Commit | Line | Data |
---|---|---|
64e04910 DB |
1 | /* |
2 | * Host Side support for RNDIS Networking Links | |
3 | * Copyright (C) 2005 by David Brownell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
64e04910 | 19 | #include <linux/module.h> |
64e04910 DB |
20 | #include <linux/init.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/ethtool.h> | |
24 | #include <linux/workqueue.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
64e04910 DB |
26 | #include <linux/mii.h> |
27 | #include <linux/usb.h> | |
a8c28f23 | 28 | #include <linux/usb/cdc.h> |
3692e94f JK |
29 | #include <linux/usb/usbnet.h> |
30 | #include <linux/usb/rndis_host.h> | |
64e04910 DB |
31 | |
32 | ||
33 | /* | |
34 | * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of | |
35 | * course ACM was intended for modems, not Ethernet links! USB's standard | |
36 | * for Ethernet links is "CDC Ethernet", which is significantly simpler. | |
51400f1d DB |
37 | * |
38 | * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues | |
39 | * include: | |
40 | * - Power management in particular relies on information that's scattered | |
41 | * through other documentation, and which is incomplete or incorrect even | |
42 | * there. | |
43 | * - There are various undocumented protocol requirements, such as the | |
44 | * need to send unused garbage in control-OUT messages. | |
45 | * - In some cases, MS-Windows will emit undocumented requests; this | |
46 | * matters more to peripheral implementations than host ones. | |
47 | * | |
ad55d71a OAVR |
48 | * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync". |
49 | * | |
51400f1d DB |
50 | * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in |
51 | * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and | |
52 | * currently rare) "Ethernet Emulation Model" (EEM). | |
64e04910 DB |
53 | */ |
54 | ||
64e04910 DB |
55 | /* |
56 | * RNDIS notifications from device: command completion; "reverse" | |
57 | * keepalives; etc | |
58 | */ | |
5665998c | 59 | void rndis_status(struct usbnet *dev, struct urb *urb) |
64e04910 | 60 | { |
60b86755 JP |
61 | netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", |
62 | urb->actual_length, urb->status); | |
64e04910 DB |
63 | // FIXME for keepalives, respond immediately (asynchronously) |
64 | // if not an RNDIS status, do like cdc_status(dev,urb) does | |
65 | } | |
5665998c | 66 | EXPORT_SYMBOL_GPL(rndis_status); |
64e04910 | 67 | |
2a4901bc JK |
68 | /* |
69 | * RNDIS indicate messages. | |
70 | */ | |
71 | static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg, | |
72 | int buflen) | |
73 | { | |
74 | struct cdc_state *info = (void *)&dev->data; | |
75 | struct device *udev = &info->control->dev; | |
76 | ||
77 | if (dev->driver_info->indication) { | |
78 | dev->driver_info->indication(dev, msg, buflen); | |
79 | } else { | |
3eef3668 JK |
80 | u32 status = le32_to_cpu(msg->status); |
81 | ||
82 | switch (status) { | |
83 | case RNDIS_STATUS_MEDIA_CONNECT: | |
2a4901bc JK |
84 | dev_info(udev, "rndis media connect\n"); |
85 | break; | |
3eef3668 | 86 | case RNDIS_STATUS_MEDIA_DISCONNECT: |
2a4901bc JK |
87 | dev_info(udev, "rndis media disconnect\n"); |
88 | break; | |
89 | default: | |
3eef3668 | 90 | dev_info(udev, "rndis indication: 0x%08x\n", status); |
2a4901bc JK |
91 | } |
92 | } | |
93 | } | |
94 | ||
64e04910 DB |
95 | /* |
96 | * RPC done RNDIS-style. Caller guarantees: | |
97 | * - message is properly byteswapped | |
98 | * - there's no other request pending | |
99 | * - buf can hold up to 1KB response (required by RNDIS spec) | |
100 | * On return, the first few entries are already byteswapped. | |
101 | * | |
102 | * Call context is likely probe(), before interface name is known, | |
103 | * which is why we won't try to use it in the diagnostics. | |
104 | */ | |
818727ba | 105 | int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen) |
64e04910 DB |
106 | { |
107 | struct cdc_state *info = (void *) &dev->data; | |
4d42d417 | 108 | struct usb_cdc_notification notification; |
ad55d71a | 109 | int master_ifnum; |
64e04910 | 110 | int retval; |
4d42d417 | 111 | int partial; |
64e04910 | 112 | unsigned count; |
3eef3668 JK |
113 | u32 xid = 0, msg_len, request_id, msg_type, rsp, |
114 | status; | |
64e04910 DB |
115 | |
116 | /* REVISIT when this gets called from contexts other than probe() or | |
117 | * disconnect(): either serialize, or dispatch responses on xid | |
118 | */ | |
119 | ||
3eef3668 JK |
120 | msg_type = le32_to_cpu(buf->msg_type); |
121 | ||
ad55d71a | 122 | /* Issue the request; xid is unique, don't bother byteswapping it */ |
3eef3668 | 123 | if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) { |
64e04910 DB |
124 | xid = dev->xid++; |
125 | if (!xid) | |
126 | xid = dev->xid++; | |
127 | buf->request_id = (__force __le32) xid; | |
128 | } | |
ad55d71a | 129 | master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; |
64e04910 DB |
130 | retval = usb_control_msg(dev->udev, |
131 | usb_sndctrlpipe(dev->udev, 0), | |
132 | USB_CDC_SEND_ENCAPSULATED_COMMAND, | |
133 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
ad55d71a | 134 | 0, master_ifnum, |
64e04910 DB |
135 | buf, le32_to_cpu(buf->msg_len), |
136 | RNDIS_CONTROL_TIMEOUT_MS); | |
137 | if (unlikely(retval < 0 || xid == 0)) | |
138 | return retval; | |
139 | ||
4d42d417 BH |
140 | /* Some devices don't respond on the control channel until |
141 | * polled on the status channel, so do that first. */ | |
142 | if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) { | |
143 | retval = usb_interrupt_msg( | |
144 | dev->udev, | |
145 | usb_rcvintpipe(dev->udev, | |
146 | dev->status->desc.bEndpointAddress), | |
147 | ¬ification, sizeof(notification), &partial, | |
148 | RNDIS_CONTROL_TIMEOUT_MS); | |
149 | if (unlikely(retval < 0)) | |
150 | return retval; | |
151 | } | |
64e04910 | 152 | |
4d42d417 | 153 | /* Poll the control channel; the request probably completed immediately */ |
3eef3668 | 154 | rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION; |
64e04910 | 155 | for (count = 0; count < 10; count++) { |
ad55d71a | 156 | memset(buf, 0, CONTROL_BUFFER_SIZE); |
64e04910 DB |
157 | retval = usb_control_msg(dev->udev, |
158 | usb_rcvctrlpipe(dev->udev, 0), | |
159 | USB_CDC_GET_ENCAPSULATED_RESPONSE, | |
160 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
ad55d71a | 161 | 0, master_ifnum, |
818727ba | 162 | buf, buflen, |
64e04910 DB |
163 | RNDIS_CONTROL_TIMEOUT_MS); |
164 | if (likely(retval >= 8)) { | |
3eef3668 | 165 | msg_type = le32_to_cpu(buf->msg_type); |
64e04910 | 166 | msg_len = le32_to_cpu(buf->msg_len); |
3eef3668 | 167 | status = le32_to_cpu(buf->status); |
64e04910 | 168 | request_id = (__force u32) buf->request_id; |
3eef3668 | 169 | if (likely(msg_type == rsp)) { |
64e04910 | 170 | if (likely(request_id == xid)) { |
3eef3668 | 171 | if (unlikely(rsp == RNDIS_MSG_RESET_C)) |
64e04910 | 172 | return 0; |
3eef3668 JK |
173 | if (likely(RNDIS_STATUS_SUCCESS == |
174 | status)) | |
64e04910 DB |
175 | return 0; |
176 | dev_dbg(&info->control->dev, | |
177 | "rndis reply status %08x\n", | |
3eef3668 | 178 | status); |
64e04910 DB |
179 | return -EL3RST; |
180 | } | |
181 | dev_dbg(&info->control->dev, | |
182 | "rndis reply id %d expected %d\n", | |
183 | request_id, xid); | |
184 | /* then likely retry */ | |
3eef3668 JK |
185 | } else switch (msg_type) { |
186 | case RNDIS_MSG_INDICATE: /* fault/event */ | |
2a4901bc | 187 | rndis_msg_indicate(dev, (void *)buf, buflen); |
64e04910 | 188 | break; |
3eef3668 | 189 | case RNDIS_MSG_KEEPALIVE: { /* ping */ |
64e04910 DB |
190 | struct rndis_keepalive_c *msg = (void *)buf; |
191 | ||
7390e8b0 | 192 | msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C); |
35c26c2c | 193 | msg->msg_len = cpu_to_le32(sizeof *msg); |
7390e8b0 | 194 | msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS); |
64e04910 DB |
195 | retval = usb_control_msg(dev->udev, |
196 | usb_sndctrlpipe(dev->udev, 0), | |
197 | USB_CDC_SEND_ENCAPSULATED_COMMAND, | |
198 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
ad55d71a | 199 | 0, master_ifnum, |
64e04910 DB |
200 | msg, sizeof *msg, |
201 | RNDIS_CONTROL_TIMEOUT_MS); | |
202 | if (unlikely(retval < 0)) | |
203 | dev_dbg(&info->control->dev, | |
204 | "rndis keepalive err %d\n", | |
205 | retval); | |
206 | } | |
207 | break; | |
208 | default: | |
209 | dev_dbg(&info->control->dev, | |
210 | "unexpected rndis msg %08x len %d\n", | |
211 | le32_to_cpu(buf->msg_type), msg_len); | |
212 | } | |
213 | } else { | |
214 | /* device probably issued a protocol stall; ignore */ | |
215 | dev_dbg(&info->control->dev, | |
216 | "rndis response error, code %d\n", retval); | |
217 | } | |
74ef5c50 | 218 | msleep(20); |
64e04910 DB |
219 | } |
220 | dev_dbg(&info->control->dev, "rndis response timeout\n"); | |
221 | return -ETIMEDOUT; | |
222 | } | |
5665998c | 223 | EXPORT_SYMBOL_GPL(rndis_command); |
64e04910 | 224 | |
ddda0862 DB |
225 | /* |
226 | * rndis_query: | |
227 | * | |
228 | * Performs a query for @oid along with 0 or more bytes of payload as | |
229 | * specified by @in_len. If @reply_len is not set to -1 then the reply | |
230 | * length is checked against this value, resulting in an error if it | |
231 | * doesn't match. | |
232 | * | |
233 | * NOTE: Adding a payload exactly or greater than the size of the expected | |
234 | * response payload is an evident requirement MSFT added for ActiveSync. | |
235 | * | |
236 | * The only exception is for OIDs that return a variably sized response, | |
237 | * in which case no payload should be added. This undocumented (and | |
238 | * nonsensical!) issue was found by sniffing protocol requests from the | |
239 | * ActiveSync 4.1 Windows driver. | |
240 | */ | |
241 | static int rndis_query(struct usbnet *dev, struct usb_interface *intf, | |
5432bdc0 | 242 | void *buf, u32 oid, u32 in_len, |
ddda0862 DB |
243 | void **reply, int *reply_len) |
244 | { | |
245 | int retval; | |
246 | union { | |
247 | void *buf; | |
248 | struct rndis_msg_hdr *header; | |
249 | struct rndis_query *get; | |
250 | struct rndis_query_c *get_c; | |
251 | } u; | |
252 | u32 off, len; | |
253 | ||
254 | u.buf = buf; | |
255 | ||
256 | memset(u.get, 0, sizeof *u.get + in_len); | |
7390e8b0 | 257 | u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY); |
ddda0862 | 258 | u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); |
5432bdc0 | 259 | u.get->oid = cpu_to_le32(oid); |
ddda0862 | 260 | u.get->len = cpu_to_le32(in_len); |
35c26c2c | 261 | u.get->offset = cpu_to_le32(20); |
ddda0862 | 262 | |
818727ba | 263 | retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); |
ddda0862 DB |
264 | if (unlikely(retval < 0)) { |
265 | dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", | |
266 | oid, retval); | |
267 | return retval; | |
268 | } | |
269 | ||
270 | off = le32_to_cpu(u.get_c->offset); | |
271 | len = le32_to_cpu(u.get_c->len); | |
272 | if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE)) | |
273 | goto response_error; | |
274 | ||
275 | if (*reply_len != -1 && len != *reply_len) | |
276 | goto response_error; | |
277 | ||
278 | *reply = (unsigned char *) &u.get_c->request_id + off; | |
279 | *reply_len = len; | |
280 | ||
281 | return retval; | |
282 | ||
283 | response_error: | |
284 | dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " | |
285 | "invalid response - off %d len %d\n", | |
286 | oid, off, len); | |
287 | return -EDOM; | |
288 | } | |
289 | ||
0f2166df SH |
290 | /* same as usbnet_netdev_ops but MTU change not allowed */ |
291 | static const struct net_device_ops rndis_netdev_ops = { | |
292 | .ndo_open = usbnet_open, | |
293 | .ndo_stop = usbnet_stop, | |
294 | .ndo_start_xmit = usbnet_start_xmit, | |
295 | .ndo_tx_timeout = usbnet_tx_timeout, | |
296 | .ndo_set_mac_address = eth_mac_addr, | |
297 | .ndo_validate_addr = eth_validate_addr, | |
298 | }; | |
299 | ||
039ee17d JK |
300 | int |
301 | generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) | |
64e04910 DB |
302 | { |
303 | int retval; | |
304 | struct net_device *net = dev->net; | |
deb31f17 | 305 | struct cdc_state *info = (void *) &dev->data; |
64e04910 DB |
306 | union { |
307 | void *buf; | |
308 | struct rndis_msg_hdr *header; | |
309 | struct rndis_init *init; | |
310 | struct rndis_init_c *init_c; | |
311 | struct rndis_query *get; | |
312 | struct rndis_query_c *get_c; | |
313 | struct rndis_set *set; | |
314 | struct rndis_set_c *set_c; | |
9ff55874 | 315 | struct rndis_halt *halt; |
64e04910 | 316 | } u; |
d63ddcec AV |
317 | u32 tmp; |
318 | __le32 phym_unspec, *phym; | |
ddda0862 DB |
319 | int reply_len; |
320 | unsigned char *bp; | |
64e04910 DB |
321 | |
322 | /* we can't rely on i/o from stack working, or stack allocation */ | |
ad55d71a | 323 | u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); |
64e04910 DB |
324 | if (!u.buf) |
325 | return -ENOMEM; | |
326 | retval = usbnet_generic_cdc_bind(dev, intf); | |
327 | if (retval < 0) | |
deb31f17 | 328 | goto fail; |
64e04910 | 329 | |
7390e8b0 | 330 | u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT); |
35c26c2c HH |
331 | u.init->msg_len = cpu_to_le32(sizeof *u.init); |
332 | u.init->major_version = cpu_to_le32(1); | |
333 | u.init->minor_version = cpu_to_le32(0); | |
64e04910 | 334 | |
ad55d71a OAVR |
335 | /* max transfer (in spec) is 0x4000 at full speed, but for |
336 | * TX we'll stick to one Ethernet packet plus RNDIS framing. | |
337 | * For RX we handle drivers that zero-pad to end-of-packet. | |
338 | * Don't let userspace change these settings. | |
ddda0862 DB |
339 | * |
340 | * NOTE: there still seems to be wierdness here, as if we need | |
341 | * to do some more things to make sure WinCE targets accept this. | |
342 | * They default to jumbograms of 8KB or 16KB, which is absurd | |
343 | * for such low data rates and which is also more than Linux | |
344 | * can usually expect to allocate for SKB data... | |
ad55d71a OAVR |
345 | */ |
346 | net->hard_header_len += sizeof (struct rndis_data_hdr); | |
347 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
348 | ||
10d0f27c JCD |
349 | dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1); |
350 | if (dev->maxpacket == 0) { | |
a475f603 JP |
351 | netif_dbg(dev, probe, dev->net, |
352 | "dev->maxpacket can't be 0\n"); | |
10d0f27c JCD |
353 | retval = -EINVAL; |
354 | goto fail_and_release; | |
355 | } | |
356 | ||
ad55d71a OAVR |
357 | dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); |
358 | dev->rx_urb_size &= ~(dev->maxpacket - 1); | |
359 | u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); | |
360 | ||
0f2166df SH |
361 | net->netdev_ops = &rndis_netdev_ops; |
362 | ||
818727ba | 363 | retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); |
64e04910 DB |
364 | if (unlikely(retval < 0)) { |
365 | /* it might not even be an RNDIS device!! */ | |
366 | dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); | |
ddda0862 | 367 | goto fail_and_release; |
ad55d71a OAVR |
368 | } |
369 | tmp = le32_to_cpu(u.init_c->max_transfer_size); | |
370 | if (tmp < dev->hard_mtu) { | |
500d2c2f TS |
371 | if (tmp <= net->hard_header_len) { |
372 | dev_err(&intf->dev, | |
373 | "dev can't take %u byte packets (max %u)\n", | |
374 | dev->hard_mtu, tmp); | |
375 | retval = -EINVAL; | |
9ff55874 | 376 | goto halt_fail_and_release; |
500d2c2f | 377 | } |
500d2c2f TS |
378 | dev_warn(&intf->dev, |
379 | "dev can't take %u byte packets (max %u), " | |
380 | "adjusting MTU to %u\n", | |
40ac7b62 GN |
381 | dev->hard_mtu, tmp, tmp - net->hard_header_len); |
382 | dev->hard_mtu = tmp; | |
383 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
64e04910 | 384 | } |
ad55d71a | 385 | |
64e04910 | 386 | /* REVISIT: peripheral "alignment" request is ignored ... */ |
ad55d71a OAVR |
387 | dev_dbg(&intf->dev, |
388 | "hard mtu %u (%u from dev), rx buflen %Zu, align %d\n", | |
389 | dev->hard_mtu, tmp, dev->rx_urb_size, | |
64e04910 DB |
390 | 1 << le32_to_cpu(u.init_c->packet_alignment)); |
391 | ||
7c39e038 JK |
392 | /* module has some device initialization code needs to be done right |
393 | * after RNDIS_INIT */ | |
394 | if (dev->driver_info->early_init && | |
395 | dev->driver_info->early_init(dev) != 0) | |
396 | goto halt_fail_and_release; | |
397 | ||
039ee17d | 398 | /* Check physical medium */ |
9f5e60dd | 399 | phym = NULL; |
039ee17d | 400 | reply_len = sizeof *phym; |
7390e8b0 | 401 | retval = rndis_query(dev, intf, u.buf, |
5432bdc0 JK |
402 | RNDIS_OID_GEN_PHYSICAL_MEDIUM, |
403 | 0, (void **) &phym, &reply_len); | |
9f5e60dd | 404 | if (retval != 0 || !phym) { |
039ee17d | 405 | /* OID is optional so don't fail here. */ |
7390e8b0 | 406 | phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED); |
9f5e60dd JK |
407 | phym = &phym_unspec; |
408 | } | |
039ee17d | 409 | if ((flags & FLAG_RNDIS_PHYM_WIRELESS) && |
3eef3668 | 410 | le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { |
a475f603 JP |
411 | netif_dbg(dev, probe, dev->net, |
412 | "driver requires wireless physical medium, but device is not\n"); | |
039ee17d JK |
413 | retval = -ENODEV; |
414 | goto halt_fail_and_release; | |
415 | } | |
416 | if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) && | |
3eef3668 | 417 | le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { |
a475f603 JP |
418 | netif_dbg(dev, probe, dev->net, |
419 | "driver requires non-wireless physical medium, but device is wireless.\n"); | |
039ee17d JK |
420 | retval = -ENODEV; |
421 | goto halt_fail_and_release; | |
422 | } | |
423 | ||
ddda0862 DB |
424 | /* Get designated host ethernet address */ |
425 | reply_len = ETH_ALEN; | |
7390e8b0 | 426 | retval = rndis_query(dev, intf, u.buf, |
5432bdc0 JK |
427 | RNDIS_OID_802_3_PERMANENT_ADDRESS, |
428 | 48, (void **) &bp, &reply_len); | |
ddda0862 | 429 | if (unlikely(retval< 0)) { |
64e04910 | 430 | dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); |
9ff55874 | 431 | goto halt_fail_and_release; |
64e04910 | 432 | } |
ddda0862 | 433 | memcpy(net->dev_addr, bp, ETH_ALEN); |
64e04910 DB |
434 | |
435 | /* set a nonzero filter to enable data transfers */ | |
436 | memset(u.set, 0, sizeof *u.set); | |
7390e8b0 | 437 | u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET); |
35c26c2c | 438 | u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); |
8cdddc3f | 439 | u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER); |
35c26c2c HH |
440 | u.set->len = cpu_to_le32(4); |
441 | u.set->offset = cpu_to_le32((sizeof *u.set) - 8); | |
7390e8b0 | 442 | *(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER); |
64e04910 | 443 | |
818727ba | 444 | retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); |
64e04910 DB |
445 | if (unlikely(retval < 0)) { |
446 | dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); | |
9ff55874 | 447 | goto halt_fail_and_release; |
64e04910 DB |
448 | } |
449 | ||
450 | retval = 0; | |
deb31f17 DG |
451 | |
452 | kfree(u.buf); | |
453 | return retval; | |
454 | ||
9ff55874 JK |
455 | halt_fail_and_release: |
456 | memset(u.halt, 0, sizeof *u.halt); | |
7390e8b0 | 457 | u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); |
35c26c2c | 458 | u.halt->msg_len = cpu_to_le32(sizeof *u.halt); |
818727ba | 459 | (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE); |
deb31f17 DG |
460 | fail_and_release: |
461 | usb_set_intfdata(info->data, NULL); | |
462 | usb_driver_release_interface(driver_of(intf), info->data); | |
ddda0862 | 463 | info->data = NULL; |
deb31f17 | 464 | fail: |
64e04910 DB |
465 | kfree(u.buf); |
466 | return retval; | |
467 | } | |
5665998c | 468 | EXPORT_SYMBOL_GPL(generic_rndis_bind); |
64e04910 | 469 | |
039ee17d JK |
470 | static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) |
471 | { | |
472 | return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); | |
473 | } | |
474 | ||
5665998c | 475 | void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) |
64e04910 DB |
476 | { |
477 | struct rndis_halt *halt; | |
478 | ||
479 | /* try to clear any rndis state/activity (no i/o from stack!) */ | |
04c3c01a | 480 | halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); |
64e04910 | 481 | if (halt) { |
7390e8b0 | 482 | halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); |
35c26c2c | 483 | halt->msg_len = cpu_to_le32(sizeof *halt); |
818727ba | 484 | (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE); |
64e04910 DB |
485 | kfree(halt); |
486 | } | |
487 | ||
2bfa2e1f | 488 | usbnet_cdc_unbind(dev, intf); |
64e04910 | 489 | } |
5665998c | 490 | EXPORT_SYMBOL_GPL(rndis_unbind); |
64e04910 DB |
491 | |
492 | /* | |
493 | * DATA -- host must not write zlps | |
494 | */ | |
5665998c | 495 | int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb) |
64e04910 DB |
496 | { |
497 | /* peripheral may have batched packets to us... */ | |
498 | while (likely(skb->len)) { | |
499 | struct rndis_data_hdr *hdr = (void *)skb->data; | |
500 | struct sk_buff *skb2; | |
3eef3668 | 501 | u32 msg_type, msg_len, data_offset, data_len; |
64e04910 | 502 | |
3eef3668 | 503 | msg_type = le32_to_cpu(hdr->msg_type); |
64e04910 DB |
504 | msg_len = le32_to_cpu(hdr->msg_len); |
505 | data_offset = le32_to_cpu(hdr->data_offset); | |
506 | data_len = le32_to_cpu(hdr->data_len); | |
507 | ||
508 | /* don't choke if we see oob, per-packet data, etc */ | |
3eef3668 JK |
509 | if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len |
510 | || (data_offset + data_len + 8) > msg_len)) { | |
58e2e7d5 | 511 | dev->net->stats.rx_frame_errors++; |
60b86755 JP |
512 | netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", |
513 | le32_to_cpu(hdr->msg_type), | |
514 | msg_len, data_offset, data_len, skb->len); | |
64e04910 DB |
515 | return 0; |
516 | } | |
517 | skb_pull(skb, 8 + data_offset); | |
518 | ||
519 | /* at most one packet left? */ | |
520 | if (likely((data_len - skb->len) <= sizeof *hdr)) { | |
521 | skb_trim(skb, data_len); | |
522 | break; | |
523 | } | |
524 | ||
525 | /* try to return all the packets in the batch */ | |
526 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
527 | if (unlikely(!skb2)) | |
528 | break; | |
529 | skb_pull(skb, msg_len - sizeof *hdr); | |
530 | skb_trim(skb2, data_len); | |
531 | usbnet_skb_return(dev, skb2); | |
532 | } | |
533 | ||
534 | /* caller will usbnet_skb_return the remaining packet */ | |
535 | return 1; | |
536 | } | |
5665998c | 537 | EXPORT_SYMBOL_GPL(rndis_rx_fixup); |
64e04910 | 538 | |
5665998c | 539 | struct sk_buff * |
55016f10 | 540 | rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
64e04910 DB |
541 | { |
542 | struct rndis_data_hdr *hdr; | |
543 | struct sk_buff *skb2; | |
544 | unsigned len = skb->len; | |
545 | ||
546 | if (likely(!skb_cloned(skb))) { | |
547 | int room = skb_headroom(skb); | |
548 | ||
549 | /* enough head room as-is? */ | |
550 | if (unlikely((sizeof *hdr) <= room)) | |
551 | goto fill; | |
552 | ||
553 | /* enough room, but needs to be readjusted? */ | |
554 | room += skb_tailroom(skb); | |
555 | if (likely((sizeof *hdr) <= room)) { | |
556 | skb->data = memmove(skb->head + sizeof *hdr, | |
557 | skb->data, len); | |
27a884dc | 558 | skb_set_tail_pointer(skb, len); |
64e04910 DB |
559 | goto fill; |
560 | } | |
561 | } | |
562 | ||
563 | /* create a new skb, with the correct size (and tailpad) */ | |
564 | skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags); | |
565 | dev_kfree_skb_any(skb); | |
566 | if (unlikely(!skb2)) | |
567 | return skb2; | |
568 | skb = skb2; | |
569 | ||
570 | /* fill out the RNDIS header. we won't bother trying to batch | |
571 | * packets; Linux minimizes wasted bandwidth through tx queues. | |
572 | */ | |
573 | fill: | |
574 | hdr = (void *) __skb_push(skb, sizeof *hdr); | |
575 | memset(hdr, 0, sizeof *hdr); | |
7390e8b0 | 576 | hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET); |
64e04910 | 577 | hdr->msg_len = cpu_to_le32(skb->len); |
35c26c2c | 578 | hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); |
64e04910 DB |
579 | hdr->data_len = cpu_to_le32(len); |
580 | ||
581 | /* FIXME make the last packet always be short ... */ | |
582 | return skb; | |
583 | } | |
5665998c | 584 | EXPORT_SYMBOL_GPL(rndis_tx_fixup); |
64e04910 DB |
585 | |
586 | ||
587 | static const struct driver_info rndis_info = { | |
588 | .description = "RNDIS device", | |
c261344d | 589 | .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, |
039ee17d | 590 | .bind = rndis_bind, |
64e04910 DB |
591 | .unbind = rndis_unbind, |
592 | .status = rndis_status, | |
593 | .rx_fixup = rndis_rx_fixup, | |
594 | .tx_fixup = rndis_tx_fixup, | |
595 | }; | |
596 | ||
4d42d417 BH |
597 | static const struct driver_info rndis_poll_status_info = { |
598 | .description = "RNDIS device (poll status before control)", | |
eb8aa72d | 599 | .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, |
4d42d417 BH |
600 | .data = RNDIS_DRIVER_DATA_POLL_STATUS, |
601 | .bind = rndis_bind, | |
602 | .unbind = rndis_unbind, | |
603 | .status = rndis_status, | |
604 | .rx_fixup = rndis_rx_fixup, | |
605 | .tx_fixup = rndis_tx_fixup, | |
606 | }; | |
607 | ||
64e04910 DB |
608 | /*-------------------------------------------------------------------------*/ |
609 | ||
610 | static const struct usb_device_id products [] = { | |
611 | { | |
4d42d417 BH |
612 | /* 2Wire HomePortal 1000SW */ |
613 | USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042, | |
614 | USB_CLASS_COMM, 2 /* ACM */, 0x0ff), | |
615 | .driver_info = (unsigned long) &rndis_poll_status_info, | |
616 | }, { | |
64e04910 DB |
617 | /* RNDIS is MSFT's un-official variant of CDC ACM */ |
618 | USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff), | |
619 | .driver_info = (unsigned long) &rndis_info, | |
ad55d71a OAVR |
620 | }, { |
621 | /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */ | |
622 | USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1), | |
4d42d417 | 623 | .driver_info = (unsigned long) &rndis_poll_status_info, |
7e99eedd TB |
624 | }, { |
625 | /* RNDIS for tethering */ | |
626 | USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), | |
627 | .driver_info = (unsigned long) &rndis_info, | |
64e04910 DB |
628 | }, |
629 | { }, // END | |
630 | }; | |
631 | MODULE_DEVICE_TABLE(usb, products); | |
632 | ||
633 | static struct usb_driver rndis_driver = { | |
64e04910 DB |
634 | .name = "rndis_host", |
635 | .id_table = products, | |
636 | .probe = usbnet_probe, | |
637 | .disconnect = usbnet_disconnect, | |
638 | .suspend = usbnet_suspend, | |
639 | .resume = usbnet_resume, | |
e1f12eb6 | 640 | .disable_hub_initiated_lpm = 1, |
64e04910 DB |
641 | }; |
642 | ||
d632eb1b | 643 | module_usb_driver(rndis_driver); |
64e04910 DB |
644 | |
645 | MODULE_AUTHOR("David Brownell"); | |
646 | MODULE_DESCRIPTION("USB Host side RNDIS driver"); | |
647 | MODULE_LICENSE("GPL"); |