Commit | Line | Data |
---|---|---|
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> |
fd1f170d | 47 | #include <linux/kernel.h> |
f29fc259 DB |
48 | |
49 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
50 | |
51 | ||
52 | /*-------------------------------------------------------------------------*/ | |
53 | ||
54 | /* | |
55 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
56 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
57 | * One maximum size Ethernet packet takes twenty four of them. | |
58 | * For high speed, each frame comfortably fits almost 36 max size | |
59 | * Ethernet packets (so queues should be bigger). | |
f29fc259 DB |
60 | * |
61 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to | |
62 | * let the USB host controller be busy for 5msec or more before an irq | |
63 | * is required, under load. Jumbograms change the equation. | |
1da177e4 | 64 | */ |
a99c1949 JP |
65 | #define RX_MAX_QUEUE_MEMORY (60 * 1518) |
66 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
67 | (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4) | |
68 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
69 | (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4) | |
1da177e4 | 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: | |
fc6e2544 | 120 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
121 | continue; |
122 | intr = 1; | |
123 | /* FALLTHROUGH */ | |
124 | case USB_ENDPOINT_XFER_BULK: | |
125 | break; | |
126 | default: | |
127 | continue; | |
128 | } | |
fc6e2544 | 129 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
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 | ||
8e95a202 JP |
145 | if (alt->desc.bAlternateSetting != 0 || |
146 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
147 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
148 | alt->desc.bAlternateSetting); | |
149 | if (tmp < 0) | |
150 | return tmp; | |
151 | } | |
cb1cebbe | 152 | |
1da177e4 LT |
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 | 161 | |
03ad032b PH |
162 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
163 | { | |
164 | int tmp, i; | |
165 | unsigned char buf [13]; | |
166 | ||
167 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); | |
168 | if (tmp != 12) { | |
169 | dev_dbg(&dev->udev->dev, | |
170 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
171 | if (tmp >= 0) | |
172 | tmp = -EINVAL; | |
173 | return tmp; | |
174 | } | |
175 | for (i = tmp = 0; i < 6; i++, tmp += 2) | |
176 | dev->net->dev_addr [i] = | |
fd1f170d | 177 | (hex_to_bin(buf[tmp]) << 4) + hex_to_bin(buf[tmp + 1]); |
03ad032b PH |
178 | return 0; |
179 | } | |
180 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
181 | ||
7d12e780 | 182 | static void intr_complete (struct urb *urb); |
1da177e4 LT |
183 | |
184 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
185 | { | |
186 | char *buf = NULL; | |
187 | unsigned pipe = 0; | |
188 | unsigned maxp; | |
189 | unsigned period; | |
190 | ||
191 | if (!dev->driver_info->status) | |
192 | return 0; | |
193 | ||
194 | pipe = usb_rcvintpipe (dev->udev, | |
195 | dev->status->desc.bEndpointAddress | |
196 | & USB_ENDPOINT_NUMBER_MASK); | |
197 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
198 | ||
199 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
200 | period = max ((int) dev->status->desc.bInterval, | |
201 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
202 | ||
e94b1766 | 203 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 204 | if (buf) { |
e94b1766 | 205 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
206 | if (!dev->interrupt) { |
207 | kfree (buf); | |
208 | return -ENOMEM; | |
209 | } else { | |
210 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
211 | buf, maxp, intr_complete, dev, period); | |
212 | dev_dbg(&intf->dev, | |
213 | "status ep%din, %d bytes period %d\n", | |
214 | usb_pipeendpoint(pipe), maxp, period); | |
215 | } | |
216 | } | |
18ab458f | 217 | return 0; |
1da177e4 LT |
218 | } |
219 | ||
2e55cc72 DB |
220 | /* Passes this packet up the stack, updating its accounting. |
221 | * Some link protocols batch packets, so their rx_fixup paths | |
222 | * can return clones as well as just modify the original skb. | |
223 | */ | |
224 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
225 | { |
226 | int status; | |
227 | ||
7834ddbc JK |
228 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
229 | skb_queue_tail(&dev->rxq_pause, skb); | |
230 | return; | |
231 | } | |
232 | ||
1da177e4 | 233 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
234 | dev->net->stats.rx_packets++; |
235 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 236 | |
a475f603 JP |
237 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
238 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 LT |
239 | memset (skb->cb, 0, sizeof (struct skb_data)); |
240 | status = netif_rx (skb); | |
a475f603 JP |
241 | if (status != NET_RX_SUCCESS) |
242 | netif_dbg(dev, rx_err, dev->net, | |
243 | "netif_rx status %d\n", status); | |
1da177e4 | 244 | } |
2e55cc72 | 245 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 246 | |
1da177e4 LT |
247 | \f |
248 | /*------------------------------------------------------------------------- | |
249 | * | |
250 | * Network Device Driver (peer link to "Host Device", from USB host) | |
251 | * | |
252 | *-------------------------------------------------------------------------*/ | |
253 | ||
777baa47 | 254 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
255 | { |
256 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 257 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
258 | int old_hard_mtu = dev->hard_mtu; |
259 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 260 | |
a99c1949 | 261 | if (new_mtu <= 0) |
1da177e4 | 262 | return -EINVAL; |
1da177e4 | 263 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 264 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
265 | return -EDOM; |
266 | net->mtu = new_mtu; | |
a99c1949 JP |
267 | |
268 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
269 | if (dev->rx_urb_size == old_hard_mtu) { | |
270 | dev->rx_urb_size = dev->hard_mtu; | |
271 | if (dev->rx_urb_size > old_rx_urb_size) | |
272 | usbnet_unlink_rx_urbs(dev); | |
273 | } | |
274 | ||
1da177e4 LT |
275 | return 0; |
276 | } | |
777baa47 | 277 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 LT |
278 | |
279 | /*-------------------------------------------------------------------------*/ | |
280 | ||
1da177e4 LT |
281 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
282 | * completion callbacks. 2.5 should have fixed those bugs... | |
283 | */ | |
284 | ||
8728b834 | 285 | static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list) |
1da177e4 | 286 | { |
1da177e4 LT |
287 | unsigned long flags; |
288 | ||
8728b834 DM |
289 | spin_lock_irqsave(&list->lock, flags); |
290 | __skb_unlink(skb, list); | |
291 | spin_unlock(&list->lock); | |
292 | spin_lock(&dev->done.lock); | |
293 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 294 | if (dev->done.qlen == 1) |
8728b834 DM |
295 | tasklet_schedule(&dev->bh); |
296 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
1da177e4 LT |
297 | } |
298 | ||
299 | /* some work can't be done in tasklets, so we use keventd | |
300 | * | |
301 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
302 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
303 | */ | |
2e55cc72 | 304 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
305 | { |
306 | set_bit (work, &dev->flags); | |
307 | if (!schedule_work (&dev->kevent)) | |
60b86755 | 308 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); |
1da177e4 | 309 | else |
60b86755 | 310 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
1da177e4 | 311 | } |
2e55cc72 | 312 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
313 | |
314 | /*-------------------------------------------------------------------------*/ | |
315 | ||
7d12e780 | 316 | static void rx_complete (struct urb *urb); |
1da177e4 | 317 | |
dacb3975 | 318 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
319 | { |
320 | struct sk_buff *skb; | |
321 | struct skb_data *entry; | |
322 | int retval = 0; | |
323 | unsigned long lockflags; | |
2e55cc72 | 324 | size_t size = dev->rx_urb_size; |
1da177e4 | 325 | |
1da177e4 | 326 | if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) { |
a475f603 | 327 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 328 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 329 | usb_free_urb (urb); |
dacb3975 | 330 | return -ENOMEM; |
1da177e4 LT |
331 | } |
332 | skb_reserve (skb, NET_IP_ALIGN); | |
333 | ||
334 | entry = (struct skb_data *) skb->cb; | |
335 | entry->urb = urb; | |
336 | entry->dev = dev; | |
337 | entry->state = rx_start; | |
338 | entry->length = 0; | |
339 | ||
340 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
341 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
342 | |
343 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
344 | ||
8e95a202 JP |
345 | if (netif_running (dev->net) && |
346 | netif_device_present (dev->net) && | |
69ee472f ON |
347 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
348 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 349 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 350 | case -EPIPE: |
2e55cc72 | 351 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
352 | break; |
353 | case -ENOMEM: | |
2e55cc72 | 354 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
355 | break; |
356 | case -ENODEV: | |
a475f603 | 357 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
358 | netif_device_detach (dev->net); |
359 | break; | |
dacb3975 DM |
360 | case -EHOSTUNREACH: |
361 | retval = -ENOLINK; | |
362 | break; | |
1da177e4 | 363 | default: |
a475f603 JP |
364 | netif_dbg(dev, rx_err, dev->net, |
365 | "rx submit, %d\n", retval); | |
1da177e4 LT |
366 | tasklet_schedule (&dev->bh); |
367 | break; | |
368 | case 0: | |
369 | __skb_queue_tail (&dev->rxq, skb); | |
370 | } | |
371 | } else { | |
a475f603 | 372 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
373 | retval = -ENOLINK; |
374 | } | |
375 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
376 | if (retval) { | |
377 | dev_kfree_skb_any (skb); | |
378 | usb_free_urb (urb); | |
379 | } | |
dacb3975 | 380 | return retval; |
1da177e4 LT |
381 | } |
382 | ||
383 | ||
384 | /*-------------------------------------------------------------------------*/ | |
385 | ||
386 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
387 | { | |
8e95a202 JP |
388 | if (dev->driver_info->rx_fixup && |
389 | !dev->driver_info->rx_fixup (dev, skb)) | |
1da177e4 LT |
390 | goto error; |
391 | // else network stack removes extra byte if we forced a short packet | |
392 | ||
393 | if (skb->len) | |
2e55cc72 | 394 | usbnet_skb_return (dev, skb); |
1da177e4 | 395 | else { |
a475f603 | 396 | netif_dbg(dev, rx_err, dev->net, "drop\n"); |
1da177e4 | 397 | error: |
7963837f | 398 | dev->net->stats.rx_errors++; |
1da177e4 LT |
399 | skb_queue_tail (&dev->done, skb); |
400 | } | |
401 | } | |
402 | ||
403 | /*-------------------------------------------------------------------------*/ | |
404 | ||
7d12e780 | 405 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
406 | { |
407 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
408 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
409 | struct usbnet *dev = entry->dev; | |
410 | int urb_status = urb->status; | |
411 | ||
412 | skb_put (skb, urb->actual_length); | |
413 | entry->state = rx_done; | |
414 | entry->urb = NULL; | |
415 | ||
416 | switch (urb_status) { | |
18ab458f DB |
417 | /* success */ |
418 | case 0: | |
f29fc259 | 419 | if (skb->len < dev->net->hard_header_len) { |
1da177e4 | 420 | entry->state = rx_cleanup; |
7963837f HX |
421 | dev->net->stats.rx_errors++; |
422 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
423 | netif_dbg(dev, rx_err, dev->net, |
424 | "rx length %d\n", skb->len); | |
1da177e4 LT |
425 | } |
426 | break; | |
427 | ||
18ab458f DB |
428 | /* stalls need manual reset. this is rare ... except that |
429 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 430 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
431 | * storm, recovering as needed. |
432 | */ | |
433 | case -EPIPE: | |
7963837f | 434 | dev->net->stats.rx_errors++; |
2e55cc72 | 435 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
436 | // FALLTHROUGH |
437 | ||
18ab458f DB |
438 | /* software-driven interface shutdown */ |
439 | case -ECONNRESET: /* async unlink */ | |
440 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
441 | netif_dbg(dev, ifdown, dev->net, |
442 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
443 | goto block; |
444 | ||
18ab458f DB |
445 | /* we get controller i/o faults during khubd disconnect() delays. |
446 | * throttle down resubmits, to avoid log floods; just temporarily, | |
447 | * so we still recover when the fault isn't a khubd delay. | |
448 | */ | |
449 | case -EPROTO: | |
450 | case -ETIME: | |
451 | case -EILSEQ: | |
7963837f | 452 | dev->net->stats.rx_errors++; |
1da177e4 LT |
453 | if (!timer_pending (&dev->delay)) { |
454 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
455 | netif_dbg(dev, link, dev->net, |
456 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
457 | } |
458 | block: | |
459 | entry->state = rx_cleanup; | |
460 | entry->urb = urb; | |
461 | urb = NULL; | |
462 | break; | |
463 | ||
18ab458f DB |
464 | /* data overrun ... flush fifo? */ |
465 | case -EOVERFLOW: | |
7963837f | 466 | dev->net->stats.rx_over_errors++; |
1da177e4 | 467 | // FALLTHROUGH |
cb1cebbe | 468 | |
18ab458f | 469 | default: |
1da177e4 | 470 | entry->state = rx_cleanup; |
7963837f | 471 | dev->net->stats.rx_errors++; |
a475f603 | 472 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
473 | break; |
474 | } | |
475 | ||
8728b834 | 476 | defer_bh(dev, skb, &dev->rxq); |
1da177e4 LT |
477 | |
478 | if (urb) { | |
8e95a202 JP |
479 | if (netif_running (dev->net) && |
480 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
481 | rx_submit (dev, urb, GFP_ATOMIC); |
482 | return; | |
483 | } | |
484 | usb_free_urb (urb); | |
485 | } | |
a475f603 | 486 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
487 | } |
488 | ||
7d12e780 | 489 | static void intr_complete (struct urb *urb) |
1da177e4 LT |
490 | { |
491 | struct usbnet *dev = urb->context; | |
492 | int status = urb->status; | |
493 | ||
494 | switch (status) { | |
18ab458f DB |
495 | /* success */ |
496 | case 0: | |
1da177e4 LT |
497 | dev->driver_info->status(dev, urb); |
498 | break; | |
499 | ||
18ab458f DB |
500 | /* software-driven interface shutdown */ |
501 | case -ENOENT: /* urb killed */ | |
502 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
503 | netif_dbg(dev, ifdown, dev->net, |
504 | "intr shutdown, code %d\n", status); | |
1da177e4 LT |
505 | return; |
506 | ||
18ab458f DB |
507 | /* NOTE: not throttling like RX/TX, since this endpoint |
508 | * already polls infrequently | |
509 | */ | |
510 | default: | |
60b86755 | 511 | netdev_dbg(dev->net, "intr status %d\n", status); |
1da177e4 LT |
512 | break; |
513 | } | |
514 | ||
515 | if (!netif_running (dev->net)) | |
516 | return; | |
517 | ||
518 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
519 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
a475f603 JP |
520 | if (status != 0) |
521 | netif_err(dev, timer, dev->net, | |
522 | "intr resubmit --> %d\n", status); | |
1da177e4 LT |
523 | } |
524 | ||
7834ddbc JK |
525 | /*-------------------------------------------------------------------------*/ |
526 | void usbnet_pause_rx(struct usbnet *dev) | |
527 | { | |
528 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
529 | ||
a475f603 | 530 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
531 | } |
532 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
533 | ||
534 | void usbnet_resume_rx(struct usbnet *dev) | |
535 | { | |
536 | struct sk_buff *skb; | |
537 | int num = 0; | |
538 | ||
539 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
540 | ||
541 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
542 | usbnet_skb_return(dev, skb); | |
543 | num++; | |
544 | } | |
545 | ||
546 | tasklet_schedule(&dev->bh); | |
547 | ||
a475f603 JP |
548 | netif_dbg(dev, rx_status, dev->net, |
549 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
550 | } |
551 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
552 | ||
553 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
554 | { | |
555 | skb_queue_purge(&dev->rxq_pause); | |
556 | } | |
557 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
558 | ||
1da177e4 LT |
559 | /*-------------------------------------------------------------------------*/ |
560 | ||
561 | // unlink pending rx/tx; completion handlers do all other cleanup | |
562 | ||
563 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
564 | { | |
565 | unsigned long flags; | |
566 | struct sk_buff *skb, *skbnext; | |
567 | int count = 0; | |
568 | ||
569 | spin_lock_irqsave (&q->lock, flags); | |
83bfba5f | 570 | skb_queue_walk_safe(q, skb, skbnext) { |
1da177e4 LT |
571 | struct skb_data *entry; |
572 | struct urb *urb; | |
573 | int retval; | |
574 | ||
575 | entry = (struct skb_data *) skb->cb; | |
576 | urb = entry->urb; | |
1da177e4 LT |
577 | |
578 | // during some PM-driven resume scenarios, | |
579 | // these (async) unlinks complete immediately | |
580 | retval = usb_unlink_urb (urb); | |
581 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 582 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
583 | else |
584 | count++; | |
585 | } | |
586 | spin_unlock_irqrestore (&q->lock, flags); | |
587 | return count; | |
588 | } | |
589 | ||
a99c1949 JP |
590 | // Flush all pending rx urbs |
591 | // minidrivers may need to do this when the MTU changes | |
592 | ||
593 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
594 | { | |
595 | if (netif_running(dev->net)) { | |
596 | (void) unlink_urbs (dev, &dev->rxq); | |
597 | tasklet_schedule(&dev->bh); | |
598 | } | |
599 | } | |
600 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
601 | |
602 | /*-------------------------------------------------------------------------*/ | |
603 | ||
604 | // precondition: never called in_interrupt | |
69ee472f ON |
605 | static void usbnet_terminate_urbs(struct usbnet *dev) |
606 | { | |
607 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
608 | DECLARE_WAITQUEUE(wait, current); | |
609 | int temp; | |
610 | ||
611 | /* ensure there are no more active urbs */ | |
612 | add_wait_queue(&unlink_wakeup, &wait); | |
613 | set_current_state(TASK_UNINTERRUPTIBLE); | |
614 | dev->wait = &unlink_wakeup; | |
615 | temp = unlink_urbs(dev, &dev->txq) + | |
616 | unlink_urbs(dev, &dev->rxq); | |
617 | ||
618 | /* maybe wait for deletions to finish. */ | |
619 | while (!skb_queue_empty(&dev->rxq) | |
620 | && !skb_queue_empty(&dev->txq) | |
621 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 622 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 623 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
624 | netif_dbg(dev, ifdown, dev->net, |
625 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
626 | } |
627 | set_current_state(TASK_RUNNING); | |
628 | dev->wait = NULL; | |
629 | remove_wait_queue(&unlink_wakeup, &wait); | |
630 | } | |
1da177e4 | 631 | |
777baa47 | 632 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
633 | { |
634 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 635 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 636 | int retval; |
1da177e4 LT |
637 | |
638 | netif_stop_queue (net); | |
639 | ||
a475f603 | 640 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 641 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
642 | net->stats.rx_packets, net->stats.tx_packets, |
643 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 644 | |
a33e9e7f JK |
645 | /* allow minidriver to stop correctly (wireless devices to turn off |
646 | * radio etc) */ | |
647 | if (info->stop) { | |
648 | retval = info->stop(dev); | |
a475f603 JP |
649 | if (retval < 0) |
650 | netif_info(dev, ifdown, dev->net, | |
651 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
652 | retval, | |
653 | dev->udev->bus->bus_name, dev->udev->devpath, | |
654 | info->description); | |
a33e9e7f JK |
655 | } |
656 | ||
69ee472f ON |
657 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
658 | usbnet_terminate_urbs(dev); | |
1da177e4 LT |
659 | |
660 | usb_kill_urb(dev->interrupt); | |
661 | ||
7834ddbc JK |
662 | usbnet_purge_paused_rxq(dev); |
663 | ||
1da177e4 LT |
664 | /* deferred work (task, timer, softirq) must also stop. |
665 | * can't flush_scheduled_work() until we drop rtnl (later), | |
666 | * else workers could deadlock; so make workers a NOP. | |
667 | */ | |
668 | dev->flags = 0; | |
669 | del_timer_sync (&dev->delay); | |
670 | tasklet_kill (&dev->bh); | |
69ee472f ON |
671 | if (info->manage_power) |
672 | info->manage_power(dev, 0); | |
673 | else | |
674 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
675 | |
676 | return 0; | |
677 | } | |
777baa47 | 678 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
679 | |
680 | /*-------------------------------------------------------------------------*/ | |
681 | ||
682 | // posts reads, and enables write queuing | |
683 | ||
684 | // precondition: never called in_interrupt | |
685 | ||
777baa47 | 686 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
687 | { |
688 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 689 | int retval; |
1da177e4 LT |
690 | struct driver_info *info = dev->driver_info; |
691 | ||
a11a6544 | 692 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
693 | netif_info(dev, ifup, dev->net, |
694 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
695 | retval, | |
696 | dev->udev->bus->bus_name, | |
697 | dev->udev->devpath, | |
698 | info->description); | |
a11a6544 ON |
699 | goto done_nopm; |
700 | } | |
701 | ||
1da177e4 LT |
702 | // put into "known safe" state |
703 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
704 | netif_info(dev, ifup, dev->net, |
705 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
706 | retval, | |
707 | dev->udev->bus->bus_name, | |
708 | dev->udev->devpath, | |
709 | info->description); | |
1da177e4 LT |
710 | goto done; |
711 | } | |
712 | ||
713 | // insist peer be connected | |
714 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 715 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
716 | goto done; |
717 | } | |
718 | ||
719 | /* start any status interrupt transfer */ | |
720 | if (dev->interrupt) { | |
721 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
722 | if (retval < 0) { | |
a475f603 JP |
723 | netif_err(dev, ifup, dev->net, |
724 | "intr submit %d\n", retval); | |
1da177e4 LT |
725 | goto done; |
726 | } | |
727 | } | |
728 | ||
729 | netif_start_queue (net); | |
a475f603 JP |
730 | netif_info(dev, ifup, dev->net, |
731 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
732 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
733 | dev->net->mtu, | |
734 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
735 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
736 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
737 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
738 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
739 | "simple"); | |
1da177e4 LT |
740 | |
741 | // delay posting reads until we're fully open | |
742 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
743 | if (info->manage_power) { |
744 | retval = info->manage_power(dev, 1); | |
745 | if (retval < 0) | |
746 | goto done; | |
747 | usb_autopm_put_interface(dev->intf); | |
748 | } | |
a11a6544 | 749 | return retval; |
a475f603 | 750 | |
1da177e4 | 751 | done: |
a11a6544 ON |
752 | usb_autopm_put_interface(dev->intf); |
753 | done_nopm: | |
1da177e4 LT |
754 | return retval; |
755 | } | |
777baa47 | 756 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
757 | |
758 | /*-------------------------------------------------------------------------*/ | |
759 | ||
2e55cc72 DB |
760 | /* ethtool methods; minidrivers may need to add some more, but |
761 | * they'll probably want to use this base set. | |
762 | */ | |
763 | ||
c41286fd AB |
764 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
765 | { | |
766 | struct usbnet *dev = netdev_priv(net); | |
767 | ||
768 | if (!dev->mii.mdio_read) | |
769 | return -EOPNOTSUPP; | |
770 | ||
771 | return mii_ethtool_gset(&dev->mii, cmd); | |
772 | } | |
773 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
774 | ||
775 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
776 | { | |
777 | struct usbnet *dev = netdev_priv(net); | |
778 | int retval; | |
779 | ||
780 | if (!dev->mii.mdio_write) | |
781 | return -EOPNOTSUPP; | |
782 | ||
783 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
784 | ||
785 | /* link speed/duplex might have changed */ | |
786 | if (dev->driver_info->link_reset) | |
787 | dev->driver_info->link_reset(dev); | |
788 | ||
789 | return retval; | |
790 | ||
791 | } | |
792 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
793 | ||
c41286fd | 794 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
795 | { |
796 | struct usbnet *dev = netdev_priv(net); | |
797 | ||
f29fc259 | 798 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
799 | if (dev->driver_info->check_connect) |
800 | return dev->driver_info->check_connect (dev) == 0; | |
801 | ||
c41286fd AB |
802 | /* if the device has mii operations, use those */ |
803 | if (dev->mii.mdio_read) | |
804 | return mii_link_ok(&dev->mii); | |
805 | ||
05ffb3e2 BM |
806 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
807 | return ethtool_op_get_link(net); | |
1da177e4 | 808 | } |
c41286fd | 809 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 810 | |
18ee91fa | 811 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
812 | { |
813 | struct usbnet *dev = netdev_priv(net); | |
814 | ||
18ee91fa DB |
815 | if (!dev->mii.mdio_write) |
816 | return -EOPNOTSUPP; | |
817 | ||
818 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 819 | } |
18ee91fa | 820 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 821 | |
18ee91fa | 822 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
823 | { |
824 | struct usbnet *dev = netdev_priv(net); | |
825 | ||
296c0242 | 826 | strncpy (info->driver, dev->driver_name, sizeof info->driver); |
18ee91fa DB |
827 | strncpy (info->version, DRIVER_VERSION, sizeof info->version); |
828 | strncpy (info->fw_version, dev->driver_info->description, | |
829 | sizeof info->fw_version); | |
830 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 831 | } |
18ee91fa | 832 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 833 | |
18ee91fa | 834 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
835 | { |
836 | struct usbnet *dev = netdev_priv(net); | |
837 | ||
18ee91fa DB |
838 | return dev->msg_enable; |
839 | } | |
840 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 841 | |
18ee91fa DB |
842 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
843 | { | |
844 | struct usbnet *dev = netdev_priv(net); | |
845 | ||
846 | dev->msg_enable = level; | |
c41286fd | 847 | } |
18ee91fa | 848 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 849 | |
2e55cc72 | 850 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 851 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
852 | .get_settings = usbnet_get_settings, |
853 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 854 | .get_link = usbnet_get_link, |
c41286fd | 855 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 856 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
857 | .get_msglevel = usbnet_get_msglevel, |
858 | .set_msglevel = usbnet_set_msglevel, | |
859 | }; | |
1da177e4 LT |
860 | |
861 | /*-------------------------------------------------------------------------*/ | |
862 | ||
863 | /* work that cannot be done in interrupt context uses keventd. | |
864 | * | |
865 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
866 | * especially now that control transfers can be queued. | |
867 | */ | |
868 | static void | |
c4028958 | 869 | kevent (struct work_struct *work) |
1da177e4 | 870 | { |
c4028958 DH |
871 | struct usbnet *dev = |
872 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
873 | int status; |
874 | ||
875 | /* usb_clear_halt() needs a thread context */ | |
876 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
877 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
878 | status = usb_autopm_get_interface(dev->intf); |
879 | if (status < 0) | |
880 | goto fail_pipe; | |
1da177e4 | 881 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 882 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
883 | if (status < 0 && |
884 | status != -EPIPE && | |
885 | status != -ESHUTDOWN) { | |
1da177e4 | 886 | if (netif_msg_tx_err (dev)) |
69ee472f | 887 | fail_pipe: |
60b86755 JP |
888 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
889 | status); | |
1da177e4 LT |
890 | } else { |
891 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
892 | if (status != -ESHUTDOWN) |
893 | netif_wake_queue (dev->net); | |
1da177e4 LT |
894 | } |
895 | } | |
896 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
897 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
898 | status = usb_autopm_get_interface(dev->intf); |
899 | if (status < 0) | |
900 | goto fail_halt; | |
1da177e4 | 901 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 902 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
903 | if (status < 0 && |
904 | status != -EPIPE && | |
905 | status != -ESHUTDOWN) { | |
1da177e4 | 906 | if (netif_msg_rx_err (dev)) |
69ee472f | 907 | fail_halt: |
60b86755 JP |
908 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
909 | status); | |
1da177e4 LT |
910 | } else { |
911 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
912 | tasklet_schedule (&dev->bh); | |
913 | } | |
914 | } | |
915 | ||
916 | /* tasklet could resubmit itself forever if memory is tight */ | |
917 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
918 | struct urb *urb = NULL; | |
dacb3975 | 919 | int resched = 1; |
1da177e4 LT |
920 | |
921 | if (netif_running (dev->net)) | |
922 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
923 | else | |
924 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
925 | if (urb != NULL) { | |
926 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f ON |
927 | status = usb_autopm_get_interface(dev->intf); |
928 | if (status < 0) | |
929 | goto fail_lowmem; | |
dacb3975 DM |
930 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
931 | resched = 0; | |
69ee472f ON |
932 | usb_autopm_put_interface(dev->intf); |
933 | fail_lowmem: | |
dacb3975 DM |
934 | if (resched) |
935 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
936 | } |
937 | } | |
938 | ||
7ea13c9c | 939 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 940 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
941 | int retval = 0; |
942 | ||
943 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
944 | status = usb_autopm_get_interface(dev->intf); |
945 | if (status < 0) | |
946 | goto skip_reset; | |
7ea13c9c | 947 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
948 | usb_autopm_put_interface(dev->intf); |
949 | skip_reset: | |
60b86755 JP |
950 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
951 | retval, | |
952 | dev->udev->bus->bus_name, | |
953 | dev->udev->devpath, | |
954 | info->description); | |
69ee472f ON |
955 | } else { |
956 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c DH |
957 | } |
958 | } | |
959 | ||
1da177e4 | 960 | if (dev->flags) |
60b86755 | 961 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
962 | } |
963 | ||
964 | /*-------------------------------------------------------------------------*/ | |
965 | ||
7d12e780 | 966 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
967 | { |
968 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
969 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
970 | struct usbnet *dev = entry->dev; | |
971 | ||
972 | if (urb->status == 0) { | |
7963837f HX |
973 | dev->net->stats.tx_packets++; |
974 | dev->net->stats.tx_bytes += entry->length; | |
1da177e4 | 975 | } else { |
7963837f | 976 | dev->net->stats.tx_errors++; |
1da177e4 LT |
977 | |
978 | switch (urb->status) { | |
979 | case -EPIPE: | |
2e55cc72 | 980 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
981 | break; |
982 | ||
983 | /* software-driven interface shutdown */ | |
984 | case -ECONNRESET: // async unlink | |
985 | case -ESHUTDOWN: // hardware gone | |
986 | break; | |
987 | ||
988 | // like rx, tx gets controller i/o faults during khubd delays | |
989 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
990 | case -EPROTO: |
991 | case -ETIME: | |
992 | case -EILSEQ: | |
69ee472f | 993 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
994 | if (!timer_pending (&dev->delay)) { |
995 | mod_timer (&dev->delay, | |
996 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
997 | netif_dbg(dev, link, dev->net, |
998 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
999 | } |
1000 | netif_stop_queue (dev->net); | |
1001 | break; | |
1002 | default: | |
a475f603 JP |
1003 | netif_dbg(dev, tx_err, dev->net, |
1004 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1005 | break; |
1006 | } | |
1007 | } | |
1008 | ||
69ee472f | 1009 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1010 | urb->dev = NULL; |
1011 | entry->state = tx_done; | |
8728b834 | 1012 | defer_bh(dev, skb, &dev->txq); |
1da177e4 LT |
1013 | } |
1014 | ||
1015 | /*-------------------------------------------------------------------------*/ | |
1016 | ||
777baa47 | 1017 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1018 | { |
1019 | struct usbnet *dev = netdev_priv(net); | |
1020 | ||
1021 | unlink_urbs (dev, &dev->txq); | |
1022 | tasklet_schedule (&dev->bh); | |
1023 | ||
1024 | // FIXME: device recovery -- reset? | |
1025 | } | |
777baa47 | 1026 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1027 | |
1028 | /*-------------------------------------------------------------------------*/ | |
1029 | ||
25a79c41 SH |
1030 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1031 | struct net_device *net) | |
1da177e4 LT |
1032 | { |
1033 | struct usbnet *dev = netdev_priv(net); | |
1034 | int length; | |
1da177e4 LT |
1035 | struct urb *urb = NULL; |
1036 | struct skb_data *entry; | |
1037 | struct driver_info *info = dev->driver_info; | |
1038 | unsigned long flags; | |
25a79c41 | 1039 | int retval; |
1da177e4 LT |
1040 | |
1041 | // some devices want funky USB-level framing, for | |
1042 | // win32 driver (usually) and/or hardware quirks | |
1043 | if (info->tx_fixup) { | |
1044 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1045 | if (!skb) { | |
a475f603 | 1046 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1da177e4 LT |
1047 | goto drop; |
1048 | } | |
1049 | } | |
1050 | length = skb->len; | |
1051 | ||
1052 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1053 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1054 | goto drop; |
1055 | } | |
1056 | ||
1057 | entry = (struct skb_data *) skb->cb; | |
1058 | entry->urb = urb; | |
1059 | entry->dev = dev; | |
1060 | entry->state = tx_start; | |
1061 | entry->length = length; | |
1062 | ||
1da177e4 LT |
1063 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1064 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1065 | |
1066 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1067 | * NOTE: strictly conforming cdc-ether devices should expect | |
1068 | * the ZLP here, but ignore the one-byte packet. | |
1da177e4 | 1069 | */ |
b4d562e3 EP |
1070 | if (length % dev->maxpacket == 0) { |
1071 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
1072 | urb->transfer_buffer_length++; | |
1073 | if (skb_tailroom(skb)) { | |
1074 | skb->data[skb->len] = 0; | |
1075 | __skb_put(skb, 1); | |
1076 | } | |
1077 | } else | |
1078 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1079 | } |
1da177e4 | 1080 | |
69ee472f ON |
1081 | spin_lock_irqsave(&dev->txq.lock, flags); |
1082 | retval = usb_autopm_get_interface_async(dev->intf); | |
1083 | if (retval < 0) { | |
1084 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1085 | goto drop; | |
1086 | } | |
1087 | ||
1088 | #ifdef CONFIG_PM | |
1089 | /* if this triggers the device is still a sleep */ | |
1090 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1091 | /* transmission will be done in resume */ | |
1092 | usb_anchor_urb(urb, &dev->deferred); | |
1093 | /* no use to process more packets */ | |
1094 | netif_stop_queue(net); | |
1095 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
60b86755 | 1096 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1097 | goto deferred; |
1098 | } | |
1099 | #endif | |
1da177e4 | 1100 | |
1da177e4 LT |
1101 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1102 | case -EPIPE: | |
1103 | netif_stop_queue (net); | |
2e55cc72 | 1104 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1105 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1106 | break; |
1107 | default: | |
69ee472f | 1108 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1109 | netif_dbg(dev, tx_err, dev->net, |
1110 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1111 | break; |
1112 | case 0: | |
1113 | net->trans_start = jiffies; | |
1114 | __skb_queue_tail (&dev->txq, skb); | |
1115 | if (dev->txq.qlen >= TX_QLEN (dev)) | |
1116 | netif_stop_queue (net); | |
1117 | } | |
1118 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1119 | ||
1120 | if (retval) { | |
a475f603 | 1121 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1122 | drop: |
7963837f | 1123 | dev->net->stats.tx_dropped++; |
1da177e4 LT |
1124 | if (skb) |
1125 | dev_kfree_skb_any (skb); | |
1126 | usb_free_urb (urb); | |
a475f603 JP |
1127 | } else |
1128 | netif_dbg(dev, tx_queued, dev->net, | |
1129 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1130 | #ifdef CONFIG_PM |
1131 | deferred: | |
1132 | #endif | |
25a79c41 | 1133 | return NETDEV_TX_OK; |
1da177e4 | 1134 | } |
777baa47 | 1135 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 LT |
1136 | |
1137 | /*-------------------------------------------------------------------------*/ | |
1138 | ||
1139 | // tasklet (work deferred from completions, in_irq) or timer | |
1140 | ||
1141 | static void usbnet_bh (unsigned long param) | |
1142 | { | |
1143 | struct usbnet *dev = (struct usbnet *) param; | |
1144 | struct sk_buff *skb; | |
1145 | struct skb_data *entry; | |
1146 | ||
1147 | while ((skb = skb_dequeue (&dev->done))) { | |
1148 | entry = (struct skb_data *) skb->cb; | |
1149 | switch (entry->state) { | |
18ab458f | 1150 | case rx_done: |
1da177e4 LT |
1151 | entry->state = rx_cleanup; |
1152 | rx_process (dev, skb); | |
1153 | continue; | |
18ab458f DB |
1154 | case tx_done: |
1155 | case rx_cleanup: | |
1da177e4 LT |
1156 | usb_free_urb (entry->urb); |
1157 | dev_kfree_skb (skb); | |
1158 | continue; | |
18ab458f | 1159 | default: |
60b86755 | 1160 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1161 | } |
1162 | } | |
1163 | ||
1164 | // waiting for all pending urbs to complete? | |
1165 | if (dev->wait) { | |
1166 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1167 | wake_up (dev->wait); | |
1168 | } | |
1169 | ||
1170 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1171 | } else if (netif_running (dev->net) && |
1172 | netif_device_present (dev->net) && | |
1173 | !timer_pending (&dev->delay) && | |
1174 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
1175 | int temp = dev->rxq.qlen; |
1176 | int qlen = RX_QLEN (dev); | |
1177 | ||
1178 | if (temp < qlen) { | |
1179 | struct urb *urb; | |
1180 | int i; | |
1181 | ||
1182 | // don't refill the queue all at once | |
1183 | for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { | |
1184 | urb = usb_alloc_urb (0, GFP_ATOMIC); | |
dacb3975 DM |
1185 | if (urb != NULL) { |
1186 | if (rx_submit (dev, urb, GFP_ATOMIC) == | |
1187 | -ENOLINK) | |
1188 | return; | |
1189 | } | |
1da177e4 | 1190 | } |
a475f603 JP |
1191 | if (temp != dev->rxq.qlen) |
1192 | netif_dbg(dev, link, dev->net, | |
1193 | "rxqlen %d --> %d\n", | |
1194 | temp, dev->rxq.qlen); | |
1da177e4 LT |
1195 | if (dev->rxq.qlen < qlen) |
1196 | tasklet_schedule (&dev->bh); | |
1197 | } | |
1198 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1199 | netif_wake_queue (dev->net); | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | ||
1da177e4 LT |
1204 | /*------------------------------------------------------------------------- |
1205 | * | |
1206 | * USB Device Driver support | |
1207 | * | |
1208 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1209 | |
1da177e4 LT |
1210 | // precondition: never called in_interrupt |
1211 | ||
38bde1d4 | 1212 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1213 | { |
1214 | struct usbnet *dev; | |
1215 | struct usb_device *xdev; | |
1216 | struct net_device *net; | |
1217 | ||
1218 | dev = usb_get_intfdata(intf); | |
1219 | usb_set_intfdata(intf, NULL); | |
1220 | if (!dev) | |
1221 | return; | |
1222 | ||
1223 | xdev = interface_to_usbdev (intf); | |
1224 | ||
a475f603 JP |
1225 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1226 | intf->dev.driver->name, | |
1227 | xdev->bus->bus_name, xdev->devpath, | |
1228 | dev->driver_info->description); | |
cb1cebbe | 1229 | |
1da177e4 LT |
1230 | net = dev->net; |
1231 | unregister_netdev (net); | |
1232 | ||
1233 | /* we don't hold rtnl here ... */ | |
1234 | flush_scheduled_work (); | |
1235 | ||
1236 | if (dev->driver_info->unbind) | |
1237 | dev->driver_info->unbind (dev, intf); | |
1238 | ||
1239 | free_netdev(net); | |
1240 | usb_put_dev (xdev); | |
1241 | } | |
38bde1d4 | 1242 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1243 | |
777baa47 SH |
1244 | static const struct net_device_ops usbnet_netdev_ops = { |
1245 | .ndo_open = usbnet_open, | |
1246 | .ndo_stop = usbnet_stop, | |
1247 | .ndo_start_xmit = usbnet_start_xmit, | |
1248 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1249 | .ndo_change_mtu = usbnet_change_mtu, | |
1250 | .ndo_set_mac_address = eth_mac_addr, | |
1251 | .ndo_validate_addr = eth_validate_addr, | |
1252 | }; | |
1da177e4 LT |
1253 | |
1254 | /*-------------------------------------------------------------------------*/ | |
1255 | ||
1da177e4 LT |
1256 | // precondition: never called in_interrupt |
1257 | ||
225794f8 MH |
1258 | static struct device_type wlan_type = { |
1259 | .name = "wlan", | |
1260 | }; | |
1261 | ||
1262 | static struct device_type wwan_type = { | |
1263 | .name = "wwan", | |
1264 | }; | |
1265 | ||
38bde1d4 | 1266 | int |
1da177e4 LT |
1267 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1268 | { | |
1269 | struct usbnet *dev; | |
cb1cebbe | 1270 | struct net_device *net; |
1da177e4 LT |
1271 | struct usb_host_interface *interface; |
1272 | struct driver_info *info; | |
1273 | struct usb_device *xdev; | |
1274 | int status; | |
296c0242 | 1275 | const char *name; |
1da177e4 | 1276 | |
296c0242 | 1277 | name = udev->dev.driver->name; |
1da177e4 LT |
1278 | info = (struct driver_info *) prod->driver_info; |
1279 | if (!info) { | |
296c0242 | 1280 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1281 | return -ENODEV; |
1282 | } | |
1283 | xdev = interface_to_usbdev (udev); | |
1284 | interface = udev->cur_altsetting; | |
1285 | ||
1286 | usb_get_dev (xdev); | |
1287 | ||
1288 | status = -ENOMEM; | |
1289 | ||
1290 | // set up our own records | |
1291 | net = alloc_etherdev(sizeof(*dev)); | |
1292 | if (!net) { | |
1293 | dbg ("can't kmalloc dev"); | |
1294 | goto out; | |
1295 | } | |
1296 | ||
0dacca73 BH |
1297 | /* netdev_printk() needs this so do it as early as possible */ |
1298 | SET_NETDEV_DEV(net, &udev->dev); | |
1299 | ||
1da177e4 LT |
1300 | dev = netdev_priv(net); |
1301 | dev->udev = xdev; | |
a11a6544 | 1302 | dev->intf = udev; |
1da177e4 | 1303 | dev->driver_info = info; |
296c0242 | 1304 | dev->driver_name = name; |
1da177e4 LT |
1305 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1306 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1307 | skb_queue_head_init (&dev->rxq); | |
1308 | skb_queue_head_init (&dev->txq); | |
1309 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1310 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1311 | dev->bh.func = usbnet_bh; |
1312 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1313 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1314 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1315 | dev->delay.function = usbnet_bh; |
1316 | dev->delay.data = (unsigned long) dev; | |
1317 | init_timer (&dev->delay); | |
a9fc6338 | 1318 | mutex_init (&dev->phy_mutex); |
1da177e4 | 1319 | |
1da177e4 LT |
1320 | dev->net = net; |
1321 | strcpy (net->name, "usb%d"); | |
1322 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1323 | ||
2e55cc72 DB |
1324 | /* rx and tx sides can use different message sizes; |
1325 | * bind() should set rx_urb_size in that case. | |
1326 | */ | |
1327 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1328 | #if 0 |
1329 | // dma_supported() is deeply broken on almost all architectures | |
1330 | // possible with some EHCI controllers | |
6a35528a | 1331 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1332 | net->features |= NETIF_F_HIGHDMA; |
1333 | #endif | |
1334 | ||
777baa47 | 1335 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1336 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1337 | net->ethtool_ops = &usbnet_ethtool_ops; |
1338 | ||
1339 | // allow device-specific bind/init procedures | |
1340 | // NOTE net->name still not usable ... | |
1341 | if (info->bind) { | |
1342 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1343 | if (status < 0) |
1344 | goto out1; | |
1345 | ||
1da177e4 LT |
1346 | // heuristic: "usb%d" for links we know are two-host, |
1347 | // else "eth%d" when there's reasonable doubt. userspace | |
1348 | // can rename the link if it knows better. | |
8e95a202 JP |
1349 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
1350 | (net->dev_addr [0] & 0x02) == 0) | |
1da177e4 | 1351 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1352 | /* WLAN devices should always be named "wlan%d" */ |
1353 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1354 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1355 | /* WWAN devices should always be named "wwan%d" */ |
1356 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1357 | strcpy(net->name, "wwan%d"); | |
f29fc259 DB |
1358 | |
1359 | /* maybe the remote can't receive an Ethernet MTU */ | |
1360 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1361 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1362 | } else if (!info->in || !info->out) |
1363 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1364 | else { |
1365 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1366 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1367 | if (!(info->flags & FLAG_NO_SETINT)) | |
1368 | status = usb_set_interface (xdev, | |
1369 | interface->desc.bInterfaceNumber, | |
1370 | interface->desc.bAlternateSetting); | |
1371 | else | |
1372 | status = 0; | |
1373 | ||
1374 | } | |
9514bfe5 | 1375 | if (status >= 0 && dev->status) |
1da177e4 LT |
1376 | status = init_status (dev, udev); |
1377 | if (status < 0) | |
cb1cebbe | 1378 | goto out3; |
1da177e4 | 1379 | |
2e55cc72 DB |
1380 | if (!dev->rx_urb_size) |
1381 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1382 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1383 | |
225794f8 MH |
1384 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1385 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1386 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1387 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1388 | ||
1da177e4 LT |
1389 | status = register_netdev (net); |
1390 | if (status) | |
1391 | goto out3; | |
a475f603 JP |
1392 | netif_info(dev, probe, dev->net, |
1393 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1394 | udev->dev.driver->name, | |
1395 | xdev->bus->bus_name, xdev->devpath, | |
1396 | dev->driver_info->description, | |
1397 | net->dev_addr); | |
1da177e4 LT |
1398 | |
1399 | // ok, it's ready to go. | |
1400 | usb_set_intfdata (udev, dev); | |
1401 | ||
1da177e4 LT |
1402 | netif_device_attach (net); |
1403 | ||
37e8273c BH |
1404 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
1405 | netif_carrier_off(net); | |
1406 | ||
1da177e4 LT |
1407 | return 0; |
1408 | ||
1409 | out3: | |
1410 | if (info->unbind) | |
1411 | info->unbind (dev, udev); | |
1412 | out1: | |
1413 | free_netdev(net); | |
1414 | out: | |
1415 | usb_put_dev(xdev); | |
1416 | return status; | |
1417 | } | |
38bde1d4 | 1418 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1419 | |
1420 | /*-------------------------------------------------------------------------*/ | |
1421 | ||
36433127 ON |
1422 | /* |
1423 | * suspend the whole driver as soon as the first interface is suspended | |
1424 | * resume only when the last interface is resumed | |
38bde1d4 | 1425 | */ |
1da177e4 | 1426 | |
38bde1d4 | 1427 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1428 | { |
1429 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1430 | |
36433127 | 1431 | if (!dev->suspend_count++) { |
69ee472f ON |
1432 | spin_lock_irq(&dev->txq.lock); |
1433 | /* don't autosuspend while transmitting */ | |
1434 | if (dev->txq.qlen && (message.event & PM_EVENT_AUTO)) { | |
1435 | spin_unlock_irq(&dev->txq.lock); | |
1436 | return -EBUSY; | |
1437 | } else { | |
1438 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1439 | spin_unlock_irq(&dev->txq.lock); | |
1440 | } | |
a11a6544 ON |
1441 | /* |
1442 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1443 | * having everything error out. |
1444 | */ | |
1445 | netif_device_detach (dev->net); | |
69ee472f ON |
1446 | usbnet_terminate_urbs(dev); |
1447 | usb_kill_urb(dev->interrupt); | |
1448 | ||
a11a6544 ON |
1449 | /* |
1450 | * reattach so runtime management can use and | |
1451 | * wake the device | |
1452 | */ | |
1453 | netif_device_attach (dev->net); | |
36433127 | 1454 | } |
1da177e4 LT |
1455 | return 0; |
1456 | } | |
38bde1d4 | 1457 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1458 | |
38bde1d4 | 1459 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1460 | { |
1461 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1462 | struct sk_buff *skb; |
1463 | struct urb *res; | |
1464 | int retval; | |
1465 | ||
1466 | if (!--dev->suspend_count) { | |
1467 | spin_lock_irq(&dev->txq.lock); | |
1468 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1469 | ||
69ee472f ON |
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"); |