RCV_OK\n", __func__);
371 if (stats) {
372 *outbuf = cpu_to_le32(stats->rx_packets
373 - stats->rx_errors - stats->rx_dropped);
374 retval = 0;
375 }
376 break;
377
378 /* mandatory */
379 case OID_GEN_XMIT_ERROR:
380 if (rndis_debug > 1)
381 pr_debug("%s: OID_GEN_XMIT_ERROR\n", __func__);
382 if (stats) {
383 *outbuf = cpu_to_le32(stats->tx_errors);
384 retval = 0;
385 }
386 break;
387
388 /* mandatory */
389 case OID_GEN_RCV_ERROR:
390 if (rndis_debug > 1)
391 pr_debug("%s: OID_GEN_RCV_ERROR\n", __func__);
392 if (stats) {
393 *outbuf = cpu_to_le32(stats->rx_errors);
394 retval = 0;
395 }
396 break;
397
398 /* mandatory */
399 case OID_GEN_RCV_NO_BUFFER:
400 pr_debug("%s: OID_GEN_RCV_NO_BUFFER\n", __func__);
401 if (stats) {
402 *outbuf = cpu_to_le32(stats->rx_dropped);
403 retval = 0;
404 }
405 break;
406
407 /* ieee802.3 OIDs (table 4-3) */
408
409 /* mandatory */
410 case OID_802_3_PERMANENT_ADDRESS:
411 pr_debug("%s: OID_802_3_PERMANENT_ADDRESS\n", __func__);
412 if (rndis_per_dev_params [configNr].dev) {
413 length = ETH_ALEN;
414 memcpy (outbuf,
415 rndis_per_dev_params [configNr].host_mac,
416 length);
417 retval = 0;
418 }
419 break;
420
421 /* mandatory */
422 case OID_802_3_CURRENT_ADDRESS:
423 pr_debug("%s: OID_802_3_CURRENT_ADDRESS\n", __func__);
424 if (rndis_per_dev_params [configNr].dev) {
425 length = ETH_ALEN;
426 memcpy (outbuf,
427 rndis_per_dev_params [configNr].host_mac,
428 length);
429 retval = 0;
430 }
431 break;
432
433 /* mandatory */
434 case OID_802_3_MULTICAST_LIST:
435 pr_debug("%s: OID_802_3_MULTICAST_LIST\n", __func__);
436 /* Multicast base address only */
437 *outbuf = cpu_to_le32 (0xE0000000);
438 retval = 0;
439 break;
440
441 /* mandatory */
442 case OID_802_3_MAXIMUM_LIST_SIZE:
443 pr_debug("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
444 /* Multicast base address only */
445 *outbuf = cpu_to_le32 (1);
446 retval = 0;
447 break;
448
449 case OID_802_3_MAC_OPTIONS:
450 pr_debug("%s: OID_802_3_MAC_OPTIONS\n", __func__);
451 *outbuf = cpu_to_le32(0);
452 retval = 0;
453 break;
454
455 /* ieee802.3 statistics OIDs (table 4-4) */
456
457 /* mandatory */
458 case OID_802_3_RCV_ERROR_ALIGNMENT:
459 pr_debug("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
460 if (stats) {
461 *outbuf = cpu_to_le32(stats->rx_frame_errors);
462 retval = 0;
463 }
464 break;
465
466 /* mandatory */
467 case OID_802_3_XMIT_ONE_COLLISION:
468 pr_debug("%s: OID_802_3_XMIT_ONE_COLLISION\n", __func__);
469 *outbuf = cpu_to_le32 (0);
470 retval = 0;
471 break;
472
473 /* mandatory */
474 case OID_802_3_XMIT_MORE_COLLISIONS:
475 pr_debug("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
476 *outbuf = cpu_to_le32 (0);
477 retval = 0;
478 break;
479
480 default:
481 pr_warning("%s: query unknown OID 0x%08X\n",
482 __func__, OID);
483 }
484 if (retval < 0)
485 length = 0;
486
487 resp->InformationBufferLength = cpu_to_le32 (length);
488 r->length = length + sizeof *resp;
489 resp->MessageLength = cpu_to_le32 (r->length);
490 return retval;
491 }
492
493 static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len,
494 rndis_resp_t *r)
495 {
496 rndis_set_cmplt_type *resp;
497 int i, retval = -ENOTSUPP;
498 struct rndis_params *params;
499
500 if (!r)
501 return -ENOMEM;
502 resp = (rndis_set_cmplt_type *) r->buf;
503 if (!resp)
504 return -ENOMEM;
505
506 if (buf_len && rndis_debug > 1) {
507 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
508 for (i = 0; i < buf_len; i += 16) {
509 pr_debug("%03d: %08x %08x %08x %08x\n", i,
510 get_unaligned_le32(&buf[i]),
511 get_unaligned_le32(&buf[i + 4]),
512 get_unaligned_le32(&buf[i + 8]),
513 get_unaligned_le32(&buf[i + 12]));
514 }
515 }
516
517 params = &rndis_per_dev_params [configNr];
518 switch (OID) {
519 case OID_GEN_CURRENT_PACKET_FILTER:
520
521 /* these NDIS_PACKET_TYPE_* bitflags are shared with
522 * cdc_filter; it's not RNDIS-specific
523 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
524 * PROMISCUOUS, DIRECTED,
525 * MULTICAST, ALL_MULTICAST, BROADCAST
526 */
527 *params->filter = (u16)get_unaligned_le32(buf);
528 pr_debug("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
529 __func__, *params->filter);
530
531 /* this call has a significant side effect: it's
532 * what makes the packet flow start and stop, like
533 * activating the CDC Ethernet altsetting.
534 */
535 retval = 0;
536 if (*params->filter) {
537 params->state = RNDIS_DATA_INITIALIZED;
538 netif_carrier_on(params->dev);
539 if (netif_running(params->dev))
540 netif_wake_queue (params->dev);
541 } else {
542 params->state = RNDIS_INITIALIZED;
543 netif_carrier_off (params->dev);
544 netif_stop_queue (params->dev);
545 }
546 break;
547
548 case OID_802_3_MULTICAST_LIST:
549 /* I think we can ignore this */
550 pr_debug("%s: OID_802_3_MULTICAST_LIST\n", __func__);
551 retval = 0;
552 break;
553
554 default:
555 pr_warning("%s: set unknown OID 0x%08X, size %d\n",
556 __func__, OID, buf_len);
557 }
558
559 return retval;
560 }
561
562 /*
563 * Response Functions
564 */
565
566 static int rndis_init_response (int configNr, rndis_init_msg_type *buf)
567 {
568 rndis_init_cmplt_type *resp;
569 rndis_resp_t *r;
570 struct rndis_params *params = rndis_per_dev_params + configNr;
571
572 if (!params->dev)
573 return -ENOTSUPP;
574
575 r = rndis_add_response (configNr, sizeof (rndis_init_cmplt_type));
576 if (!r)
577 return -ENOMEM;
578 resp = (rndis_init_cmplt_type *) r->buf;
579
580 resp->MessageType = cpu_to_le32 (
581 REMOTE_NDIS_INITIALIZE_CMPLT);
582 resp->MessageLength = cpu_to_le32 (52);
583 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
584 resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
585 resp->MajorVersion = cpu_to_le32 (RNDIS_MAJOR_VERSION);
586 resp->MinorVersion = cpu_to_le32 (RNDIS_MINOR_VERSION);
587 resp->DeviceFlags = cpu_to_le32 (RNDIS_DF_CONNECTIONLESS);
588 resp->Medium = cpu_to_le32 (RNDIS_MEDIUM_802_3);
589 resp->MaxPacketsPerTransfer = cpu_to_le32 (1);
590 resp->MaxTransferSize = cpu_to_le32 (
591 params->dev->mtu
592 + sizeof (struct ethhdr)
593 + sizeof (struct rndis_packet_msg_type)
594 + 22);
595 resp->PacketAlignmentFactor = cpu_to_le32 (0);
596 resp->AFListOffset = cpu_to_le32 (0);
597 resp->AFListSize = cpu_to_le32 (0);
598
599 params->resp_avail(params->v);
600 return 0;
601 }
602
603 static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
604 {
605 rndis_query_cmplt_type *resp;
606 rndis_resp_t *r;
607 struct rndis_params *params = rndis_per_dev_params + configNr;
608
609 /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
610 if (!params->dev)
611 return -ENOTSUPP;
612
613 /*
614 * we need more memory:
615 * gen_ndis_query_resp expects enough space for
616 * rndis_query_cmplt_type followed by data.
617 * oid_supported_list is the largest data reply
618 */
619 r = rndis_add_response (configNr,
620 sizeof (oid_supported_list) + sizeof(rndis_query_cmplt_type));
621 if (!r)
622 return -ENOMEM;
623 resp = (rndis_query_cmplt_type *) r->buf;
624
625 resp->MessageType = cpu_to_le32 (REMOTE_NDIS_QUERY_CMPLT);
626 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
627
628 if (gen_ndis_query_resp (configNr, le32_to_cpu (buf->OID),
629 le32_to_cpu(buf->InformationBufferOffset)
630 + 8 + (u8 *) buf,
631 le32_to_cpu(buf->InformationBufferLength),
632 r)) {
633 /* OID not supported */
634 resp->Status = cpu_to_le32 (
635 RNDIS_STATUS_NOT_SUPPORTED);
636 resp->MessageLength = cpu_to_le32 (sizeof *resp);
637 resp->InformationBufferLength = cpu_to_le32 (0);
638 resp->InformationBufferOffset = cpu_to_le32 (0);
639 } else
640 resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
641
642 params->resp_avail(params->v);
643 return 0;
644 }
645
646 static int rndis_set_response (int configNr, rndis_set_msg_type *buf)
647 {
648 u32 BufLength, BufOffset;
649 rndis_set_cmplt_type *resp;
650 rndis_resp_t *r;
651 struct rndis_params *params = rndis_per_dev_params + configNr;
652
653 r = rndis_add_response (configNr, sizeof (rndis_set_cmplt_type));
654 if (!r)
655 return -ENOMEM;
656 resp = (rndis_set_cmplt_type *) r->buf;
657
658 BufLength = le32_to_cpu (buf->InformationBufferLength);
659 BufOffset = le32_to_cpu (buf->InformationBufferOffset);
660
661 #ifdef VERBOSE_DEBUG
662 pr_debug("%s: Length: %d\n", __func__, BufLength);
663 pr_debug("%s: Offset: %d\n", __func__, BufOffset);
664 pr_debug("%s: InfoBuffer: ", __func__);
665
666 for (i = 0; i < BufLength; i++) {
667 pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
668 }
669
670 pr_debug("\n");
671 #endif
672
673 resp->MessageType = cpu_to_le32 (REMOTE_NDIS_SET_CMPLT);
674 resp->MessageLength = cpu_to_le32 (16);
675 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
676 if (gen_ndis_set_resp (configNr, le32_to_cpu (buf->OID),
677 ((u8 *) buf) + 8 + BufOffset, BufLength, r))
678 resp->Status = cpu_to_le32 (RNDIS_STATUS_NOT_SUPPORTED);
679 else
680 resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
681
682 params->resp_avail(params->v);
683 return 0;
684 }
685
686 static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
687 {
688 rndis_reset_cmplt_type *resp;
689 rndis_resp_t *r;
690 struct rndis_params *params = rndis_per_dev_params + configNr;
691
692 r = rndis_add_response (configNr, sizeof (rndis_reset_cmplt_type));
693 if (!r)
694 return -ENOMEM;
695 resp = (rndis_reset_cmplt_type *) r->buf;
696
697 resp->MessageType = cpu_to_le32 (REMOTE_NDIS_RESET_CMPLT);
698 resp->MessageLength = cpu_to_le32 (16);
699 resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
700 /* resent information */
701 resp->AddressingReset = cpu_to_le32 (1);
702
703 params->resp_avail(params->v);
704 return 0;
705 }
706
707 static int rndis_keepalive_response (int configNr,
708 rndis_keepalive_msg_type *buf)
709 {
710 rndis_keepalive_cmplt_type *resp;
711 rndis_resp_t *r;
712 struct rndis_params *params = rndis_per_dev_params + configNr;
713
714 /* host "should" check only in RNDIS_DATA_INITIALIZED state */
715
716 r = rndis_add_response (configNr, sizeof (rndis_keepalive_cmplt_type));
717 if (!r)
718 return -ENOMEM;
719 resp = (rndis_keepalive_cmplt_type *) r->buf;
720
721 resp->MessageType = cpu_to_le32 (
722 REMOTE_NDIS_KEEPALIVE_CMPLT);
723 resp->MessageLength = cpu_to_le32 (16);
724 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
725 resp->Status = cpu_to_le32 (RNDIS_STATUS_SUCCESS);
726
727 params->resp_avail(params->v);
728 return 0;
729 }
730
731
732 /*
733 * Device to Host Comunication
734 */
735 static int rndis_indicate_status_msg (int configNr, u32 status)
736 {
737 rndis_indicate_status_msg_type *resp;
738 rndis_resp_t *r;
739 struct rndis_params *params = rndis_per_dev_params + configNr;
740
741 if (params->state == RNDIS_UNINITIALIZED)
742 return -ENOTSUPP;
743
744 r = rndis_add_response (configNr,
745 sizeof (rndis_indicate_status_msg_type));
746 if (!r)
747 return -ENOMEM;
748 resp = (rndis_indicate_status_msg_type *) r->buf;
749
750 resp->MessageType = cpu_to_le32 (
751 REMOTE_NDIS_INDICATE_STATUS_MSG);
752 resp->MessageLength = cpu_to_le32 (20);
753 resp->Status = cpu_to_le32 (status);
754 resp->StatusBufferLength = cpu_to_le32 (0);
755 resp->StatusBufferOffset = cpu_to_le32 (0);
756
757 params->resp_avail(params->v);
758 return 0;
759 }
760
761 int rndis_signal_connect (int configNr)
762 {
763 rndis_per_dev_params [configNr].media_state
764 = NDIS_MEDIA_STATE_CONNECTED;
765 return rndis_indicate_status_msg (configNr,
766 RNDIS_STATUS_MEDIA_CONNECT);
767 }
768
769 int rndis_signal_disconnect (int configNr)
770 {
771 rndis_per_dev_params [configNr].media_state
772 = NDIS_MEDIA_STATE_DISCONNECTED;
773 return rndis_indicate_status_msg (configNr,
774 RNDIS_STATUS_MEDIA_DISCONNECT);
775 }
776
777 void rndis_uninit (int configNr)
778 {
779 u8 *buf;
780 u32 length;
781
782 if (configNr >= RNDIS_MAX_CONFIGS)
783 return;
784 rndis_per_dev_params [configNr].state = RNDIS_UNINITIALIZED;
785
786 /* drain the response queue */
787 while ((buf = rndis_get_next_response(configNr, &length)))
788 rndis_free_response(configNr, buf);
789 }
790
791 void rndis_set_host_mac (int configNr, const u8 *addr)
792 {
793 rndis_per_dev_params [configNr].host_mac = addr;
794 }
795
796 /*
797 * Message Parser
798 */
799 int rndis_msg_parser (u8 configNr, u8 *buf)
800 {
801 u32 MsgType, MsgLength;
802 __le32 *tmp;
803 struct rndis_params *params;
804
805 if (!buf)
806 return -ENOMEM;
807
808 tmp = (__le32 *) buf;
809 MsgType = get_unaligned_le32(tmp++);
810 MsgLength = get_unaligned_le32(tmp++);
811
812 if (configNr >= RNDIS_MAX_CONFIGS)
813 return -ENOTSUPP;
814 params = &rndis_per_dev_params [configNr];
815
816 /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
817 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
818 * and normal HC level polling to see if there's any IN traffic.
819 */
820
821 /* For USB: responses may take up to 10 seconds */
822 switch (MsgType) {
823 case REMOTE_NDIS_INITIALIZE_MSG:
824 pr_debug("%s: REMOTE_NDIS_INITIALIZE_MSG\n",
825 __func__ );
826 params->state = RNDIS_INITIALIZED;
827 return rndis_init_response (configNr,
828 (rndis_init_msg_type *) buf);
829
830 case REMOTE_NDIS_HALT_MSG:
831 pr_debug("%s: REMOTE_NDIS_HALT_MSG\n",
832 __func__ );
833 params->state = RNDIS_UNINITIALIZED;
834 if (params->dev) {
835 netif_carrier_off (params->dev);
836 netif_stop_queue (params->dev);
837 }
838 return 0;
839
840 case REMOTE_NDIS_QUERY_MSG:
841 return rndis_query_response (configNr,
842 (rndis_query_msg_type *) buf);
843
844 case REMOTE_NDIS_SET_MSG:
845 return rndis_set_response (configNr,
846 (rndis_set_msg_type *) buf);
847
848 case REMOTE_NDIS_RESET_MSG:
849 pr_debug("%s: REMOTE_NDIS_RESET_MSG\n",
850 __func__ );
851 return rndis_reset_response (configNr,
852 (rndis_reset_msg_type *) buf);
853
854 case REMOTE_NDIS_KEEPALIVE_MSG:
855 /* For USB: host does this every 5 seconds */
856 if (rndis_debug > 1)
857 pr_debug("%s: REMOTE_NDIS_KEEPALIVE_MSG\n",
858 __func__ );
859 return rndis_keepalive_response (configNr,
860 (rndis_keepalive_msg_type *)
861 buf);
862
863 default:
864 /* At least Windows XP emits some undefined RNDIS messages.
865 * In one case those messages seemed to relate to the host
866 * suspending itself.
867 */
868 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
869 __func__ , MsgType, MsgLength);
870 {
871 unsigned i;
872 for (i = 0; i < MsgLength; i += 16) {
873 pr_debug("%03d: "
874 " %02x %02x %02x %02x"
875 " %02x %02x %02x %02x"
876 " %02x %02x %02x %02x"
877 " %02x %02x %02x %02x"
878 "\n",
879 i,
880 buf[i], buf [i+1],
881 buf[i+2], buf[i+3],
882 buf[i+4], buf [i+5],
883 buf[i+6], buf[i+7],
884 buf[i+8], buf [i+9],
885 buf[i+10], buf[i+11],
886 buf[i+12], buf [i+13],
887 buf[i+14], buf[i+15]);
888 }
889 }
890 break;
891 }
892
893 return -ENOTSUPP;
894 }
895
896 int rndis_register(void (*resp_avail)(void *v), void *v)
897 {
898 u8 i;
899
900 if (!resp_avail)
901 return -EINVAL;
902
903 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
904 if (!rndis_per_dev_params [i].used) {
905 rndis_per_dev_params [i].used = 1;
906 rndis_per_dev_params [i].resp_avail = resp_avail;
907 rndis_per_dev_params [i].v = v;
908 pr_debug("%s: configNr = %d\n", __func__, i);
909 return i;
910 }
911 }
912 pr_debug("failed\n");
913
914 return -ENODEV;
915 }
916
917 void rndis_deregister (int configNr)
918 {
919 pr_debug("%s: \n", __func__);
920
921 if (configNr >= RNDIS_MAX_CONFIGS) return;
922 rndis_per_dev_params [configNr].used = 0;
923
924 return;
925 }
926
927 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
928 {
929 pr_debug("%s:\n", __func__);
930 if (!dev)
931 return -EINVAL;
932 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
933
934 rndis_per_dev_params [configNr].dev = dev;
935 rndis_per_dev_params [configNr].filter = cdc_filter;
936
937 return 0;
938 }
939
940 int rndis_set_param_vendor (u8 configNr, u32 vendorID, const char *vendorDescr)
941 {
942 pr_debug("%s:\n", __func__);
943 if (!vendorDescr) return -1;
944 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
945
946 rndis_per_dev_params [configNr].vendorID = vendorID;
947 rndis_per_dev_params [configNr].vendorDescr = vendorDescr;
948
949 return 0;
950 }
951
952 int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed)
953 {
954 pr_debug("%s: %u %u\n", __func__, medium, speed);
955 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
956
957 rndis_per_dev_params [configNr].medium = medium;
958 rndis_per_dev_params [configNr].speed = speed;
959
960 return 0;
961 }
962
963 void rndis_add_hdr (struct sk_buff *skb)
964 {
965 struct rndis_packet_msg_type *header;
966
967 if (!skb)
968 return;
969 header = (void *) skb_push (skb, sizeof *header);
970 memset (header, 0, sizeof *header);
971 header->MessageType = cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
972 header->MessageLength = cpu_to_le32(skb->len);
973 header->DataOffset = cpu_to_le32 (36);
974 header->DataLength = cpu_to_le32(skb->len - sizeof *header);
975 }
976
977 void rndis_free_response (int configNr, u8 *buf)
978 {
979 rndis_resp_t *r;
980 struct list_head *act, *tmp;
981
982 list_for_each_safe (act, tmp,
983 &(rndis_per_dev_params [configNr].resp_queue))
984 {
985 r = list_entry (act, rndis_resp_t, list);
986 if (r && r->buf == buf) {
987 list_del (&r->list);
988 kfree (r);
989 }
990 }
991 }
992
993 u8 *rndis_get_next_response (int configNr, u32 *length)
994 {
995 rndis_resp_t *r;
996 struct list_head *act, *tmp;
997
998 if (!length) return NULL;
999
1000 list_for_each_safe (act, tmp,
1001 &(rndis_per_dev_params [configNr].resp_queue))
1002 {
1003 r = list_entry (act, rndis_resp_t, list);
1004 if (!r->send) {
1005 r->send = 1;
1006 *length = r->length;
1007 return r->buf;
1008 }
1009 }
1010
1011 return NULL;
1012 }
1013
1014 static rndis_resp_t *rndis_add_response (int configNr, u32 length)
1015 {
1016 rndis_resp_t *r;
1017
1018 /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
1019 r = kmalloc (sizeof (rndis_resp_t) + length, GFP_ATOMIC);
1020 if (!r) return NULL;
1021
1022 r->buf = (u8 *) (r + 1);
1023 r->length = length;
1024 r->send = 0;
1025
1026 list_add_tail (&r->list,
1027 &(rndis_per_dev_params [configNr].resp_queue));
1028 return r;
1029 }
1030
1031 int rndis_rm_hdr(struct gether *port,
1032 struct sk_buff *skb,
1033 struct sk_buff_head *list)
1034 {
1035 /* tmp points to a struct rndis_packet_msg_type */
1036 __le32 *tmp = (void *) skb->data;
1037
1038 /* MessageType, MessageLength */
1039 if (cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
1040 != get_unaligned(tmp++)) {
1041 dev_kfree_skb_any(skb);
1042 return -EINVAL;
1043 }
1044 tmp++;
1045
1046 /* DataOffset, DataLength */
1047 if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
1048 dev_kfree_skb_any(skb);
1049 return -EOVERFLOW;
1050 }
1051 skb_trim(skb, get_unaligned_le32(tmp++));
1052
1053 skb_queue_tail(list, skb);
1054 return 0;
1055 }
1056
1057 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1058
1059 static int rndis_proc_show(struct seq_file *m, void *v)
1060 {
1061 rndis_params *param = m->private;
1062
1063 seq_printf(m,
1064 "Config Nr. %d\n"
1065 "used : %s\n"
1066 "state : %s\n"
1067 "medium : 0x%08X\n"
1068 "speed : %d\n"
1069 "cable : %s\n"
1070 "vendor ID : 0x%08X\n"
1071 "vendor : %s\n",
1072 param->confignr, (param->used) ? "y" : "n",
1073 ({ char *s = "?";
1074 switch (param->state) {
1075 case RNDIS_UNINITIALIZED:
1076 s = "RNDIS_UNINITIALIZED"; break;
1077 case RNDIS_INITIALIZED:
1078 s = "RNDIS_INITIALIZED"; break;
1079 case RNDIS_DATA_INITIALIZED:
1080 s = "RNDIS_DATA_INITIALIZED"; break;
1081 }; s; }),
1082 param->medium,
1083 (param->media_state) ? 0 : param->speed*100,
1084 (param->media_state) ? "disconnected" : "connected",
1085 param->vendorID, param->vendorDescr);
1086 return 0;
1087 }
1088
1089 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1090 size_t count, loff_t *ppos)
1091 {
1092 rndis_params *p = PDE(file->f_path.dentry->d_inode)->data;
1093 u32 speed = 0;
1094 int i, fl_speed = 0;
1095
1096 for (i = 0; i < count; i++) {
1097 char c;
1098 if (get_user(c, buffer))
1099 return -EFAULT;
1100 switch (c) {
1101 case '0':
1102 case '1':
1103 case '2':
1104 case '3':
1105 case '4':
1106 case '5':
1107 case '6':
1108 case '7':
1109 case '8':
1110 case '9':
1111 fl_speed = 1;
1112 speed = speed*10 + c - '0';
1113 break;
1114 case 'C':
1115 case 'c':
1116 rndis_signal_connect (p->confignr);
1117 break;
1118 case 'D':
1119 case 'd':
1120 rndis_signal_disconnect(p->confignr);
1121 break;
1122 default:
1123 if (fl_speed) p->speed = speed;
1124 else pr_debug("%c is not valid\n", c);
1125 break;
1126 }
1127
1128 buffer++;
1129 }
1130
1131 return count;
1132 }
1133
1134 static int rndis_proc_open(struct inode *inode, struct file *file)
1135 {
1136 return single_open(file, rndis_proc_show, PDE(inode)->data);
1137 }
1138
1139 static const struct file_operations rndis_proc_fops = {
1140 .owner = THIS_MODULE,
1141 .open = rndis_proc_open,
1142 .read = seq_read,
1143 .llseek = seq_lseek,
1144 .release = single_release,
1145 .write = rndis_proc_write,
1146 };
1147
1148 #define NAME_TEMPLATE "driver/rndis-%03d"
1149
1150 static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
1151
1152 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1153
1154
1155 int rndis_init(void)
1156 {
1157 u8 i;
1158
1159 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1160 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1161 char name [20];
1162
1163 sprintf (name, NAME_TEMPLATE, i);
1164 if (!(rndis_connect_state [i]
1165 = proc_create_data(name, 0660, NULL,
1166 &rndis_proc_fops,
1167 (void *)(rndis_per_dev_params + i))))
1168 {
1169 pr_debug("%s :remove entries", __func__);
1170 while (i) {
1171 sprintf (name, NAME_TEMPLATE, --i);
1172 remove_proc_entry (name, NULL);
1173 }
1174 pr_debug("\n");
1175 return -EIO;
1176 }
1177 #endif
1178 rndis_per_dev_params [i].confignr = i;
1179 rndis_per_dev_params [i].used = 0;
1180 rndis_per_dev_params [i].state = RNDIS_UNINITIALIZED;
1181 rndis_per_dev_params [i].media_state
1182 = NDIS_MEDIA_STATE_DISCONNECTED;
1183 INIT_LIST_HEAD (&(rndis_per_dev_params [i].resp_queue));
1184 }
1185
1186 return 0;
1187 }
1188
1189 void rndis_exit (void)
1190 {
1191 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1192 u8 i;
1193 char name [20];
1194
1195 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1196 sprintf (name, NAME_TEMPLATE, i);
1197 remove_proc_entry (name, NULL);
1198 }
1199 #endif
1200 }
1201
Linux with added FPC-III support