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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 | ||
1da177e4 | 36 | #include <linux/module.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/etherdevice.h> | |
03ad032b | 40 | #include <linux/ctype.h> |
1da177e4 LT |
41 | #include <linux/ethtool.h> |
42 | #include <linux/workqueue.h> | |
43 | #include <linux/mii.h> | |
1da177e4 | 44 | #include <linux/usb.h> |
3692e94f | 45 | #include <linux/usb/usbnet.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
f29fc259 DB |
47 | |
48 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
49 | |
50 | ||
51 | /*-------------------------------------------------------------------------*/ | |
52 | ||
53 | /* | |
54 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
55 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
56 | * One maximum size Ethernet packet takes twenty four of them. | |
57 | * For high speed, each frame comfortably fits almost 36 max size | |
58 | * Ethernet packets (so queues should be bigger). | |
f29fc259 DB |
59 | * |
60 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to | |
61 | * let the USB host controller be busy for 5msec or more before an irq | |
62 | * is required, under load. Jumbograms change the equation. | |
1da177e4 | 63 | */ |
a99c1949 JP |
64 | #define RX_MAX_QUEUE_MEMORY (60 * 1518) |
65 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
66 | (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4) | |
67 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
68 | (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4) | |
1da177e4 | 69 | |
1da177e4 LT |
70 | // reawaken network queue this soon after stopping; else watchdog barks |
71 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
72 | ||
73 | // throttle rx/tx briefly after some faults, so khubd might disconnect() | |
74 | // us (it polls at HZ/4 usually) before we report too many false errors. | |
75 | #define THROTTLE_JIFFIES (HZ/8) | |
76 | ||
1da177e4 LT |
77 | // between wakeups |
78 | #define UNLINK_TIMEOUT_MS 3 | |
79 | ||
80 | /*-------------------------------------------------------------------------*/ | |
81 | ||
82 | // randomly generated ethernet address | |
83 | static u8 node_id [ETH_ALEN]; | |
84 | ||
1da177e4 LT |
85 | static const char driver_name [] = "usbnet"; |
86 | ||
87 | /* use ethtool to change the level for any given device */ | |
88 | static int msg_level = -1; | |
89 | module_param (msg_level, int, 0); | |
90 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
91 | ||
1da177e4 LT |
92 | /*-------------------------------------------------------------------------*/ |
93 | ||
1da177e4 | 94 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 95 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
96 | { |
97 | int tmp; | |
98 | struct usb_host_interface *alt = NULL; | |
99 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
100 | struct usb_host_endpoint *status = NULL; | |
101 | ||
102 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
103 | unsigned ep; | |
104 | ||
105 | in = out = status = NULL; | |
106 | alt = intf->altsetting + tmp; | |
107 | ||
108 | /* take the first altsetting with in-bulk + out-bulk; | |
109 | * remember any status endpoint, just in case; | |
110 | * ignore other endpoints and altsetttings. | |
111 | */ | |
112 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
113 | struct usb_host_endpoint *e; | |
114 | int intr = 0; | |
115 | ||
116 | e = alt->endpoint + ep; | |
117 | switch (e->desc.bmAttributes) { | |
118 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 119 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
120 | continue; |
121 | intr = 1; | |
122 | /* FALLTHROUGH */ | |
123 | case USB_ENDPOINT_XFER_BULK: | |
124 | break; | |
125 | default: | |
126 | continue; | |
127 | } | |
fc6e2544 | 128 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
129 | if (!intr && !in) |
130 | in = e; | |
131 | else if (intr && !status) | |
132 | status = e; | |
133 | } else { | |
134 | if (!out) | |
135 | out = e; | |
136 | } | |
137 | } | |
138 | if (in && out) | |
139 | break; | |
140 | } | |
141 | if (!alt || !in || !out) | |
142 | return -EINVAL; | |
143 | ||
8e95a202 JP |
144 | if (alt->desc.bAlternateSetting != 0 || |
145 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
146 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
147 | alt->desc.bAlternateSetting); | |
148 | if (tmp < 0) | |
149 | return tmp; | |
150 | } | |
cb1cebbe | 151 | |
1da177e4 LT |
152 | dev->in = usb_rcvbulkpipe (dev->udev, |
153 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
154 | dev->out = usb_sndbulkpipe (dev->udev, | |
155 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
156 | dev->status = status; | |
157 | return 0; | |
158 | } | |
2e55cc72 | 159 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 160 | |
03ad032b PH |
161 | static u8 nibble(unsigned char c) |
162 | { | |
163 | if (likely(isdigit(c))) | |
164 | return c - '0'; | |
165 | c = toupper(c); | |
166 | if (likely(isxdigit(c))) | |
167 | return 10 + c - 'A'; | |
168 | return 0; | |
169 | } | |
170 | ||
171 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) | |
172 | { | |
173 | int tmp, i; | |
174 | unsigned char buf [13]; | |
175 | ||
176 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); | |
177 | if (tmp != 12) { | |
178 | dev_dbg(&dev->udev->dev, | |
179 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
180 | if (tmp >= 0) | |
181 | tmp = -EINVAL; | |
182 | return tmp; | |
183 | } | |
184 | for (i = tmp = 0; i < 6; i++, tmp += 2) | |
185 | dev->net->dev_addr [i] = | |
186 | (nibble(buf [tmp]) << 4) + nibble(buf [tmp + 1]); | |
187 | return 0; | |
188 | } | |
189 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
190 | ||
7d12e780 | 191 | static void intr_complete (struct urb *urb); |
1da177e4 LT |
192 | |
193 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
194 | { | |
195 | char *buf = NULL; | |
196 | unsigned pipe = 0; | |
197 | unsigned maxp; | |
198 | unsigned period; | |
199 | ||
200 | if (!dev->driver_info->status) | |
201 | return 0; | |
202 | ||
203 | pipe = usb_rcvintpipe (dev->udev, | |
204 | dev->status->desc.bEndpointAddress | |
205 | & USB_ENDPOINT_NUMBER_MASK); | |
206 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
207 | ||
208 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
209 | period = max ((int) dev->status->desc.bInterval, | |
210 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
211 | ||
e94b1766 | 212 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 213 | if (buf) { |
e94b1766 | 214 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
215 | if (!dev->interrupt) { |
216 | kfree (buf); | |
217 | return -ENOMEM; | |
218 | } else { | |
219 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
220 | buf, maxp, intr_complete, dev, period); | |
221 | dev_dbg(&intf->dev, | |
222 | "status ep%din, %d bytes period %d\n", | |
223 | usb_pipeendpoint(pipe), maxp, period); | |
224 | } | |
225 | } | |
18ab458f | 226 | return 0; |
1da177e4 LT |
227 | } |
228 | ||
2e55cc72 DB |
229 | /* Passes this packet up the stack, updating its accounting. |
230 | * Some link protocols batch packets, so their rx_fixup paths | |
231 | * can return clones as well as just modify the original skb. | |
232 | */ | |
233 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
234 | { |
235 | int status; | |
236 | ||
7834ddbc JK |
237 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
238 | skb_queue_tail(&dev->rxq_pause, skb); | |
239 | return; | |
240 | } | |
241 | ||
1da177e4 | 242 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
243 | dev->net->stats.rx_packets++; |
244 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 245 | |
a475f603 JP |
246 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
247 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 LT |
248 | memset (skb->cb, 0, sizeof (struct skb_data)); |
249 | status = netif_rx (skb); | |
a475f603 JP |
250 | if (status != NET_RX_SUCCESS) |
251 | netif_dbg(dev, rx_err, dev->net, | |
252 | "netif_rx status %d\n", status); | |
1da177e4 | 253 | } |
2e55cc72 | 254 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 255 | |
1da177e4 LT |
256 | \f |
257 | /*------------------------------------------------------------------------- | |
258 | * | |
259 | * Network Device Driver (peer link to "Host Device", from USB host) | |
260 | * | |
261 | *-------------------------------------------------------------------------*/ | |
262 | ||
777baa47 | 263 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
264 | { |
265 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 266 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
267 | int old_hard_mtu = dev->hard_mtu; |
268 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 269 | |
a99c1949 | 270 | if (new_mtu <= 0) |
1da177e4 | 271 | return -EINVAL; |
1da177e4 | 272 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 273 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
274 | return -EDOM; |
275 | net->mtu = new_mtu; | |
a99c1949 JP |
276 | |
277 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
278 | if (dev->rx_urb_size == old_hard_mtu) { | |
279 | dev->rx_urb_size = dev->hard_mtu; | |
280 | if (dev->rx_urb_size > old_rx_urb_size) | |
281 | usbnet_unlink_rx_urbs(dev); | |
282 | } | |
283 | ||
1da177e4 LT |
284 | return 0; |
285 | } | |
777baa47 | 286 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 LT |
287 | |
288 | /*-------------------------------------------------------------------------*/ | |
289 | ||
1da177e4 LT |
290 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
291 | * completion callbacks. 2.5 should have fixed those bugs... | |
292 | */ | |
293 | ||
8728b834 | 294 | static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list) |
1da177e4 | 295 | { |
1da177e4 LT |
296 | unsigned long flags; |
297 | ||
8728b834 DM |
298 | spin_lock_irqsave(&list->lock, flags); |
299 | __skb_unlink(skb, list); | |
300 | spin_unlock(&list->lock); | |
301 | spin_lock(&dev->done.lock); | |
302 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 303 | if (dev->done.qlen == 1) |
8728b834 DM |
304 | tasklet_schedule(&dev->bh); |
305 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
1da177e4 LT |
306 | } |
307 | ||
308 | /* some work can't be done in tasklets, so we use keventd | |
309 | * | |
310 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
311 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
312 | */ | |
2e55cc72 | 313 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
314 | { |
315 | set_bit (work, &dev->flags); | |
316 | if (!schedule_work (&dev->kevent)) | |
60b86755 | 317 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); |
1da177e4 | 318 | else |
60b86755 | 319 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
1da177e4 | 320 | } |
2e55cc72 | 321 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
322 | |
323 | /*-------------------------------------------------------------------------*/ | |
324 | ||
7d12e780 | 325 | static void rx_complete (struct urb *urb); |
1da177e4 | 326 | |
55016f10 | 327 | static void rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
328 | { |
329 | struct sk_buff *skb; | |
330 | struct skb_data *entry; | |
331 | int retval = 0; | |
332 | unsigned long lockflags; | |
2e55cc72 | 333 | size_t size = dev->rx_urb_size; |
1da177e4 | 334 | |
1da177e4 | 335 | if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) { |
a475f603 | 336 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 337 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
338 | usb_free_urb (urb); |
339 | return; | |
340 | } | |
341 | skb_reserve (skb, NET_IP_ALIGN); | |
342 | ||
343 | entry = (struct skb_data *) skb->cb; | |
344 | entry->urb = urb; | |
345 | entry->dev = dev; | |
346 | entry->state = rx_start; | |
347 | entry->length = 0; | |
348 | ||
349 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
350 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
351 | |
352 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
353 | ||
8e95a202 JP |
354 | if (netif_running (dev->net) && |
355 | netif_device_present (dev->net) && | |
69ee472f ON |
356 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
357 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 358 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 359 | case -EPIPE: |
2e55cc72 | 360 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
361 | break; |
362 | case -ENOMEM: | |
2e55cc72 | 363 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
364 | break; |
365 | case -ENODEV: | |
a475f603 | 366 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
367 | netif_device_detach (dev->net); |
368 | break; | |
369 | default: | |
a475f603 JP |
370 | netif_dbg(dev, rx_err, dev->net, |
371 | "rx submit, %d\n", retval); | |
1da177e4 LT |
372 | tasklet_schedule (&dev->bh); |
373 | break; | |
374 | case 0: | |
375 | __skb_queue_tail (&dev->rxq, skb); | |
376 | } | |
377 | } else { | |
a475f603 | 378 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
379 | retval = -ENOLINK; |
380 | } | |
381 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
382 | if (retval) { | |
383 | dev_kfree_skb_any (skb); | |
384 | usb_free_urb (urb); | |
385 | } | |
386 | } | |
387 | ||
388 | ||
389 | /*-------------------------------------------------------------------------*/ | |
390 | ||
391 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
392 | { | |
8e95a202 JP |
393 | if (dev->driver_info->rx_fixup && |
394 | !dev->driver_info->rx_fixup (dev, skb)) | |
1da177e4 LT |
395 | goto error; |
396 | // else network stack removes extra byte if we forced a short packet | |
397 | ||
398 | if (skb->len) | |
2e55cc72 | 399 | usbnet_skb_return (dev, skb); |
1da177e4 | 400 | else { |
a475f603 | 401 | netif_dbg(dev, rx_err, dev->net, "drop\n"); |
1da177e4 | 402 | error: |
7963837f | 403 | dev->net->stats.rx_errors++; |
1da177e4 LT |
404 | skb_queue_tail (&dev->done, skb); |
405 | } | |
406 | } | |
407 | ||
408 | /*-------------------------------------------------------------------------*/ | |
409 | ||
7d12e780 | 410 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
411 | { |
412 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
413 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
414 | struct usbnet *dev = entry->dev; | |
415 | int urb_status = urb->status; | |
416 | ||
417 | skb_put (skb, urb->actual_length); | |
418 | entry->state = rx_done; | |
419 | entry->urb = NULL; | |
420 | ||
421 | switch (urb_status) { | |
18ab458f DB |
422 | /* success */ |
423 | case 0: | |
f29fc259 | 424 | if (skb->len < dev->net->hard_header_len) { |
1da177e4 | 425 | entry->state = rx_cleanup; |
7963837f HX |
426 | dev->net->stats.rx_errors++; |
427 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
428 | netif_dbg(dev, rx_err, dev->net, |
429 | "rx length %d\n", skb->len); | |
1da177e4 LT |
430 | } |
431 | break; | |
432 | ||
18ab458f DB |
433 | /* stalls need manual reset. this is rare ... except that |
434 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 435 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
436 | * storm, recovering as needed. |
437 | */ | |
438 | case -EPIPE: | |
7963837f | 439 | dev->net->stats.rx_errors++; |
2e55cc72 | 440 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
441 | // FALLTHROUGH |
442 | ||
18ab458f DB |
443 | /* software-driven interface shutdown */ |
444 | case -ECONNRESET: /* async unlink */ | |
445 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
446 | netif_dbg(dev, ifdown, dev->net, |
447 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
448 | goto block; |
449 | ||
18ab458f DB |
450 | /* we get controller i/o faults during khubd disconnect() delays. |
451 | * throttle down resubmits, to avoid log floods; just temporarily, | |
452 | * so we still recover when the fault isn't a khubd delay. | |
453 | */ | |
454 | case -EPROTO: | |
455 | case -ETIME: | |
456 | case -EILSEQ: | |
7963837f | 457 | dev->net->stats.rx_errors++; |
1da177e4 LT |
458 | if (!timer_pending (&dev->delay)) { |
459 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
460 | netif_dbg(dev, link, dev->net, |
461 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
462 | } |
463 | block: | |
464 | entry->state = rx_cleanup; | |
465 | entry->urb = urb; | |
466 | urb = NULL; | |
467 | break; | |
468 | ||
18ab458f DB |
469 | /* data overrun ... flush fifo? */ |
470 | case -EOVERFLOW: | |
7963837f | 471 | dev->net->stats.rx_over_errors++; |
1da177e4 | 472 | // FALLTHROUGH |
cb1cebbe | 473 | |
18ab458f | 474 | default: |
1da177e4 | 475 | entry->state = rx_cleanup; |
7963837f | 476 | dev->net->stats.rx_errors++; |
a475f603 | 477 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
478 | break; |
479 | } | |
480 | ||
8728b834 | 481 | defer_bh(dev, skb, &dev->rxq); |
1da177e4 LT |
482 | |
483 | if (urb) { | |
8e95a202 JP |
484 | if (netif_running (dev->net) && |
485 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
486 | rx_submit (dev, urb, GFP_ATOMIC); |
487 | return; | |
488 | } | |
489 | usb_free_urb (urb); | |
490 | } | |
a475f603 | 491 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
492 | } |
493 | ||
7d12e780 | 494 | static void intr_complete (struct urb *urb) |
1da177e4 LT |
495 | { |
496 | struct usbnet *dev = urb->context; | |
497 | int status = urb->status; | |
498 | ||
499 | switch (status) { | |
18ab458f DB |
500 | /* success */ |
501 | case 0: | |
1da177e4 LT |
502 | dev->driver_info->status(dev, urb); |
503 | break; | |
504 | ||
18ab458f DB |
505 | /* software-driven interface shutdown */ |
506 | case -ENOENT: /* urb killed */ | |
507 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
508 | netif_dbg(dev, ifdown, dev->net, |
509 | "intr shutdown, code %d\n", status); | |
1da177e4 LT |
510 | return; |
511 | ||
18ab458f DB |
512 | /* NOTE: not throttling like RX/TX, since this endpoint |
513 | * already polls infrequently | |
514 | */ | |
515 | default: | |
60b86755 | 516 | netdev_dbg(dev->net, "intr status %d\n", status); |
1da177e4 LT |
517 | break; |
518 | } | |
519 | ||
520 | if (!netif_running (dev->net)) | |
521 | return; | |
522 | ||
523 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
524 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
a475f603 JP |
525 | if (status != 0) |
526 | netif_err(dev, timer, dev->net, | |
527 | "intr resubmit --> %d\n", status); | |
1da177e4 LT |
528 | } |
529 | ||
7834ddbc JK |
530 | /*-------------------------------------------------------------------------*/ |
531 | void usbnet_pause_rx(struct usbnet *dev) | |
532 | { | |
533 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
534 | ||
a475f603 | 535 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
536 | } |
537 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
538 | ||
539 | void usbnet_resume_rx(struct usbnet *dev) | |
540 | { | |
541 | struct sk_buff *skb; | |
542 | int num = 0; | |
543 | ||
544 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
545 | ||
546 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
547 | usbnet_skb_return(dev, skb); | |
548 | num++; | |
549 | } | |
550 | ||
551 | tasklet_schedule(&dev->bh); | |
552 | ||
a475f603 JP |
553 | netif_dbg(dev, rx_status, dev->net, |
554 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
555 | } |
556 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
557 | ||
558 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
559 | { | |
560 | skb_queue_purge(&dev->rxq_pause); | |
561 | } | |
562 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
563 | ||
1da177e4 LT |
564 | /*-------------------------------------------------------------------------*/ |
565 | ||
566 | // unlink pending rx/tx; completion handlers do all other cleanup | |
567 | ||
568 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
569 | { | |
570 | unsigned long flags; | |
571 | struct sk_buff *skb, *skbnext; | |
572 | int count = 0; | |
573 | ||
574 | spin_lock_irqsave (&q->lock, flags); | |
83bfba5f | 575 | skb_queue_walk_safe(q, skb, skbnext) { |
1da177e4 LT |
576 | struct skb_data *entry; |
577 | struct urb *urb; | |
578 | int retval; | |
579 | ||
580 | entry = (struct skb_data *) skb->cb; | |
581 | urb = entry->urb; | |
1da177e4 LT |
582 | |
583 | // during some PM-driven resume scenarios, | |
584 | // these (async) unlinks complete immediately | |
585 | retval = usb_unlink_urb (urb); | |
586 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 587 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
588 | else |
589 | count++; | |
590 | } | |
591 | spin_unlock_irqrestore (&q->lock, flags); | |
592 | return count; | |
593 | } | |
594 | ||
a99c1949 JP |
595 | // Flush all pending rx urbs |
596 | // minidrivers may need to do this when the MTU changes | |
597 | ||
598 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
599 | { | |
600 | if (netif_running(dev->net)) { | |
601 | (void) unlink_urbs (dev, &dev->rxq); | |
602 | tasklet_schedule(&dev->bh); | |
603 | } | |
604 | } | |
605 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
606 | |
607 | /*-------------------------------------------------------------------------*/ | |
608 | ||
609 | // precondition: never called in_interrupt | |
69ee472f ON |
610 | static void usbnet_terminate_urbs(struct usbnet *dev) |
611 | { | |
612 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
613 | DECLARE_WAITQUEUE(wait, current); | |
614 | int temp; | |
615 | ||
616 | /* ensure there are no more active urbs */ | |
617 | add_wait_queue(&unlink_wakeup, &wait); | |
618 | set_current_state(TASK_UNINTERRUPTIBLE); | |
619 | dev->wait = &unlink_wakeup; | |
620 | temp = unlink_urbs(dev, &dev->txq) + | |
621 | unlink_urbs(dev, &dev->rxq); | |
622 | ||
623 | /* maybe wait for deletions to finish. */ | |
624 | while (!skb_queue_empty(&dev->rxq) | |
625 | && !skb_queue_empty(&dev->txq) | |
626 | && !skb_queue_empty(&dev->done)) { | |
627 | schedule_timeout(UNLINK_TIMEOUT_MS); | |
628 | set_current_state(TASK_UNINTERRUPTIBLE); | |
a475f603 JP |
629 | netif_dbg(dev, ifdown, dev->net, |
630 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
631 | } |
632 | set_current_state(TASK_RUNNING); | |
633 | dev->wait = NULL; | |
634 | remove_wait_queue(&unlink_wakeup, &wait); | |
635 | } | |
1da177e4 | 636 | |
777baa47 | 637 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
638 | { |
639 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 640 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 641 | int retval; |
1da177e4 LT |
642 | |
643 | netif_stop_queue (net); | |
644 | ||
a475f603 | 645 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 646 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
647 | net->stats.rx_packets, net->stats.tx_packets, |
648 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 649 | |
a33e9e7f JK |
650 | /* allow minidriver to stop correctly (wireless devices to turn off |
651 | * radio etc) */ | |
652 | if (info->stop) { | |
653 | retval = info->stop(dev); | |
a475f603 JP |
654 | if (retval < 0) |
655 | netif_info(dev, ifdown, dev->net, | |
656 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
657 | retval, | |
658 | dev->udev->bus->bus_name, dev->udev->devpath, | |
659 | info->description); | |
a33e9e7f JK |
660 | } |
661 | ||
69ee472f ON |
662 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
663 | usbnet_terminate_urbs(dev); | |
1da177e4 LT |
664 | |
665 | usb_kill_urb(dev->interrupt); | |
666 | ||
7834ddbc JK |
667 | usbnet_purge_paused_rxq(dev); |
668 | ||
1da177e4 LT |
669 | /* deferred work (task, timer, softirq) must also stop. |
670 | * can't flush_scheduled_work() until we drop rtnl (later), | |
671 | * else workers could deadlock; so make workers a NOP. | |
672 | */ | |
673 | dev->flags = 0; | |
674 | del_timer_sync (&dev->delay); | |
675 | tasklet_kill (&dev->bh); | |
69ee472f ON |
676 | if (info->manage_power) |
677 | info->manage_power(dev, 0); | |
678 | else | |
679 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
680 | |
681 | return 0; | |
682 | } | |
777baa47 | 683 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
684 | |
685 | /*-------------------------------------------------------------------------*/ | |
686 | ||
687 | // posts reads, and enables write queuing | |
688 | ||
689 | // precondition: never called in_interrupt | |
690 | ||
777baa47 | 691 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
692 | { |
693 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 694 | int retval; |
1da177e4 LT |
695 | struct driver_info *info = dev->driver_info; |
696 | ||
a11a6544 | 697 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
698 | netif_info(dev, ifup, dev->net, |
699 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
700 | retval, | |
701 | dev->udev->bus->bus_name, | |
702 | dev->udev->devpath, | |
703 | info->description); | |
a11a6544 ON |
704 | goto done_nopm; |
705 | } | |
706 | ||
1da177e4 LT |
707 | // put into "known safe" state |
708 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
709 | netif_info(dev, ifup, dev->net, |
710 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
711 | retval, | |
712 | dev->udev->bus->bus_name, | |
713 | dev->udev->devpath, | |
714 | info->description); | |
1da177e4 LT |
715 | goto done; |
716 | } | |
717 | ||
718 | // insist peer be connected | |
719 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 720 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
721 | goto done; |
722 | } | |
723 | ||
724 | /* start any status interrupt transfer */ | |
725 | if (dev->interrupt) { | |
726 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
727 | if (retval < 0) { | |
a475f603 JP |
728 | netif_err(dev, ifup, dev->net, |
729 | "intr submit %d\n", retval); | |
1da177e4 LT |
730 | goto done; |
731 | } | |
732 | } | |
733 | ||
734 | netif_start_queue (net); | |
a475f603 JP |
735 | netif_info(dev, ifup, dev->net, |
736 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
737 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
738 | dev->net->mtu, | |
739 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
740 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
741 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
742 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
743 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
744 | "simple"); | |
1da177e4 LT |
745 | |
746 | // delay posting reads until we're fully open | |
747 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
748 | if (info->manage_power) { |
749 | retval = info->manage_power(dev, 1); | |
750 | if (retval < 0) | |
751 | goto done; | |
752 | usb_autopm_put_interface(dev->intf); | |
753 | } | |
a11a6544 | 754 | return retval; |
a475f603 | 755 | |
1da177e4 | 756 | done: |
a11a6544 ON |
757 | usb_autopm_put_interface(dev->intf); |
758 | done_nopm: | |
1da177e4 LT |
759 | return retval; |
760 | } | |
777baa47 | 761 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
762 | |
763 | /*-------------------------------------------------------------------------*/ | |
764 | ||
2e55cc72 DB |
765 | /* ethtool methods; minidrivers may need to add some more, but |
766 | * they'll probably want to use this base set. | |
767 | */ | |
768 | ||
c41286fd AB |
769 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
770 | { | |
771 | struct usbnet *dev = netdev_priv(net); | |
772 | ||
773 | if (!dev->mii.mdio_read) | |
774 | return -EOPNOTSUPP; | |
775 | ||
776 | return mii_ethtool_gset(&dev->mii, cmd); | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
779 | ||
780 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
781 | { | |
782 | struct usbnet *dev = netdev_priv(net); | |
783 | int retval; | |
784 | ||
785 | if (!dev->mii.mdio_write) | |
786 | return -EOPNOTSUPP; | |
787 | ||
788 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
789 | ||
790 | /* link speed/duplex might have changed */ | |
791 | if (dev->driver_info->link_reset) | |
792 | dev->driver_info->link_reset(dev); | |
793 | ||
794 | return retval; | |
795 | ||
796 | } | |
797 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
798 | ||
c41286fd | 799 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
800 | { |
801 | struct usbnet *dev = netdev_priv(net); | |
802 | ||
f29fc259 | 803 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
804 | if (dev->driver_info->check_connect) |
805 | return dev->driver_info->check_connect (dev) == 0; | |
806 | ||
c41286fd AB |
807 | /* if the device has mii operations, use those */ |
808 | if (dev->mii.mdio_read) | |
809 | return mii_link_ok(&dev->mii); | |
810 | ||
05ffb3e2 BM |
811 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
812 | return ethtool_op_get_link(net); | |
1da177e4 | 813 | } |
c41286fd | 814 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 815 | |
18ee91fa | 816 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
817 | { |
818 | struct usbnet *dev = netdev_priv(net); | |
819 | ||
18ee91fa DB |
820 | if (!dev->mii.mdio_write) |
821 | return -EOPNOTSUPP; | |
822 | ||
823 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 824 | } |
18ee91fa | 825 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 826 | |
18ee91fa | 827 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
828 | { |
829 | struct usbnet *dev = netdev_priv(net); | |
830 | ||
296c0242 | 831 | strncpy (info->driver, dev->driver_name, sizeof info->driver); |
18ee91fa DB |
832 | strncpy (info->version, DRIVER_VERSION, sizeof info->version); |
833 | strncpy (info->fw_version, dev->driver_info->description, | |
834 | sizeof info->fw_version); | |
835 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 836 | } |
18ee91fa | 837 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 838 | |
18ee91fa | 839 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
840 | { |
841 | struct usbnet *dev = netdev_priv(net); | |
842 | ||
18ee91fa DB |
843 | return dev->msg_enable; |
844 | } | |
845 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 846 | |
18ee91fa DB |
847 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
848 | { | |
849 | struct usbnet *dev = netdev_priv(net); | |
850 | ||
851 | dev->msg_enable = level; | |
c41286fd | 852 | } |
18ee91fa | 853 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 854 | |
2e55cc72 | 855 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 856 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
857 | .get_settings = usbnet_get_settings, |
858 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 859 | .get_link = usbnet_get_link, |
c41286fd | 860 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 861 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
862 | .get_msglevel = usbnet_get_msglevel, |
863 | .set_msglevel = usbnet_set_msglevel, | |
864 | }; | |
1da177e4 LT |
865 | |
866 | /*-------------------------------------------------------------------------*/ | |
867 | ||
868 | /* work that cannot be done in interrupt context uses keventd. | |
869 | * | |
870 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
871 | * especially now that control transfers can be queued. | |
872 | */ | |
873 | static void | |
c4028958 | 874 | kevent (struct work_struct *work) |
1da177e4 | 875 | { |
c4028958 DH |
876 | struct usbnet *dev = |
877 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
878 | int status; |
879 | ||
880 | /* usb_clear_halt() needs a thread context */ | |
881 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
882 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
883 | status = usb_autopm_get_interface(dev->intf); |
884 | if (status < 0) | |
885 | goto fail_pipe; | |
1da177e4 | 886 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 887 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
888 | if (status < 0 && |
889 | status != -EPIPE && | |
890 | status != -ESHUTDOWN) { | |
1da177e4 | 891 | if (netif_msg_tx_err (dev)) |
69ee472f | 892 | fail_pipe: |
60b86755 JP |
893 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
894 | status); | |
1da177e4 LT |
895 | } else { |
896 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
897 | if (status != -ESHUTDOWN) |
898 | netif_wake_queue (dev->net); | |
1da177e4 LT |
899 | } |
900 | } | |
901 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
902 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
903 | status = usb_autopm_get_interface(dev->intf); |
904 | if (status < 0) | |
905 | goto fail_halt; | |
1da177e4 | 906 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 907 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
908 | if (status < 0 && |
909 | status != -EPIPE && | |
910 | status != -ESHUTDOWN) { | |
1da177e4 | 911 | if (netif_msg_rx_err (dev)) |
69ee472f | 912 | fail_halt: |
60b86755 JP |
913 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
914 | status); | |
1da177e4 LT |
915 | } else { |
916 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
917 | tasklet_schedule (&dev->bh); | |
918 | } | |
919 | } | |
920 | ||
921 | /* tasklet could resubmit itself forever if memory is tight */ | |
922 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
923 | struct urb *urb = NULL; | |
924 | ||
925 | if (netif_running (dev->net)) | |
926 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
927 | else | |
928 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
929 | if (urb != NULL) { | |
930 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f ON |
931 | status = usb_autopm_get_interface(dev->intf); |
932 | if (status < 0) | |
933 | goto fail_lowmem; | |
1da177e4 | 934 | rx_submit (dev, urb, GFP_KERNEL); |
69ee472f ON |
935 | usb_autopm_put_interface(dev->intf); |
936 | fail_lowmem: | |
1da177e4 LT |
937 | tasklet_schedule (&dev->bh); |
938 | } | |
939 | } | |
940 | ||
7ea13c9c | 941 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 942 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
943 | int retval = 0; |
944 | ||
945 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
946 | status = usb_autopm_get_interface(dev->intf); |
947 | if (status < 0) | |
948 | goto skip_reset; | |
7ea13c9c | 949 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
950 | usb_autopm_put_interface(dev->intf); |
951 | skip_reset: | |
60b86755 JP |
952 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
953 | retval, | |
954 | dev->udev->bus->bus_name, | |
955 | dev->udev->devpath, | |
956 | info->description); | |
69ee472f ON |
957 | } else { |
958 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c DH |
959 | } |
960 | } | |
961 | ||
1da177e4 | 962 | if (dev->flags) |
60b86755 | 963 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
964 | } |
965 | ||
966 | /*-------------------------------------------------------------------------*/ | |
967 | ||
7d12e780 | 968 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
969 | { |
970 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
971 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
972 | struct usbnet *dev = entry->dev; | |
973 | ||
974 | if (urb->status == 0) { | |
7963837f HX |
975 | dev->net->stats.tx_packets++; |
976 | dev->net->stats.tx_bytes += entry->length; | |
1da177e4 | 977 | } else { |
7963837f | 978 | dev->net->stats.tx_errors++; |
1da177e4 LT |
979 | |
980 | switch (urb->status) { | |
981 | case -EPIPE: | |
2e55cc72 | 982 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
983 | break; |
984 | ||
985 | /* software-driven interface shutdown */ | |
986 | case -ECONNRESET: // async unlink | |
987 | case -ESHUTDOWN: // hardware gone | |
988 | break; | |
989 | ||
990 | // like rx, tx gets controller i/o faults during khubd delays | |
991 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
992 | case -EPROTO: |
993 | case -ETIME: | |
994 | case -EILSEQ: | |
69ee472f | 995 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
996 | if (!timer_pending (&dev->delay)) { |
997 | mod_timer (&dev->delay, | |
998 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
999 | netif_dbg(dev, link, dev->net, |
1000 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1001 | } |
1002 | netif_stop_queue (dev->net); | |
1003 | break; | |
1004 | default: | |
a475f603 JP |
1005 | netif_dbg(dev, tx_err, dev->net, |
1006 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1007 | break; |
1008 | } | |
1009 | } | |
1010 | ||
69ee472f | 1011 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1012 | urb->dev = NULL; |
1013 | entry->state = tx_done; | |
8728b834 | 1014 | defer_bh(dev, skb, &dev->txq); |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | /*-------------------------------------------------------------------------*/ | |
1018 | ||
777baa47 | 1019 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1020 | { |
1021 | struct usbnet *dev = netdev_priv(net); | |
1022 | ||
1023 | unlink_urbs (dev, &dev->txq); | |
1024 | tasklet_schedule (&dev->bh); | |
1025 | ||
1026 | // FIXME: device recovery -- reset? | |
1027 | } | |
777baa47 | 1028 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1029 | |
1030 | /*-------------------------------------------------------------------------*/ | |
1031 | ||
25a79c41 SH |
1032 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1033 | struct net_device *net) | |
1da177e4 LT |
1034 | { |
1035 | struct usbnet *dev = netdev_priv(net); | |
1036 | int length; | |
1da177e4 LT |
1037 | struct urb *urb = NULL; |
1038 | struct skb_data *entry; | |
1039 | struct driver_info *info = dev->driver_info; | |
1040 | unsigned long flags; | |
25a79c41 | 1041 | int retval; |
1da177e4 LT |
1042 | |
1043 | // some devices want funky USB-level framing, for | |
1044 | // win32 driver (usually) and/or hardware quirks | |
1045 | if (info->tx_fixup) { | |
1046 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1047 | if (!skb) { | |
a475f603 | 1048 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1da177e4 LT |
1049 | goto drop; |
1050 | } | |
1051 | } | |
1052 | length = skb->len; | |
1053 | ||
1054 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1055 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1056 | goto drop; |
1057 | } | |
1058 | ||
1059 | entry = (struct skb_data *) skb->cb; | |
1060 | entry->urb = urb; | |
1061 | entry->dev = dev; | |
1062 | entry->state = tx_start; | |
1063 | entry->length = length; | |
1064 | ||
1da177e4 LT |
1065 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1066 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1067 | |
1068 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1069 | * NOTE: strictly conforming cdc-ether devices should expect | |
1070 | * the ZLP here, but ignore the one-byte packet. | |
1da177e4 | 1071 | */ |
b4d562e3 EP |
1072 | if (length % dev->maxpacket == 0) { |
1073 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
1074 | urb->transfer_buffer_length++; | |
1075 | if (skb_tailroom(skb)) { | |
1076 | skb->data[skb->len] = 0; | |
1077 | __skb_put(skb, 1); | |
1078 | } | |
1079 | } else | |
1080 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1081 | } |
1da177e4 | 1082 | |
69ee472f ON |
1083 | spin_lock_irqsave(&dev->txq.lock, flags); |
1084 | retval = usb_autopm_get_interface_async(dev->intf); | |
1085 | if (retval < 0) { | |
1086 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1087 | goto drop; | |
1088 | } | |
1089 | ||
1090 | #ifdef CONFIG_PM | |
1091 | /* if this triggers the device is still a sleep */ | |
1092 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1093 | /* transmission will be done in resume */ | |
1094 | usb_anchor_urb(urb, &dev->deferred); | |
1095 | /* no use to process more packets */ | |
1096 | netif_stop_queue(net); | |
1097 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
60b86755 | 1098 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1099 | goto deferred; |
1100 | } | |
1101 | #endif | |
1da177e4 | 1102 | |
1da177e4 LT |
1103 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1104 | case -EPIPE: | |
1105 | netif_stop_queue (net); | |
2e55cc72 | 1106 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1107 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1108 | break; |
1109 | default: | |
69ee472f | 1110 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1111 | netif_dbg(dev, tx_err, dev->net, |
1112 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1113 | break; |
1114 | case 0: | |
1115 | net->trans_start = jiffies; | |
1116 | __skb_queue_tail (&dev->txq, skb); | |
1117 | if (dev->txq.qlen >= TX_QLEN (dev)) | |
1118 | netif_stop_queue (net); | |
1119 | } | |
1120 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1121 | ||
1122 | if (retval) { | |
a475f603 | 1123 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1124 | drop: |
7963837f | 1125 | dev->net->stats.tx_dropped++; |
1da177e4 LT |
1126 | if (skb) |
1127 | dev_kfree_skb_any (skb); | |
1128 | usb_free_urb (urb); | |
a475f603 JP |
1129 | } else |
1130 | netif_dbg(dev, tx_queued, dev->net, | |
1131 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1132 | #ifdef CONFIG_PM |
1133 | deferred: | |
1134 | #endif | |
25a79c41 | 1135 | return NETDEV_TX_OK; |
1da177e4 | 1136 | } |
777baa47 | 1137 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 LT |
1138 | |
1139 | /*-------------------------------------------------------------------------*/ | |
1140 | ||
1141 | // tasklet (work deferred from completions, in_irq) or timer | |
1142 | ||
1143 | static void usbnet_bh (unsigned long param) | |
1144 | { | |
1145 | struct usbnet *dev = (struct usbnet *) param; | |
1146 | struct sk_buff *skb; | |
1147 | struct skb_data *entry; | |
1148 | ||
1149 | while ((skb = skb_dequeue (&dev->done))) { | |
1150 | entry = (struct skb_data *) skb->cb; | |
1151 | switch (entry->state) { | |
18ab458f | 1152 | case rx_done: |
1da177e4 LT |
1153 | entry->state = rx_cleanup; |
1154 | rx_process (dev, skb); | |
1155 | continue; | |
18ab458f DB |
1156 | case tx_done: |
1157 | case rx_cleanup: | |
1da177e4 LT |
1158 | usb_free_urb (entry->urb); |
1159 | dev_kfree_skb (skb); | |
1160 | continue; | |
18ab458f | 1161 | default: |
60b86755 | 1162 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1163 | } |
1164 | } | |
1165 | ||
1166 | // waiting for all pending urbs to complete? | |
1167 | if (dev->wait) { | |
1168 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1169 | wake_up (dev->wait); | |
1170 | } | |
1171 | ||
1172 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1173 | } else if (netif_running (dev->net) && |
1174 | netif_device_present (dev->net) && | |
1175 | !timer_pending (&dev->delay) && | |
1176 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
1177 | int temp = dev->rxq.qlen; |
1178 | int qlen = RX_QLEN (dev); | |
1179 | ||
1180 | if (temp < qlen) { | |
1181 | struct urb *urb; | |
1182 | int i; | |
1183 | ||
1184 | // don't refill the queue all at once | |
1185 | for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { | |
1186 | urb = usb_alloc_urb (0, GFP_ATOMIC); | |
1187 | if (urb != NULL) | |
1188 | rx_submit (dev, urb, GFP_ATOMIC); | |
1189 | } | |
a475f603 JP |
1190 | if (temp != dev->rxq.qlen) |
1191 | netif_dbg(dev, link, dev->net, | |
1192 | "rxqlen %d --> %d\n", | |
1193 | temp, dev->rxq.qlen); | |
1da177e4 LT |
1194 | if (dev->rxq.qlen < qlen) |
1195 | tasklet_schedule (&dev->bh); | |
1196 | } | |
1197 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1198 | netif_wake_queue (dev->net); | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | ||
1da177e4 LT |
1203 | /*------------------------------------------------------------------------- |
1204 | * | |
1205 | * USB Device Driver support | |
1206 | * | |
1207 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1208 | |
1da177e4 LT |
1209 | // precondition: never called in_interrupt |
1210 | ||
38bde1d4 | 1211 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1212 | { |
1213 | struct usbnet *dev; | |
1214 | struct usb_device *xdev; | |
1215 | struct net_device *net; | |
1216 | ||
1217 | dev = usb_get_intfdata(intf); | |
1218 | usb_set_intfdata(intf, NULL); | |
1219 | if (!dev) | |
1220 | return; | |
1221 | ||
1222 | xdev = interface_to_usbdev (intf); | |
1223 | ||
a475f603 JP |
1224 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1225 | intf->dev.driver->name, | |
1226 | xdev->bus->bus_name, xdev->devpath, | |
1227 | dev->driver_info->description); | |
cb1cebbe | 1228 | |
1da177e4 LT |
1229 | net = dev->net; |
1230 | unregister_netdev (net); | |
1231 | ||
1232 | /* we don't hold rtnl here ... */ | |
1233 | flush_scheduled_work (); | |
1234 | ||
1235 | if (dev->driver_info->unbind) | |
1236 | dev->driver_info->unbind (dev, intf); | |
1237 | ||
1238 | free_netdev(net); | |
1239 | usb_put_dev (xdev); | |
1240 | } | |
38bde1d4 | 1241 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1242 | |
777baa47 SH |
1243 | static const struct net_device_ops usbnet_netdev_ops = { |
1244 | .ndo_open = usbnet_open, | |
1245 | .ndo_stop = usbnet_stop, | |
1246 | .ndo_start_xmit = usbnet_start_xmit, | |
1247 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1248 | .ndo_change_mtu = usbnet_change_mtu, | |
1249 | .ndo_set_mac_address = eth_mac_addr, | |
1250 | .ndo_validate_addr = eth_validate_addr, | |
1251 | }; | |
1da177e4 LT |
1252 | |
1253 | /*-------------------------------------------------------------------------*/ | |
1254 | ||
1da177e4 LT |
1255 | // precondition: never called in_interrupt |
1256 | ||
225794f8 MH |
1257 | static struct device_type wlan_type = { |
1258 | .name = "wlan", | |
1259 | }; | |
1260 | ||
1261 | static struct device_type wwan_type = { | |
1262 | .name = "wwan", | |
1263 | }; | |
1264 | ||
38bde1d4 | 1265 | int |
1da177e4 LT |
1266 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1267 | { | |
1268 | struct usbnet *dev; | |
cb1cebbe | 1269 | struct net_device *net; |
1da177e4 LT |
1270 | struct usb_host_interface *interface; |
1271 | struct driver_info *info; | |
1272 | struct usb_device *xdev; | |
1273 | int status; | |
296c0242 | 1274 | const char *name; |
1da177e4 | 1275 | |
296c0242 | 1276 | name = udev->dev.driver->name; |
1da177e4 LT |
1277 | info = (struct driver_info *) prod->driver_info; |
1278 | if (!info) { | |
296c0242 | 1279 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1280 | return -ENODEV; |
1281 | } | |
1282 | xdev = interface_to_usbdev (udev); | |
1283 | interface = udev->cur_altsetting; | |
1284 | ||
1285 | usb_get_dev (xdev); | |
1286 | ||
1287 | status = -ENOMEM; | |
1288 | ||
1289 | // set up our own records | |
1290 | net = alloc_etherdev(sizeof(*dev)); | |
1291 | if (!net) { | |
1292 | dbg ("can't kmalloc dev"); | |
1293 | goto out; | |
1294 | } | |
1295 | ||
0dacca73 BH |
1296 | /* netdev_printk() needs this so do it as early as possible */ |
1297 | SET_NETDEV_DEV(net, &udev->dev); | |
1298 | ||
1da177e4 LT |
1299 | dev = netdev_priv(net); |
1300 | dev->udev = xdev; | |
a11a6544 | 1301 | dev->intf = udev; |
1da177e4 | 1302 | dev->driver_info = info; |
296c0242 | 1303 | dev->driver_name = name; |
1da177e4 LT |
1304 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1305 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1306 | skb_queue_head_init (&dev->rxq); | |
1307 | skb_queue_head_init (&dev->txq); | |
1308 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1309 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1310 | dev->bh.func = usbnet_bh; |
1311 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1312 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1313 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1314 | dev->delay.function = usbnet_bh; |
1315 | dev->delay.data = (unsigned long) dev; | |
1316 | init_timer (&dev->delay); | |
a9fc6338 | 1317 | mutex_init (&dev->phy_mutex); |
1da177e4 | 1318 | |
1da177e4 LT |
1319 | dev->net = net; |
1320 | strcpy (net->name, "usb%d"); | |
1321 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1322 | ||
2e55cc72 DB |
1323 | /* rx and tx sides can use different message sizes; |
1324 | * bind() should set rx_urb_size in that case. | |
1325 | */ | |
1326 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1327 | #if 0 |
1328 | // dma_supported() is deeply broken on almost all architectures | |
1329 | // possible with some EHCI controllers | |
6a35528a | 1330 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1331 | net->features |= NETIF_F_HIGHDMA; |
1332 | #endif | |
1333 | ||
777baa47 | 1334 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1335 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1336 | net->ethtool_ops = &usbnet_ethtool_ops; |
1337 | ||
1338 | // allow device-specific bind/init procedures | |
1339 | // NOTE net->name still not usable ... | |
1340 | if (info->bind) { | |
1341 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1342 | if (status < 0) |
1343 | goto out1; | |
1344 | ||
1da177e4 LT |
1345 | // heuristic: "usb%d" for links we know are two-host, |
1346 | // else "eth%d" when there's reasonable doubt. userspace | |
1347 | // can rename the link if it knows better. | |
8e95a202 JP |
1348 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
1349 | (net->dev_addr [0] & 0x02) == 0) | |
1da177e4 | 1350 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1351 | /* WLAN devices should always be named "wlan%d" */ |
1352 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1353 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1354 | /* WWAN devices should always be named "wwan%d" */ |
1355 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1356 | strcpy(net->name, "wwan%d"); | |
f29fc259 DB |
1357 | |
1358 | /* maybe the remote can't receive an Ethernet MTU */ | |
1359 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1360 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1361 | } else if (!info->in || !info->out) |
1362 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1363 | else { |
1364 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1365 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1366 | if (!(info->flags & FLAG_NO_SETINT)) | |
1367 | status = usb_set_interface (xdev, | |
1368 | interface->desc.bInterfaceNumber, | |
1369 | interface->desc.bAlternateSetting); | |
1370 | else | |
1371 | status = 0; | |
1372 | ||
1373 | } | |
9514bfe5 | 1374 | if (status >= 0 && dev->status) |
1da177e4 LT |
1375 | status = init_status (dev, udev); |
1376 | if (status < 0) | |
cb1cebbe | 1377 | goto out3; |
1da177e4 | 1378 | |
2e55cc72 DB |
1379 | if (!dev->rx_urb_size) |
1380 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1381 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1382 | |
225794f8 MH |
1383 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1384 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1385 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1386 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1387 | ||
1da177e4 LT |
1388 | status = register_netdev (net); |
1389 | if (status) | |
1390 | goto out3; | |
a475f603 JP |
1391 | netif_info(dev, probe, dev->net, |
1392 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1393 | udev->dev.driver->name, | |
1394 | xdev->bus->bus_name, xdev->devpath, | |
1395 | dev->driver_info->description, | |
1396 | net->dev_addr); | |
1da177e4 LT |
1397 | |
1398 | // ok, it's ready to go. | |
1399 | usb_set_intfdata (udev, dev); | |
1400 | ||
1da177e4 LT |
1401 | netif_device_attach (net); |
1402 | ||
37e8273c BH |
1403 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
1404 | netif_carrier_off(net); | |
1405 | ||
1da177e4 LT |
1406 | return 0; |
1407 | ||
1408 | out3: | |
1409 | if (info->unbind) | |
1410 | info->unbind (dev, udev); | |
1411 | out1: | |
1412 | free_netdev(net); | |
1413 | out: | |
1414 | usb_put_dev(xdev); | |
1415 | return status; | |
1416 | } | |
38bde1d4 | 1417 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1418 | |
1419 | /*-------------------------------------------------------------------------*/ | |
1420 | ||
36433127 ON |
1421 | /* |
1422 | * suspend the whole driver as soon as the first interface is suspended | |
1423 | * resume only when the last interface is resumed | |
38bde1d4 | 1424 | */ |
1da177e4 | 1425 | |
38bde1d4 | 1426 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1427 | { |
1428 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1429 | |
36433127 | 1430 | if (!dev->suspend_count++) { |
69ee472f ON |
1431 | spin_lock_irq(&dev->txq.lock); |
1432 | /* don't autosuspend while transmitting */ | |
1433 | if (dev->txq.qlen && (message.event & PM_EVENT_AUTO)) { | |
1434 | spin_unlock_irq(&dev->txq.lock); | |
1435 | return -EBUSY; | |
1436 | } else { | |
1437 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1438 | spin_unlock_irq(&dev->txq.lock); | |
1439 | } | |
a11a6544 ON |
1440 | /* |
1441 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1442 | * having everything error out. |
1443 | */ | |
1444 | netif_device_detach (dev->net); | |
69ee472f ON |
1445 | usbnet_terminate_urbs(dev); |
1446 | usb_kill_urb(dev->interrupt); | |
1447 | ||
a11a6544 ON |
1448 | /* |
1449 | * reattach so runtime management can use and | |
1450 | * wake the device | |
1451 | */ | |
1452 | netif_device_attach (dev->net); | |
36433127 | 1453 | } |
1da177e4 LT |
1454 | return 0; |
1455 | } | |
38bde1d4 | 1456 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1457 | |
38bde1d4 | 1458 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1459 | { |
1460 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1461 | struct sk_buff *skb; |
1462 | struct urb *res; | |
1463 | int retval; | |
1464 | ||
1465 | if (!--dev->suspend_count) { | |
1466 | spin_lock_irq(&dev->txq.lock); | |
1467 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1468 | ||
1469 | printk(KERN_INFO"%s has delayed data\n", __func__); | |
1470 | skb = (struct sk_buff *)res->context; | |
1471 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1472 | if (retval < 0) { | |
1473 | dev_kfree_skb_any(skb); | |
1474 | usb_free_urb(res); | |
1475 | usb_autopm_put_interface_async(dev->intf); | |
1476 | } else { | |
1477 | dev->net->trans_start = jiffies; | |
1478 | __skb_queue_tail(&dev->txq, skb); | |
1479 | } | |
1480 | } | |
1da177e4 | 1481 | |
69ee472f ON |
1482 | smp_mb(); |
1483 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1484 | spin_unlock_irq(&dev->txq.lock); | |
1485 | if (!(dev->txq.qlen >= TX_QLEN(dev))) | |
1486 | netif_start_queue(dev->net); | |
36433127 | 1487 | tasklet_schedule (&dev->bh); |
69ee472f | 1488 | } |
1da177e4 LT |
1489 | return 0; |
1490 | } | |
38bde1d4 | 1491 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1492 | |
1da177e4 | 1493 | |
1da177e4 LT |
1494 | /*-------------------------------------------------------------------------*/ |
1495 | ||
f29fc259 | 1496 | static int __init usbnet_init(void) |
1da177e4 | 1497 | { |
090ffa9d | 1498 | /* compiler should optimize this out */ |
f8ac232a | 1499 | BUILD_BUG_ON (sizeof (((struct sk_buff *)0)->cb) |
1da177e4 | 1500 | < sizeof (struct skb_data)); |
1da177e4 LT |
1501 | |
1502 | random_ether_addr(node_id); | |
cb1cebbe | 1503 | return 0; |
1da177e4 | 1504 | } |
f29fc259 | 1505 | module_init(usbnet_init); |
1da177e4 | 1506 | |
f29fc259 | 1507 | static void __exit usbnet_exit(void) |
1da177e4 | 1508 | { |
1da177e4 | 1509 | } |
f29fc259 | 1510 | module_exit(usbnet_exit); |
1da177e4 | 1511 | |
f29fc259 | 1512 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1513 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1514 | MODULE_LICENSE("GPL"); |