Commit | Line | Data |
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1da177e4 | 1 | /* |
090ffa9d | 2 | * USB Network driver infrastructure |
f29fc259 | 3 | * Copyright (C) 2000-2005 by David Brownell |
1da177e4 | 4 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* | |
22 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
23 | * kinds of full and high speed networking devices: host-to-host cables, |
24 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 25 | * |
090ffa9d DB |
26 | * These devices usually differ in terms of control protocols (if they |
27 | * even have one!) and sometimes they define new framing to wrap or batch | |
28 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
29 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
30 | * issues can usefully be addressed by this framework. | |
31 | */ | |
1da177e4 LT |
32 | |
33 | // #define DEBUG // error path messages, extra info | |
34 | // #define VERBOSE // more; success messages | |
35 | ||
36 | #include <linux/config.h> | |
37 | #ifdef CONFIG_USB_DEBUG | |
38 | # define DEBUG | |
39 | #endif | |
40 | #include <linux/module.h> | |
1da177e4 LT |
41 | #include <linux/sched.h> |
42 | #include <linux/init.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/etherdevice.h> | |
1da177e4 LT |
45 | #include <linux/ethtool.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/mii.h> | |
1da177e4 | 48 | #include <linux/usb.h> |
f29fc259 DB |
49 | |
50 | #include "usbnet.h" | |
51 | ||
52 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
53 | |
54 | ||
55 | /*-------------------------------------------------------------------------*/ | |
56 | ||
57 | /* | |
58 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
59 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
60 | * One maximum size Ethernet packet takes twenty four of them. | |
61 | * For high speed, each frame comfortably fits almost 36 max size | |
62 | * Ethernet packets (so queues should be bigger). | |
f29fc259 DB |
63 | * |
64 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to | |
65 | * let the USB host controller be busy for 5msec or more before an irq | |
66 | * is required, under load. Jumbograms change the equation. | |
1da177e4 LT |
67 | */ |
68 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4) | |
69 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4) | |
70 | ||
1da177e4 LT |
71 | // reawaken network queue this soon after stopping; else watchdog barks |
72 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
73 | ||
74 | // throttle rx/tx briefly after some faults, so khubd might disconnect() | |
75 | // us (it polls at HZ/4 usually) before we report too many false errors. | |
76 | #define THROTTLE_JIFFIES (HZ/8) | |
77 | ||
1da177e4 LT |
78 | // between wakeups |
79 | #define UNLINK_TIMEOUT_MS 3 | |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
83 | // randomly generated ethernet address | |
84 | static u8 node_id [ETH_ALEN]; | |
85 | ||
1da177e4 LT |
86 | static const char driver_name [] = "usbnet"; |
87 | ||
88 | /* use ethtool to change the level for any given device */ | |
89 | static int msg_level = -1; | |
90 | module_param (msg_level, int, 0); | |
91 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
92 | ||
1da177e4 LT |
93 | /*-------------------------------------------------------------------------*/ |
94 | ||
1da177e4 | 95 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 96 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
97 | { |
98 | int tmp; | |
99 | struct usb_host_interface *alt = NULL; | |
100 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
101 | struct usb_host_endpoint *status = NULL; | |
102 | ||
103 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
104 | unsigned ep; | |
105 | ||
106 | in = out = status = NULL; | |
107 | alt = intf->altsetting + tmp; | |
108 | ||
109 | /* take the first altsetting with in-bulk + out-bulk; | |
110 | * remember any status endpoint, just in case; | |
111 | * ignore other endpoints and altsetttings. | |
112 | */ | |
113 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
114 | struct usb_host_endpoint *e; | |
115 | int intr = 0; | |
116 | ||
117 | e = alt->endpoint + ep; | |
118 | switch (e->desc.bmAttributes) { | |
119 | case USB_ENDPOINT_XFER_INT: | |
120 | if (!(e->desc.bEndpointAddress & USB_DIR_IN)) | |
121 | continue; | |
122 | intr = 1; | |
123 | /* FALLTHROUGH */ | |
124 | case USB_ENDPOINT_XFER_BULK: | |
125 | break; | |
126 | default: | |
127 | continue; | |
128 | } | |
129 | if (e->desc.bEndpointAddress & USB_DIR_IN) { | |
130 | if (!intr && !in) | |
131 | in = e; | |
132 | else if (intr && !status) | |
133 | status = e; | |
134 | } else { | |
135 | if (!out) | |
136 | out = e; | |
137 | } | |
138 | } | |
139 | if (in && out) | |
140 | break; | |
141 | } | |
142 | if (!alt || !in || !out) | |
143 | return -EINVAL; | |
144 | ||
145 | if (alt->desc.bAlternateSetting != 0 | |
146 | || !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
147 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, | |
148 | alt->desc.bAlternateSetting); | |
149 | if (tmp < 0) | |
150 | return tmp; | |
151 | } | |
152 | ||
153 | dev->in = usb_rcvbulkpipe (dev->udev, | |
154 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
155 | dev->out = usb_sndbulkpipe (dev->udev, | |
156 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
157 | dev->status = status; | |
158 | return 0; | |
159 | } | |
2e55cc72 | 160 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 LT |
161 | |
162 | static void intr_complete (struct urb *urb, struct pt_regs *regs); | |
163 | ||
164 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
165 | { | |
166 | char *buf = NULL; | |
167 | unsigned pipe = 0; | |
168 | unsigned maxp; | |
169 | unsigned period; | |
170 | ||
171 | if (!dev->driver_info->status) | |
172 | return 0; | |
173 | ||
174 | pipe = usb_rcvintpipe (dev->udev, | |
175 | dev->status->desc.bEndpointAddress | |
176 | & USB_ENDPOINT_NUMBER_MASK); | |
177 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
178 | ||
179 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
180 | period = max ((int) dev->status->desc.bInterval, | |
181 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
182 | ||
183 | buf = kmalloc (maxp, SLAB_KERNEL); | |
184 | if (buf) { | |
185 | dev->interrupt = usb_alloc_urb (0, SLAB_KERNEL); | |
186 | if (!dev->interrupt) { | |
187 | kfree (buf); | |
188 | return -ENOMEM; | |
189 | } else { | |
190 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
191 | buf, maxp, intr_complete, dev, period); | |
192 | dev_dbg(&intf->dev, | |
193 | "status ep%din, %d bytes period %d\n", | |
194 | usb_pipeendpoint(pipe), maxp, period); | |
195 | } | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
2e55cc72 DB |
200 | /* Passes this packet up the stack, updating its accounting. |
201 | * Some link protocols batch packets, so their rx_fixup paths | |
202 | * can return clones as well as just modify the original skb. | |
203 | */ | |
204 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
205 | { |
206 | int status; | |
207 | ||
208 | skb->dev = dev->net; | |
209 | skb->protocol = eth_type_trans (skb, dev->net); | |
210 | dev->stats.rx_packets++; | |
211 | dev->stats.rx_bytes += skb->len; | |
212 | ||
213 | if (netif_msg_rx_status (dev)) | |
5330e927 | 214 | devdbg (dev, "< rx, len %zu, type 0x%x", |
1da177e4 LT |
215 | skb->len + sizeof (struct ethhdr), skb->protocol); |
216 | memset (skb->cb, 0, sizeof (struct skb_data)); | |
217 | status = netif_rx (skb); | |
218 | if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev)) | |
219 | devdbg (dev, "netif_rx status %d", status); | |
220 | } | |
2e55cc72 | 221 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 222 | |
1da177e4 LT |
223 | \f |
224 | /*------------------------------------------------------------------------- | |
225 | * | |
226 | * Network Device Driver (peer link to "Host Device", from USB host) | |
227 | * | |
228 | *-------------------------------------------------------------------------*/ | |
229 | ||
230 | static int usbnet_change_mtu (struct net_device *net, int new_mtu) | |
231 | { | |
232 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 233 | int ll_mtu = new_mtu + net->hard_header_len; |
1da177e4 | 234 | |
f29fc259 | 235 | if (new_mtu <= 0 || ll_mtu > dev->hard_mtu) |
1da177e4 | 236 | return -EINVAL; |
1da177e4 | 237 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 238 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
239 | return -EDOM; |
240 | net->mtu = new_mtu; | |
241 | return 0; | |
242 | } | |
243 | ||
244 | /*-------------------------------------------------------------------------*/ | |
245 | ||
246 | static struct net_device_stats *usbnet_get_stats (struct net_device *net) | |
247 | { | |
248 | struct usbnet *dev = netdev_priv(net); | |
249 | return &dev->stats; | |
250 | } | |
251 | ||
252 | /*-------------------------------------------------------------------------*/ | |
253 | ||
254 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from | |
255 | * completion callbacks. 2.5 should have fixed those bugs... | |
256 | */ | |
257 | ||
8728b834 | 258 | static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list) |
1da177e4 | 259 | { |
1da177e4 LT |
260 | unsigned long flags; |
261 | ||
8728b834 DM |
262 | spin_lock_irqsave(&list->lock, flags); |
263 | __skb_unlink(skb, list); | |
264 | spin_unlock(&list->lock); | |
265 | spin_lock(&dev->done.lock); | |
266 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 267 | if (dev->done.qlen == 1) |
8728b834 DM |
268 | tasklet_schedule(&dev->bh); |
269 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
1da177e4 LT |
270 | } |
271 | ||
272 | /* some work can't be done in tasklets, so we use keventd | |
273 | * | |
274 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
275 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
276 | */ | |
2e55cc72 | 277 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
278 | { |
279 | set_bit (work, &dev->flags); | |
280 | if (!schedule_work (&dev->kevent)) | |
281 | deverr (dev, "kevent %d may have been dropped", work); | |
282 | else | |
283 | devdbg (dev, "kevent %d scheduled", work); | |
284 | } | |
2e55cc72 | 285 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
286 | |
287 | /*-------------------------------------------------------------------------*/ | |
288 | ||
289 | static void rx_complete (struct urb *urb, struct pt_regs *regs); | |
290 | ||
55016f10 | 291 | static void rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
292 | { |
293 | struct sk_buff *skb; | |
294 | struct skb_data *entry; | |
295 | int retval = 0; | |
296 | unsigned long lockflags; | |
2e55cc72 | 297 | size_t size = dev->rx_urb_size; |
1da177e4 | 298 | |
1da177e4 LT |
299 | if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) { |
300 | if (netif_msg_rx_err (dev)) | |
301 | devdbg (dev, "no rx skb"); | |
2e55cc72 | 302 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
303 | usb_free_urb (urb); |
304 | return; | |
305 | } | |
306 | skb_reserve (skb, NET_IP_ALIGN); | |
307 | ||
308 | entry = (struct skb_data *) skb->cb; | |
309 | entry->urb = urb; | |
310 | entry->dev = dev; | |
311 | entry->state = rx_start; | |
312 | entry->length = 0; | |
313 | ||
314 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
315 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
316 | |
317 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
318 | ||
319 | if (netif_running (dev->net) | |
320 | && netif_device_present (dev->net) | |
321 | && !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
322 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)){ | |
323 | case -EPIPE: | |
2e55cc72 | 324 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
325 | break; |
326 | case -ENOMEM: | |
2e55cc72 | 327 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
328 | break; |
329 | case -ENODEV: | |
330 | if (netif_msg_ifdown (dev)) | |
331 | devdbg (dev, "device gone"); | |
332 | netif_device_detach (dev->net); | |
333 | break; | |
334 | default: | |
335 | if (netif_msg_rx_err (dev)) | |
336 | devdbg (dev, "rx submit, %d", retval); | |
337 | tasklet_schedule (&dev->bh); | |
338 | break; | |
339 | case 0: | |
340 | __skb_queue_tail (&dev->rxq, skb); | |
341 | } | |
342 | } else { | |
343 | if (netif_msg_ifdown (dev)) | |
344 | devdbg (dev, "rx: stopped"); | |
345 | retval = -ENOLINK; | |
346 | } | |
347 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
348 | if (retval) { | |
349 | dev_kfree_skb_any (skb); | |
350 | usb_free_urb (urb); | |
351 | } | |
352 | } | |
353 | ||
354 | ||
355 | /*-------------------------------------------------------------------------*/ | |
356 | ||
357 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
358 | { | |
359 | if (dev->driver_info->rx_fixup | |
360 | && !dev->driver_info->rx_fixup (dev, skb)) | |
361 | goto error; | |
362 | // else network stack removes extra byte if we forced a short packet | |
363 | ||
364 | if (skb->len) | |
2e55cc72 | 365 | usbnet_skb_return (dev, skb); |
1da177e4 LT |
366 | else { |
367 | if (netif_msg_rx_err (dev)) | |
368 | devdbg (dev, "drop"); | |
369 | error: | |
370 | dev->stats.rx_errors++; | |
371 | skb_queue_tail (&dev->done, skb); | |
372 | } | |
373 | } | |
374 | ||
375 | /*-------------------------------------------------------------------------*/ | |
376 | ||
377 | static void rx_complete (struct urb *urb, struct pt_regs *regs) | |
378 | { | |
379 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
380 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
381 | struct usbnet *dev = entry->dev; | |
382 | int urb_status = urb->status; | |
383 | ||
384 | skb_put (skb, urb->actual_length); | |
385 | entry->state = rx_done; | |
386 | entry->urb = NULL; | |
387 | ||
388 | switch (urb_status) { | |
389 | // success | |
390 | case 0: | |
f29fc259 | 391 | if (skb->len < dev->net->hard_header_len) { |
1da177e4 LT |
392 | entry->state = rx_cleanup; |
393 | dev->stats.rx_errors++; | |
394 | dev->stats.rx_length_errors++; | |
395 | if (netif_msg_rx_err (dev)) | |
396 | devdbg (dev, "rx length %d", skb->len); | |
397 | } | |
398 | break; | |
399 | ||
400 | // stalls need manual reset. this is rare ... except that | |
401 | // when going through USB 2.0 TTs, unplug appears this way. | |
402 | // we avoid the highspeed version of the ETIMEOUT/EILSEQ | |
403 | // storm, recovering as needed. | |
404 | case -EPIPE: | |
405 | dev->stats.rx_errors++; | |
2e55cc72 | 406 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
407 | // FALLTHROUGH |
408 | ||
409 | // software-driven interface shutdown | |
410 | case -ECONNRESET: // async unlink | |
411 | case -ESHUTDOWN: // hardware gone | |
412 | if (netif_msg_ifdown (dev)) | |
413 | devdbg (dev, "rx shutdown, code %d", urb_status); | |
414 | goto block; | |
415 | ||
416 | // we get controller i/o faults during khubd disconnect() delays. | |
417 | // throttle down resubmits, to avoid log floods; just temporarily, | |
418 | // so we still recover when the fault isn't a khubd delay. | |
419 | case -EPROTO: // ehci | |
420 | case -ETIMEDOUT: // ohci | |
421 | case -EILSEQ: // uhci | |
422 | dev->stats.rx_errors++; | |
423 | if (!timer_pending (&dev->delay)) { | |
424 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
425 | if (netif_msg_link (dev)) | |
426 | devdbg (dev, "rx throttle %d", urb_status); | |
427 | } | |
428 | block: | |
429 | entry->state = rx_cleanup; | |
430 | entry->urb = urb; | |
431 | urb = NULL; | |
432 | break; | |
433 | ||
434 | // data overrun ... flush fifo? | |
435 | case -EOVERFLOW: | |
436 | dev->stats.rx_over_errors++; | |
437 | // FALLTHROUGH | |
438 | ||
439 | default: | |
440 | entry->state = rx_cleanup; | |
441 | dev->stats.rx_errors++; | |
442 | if (netif_msg_rx_err (dev)) | |
443 | devdbg (dev, "rx status %d", urb_status); | |
444 | break; | |
445 | } | |
446 | ||
8728b834 | 447 | defer_bh(dev, skb, &dev->rxq); |
1da177e4 LT |
448 | |
449 | if (urb) { | |
450 | if (netif_running (dev->net) | |
451 | && !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
452 | rx_submit (dev, urb, GFP_ATOMIC); | |
453 | return; | |
454 | } | |
455 | usb_free_urb (urb); | |
456 | } | |
457 | if (netif_msg_rx_err (dev)) | |
458 | devdbg (dev, "no read resubmitted"); | |
459 | } | |
460 | ||
461 | static void intr_complete (struct urb *urb, struct pt_regs *regs) | |
462 | { | |
463 | struct usbnet *dev = urb->context; | |
464 | int status = urb->status; | |
465 | ||
466 | switch (status) { | |
467 | /* success */ | |
468 | case 0: | |
469 | dev->driver_info->status(dev, urb); | |
470 | break; | |
471 | ||
472 | /* software-driven interface shutdown */ | |
473 | case -ENOENT: // urb killed | |
474 | case -ESHUTDOWN: // hardware gone | |
475 | if (netif_msg_ifdown (dev)) | |
476 | devdbg (dev, "intr shutdown, code %d", status); | |
477 | return; | |
478 | ||
479 | /* NOTE: not throttling like RX/TX, since this endpoint | |
480 | * already polls infrequently | |
481 | */ | |
482 | default: | |
483 | devdbg (dev, "intr status %d", status); | |
484 | break; | |
485 | } | |
486 | ||
487 | if (!netif_running (dev->net)) | |
488 | return; | |
489 | ||
490 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
491 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
492 | if (status != 0 && netif_msg_timer (dev)) | |
493 | deverr(dev, "intr resubmit --> %d", status); | |
494 | } | |
495 | ||
496 | /*-------------------------------------------------------------------------*/ | |
497 | ||
498 | // unlink pending rx/tx; completion handlers do all other cleanup | |
499 | ||
500 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
501 | { | |
502 | unsigned long flags; | |
503 | struct sk_buff *skb, *skbnext; | |
504 | int count = 0; | |
505 | ||
506 | spin_lock_irqsave (&q->lock, flags); | |
507 | for (skb = q->next; skb != (struct sk_buff *) q; skb = skbnext) { | |
508 | struct skb_data *entry; | |
509 | struct urb *urb; | |
510 | int retval; | |
511 | ||
512 | entry = (struct skb_data *) skb->cb; | |
513 | urb = entry->urb; | |
514 | skbnext = skb->next; | |
515 | ||
516 | // during some PM-driven resume scenarios, | |
517 | // these (async) unlinks complete immediately | |
518 | retval = usb_unlink_urb (urb); | |
519 | if (retval != -EINPROGRESS && retval != 0) | |
520 | devdbg (dev, "unlink urb err, %d", retval); | |
521 | else | |
522 | count++; | |
523 | } | |
524 | spin_unlock_irqrestore (&q->lock, flags); | |
525 | return count; | |
526 | } | |
527 | ||
528 | ||
529 | /*-------------------------------------------------------------------------*/ | |
530 | ||
531 | // precondition: never called in_interrupt | |
532 | ||
533 | static int usbnet_stop (struct net_device *net) | |
534 | { | |
535 | struct usbnet *dev = netdev_priv(net); | |
536 | int temp; | |
537 | DECLARE_WAIT_QUEUE_HEAD (unlink_wakeup); | |
538 | DECLARE_WAITQUEUE (wait, current); | |
539 | ||
540 | netif_stop_queue (net); | |
541 | ||
542 | if (netif_msg_ifdown (dev)) | |
543 | devinfo (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld", | |
544 | dev->stats.rx_packets, dev->stats.tx_packets, | |
545 | dev->stats.rx_errors, dev->stats.tx_errors | |
546 | ); | |
547 | ||
548 | // ensure there are no more active urbs | |
549 | add_wait_queue (&unlink_wakeup, &wait); | |
550 | dev->wait = &unlink_wakeup; | |
551 | temp = unlink_urbs (dev, &dev->txq) + unlink_urbs (dev, &dev->rxq); | |
552 | ||
553 | // maybe wait for deletions to finish. | |
b03efcfb DM |
554 | while (!skb_queue_empty(&dev->rxq) && |
555 | !skb_queue_empty(&dev->txq) && | |
556 | !skb_queue_empty(&dev->done)) { | |
1da177e4 LT |
557 | msleep(UNLINK_TIMEOUT_MS); |
558 | if (netif_msg_ifdown (dev)) | |
559 | devdbg (dev, "waited for %d urb completions", temp); | |
560 | } | |
561 | dev->wait = NULL; | |
562 | remove_wait_queue (&unlink_wakeup, &wait); | |
563 | ||
564 | usb_kill_urb(dev->interrupt); | |
565 | ||
566 | /* deferred work (task, timer, softirq) must also stop. | |
567 | * can't flush_scheduled_work() until we drop rtnl (later), | |
568 | * else workers could deadlock; so make workers a NOP. | |
569 | */ | |
570 | dev->flags = 0; | |
571 | del_timer_sync (&dev->delay); | |
572 | tasklet_kill (&dev->bh); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
577 | /*-------------------------------------------------------------------------*/ | |
578 | ||
579 | // posts reads, and enables write queuing | |
580 | ||
581 | // precondition: never called in_interrupt | |
582 | ||
583 | static int usbnet_open (struct net_device *net) | |
584 | { | |
585 | struct usbnet *dev = netdev_priv(net); | |
586 | int retval = 0; | |
587 | struct driver_info *info = dev->driver_info; | |
588 | ||
589 | // put into "known safe" state | |
590 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
591 | if (netif_msg_ifup (dev)) | |
592 | devinfo (dev, | |
593 | "open reset fail (%d) usbnet usb-%s-%s, %s", | |
594 | retval, | |
595 | dev->udev->bus->bus_name, dev->udev->devpath, | |
596 | info->description); | |
597 | goto done; | |
598 | } | |
599 | ||
600 | // insist peer be connected | |
601 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
602 | if (netif_msg_ifup (dev)) | |
603 | devdbg (dev, "can't open; %d", retval); | |
604 | goto done; | |
605 | } | |
606 | ||
607 | /* start any status interrupt transfer */ | |
608 | if (dev->interrupt) { | |
609 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
610 | if (retval < 0) { | |
611 | if (netif_msg_ifup (dev)) | |
612 | deverr (dev, "intr submit %d", retval); | |
613 | goto done; | |
614 | } | |
615 | } | |
616 | ||
617 | netif_start_queue (net); | |
618 | if (netif_msg_ifup (dev)) { | |
619 | char *framing; | |
620 | ||
621 | if (dev->driver_info->flags & FLAG_FRAMING_NC) | |
622 | framing = "NetChip"; | |
623 | else if (dev->driver_info->flags & FLAG_FRAMING_GL) | |
624 | framing = "GeneSys"; | |
625 | else if (dev->driver_info->flags & FLAG_FRAMING_Z) | |
626 | framing = "Zaurus"; | |
627 | else if (dev->driver_info->flags & FLAG_FRAMING_RN) | |
628 | framing = "RNDIS"; | |
629 | else if (dev->driver_info->flags & FLAG_FRAMING_AX) | |
630 | framing = "ASIX"; | |
631 | else | |
632 | framing = "simple"; | |
633 | ||
634 | devinfo (dev, "open: enable queueing " | |
635 | "(rx %d, tx %d) mtu %d %s framing", | |
636 | RX_QLEN (dev), TX_QLEN (dev), dev->net->mtu, | |
637 | framing); | |
638 | } | |
639 | ||
640 | // delay posting reads until we're fully open | |
641 | tasklet_schedule (&dev->bh); | |
642 | done: | |
643 | return retval; | |
644 | } | |
645 | ||
646 | /*-------------------------------------------------------------------------*/ | |
647 | ||
2e55cc72 DB |
648 | /* ethtool methods; minidrivers may need to add some more, but |
649 | * they'll probably want to use this base set. | |
650 | */ | |
651 | ||
652 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) | |
1da177e4 LT |
653 | { |
654 | struct usbnet *dev = netdev_priv(net); | |
655 | ||
2e55cc72 | 656 | /* REVISIT don't always return "usbnet" */ |
1da177e4 LT |
657 | strncpy (info->driver, driver_name, sizeof info->driver); |
658 | strncpy (info->version, DRIVER_VERSION, sizeof info->version); | |
659 | strncpy (info->fw_version, dev->driver_info->description, | |
660 | sizeof info->fw_version); | |
661 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
662 | } | |
2e55cc72 | 663 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 LT |
664 | |
665 | static u32 usbnet_get_link (struct net_device *net) | |
666 | { | |
667 | struct usbnet *dev = netdev_priv(net); | |
668 | ||
f29fc259 | 669 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
670 | if (dev->driver_info->check_connect) |
671 | return dev->driver_info->check_connect (dev) == 0; | |
672 | ||
f29fc259 | 673 | /* Otherwise, say we're up (to avoid breaking scripts) */ |
1da177e4 LT |
674 | return 1; |
675 | } | |
676 | ||
2e55cc72 | 677 | u32 usbnet_get_msglevel (struct net_device *net) |
1da177e4 LT |
678 | { |
679 | struct usbnet *dev = netdev_priv(net); | |
680 | ||
681 | return dev->msg_enable; | |
682 | } | |
2e55cc72 | 683 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); |
1da177e4 | 684 | |
2e55cc72 | 685 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
1da177e4 LT |
686 | { |
687 | struct usbnet *dev = netdev_priv(net); | |
688 | ||
689 | dev->msg_enable = level; | |
690 | } | |
2e55cc72 | 691 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
1da177e4 | 692 | |
2e55cc72 DB |
693 | /* drivers may override default ethtool_ops in their bind() routine */ |
694 | static struct ethtool_ops usbnet_ethtool_ops = { | |
695 | .get_drvinfo = usbnet_get_drvinfo, | |
696 | .get_link = usbnet_get_link, | |
697 | .get_msglevel = usbnet_get_msglevel, | |
698 | .set_msglevel = usbnet_set_msglevel, | |
699 | }; | |
1da177e4 LT |
700 | |
701 | /*-------------------------------------------------------------------------*/ | |
702 | ||
703 | /* work that cannot be done in interrupt context uses keventd. | |
704 | * | |
705 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
706 | * especially now that control transfers can be queued. | |
707 | */ | |
708 | static void | |
709 | kevent (void *data) | |
710 | { | |
711 | struct usbnet *dev = data; | |
712 | int status; | |
713 | ||
714 | /* usb_clear_halt() needs a thread context */ | |
715 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
716 | unlink_urbs (dev, &dev->txq); | |
717 | status = usb_clear_halt (dev->udev, dev->out); | |
f29fc259 DB |
718 | if (status < 0 |
719 | && status != -EPIPE | |
720 | && status != -ESHUTDOWN) { | |
1da177e4 LT |
721 | if (netif_msg_tx_err (dev)) |
722 | deverr (dev, "can't clear tx halt, status %d", | |
723 | status); | |
724 | } else { | |
725 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
726 | if (status != -ESHUTDOWN) |
727 | netif_wake_queue (dev->net); | |
1da177e4 LT |
728 | } |
729 | } | |
730 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
731 | unlink_urbs (dev, &dev->rxq); | |
732 | status = usb_clear_halt (dev->udev, dev->in); | |
f29fc259 DB |
733 | if (status < 0 |
734 | && status != -EPIPE | |
735 | && status != -ESHUTDOWN) { | |
1da177e4 LT |
736 | if (netif_msg_rx_err (dev)) |
737 | deverr (dev, "can't clear rx halt, status %d", | |
738 | status); | |
739 | } else { | |
740 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
741 | tasklet_schedule (&dev->bh); | |
742 | } | |
743 | } | |
744 | ||
745 | /* tasklet could resubmit itself forever if memory is tight */ | |
746 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
747 | struct urb *urb = NULL; | |
748 | ||
749 | if (netif_running (dev->net)) | |
750 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
751 | else | |
752 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
753 | if (urb != NULL) { | |
754 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
755 | rx_submit (dev, urb, GFP_KERNEL); | |
756 | tasklet_schedule (&dev->bh); | |
757 | } | |
758 | } | |
759 | ||
7ea13c9c DH |
760 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
761 | struct driver_info *info = dev->driver_info; | |
762 | int retval = 0; | |
763 | ||
764 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
765 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { | |
766 | devinfo(dev, "link reset failed (%d) usbnet usb-%s-%s, %s", | |
767 | retval, | |
768 | dev->udev->bus->bus_name, dev->udev->devpath, | |
769 | info->description); | |
770 | } | |
771 | } | |
772 | ||
1da177e4 LT |
773 | if (dev->flags) |
774 | devdbg (dev, "kevent done, flags = 0x%lx", | |
775 | dev->flags); | |
776 | } | |
777 | ||
778 | /*-------------------------------------------------------------------------*/ | |
779 | ||
780 | static void tx_complete (struct urb *urb, struct pt_regs *regs) | |
781 | { | |
782 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
783 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
784 | struct usbnet *dev = entry->dev; | |
785 | ||
786 | if (urb->status == 0) { | |
787 | dev->stats.tx_packets++; | |
788 | dev->stats.tx_bytes += entry->length; | |
789 | } else { | |
790 | dev->stats.tx_errors++; | |
791 | ||
792 | switch (urb->status) { | |
793 | case -EPIPE: | |
2e55cc72 | 794 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
795 | break; |
796 | ||
797 | /* software-driven interface shutdown */ | |
798 | case -ECONNRESET: // async unlink | |
799 | case -ESHUTDOWN: // hardware gone | |
800 | break; | |
801 | ||
802 | // like rx, tx gets controller i/o faults during khubd delays | |
803 | // and so it uses the same throttling mechanism. | |
804 | case -EPROTO: // ehci | |
805 | case -ETIMEDOUT: // ohci | |
806 | case -EILSEQ: // uhci | |
807 | if (!timer_pending (&dev->delay)) { | |
808 | mod_timer (&dev->delay, | |
809 | jiffies + THROTTLE_JIFFIES); | |
810 | if (netif_msg_link (dev)) | |
811 | devdbg (dev, "tx throttle %d", | |
812 | urb->status); | |
813 | } | |
814 | netif_stop_queue (dev->net); | |
815 | break; | |
816 | default: | |
817 | if (netif_msg_tx_err (dev)) | |
818 | devdbg (dev, "tx err %d", entry->urb->status); | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
823 | urb->dev = NULL; | |
824 | entry->state = tx_done; | |
8728b834 | 825 | defer_bh(dev, skb, &dev->txq); |
1da177e4 LT |
826 | } |
827 | ||
828 | /*-------------------------------------------------------------------------*/ | |
829 | ||
830 | static void usbnet_tx_timeout (struct net_device *net) | |
831 | { | |
832 | struct usbnet *dev = netdev_priv(net); | |
833 | ||
834 | unlink_urbs (dev, &dev->txq); | |
835 | tasklet_schedule (&dev->bh); | |
836 | ||
837 | // FIXME: device recovery -- reset? | |
838 | } | |
839 | ||
840 | /*-------------------------------------------------------------------------*/ | |
841 | ||
842 | static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net) | |
843 | { | |
844 | struct usbnet *dev = netdev_priv(net); | |
845 | int length; | |
846 | int retval = NET_XMIT_SUCCESS; | |
847 | struct urb *urb = NULL; | |
848 | struct skb_data *entry; | |
849 | struct driver_info *info = dev->driver_info; | |
850 | unsigned long flags; | |
1da177e4 LT |
851 | |
852 | // some devices want funky USB-level framing, for | |
853 | // win32 driver (usually) and/or hardware quirks | |
854 | if (info->tx_fixup) { | |
855 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
856 | if (!skb) { | |
857 | if (netif_msg_tx_err (dev)) | |
858 | devdbg (dev, "can't tx_fixup skb"); | |
859 | goto drop; | |
860 | } | |
861 | } | |
862 | length = skb->len; | |
863 | ||
864 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
865 | if (netif_msg_tx_err (dev)) | |
866 | devdbg (dev, "no urb"); | |
867 | goto drop; | |
868 | } | |
869 | ||
870 | entry = (struct skb_data *) skb->cb; | |
871 | entry->urb = urb; | |
872 | entry->dev = dev; | |
873 | entry->state = tx_start; | |
874 | entry->length = length; | |
875 | ||
1da177e4 LT |
876 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
877 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
878 | |
879 | /* don't assume the hardware handles USB_ZERO_PACKET | |
880 | * NOTE: strictly conforming cdc-ether devices should expect | |
881 | * the ZLP here, but ignore the one-byte packet. | |
882 | * | |
883 | * FIXME zero that byte, if it doesn't require a new skb. | |
884 | */ | |
885 | if ((length % dev->maxpacket) == 0) | |
886 | urb->transfer_buffer_length++; | |
887 | ||
888 | spin_lock_irqsave (&dev->txq.lock, flags); | |
889 | ||
1da177e4 LT |
890 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
891 | case -EPIPE: | |
892 | netif_stop_queue (net); | |
2e55cc72 | 893 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
894 | break; |
895 | default: | |
896 | if (netif_msg_tx_err (dev)) | |
897 | devdbg (dev, "tx: submit urb err %d", retval); | |
898 | break; | |
899 | case 0: | |
900 | net->trans_start = jiffies; | |
901 | __skb_queue_tail (&dev->txq, skb); | |
902 | if (dev->txq.qlen >= TX_QLEN (dev)) | |
903 | netif_stop_queue (net); | |
904 | } | |
905 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
906 | ||
907 | if (retval) { | |
908 | if (netif_msg_tx_err (dev)) | |
909 | devdbg (dev, "drop, code %d", retval); | |
910 | drop: | |
911 | retval = NET_XMIT_SUCCESS; | |
912 | dev->stats.tx_dropped++; | |
913 | if (skb) | |
914 | dev_kfree_skb_any (skb); | |
915 | usb_free_urb (urb); | |
916 | } else if (netif_msg_tx_queued (dev)) { | |
917 | devdbg (dev, "> tx, len %d, type 0x%x", | |
918 | length, skb->protocol); | |
919 | } | |
920 | return retval; | |
921 | } | |
922 | ||
923 | ||
924 | /*-------------------------------------------------------------------------*/ | |
925 | ||
926 | // tasklet (work deferred from completions, in_irq) or timer | |
927 | ||
928 | static void usbnet_bh (unsigned long param) | |
929 | { | |
930 | struct usbnet *dev = (struct usbnet *) param; | |
931 | struct sk_buff *skb; | |
932 | struct skb_data *entry; | |
933 | ||
934 | while ((skb = skb_dequeue (&dev->done))) { | |
935 | entry = (struct skb_data *) skb->cb; | |
936 | switch (entry->state) { | |
937 | case rx_done: | |
938 | entry->state = rx_cleanup; | |
939 | rx_process (dev, skb); | |
940 | continue; | |
941 | case tx_done: | |
942 | case rx_cleanup: | |
943 | usb_free_urb (entry->urb); | |
944 | dev_kfree_skb (skb); | |
945 | continue; | |
946 | default: | |
947 | devdbg (dev, "bogus skb state %d", entry->state); | |
948 | } | |
949 | } | |
950 | ||
951 | // waiting for all pending urbs to complete? | |
952 | if (dev->wait) { | |
953 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
954 | wake_up (dev->wait); | |
955 | } | |
956 | ||
957 | // or are we maybe short a few urbs? | |
958 | } else if (netif_running (dev->net) | |
959 | && netif_device_present (dev->net) | |
960 | && !timer_pending (&dev->delay) | |
961 | && !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
962 | int temp = dev->rxq.qlen; | |
963 | int qlen = RX_QLEN (dev); | |
964 | ||
965 | if (temp < qlen) { | |
966 | struct urb *urb; | |
967 | int i; | |
968 | ||
969 | // don't refill the queue all at once | |
970 | for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { | |
971 | urb = usb_alloc_urb (0, GFP_ATOMIC); | |
972 | if (urb != NULL) | |
973 | rx_submit (dev, urb, GFP_ATOMIC); | |
974 | } | |
975 | if (temp != dev->rxq.qlen && netif_msg_link (dev)) | |
976 | devdbg (dev, "rxqlen %d --> %d", | |
977 | temp, dev->rxq.qlen); | |
978 | if (dev->rxq.qlen < qlen) | |
979 | tasklet_schedule (&dev->bh); | |
980 | } | |
981 | if (dev->txq.qlen < TX_QLEN (dev)) | |
982 | netif_wake_queue (dev->net); | |
983 | } | |
984 | } | |
985 | ||
986 | ||
987 | \f | |
988 | /*------------------------------------------------------------------------- | |
989 | * | |
990 | * USB Device Driver support | |
991 | * | |
992 | *-------------------------------------------------------------------------*/ | |
993 | ||
994 | // precondition: never called in_interrupt | |
995 | ||
38bde1d4 | 996 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
997 | { |
998 | struct usbnet *dev; | |
999 | struct usb_device *xdev; | |
1000 | struct net_device *net; | |
1001 | ||
1002 | dev = usb_get_intfdata(intf); | |
1003 | usb_set_intfdata(intf, NULL); | |
1004 | if (!dev) | |
1005 | return; | |
1006 | ||
1007 | xdev = interface_to_usbdev (intf); | |
1008 | ||
1009 | if (netif_msg_probe (dev)) | |
38bde1d4 DB |
1010 | devinfo (dev, "unregister '%s' usb-%s-%s, %s", |
1011 | intf->dev.driver->name, | |
1da177e4 LT |
1012 | xdev->bus->bus_name, xdev->devpath, |
1013 | dev->driver_info->description); | |
1014 | ||
1015 | net = dev->net; | |
1016 | unregister_netdev (net); | |
1017 | ||
1018 | /* we don't hold rtnl here ... */ | |
1019 | flush_scheduled_work (); | |
1020 | ||
1021 | if (dev->driver_info->unbind) | |
1022 | dev->driver_info->unbind (dev, intf); | |
1023 | ||
1024 | free_netdev(net); | |
1025 | usb_put_dev (xdev); | |
1026 | } | |
38bde1d4 | 1027 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 LT |
1028 | |
1029 | ||
1030 | /*-------------------------------------------------------------------------*/ | |
1031 | ||
1da177e4 LT |
1032 | // precondition: never called in_interrupt |
1033 | ||
38bde1d4 | 1034 | int |
1da177e4 LT |
1035 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1036 | { | |
1037 | struct usbnet *dev; | |
1038 | struct net_device *net; | |
1039 | struct usb_host_interface *interface; | |
1040 | struct driver_info *info; | |
1041 | struct usb_device *xdev; | |
1042 | int status; | |
1043 | ||
1044 | info = (struct driver_info *) prod->driver_info; | |
1045 | if (!info) { | |
1046 | dev_dbg (&udev->dev, "blacklisted by %s\n", driver_name); | |
1047 | return -ENODEV; | |
1048 | } | |
1049 | xdev = interface_to_usbdev (udev); | |
1050 | interface = udev->cur_altsetting; | |
1051 | ||
1052 | usb_get_dev (xdev); | |
1053 | ||
1054 | status = -ENOMEM; | |
1055 | ||
1056 | // set up our own records | |
1057 | net = alloc_etherdev(sizeof(*dev)); | |
1058 | if (!net) { | |
1059 | dbg ("can't kmalloc dev"); | |
1060 | goto out; | |
1061 | } | |
1062 | ||
1063 | dev = netdev_priv(net); | |
1064 | dev->udev = xdev; | |
1065 | dev->driver_info = info; | |
1066 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV | |
1067 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1068 | skb_queue_head_init (&dev->rxq); | |
1069 | skb_queue_head_init (&dev->txq); | |
1070 | skb_queue_head_init (&dev->done); | |
1071 | dev->bh.func = usbnet_bh; | |
1072 | dev->bh.data = (unsigned long) dev; | |
1073 | INIT_WORK (&dev->kevent, kevent, dev); | |
1074 | dev->delay.function = usbnet_bh; | |
1075 | dev->delay.data = (unsigned long) dev; | |
1076 | init_timer (&dev->delay); | |
1077 | ||
1078 | SET_MODULE_OWNER (net); | |
1079 | dev->net = net; | |
1080 | strcpy (net->name, "usb%d"); | |
1081 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1082 | ||
2e55cc72 DB |
1083 | /* rx and tx sides can use different message sizes; |
1084 | * bind() should set rx_urb_size in that case. | |
1085 | */ | |
1086 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1087 | #if 0 |
1088 | // dma_supported() is deeply broken on almost all architectures | |
1089 | // possible with some EHCI controllers | |
1090 | if (dma_supported (&udev->dev, DMA_64BIT_MASK)) | |
1091 | net->features |= NETIF_F_HIGHDMA; | |
1092 | #endif | |
1093 | ||
1094 | net->change_mtu = usbnet_change_mtu; | |
1095 | net->get_stats = usbnet_get_stats; | |
1096 | net->hard_start_xmit = usbnet_start_xmit; | |
1097 | net->open = usbnet_open; | |
1098 | net->stop = usbnet_stop; | |
1099 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; | |
1100 | net->tx_timeout = usbnet_tx_timeout; | |
1da177e4 LT |
1101 | net->ethtool_ops = &usbnet_ethtool_ops; |
1102 | ||
1103 | // allow device-specific bind/init procedures | |
1104 | // NOTE net->name still not usable ... | |
1105 | if (info->bind) { | |
1106 | status = info->bind (dev, udev); | |
1107 | // heuristic: "usb%d" for links we know are two-host, | |
1108 | // else "eth%d" when there's reasonable doubt. userspace | |
1109 | // can rename the link if it knows better. | |
1110 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 | |
1111 | && (net->dev_addr [0] & 0x02) == 0) | |
1112 | strcpy (net->name, "eth%d"); | |
f29fc259 DB |
1113 | |
1114 | /* maybe the remote can't receive an Ethernet MTU */ | |
1115 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1116 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1117 | } else if (!info->in || !info->out) |
1118 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1119 | else { |
1120 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1121 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1122 | if (!(info->flags & FLAG_NO_SETINT)) | |
1123 | status = usb_set_interface (xdev, | |
1124 | interface->desc.bInterfaceNumber, | |
1125 | interface->desc.bAlternateSetting); | |
1126 | else | |
1127 | status = 0; | |
1128 | ||
1129 | } | |
1da177e4 LT |
1130 | if (status == 0 && dev->status) |
1131 | status = init_status (dev, udev); | |
1132 | if (status < 0) | |
1133 | goto out1; | |
1134 | ||
2e55cc72 DB |
1135 | if (!dev->rx_urb_size) |
1136 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 LT |
1137 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
1138 | ||
1139 | SET_NETDEV_DEV(net, &udev->dev); | |
1140 | status = register_netdev (net); | |
1141 | if (status) | |
1142 | goto out3; | |
1143 | if (netif_msg_probe (dev)) | |
38bde1d4 | 1144 | devinfo (dev, "register '%s' at usb-%s-%s, %s, " |
1da177e4 | 1145 | "%02x:%02x:%02x:%02x:%02x:%02x", |
38bde1d4 | 1146 | udev->dev.driver->name, |
1da177e4 LT |
1147 | xdev->bus->bus_name, xdev->devpath, |
1148 | dev->driver_info->description, | |
1149 | net->dev_addr [0], net->dev_addr [1], | |
1150 | net->dev_addr [2], net->dev_addr [3], | |
1151 | net->dev_addr [4], net->dev_addr [5]); | |
1152 | ||
1153 | // ok, it's ready to go. | |
1154 | usb_set_intfdata (udev, dev); | |
1155 | ||
1156 | // start as if the link is up | |
1157 | netif_device_attach (net); | |
1158 | ||
1159 | return 0; | |
1160 | ||
1161 | out3: | |
1162 | if (info->unbind) | |
1163 | info->unbind (dev, udev); | |
1164 | out1: | |
1165 | free_netdev(net); | |
1166 | out: | |
1167 | usb_put_dev(xdev); | |
1168 | return status; | |
1169 | } | |
38bde1d4 | 1170 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1171 | |
1172 | /*-------------------------------------------------------------------------*/ | |
1173 | ||
38bde1d4 DB |
1174 | /* FIXME these suspend/resume methods assume non-CDC style |
1175 | * devices, with only one interface. | |
1176 | */ | |
1da177e4 | 1177 | |
38bde1d4 | 1178 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1179 | { |
1180 | struct usbnet *dev = usb_get_intfdata(intf); | |
1181 | ||
27d72e85 DB |
1182 | /* accelerate emptying of the rx and queues, to avoid |
1183 | * having everything error out. | |
1184 | */ | |
1da177e4 | 1185 | netif_device_detach (dev->net); |
27d72e85 DB |
1186 | (void) unlink_urbs (dev, &dev->rxq); |
1187 | (void) unlink_urbs (dev, &dev->txq); | |
1188 | intf->dev.power.power_state = PMSG_SUSPEND; | |
1da177e4 LT |
1189 | return 0; |
1190 | } | |
38bde1d4 | 1191 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1192 | |
38bde1d4 | 1193 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1194 | { |
1195 | struct usbnet *dev = usb_get_intfdata(intf); | |
1196 | ||
27d72e85 | 1197 | intf->dev.power.power_state = PMSG_ON; |
1da177e4 | 1198 | netif_device_attach (dev->net); |
27d72e85 | 1199 | tasklet_schedule (&dev->bh); |
1da177e4 LT |
1200 | return 0; |
1201 | } | |
38bde1d4 | 1202 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1203 | |
1da177e4 | 1204 | |
1da177e4 LT |
1205 | /*-------------------------------------------------------------------------*/ |
1206 | ||
f29fc259 | 1207 | static int __init usbnet_init(void) |
1da177e4 | 1208 | { |
090ffa9d | 1209 | /* compiler should optimize this out */ |
1da177e4 LT |
1210 | BUG_ON (sizeof (((struct sk_buff *)0)->cb) |
1211 | < sizeof (struct skb_data)); | |
1da177e4 LT |
1212 | |
1213 | random_ether_addr(node_id); | |
090ffa9d | 1214 | return 0; |
1da177e4 | 1215 | } |
f29fc259 | 1216 | module_init(usbnet_init); |
1da177e4 | 1217 | |
f29fc259 | 1218 | static void __exit usbnet_exit(void) |
1da177e4 | 1219 | { |
1da177e4 | 1220 | } |
f29fc259 | 1221 | module_exit(usbnet_exit); |
1da177e4 | 1222 | |
f29fc259 | 1223 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1224 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1225 | MODULE_LICENSE("GPL"); |