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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 | ||
7d12e780 | 183 | static void intr_complete (struct urb *urb); |
1da177e4 LT |
184 | |
185 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
186 | { | |
187 | char *buf = NULL; | |
188 | unsigned pipe = 0; | |
189 | unsigned maxp; | |
190 | unsigned period; | |
191 | ||
192 | if (!dev->driver_info->status) | |
193 | return 0; | |
194 | ||
195 | pipe = usb_rcvintpipe (dev->udev, | |
196 | dev->status->desc.bEndpointAddress | |
197 | & USB_ENDPOINT_NUMBER_MASK); | |
198 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
199 | ||
200 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
201 | period = max ((int) dev->status->desc.bInterval, | |
202 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
203 | ||
e94b1766 | 204 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 205 | if (buf) { |
e94b1766 | 206 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
207 | if (!dev->interrupt) { |
208 | kfree (buf); | |
209 | return -ENOMEM; | |
210 | } else { | |
211 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
212 | buf, maxp, intr_complete, dev, period); | |
213 | dev_dbg(&intf->dev, | |
214 | "status ep%din, %d bytes period %d\n", | |
215 | usb_pipeendpoint(pipe), maxp, period); | |
216 | } | |
217 | } | |
18ab458f | 218 | return 0; |
1da177e4 LT |
219 | } |
220 | ||
2e55cc72 DB |
221 | /* Passes this packet up the stack, updating its accounting. |
222 | * Some link protocols batch packets, so their rx_fixup paths | |
223 | * can return clones as well as just modify the original skb. | |
224 | */ | |
225 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
226 | { |
227 | int status; | |
228 | ||
7834ddbc JK |
229 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
230 | skb_queue_tail(&dev->rxq_pause, skb); | |
231 | return; | |
232 | } | |
233 | ||
1da177e4 | 234 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
235 | dev->net->stats.rx_packets++; |
236 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 237 | |
a475f603 JP |
238 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
239 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 240 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
241 | |
242 | if (skb_defer_rx_timestamp(skb)) | |
243 | return; | |
244 | ||
1da177e4 | 245 | status = netif_rx (skb); |
a475f603 JP |
246 | if (status != NET_RX_SUCCESS) |
247 | netif_dbg(dev, rx_err, dev->net, | |
248 | "netif_rx status %d\n", status); | |
1da177e4 | 249 | } |
2e55cc72 | 250 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 251 | |
1da177e4 LT |
252 | \f |
253 | /*------------------------------------------------------------------------- | |
254 | * | |
255 | * Network Device Driver (peer link to "Host Device", from USB host) | |
256 | * | |
257 | *-------------------------------------------------------------------------*/ | |
258 | ||
777baa47 | 259 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
260 | { |
261 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 262 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
263 | int old_hard_mtu = dev->hard_mtu; |
264 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 265 | |
a99c1949 | 266 | if (new_mtu <= 0) |
1da177e4 | 267 | return -EINVAL; |
1da177e4 | 268 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 269 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
270 | return -EDOM; |
271 | net->mtu = new_mtu; | |
a99c1949 JP |
272 | |
273 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
274 | if (dev->rx_urb_size == old_hard_mtu) { | |
275 | dev->rx_urb_size = dev->hard_mtu; | |
276 | if (dev->rx_urb_size > old_rx_urb_size) | |
277 | usbnet_unlink_rx_urbs(dev); | |
278 | } | |
279 | ||
1da177e4 LT |
280 | return 0; |
281 | } | |
777baa47 | 282 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 LT |
283 | |
284 | /*-------------------------------------------------------------------------*/ | |
285 | ||
1da177e4 LT |
286 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
287 | * completion callbacks. 2.5 should have fixed those bugs... | |
288 | */ | |
289 | ||
8728b834 | 290 | static void defer_bh(struct usbnet *dev, struct sk_buff *skb, struct sk_buff_head *list) |
1da177e4 | 291 | { |
1da177e4 LT |
292 | unsigned long flags; |
293 | ||
8728b834 DM |
294 | spin_lock_irqsave(&list->lock, flags); |
295 | __skb_unlink(skb, list); | |
296 | spin_unlock(&list->lock); | |
297 | spin_lock(&dev->done.lock); | |
298 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 299 | if (dev->done.qlen == 1) |
8728b834 DM |
300 | tasklet_schedule(&dev->bh); |
301 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
1da177e4 LT |
302 | } |
303 | ||
304 | /* some work can't be done in tasklets, so we use keventd | |
305 | * | |
306 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
307 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
308 | */ | |
2e55cc72 | 309 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
310 | { |
311 | set_bit (work, &dev->flags); | |
312 | if (!schedule_work (&dev->kevent)) | |
60b86755 | 313 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); |
1da177e4 | 314 | else |
60b86755 | 315 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
1da177e4 | 316 | } |
2e55cc72 | 317 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
318 | |
319 | /*-------------------------------------------------------------------------*/ | |
320 | ||
7d12e780 | 321 | static void rx_complete (struct urb *urb); |
1da177e4 | 322 | |
dacb3975 | 323 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
324 | { |
325 | struct sk_buff *skb; | |
326 | struct skb_data *entry; | |
327 | int retval = 0; | |
328 | unsigned long lockflags; | |
2e55cc72 | 329 | size_t size = dev->rx_urb_size; |
1da177e4 | 330 | |
7bdd4027 ED |
331 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
332 | if (!skb) { | |
a475f603 | 333 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 334 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 335 | usb_free_urb (urb); |
dacb3975 | 336 | return -ENOMEM; |
1da177e4 | 337 | } |
1da177e4 LT |
338 | |
339 | entry = (struct skb_data *) skb->cb; | |
340 | entry->urb = urb; | |
341 | entry->dev = dev; | |
342 | entry->state = rx_start; | |
343 | entry->length = 0; | |
344 | ||
345 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
346 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
347 | |
348 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
349 | ||
8e95a202 JP |
350 | if (netif_running (dev->net) && |
351 | netif_device_present (dev->net) && | |
69ee472f ON |
352 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
353 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 354 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 355 | case -EPIPE: |
2e55cc72 | 356 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
357 | break; |
358 | case -ENOMEM: | |
2e55cc72 | 359 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
360 | break; |
361 | case -ENODEV: | |
a475f603 | 362 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
363 | netif_device_detach (dev->net); |
364 | break; | |
dacb3975 DM |
365 | case -EHOSTUNREACH: |
366 | retval = -ENOLINK; | |
367 | break; | |
1da177e4 | 368 | default: |
a475f603 JP |
369 | netif_dbg(dev, rx_err, dev->net, |
370 | "rx submit, %d\n", retval); | |
1da177e4 LT |
371 | tasklet_schedule (&dev->bh); |
372 | break; | |
373 | case 0: | |
374 | __skb_queue_tail (&dev->rxq, skb); | |
375 | } | |
376 | } else { | |
a475f603 | 377 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
378 | retval = -ENOLINK; |
379 | } | |
380 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
381 | if (retval) { | |
382 | dev_kfree_skb_any (skb); | |
383 | usb_free_urb (urb); | |
384 | } | |
dacb3975 | 385 | return retval; |
1da177e4 LT |
386 | } |
387 | ||
388 | ||
389 | /*-------------------------------------------------------------------------*/ | |
390 | ||
391 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
392 | { | |
8e95a202 | 393 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
394 | !dev->driver_info->rx_fixup (dev, skb)) { |
395 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
396 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
397 | dev->net->stats.rx_errors++; | |
398 | goto done; | |
399 | } | |
1da177e4 LT |
400 | // else network stack removes extra byte if we forced a short packet |
401 | ||
073285fd AO |
402 | if (skb->len) { |
403 | /* all data was already cloned from skb inside the driver */ | |
404 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
405 | dev_kfree_skb_any(skb); | |
406 | else | |
407 | usbnet_skb_return(dev, skb); | |
408 | return; | |
1da177e4 | 409 | } |
073285fd AO |
410 | |
411 | netif_dbg(dev, rx_err, dev->net, "drop\n"); | |
073285fd | 412 | dev->net->stats.rx_errors++; |
7a635ea9 | 413 | done: |
073285fd | 414 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
415 | } |
416 | ||
417 | /*-------------------------------------------------------------------------*/ | |
418 | ||
7d12e780 | 419 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
420 | { |
421 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
422 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
423 | struct usbnet *dev = entry->dev; | |
424 | int urb_status = urb->status; | |
425 | ||
426 | skb_put (skb, urb->actual_length); | |
427 | entry->state = rx_done; | |
428 | entry->urb = NULL; | |
429 | ||
430 | switch (urb_status) { | |
18ab458f DB |
431 | /* success */ |
432 | case 0: | |
f29fc259 | 433 | if (skb->len < dev->net->hard_header_len) { |
1da177e4 | 434 | entry->state = rx_cleanup; |
7963837f HX |
435 | dev->net->stats.rx_errors++; |
436 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
437 | netif_dbg(dev, rx_err, dev->net, |
438 | "rx length %d\n", skb->len); | |
1da177e4 LT |
439 | } |
440 | break; | |
441 | ||
18ab458f DB |
442 | /* stalls need manual reset. this is rare ... except that |
443 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 444 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
445 | * storm, recovering as needed. |
446 | */ | |
447 | case -EPIPE: | |
7963837f | 448 | dev->net->stats.rx_errors++; |
2e55cc72 | 449 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
450 | // FALLTHROUGH |
451 | ||
18ab458f DB |
452 | /* software-driven interface shutdown */ |
453 | case -ECONNRESET: /* async unlink */ | |
454 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
455 | netif_dbg(dev, ifdown, dev->net, |
456 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
457 | goto block; |
458 | ||
18ab458f DB |
459 | /* we get controller i/o faults during khubd disconnect() delays. |
460 | * throttle down resubmits, to avoid log floods; just temporarily, | |
461 | * so we still recover when the fault isn't a khubd delay. | |
462 | */ | |
463 | case -EPROTO: | |
464 | case -ETIME: | |
465 | case -EILSEQ: | |
7963837f | 466 | dev->net->stats.rx_errors++; |
1da177e4 LT |
467 | if (!timer_pending (&dev->delay)) { |
468 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
469 | netif_dbg(dev, link, dev->net, |
470 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
471 | } |
472 | block: | |
473 | entry->state = rx_cleanup; | |
474 | entry->urb = urb; | |
475 | urb = NULL; | |
476 | break; | |
477 | ||
18ab458f DB |
478 | /* data overrun ... flush fifo? */ |
479 | case -EOVERFLOW: | |
7963837f | 480 | dev->net->stats.rx_over_errors++; |
1da177e4 | 481 | // FALLTHROUGH |
cb1cebbe | 482 | |
18ab458f | 483 | default: |
1da177e4 | 484 | entry->state = rx_cleanup; |
7963837f | 485 | dev->net->stats.rx_errors++; |
a475f603 | 486 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
487 | break; |
488 | } | |
489 | ||
8728b834 | 490 | defer_bh(dev, skb, &dev->rxq); |
1da177e4 LT |
491 | |
492 | if (urb) { | |
8e95a202 JP |
493 | if (netif_running (dev->net) && |
494 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
495 | rx_submit (dev, urb, GFP_ATOMIC); |
496 | return; | |
497 | } | |
498 | usb_free_urb (urb); | |
499 | } | |
a475f603 | 500 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
501 | } |
502 | ||
7d12e780 | 503 | static void intr_complete (struct urb *urb) |
1da177e4 LT |
504 | { |
505 | struct usbnet *dev = urb->context; | |
506 | int status = urb->status; | |
507 | ||
508 | switch (status) { | |
18ab458f DB |
509 | /* success */ |
510 | case 0: | |
1da177e4 LT |
511 | dev->driver_info->status(dev, urb); |
512 | break; | |
513 | ||
18ab458f DB |
514 | /* software-driven interface shutdown */ |
515 | case -ENOENT: /* urb killed */ | |
516 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
517 | netif_dbg(dev, ifdown, dev->net, |
518 | "intr shutdown, code %d\n", status); | |
1da177e4 LT |
519 | return; |
520 | ||
18ab458f DB |
521 | /* NOTE: not throttling like RX/TX, since this endpoint |
522 | * already polls infrequently | |
523 | */ | |
524 | default: | |
60b86755 | 525 | netdev_dbg(dev->net, "intr status %d\n", status); |
1da177e4 LT |
526 | break; |
527 | } | |
528 | ||
529 | if (!netif_running (dev->net)) | |
530 | return; | |
531 | ||
532 | memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); | |
533 | status = usb_submit_urb (urb, GFP_ATOMIC); | |
a475f603 JP |
534 | if (status != 0) |
535 | netif_err(dev, timer, dev->net, | |
536 | "intr resubmit --> %d\n", status); | |
1da177e4 LT |
537 | } |
538 | ||
7834ddbc JK |
539 | /*-------------------------------------------------------------------------*/ |
540 | void usbnet_pause_rx(struct usbnet *dev) | |
541 | { | |
542 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
543 | ||
a475f603 | 544 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
545 | } |
546 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
547 | ||
548 | void usbnet_resume_rx(struct usbnet *dev) | |
549 | { | |
550 | struct sk_buff *skb; | |
551 | int num = 0; | |
552 | ||
553 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
554 | ||
555 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
556 | usbnet_skb_return(dev, skb); | |
557 | num++; | |
558 | } | |
559 | ||
560 | tasklet_schedule(&dev->bh); | |
561 | ||
a475f603 JP |
562 | netif_dbg(dev, rx_status, dev->net, |
563 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
564 | } |
565 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
566 | ||
567 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
568 | { | |
569 | skb_queue_purge(&dev->rxq_pause); | |
570 | } | |
571 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
572 | ||
1da177e4 LT |
573 | /*-------------------------------------------------------------------------*/ |
574 | ||
575 | // unlink pending rx/tx; completion handlers do all other cleanup | |
576 | ||
577 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
578 | { | |
579 | unsigned long flags; | |
580 | struct sk_buff *skb, *skbnext; | |
581 | int count = 0; | |
582 | ||
583 | spin_lock_irqsave (&q->lock, flags); | |
83bfba5f | 584 | skb_queue_walk_safe(q, skb, skbnext) { |
1da177e4 LT |
585 | struct skb_data *entry; |
586 | struct urb *urb; | |
587 | int retval; | |
588 | ||
589 | entry = (struct skb_data *) skb->cb; | |
590 | urb = entry->urb; | |
1da177e4 | 591 | |
0956a8c2 | 592 | /* |
593 | * Get reference count of the URB to avoid it to be | |
594 | * freed during usb_unlink_urb, which may trigger | |
595 | * use-after-free problem inside usb_unlink_urb since | |
596 | * usb_unlink_urb is always racing with .complete | |
597 | * handler(include defer_bh). | |
598 | */ | |
599 | usb_get_urb(urb); | |
4231d47e | 600 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
601 | // during some PM-driven resume scenarios, |
602 | // these (async) unlinks complete immediately | |
603 | retval = usb_unlink_urb (urb); | |
604 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 605 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
606 | else |
607 | count++; | |
0956a8c2 | 608 | usb_put_urb(urb); |
4231d47e | 609 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
610 | } |
611 | spin_unlock_irqrestore (&q->lock, flags); | |
612 | return count; | |
613 | } | |
614 | ||
a99c1949 JP |
615 | // Flush all pending rx urbs |
616 | // minidrivers may need to do this when the MTU changes | |
617 | ||
618 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
619 | { | |
620 | if (netif_running(dev->net)) { | |
621 | (void) unlink_urbs (dev, &dev->rxq); | |
622 | tasklet_schedule(&dev->bh); | |
623 | } | |
624 | } | |
625 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
626 | |
627 | /*-------------------------------------------------------------------------*/ | |
628 | ||
629 | // precondition: never called in_interrupt | |
69ee472f ON |
630 | static void usbnet_terminate_urbs(struct usbnet *dev) |
631 | { | |
632 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
633 | DECLARE_WAITQUEUE(wait, current); | |
634 | int temp; | |
635 | ||
636 | /* ensure there are no more active urbs */ | |
637 | add_wait_queue(&unlink_wakeup, &wait); | |
638 | set_current_state(TASK_UNINTERRUPTIBLE); | |
639 | dev->wait = &unlink_wakeup; | |
640 | temp = unlink_urbs(dev, &dev->txq) + | |
641 | unlink_urbs(dev, &dev->rxq); | |
642 | ||
643 | /* maybe wait for deletions to finish. */ | |
644 | while (!skb_queue_empty(&dev->rxq) | |
645 | && !skb_queue_empty(&dev->txq) | |
646 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 647 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 648 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
649 | netif_dbg(dev, ifdown, dev->net, |
650 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
651 | } |
652 | set_current_state(TASK_RUNNING); | |
653 | dev->wait = NULL; | |
654 | remove_wait_queue(&unlink_wakeup, &wait); | |
655 | } | |
1da177e4 | 656 | |
777baa47 | 657 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
658 | { |
659 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 660 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 661 | int retval; |
1da177e4 | 662 | |
75bd0cbd | 663 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
664 | netif_stop_queue (net); |
665 | ||
a475f603 | 666 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 667 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
668 | net->stats.rx_packets, net->stats.tx_packets, |
669 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 670 | |
a33e9e7f JK |
671 | /* allow minidriver to stop correctly (wireless devices to turn off |
672 | * radio etc) */ | |
673 | if (info->stop) { | |
674 | retval = info->stop(dev); | |
a475f603 JP |
675 | if (retval < 0) |
676 | netif_info(dev, ifdown, dev->net, | |
677 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
678 | retval, | |
679 | dev->udev->bus->bus_name, dev->udev->devpath, | |
680 | info->description); | |
a33e9e7f JK |
681 | } |
682 | ||
69ee472f ON |
683 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
684 | usbnet_terminate_urbs(dev); | |
1da177e4 LT |
685 | |
686 | usb_kill_urb(dev->interrupt); | |
687 | ||
7834ddbc JK |
688 | usbnet_purge_paused_rxq(dev); |
689 | ||
1da177e4 LT |
690 | /* deferred work (task, timer, softirq) must also stop. |
691 | * can't flush_scheduled_work() until we drop rtnl (later), | |
692 | * else workers could deadlock; so make workers a NOP. | |
693 | */ | |
694 | dev->flags = 0; | |
695 | del_timer_sync (&dev->delay); | |
696 | tasklet_kill (&dev->bh); | |
69ee472f ON |
697 | if (info->manage_power) |
698 | info->manage_power(dev, 0); | |
699 | else | |
700 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
701 | |
702 | return 0; | |
703 | } | |
777baa47 | 704 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
705 | |
706 | /*-------------------------------------------------------------------------*/ | |
707 | ||
708 | // posts reads, and enables write queuing | |
709 | ||
710 | // precondition: never called in_interrupt | |
711 | ||
777baa47 | 712 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
713 | { |
714 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 715 | int retval; |
1da177e4 LT |
716 | struct driver_info *info = dev->driver_info; |
717 | ||
a11a6544 | 718 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
719 | netif_info(dev, ifup, dev->net, |
720 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
721 | retval, | |
722 | dev->udev->bus->bus_name, | |
723 | dev->udev->devpath, | |
724 | info->description); | |
a11a6544 ON |
725 | goto done_nopm; |
726 | } | |
727 | ||
1da177e4 LT |
728 | // put into "known safe" state |
729 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
730 | netif_info(dev, ifup, dev->net, |
731 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
732 | retval, | |
733 | dev->udev->bus->bus_name, | |
734 | dev->udev->devpath, | |
735 | info->description); | |
1da177e4 LT |
736 | goto done; |
737 | } | |
738 | ||
739 | // insist peer be connected | |
740 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 741 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
742 | goto done; |
743 | } | |
744 | ||
745 | /* start any status interrupt transfer */ | |
746 | if (dev->interrupt) { | |
747 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
748 | if (retval < 0) { | |
a475f603 JP |
749 | netif_err(dev, ifup, dev->net, |
750 | "intr submit %d\n", retval); | |
1da177e4 LT |
751 | goto done; |
752 | } | |
753 | } | |
754 | ||
68972efa | 755 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 756 | netif_start_queue (net); |
a475f603 JP |
757 | netif_info(dev, ifup, dev->net, |
758 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
759 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
760 | dev->net->mtu, | |
761 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
762 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
763 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
764 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
765 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
766 | "simple"); | |
1da177e4 LT |
767 | |
768 | // delay posting reads until we're fully open | |
769 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
770 | if (info->manage_power) { |
771 | retval = info->manage_power(dev, 1); | |
772 | if (retval < 0) | |
773 | goto done; | |
774 | usb_autopm_put_interface(dev->intf); | |
775 | } | |
a11a6544 | 776 | return retval; |
a475f603 | 777 | |
1da177e4 | 778 | done: |
a11a6544 ON |
779 | usb_autopm_put_interface(dev->intf); |
780 | done_nopm: | |
1da177e4 LT |
781 | return retval; |
782 | } | |
777baa47 | 783 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
784 | |
785 | /*-------------------------------------------------------------------------*/ | |
786 | ||
2e55cc72 DB |
787 | /* ethtool methods; minidrivers may need to add some more, but |
788 | * they'll probably want to use this base set. | |
789 | */ | |
790 | ||
c41286fd AB |
791 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
792 | { | |
793 | struct usbnet *dev = netdev_priv(net); | |
794 | ||
795 | if (!dev->mii.mdio_read) | |
796 | return -EOPNOTSUPP; | |
797 | ||
798 | return mii_ethtool_gset(&dev->mii, cmd); | |
799 | } | |
800 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
801 | ||
802 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
803 | { | |
804 | struct usbnet *dev = netdev_priv(net); | |
805 | int retval; | |
806 | ||
807 | if (!dev->mii.mdio_write) | |
808 | return -EOPNOTSUPP; | |
809 | ||
810 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
811 | ||
812 | /* link speed/duplex might have changed */ | |
813 | if (dev->driver_info->link_reset) | |
814 | dev->driver_info->link_reset(dev); | |
815 | ||
816 | return retval; | |
817 | ||
818 | } | |
819 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
820 | ||
c41286fd | 821 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
822 | { |
823 | struct usbnet *dev = netdev_priv(net); | |
824 | ||
f29fc259 | 825 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
826 | if (dev->driver_info->check_connect) |
827 | return dev->driver_info->check_connect (dev) == 0; | |
828 | ||
c41286fd AB |
829 | /* if the device has mii operations, use those */ |
830 | if (dev->mii.mdio_read) | |
831 | return mii_link_ok(&dev->mii); | |
832 | ||
05ffb3e2 BM |
833 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
834 | return ethtool_op_get_link(net); | |
1da177e4 | 835 | } |
c41286fd | 836 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 837 | |
18ee91fa | 838 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
839 | { |
840 | struct usbnet *dev = netdev_priv(net); | |
841 | ||
18ee91fa DB |
842 | if (!dev->mii.mdio_write) |
843 | return -EOPNOTSUPP; | |
844 | ||
845 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 846 | } |
18ee91fa | 847 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 848 | |
18ee91fa | 849 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
850 | { |
851 | struct usbnet *dev = netdev_priv(net); | |
852 | ||
296c0242 | 853 | strncpy (info->driver, dev->driver_name, sizeof info->driver); |
18ee91fa DB |
854 | strncpy (info->version, DRIVER_VERSION, sizeof info->version); |
855 | strncpy (info->fw_version, dev->driver_info->description, | |
856 | sizeof info->fw_version); | |
857 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 858 | } |
18ee91fa | 859 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 860 | |
18ee91fa | 861 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
862 | { |
863 | struct usbnet *dev = netdev_priv(net); | |
864 | ||
18ee91fa DB |
865 | return dev->msg_enable; |
866 | } | |
867 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 868 | |
18ee91fa DB |
869 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
870 | { | |
871 | struct usbnet *dev = netdev_priv(net); | |
872 | ||
873 | dev->msg_enable = level; | |
c41286fd | 874 | } |
18ee91fa | 875 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 876 | |
2e55cc72 | 877 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 878 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
879 | .get_settings = usbnet_get_settings, |
880 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 881 | .get_link = usbnet_get_link, |
c41286fd | 882 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 883 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
884 | .get_msglevel = usbnet_get_msglevel, |
885 | .set_msglevel = usbnet_set_msglevel, | |
886 | }; | |
1da177e4 LT |
887 | |
888 | /*-------------------------------------------------------------------------*/ | |
889 | ||
890 | /* work that cannot be done in interrupt context uses keventd. | |
891 | * | |
892 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
893 | * especially now that control transfers can be queued. | |
894 | */ | |
895 | static void | |
c4028958 | 896 | kevent (struct work_struct *work) |
1da177e4 | 897 | { |
c4028958 DH |
898 | struct usbnet *dev = |
899 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
900 | int status; |
901 | ||
902 | /* usb_clear_halt() needs a thread context */ | |
903 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
904 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
905 | status = usb_autopm_get_interface(dev->intf); |
906 | if (status < 0) | |
907 | goto fail_pipe; | |
1da177e4 | 908 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 909 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
910 | if (status < 0 && |
911 | status != -EPIPE && | |
912 | status != -ESHUTDOWN) { | |
1da177e4 | 913 | if (netif_msg_tx_err (dev)) |
69ee472f | 914 | fail_pipe: |
60b86755 JP |
915 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
916 | status); | |
1da177e4 LT |
917 | } else { |
918 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
919 | if (status != -ESHUTDOWN) |
920 | netif_wake_queue (dev->net); | |
1da177e4 LT |
921 | } |
922 | } | |
923 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
924 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
925 | status = usb_autopm_get_interface(dev->intf); |
926 | if (status < 0) | |
927 | goto fail_halt; | |
1da177e4 | 928 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 929 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
930 | if (status < 0 && |
931 | status != -EPIPE && | |
932 | status != -ESHUTDOWN) { | |
1da177e4 | 933 | if (netif_msg_rx_err (dev)) |
69ee472f | 934 | fail_halt: |
60b86755 JP |
935 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
936 | status); | |
1da177e4 LT |
937 | } else { |
938 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
939 | tasklet_schedule (&dev->bh); | |
940 | } | |
941 | } | |
942 | ||
943 | /* tasklet could resubmit itself forever if memory is tight */ | |
944 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
945 | struct urb *urb = NULL; | |
dacb3975 | 946 | int resched = 1; |
1da177e4 LT |
947 | |
948 | if (netif_running (dev->net)) | |
949 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
950 | else | |
951 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
952 | if (urb != NULL) { | |
953 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 954 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
955 | if (status < 0) { |
956 | usb_free_urb(urb); | |
69ee472f | 957 | goto fail_lowmem; |
ab60707f | 958 | } |
dacb3975 DM |
959 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
960 | resched = 0; | |
69ee472f ON |
961 | usb_autopm_put_interface(dev->intf); |
962 | fail_lowmem: | |
dacb3975 DM |
963 | if (resched) |
964 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
965 | } |
966 | } | |
967 | ||
7ea13c9c | 968 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 969 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
970 | int retval = 0; |
971 | ||
972 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
973 | status = usb_autopm_get_interface(dev->intf); |
974 | if (status < 0) | |
975 | goto skip_reset; | |
7ea13c9c | 976 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
977 | usb_autopm_put_interface(dev->intf); |
978 | skip_reset: | |
60b86755 JP |
979 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
980 | retval, | |
981 | dev->udev->bus->bus_name, | |
982 | dev->udev->devpath, | |
983 | info->description); | |
69ee472f ON |
984 | } else { |
985 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c DH |
986 | } |
987 | } | |
988 | ||
1da177e4 | 989 | if (dev->flags) |
60b86755 | 990 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
991 | } |
992 | ||
993 | /*-------------------------------------------------------------------------*/ | |
994 | ||
7d12e780 | 995 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
996 | { |
997 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
998 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
999 | struct usbnet *dev = entry->dev; | |
1000 | ||
1001 | if (urb->status == 0) { | |
073285fd AO |
1002 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
1003 | dev->net->stats.tx_packets++; | |
7963837f | 1004 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1005 | } else { |
7963837f | 1006 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1007 | |
1008 | switch (urb->status) { | |
1009 | case -EPIPE: | |
2e55cc72 | 1010 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1011 | break; |
1012 | ||
1013 | /* software-driven interface shutdown */ | |
1014 | case -ECONNRESET: // async unlink | |
1015 | case -ESHUTDOWN: // hardware gone | |
1016 | break; | |
1017 | ||
1018 | // like rx, tx gets controller i/o faults during khubd delays | |
1019 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
1020 | case -EPROTO: |
1021 | case -ETIME: | |
1022 | case -EILSEQ: | |
69ee472f | 1023 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1024 | if (!timer_pending (&dev->delay)) { |
1025 | mod_timer (&dev->delay, | |
1026 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1027 | netif_dbg(dev, link, dev->net, |
1028 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1029 | } |
1030 | netif_stop_queue (dev->net); | |
1031 | break; | |
1032 | default: | |
a475f603 JP |
1033 | netif_dbg(dev, tx_err, dev->net, |
1034 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1035 | break; |
1036 | } | |
1037 | } | |
1038 | ||
69ee472f | 1039 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 | 1040 | entry->state = tx_done; |
8728b834 | 1041 | defer_bh(dev, skb, &dev->txq); |
1da177e4 LT |
1042 | } |
1043 | ||
1044 | /*-------------------------------------------------------------------------*/ | |
1045 | ||
777baa47 | 1046 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1047 | { |
1048 | struct usbnet *dev = netdev_priv(net); | |
1049 | ||
1050 | unlink_urbs (dev, &dev->txq); | |
1051 | tasklet_schedule (&dev->bh); | |
1052 | ||
1053 | // FIXME: device recovery -- reset? | |
1054 | } | |
777baa47 | 1055 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1056 | |
1057 | /*-------------------------------------------------------------------------*/ | |
1058 | ||
25a79c41 SH |
1059 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1060 | struct net_device *net) | |
1da177e4 LT |
1061 | { |
1062 | struct usbnet *dev = netdev_priv(net); | |
1063 | int length; | |
1da177e4 LT |
1064 | struct urb *urb = NULL; |
1065 | struct skb_data *entry; | |
1066 | struct driver_info *info = dev->driver_info; | |
1067 | unsigned long flags; | |
25a79c41 | 1068 | int retval; |
1da177e4 | 1069 | |
23ba0799 KK |
1070 | if (skb) |
1071 | skb_tx_timestamp(skb); | |
f9b491ec | 1072 | |
1da177e4 LT |
1073 | // some devices want funky USB-level framing, for |
1074 | // win32 driver (usually) and/or hardware quirks | |
1075 | if (info->tx_fixup) { | |
1076 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1077 | if (!skb) { | |
073285fd AO |
1078 | if (netif_msg_tx_err(dev)) { |
1079 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); | |
1080 | goto drop; | |
1081 | } else { | |
1082 | /* cdc_ncm collected packet; waits for more */ | |
1083 | goto not_drop; | |
1084 | } | |
1da177e4 LT |
1085 | } |
1086 | } | |
1087 | length = skb->len; | |
1088 | ||
1089 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1090 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1091 | goto drop; |
1092 | } | |
1093 | ||
1094 | entry = (struct skb_data *) skb->cb; | |
1095 | entry->urb = urb; | |
1096 | entry->dev = dev; | |
1097 | entry->state = tx_start; | |
1098 | entry->length = length; | |
1099 | ||
1da177e4 LT |
1100 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1101 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1102 | |
1103 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1104 | * NOTE: strictly conforming cdc-ether devices should expect | |
1105 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1106 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1107 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1108 | * packet itself if needed. | |
1da177e4 | 1109 | */ |
b4d562e3 EP |
1110 | if (length % dev->maxpacket == 0) { |
1111 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd AO |
1112 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
1113 | urb->transfer_buffer_length++; | |
1114 | if (skb_tailroom(skb)) { | |
1115 | skb->data[skb->len] = 0; | |
1116 | __skb_put(skb, 1); | |
1117 | } | |
b4d562e3 EP |
1118 | } |
1119 | } else | |
1120 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1121 | } |
1da177e4 | 1122 | |
69ee472f ON |
1123 | spin_lock_irqsave(&dev->txq.lock, flags); |
1124 | retval = usb_autopm_get_interface_async(dev->intf); | |
1125 | if (retval < 0) { | |
1126 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1127 | goto drop; | |
1128 | } | |
1129 | ||
1130 | #ifdef CONFIG_PM | |
1131 | /* if this triggers the device is still a sleep */ | |
1132 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1133 | /* transmission will be done in resume */ | |
1134 | usb_anchor_urb(urb, &dev->deferred); | |
1135 | /* no use to process more packets */ | |
1136 | netif_stop_queue(net); | |
1137 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
60b86755 | 1138 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1139 | goto deferred; |
1140 | } | |
1141 | #endif | |
1da177e4 | 1142 | |
1da177e4 LT |
1143 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1144 | case -EPIPE: | |
1145 | netif_stop_queue (net); | |
2e55cc72 | 1146 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1147 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1148 | break; |
1149 | default: | |
69ee472f | 1150 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1151 | netif_dbg(dev, tx_err, dev->net, |
1152 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1153 | break; |
1154 | case 0: | |
1155 | net->trans_start = jiffies; | |
1156 | __skb_queue_tail (&dev->txq, skb); | |
1157 | if (dev->txq.qlen >= TX_QLEN (dev)) | |
1158 | netif_stop_queue (net); | |
1159 | } | |
1160 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1161 | ||
1162 | if (retval) { | |
a475f603 | 1163 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1164 | drop: |
7963837f | 1165 | dev->net->stats.tx_dropped++; |
073285fd | 1166 | not_drop: |
1da177e4 LT |
1167 | if (skb) |
1168 | dev_kfree_skb_any (skb); | |
1169 | usb_free_urb (urb); | |
a475f603 JP |
1170 | } else |
1171 | netif_dbg(dev, tx_queued, dev->net, | |
1172 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1173 | #ifdef CONFIG_PM |
1174 | deferred: | |
1175 | #endif | |
25a79c41 | 1176 | return NETDEV_TX_OK; |
1da177e4 | 1177 | } |
777baa47 | 1178 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 LT |
1179 | |
1180 | /*-------------------------------------------------------------------------*/ | |
1181 | ||
1182 | // tasklet (work deferred from completions, in_irq) or timer | |
1183 | ||
1184 | static void usbnet_bh (unsigned long param) | |
1185 | { | |
1186 | struct usbnet *dev = (struct usbnet *) param; | |
1187 | struct sk_buff *skb; | |
1188 | struct skb_data *entry; | |
1189 | ||
1190 | while ((skb = skb_dequeue (&dev->done))) { | |
1191 | entry = (struct skb_data *) skb->cb; | |
1192 | switch (entry->state) { | |
18ab458f | 1193 | case rx_done: |
1da177e4 LT |
1194 | entry->state = rx_cleanup; |
1195 | rx_process (dev, skb); | |
1196 | continue; | |
18ab458f DB |
1197 | case tx_done: |
1198 | case rx_cleanup: | |
1da177e4 LT |
1199 | usb_free_urb (entry->urb); |
1200 | dev_kfree_skb (skb); | |
1201 | continue; | |
18ab458f | 1202 | default: |
60b86755 | 1203 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1204 | } |
1205 | } | |
1206 | ||
1207 | // waiting for all pending urbs to complete? | |
1208 | if (dev->wait) { | |
1209 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1210 | wake_up (dev->wait); | |
1211 | } | |
1212 | ||
1213 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1214 | } else if (netif_running (dev->net) && |
1215 | netif_device_present (dev->net) && | |
1216 | !timer_pending (&dev->delay) && | |
1217 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 LT |
1218 | int temp = dev->rxq.qlen; |
1219 | int qlen = RX_QLEN (dev); | |
1220 | ||
1221 | if (temp < qlen) { | |
1222 | struct urb *urb; | |
1223 | int i; | |
1224 | ||
1225 | // don't refill the queue all at once | |
1226 | for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { | |
1227 | urb = usb_alloc_urb (0, GFP_ATOMIC); | |
dacb3975 DM |
1228 | if (urb != NULL) { |
1229 | if (rx_submit (dev, urb, GFP_ATOMIC) == | |
1230 | -ENOLINK) | |
1231 | return; | |
1232 | } | |
1da177e4 | 1233 | } |
a475f603 JP |
1234 | if (temp != dev->rxq.qlen) |
1235 | netif_dbg(dev, link, dev->net, | |
1236 | "rxqlen %d --> %d\n", | |
1237 | temp, dev->rxq.qlen); | |
1da177e4 LT |
1238 | if (dev->rxq.qlen < qlen) |
1239 | tasklet_schedule (&dev->bh); | |
1240 | } | |
1241 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1242 | netif_wake_queue (dev->net); | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | ||
1da177e4 LT |
1247 | /*------------------------------------------------------------------------- |
1248 | * | |
1249 | * USB Device Driver support | |
1250 | * | |
1251 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1252 | |
1da177e4 LT |
1253 | // precondition: never called in_interrupt |
1254 | ||
38bde1d4 | 1255 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1256 | { |
1257 | struct usbnet *dev; | |
1258 | struct usb_device *xdev; | |
1259 | struct net_device *net; | |
1260 | ||
1261 | dev = usb_get_intfdata(intf); | |
1262 | usb_set_intfdata(intf, NULL); | |
1263 | if (!dev) | |
1264 | return; | |
1265 | ||
1266 | xdev = interface_to_usbdev (intf); | |
1267 | ||
a475f603 JP |
1268 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1269 | intf->dev.driver->name, | |
1270 | xdev->bus->bus_name, xdev->devpath, | |
1271 | dev->driver_info->description); | |
cb1cebbe | 1272 | |
1da177e4 LT |
1273 | net = dev->net; |
1274 | unregister_netdev (net); | |
1275 | ||
23f333a2 | 1276 | cancel_work_sync(&dev->kevent); |
1da177e4 LT |
1277 | |
1278 | if (dev->driver_info->unbind) | |
1279 | dev->driver_info->unbind (dev, intf); | |
1280 | ||
68972efa PS |
1281 | usb_kill_urb(dev->interrupt); |
1282 | usb_free_urb(dev->interrupt); | |
1283 | ||
1da177e4 LT |
1284 | free_netdev(net); |
1285 | usb_put_dev (xdev); | |
1286 | } | |
38bde1d4 | 1287 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1288 | |
777baa47 SH |
1289 | static const struct net_device_ops usbnet_netdev_ops = { |
1290 | .ndo_open = usbnet_open, | |
1291 | .ndo_stop = usbnet_stop, | |
1292 | .ndo_start_xmit = usbnet_start_xmit, | |
1293 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1294 | .ndo_change_mtu = usbnet_change_mtu, | |
1295 | .ndo_set_mac_address = eth_mac_addr, | |
1296 | .ndo_validate_addr = eth_validate_addr, | |
1297 | }; | |
1da177e4 LT |
1298 | |
1299 | /*-------------------------------------------------------------------------*/ | |
1300 | ||
1da177e4 LT |
1301 | // precondition: never called in_interrupt |
1302 | ||
225794f8 MH |
1303 | static struct device_type wlan_type = { |
1304 | .name = "wlan", | |
1305 | }; | |
1306 | ||
1307 | static struct device_type wwan_type = { | |
1308 | .name = "wwan", | |
1309 | }; | |
1310 | ||
38bde1d4 | 1311 | int |
1da177e4 LT |
1312 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1313 | { | |
1314 | struct usbnet *dev; | |
cb1cebbe | 1315 | struct net_device *net; |
1da177e4 LT |
1316 | struct usb_host_interface *interface; |
1317 | struct driver_info *info; | |
1318 | struct usb_device *xdev; | |
1319 | int status; | |
296c0242 | 1320 | const char *name; |
b0786b43 ML |
1321 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1322 | ||
1323 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1324 | * for usb interface, otherwise usb_autopm_get_interface may return | |
1325 | * failure if USB_SUSPEND(RUNTIME_PM) is enabled. | |
1326 | */ | |
1327 | if (!driver->supports_autosuspend) { | |
1328 | driver->supports_autosuspend = 1; | |
1329 | pm_runtime_enable(&udev->dev); | |
1330 | } | |
1da177e4 | 1331 | |
296c0242 | 1332 | name = udev->dev.driver->name; |
1da177e4 LT |
1333 | info = (struct driver_info *) prod->driver_info; |
1334 | if (!info) { | |
296c0242 | 1335 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1336 | return -ENODEV; |
1337 | } | |
1338 | xdev = interface_to_usbdev (udev); | |
1339 | interface = udev->cur_altsetting; | |
1340 | ||
1341 | usb_get_dev (xdev); | |
1342 | ||
1343 | status = -ENOMEM; | |
1344 | ||
1345 | // set up our own records | |
1346 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1347 | if (!net) |
1da177e4 | 1348 | goto out; |
1da177e4 | 1349 | |
0dacca73 BH |
1350 | /* netdev_printk() needs this so do it as early as possible */ |
1351 | SET_NETDEV_DEV(net, &udev->dev); | |
1352 | ||
1da177e4 LT |
1353 | dev = netdev_priv(net); |
1354 | dev->udev = xdev; | |
a11a6544 | 1355 | dev->intf = udev; |
1da177e4 | 1356 | dev->driver_info = info; |
296c0242 | 1357 | dev->driver_name = name; |
1da177e4 LT |
1358 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1359 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1360 | skb_queue_head_init (&dev->rxq); | |
1361 | skb_queue_head_init (&dev->txq); | |
1362 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1363 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1364 | dev->bh.func = usbnet_bh; |
1365 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1366 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1367 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1368 | dev->delay.function = usbnet_bh; |
1369 | dev->delay.data = (unsigned long) dev; | |
1370 | init_timer (&dev->delay); | |
a9fc6338 | 1371 | mutex_init (&dev->phy_mutex); |
1da177e4 | 1372 | |
1da177e4 LT |
1373 | dev->net = net; |
1374 | strcpy (net->name, "usb%d"); | |
1375 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1376 | ||
2e55cc72 DB |
1377 | /* rx and tx sides can use different message sizes; |
1378 | * bind() should set rx_urb_size in that case. | |
1379 | */ | |
1380 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1381 | #if 0 |
1382 | // dma_supported() is deeply broken on almost all architectures | |
1383 | // possible with some EHCI controllers | |
6a35528a | 1384 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1385 | net->features |= NETIF_F_HIGHDMA; |
1386 | #endif | |
1387 | ||
777baa47 | 1388 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1389 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1390 | net->ethtool_ops = &usbnet_ethtool_ops; |
1391 | ||
1392 | // allow device-specific bind/init procedures | |
1393 | // NOTE net->name still not usable ... | |
1394 | if (info->bind) { | |
1395 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1396 | if (status < 0) |
1397 | goto out1; | |
1398 | ||
1da177e4 LT |
1399 | // heuristic: "usb%d" for links we know are two-host, |
1400 | // else "eth%d" when there's reasonable doubt. userspace | |
1401 | // can rename the link if it knows better. | |
8e95a202 | 1402 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1403 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1404 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1405 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1406 | /* WLAN devices should always be named "wlan%d" */ |
1407 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1408 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1409 | /* WWAN devices should always be named "wwan%d" */ |
1410 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1411 | strcpy(net->name, "wwan%d"); | |
f29fc259 DB |
1412 | |
1413 | /* maybe the remote can't receive an Ethernet MTU */ | |
1414 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1415 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1416 | } else if (!info->in || !info->out) |
1417 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1418 | else { |
1419 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1420 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1421 | if (!(info->flags & FLAG_NO_SETINT)) | |
1422 | status = usb_set_interface (xdev, | |
1423 | interface->desc.bInterfaceNumber, | |
1424 | interface->desc.bAlternateSetting); | |
1425 | else | |
1426 | status = 0; | |
1427 | ||
1428 | } | |
9514bfe5 | 1429 | if (status >= 0 && dev->status) |
1da177e4 LT |
1430 | status = init_status (dev, udev); |
1431 | if (status < 0) | |
cb1cebbe | 1432 | goto out3; |
1da177e4 | 1433 | |
2e55cc72 DB |
1434 | if (!dev->rx_urb_size) |
1435 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1436 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1437 | |
225794f8 MH |
1438 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1439 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1440 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1441 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1442 | ||
1da177e4 LT |
1443 | status = register_netdev (net); |
1444 | if (status) | |
1445 | goto out3; | |
a475f603 JP |
1446 | netif_info(dev, probe, dev->net, |
1447 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1448 | udev->dev.driver->name, | |
1449 | xdev->bus->bus_name, xdev->devpath, | |
1450 | dev->driver_info->description, | |
1451 | net->dev_addr); | |
1da177e4 LT |
1452 | |
1453 | // ok, it's ready to go. | |
1454 | usb_set_intfdata (udev, dev); | |
1455 | ||
1da177e4 LT |
1456 | netif_device_attach (net); |
1457 | ||
37e8273c BH |
1458 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
1459 | netif_carrier_off(net); | |
1460 | ||
1da177e4 LT |
1461 | return 0; |
1462 | ||
1463 | out3: | |
1464 | if (info->unbind) | |
1465 | info->unbind (dev, udev); | |
1466 | out1: | |
1467 | free_netdev(net); | |
1468 | out: | |
1469 | usb_put_dev(xdev); | |
1470 | return status; | |
1471 | } | |
38bde1d4 | 1472 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1473 | |
1474 | /*-------------------------------------------------------------------------*/ | |
1475 | ||
36433127 ON |
1476 | /* |
1477 | * suspend the whole driver as soon as the first interface is suspended | |
1478 | * resume only when the last interface is resumed | |
38bde1d4 | 1479 | */ |
1da177e4 | 1480 | |
38bde1d4 | 1481 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1482 | { |
1483 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1484 | |
36433127 | 1485 | if (!dev->suspend_count++) { |
69ee472f ON |
1486 | spin_lock_irq(&dev->txq.lock); |
1487 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1488 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
69ee472f ON |
1489 | spin_unlock_irq(&dev->txq.lock); |
1490 | return -EBUSY; | |
1491 | } else { | |
1492 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1493 | spin_unlock_irq(&dev->txq.lock); | |
1494 | } | |
a11a6544 ON |
1495 | /* |
1496 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1497 | * having everything error out. |
1498 | */ | |
1499 | netif_device_detach (dev->net); | |
69ee472f ON |
1500 | usbnet_terminate_urbs(dev); |
1501 | usb_kill_urb(dev->interrupt); | |
1502 | ||
a11a6544 ON |
1503 | /* |
1504 | * reattach so runtime management can use and | |
1505 | * wake the device | |
1506 | */ | |
1507 | netif_device_attach (dev->net); | |
36433127 | 1508 | } |
1da177e4 LT |
1509 | return 0; |
1510 | } | |
38bde1d4 | 1511 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1512 | |
38bde1d4 | 1513 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1514 | { |
1515 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1516 | struct sk_buff *skb; |
1517 | struct urb *res; | |
1518 | int retval; | |
1519 | ||
1520 | if (!--dev->suspend_count) { | |
68972efa PS |
1521 | /* resume interrupt URBs */ |
1522 | if (dev->interrupt && test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1523 | usb_submit_urb(dev->interrupt, GFP_NOIO); | |
1524 | ||
69ee472f ON |
1525 | spin_lock_irq(&dev->txq.lock); |
1526 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1527 | ||
69ee472f ON |
1528 | skb = (struct sk_buff *)res->context; |
1529 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1530 | if (retval < 0) { | |
1531 | dev_kfree_skb_any(skb); | |
1532 | usb_free_urb(res); | |
1533 | usb_autopm_put_interface_async(dev->intf); | |
1534 | } else { | |
1535 | dev->net->trans_start = jiffies; | |
1536 | __skb_queue_tail(&dev->txq, skb); | |
1537 | } | |
1538 | } | |
1da177e4 | 1539 | |
69ee472f ON |
1540 | smp_mb(); |
1541 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1542 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1543 | |
1544 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
1545 | if (!(dev->txq.qlen >= TX_QLEN(dev))) | |
1aa9bc5b | 1546 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1547 | tasklet_schedule (&dev->bh); |
1548 | } | |
69ee472f | 1549 | } |
1da177e4 LT |
1550 | return 0; |
1551 | } | |
38bde1d4 | 1552 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1553 | |
1da177e4 | 1554 | |
1da177e4 LT |
1555 | /*-------------------------------------------------------------------------*/ |
1556 | ||
f29fc259 | 1557 | static int __init usbnet_init(void) |
1da177e4 | 1558 | { |
c582a950 TF |
1559 | /* Compiler should optimize this out. */ |
1560 | BUILD_BUG_ON( | |
1561 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 LT |
1562 | |
1563 | random_ether_addr(node_id); | |
cb1cebbe | 1564 | return 0; |
1da177e4 | 1565 | } |
f29fc259 | 1566 | module_init(usbnet_init); |
1da177e4 | 1567 | |
f29fc259 | 1568 | static void __exit usbnet_exit(void) |
1da177e4 | 1569 | { |
1da177e4 | 1570 | } |
f29fc259 | 1571 | module_exit(usbnet_exit); |
1da177e4 | 1572 | |
f29fc259 | 1573 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1574 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1575 | MODULE_LICENSE("GPL"); |