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> |
b0786b43 | 48 | #include <linux/pm_runtime.h> |
f29fc259 DB |
49 | |
50 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
51 | |
52 | ||
53 | /*-------------------------------------------------------------------------*/ | |
54 | ||
55 | /* | |
56 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
57 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
58 | * One maximum size Ethernet packet takes twenty four of them. | |
59 | * For high speed, each frame comfortably fits almost 36 max size | |
60 | * Ethernet packets (so queues should be bigger). | |
f29fc259 DB |
61 | * |
62 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to | |
63 | * let the USB host controller be busy for 5msec or more before an irq | |
64 | * is required, under load. Jumbograms change the equation. | |
1da177e4 | 65 | */ |
a99c1949 JP |
66 | #define RX_MAX_QUEUE_MEMORY (60 * 1518) |
67 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
68 | (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4) | |
69 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
70 | (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4) | |
1da177e4 | 71 | |
1da177e4 LT |
72 | // reawaken network queue this soon after stopping; else watchdog barks |
73 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
74 | ||
75 | // throttle rx/tx briefly after some faults, so khubd might disconnect() | |
76 | // us (it polls at HZ/4 usually) before we report too many false errors. | |
77 | #define THROTTLE_JIFFIES (HZ/8) | |
78 | ||
1da177e4 LT |
79 | // between wakeups |
80 | #define UNLINK_TIMEOUT_MS 3 | |
81 | ||
82 | /*-------------------------------------------------------------------------*/ | |
83 | ||
84 | // randomly generated ethernet address | |
85 | static u8 node_id [ETH_ALEN]; | |
86 | ||
1da177e4 LT |
87 | static const char driver_name [] = "usbnet"; |
88 | ||
89 | /* use ethtool to change the level for any given device */ | |
90 | static int msg_level = -1; | |
91 | module_param (msg_level, int, 0); | |
92 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
93 | ||
1da177e4 LT |
94 | /*-------------------------------------------------------------------------*/ |
95 | ||
1da177e4 | 96 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 97 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
98 | { |
99 | int tmp; | |
100 | struct usb_host_interface *alt = NULL; | |
101 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
102 | struct usb_host_endpoint *status = NULL; | |
103 | ||
104 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
105 | unsigned ep; | |
106 | ||
107 | in = out = status = NULL; | |
108 | alt = intf->altsetting + tmp; | |
109 | ||
110 | /* take the first altsetting with in-bulk + out-bulk; | |
111 | * remember any status endpoint, just in case; | |
70f23fd6 | 112 | * ignore other endpoints and altsettings. |
1da177e4 LT |
113 | */ |
114 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
115 | struct usb_host_endpoint *e; | |
116 | int intr = 0; | |
117 | ||
118 | e = alt->endpoint + ep; | |
119 | switch (e->desc.bmAttributes) { | |
120 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 121 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
122 | continue; |
123 | intr = 1; | |
124 | /* FALLTHROUGH */ | |
125 | case USB_ENDPOINT_XFER_BULK: | |
126 | break; | |
127 | default: | |
128 | continue; | |
129 | } | |
fc6e2544 | 130 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
131 | if (!intr && !in) |
132 | in = e; | |
133 | else if (intr && !status) | |
134 | status = e; | |
135 | } else { | |
136 | if (!out) | |
137 | out = e; | |
138 | } | |
139 | } | |
140 | if (in && out) | |
141 | break; | |
142 | } | |
143 | if (!alt || !in || !out) | |
144 | return -EINVAL; | |
145 | ||
8e95a202 JP |
146 | if (alt->desc.bAlternateSetting != 0 || |
147 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
148 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
149 | alt->desc.bAlternateSetting); | |
150 | if (tmp < 0) | |
151 | return tmp; | |
152 | } | |
cb1cebbe | 153 | |
1da177e4 LT |
154 | dev->in = usb_rcvbulkpipe (dev->udev, |
155 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
156 | dev->out = usb_sndbulkpipe (dev->udev, | |
157 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
158 | dev->status = status; | |
159 | return 0; | |
160 | } | |
2e55cc72 | 161 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 162 | |
03ad032b PH |
163 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
164 | { | |
165 | int tmp, i; | |
166 | unsigned char buf [13]; | |
167 | ||
168 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); | |
169 | if (tmp != 12) { | |
170 | dev_dbg(&dev->udev->dev, | |
171 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
172 | if (tmp >= 0) | |
173 | tmp = -EINVAL; | |
174 | return tmp; | |
175 | } | |
176 | for (i = tmp = 0; i < 6; i++, tmp += 2) | |
177 | dev->net->dev_addr [i] = | |
fd1f170d | 178 | (hex_to_bin(buf[tmp]) << 4) + hex_to_bin(buf[tmp + 1]); |
03ad032b PH |
179 | return 0; |
180 | } | |
181 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
182 | ||
24ead299 | 183 | static void intr_complete (struct urb *urb) |
184 | { | |
185 | struct usbnet *dev = urb->context; | |
186 | int status = urb->status; | |
187 | ||
188 | switch (status) { | |
189 | /* success */ | |
190 | case 0: | |
191 | dev->driver_info->status(dev, urb); | |
192 | break; | |
193 | ||
194 | /* software-driven interface shutdown */ | |
195 | case -ENOENT: /* urb killed */ | |
196 | case -ESHUTDOWN: /* hardware gone */ | |
197 | netif_dbg(dev, ifdown, dev->net, | |
198 | "intr shutdown, code %d\n", status); | |
199 | return; | |
200 | ||
201 | /* NOTE: not throttling like RX/TX, since this endpoint | |
202 | * already polls infrequently | |
203 | */ | |
204 | default: | |
205 | netdev_dbg(dev->net, "intr status %d\n", status); | |
206 | break; | |
207 | } | |
208 | ||
24ead299 | 209 | status = usb_submit_urb (urb, GFP_ATOMIC); |
210 | if (status != 0) | |
211 | netif_err(dev, timer, dev->net, | |
212 | "intr resubmit --> %d\n", status); | |
213 | } | |
1da177e4 LT |
214 | |
215 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
216 | { | |
217 | char *buf = NULL; | |
218 | unsigned pipe = 0; | |
219 | unsigned maxp; | |
220 | unsigned period; | |
221 | ||
222 | if (!dev->driver_info->status) | |
223 | return 0; | |
224 | ||
225 | pipe = usb_rcvintpipe (dev->udev, | |
226 | dev->status->desc.bEndpointAddress | |
227 | & USB_ENDPOINT_NUMBER_MASK); | |
228 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
229 | ||
230 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
231 | period = max ((int) dev->status->desc.bInterval, | |
232 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
233 | ||
e94b1766 | 234 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 235 | if (buf) { |
e94b1766 | 236 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
237 | if (!dev->interrupt) { |
238 | kfree (buf); | |
239 | return -ENOMEM; | |
240 | } else { | |
241 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
242 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 243 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
244 | dev_dbg(&intf->dev, |
245 | "status ep%din, %d bytes period %d\n", | |
246 | usb_pipeendpoint(pipe), maxp, period); | |
247 | } | |
248 | } | |
18ab458f | 249 | return 0; |
1da177e4 LT |
250 | } |
251 | ||
6eecdc5f DW |
252 | /* Submit the interrupt URB if not previously submitted, increasing refcount */ |
253 | int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags) | |
254 | { | |
255 | int ret = 0; | |
256 | ||
257 | WARN_ON_ONCE(dev->interrupt == NULL); | |
258 | if (dev->interrupt) { | |
259 | mutex_lock(&dev->interrupt_mutex); | |
260 | ||
261 | if (++dev->interrupt_count == 1) | |
262 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
263 | ||
264 | dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n", | |
265 | dev->interrupt_count); | |
266 | mutex_unlock(&dev->interrupt_mutex); | |
267 | } | |
268 | return ret; | |
269 | } | |
270 | EXPORT_SYMBOL_GPL(usbnet_status_start); | |
271 | ||
272 | /* For resume; submit interrupt URB if previously submitted */ | |
273 | static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags) | |
274 | { | |
275 | int ret = 0; | |
276 | ||
277 | mutex_lock(&dev->interrupt_mutex); | |
278 | if (dev->interrupt_count) { | |
279 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
280 | dev_dbg(&dev->udev->dev, | |
281 | "submitted interrupt URB for resume\n"); | |
282 | } | |
283 | mutex_unlock(&dev->interrupt_mutex); | |
284 | return ret; | |
285 | } | |
286 | ||
287 | /* Kill the interrupt URB if all submitters want it killed */ | |
288 | void usbnet_status_stop(struct usbnet *dev) | |
289 | { | |
290 | if (dev->interrupt) { | |
291 | mutex_lock(&dev->interrupt_mutex); | |
292 | WARN_ON(dev->interrupt_count == 0); | |
293 | ||
294 | if (dev->interrupt_count && --dev->interrupt_count == 0) | |
295 | usb_kill_urb(dev->interrupt); | |
296 | ||
297 | dev_dbg(&dev->udev->dev, | |
298 | "decremented interrupt URB count to %d\n", | |
299 | dev->interrupt_count); | |
300 | mutex_unlock(&dev->interrupt_mutex); | |
301 | } | |
302 | } | |
303 | EXPORT_SYMBOL_GPL(usbnet_status_stop); | |
304 | ||
305 | /* For suspend; always kill interrupt URB */ | |
306 | static void __usbnet_status_stop_force(struct usbnet *dev) | |
307 | { | |
308 | if (dev->interrupt) { | |
309 | mutex_lock(&dev->interrupt_mutex); | |
310 | usb_kill_urb(dev->interrupt); | |
311 | dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n"); | |
312 | mutex_unlock(&dev->interrupt_mutex); | |
313 | } | |
314 | } | |
315 | ||
2e55cc72 DB |
316 | /* Passes this packet up the stack, updating its accounting. |
317 | * Some link protocols batch packets, so their rx_fixup paths | |
318 | * can return clones as well as just modify the original skb. | |
319 | */ | |
320 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
321 | { |
322 | int status; | |
323 | ||
7834ddbc JK |
324 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
325 | skb_queue_tail(&dev->rxq_pause, skb); | |
326 | return; | |
327 | } | |
328 | ||
1da177e4 | 329 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
330 | dev->net->stats.rx_packets++; |
331 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 332 | |
a475f603 JP |
333 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
334 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 335 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
336 | |
337 | if (skb_defer_rx_timestamp(skb)) | |
338 | return; | |
339 | ||
1da177e4 | 340 | status = netif_rx (skb); |
a475f603 JP |
341 | if (status != NET_RX_SUCCESS) |
342 | netif_dbg(dev, rx_err, dev->net, | |
343 | "netif_rx status %d\n", status); | |
1da177e4 | 344 | } |
2e55cc72 | 345 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 LT |
346 | |
347 | \f | |
1da177e4 LT |
348 | /*------------------------------------------------------------------------- |
349 | * | |
350 | * Network Device Driver (peer link to "Host Device", from USB host) | |
351 | * | |
352 | *-------------------------------------------------------------------------*/ | |
353 | ||
777baa47 | 354 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
355 | { |
356 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 357 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
358 | int old_hard_mtu = dev->hard_mtu; |
359 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 360 | |
a99c1949 | 361 | if (new_mtu <= 0) |
1da177e4 | 362 | return -EINVAL; |
1da177e4 | 363 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 364 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
365 | return -EDOM; |
366 | net->mtu = new_mtu; | |
a99c1949 JP |
367 | |
368 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
369 | if (dev->rx_urb_size == old_hard_mtu) { | |
370 | dev->rx_urb_size = dev->hard_mtu; | |
371 | if (dev->rx_urb_size > old_rx_urb_size) | |
372 | usbnet_unlink_rx_urbs(dev); | |
373 | } | |
374 | ||
1da177e4 LT |
375 | return 0; |
376 | } | |
777baa47 | 377 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 | 378 | |
5b6e9bcd ML |
379 | /* The caller must hold list->lock */ |
380 | static void __usbnet_queue_skb(struct sk_buff_head *list, | |
381 | struct sk_buff *newsk, enum skb_state state) | |
382 | { | |
383 | struct skb_data *entry = (struct skb_data *) newsk->cb; | |
384 | ||
385 | __skb_queue_tail(list, newsk); | |
386 | entry->state = state; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | /*-------------------------------------------------------------------------*/ |
390 | ||
1da177e4 LT |
391 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
392 | * completion callbacks. 2.5 should have fixed those bugs... | |
393 | */ | |
394 | ||
5b6e9bcd ML |
395 | static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb, |
396 | struct sk_buff_head *list, enum skb_state state) | |
1da177e4 | 397 | { |
1da177e4 | 398 | unsigned long flags; |
5b6e9bcd ML |
399 | enum skb_state old_state; |
400 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1da177e4 | 401 | |
8728b834 | 402 | spin_lock_irqsave(&list->lock, flags); |
5b6e9bcd ML |
403 | old_state = entry->state; |
404 | entry->state = state; | |
8728b834 DM |
405 | __skb_unlink(skb, list); |
406 | spin_unlock(&list->lock); | |
407 | spin_lock(&dev->done.lock); | |
408 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 409 | if (dev->done.qlen == 1) |
8728b834 DM |
410 | tasklet_schedule(&dev->bh); |
411 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
5b6e9bcd | 412 | return old_state; |
1da177e4 LT |
413 | } |
414 | ||
415 | /* some work can't be done in tasklets, so we use keventd | |
416 | * | |
417 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
418 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
419 | */ | |
2e55cc72 | 420 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
421 | { |
422 | set_bit (work, &dev->flags); | |
9532021d SG |
423 | if (!schedule_work (&dev->kevent)) { |
424 | if (net_ratelimit()) | |
425 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
426 | } else { | |
60b86755 | 427 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 428 | } |
1da177e4 | 429 | } |
2e55cc72 | 430 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
431 | |
432 | /*-------------------------------------------------------------------------*/ | |
433 | ||
7d12e780 | 434 | static void rx_complete (struct urb *urb); |
1da177e4 | 435 | |
dacb3975 | 436 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
437 | { |
438 | struct sk_buff *skb; | |
439 | struct skb_data *entry; | |
440 | int retval = 0; | |
441 | unsigned long lockflags; | |
2e55cc72 | 442 | size_t size = dev->rx_urb_size; |
1da177e4 | 443 | |
70c37bf9 BM |
444 | /* prevent rx skb allocation when error ratio is high */ |
445 | if (test_bit(EVENT_RX_KILL, &dev->flags)) { | |
446 | usb_free_urb(urb); | |
447 | return -ENOLINK; | |
448 | } | |
449 | ||
7bdd4027 ED |
450 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
451 | if (!skb) { | |
a475f603 | 452 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 453 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 454 | usb_free_urb (urb); |
dacb3975 | 455 | return -ENOMEM; |
1da177e4 | 456 | } |
1da177e4 LT |
457 | |
458 | entry = (struct skb_data *) skb->cb; | |
459 | entry->urb = urb; | |
460 | entry->dev = dev; | |
1da177e4 LT |
461 | entry->length = 0; |
462 | ||
463 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
464 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
465 | |
466 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
467 | ||
8e95a202 JP |
468 | if (netif_running (dev->net) && |
469 | netif_device_present (dev->net) && | |
69ee472f ON |
470 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
471 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 472 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 473 | case -EPIPE: |
2e55cc72 | 474 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
475 | break; |
476 | case -ENOMEM: | |
2e55cc72 | 477 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
478 | break; |
479 | case -ENODEV: | |
a475f603 | 480 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
481 | netif_device_detach (dev->net); |
482 | break; | |
dacb3975 DM |
483 | case -EHOSTUNREACH: |
484 | retval = -ENOLINK; | |
485 | break; | |
1da177e4 | 486 | default: |
a475f603 JP |
487 | netif_dbg(dev, rx_err, dev->net, |
488 | "rx submit, %d\n", retval); | |
1da177e4 LT |
489 | tasklet_schedule (&dev->bh); |
490 | break; | |
491 | case 0: | |
5b6e9bcd | 492 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
493 | } |
494 | } else { | |
a475f603 | 495 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
496 | retval = -ENOLINK; |
497 | } | |
498 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
499 | if (retval) { | |
500 | dev_kfree_skb_any (skb); | |
501 | usb_free_urb (urb); | |
502 | } | |
dacb3975 | 503 | return retval; |
1da177e4 LT |
504 | } |
505 | ||
506 | ||
507 | /*-------------------------------------------------------------------------*/ | |
508 | ||
509 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
510 | { | |
8e95a202 | 511 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
512 | !dev->driver_info->rx_fixup (dev, skb)) { |
513 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
514 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
515 | dev->net->stats.rx_errors++; | |
516 | goto done; | |
517 | } | |
1da177e4 LT |
518 | // else network stack removes extra byte if we forced a short packet |
519 | ||
07ea875e EG |
520 | /* all data was already cloned from skb inside the driver */ |
521 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
522 | goto done; | |
523 | ||
524 | if (skb->len < ETH_HLEN) { | |
525 | dev->net->stats.rx_errors++; | |
526 | dev->net->stats.rx_length_errors++; | |
527 | netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len); | |
528 | } else { | |
529 | usbnet_skb_return(dev, skb); | |
073285fd | 530 | return; |
1da177e4 | 531 | } |
073285fd | 532 | |
7a635ea9 | 533 | done: |
073285fd | 534 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
535 | } |
536 | ||
537 | /*-------------------------------------------------------------------------*/ | |
538 | ||
7d12e780 | 539 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
540 | { |
541 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
542 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
543 | struct usbnet *dev = entry->dev; | |
544 | int urb_status = urb->status; | |
5b6e9bcd | 545 | enum skb_state state; |
1da177e4 LT |
546 | |
547 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 548 | state = rx_done; |
1da177e4 LT |
549 | entry->urb = NULL; |
550 | ||
551 | switch (urb_status) { | |
18ab458f DB |
552 | /* success */ |
553 | case 0: | |
1da177e4 LT |
554 | break; |
555 | ||
18ab458f DB |
556 | /* stalls need manual reset. this is rare ... except that |
557 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 558 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
559 | * storm, recovering as needed. |
560 | */ | |
561 | case -EPIPE: | |
7963837f | 562 | dev->net->stats.rx_errors++; |
2e55cc72 | 563 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
564 | // FALLTHROUGH |
565 | ||
18ab458f DB |
566 | /* software-driven interface shutdown */ |
567 | case -ECONNRESET: /* async unlink */ | |
568 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
569 | netif_dbg(dev, ifdown, dev->net, |
570 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
571 | goto block; |
572 | ||
18ab458f DB |
573 | /* we get controller i/o faults during khubd disconnect() delays. |
574 | * throttle down resubmits, to avoid log floods; just temporarily, | |
575 | * so we still recover when the fault isn't a khubd delay. | |
576 | */ | |
577 | case -EPROTO: | |
578 | case -ETIME: | |
579 | case -EILSEQ: | |
7963837f | 580 | dev->net->stats.rx_errors++; |
1da177e4 LT |
581 | if (!timer_pending (&dev->delay)) { |
582 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
583 | netif_dbg(dev, link, dev->net, |
584 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
585 | } |
586 | block: | |
5b6e9bcd | 587 | state = rx_cleanup; |
1da177e4 LT |
588 | entry->urb = urb; |
589 | urb = NULL; | |
590 | break; | |
591 | ||
18ab458f DB |
592 | /* data overrun ... flush fifo? */ |
593 | case -EOVERFLOW: | |
7963837f | 594 | dev->net->stats.rx_over_errors++; |
1da177e4 | 595 | // FALLTHROUGH |
cb1cebbe | 596 | |
18ab458f | 597 | default: |
5b6e9bcd | 598 | state = rx_cleanup; |
7963837f | 599 | dev->net->stats.rx_errors++; |
a475f603 | 600 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
601 | break; |
602 | } | |
603 | ||
70c37bf9 BM |
604 | /* stop rx if packet error rate is high */ |
605 | if (++dev->pkt_cnt > 30) { | |
606 | dev->pkt_cnt = 0; | |
607 | dev->pkt_err = 0; | |
608 | } else { | |
609 | if (state == rx_cleanup) | |
610 | dev->pkt_err++; | |
611 | if (dev->pkt_err > 20) | |
612 | set_bit(EVENT_RX_KILL, &dev->flags); | |
613 | } | |
614 | ||
5b6e9bcd | 615 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
616 | |
617 | if (urb) { | |
8e95a202 | 618 | if (netif_running (dev->net) && |
5b6e9bcd ML |
619 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
620 | state != unlink_start) { | |
1da177e4 | 621 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 622 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
623 | return; |
624 | } | |
625 | usb_free_urb (urb); | |
626 | } | |
a475f603 | 627 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
628 | } |
629 | ||
7834ddbc JK |
630 | /*-------------------------------------------------------------------------*/ |
631 | void usbnet_pause_rx(struct usbnet *dev) | |
632 | { | |
633 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
634 | ||
a475f603 | 635 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
636 | } |
637 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
638 | ||
639 | void usbnet_resume_rx(struct usbnet *dev) | |
640 | { | |
641 | struct sk_buff *skb; | |
642 | int num = 0; | |
643 | ||
644 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
645 | ||
646 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
647 | usbnet_skb_return(dev, skb); | |
648 | num++; | |
649 | } | |
650 | ||
651 | tasklet_schedule(&dev->bh); | |
652 | ||
a475f603 JP |
653 | netif_dbg(dev, rx_status, dev->net, |
654 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
655 | } |
656 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
657 | ||
658 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
659 | { | |
660 | skb_queue_purge(&dev->rxq_pause); | |
661 | } | |
662 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
663 | ||
1da177e4 LT |
664 | /*-------------------------------------------------------------------------*/ |
665 | ||
666 | // unlink pending rx/tx; completion handlers do all other cleanup | |
667 | ||
668 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
669 | { | |
670 | unsigned long flags; | |
5b6e9bcd | 671 | struct sk_buff *skb; |
1da177e4 LT |
672 | int count = 0; |
673 | ||
674 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 675 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
676 | struct skb_data *entry; |
677 | struct urb *urb; | |
678 | int retval; | |
679 | ||
5b6e9bcd ML |
680 | skb_queue_walk(q, skb) { |
681 | entry = (struct skb_data *) skb->cb; | |
682 | if (entry->state != unlink_start) | |
683 | goto found; | |
684 | } | |
685 | break; | |
686 | found: | |
687 | entry->state = unlink_start; | |
1da177e4 | 688 | urb = entry->urb; |
1da177e4 | 689 | |
0956a8c2 | 690 | /* |
691 | * Get reference count of the URB to avoid it to be | |
692 | * freed during usb_unlink_urb, which may trigger | |
693 | * use-after-free problem inside usb_unlink_urb since | |
694 | * usb_unlink_urb is always racing with .complete | |
695 | * handler(include defer_bh). | |
696 | */ | |
697 | usb_get_urb(urb); | |
4231d47e | 698 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
699 | // during some PM-driven resume scenarios, |
700 | // these (async) unlinks complete immediately | |
701 | retval = usb_unlink_urb (urb); | |
702 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 703 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
704 | else |
705 | count++; | |
0956a8c2 | 706 | usb_put_urb(urb); |
4231d47e | 707 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
708 | } |
709 | spin_unlock_irqrestore (&q->lock, flags); | |
710 | return count; | |
711 | } | |
712 | ||
a99c1949 JP |
713 | // Flush all pending rx urbs |
714 | // minidrivers may need to do this when the MTU changes | |
715 | ||
716 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
717 | { | |
718 | if (netif_running(dev->net)) { | |
719 | (void) unlink_urbs (dev, &dev->rxq); | |
720 | tasklet_schedule(&dev->bh); | |
721 | } | |
722 | } | |
723 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
724 | |
725 | /*-------------------------------------------------------------------------*/ | |
726 | ||
727 | // precondition: never called in_interrupt | |
69ee472f ON |
728 | static void usbnet_terminate_urbs(struct usbnet *dev) |
729 | { | |
69ee472f ON |
730 | DECLARE_WAITQUEUE(wait, current); |
731 | int temp; | |
732 | ||
733 | /* ensure there are no more active urbs */ | |
2d4cf3d6 | 734 | add_wait_queue(&dev->wait, &wait); |
69ee472f | 735 | set_current_state(TASK_UNINTERRUPTIBLE); |
69ee472f ON |
736 | temp = unlink_urbs(dev, &dev->txq) + |
737 | unlink_urbs(dev, &dev->rxq); | |
738 | ||
739 | /* maybe wait for deletions to finish. */ | |
740 | while (!skb_queue_empty(&dev->rxq) | |
741 | && !skb_queue_empty(&dev->txq) | |
742 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 743 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 744 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
745 | netif_dbg(dev, ifdown, dev->net, |
746 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
747 | } |
748 | set_current_state(TASK_RUNNING); | |
2d4cf3d6 | 749 | remove_wait_queue(&dev->wait, &wait); |
69ee472f | 750 | } |
1da177e4 | 751 | |
777baa47 | 752 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
753 | { |
754 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 755 | struct driver_info *info = dev->driver_info; |
fe474009 | 756 | int retval, pm, mpn; |
1da177e4 | 757 | |
75bd0cbd | 758 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
759 | netif_stop_queue (net); |
760 | ||
a475f603 | 761 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 762 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
763 | net->stats.rx_packets, net->stats.tx_packets, |
764 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 765 | |
2d4cf3d6 ON |
766 | /* to not race resume */ |
767 | pm = usb_autopm_get_interface(dev->intf); | |
a33e9e7f JK |
768 | /* allow minidriver to stop correctly (wireless devices to turn off |
769 | * radio etc) */ | |
770 | if (info->stop) { | |
771 | retval = info->stop(dev); | |
a475f603 JP |
772 | if (retval < 0) |
773 | netif_info(dev, ifdown, dev->net, | |
774 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
775 | retval, | |
776 | dev->udev->bus->bus_name, dev->udev->devpath, | |
777 | info->description); | |
a33e9e7f JK |
778 | } |
779 | ||
69ee472f ON |
780 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
781 | usbnet_terminate_urbs(dev); | |
1da177e4 | 782 | |
6eecdc5f | 783 | usbnet_status_stop(dev); |
1da177e4 | 784 | |
7834ddbc JK |
785 | usbnet_purge_paused_rxq(dev); |
786 | ||
fe474009 ES |
787 | mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags); |
788 | ||
1da177e4 LT |
789 | /* deferred work (task, timer, softirq) must also stop. |
790 | * can't flush_scheduled_work() until we drop rtnl (later), | |
791 | * else workers could deadlock; so make workers a NOP. | |
792 | */ | |
793 | dev->flags = 0; | |
794 | del_timer_sync (&dev->delay); | |
795 | tasklet_kill (&dev->bh); | |
2d4cf3d6 ON |
796 | if (!pm) |
797 | usb_autopm_put_interface(dev->intf); | |
798 | ||
fe474009 | 799 | if (info->manage_power && mpn) |
69ee472f ON |
800 | info->manage_power(dev, 0); |
801 | else | |
802 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
803 | |
804 | return 0; | |
805 | } | |
777baa47 | 806 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
807 | |
808 | /*-------------------------------------------------------------------------*/ | |
809 | ||
810 | // posts reads, and enables write queuing | |
811 | ||
812 | // precondition: never called in_interrupt | |
813 | ||
777baa47 | 814 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
815 | { |
816 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 817 | int retval; |
1da177e4 LT |
818 | struct driver_info *info = dev->driver_info; |
819 | ||
a11a6544 | 820 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
821 | netif_info(dev, ifup, dev->net, |
822 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
823 | retval, | |
824 | dev->udev->bus->bus_name, | |
825 | dev->udev->devpath, | |
826 | info->description); | |
a11a6544 ON |
827 | goto done_nopm; |
828 | } | |
829 | ||
1da177e4 LT |
830 | // put into "known safe" state |
831 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
832 | netif_info(dev, ifup, dev->net, |
833 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
834 | retval, | |
835 | dev->udev->bus->bus_name, | |
836 | dev->udev->devpath, | |
837 | info->description); | |
1da177e4 LT |
838 | goto done; |
839 | } | |
840 | ||
841 | // insist peer be connected | |
842 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 843 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
844 | goto done; |
845 | } | |
846 | ||
847 | /* start any status interrupt transfer */ | |
848 | if (dev->interrupt) { | |
6eecdc5f | 849 | retval = usbnet_status_start(dev, GFP_KERNEL); |
1da177e4 | 850 | if (retval < 0) { |
a475f603 JP |
851 | netif_err(dev, ifup, dev->net, |
852 | "intr submit %d\n", retval); | |
1da177e4 LT |
853 | goto done; |
854 | } | |
855 | } | |
856 | ||
68972efa | 857 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 858 | netif_start_queue (net); |
a475f603 JP |
859 | netif_info(dev, ifup, dev->net, |
860 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
861 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
862 | dev->net->mtu, | |
863 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
864 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
865 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
866 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
867 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
868 | "simple"); | |
1da177e4 | 869 | |
70c37bf9 BM |
870 | /* reset rx error state */ |
871 | dev->pkt_cnt = 0; | |
872 | dev->pkt_err = 0; | |
873 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
874 | ||
1da177e4 LT |
875 | // delay posting reads until we're fully open |
876 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
877 | if (info->manage_power) { |
878 | retval = info->manage_power(dev, 1); | |
a1c088e0 ON |
879 | if (retval < 0) { |
880 | retval = 0; | |
881 | set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); | |
882 | } else { | |
883 | usb_autopm_put_interface(dev->intf); | |
884 | } | |
69ee472f | 885 | } |
a11a6544 | 886 | return retval; |
1da177e4 | 887 | done: |
a11a6544 ON |
888 | usb_autopm_put_interface(dev->intf); |
889 | done_nopm: | |
1da177e4 LT |
890 | return retval; |
891 | } | |
777baa47 | 892 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
893 | |
894 | /*-------------------------------------------------------------------------*/ | |
895 | ||
2e55cc72 DB |
896 | /* ethtool methods; minidrivers may need to add some more, but |
897 | * they'll probably want to use this base set. | |
898 | */ | |
899 | ||
c41286fd AB |
900 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
901 | { | |
902 | struct usbnet *dev = netdev_priv(net); | |
903 | ||
904 | if (!dev->mii.mdio_read) | |
905 | return -EOPNOTSUPP; | |
906 | ||
907 | return mii_ethtool_gset(&dev->mii, cmd); | |
908 | } | |
909 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
910 | ||
911 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
912 | { | |
913 | struct usbnet *dev = netdev_priv(net); | |
914 | int retval; | |
915 | ||
916 | if (!dev->mii.mdio_write) | |
917 | return -EOPNOTSUPP; | |
918 | ||
919 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
920 | ||
921 | /* link speed/duplex might have changed */ | |
922 | if (dev->driver_info->link_reset) | |
923 | dev->driver_info->link_reset(dev); | |
924 | ||
925 | return retval; | |
926 | ||
927 | } | |
928 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
929 | ||
c41286fd | 930 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
931 | { |
932 | struct usbnet *dev = netdev_priv(net); | |
933 | ||
f29fc259 | 934 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
935 | if (dev->driver_info->check_connect) |
936 | return dev->driver_info->check_connect (dev) == 0; | |
937 | ||
c41286fd AB |
938 | /* if the device has mii operations, use those */ |
939 | if (dev->mii.mdio_read) | |
940 | return mii_link_ok(&dev->mii); | |
941 | ||
05ffb3e2 BM |
942 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
943 | return ethtool_op_get_link(net); | |
1da177e4 | 944 | } |
c41286fd | 945 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 946 | |
18ee91fa | 947 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
948 | { |
949 | struct usbnet *dev = netdev_priv(net); | |
950 | ||
18ee91fa DB |
951 | if (!dev->mii.mdio_write) |
952 | return -EOPNOTSUPP; | |
953 | ||
954 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 955 | } |
18ee91fa | 956 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 957 | |
18ee91fa | 958 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
959 | { |
960 | struct usbnet *dev = netdev_priv(net); | |
961 | ||
86a2f415 PS |
962 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
963 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
964 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
965 | sizeof info->fw_version); |
966 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 967 | } |
18ee91fa | 968 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 969 | |
18ee91fa | 970 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
971 | { |
972 | struct usbnet *dev = netdev_priv(net); | |
973 | ||
18ee91fa DB |
974 | return dev->msg_enable; |
975 | } | |
976 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 977 | |
18ee91fa DB |
978 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
979 | { | |
980 | struct usbnet *dev = netdev_priv(net); | |
981 | ||
982 | dev->msg_enable = level; | |
c41286fd | 983 | } |
18ee91fa | 984 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 985 | |
2e55cc72 | 986 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 987 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
988 | .get_settings = usbnet_get_settings, |
989 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 990 | .get_link = usbnet_get_link, |
c41286fd | 991 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 992 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
993 | .get_msglevel = usbnet_get_msglevel, |
994 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 995 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 996 | }; |
1da177e4 LT |
997 | |
998 | /*-------------------------------------------------------------------------*/ | |
999 | ||
4b49f58f ML |
1000 | static void __handle_link_change(struct usbnet *dev) |
1001 | { | |
1002 | if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1003 | return; | |
1004 | ||
1005 | if (!netif_carrier_ok(dev->net)) { | |
1006 | /* kill URBs for reading packets to save bus bandwidth */ | |
1007 | unlink_urbs(dev, &dev->rxq); | |
1008 | ||
1009 | /* | |
1010 | * tx_timeout will unlink URBs for sending packets and | |
1011 | * tx queue is stopped by netcore after link becomes off | |
1012 | */ | |
1013 | } else { | |
1014 | /* submitting URBs for reading packets */ | |
1015 | tasklet_schedule(&dev->bh); | |
1016 | } | |
1017 | ||
1018 | clear_bit(EVENT_LINK_CHANGE, &dev->flags); | |
1019 | } | |
1020 | ||
1da177e4 LT |
1021 | /* work that cannot be done in interrupt context uses keventd. |
1022 | * | |
1023 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
1024 | * especially now that control transfers can be queued. | |
1025 | */ | |
1026 | static void | |
c4028958 | 1027 | kevent (struct work_struct *work) |
1da177e4 | 1028 | { |
c4028958 DH |
1029 | struct usbnet *dev = |
1030 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
1031 | int status; |
1032 | ||
1033 | /* usb_clear_halt() needs a thread context */ | |
1034 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
1035 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
1036 | status = usb_autopm_get_interface(dev->intf); |
1037 | if (status < 0) | |
1038 | goto fail_pipe; | |
1da177e4 | 1039 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 1040 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1041 | if (status < 0 && |
1042 | status != -EPIPE && | |
1043 | status != -ESHUTDOWN) { | |
1da177e4 | 1044 | if (netif_msg_tx_err (dev)) |
69ee472f | 1045 | fail_pipe: |
60b86755 JP |
1046 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
1047 | status); | |
1da177e4 LT |
1048 | } else { |
1049 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
1050 | if (status != -ESHUTDOWN) |
1051 | netif_wake_queue (dev->net); | |
1da177e4 LT |
1052 | } |
1053 | } | |
1054 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1055 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
1056 | status = usb_autopm_get_interface(dev->intf); |
1057 | if (status < 0) | |
1058 | goto fail_halt; | |
1da177e4 | 1059 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 1060 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1061 | if (status < 0 && |
1062 | status != -EPIPE && | |
1063 | status != -ESHUTDOWN) { | |
1da177e4 | 1064 | if (netif_msg_rx_err (dev)) |
69ee472f | 1065 | fail_halt: |
60b86755 JP |
1066 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
1067 | status); | |
1da177e4 LT |
1068 | } else { |
1069 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
1070 | tasklet_schedule (&dev->bh); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | /* tasklet could resubmit itself forever if memory is tight */ | |
1075 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
1076 | struct urb *urb = NULL; | |
dacb3975 | 1077 | int resched = 1; |
1da177e4 LT |
1078 | |
1079 | if (netif_running (dev->net)) | |
1080 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
1081 | else | |
1082 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
1083 | if (urb != NULL) { | |
1084 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 1085 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
1086 | if (status < 0) { |
1087 | usb_free_urb(urb); | |
69ee472f | 1088 | goto fail_lowmem; |
ab60707f | 1089 | } |
dacb3975 DM |
1090 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
1091 | resched = 0; | |
69ee472f ON |
1092 | usb_autopm_put_interface(dev->intf); |
1093 | fail_lowmem: | |
dacb3975 DM |
1094 | if (resched) |
1095 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
1096 | } |
1097 | } | |
1098 | ||
7ea13c9c | 1099 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 1100 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
1101 | int retval = 0; |
1102 | ||
1103 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1104 | status = usb_autopm_get_interface(dev->intf); |
1105 | if (status < 0) | |
1106 | goto skip_reset; | |
7ea13c9c | 1107 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1108 | usb_autopm_put_interface(dev->intf); |
1109 | skip_reset: | |
60b86755 JP |
1110 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1111 | retval, | |
1112 | dev->udev->bus->bus_name, | |
1113 | dev->udev->devpath, | |
1114 | info->description); | |
69ee472f ON |
1115 | } else { |
1116 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c | 1117 | } |
4b49f58f ML |
1118 | |
1119 | /* handle link change from link resetting */ | |
1120 | __handle_link_change(dev); | |
7ea13c9c DH |
1121 | } |
1122 | ||
4b49f58f ML |
1123 | if (test_bit (EVENT_LINK_CHANGE, &dev->flags)) |
1124 | __handle_link_change(dev); | |
1125 | ||
1da177e4 | 1126 | if (dev->flags) |
60b86755 | 1127 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1128 | } |
1129 | ||
1130 | /*-------------------------------------------------------------------------*/ | |
1131 | ||
7d12e780 | 1132 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1133 | { |
1134 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1135 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1136 | struct usbnet *dev = entry->dev; | |
1137 | ||
1138 | if (urb->status == 0) { | |
073285fd AO |
1139 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
1140 | dev->net->stats.tx_packets++; | |
7963837f | 1141 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1142 | } else { |
7963837f | 1143 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1144 | |
1145 | switch (urb->status) { | |
1146 | case -EPIPE: | |
2e55cc72 | 1147 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1148 | break; |
1149 | ||
1150 | /* software-driven interface shutdown */ | |
1151 | case -ECONNRESET: // async unlink | |
1152 | case -ESHUTDOWN: // hardware gone | |
1153 | break; | |
1154 | ||
1155 | // like rx, tx gets controller i/o faults during khubd delays | |
1156 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
1157 | case -EPROTO: |
1158 | case -ETIME: | |
1159 | case -EILSEQ: | |
69ee472f | 1160 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1161 | if (!timer_pending (&dev->delay)) { |
1162 | mod_timer (&dev->delay, | |
1163 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1164 | netif_dbg(dev, link, dev->net, |
1165 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1166 | } |
1167 | netif_stop_queue (dev->net); | |
1168 | break; | |
1169 | default: | |
a475f603 JP |
1170 | netif_dbg(dev, tx_err, dev->net, |
1171 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1172 | break; |
1173 | } | |
1174 | } | |
1175 | ||
69ee472f | 1176 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1177 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1178 | } |
1179 | ||
1180 | /*-------------------------------------------------------------------------*/ | |
1181 | ||
777baa47 | 1182 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1183 | { |
1184 | struct usbnet *dev = netdev_priv(net); | |
1185 | ||
1186 | unlink_urbs (dev, &dev->txq); | |
1187 | tasklet_schedule (&dev->bh); | |
1188 | ||
1189 | // FIXME: device recovery -- reset? | |
1190 | } | |
777baa47 | 1191 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1192 | |
1193 | /*-------------------------------------------------------------------------*/ | |
1194 | ||
25a79c41 SH |
1195 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1196 | struct net_device *net) | |
1da177e4 LT |
1197 | { |
1198 | struct usbnet *dev = netdev_priv(net); | |
1199 | int length; | |
1da177e4 LT |
1200 | struct urb *urb = NULL; |
1201 | struct skb_data *entry; | |
1202 | struct driver_info *info = dev->driver_info; | |
1203 | unsigned long flags; | |
25a79c41 | 1204 | int retval; |
1da177e4 | 1205 | |
23ba0799 KK |
1206 | if (skb) |
1207 | skb_tx_timestamp(skb); | |
f9b491ec | 1208 | |
1da177e4 LT |
1209 | // some devices want funky USB-level framing, for |
1210 | // win32 driver (usually) and/or hardware quirks | |
1211 | if (info->tx_fixup) { | |
1212 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1213 | if (!skb) { | |
bf414b36 BM |
1214 | /* packet collected; minidriver waiting for more */ |
1215 | if (info->flags & FLAG_MULTI_PACKET) | |
073285fd | 1216 | goto not_drop; |
bf414b36 BM |
1217 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1218 | goto drop; | |
1da177e4 LT |
1219 | } |
1220 | } | |
1221 | length = skb->len; | |
1222 | ||
1223 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1224 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1225 | goto drop; |
1226 | } | |
1227 | ||
1228 | entry = (struct skb_data *) skb->cb; | |
1229 | entry->urb = urb; | |
1230 | entry->dev = dev; | |
1da177e4 LT |
1231 | entry->length = length; |
1232 | ||
1da177e4 LT |
1233 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1234 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1235 | |
1236 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1237 | * NOTE: strictly conforming cdc-ether devices should expect | |
1238 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1239 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1240 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1241 | * packet itself if needed. | |
1da177e4 | 1242 | */ |
b4d562e3 EP |
1243 | if (length % dev->maxpacket == 0) { |
1244 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd AO |
1245 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
1246 | urb->transfer_buffer_length++; | |
1247 | if (skb_tailroom(skb)) { | |
1248 | skb->data[skb->len] = 0; | |
1249 | __skb_put(skb, 1); | |
1250 | } | |
b4d562e3 EP |
1251 | } |
1252 | } else | |
1253 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1254 | } |
1da177e4 | 1255 | |
69ee472f ON |
1256 | spin_lock_irqsave(&dev->txq.lock, flags); |
1257 | retval = usb_autopm_get_interface_async(dev->intf); | |
1258 | if (retval < 0) { | |
1259 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1260 | goto drop; | |
1261 | } | |
1262 | ||
1263 | #ifdef CONFIG_PM | |
1264 | /* if this triggers the device is still a sleep */ | |
1265 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1266 | /* transmission will be done in resume */ | |
1267 | usb_anchor_urb(urb, &dev->deferred); | |
1268 | /* no use to process more packets */ | |
1269 | netif_stop_queue(net); | |
39707c2a | 1270 | usb_put_urb(urb); |
69ee472f | 1271 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1272 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1273 | goto deferred; |
1274 | } | |
1275 | #endif | |
1da177e4 | 1276 | |
1da177e4 LT |
1277 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1278 | case -EPIPE: | |
1279 | netif_stop_queue (net); | |
2e55cc72 | 1280 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1281 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1282 | break; |
1283 | default: | |
69ee472f | 1284 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1285 | netif_dbg(dev, tx_err, dev->net, |
1286 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1287 | break; |
1288 | case 0: | |
1289 | net->trans_start = jiffies; | |
5b6e9bcd | 1290 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1291 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1292 | netif_stop_queue (net); | |
1293 | } | |
1294 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1295 | ||
1296 | if (retval) { | |
a475f603 | 1297 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1298 | drop: |
7963837f | 1299 | dev->net->stats.tx_dropped++; |
073285fd | 1300 | not_drop: |
1da177e4 LT |
1301 | if (skb) |
1302 | dev_kfree_skb_any (skb); | |
1303 | usb_free_urb (urb); | |
a475f603 JP |
1304 | } else |
1305 | netif_dbg(dev, tx_queued, dev->net, | |
1306 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1307 | #ifdef CONFIG_PM |
1308 | deferred: | |
1309 | #endif | |
25a79c41 | 1310 | return NETDEV_TX_OK; |
1da177e4 | 1311 | } |
777baa47 | 1312 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1313 | |
85e87870 | 1314 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1315 | { |
1316 | struct urb *urb; | |
1317 | int i; | |
85e87870 | 1318 | int ret = 0; |
65841fd5 ML |
1319 | |
1320 | /* don't refill the queue all at once */ | |
1321 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1322 | urb = usb_alloc_urb(0, flags); | |
1323 | if (urb != NULL) { | |
85e87870 BM |
1324 | ret = rx_submit(dev, urb, flags); |
1325 | if (ret) | |
1326 | goto err; | |
1327 | } else { | |
1328 | ret = -ENOMEM; | |
1329 | goto err; | |
65841fd5 ML |
1330 | } |
1331 | } | |
85e87870 BM |
1332 | err: |
1333 | return ret; | |
65841fd5 ML |
1334 | } |
1335 | ||
1da177e4 LT |
1336 | /*-------------------------------------------------------------------------*/ |
1337 | ||
1338 | // tasklet (work deferred from completions, in_irq) or timer | |
1339 | ||
1340 | static void usbnet_bh (unsigned long param) | |
1341 | { | |
1342 | struct usbnet *dev = (struct usbnet *) param; | |
1343 | struct sk_buff *skb; | |
1344 | struct skb_data *entry; | |
1345 | ||
1346 | while ((skb = skb_dequeue (&dev->done))) { | |
1347 | entry = (struct skb_data *) skb->cb; | |
1348 | switch (entry->state) { | |
18ab458f | 1349 | case rx_done: |
1da177e4 LT |
1350 | entry->state = rx_cleanup; |
1351 | rx_process (dev, skb); | |
1352 | continue; | |
18ab458f DB |
1353 | case tx_done: |
1354 | case rx_cleanup: | |
1da177e4 LT |
1355 | usb_free_urb (entry->urb); |
1356 | dev_kfree_skb (skb); | |
1357 | continue; | |
18ab458f | 1358 | default: |
60b86755 | 1359 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1360 | } |
1361 | } | |
1362 | ||
70c37bf9 BM |
1363 | /* restart RX again after disabling due to high error rate */ |
1364 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
1365 | ||
2d4cf3d6 ON |
1366 | /* waiting for all pending urbs to complete? |
1367 | * only then can we forgo submitting anew | |
1368 | */ | |
1369 | if (waitqueue_active(&dev->wait)) { | |
1370 | if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0) | |
1371 | wake_up_all(&dev->wait); | |
1da177e4 LT |
1372 | |
1373 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1374 | } else if (netif_running (dev->net) && |
1375 | netif_device_present (dev->net) && | |
4b49f58f | 1376 | netif_carrier_ok(dev->net) && |
8e95a202 JP |
1377 | !timer_pending (&dev->delay) && |
1378 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1379 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1380 | |
1381 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1382 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1383 | return; | |
a475f603 JP |
1384 | if (temp != dev->rxq.qlen) |
1385 | netif_dbg(dev, link, dev->net, | |
1386 | "rxqlen %d --> %d\n", | |
1387 | temp, dev->rxq.qlen); | |
65841fd5 | 1388 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1389 | tasklet_schedule (&dev->bh); |
1390 | } | |
1391 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1392 | netif_wake_queue (dev->net); | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | ||
1da177e4 LT |
1397 | /*------------------------------------------------------------------------- |
1398 | * | |
1399 | * USB Device Driver support | |
1400 | * | |
1401 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1402 | |
1da177e4 LT |
1403 | // precondition: never called in_interrupt |
1404 | ||
38bde1d4 | 1405 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1406 | { |
1407 | struct usbnet *dev; | |
1408 | struct usb_device *xdev; | |
1409 | struct net_device *net; | |
1410 | ||
1411 | dev = usb_get_intfdata(intf); | |
1412 | usb_set_intfdata(intf, NULL); | |
1413 | if (!dev) | |
1414 | return; | |
1415 | ||
1416 | xdev = interface_to_usbdev (intf); | |
1417 | ||
a475f603 JP |
1418 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1419 | intf->dev.driver->name, | |
1420 | xdev->bus->bus_name, xdev->devpath, | |
1421 | dev->driver_info->description); | |
cb1cebbe | 1422 | |
1da177e4 LT |
1423 | net = dev->net; |
1424 | unregister_netdev (net); | |
1425 | ||
23f333a2 | 1426 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1427 | |
39707c2a HK |
1428 | usb_scuttle_anchored_urbs(&dev->deferred); |
1429 | ||
1da177e4 LT |
1430 | if (dev->driver_info->unbind) |
1431 | dev->driver_info->unbind (dev, intf); | |
1432 | ||
68972efa PS |
1433 | usb_kill_urb(dev->interrupt); |
1434 | usb_free_urb(dev->interrupt); | |
1435 | ||
1da177e4 | 1436 | free_netdev(net); |
1da177e4 | 1437 | } |
38bde1d4 | 1438 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1439 | |
777baa47 SH |
1440 | static const struct net_device_ops usbnet_netdev_ops = { |
1441 | .ndo_open = usbnet_open, | |
1442 | .ndo_stop = usbnet_stop, | |
1443 | .ndo_start_xmit = usbnet_start_xmit, | |
1444 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1445 | .ndo_change_mtu = usbnet_change_mtu, | |
1446 | .ndo_set_mac_address = eth_mac_addr, | |
1447 | .ndo_validate_addr = eth_validate_addr, | |
1448 | }; | |
1da177e4 LT |
1449 | |
1450 | /*-------------------------------------------------------------------------*/ | |
1451 | ||
1da177e4 LT |
1452 | // precondition: never called in_interrupt |
1453 | ||
225794f8 MH |
1454 | static struct device_type wlan_type = { |
1455 | .name = "wlan", | |
1456 | }; | |
1457 | ||
1458 | static struct device_type wwan_type = { | |
1459 | .name = "wwan", | |
1460 | }; | |
1461 | ||
38bde1d4 | 1462 | int |
1da177e4 LT |
1463 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1464 | { | |
1465 | struct usbnet *dev; | |
cb1cebbe | 1466 | struct net_device *net; |
1da177e4 LT |
1467 | struct usb_host_interface *interface; |
1468 | struct driver_info *info; | |
1469 | struct usb_device *xdev; | |
1470 | int status; | |
296c0242 | 1471 | const char *name; |
b0786b43 ML |
1472 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1473 | ||
1474 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1475 | * for usb interface, otherwise usb_autopm_get_interface may return | |
98f541c6 | 1476 | * failure if RUNTIME_PM is enabled. |
b0786b43 ML |
1477 | */ |
1478 | if (!driver->supports_autosuspend) { | |
1479 | driver->supports_autosuspend = 1; | |
1480 | pm_runtime_enable(&udev->dev); | |
1481 | } | |
1da177e4 | 1482 | |
296c0242 | 1483 | name = udev->dev.driver->name; |
1da177e4 LT |
1484 | info = (struct driver_info *) prod->driver_info; |
1485 | if (!info) { | |
296c0242 | 1486 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1487 | return -ENODEV; |
1488 | } | |
1489 | xdev = interface_to_usbdev (udev); | |
1490 | interface = udev->cur_altsetting; | |
1491 | ||
1da177e4 LT |
1492 | status = -ENOMEM; |
1493 | ||
1494 | // set up our own records | |
1495 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1496 | if (!net) |
1da177e4 | 1497 | goto out; |
1da177e4 | 1498 | |
0dacca73 BH |
1499 | /* netdev_printk() needs this so do it as early as possible */ |
1500 | SET_NETDEV_DEV(net, &udev->dev); | |
1501 | ||
1da177e4 LT |
1502 | dev = netdev_priv(net); |
1503 | dev->udev = xdev; | |
a11a6544 | 1504 | dev->intf = udev; |
1da177e4 | 1505 | dev->driver_info = info; |
296c0242 | 1506 | dev->driver_name = name; |
1da177e4 LT |
1507 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1508 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
2d4cf3d6 | 1509 | init_waitqueue_head(&dev->wait); |
1da177e4 LT |
1510 | skb_queue_head_init (&dev->rxq); |
1511 | skb_queue_head_init (&dev->txq); | |
1512 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1513 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1514 | dev->bh.func = usbnet_bh; |
1515 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1516 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1517 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1518 | dev->delay.function = usbnet_bh; |
1519 | dev->delay.data = (unsigned long) dev; | |
1520 | init_timer (&dev->delay); | |
a9fc6338 | 1521 | mutex_init (&dev->phy_mutex); |
6eecdc5f DW |
1522 | mutex_init(&dev->interrupt_mutex); |
1523 | dev->interrupt_count = 0; | |
1da177e4 | 1524 | |
1da177e4 LT |
1525 | dev->net = net; |
1526 | strcpy (net->name, "usb%d"); | |
1527 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1528 | ||
2e55cc72 DB |
1529 | /* rx and tx sides can use different message sizes; |
1530 | * bind() should set rx_urb_size in that case. | |
1531 | */ | |
1532 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1533 | #if 0 |
1534 | // dma_supported() is deeply broken on almost all architectures | |
1535 | // possible with some EHCI controllers | |
6a35528a | 1536 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1537 | net->features |= NETIF_F_HIGHDMA; |
1538 | #endif | |
1539 | ||
777baa47 | 1540 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1541 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1542 | net->ethtool_ops = &usbnet_ethtool_ops; |
1543 | ||
1544 | // allow device-specific bind/init procedures | |
1545 | // NOTE net->name still not usable ... | |
1546 | if (info->bind) { | |
1547 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1548 | if (status < 0) |
1549 | goto out1; | |
1550 | ||
1da177e4 LT |
1551 | // heuristic: "usb%d" for links we know are two-host, |
1552 | // else "eth%d" when there's reasonable doubt. userspace | |
1553 | // can rename the link if it knows better. | |
8e95a202 | 1554 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1555 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1556 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1557 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1558 | /* WLAN devices should always be named "wlan%d" */ |
1559 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1560 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1561 | /* WWAN devices should always be named "wwan%d" */ |
1562 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1563 | strcpy(net->name, "wwan%d"); | |
f29fc259 | 1564 | |
6509141f WS |
1565 | /* devices that cannot do ARP */ |
1566 | if ((dev->driver_info->flags & FLAG_NOARP) != 0) | |
1567 | net->flags |= IFF_NOARP; | |
1568 | ||
f29fc259 DB |
1569 | /* maybe the remote can't receive an Ethernet MTU */ |
1570 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1571 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1572 | } else if (!info->in || !info->out) |
1573 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1574 | else { |
1575 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1576 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1577 | if (!(info->flags & FLAG_NO_SETINT)) | |
1578 | status = usb_set_interface (xdev, | |
1579 | interface->desc.bInterfaceNumber, | |
1580 | interface->desc.bAlternateSetting); | |
1581 | else | |
1582 | status = 0; | |
1583 | ||
1584 | } | |
9514bfe5 | 1585 | if (status >= 0 && dev->status) |
1da177e4 LT |
1586 | status = init_status (dev, udev); |
1587 | if (status < 0) | |
cb1cebbe | 1588 | goto out3; |
1da177e4 | 1589 | |
2e55cc72 DB |
1590 | if (!dev->rx_urb_size) |
1591 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1592 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1593 | |
225794f8 MH |
1594 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1595 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1596 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1597 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1598 | ||
1da177e4 LT |
1599 | status = register_netdev (net); |
1600 | if (status) | |
a4723848 | 1601 | goto out4; |
a475f603 JP |
1602 | netif_info(dev, probe, dev->net, |
1603 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1604 | udev->dev.driver->name, | |
1605 | xdev->bus->bus_name, xdev->devpath, | |
1606 | dev->driver_info->description, | |
1607 | net->dev_addr); | |
1da177e4 LT |
1608 | |
1609 | // ok, it's ready to go. | |
1610 | usb_set_intfdata (udev, dev); | |
1611 | ||
1da177e4 LT |
1612 | netif_device_attach (net); |
1613 | ||
37e8273c | 1614 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
0162c554 | 1615 | usbnet_link_change(dev, 0, 0); |
37e8273c | 1616 | |
1da177e4 LT |
1617 | return 0; |
1618 | ||
a4723848 | 1619 | out4: |
1620 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1621 | out3: |
1622 | if (info->unbind) | |
1623 | info->unbind (dev, udev); | |
1624 | out1: | |
cfa74bdc ON |
1625 | /* subdrivers must undo all they did in bind() if they |
1626 | * fail it, but we may fail later and a deferred kevent | |
1627 | * may trigger an error resubmitting itself and, worse, | |
1628 | * schedule a timer. So we kill it all just in case. | |
1629 | */ | |
1630 | cancel_work_sync(&dev->kevent); | |
1631 | del_timer_sync(&dev->delay); | |
1da177e4 LT |
1632 | free_netdev(net); |
1633 | out: | |
1da177e4 LT |
1634 | return status; |
1635 | } | |
38bde1d4 | 1636 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1637 | |
1638 | /*-------------------------------------------------------------------------*/ | |
1639 | ||
36433127 ON |
1640 | /* |
1641 | * suspend the whole driver as soon as the first interface is suspended | |
1642 | * resume only when the last interface is resumed | |
38bde1d4 | 1643 | */ |
1da177e4 | 1644 | |
38bde1d4 | 1645 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1646 | { |
1647 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1648 | |
36433127 | 1649 | if (!dev->suspend_count++) { |
69ee472f ON |
1650 | spin_lock_irq(&dev->txq.lock); |
1651 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1652 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1653 | dev->suspend_count--; |
69ee472f ON |
1654 | spin_unlock_irq(&dev->txq.lock); |
1655 | return -EBUSY; | |
1656 | } else { | |
1657 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1658 | spin_unlock_irq(&dev->txq.lock); | |
1659 | } | |
a11a6544 ON |
1660 | /* |
1661 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1662 | * having everything error out. |
1663 | */ | |
1664 | netif_device_detach (dev->net); | |
69ee472f | 1665 | usbnet_terminate_urbs(dev); |
6eecdc5f | 1666 | __usbnet_status_stop_force(dev); |
69ee472f | 1667 | |
a11a6544 ON |
1668 | /* |
1669 | * reattach so runtime management can use and | |
1670 | * wake the device | |
1671 | */ | |
1672 | netif_device_attach (dev->net); | |
36433127 | 1673 | } |
1da177e4 LT |
1674 | return 0; |
1675 | } | |
38bde1d4 | 1676 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1677 | |
38bde1d4 | 1678 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1679 | { |
1680 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1681 | struct sk_buff *skb; |
1682 | struct urb *res; | |
1683 | int retval; | |
1684 | ||
1685 | if (!--dev->suspend_count) { | |
6eecdc5f DW |
1686 | /* resume interrupt URB if it was previously submitted */ |
1687 | __usbnet_status_start_force(dev, GFP_NOIO); | |
68972efa | 1688 | |
69ee472f ON |
1689 | spin_lock_irq(&dev->txq.lock); |
1690 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1691 | ||
69ee472f ON |
1692 | skb = (struct sk_buff *)res->context; |
1693 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1694 | if (retval < 0) { | |
1695 | dev_kfree_skb_any(skb); | |
1696 | usb_free_urb(res); | |
1697 | usb_autopm_put_interface_async(dev->intf); | |
1698 | } else { | |
1699 | dev->net->trans_start = jiffies; | |
1700 | __skb_queue_tail(&dev->txq, skb); | |
1701 | } | |
1702 | } | |
1da177e4 | 1703 | |
69ee472f ON |
1704 | smp_mb(); |
1705 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1706 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1707 | |
1708 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
2d4cf3d6 ON |
1709 | /* handle remote wakeup ASAP |
1710 | * we cannot race against stop | |
1711 | */ | |
1712 | if (netif_device_present(dev->net) && | |
65841fd5 ML |
1713 | !timer_pending(&dev->delay) && |
1714 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1715 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1716 | |
75bd0cbd | 1717 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1718 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1719 | tasklet_schedule (&dev->bh); |
1720 | } | |
69ee472f | 1721 | } |
5d9d01a3 ON |
1722 | |
1723 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1724 | usb_autopm_get_interface_no_resume(intf); | |
1725 | ||
1da177e4 LT |
1726 | return 0; |
1727 | } | |
38bde1d4 | 1728 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1729 | |
5d9d01a3 ON |
1730 | /* |
1731 | * Either a subdriver implements manage_power, then it is assumed to always | |
1732 | * be ready to be suspended or it reports the readiness to be suspended | |
1733 | * explicitly | |
1734 | */ | |
1735 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1736 | { | |
1737 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1738 | dev->intf->needs_remote_wakeup = 1; | |
1739 | usb_autopm_put_interface_async(dev->intf); | |
1740 | } | |
1741 | } | |
1742 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1743 | |
2dd7c8cf ON |
1744 | /* |
1745 | * For devices that can do without special commands | |
1746 | */ | |
1747 | int usbnet_manage_power(struct usbnet *dev, int on) | |
1748 | { | |
1749 | dev->intf->needs_remote_wakeup = on; | |
1750 | return 0; | |
1751 | } | |
1752 | EXPORT_SYMBOL(usbnet_manage_power); | |
1753 | ||
ac64995d ML |
1754 | void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset) |
1755 | { | |
1756 | /* update link after link is reseted */ | |
1757 | if (link && !need_reset) | |
1758 | netif_carrier_on(dev->net); | |
1759 | else | |
1760 | netif_carrier_off(dev->net); | |
1761 | ||
1762 | if (need_reset && link) | |
1763 | usbnet_defer_kevent(dev, EVENT_LINK_RESET); | |
4b49f58f ML |
1764 | else |
1765 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); | |
ac64995d ML |
1766 | } |
1767 | EXPORT_SYMBOL(usbnet_link_change); | |
1768 | ||
877bd862 | 1769 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1770 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1771 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1772 | { |
1773 | void *buf = NULL; | |
1774 | int err = -ENOMEM; | |
1775 | ||
1776 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1777 | " value=0x%04x index=0x%04x size=%d\n", | |
1778 | cmd, reqtype, value, index, size); | |
1779 | ||
1780 | if (data) { | |
1781 | buf = kmalloc(size, GFP_KERNEL); | |
1782 | if (!buf) | |
1783 | goto out; | |
1784 | } | |
1785 | ||
1786 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1787 | cmd, reqtype, value, index, buf, size, | |
1788 | USB_CTRL_GET_TIMEOUT); | |
1789 | if (err > 0 && err <= size) | |
1790 | memcpy(data, buf, err); | |
1791 | kfree(buf); | |
1792 | out: | |
1793 | return err; | |
1794 | } | |
877bd862 | 1795 | |
0547fad2 ML |
1796 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1797 | u16 value, u16 index, const void *data, | |
1798 | u16 size) | |
877bd862 ML |
1799 | { |
1800 | void *buf = NULL; | |
1801 | int err = -ENOMEM; | |
1802 | ||
1803 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1804 | " value=0x%04x index=0x%04x size=%d\n", | |
1805 | cmd, reqtype, value, index, size); | |
1806 | ||
1807 | if (data) { | |
1808 | buf = kmemdup(data, size, GFP_KERNEL); | |
1809 | if (!buf) | |
1810 | goto out; | |
1811 | } | |
1812 | ||
1813 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1814 | cmd, reqtype, value, index, buf, size, | |
1815 | USB_CTRL_SET_TIMEOUT); | |
1816 | kfree(buf); | |
1817 | ||
1818 | out: | |
1819 | return err; | |
1820 | } | |
0547fad2 ML |
1821 | |
1822 | /* | |
1823 | * The function can't be called inside suspend/resume callback, | |
1824 | * otherwise deadlock will be caused. | |
1825 | */ | |
1826 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1827 | u16 value, u16 index, void *data, u16 size) | |
1828 | { | |
6f0a0986 ML |
1829 | int ret; |
1830 | ||
1831 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1832 | return -ENODEV; | |
1833 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1834 | data, size); | |
1835 | usb_autopm_put_interface(dev->intf); | |
1836 | return ret; | |
0547fad2 ML |
1837 | } |
1838 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
1839 | ||
1840 | /* | |
1841 | * The function can't be called inside suspend/resume callback, | |
1842 | * otherwise deadlock will be caused. | |
1843 | */ | |
1844 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1845 | u16 value, u16 index, const void *data, u16 size) | |
1846 | { | |
6f0a0986 ML |
1847 | int ret; |
1848 | ||
1849 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1850 | return -ENODEV; | |
1851 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1852 | data, size); | |
1853 | usb_autopm_put_interface(dev->intf); | |
1854 | return ret; | |
0547fad2 | 1855 | } |
877bd862 ML |
1856 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
1857 | ||
0547fad2 ML |
1858 | /* |
1859 | * The function can be called inside suspend/resume callback safely | |
1860 | * and should only be called by suspend/resume callback generally. | |
1861 | */ | |
1862 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1863 | u16 value, u16 index, void *data, u16 size) | |
1864 | { | |
1865 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1866 | data, size); | |
1867 | } | |
1868 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
1869 | ||
1870 | /* | |
1871 | * The function can be called inside suspend/resume callback safely | |
1872 | * and should only be called by suspend/resume callback generally. | |
1873 | */ | |
1874 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1875 | u16 value, u16 index, const void *data, | |
1876 | u16 size) | |
1877 | { | |
1878 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1879 | data, size); | |
1880 | } | |
1881 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
1882 | ||
877bd862 ML |
1883 | static void usbnet_async_cmd_cb(struct urb *urb) |
1884 | { | |
1885 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
1886 | int status = urb->status; | |
1887 | ||
1888 | if (status < 0) | |
1889 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
1890 | __func__, status); | |
1891 | ||
1892 | kfree(req); | |
1893 | usb_free_urb(urb); | |
1894 | } | |
1895 | ||
0547fad2 ML |
1896 | /* |
1897 | * The caller must make sure that device can't be put into suspend | |
1898 | * state until the control URB completes. | |
1899 | */ | |
877bd862 ML |
1900 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
1901 | u16 value, u16 index, const void *data, u16 size) | |
1902 | { | |
1903 | struct usb_ctrlrequest *req = NULL; | |
1904 | struct urb *urb; | |
1905 | int err = -ENOMEM; | |
1906 | void *buf = NULL; | |
1907 | ||
1908 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1909 | " value=0x%04x index=0x%04x size=%d\n", | |
1910 | cmd, reqtype, value, index, size); | |
1911 | ||
1912 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1913 | if (!urb) { | |
1914 | netdev_err(dev->net, "Error allocating URB in" | |
1915 | " %s!\n", __func__); | |
1916 | goto fail; | |
1917 | } | |
1918 | ||
1919 | if (data) { | |
1920 | buf = kmemdup(data, size, GFP_ATOMIC); | |
1921 | if (!buf) { | |
1922 | netdev_err(dev->net, "Error allocating buffer" | |
1923 | " in %s!\n", __func__); | |
1924 | goto fail_free; | |
1925 | } | |
1926 | } | |
1927 | ||
1928 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
38673c82 | 1929 | if (!req) |
877bd862 | 1930 | goto fail_free_buf; |
877bd862 ML |
1931 | |
1932 | req->bRequestType = reqtype; | |
1933 | req->bRequest = cmd; | |
1934 | req->wValue = cpu_to_le16(value); | |
1935 | req->wIndex = cpu_to_le16(index); | |
1936 | req->wLength = cpu_to_le16(size); | |
1937 | ||
1938 | usb_fill_control_urb(urb, dev->udev, | |
1939 | usb_sndctrlpipe(dev->udev, 0), | |
1940 | (void *)req, buf, size, | |
1941 | usbnet_async_cmd_cb, req); | |
1942 | urb->transfer_flags |= URB_FREE_BUFFER; | |
1943 | ||
1944 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
1945 | if (err < 0) { | |
1946 | netdev_err(dev->net, "Error submitting the control" | |
1947 | " message: status=%d\n", err); | |
1948 | goto fail_free; | |
1949 | } | |
1950 | return 0; | |
1951 | ||
1952 | fail_free_buf: | |
1953 | kfree(buf); | |
1954 | fail_free: | |
1955 | kfree(req); | |
1956 | usb_free_urb(urb); | |
1957 | fail: | |
1958 | return err; | |
1959 | ||
1960 | } | |
1961 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
1962 | /*-------------------------------------------------------------------------*/ |
1963 | ||
f29fc259 | 1964 | static int __init usbnet_init(void) |
1da177e4 | 1965 | { |
c582a950 TF |
1966 | /* Compiler should optimize this out. */ |
1967 | BUILD_BUG_ON( | |
1968 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 1969 | |
c7e12ead | 1970 | eth_random_addr(node_id); |
cb1cebbe | 1971 | return 0; |
1da177e4 | 1972 | } |
f29fc259 | 1973 | module_init(usbnet_init); |
1da177e4 | 1974 | |
f29fc259 | 1975 | static void __exit usbnet_exit(void) |
1da177e4 | 1976 | { |
1da177e4 | 1977 | } |
f29fc259 | 1978 | module_exit(usbnet_exit); |
1da177e4 | 1979 | |
f29fc259 | 1980 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1981 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1982 | MODULE_LICENSE("GPL"); |