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Commit | Line | Data |
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1da177e4 | 1 | /* |
090ffa9d | 2 | * USB Network driver infrastructure |
f29fc259 | 3 | * Copyright (C) 2000-2005 by David Brownell |
1da177e4 | 4 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* | |
22 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
23 | * kinds of full and high speed networking devices: host-to-host cables, |
24 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 25 | * |
090ffa9d DB |
26 | * These devices usually differ in terms of control protocols (if they |
27 | * even have one!) and sometimes they define new framing to wrap or batch | |
28 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
29 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
30 | * issues can usefully be addressed by this framework. | |
31 | */ | |
1da177e4 LT |
32 | |
33 | // #define DEBUG // error path messages, extra info | |
34 | // #define VERBOSE // more; success messages | |
35 | ||
1da177e4 | 36 | #include <linux/module.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/etherdevice.h> | |
03ad032b | 40 | #include <linux/ctype.h> |
1da177e4 LT |
41 | #include <linux/ethtool.h> |
42 | #include <linux/workqueue.h> | |
43 | #include <linux/mii.h> | |
1da177e4 | 44 | #include <linux/usb.h> |
3692e94f | 45 | #include <linux/usb/usbnet.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
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 | ||
209 | if (!netif_running (dev->net)) | |
210 | return; | |
211 | ||
24ead299 | 212 | status = usb_submit_urb (urb, GFP_ATOMIC); |
213 | if (status != 0) | |
214 | netif_err(dev, timer, dev->net, | |
215 | "intr resubmit --> %d\n", status); | |
216 | } | |
1da177e4 LT |
217 | |
218 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
219 | { | |
220 | char *buf = NULL; | |
221 | unsigned pipe = 0; | |
222 | unsigned maxp; | |
223 | unsigned period; | |
224 | ||
225 | if (!dev->driver_info->status) | |
226 | return 0; | |
227 | ||
228 | pipe = usb_rcvintpipe (dev->udev, | |
229 | dev->status->desc.bEndpointAddress | |
230 | & USB_ENDPOINT_NUMBER_MASK); | |
231 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
232 | ||
233 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
234 | period = max ((int) dev->status->desc.bInterval, | |
235 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
236 | ||
e94b1766 | 237 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 238 | if (buf) { |
e94b1766 | 239 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
240 | if (!dev->interrupt) { |
241 | kfree (buf); | |
242 | return -ENOMEM; | |
243 | } else { | |
244 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
245 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 246 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
247 | dev_dbg(&intf->dev, |
248 | "status ep%din, %d bytes period %d\n", | |
249 | usb_pipeendpoint(pipe), maxp, period); | |
250 | } | |
251 | } | |
18ab458f | 252 | return 0; |
1da177e4 LT |
253 | } |
254 | ||
2e55cc72 DB |
255 | /* Passes this packet up the stack, updating its accounting. |
256 | * Some link protocols batch packets, so their rx_fixup paths | |
257 | * can return clones as well as just modify the original skb. | |
258 | */ | |
259 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
260 | { |
261 | int status; | |
262 | ||
7834ddbc JK |
263 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
264 | skb_queue_tail(&dev->rxq_pause, skb); | |
265 | return; | |
266 | } | |
267 | ||
1da177e4 | 268 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
269 | dev->net->stats.rx_packets++; |
270 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 271 | |
a475f603 JP |
272 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
273 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 274 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
275 | |
276 | if (skb_defer_rx_timestamp(skb)) | |
277 | return; | |
278 | ||
1da177e4 | 279 | status = netif_rx (skb); |
a475f603 JP |
280 | if (status != NET_RX_SUCCESS) |
281 | netif_dbg(dev, rx_err, dev->net, | |
282 | "netif_rx status %d\n", status); | |
1da177e4 | 283 | } |
2e55cc72 | 284 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 285 | |
1da177e4 LT |
286 | \f |
287 | /*------------------------------------------------------------------------- | |
288 | * | |
289 | * Network Device Driver (peer link to "Host Device", from USB host) | |
290 | * | |
291 | *-------------------------------------------------------------------------*/ | |
292 | ||
777baa47 | 293 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
294 | { |
295 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 296 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
297 | int old_hard_mtu = dev->hard_mtu; |
298 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 299 | |
a99c1949 | 300 | if (new_mtu <= 0) |
1da177e4 | 301 | return -EINVAL; |
1da177e4 | 302 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 303 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
304 | return -EDOM; |
305 | net->mtu = new_mtu; | |
a99c1949 JP |
306 | |
307 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
308 | if (dev->rx_urb_size == old_hard_mtu) { | |
309 | dev->rx_urb_size = dev->hard_mtu; | |
310 | if (dev->rx_urb_size > old_rx_urb_size) | |
311 | usbnet_unlink_rx_urbs(dev); | |
312 | } | |
313 | ||
1da177e4 LT |
314 | return 0; |
315 | } | |
777baa47 | 316 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 | 317 | |
5b6e9bcd ML |
318 | /* The caller must hold list->lock */ |
319 | static void __usbnet_queue_skb(struct sk_buff_head *list, | |
320 | struct sk_buff *newsk, enum skb_state state) | |
321 | { | |
322 | struct skb_data *entry = (struct skb_data *) newsk->cb; | |
323 | ||
324 | __skb_queue_tail(list, newsk); | |
325 | entry->state = state; | |
326 | } | |
327 | ||
1da177e4 LT |
328 | /*-------------------------------------------------------------------------*/ |
329 | ||
1da177e4 LT |
330 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
331 | * completion callbacks. 2.5 should have fixed those bugs... | |
332 | */ | |
333 | ||
5b6e9bcd ML |
334 | static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb, |
335 | struct sk_buff_head *list, enum skb_state state) | |
1da177e4 | 336 | { |
1da177e4 | 337 | unsigned long flags; |
5b6e9bcd ML |
338 | enum skb_state old_state; |
339 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1da177e4 | 340 | |
8728b834 | 341 | spin_lock_irqsave(&list->lock, flags); |
5b6e9bcd ML |
342 | old_state = entry->state; |
343 | entry->state = state; | |
8728b834 DM |
344 | __skb_unlink(skb, list); |
345 | spin_unlock(&list->lock); | |
346 | spin_lock(&dev->done.lock); | |
347 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 348 | if (dev->done.qlen == 1) |
8728b834 DM |
349 | tasklet_schedule(&dev->bh); |
350 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
5b6e9bcd | 351 | return old_state; |
1da177e4 LT |
352 | } |
353 | ||
354 | /* some work can't be done in tasklets, so we use keventd | |
355 | * | |
356 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
357 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
358 | */ | |
2e55cc72 | 359 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
360 | { |
361 | set_bit (work, &dev->flags); | |
362 | if (!schedule_work (&dev->kevent)) | |
60b86755 | 363 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); |
1da177e4 | 364 | else |
60b86755 | 365 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
1da177e4 | 366 | } |
2e55cc72 | 367 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
368 | |
369 | /*-------------------------------------------------------------------------*/ | |
370 | ||
7d12e780 | 371 | static void rx_complete (struct urb *urb); |
1da177e4 | 372 | |
dacb3975 | 373 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
374 | { |
375 | struct sk_buff *skb; | |
376 | struct skb_data *entry; | |
377 | int retval = 0; | |
378 | unsigned long lockflags; | |
2e55cc72 | 379 | size_t size = dev->rx_urb_size; |
1da177e4 | 380 | |
7bdd4027 ED |
381 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
382 | if (!skb) { | |
a475f603 | 383 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 384 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 385 | usb_free_urb (urb); |
dacb3975 | 386 | return -ENOMEM; |
1da177e4 | 387 | } |
1da177e4 LT |
388 | |
389 | entry = (struct skb_data *) skb->cb; | |
390 | entry->urb = urb; | |
391 | entry->dev = dev; | |
1da177e4 LT |
392 | entry->length = 0; |
393 | ||
394 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
395 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
396 | |
397 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
398 | ||
8e95a202 JP |
399 | if (netif_running (dev->net) && |
400 | netif_device_present (dev->net) && | |
69ee472f ON |
401 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
402 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 403 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 404 | case -EPIPE: |
2e55cc72 | 405 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
406 | break; |
407 | case -ENOMEM: | |
2e55cc72 | 408 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
409 | break; |
410 | case -ENODEV: | |
a475f603 | 411 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
412 | netif_device_detach (dev->net); |
413 | break; | |
dacb3975 DM |
414 | case -EHOSTUNREACH: |
415 | retval = -ENOLINK; | |
416 | break; | |
1da177e4 | 417 | default: |
a475f603 JP |
418 | netif_dbg(dev, rx_err, dev->net, |
419 | "rx submit, %d\n", retval); | |
1da177e4 LT |
420 | tasklet_schedule (&dev->bh); |
421 | break; | |
422 | case 0: | |
5b6e9bcd | 423 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
424 | } |
425 | } else { | |
a475f603 | 426 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
427 | retval = -ENOLINK; |
428 | } | |
429 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
430 | if (retval) { | |
431 | dev_kfree_skb_any (skb); | |
432 | usb_free_urb (urb); | |
433 | } | |
dacb3975 | 434 | return retval; |
1da177e4 LT |
435 | } |
436 | ||
437 | ||
438 | /*-------------------------------------------------------------------------*/ | |
439 | ||
440 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
441 | { | |
8e95a202 | 442 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
443 | !dev->driver_info->rx_fixup (dev, skb)) { |
444 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
445 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
446 | dev->net->stats.rx_errors++; | |
447 | goto done; | |
448 | } | |
1da177e4 LT |
449 | // else network stack removes extra byte if we forced a short packet |
450 | ||
073285fd AO |
451 | if (skb->len) { |
452 | /* all data was already cloned from skb inside the driver */ | |
453 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
454 | dev_kfree_skb_any(skb); | |
455 | else | |
456 | usbnet_skb_return(dev, skb); | |
457 | return; | |
1da177e4 | 458 | } |
073285fd AO |
459 | |
460 | netif_dbg(dev, rx_err, dev->net, "drop\n"); | |
073285fd | 461 | dev->net->stats.rx_errors++; |
7a635ea9 | 462 | done: |
073285fd | 463 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
464 | } |
465 | ||
466 | /*-------------------------------------------------------------------------*/ | |
467 | ||
7d12e780 | 468 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
469 | { |
470 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
471 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
472 | struct usbnet *dev = entry->dev; | |
473 | int urb_status = urb->status; | |
5b6e9bcd | 474 | enum skb_state state; |
1da177e4 LT |
475 | |
476 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 477 | state = rx_done; |
1da177e4 LT |
478 | entry->urb = NULL; |
479 | ||
480 | switch (urb_status) { | |
18ab458f DB |
481 | /* success */ |
482 | case 0: | |
f29fc259 | 483 | if (skb->len < dev->net->hard_header_len) { |
5b6e9bcd | 484 | state = rx_cleanup; |
7963837f HX |
485 | dev->net->stats.rx_errors++; |
486 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
487 | netif_dbg(dev, rx_err, dev->net, |
488 | "rx length %d\n", skb->len); | |
1da177e4 LT |
489 | } |
490 | break; | |
491 | ||
18ab458f DB |
492 | /* stalls need manual reset. this is rare ... except that |
493 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 494 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
495 | * storm, recovering as needed. |
496 | */ | |
497 | case -EPIPE: | |
7963837f | 498 | dev->net->stats.rx_errors++; |
2e55cc72 | 499 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
500 | // FALLTHROUGH |
501 | ||
18ab458f DB |
502 | /* software-driven interface shutdown */ |
503 | case -ECONNRESET: /* async unlink */ | |
504 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
505 | netif_dbg(dev, ifdown, dev->net, |
506 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
507 | goto block; |
508 | ||
18ab458f DB |
509 | /* we get controller i/o faults during khubd disconnect() delays. |
510 | * throttle down resubmits, to avoid log floods; just temporarily, | |
511 | * so we still recover when the fault isn't a khubd delay. | |
512 | */ | |
513 | case -EPROTO: | |
514 | case -ETIME: | |
515 | case -EILSEQ: | |
7963837f | 516 | dev->net->stats.rx_errors++; |
1da177e4 LT |
517 | if (!timer_pending (&dev->delay)) { |
518 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
519 | netif_dbg(dev, link, dev->net, |
520 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
521 | } |
522 | block: | |
5b6e9bcd | 523 | state = rx_cleanup; |
1da177e4 LT |
524 | entry->urb = urb; |
525 | urb = NULL; | |
526 | break; | |
527 | ||
18ab458f DB |
528 | /* data overrun ... flush fifo? */ |
529 | case -EOVERFLOW: | |
7963837f | 530 | dev->net->stats.rx_over_errors++; |
1da177e4 | 531 | // FALLTHROUGH |
cb1cebbe | 532 | |
18ab458f | 533 | default: |
5b6e9bcd | 534 | state = rx_cleanup; |
7963837f | 535 | dev->net->stats.rx_errors++; |
a475f603 | 536 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
537 | break; |
538 | } | |
539 | ||
5b6e9bcd | 540 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
541 | |
542 | if (urb) { | |
8e95a202 | 543 | if (netif_running (dev->net) && |
5b6e9bcd ML |
544 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
545 | state != unlink_start) { | |
1da177e4 | 546 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 547 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
548 | return; |
549 | } | |
550 | usb_free_urb (urb); | |
551 | } | |
a475f603 | 552 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
553 | } |
554 | ||
7834ddbc JK |
555 | /*-------------------------------------------------------------------------*/ |
556 | void usbnet_pause_rx(struct usbnet *dev) | |
557 | { | |
558 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
559 | ||
a475f603 | 560 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
561 | } |
562 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
563 | ||
564 | void usbnet_resume_rx(struct usbnet *dev) | |
565 | { | |
566 | struct sk_buff *skb; | |
567 | int num = 0; | |
568 | ||
569 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
570 | ||
571 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
572 | usbnet_skb_return(dev, skb); | |
573 | num++; | |
574 | } | |
575 | ||
576 | tasklet_schedule(&dev->bh); | |
577 | ||
a475f603 JP |
578 | netif_dbg(dev, rx_status, dev->net, |
579 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
580 | } |
581 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
582 | ||
583 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
584 | { | |
585 | skb_queue_purge(&dev->rxq_pause); | |
586 | } | |
587 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
588 | ||
1da177e4 LT |
589 | /*-------------------------------------------------------------------------*/ |
590 | ||
591 | // unlink pending rx/tx; completion handlers do all other cleanup | |
592 | ||
593 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
594 | { | |
595 | unsigned long flags; | |
5b6e9bcd | 596 | struct sk_buff *skb; |
1da177e4 LT |
597 | int count = 0; |
598 | ||
599 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 600 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
601 | struct skb_data *entry; |
602 | struct urb *urb; | |
603 | int retval; | |
604 | ||
5b6e9bcd ML |
605 | skb_queue_walk(q, skb) { |
606 | entry = (struct skb_data *) skb->cb; | |
607 | if (entry->state != unlink_start) | |
608 | goto found; | |
609 | } | |
610 | break; | |
611 | found: | |
612 | entry->state = unlink_start; | |
1da177e4 | 613 | urb = entry->urb; |
1da177e4 | 614 | |
0956a8c2 | 615 | /* |
616 | * Get reference count of the URB to avoid it to be | |
617 | * freed during usb_unlink_urb, which may trigger | |
618 | * use-after-free problem inside usb_unlink_urb since | |
619 | * usb_unlink_urb is always racing with .complete | |
620 | * handler(include defer_bh). | |
621 | */ | |
622 | usb_get_urb(urb); | |
4231d47e | 623 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
624 | // during some PM-driven resume scenarios, |
625 | // these (async) unlinks complete immediately | |
626 | retval = usb_unlink_urb (urb); | |
627 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 628 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
629 | else |
630 | count++; | |
0956a8c2 | 631 | usb_put_urb(urb); |
4231d47e | 632 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
633 | } |
634 | spin_unlock_irqrestore (&q->lock, flags); | |
635 | return count; | |
636 | } | |
637 | ||
a99c1949 JP |
638 | // Flush all pending rx urbs |
639 | // minidrivers may need to do this when the MTU changes | |
640 | ||
641 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
642 | { | |
643 | if (netif_running(dev->net)) { | |
644 | (void) unlink_urbs (dev, &dev->rxq); | |
645 | tasklet_schedule(&dev->bh); | |
646 | } | |
647 | } | |
648 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
649 | |
650 | /*-------------------------------------------------------------------------*/ | |
651 | ||
652 | // precondition: never called in_interrupt | |
69ee472f ON |
653 | static void usbnet_terminate_urbs(struct usbnet *dev) |
654 | { | |
655 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
656 | DECLARE_WAITQUEUE(wait, current); | |
657 | int temp; | |
658 | ||
659 | /* ensure there are no more active urbs */ | |
660 | add_wait_queue(&unlink_wakeup, &wait); | |
661 | set_current_state(TASK_UNINTERRUPTIBLE); | |
662 | dev->wait = &unlink_wakeup; | |
663 | temp = unlink_urbs(dev, &dev->txq) + | |
664 | unlink_urbs(dev, &dev->rxq); | |
665 | ||
666 | /* maybe wait for deletions to finish. */ | |
667 | while (!skb_queue_empty(&dev->rxq) | |
668 | && !skb_queue_empty(&dev->txq) | |
669 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 670 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 671 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
672 | netif_dbg(dev, ifdown, dev->net, |
673 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
674 | } |
675 | set_current_state(TASK_RUNNING); | |
676 | dev->wait = NULL; | |
677 | remove_wait_queue(&unlink_wakeup, &wait); | |
678 | } | |
1da177e4 | 679 | |
777baa47 | 680 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
681 | { |
682 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 683 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 684 | int retval; |
1da177e4 | 685 | |
75bd0cbd | 686 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
687 | netif_stop_queue (net); |
688 | ||
a475f603 | 689 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 690 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
691 | net->stats.rx_packets, net->stats.tx_packets, |
692 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 693 | |
a33e9e7f JK |
694 | /* allow minidriver to stop correctly (wireless devices to turn off |
695 | * radio etc) */ | |
696 | if (info->stop) { | |
697 | retval = info->stop(dev); | |
a475f603 JP |
698 | if (retval < 0) |
699 | netif_info(dev, ifdown, dev->net, | |
700 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
701 | retval, | |
702 | dev->udev->bus->bus_name, dev->udev->devpath, | |
703 | info->description); | |
a33e9e7f JK |
704 | } |
705 | ||
69ee472f ON |
706 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
707 | usbnet_terminate_urbs(dev); | |
1da177e4 LT |
708 | |
709 | usb_kill_urb(dev->interrupt); | |
710 | ||
7834ddbc JK |
711 | usbnet_purge_paused_rxq(dev); |
712 | ||
1da177e4 LT |
713 | /* deferred work (task, timer, softirq) must also stop. |
714 | * can't flush_scheduled_work() until we drop rtnl (later), | |
715 | * else workers could deadlock; so make workers a NOP. | |
716 | */ | |
717 | dev->flags = 0; | |
718 | del_timer_sync (&dev->delay); | |
719 | tasklet_kill (&dev->bh); | |
69ee472f ON |
720 | if (info->manage_power) |
721 | info->manage_power(dev, 0); | |
722 | else | |
723 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
724 | |
725 | return 0; | |
726 | } | |
777baa47 | 727 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
728 | |
729 | /*-------------------------------------------------------------------------*/ | |
730 | ||
731 | // posts reads, and enables write queuing | |
732 | ||
733 | // precondition: never called in_interrupt | |
734 | ||
777baa47 | 735 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
736 | { |
737 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 738 | int retval; |
1da177e4 LT |
739 | struct driver_info *info = dev->driver_info; |
740 | ||
a11a6544 | 741 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
742 | netif_info(dev, ifup, dev->net, |
743 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
744 | retval, | |
745 | dev->udev->bus->bus_name, | |
746 | dev->udev->devpath, | |
747 | info->description); | |
a11a6544 ON |
748 | goto done_nopm; |
749 | } | |
750 | ||
1da177e4 LT |
751 | // put into "known safe" state |
752 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
753 | netif_info(dev, ifup, dev->net, |
754 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
755 | retval, | |
756 | dev->udev->bus->bus_name, | |
757 | dev->udev->devpath, | |
758 | info->description); | |
1da177e4 LT |
759 | goto done; |
760 | } | |
761 | ||
762 | // insist peer be connected | |
763 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 764 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
765 | goto done; |
766 | } | |
767 | ||
768 | /* start any status interrupt transfer */ | |
769 | if (dev->interrupt) { | |
770 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
771 | if (retval < 0) { | |
a475f603 JP |
772 | netif_err(dev, ifup, dev->net, |
773 | "intr submit %d\n", retval); | |
1da177e4 LT |
774 | goto done; |
775 | } | |
776 | } | |
777 | ||
68972efa | 778 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 779 | netif_start_queue (net); |
a475f603 JP |
780 | netif_info(dev, ifup, dev->net, |
781 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
782 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
783 | dev->net->mtu, | |
784 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
785 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
786 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
787 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
788 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
789 | "simple"); | |
1da177e4 LT |
790 | |
791 | // delay posting reads until we're fully open | |
792 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
793 | if (info->manage_power) { |
794 | retval = info->manage_power(dev, 1); | |
795 | if (retval < 0) | |
fb13c47b | 796 | goto done_manage_power_error; |
69ee472f ON |
797 | usb_autopm_put_interface(dev->intf); |
798 | } | |
a11a6544 | 799 | return retval; |
a475f603 | 800 | |
fb13c47b ML |
801 | done_manage_power_error: |
802 | clear_bit(EVENT_DEV_OPEN, &dev->flags); | |
1da177e4 | 803 | done: |
a11a6544 ON |
804 | usb_autopm_put_interface(dev->intf); |
805 | done_nopm: | |
1da177e4 LT |
806 | return retval; |
807 | } | |
777baa47 | 808 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
809 | |
810 | /*-------------------------------------------------------------------------*/ | |
811 | ||
2e55cc72 DB |
812 | /* ethtool methods; minidrivers may need to add some more, but |
813 | * they'll probably want to use this base set. | |
814 | */ | |
815 | ||
c41286fd AB |
816 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
817 | { | |
818 | struct usbnet *dev = netdev_priv(net); | |
819 | ||
820 | if (!dev->mii.mdio_read) | |
821 | return -EOPNOTSUPP; | |
822 | ||
823 | return mii_ethtool_gset(&dev->mii, cmd); | |
824 | } | |
825 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
826 | ||
827 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
828 | { | |
829 | struct usbnet *dev = netdev_priv(net); | |
830 | int retval; | |
831 | ||
832 | if (!dev->mii.mdio_write) | |
833 | return -EOPNOTSUPP; | |
834 | ||
835 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
836 | ||
837 | /* link speed/duplex might have changed */ | |
838 | if (dev->driver_info->link_reset) | |
839 | dev->driver_info->link_reset(dev); | |
840 | ||
841 | return retval; | |
842 | ||
843 | } | |
844 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
845 | ||
c41286fd | 846 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
847 | { |
848 | struct usbnet *dev = netdev_priv(net); | |
849 | ||
f29fc259 | 850 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
851 | if (dev->driver_info->check_connect) |
852 | return dev->driver_info->check_connect (dev) == 0; | |
853 | ||
c41286fd AB |
854 | /* if the device has mii operations, use those */ |
855 | if (dev->mii.mdio_read) | |
856 | return mii_link_ok(&dev->mii); | |
857 | ||
05ffb3e2 BM |
858 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
859 | return ethtool_op_get_link(net); | |
1da177e4 | 860 | } |
c41286fd | 861 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 862 | |
18ee91fa | 863 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
864 | { |
865 | struct usbnet *dev = netdev_priv(net); | |
866 | ||
18ee91fa DB |
867 | if (!dev->mii.mdio_write) |
868 | return -EOPNOTSUPP; | |
869 | ||
870 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 871 | } |
18ee91fa | 872 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 873 | |
18ee91fa | 874 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
875 | { |
876 | struct usbnet *dev = netdev_priv(net); | |
877 | ||
86a2f415 PS |
878 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
879 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
880 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
881 | sizeof info->fw_version); |
882 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 883 | } |
18ee91fa | 884 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 885 | |
18ee91fa | 886 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
887 | { |
888 | struct usbnet *dev = netdev_priv(net); | |
889 | ||
18ee91fa DB |
890 | return dev->msg_enable; |
891 | } | |
892 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 893 | |
18ee91fa DB |
894 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
895 | { | |
896 | struct usbnet *dev = netdev_priv(net); | |
897 | ||
898 | dev->msg_enable = level; | |
c41286fd | 899 | } |
18ee91fa | 900 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 901 | |
2e55cc72 | 902 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 903 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
904 | .get_settings = usbnet_get_settings, |
905 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 906 | .get_link = usbnet_get_link, |
c41286fd | 907 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 908 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
909 | .get_msglevel = usbnet_get_msglevel, |
910 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 911 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 912 | }; |
1da177e4 LT |
913 | |
914 | /*-------------------------------------------------------------------------*/ | |
915 | ||
916 | /* work that cannot be done in interrupt context uses keventd. | |
917 | * | |
918 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
919 | * especially now that control transfers can be queued. | |
920 | */ | |
921 | static void | |
c4028958 | 922 | kevent (struct work_struct *work) |
1da177e4 | 923 | { |
c4028958 DH |
924 | struct usbnet *dev = |
925 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
926 | int status; |
927 | ||
928 | /* usb_clear_halt() needs a thread context */ | |
929 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
930 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
931 | status = usb_autopm_get_interface(dev->intf); |
932 | if (status < 0) | |
933 | goto fail_pipe; | |
1da177e4 | 934 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 935 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
936 | if (status < 0 && |
937 | status != -EPIPE && | |
938 | status != -ESHUTDOWN) { | |
1da177e4 | 939 | if (netif_msg_tx_err (dev)) |
69ee472f | 940 | fail_pipe: |
60b86755 JP |
941 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
942 | status); | |
1da177e4 LT |
943 | } else { |
944 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
945 | if (status != -ESHUTDOWN) |
946 | netif_wake_queue (dev->net); | |
1da177e4 LT |
947 | } |
948 | } | |
949 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
950 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
951 | status = usb_autopm_get_interface(dev->intf); |
952 | if (status < 0) | |
953 | goto fail_halt; | |
1da177e4 | 954 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 955 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
956 | if (status < 0 && |
957 | status != -EPIPE && | |
958 | status != -ESHUTDOWN) { | |
1da177e4 | 959 | if (netif_msg_rx_err (dev)) |
69ee472f | 960 | fail_halt: |
60b86755 JP |
961 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
962 | status); | |
1da177e4 LT |
963 | } else { |
964 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
965 | tasklet_schedule (&dev->bh); | |
966 | } | |
967 | } | |
968 | ||
969 | /* tasklet could resubmit itself forever if memory is tight */ | |
970 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
971 | struct urb *urb = NULL; | |
dacb3975 | 972 | int resched = 1; |
1da177e4 LT |
973 | |
974 | if (netif_running (dev->net)) | |
975 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
976 | else | |
977 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
978 | if (urb != NULL) { | |
979 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 980 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
981 | if (status < 0) { |
982 | usb_free_urb(urb); | |
69ee472f | 983 | goto fail_lowmem; |
ab60707f | 984 | } |
dacb3975 DM |
985 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
986 | resched = 0; | |
69ee472f ON |
987 | usb_autopm_put_interface(dev->intf); |
988 | fail_lowmem: | |
dacb3975 DM |
989 | if (resched) |
990 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
991 | } |
992 | } | |
993 | ||
7ea13c9c | 994 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 995 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
996 | int retval = 0; |
997 | ||
998 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
999 | status = usb_autopm_get_interface(dev->intf); |
1000 | if (status < 0) | |
1001 | goto skip_reset; | |
7ea13c9c | 1002 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1003 | usb_autopm_put_interface(dev->intf); |
1004 | skip_reset: | |
60b86755 JP |
1005 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1006 | retval, | |
1007 | dev->udev->bus->bus_name, | |
1008 | dev->udev->devpath, | |
1009 | info->description); | |
69ee472f ON |
1010 | } else { |
1011 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c DH |
1012 | } |
1013 | } | |
1014 | ||
1da177e4 | 1015 | if (dev->flags) |
60b86755 | 1016 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1017 | } |
1018 | ||
1019 | /*-------------------------------------------------------------------------*/ | |
1020 | ||
7d12e780 | 1021 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1022 | { |
1023 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1024 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1025 | struct usbnet *dev = entry->dev; | |
1026 | ||
1027 | if (urb->status == 0) { | |
073285fd AO |
1028 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
1029 | dev->net->stats.tx_packets++; | |
7963837f | 1030 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1031 | } else { |
7963837f | 1032 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1033 | |
1034 | switch (urb->status) { | |
1035 | case -EPIPE: | |
2e55cc72 | 1036 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1037 | break; |
1038 | ||
1039 | /* software-driven interface shutdown */ | |
1040 | case -ECONNRESET: // async unlink | |
1041 | case -ESHUTDOWN: // hardware gone | |
1042 | break; | |
1043 | ||
1044 | // like rx, tx gets controller i/o faults during khubd delays | |
1045 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
1046 | case -EPROTO: |
1047 | case -ETIME: | |
1048 | case -EILSEQ: | |
69ee472f | 1049 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1050 | if (!timer_pending (&dev->delay)) { |
1051 | mod_timer (&dev->delay, | |
1052 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1053 | netif_dbg(dev, link, dev->net, |
1054 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1055 | } |
1056 | netif_stop_queue (dev->net); | |
1057 | break; | |
1058 | default: | |
a475f603 JP |
1059 | netif_dbg(dev, tx_err, dev->net, |
1060 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1061 | break; |
1062 | } | |
1063 | } | |
1064 | ||
69ee472f | 1065 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1066 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | /*-------------------------------------------------------------------------*/ | |
1070 | ||
777baa47 | 1071 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1072 | { |
1073 | struct usbnet *dev = netdev_priv(net); | |
1074 | ||
1075 | unlink_urbs (dev, &dev->txq); | |
1076 | tasklet_schedule (&dev->bh); | |
1077 | ||
1078 | // FIXME: device recovery -- reset? | |
1079 | } | |
777baa47 | 1080 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1081 | |
1082 | /*-------------------------------------------------------------------------*/ | |
1083 | ||
25a79c41 SH |
1084 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1085 | struct net_device *net) | |
1da177e4 LT |
1086 | { |
1087 | struct usbnet *dev = netdev_priv(net); | |
1088 | int length; | |
1da177e4 LT |
1089 | struct urb *urb = NULL; |
1090 | struct skb_data *entry; | |
1091 | struct driver_info *info = dev->driver_info; | |
1092 | unsigned long flags; | |
25a79c41 | 1093 | int retval; |
1da177e4 | 1094 | |
23ba0799 KK |
1095 | if (skb) |
1096 | skb_tx_timestamp(skb); | |
f9b491ec | 1097 | |
1da177e4 LT |
1098 | // some devices want funky USB-level framing, for |
1099 | // win32 driver (usually) and/or hardware quirks | |
1100 | if (info->tx_fixup) { | |
1101 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1102 | if (!skb) { | |
073285fd AO |
1103 | if (netif_msg_tx_err(dev)) { |
1104 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); | |
1105 | goto drop; | |
1106 | } else { | |
1107 | /* cdc_ncm collected packet; waits for more */ | |
1108 | goto not_drop; | |
1109 | } | |
1da177e4 LT |
1110 | } |
1111 | } | |
1112 | length = skb->len; | |
1113 | ||
1114 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1115 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1116 | goto drop; |
1117 | } | |
1118 | ||
1119 | entry = (struct skb_data *) skb->cb; | |
1120 | entry->urb = urb; | |
1121 | entry->dev = dev; | |
1da177e4 LT |
1122 | entry->length = length; |
1123 | ||
1da177e4 LT |
1124 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1125 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1126 | |
1127 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1128 | * NOTE: strictly conforming cdc-ether devices should expect | |
1129 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1130 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1131 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1132 | * packet itself if needed. | |
1da177e4 | 1133 | */ |
b4d562e3 EP |
1134 | if (length % dev->maxpacket == 0) { |
1135 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd AO |
1136 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
1137 | urb->transfer_buffer_length++; | |
1138 | if (skb_tailroom(skb)) { | |
1139 | skb->data[skb->len] = 0; | |
1140 | __skb_put(skb, 1); | |
1141 | } | |
b4d562e3 EP |
1142 | } |
1143 | } else | |
1144 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1145 | } |
1da177e4 | 1146 | |
69ee472f ON |
1147 | spin_lock_irqsave(&dev->txq.lock, flags); |
1148 | retval = usb_autopm_get_interface_async(dev->intf); | |
1149 | if (retval < 0) { | |
1150 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1151 | goto drop; | |
1152 | } | |
1153 | ||
1154 | #ifdef CONFIG_PM | |
1155 | /* if this triggers the device is still a sleep */ | |
1156 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1157 | /* transmission will be done in resume */ | |
1158 | usb_anchor_urb(urb, &dev->deferred); | |
1159 | /* no use to process more packets */ | |
1160 | netif_stop_queue(net); | |
1161 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
60b86755 | 1162 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1163 | goto deferred; |
1164 | } | |
1165 | #endif | |
1da177e4 | 1166 | |
1da177e4 LT |
1167 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1168 | case -EPIPE: | |
1169 | netif_stop_queue (net); | |
2e55cc72 | 1170 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1171 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1172 | break; |
1173 | default: | |
69ee472f | 1174 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1175 | netif_dbg(dev, tx_err, dev->net, |
1176 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1177 | break; |
1178 | case 0: | |
1179 | net->trans_start = jiffies; | |
5b6e9bcd | 1180 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1181 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1182 | netif_stop_queue (net); | |
1183 | } | |
1184 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1185 | ||
1186 | if (retval) { | |
a475f603 | 1187 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1188 | drop: |
7963837f | 1189 | dev->net->stats.tx_dropped++; |
073285fd | 1190 | not_drop: |
1da177e4 LT |
1191 | if (skb) |
1192 | dev_kfree_skb_any (skb); | |
1193 | usb_free_urb (urb); | |
a475f603 JP |
1194 | } else |
1195 | netif_dbg(dev, tx_queued, dev->net, | |
1196 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1197 | #ifdef CONFIG_PM |
1198 | deferred: | |
1199 | #endif | |
25a79c41 | 1200 | return NETDEV_TX_OK; |
1da177e4 | 1201 | } |
777baa47 | 1202 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1203 | |
65841fd5 ML |
1204 | static void rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
1205 | { | |
1206 | struct urb *urb; | |
1207 | int i; | |
1208 | ||
1209 | /* don't refill the queue all at once */ | |
1210 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1211 | urb = usb_alloc_urb(0, flags); | |
1212 | if (urb != NULL) { | |
1213 | if (rx_submit(dev, urb, flags) == -ENOLINK) | |
1214 | return; | |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | ||
1da177e4 LT |
1219 | /*-------------------------------------------------------------------------*/ |
1220 | ||
1221 | // tasklet (work deferred from completions, in_irq) or timer | |
1222 | ||
1223 | static void usbnet_bh (unsigned long param) | |
1224 | { | |
1225 | struct usbnet *dev = (struct usbnet *) param; | |
1226 | struct sk_buff *skb; | |
1227 | struct skb_data *entry; | |
1228 | ||
1229 | while ((skb = skb_dequeue (&dev->done))) { | |
1230 | entry = (struct skb_data *) skb->cb; | |
1231 | switch (entry->state) { | |
18ab458f | 1232 | case rx_done: |
1da177e4 LT |
1233 | entry->state = rx_cleanup; |
1234 | rx_process (dev, skb); | |
1235 | continue; | |
18ab458f DB |
1236 | case tx_done: |
1237 | case rx_cleanup: | |
1da177e4 LT |
1238 | usb_free_urb (entry->urb); |
1239 | dev_kfree_skb (skb); | |
1240 | continue; | |
18ab458f | 1241 | default: |
60b86755 | 1242 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1243 | } |
1244 | } | |
1245 | ||
1246 | // waiting for all pending urbs to complete? | |
1247 | if (dev->wait) { | |
1248 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1249 | wake_up (dev->wait); | |
1250 | } | |
1251 | ||
1252 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1253 | } else if (netif_running (dev->net) && |
1254 | netif_device_present (dev->net) && | |
1255 | !timer_pending (&dev->delay) && | |
1256 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1257 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1258 | |
1259 | if (temp < RX_QLEN(dev)) { | |
1260 | rx_alloc_submit(dev, GFP_ATOMIC); | |
a475f603 JP |
1261 | if (temp != dev->rxq.qlen) |
1262 | netif_dbg(dev, link, dev->net, | |
1263 | "rxqlen %d --> %d\n", | |
1264 | temp, dev->rxq.qlen); | |
65841fd5 | 1265 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1266 | tasklet_schedule (&dev->bh); |
1267 | } | |
1268 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1269 | netif_wake_queue (dev->net); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | ||
1da177e4 LT |
1274 | /*------------------------------------------------------------------------- |
1275 | * | |
1276 | * USB Device Driver support | |
1277 | * | |
1278 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1279 | |
1da177e4 LT |
1280 | // precondition: never called in_interrupt |
1281 | ||
38bde1d4 | 1282 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1283 | { |
1284 | struct usbnet *dev; | |
1285 | struct usb_device *xdev; | |
1286 | struct net_device *net; | |
1287 | ||
1288 | dev = usb_get_intfdata(intf); | |
1289 | usb_set_intfdata(intf, NULL); | |
1290 | if (!dev) | |
1291 | return; | |
1292 | ||
1293 | xdev = interface_to_usbdev (intf); | |
1294 | ||
a475f603 JP |
1295 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1296 | intf->dev.driver->name, | |
1297 | xdev->bus->bus_name, xdev->devpath, | |
1298 | dev->driver_info->description); | |
cb1cebbe | 1299 | |
1da177e4 LT |
1300 | net = dev->net; |
1301 | unregister_netdev (net); | |
1302 | ||
23f333a2 | 1303 | cancel_work_sync(&dev->kevent); |
1da177e4 LT |
1304 | |
1305 | if (dev->driver_info->unbind) | |
1306 | dev->driver_info->unbind (dev, intf); | |
1307 | ||
68972efa PS |
1308 | usb_kill_urb(dev->interrupt); |
1309 | usb_free_urb(dev->interrupt); | |
1310 | ||
1da177e4 | 1311 | free_netdev(net); |
1da177e4 | 1312 | } |
38bde1d4 | 1313 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1314 | |
777baa47 SH |
1315 | static const struct net_device_ops usbnet_netdev_ops = { |
1316 | .ndo_open = usbnet_open, | |
1317 | .ndo_stop = usbnet_stop, | |
1318 | .ndo_start_xmit = usbnet_start_xmit, | |
1319 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1320 | .ndo_change_mtu = usbnet_change_mtu, | |
1321 | .ndo_set_mac_address = eth_mac_addr, | |
1322 | .ndo_validate_addr = eth_validate_addr, | |
1323 | }; | |
1da177e4 LT |
1324 | |
1325 | /*-------------------------------------------------------------------------*/ | |
1326 | ||
1da177e4 LT |
1327 | // precondition: never called in_interrupt |
1328 | ||
225794f8 MH |
1329 | static struct device_type wlan_type = { |
1330 | .name = "wlan", | |
1331 | }; | |
1332 | ||
1333 | static struct device_type wwan_type = { | |
1334 | .name = "wwan", | |
1335 | }; | |
1336 | ||
38bde1d4 | 1337 | int |
1da177e4 LT |
1338 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1339 | { | |
1340 | struct usbnet *dev; | |
cb1cebbe | 1341 | struct net_device *net; |
1da177e4 LT |
1342 | struct usb_host_interface *interface; |
1343 | struct driver_info *info; | |
1344 | struct usb_device *xdev; | |
1345 | int status; | |
296c0242 | 1346 | const char *name; |
b0786b43 ML |
1347 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1348 | ||
1349 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1350 | * for usb interface, otherwise usb_autopm_get_interface may return | |
1351 | * failure if USB_SUSPEND(RUNTIME_PM) is enabled. | |
1352 | */ | |
1353 | if (!driver->supports_autosuspend) { | |
1354 | driver->supports_autosuspend = 1; | |
1355 | pm_runtime_enable(&udev->dev); | |
1356 | } | |
1da177e4 | 1357 | |
296c0242 | 1358 | name = udev->dev.driver->name; |
1da177e4 LT |
1359 | info = (struct driver_info *) prod->driver_info; |
1360 | if (!info) { | |
296c0242 | 1361 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1362 | return -ENODEV; |
1363 | } | |
1364 | xdev = interface_to_usbdev (udev); | |
1365 | interface = udev->cur_altsetting; | |
1366 | ||
1da177e4 LT |
1367 | status = -ENOMEM; |
1368 | ||
1369 | // set up our own records | |
1370 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1371 | if (!net) |
1da177e4 | 1372 | goto out; |
1da177e4 | 1373 | |
0dacca73 BH |
1374 | /* netdev_printk() needs this so do it as early as possible */ |
1375 | SET_NETDEV_DEV(net, &udev->dev); | |
1376 | ||
1da177e4 LT |
1377 | dev = netdev_priv(net); |
1378 | dev->udev = xdev; | |
a11a6544 | 1379 | dev->intf = udev; |
1da177e4 | 1380 | dev->driver_info = info; |
296c0242 | 1381 | dev->driver_name = name; |
1da177e4 LT |
1382 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1383 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1384 | skb_queue_head_init (&dev->rxq); | |
1385 | skb_queue_head_init (&dev->txq); | |
1386 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1387 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1388 | dev->bh.func = usbnet_bh; |
1389 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1390 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1391 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1392 | dev->delay.function = usbnet_bh; |
1393 | dev->delay.data = (unsigned long) dev; | |
1394 | init_timer (&dev->delay); | |
a9fc6338 | 1395 | mutex_init (&dev->phy_mutex); |
1da177e4 | 1396 | |
1da177e4 LT |
1397 | dev->net = net; |
1398 | strcpy (net->name, "usb%d"); | |
1399 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1400 | ||
2e55cc72 DB |
1401 | /* rx and tx sides can use different message sizes; |
1402 | * bind() should set rx_urb_size in that case. | |
1403 | */ | |
1404 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1405 | #if 0 |
1406 | // dma_supported() is deeply broken on almost all architectures | |
1407 | // possible with some EHCI controllers | |
6a35528a | 1408 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1409 | net->features |= NETIF_F_HIGHDMA; |
1410 | #endif | |
1411 | ||
777baa47 | 1412 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1413 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1414 | net->ethtool_ops = &usbnet_ethtool_ops; |
1415 | ||
1416 | // allow device-specific bind/init procedures | |
1417 | // NOTE net->name still not usable ... | |
1418 | if (info->bind) { | |
1419 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1420 | if (status < 0) |
1421 | goto out1; | |
1422 | ||
1da177e4 LT |
1423 | // heuristic: "usb%d" for links we know are two-host, |
1424 | // else "eth%d" when there's reasonable doubt. userspace | |
1425 | // can rename the link if it knows better. | |
8e95a202 | 1426 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1427 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1428 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1429 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1430 | /* WLAN devices should always be named "wlan%d" */ |
1431 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1432 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1433 | /* WWAN devices should always be named "wwan%d" */ |
1434 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1435 | strcpy(net->name, "wwan%d"); | |
f29fc259 DB |
1436 | |
1437 | /* maybe the remote can't receive an Ethernet MTU */ | |
1438 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1439 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1440 | } else if (!info->in || !info->out) |
1441 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1442 | else { |
1443 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1444 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1445 | if (!(info->flags & FLAG_NO_SETINT)) | |
1446 | status = usb_set_interface (xdev, | |
1447 | interface->desc.bInterfaceNumber, | |
1448 | interface->desc.bAlternateSetting); | |
1449 | else | |
1450 | status = 0; | |
1451 | ||
1452 | } | |
9514bfe5 | 1453 | if (status >= 0 && dev->status) |
1da177e4 LT |
1454 | status = init_status (dev, udev); |
1455 | if (status < 0) | |
cb1cebbe | 1456 | goto out3; |
1da177e4 | 1457 | |
2e55cc72 DB |
1458 | if (!dev->rx_urb_size) |
1459 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1460 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1461 | |
225794f8 MH |
1462 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1463 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1464 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1465 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1466 | ||
1da177e4 LT |
1467 | status = register_netdev (net); |
1468 | if (status) | |
a4723848 | 1469 | goto out4; |
a475f603 JP |
1470 | netif_info(dev, probe, dev->net, |
1471 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1472 | udev->dev.driver->name, | |
1473 | xdev->bus->bus_name, xdev->devpath, | |
1474 | dev->driver_info->description, | |
1475 | net->dev_addr); | |
1da177e4 LT |
1476 | |
1477 | // ok, it's ready to go. | |
1478 | usb_set_intfdata (udev, dev); | |
1479 | ||
1da177e4 LT |
1480 | netif_device_attach (net); |
1481 | ||
37e8273c BH |
1482 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
1483 | netif_carrier_off(net); | |
1484 | ||
1da177e4 LT |
1485 | return 0; |
1486 | ||
a4723848 | 1487 | out4: |
1488 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1489 | out3: |
1490 | if (info->unbind) | |
1491 | info->unbind (dev, udev); | |
1492 | out1: | |
1493 | free_netdev(net); | |
1494 | out: | |
1da177e4 LT |
1495 | return status; |
1496 | } | |
38bde1d4 | 1497 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1498 | |
1499 | /*-------------------------------------------------------------------------*/ | |
1500 | ||
36433127 ON |
1501 | /* |
1502 | * suspend the whole driver as soon as the first interface is suspended | |
1503 | * resume only when the last interface is resumed | |
38bde1d4 | 1504 | */ |
1da177e4 | 1505 | |
38bde1d4 | 1506 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1507 | { |
1508 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1509 | |
36433127 | 1510 | if (!dev->suspend_count++) { |
69ee472f ON |
1511 | spin_lock_irq(&dev->txq.lock); |
1512 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1513 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1514 | dev->suspend_count--; |
69ee472f ON |
1515 | spin_unlock_irq(&dev->txq.lock); |
1516 | return -EBUSY; | |
1517 | } else { | |
1518 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1519 | spin_unlock_irq(&dev->txq.lock); | |
1520 | } | |
a11a6544 ON |
1521 | /* |
1522 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1523 | * having everything error out. |
1524 | */ | |
1525 | netif_device_detach (dev->net); | |
69ee472f ON |
1526 | usbnet_terminate_urbs(dev); |
1527 | usb_kill_urb(dev->interrupt); | |
1528 | ||
a11a6544 ON |
1529 | /* |
1530 | * reattach so runtime management can use and | |
1531 | * wake the device | |
1532 | */ | |
1533 | netif_device_attach (dev->net); | |
36433127 | 1534 | } |
1da177e4 LT |
1535 | return 0; |
1536 | } | |
38bde1d4 | 1537 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1538 | |
38bde1d4 | 1539 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1540 | { |
1541 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1542 | struct sk_buff *skb; |
1543 | struct urb *res; | |
1544 | int retval; | |
1545 | ||
1546 | if (!--dev->suspend_count) { | |
68972efa PS |
1547 | /* resume interrupt URBs */ |
1548 | if (dev->interrupt && test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1549 | usb_submit_urb(dev->interrupt, GFP_NOIO); | |
1550 | ||
69ee472f ON |
1551 | spin_lock_irq(&dev->txq.lock); |
1552 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1553 | ||
69ee472f ON |
1554 | skb = (struct sk_buff *)res->context; |
1555 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1556 | if (retval < 0) { | |
1557 | dev_kfree_skb_any(skb); | |
1558 | usb_free_urb(res); | |
1559 | usb_autopm_put_interface_async(dev->intf); | |
1560 | } else { | |
1561 | dev->net->trans_start = jiffies; | |
1562 | __skb_queue_tail(&dev->txq, skb); | |
1563 | } | |
1564 | } | |
1da177e4 | 1565 | |
69ee472f ON |
1566 | smp_mb(); |
1567 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1568 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1569 | |
1570 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
65841fd5 ML |
1571 | /* handle remote wakeup ASAP */ |
1572 | if (!dev->wait && | |
1573 | netif_device_present(dev->net) && | |
1574 | !timer_pending(&dev->delay) && | |
1575 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
1576 | rx_alloc_submit(dev, GFP_KERNEL); | |
1577 | ||
75bd0cbd | 1578 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1579 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1580 | tasklet_schedule (&dev->bh); |
1581 | } | |
69ee472f | 1582 | } |
1da177e4 LT |
1583 | return 0; |
1584 | } | |
38bde1d4 | 1585 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1586 | |
1da177e4 | 1587 | |
1da177e4 LT |
1588 | /*-------------------------------------------------------------------------*/ |
1589 | ||
f29fc259 | 1590 | static int __init usbnet_init(void) |
1da177e4 | 1591 | { |
c582a950 TF |
1592 | /* Compiler should optimize this out. */ |
1593 | BUILD_BUG_ON( | |
1594 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 LT |
1595 | |
1596 | random_ether_addr(node_id); | |
cb1cebbe | 1597 | return 0; |
1da177e4 | 1598 | } |
f29fc259 | 1599 | module_init(usbnet_init); |
1da177e4 | 1600 | |
f29fc259 | 1601 | static void __exit usbnet_exit(void) |
1da177e4 | 1602 | { |
1da177e4 | 1603 | } |
f29fc259 | 1604 | module_exit(usbnet_exit); |
1da177e4 | 1605 | |
f29fc259 | 1606 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1607 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1608 | MODULE_LICENSE("GPL"); |