Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
090ffa9d | 2 | * USB Network driver infrastructure |
f29fc259 | 3 | * Copyright (C) 2000-2005 by David Brownell |
1da177e4 | 4 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* | |
22 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
23 | * kinds of full and high speed networking devices: host-to-host cables, |
24 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 25 | * |
090ffa9d DB |
26 | * These devices usually differ in terms of control protocols (if they |
27 | * even have one!) and sometimes they define new framing to wrap or batch | |
28 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
29 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
30 | * issues can usefully be addressed by this framework. | |
31 | */ | |
1da177e4 LT |
32 | |
33 | // #define DEBUG // error path messages, extra info | |
34 | // #define VERBOSE // more; success messages | |
35 | ||
1da177e4 | 36 | #include <linux/module.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/etherdevice.h> | |
03ad032b | 40 | #include <linux/ctype.h> |
1da177e4 LT |
41 | #include <linux/ethtool.h> |
42 | #include <linux/workqueue.h> | |
43 | #include <linux/mii.h> | |
1da177e4 | 44 | #include <linux/usb.h> |
3692e94f | 45 | #include <linux/usb/usbnet.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
fd1f170d | 47 | #include <linux/kernel.h> |
b0786b43 | 48 | #include <linux/pm_runtime.h> |
f29fc259 DB |
49 | |
50 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
51 | |
52 | ||
53 | /*-------------------------------------------------------------------------*/ | |
54 | ||
55 | /* | |
56 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
57 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
58 | * One maximum size Ethernet packet takes twenty four of them. | |
59 | * For high speed, each frame comfortably fits almost 36 max size | |
60 | * Ethernet packets (so queues should be bigger). | |
f29fc259 DB |
61 | * |
62 | * REVISIT qlens should be members of 'struct usbnet'; the goal is to | |
63 | * let the USB host controller be busy for 5msec or more before an irq | |
64 | * is required, under load. Jumbograms change the equation. | |
1da177e4 | 65 | */ |
a99c1949 JP |
66 | #define RX_MAX_QUEUE_MEMORY (60 * 1518) |
67 | #define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
68 | (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4) | |
69 | #define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \ | |
70 | (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4) | |
1da177e4 | 71 | |
1da177e4 LT |
72 | // reawaken network queue this soon after stopping; else watchdog barks |
73 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
74 | ||
75 | // throttle rx/tx briefly after some faults, so khubd might disconnect() | |
76 | // us (it polls at HZ/4 usually) before we report too many false errors. | |
77 | #define THROTTLE_JIFFIES (HZ/8) | |
78 | ||
1da177e4 LT |
79 | // between wakeups |
80 | #define UNLINK_TIMEOUT_MS 3 | |
81 | ||
82 | /*-------------------------------------------------------------------------*/ | |
83 | ||
84 | // randomly generated ethernet address | |
85 | static u8 node_id [ETH_ALEN]; | |
86 | ||
1da177e4 LT |
87 | static const char driver_name [] = "usbnet"; |
88 | ||
89 | /* use ethtool to change the level for any given device */ | |
90 | static int msg_level = -1; | |
91 | module_param (msg_level, int, 0); | |
92 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
93 | ||
1da177e4 LT |
94 | /*-------------------------------------------------------------------------*/ |
95 | ||
1da177e4 | 96 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 97 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
98 | { |
99 | int tmp; | |
100 | struct usb_host_interface *alt = NULL; | |
101 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
102 | struct usb_host_endpoint *status = NULL; | |
103 | ||
104 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
105 | unsigned ep; | |
106 | ||
107 | in = out = status = NULL; | |
108 | alt = intf->altsetting + tmp; | |
109 | ||
110 | /* take the first altsetting with in-bulk + out-bulk; | |
111 | * remember any status endpoint, just in case; | |
70f23fd6 | 112 | * ignore other endpoints and altsettings. |
1da177e4 LT |
113 | */ |
114 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
115 | struct usb_host_endpoint *e; | |
116 | int intr = 0; | |
117 | ||
118 | e = alt->endpoint + ep; | |
119 | switch (e->desc.bmAttributes) { | |
120 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 121 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
122 | continue; |
123 | intr = 1; | |
124 | /* FALLTHROUGH */ | |
125 | case USB_ENDPOINT_XFER_BULK: | |
126 | break; | |
127 | default: | |
128 | continue; | |
129 | } | |
fc6e2544 | 130 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
131 | if (!intr && !in) |
132 | in = e; | |
133 | else if (intr && !status) | |
134 | status = e; | |
135 | } else { | |
136 | if (!out) | |
137 | out = e; | |
138 | } | |
139 | } | |
140 | if (in && out) | |
141 | break; | |
142 | } | |
143 | if (!alt || !in || !out) | |
144 | return -EINVAL; | |
145 | ||
8e95a202 JP |
146 | if (alt->desc.bAlternateSetting != 0 || |
147 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
148 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
149 | alt->desc.bAlternateSetting); | |
150 | if (tmp < 0) | |
151 | return tmp; | |
152 | } | |
cb1cebbe | 153 | |
1da177e4 LT |
154 | dev->in = usb_rcvbulkpipe (dev->udev, |
155 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
156 | dev->out = usb_sndbulkpipe (dev->udev, | |
157 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
158 | dev->status = status; | |
159 | return 0; | |
160 | } | |
2e55cc72 | 161 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 162 | |
03ad032b PH |
163 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
164 | { | |
165 | int tmp, i; | |
166 | unsigned char buf [13]; | |
167 | ||
168 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); | |
169 | if (tmp != 12) { | |
170 | dev_dbg(&dev->udev->dev, | |
171 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
172 | if (tmp >= 0) | |
173 | tmp = -EINVAL; | |
174 | return tmp; | |
175 | } | |
176 | for (i = tmp = 0; i < 6; i++, tmp += 2) | |
177 | dev->net->dev_addr [i] = | |
fd1f170d | 178 | (hex_to_bin(buf[tmp]) << 4) + hex_to_bin(buf[tmp + 1]); |
03ad032b PH |
179 | return 0; |
180 | } | |
181 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
182 | ||
24ead299 | 183 | static void intr_complete (struct urb *urb) |
184 | { | |
185 | struct usbnet *dev = urb->context; | |
186 | int status = urb->status; | |
187 | ||
188 | switch (status) { | |
189 | /* success */ | |
190 | case 0: | |
191 | dev->driver_info->status(dev, urb); | |
192 | break; | |
193 | ||
194 | /* software-driven interface shutdown */ | |
195 | case -ENOENT: /* urb killed */ | |
196 | case -ESHUTDOWN: /* hardware gone */ | |
197 | netif_dbg(dev, ifdown, dev->net, | |
198 | "intr shutdown, code %d\n", status); | |
199 | return; | |
200 | ||
201 | /* NOTE: not throttling like RX/TX, since this endpoint | |
202 | * already polls infrequently | |
203 | */ | |
204 | default: | |
205 | netdev_dbg(dev->net, "intr status %d\n", status); | |
206 | break; | |
207 | } | |
208 | ||
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); | |
9532021d SG |
362 | if (!schedule_work (&dev->kevent)) { |
363 | if (net_ratelimit()) | |
364 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
365 | } else { | |
60b86755 | 366 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 367 | } |
1da177e4 | 368 | } |
2e55cc72 | 369 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
370 | |
371 | /*-------------------------------------------------------------------------*/ | |
372 | ||
7d12e780 | 373 | static void rx_complete (struct urb *urb); |
1da177e4 | 374 | |
dacb3975 | 375 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
376 | { |
377 | struct sk_buff *skb; | |
378 | struct skb_data *entry; | |
379 | int retval = 0; | |
380 | unsigned long lockflags; | |
2e55cc72 | 381 | size_t size = dev->rx_urb_size; |
1da177e4 | 382 | |
7bdd4027 ED |
383 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
384 | if (!skb) { | |
a475f603 | 385 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 386 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 387 | usb_free_urb (urb); |
dacb3975 | 388 | return -ENOMEM; |
1da177e4 | 389 | } |
1da177e4 LT |
390 | |
391 | entry = (struct skb_data *) skb->cb; | |
392 | entry->urb = urb; | |
393 | entry->dev = dev; | |
1da177e4 LT |
394 | entry->length = 0; |
395 | ||
396 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
397 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
398 | |
399 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
400 | ||
8e95a202 JP |
401 | if (netif_running (dev->net) && |
402 | netif_device_present (dev->net) && | |
69ee472f ON |
403 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
404 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 405 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 406 | case -EPIPE: |
2e55cc72 | 407 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
408 | break; |
409 | case -ENOMEM: | |
2e55cc72 | 410 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
411 | break; |
412 | case -ENODEV: | |
a475f603 | 413 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
414 | netif_device_detach (dev->net); |
415 | break; | |
dacb3975 DM |
416 | case -EHOSTUNREACH: |
417 | retval = -ENOLINK; | |
418 | break; | |
1da177e4 | 419 | default: |
a475f603 JP |
420 | netif_dbg(dev, rx_err, dev->net, |
421 | "rx submit, %d\n", retval); | |
1da177e4 LT |
422 | tasklet_schedule (&dev->bh); |
423 | break; | |
424 | case 0: | |
5b6e9bcd | 425 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
426 | } |
427 | } else { | |
a475f603 | 428 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
429 | retval = -ENOLINK; |
430 | } | |
431 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
432 | if (retval) { | |
433 | dev_kfree_skb_any (skb); | |
434 | usb_free_urb (urb); | |
435 | } | |
dacb3975 | 436 | return retval; |
1da177e4 LT |
437 | } |
438 | ||
439 | ||
440 | /*-------------------------------------------------------------------------*/ | |
441 | ||
442 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
443 | { | |
8e95a202 | 444 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
445 | !dev->driver_info->rx_fixup (dev, skb)) { |
446 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
447 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
448 | dev->net->stats.rx_errors++; | |
449 | goto done; | |
450 | } | |
1da177e4 LT |
451 | // else network stack removes extra byte if we forced a short packet |
452 | ||
073285fd AO |
453 | if (skb->len) { |
454 | /* all data was already cloned from skb inside the driver */ | |
455 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
456 | dev_kfree_skb_any(skb); | |
457 | else | |
458 | usbnet_skb_return(dev, skb); | |
459 | return; | |
1da177e4 | 460 | } |
073285fd AO |
461 | |
462 | netif_dbg(dev, rx_err, dev->net, "drop\n"); | |
073285fd | 463 | dev->net->stats.rx_errors++; |
7a635ea9 | 464 | done: |
073285fd | 465 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
466 | } |
467 | ||
468 | /*-------------------------------------------------------------------------*/ | |
469 | ||
7d12e780 | 470 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
471 | { |
472 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
473 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
474 | struct usbnet *dev = entry->dev; | |
475 | int urb_status = urb->status; | |
5b6e9bcd | 476 | enum skb_state state; |
1da177e4 LT |
477 | |
478 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 479 | state = rx_done; |
1da177e4 LT |
480 | entry->urb = NULL; |
481 | ||
482 | switch (urb_status) { | |
18ab458f DB |
483 | /* success */ |
484 | case 0: | |
f29fc259 | 485 | if (skb->len < dev->net->hard_header_len) { |
5b6e9bcd | 486 | state = rx_cleanup; |
7963837f HX |
487 | dev->net->stats.rx_errors++; |
488 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
489 | netif_dbg(dev, rx_err, dev->net, |
490 | "rx length %d\n", skb->len); | |
1da177e4 LT |
491 | } |
492 | break; | |
493 | ||
18ab458f DB |
494 | /* stalls need manual reset. this is rare ... except that |
495 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 496 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
497 | * storm, recovering as needed. |
498 | */ | |
499 | case -EPIPE: | |
7963837f | 500 | dev->net->stats.rx_errors++; |
2e55cc72 | 501 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
502 | // FALLTHROUGH |
503 | ||
18ab458f DB |
504 | /* software-driven interface shutdown */ |
505 | case -ECONNRESET: /* async unlink */ | |
506 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
507 | netif_dbg(dev, ifdown, dev->net, |
508 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
509 | goto block; |
510 | ||
18ab458f DB |
511 | /* we get controller i/o faults during khubd disconnect() delays. |
512 | * throttle down resubmits, to avoid log floods; just temporarily, | |
513 | * so we still recover when the fault isn't a khubd delay. | |
514 | */ | |
515 | case -EPROTO: | |
516 | case -ETIME: | |
517 | case -EILSEQ: | |
7963837f | 518 | dev->net->stats.rx_errors++; |
1da177e4 LT |
519 | if (!timer_pending (&dev->delay)) { |
520 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
521 | netif_dbg(dev, link, dev->net, |
522 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
523 | } |
524 | block: | |
5b6e9bcd | 525 | state = rx_cleanup; |
1da177e4 LT |
526 | entry->urb = urb; |
527 | urb = NULL; | |
528 | break; | |
529 | ||
18ab458f DB |
530 | /* data overrun ... flush fifo? */ |
531 | case -EOVERFLOW: | |
7963837f | 532 | dev->net->stats.rx_over_errors++; |
1da177e4 | 533 | // FALLTHROUGH |
cb1cebbe | 534 | |
18ab458f | 535 | default: |
5b6e9bcd | 536 | state = rx_cleanup; |
7963837f | 537 | dev->net->stats.rx_errors++; |
a475f603 | 538 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
539 | break; |
540 | } | |
541 | ||
5b6e9bcd | 542 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
543 | |
544 | if (urb) { | |
8e95a202 | 545 | if (netif_running (dev->net) && |
5b6e9bcd ML |
546 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
547 | state != unlink_start) { | |
1da177e4 | 548 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 549 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
550 | return; |
551 | } | |
552 | usb_free_urb (urb); | |
553 | } | |
a475f603 | 554 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
555 | } |
556 | ||
7834ddbc JK |
557 | /*-------------------------------------------------------------------------*/ |
558 | void usbnet_pause_rx(struct usbnet *dev) | |
559 | { | |
560 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
561 | ||
a475f603 | 562 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
563 | } |
564 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
565 | ||
566 | void usbnet_resume_rx(struct usbnet *dev) | |
567 | { | |
568 | struct sk_buff *skb; | |
569 | int num = 0; | |
570 | ||
571 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
572 | ||
573 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
574 | usbnet_skb_return(dev, skb); | |
575 | num++; | |
576 | } | |
577 | ||
578 | tasklet_schedule(&dev->bh); | |
579 | ||
a475f603 JP |
580 | netif_dbg(dev, rx_status, dev->net, |
581 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
582 | } |
583 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
584 | ||
585 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
586 | { | |
587 | skb_queue_purge(&dev->rxq_pause); | |
588 | } | |
589 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
590 | ||
1da177e4 LT |
591 | /*-------------------------------------------------------------------------*/ |
592 | ||
593 | // unlink pending rx/tx; completion handlers do all other cleanup | |
594 | ||
595 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
596 | { | |
597 | unsigned long flags; | |
5b6e9bcd | 598 | struct sk_buff *skb; |
1da177e4 LT |
599 | int count = 0; |
600 | ||
601 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 602 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
603 | struct skb_data *entry; |
604 | struct urb *urb; | |
605 | int retval; | |
606 | ||
5b6e9bcd ML |
607 | skb_queue_walk(q, skb) { |
608 | entry = (struct skb_data *) skb->cb; | |
609 | if (entry->state != unlink_start) | |
610 | goto found; | |
611 | } | |
612 | break; | |
613 | found: | |
614 | entry->state = unlink_start; | |
1da177e4 | 615 | urb = entry->urb; |
1da177e4 | 616 | |
0956a8c2 | 617 | /* |
618 | * Get reference count of the URB to avoid it to be | |
619 | * freed during usb_unlink_urb, which may trigger | |
620 | * use-after-free problem inside usb_unlink_urb since | |
621 | * usb_unlink_urb is always racing with .complete | |
622 | * handler(include defer_bh). | |
623 | */ | |
624 | usb_get_urb(urb); | |
4231d47e | 625 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
626 | // during some PM-driven resume scenarios, |
627 | // these (async) unlinks complete immediately | |
628 | retval = usb_unlink_urb (urb); | |
629 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 630 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
631 | else |
632 | count++; | |
0956a8c2 | 633 | usb_put_urb(urb); |
4231d47e | 634 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
635 | } |
636 | spin_unlock_irqrestore (&q->lock, flags); | |
637 | return count; | |
638 | } | |
639 | ||
a99c1949 JP |
640 | // Flush all pending rx urbs |
641 | // minidrivers may need to do this when the MTU changes | |
642 | ||
643 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
644 | { | |
645 | if (netif_running(dev->net)) { | |
646 | (void) unlink_urbs (dev, &dev->rxq); | |
647 | tasklet_schedule(&dev->bh); | |
648 | } | |
649 | } | |
650 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
651 | |
652 | /*-------------------------------------------------------------------------*/ | |
653 | ||
654 | // precondition: never called in_interrupt | |
69ee472f ON |
655 | static void usbnet_terminate_urbs(struct usbnet *dev) |
656 | { | |
657 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
658 | DECLARE_WAITQUEUE(wait, current); | |
659 | int temp; | |
660 | ||
661 | /* ensure there are no more active urbs */ | |
662 | add_wait_queue(&unlink_wakeup, &wait); | |
663 | set_current_state(TASK_UNINTERRUPTIBLE); | |
664 | dev->wait = &unlink_wakeup; | |
665 | temp = unlink_urbs(dev, &dev->txq) + | |
666 | unlink_urbs(dev, &dev->rxq); | |
667 | ||
668 | /* maybe wait for deletions to finish. */ | |
669 | while (!skb_queue_empty(&dev->rxq) | |
670 | && !skb_queue_empty(&dev->txq) | |
671 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 672 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 673 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
674 | netif_dbg(dev, ifdown, dev->net, |
675 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
676 | } |
677 | set_current_state(TASK_RUNNING); | |
678 | dev->wait = NULL; | |
679 | remove_wait_queue(&unlink_wakeup, &wait); | |
680 | } | |
1da177e4 | 681 | |
777baa47 | 682 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
683 | { |
684 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 685 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 686 | int retval; |
1da177e4 | 687 | |
75bd0cbd | 688 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
689 | netif_stop_queue (net); |
690 | ||
a475f603 | 691 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 692 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
693 | net->stats.rx_packets, net->stats.tx_packets, |
694 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 695 | |
a33e9e7f JK |
696 | /* allow minidriver to stop correctly (wireless devices to turn off |
697 | * radio etc) */ | |
698 | if (info->stop) { | |
699 | retval = info->stop(dev); | |
a475f603 JP |
700 | if (retval < 0) |
701 | netif_info(dev, ifdown, dev->net, | |
702 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
703 | retval, | |
704 | dev->udev->bus->bus_name, dev->udev->devpath, | |
705 | info->description); | |
a33e9e7f JK |
706 | } |
707 | ||
69ee472f ON |
708 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
709 | usbnet_terminate_urbs(dev); | |
1da177e4 LT |
710 | |
711 | usb_kill_urb(dev->interrupt); | |
712 | ||
7834ddbc JK |
713 | usbnet_purge_paused_rxq(dev); |
714 | ||
1da177e4 LT |
715 | /* deferred work (task, timer, softirq) must also stop. |
716 | * can't flush_scheduled_work() until we drop rtnl (later), | |
717 | * else workers could deadlock; so make workers a NOP. | |
718 | */ | |
719 | dev->flags = 0; | |
720 | del_timer_sync (&dev->delay); | |
721 | tasklet_kill (&dev->bh); | |
69ee472f ON |
722 | if (info->manage_power) |
723 | info->manage_power(dev, 0); | |
724 | else | |
725 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
726 | |
727 | return 0; | |
728 | } | |
777baa47 | 729 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
730 | |
731 | /*-------------------------------------------------------------------------*/ | |
732 | ||
733 | // posts reads, and enables write queuing | |
734 | ||
735 | // precondition: never called in_interrupt | |
736 | ||
777baa47 | 737 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
738 | { |
739 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 740 | int retval; |
1da177e4 LT |
741 | struct driver_info *info = dev->driver_info; |
742 | ||
a11a6544 | 743 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
744 | netif_info(dev, ifup, dev->net, |
745 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
746 | retval, | |
747 | dev->udev->bus->bus_name, | |
748 | dev->udev->devpath, | |
749 | info->description); | |
a11a6544 ON |
750 | goto done_nopm; |
751 | } | |
752 | ||
1da177e4 LT |
753 | // put into "known safe" state |
754 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
755 | netif_info(dev, ifup, dev->net, |
756 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
757 | retval, | |
758 | dev->udev->bus->bus_name, | |
759 | dev->udev->devpath, | |
760 | info->description); | |
1da177e4 LT |
761 | goto done; |
762 | } | |
763 | ||
764 | // insist peer be connected | |
765 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 766 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
767 | goto done; |
768 | } | |
769 | ||
770 | /* start any status interrupt transfer */ | |
771 | if (dev->interrupt) { | |
772 | retval = usb_submit_urb (dev->interrupt, GFP_KERNEL); | |
773 | if (retval < 0) { | |
a475f603 JP |
774 | netif_err(dev, ifup, dev->net, |
775 | "intr submit %d\n", retval); | |
1da177e4 LT |
776 | goto done; |
777 | } | |
778 | } | |
779 | ||
68972efa | 780 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 781 | netif_start_queue (net); |
a475f603 JP |
782 | netif_info(dev, ifup, dev->net, |
783 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
784 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
785 | dev->net->mtu, | |
786 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
787 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
788 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
789 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
790 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
791 | "simple"); | |
1da177e4 LT |
792 | |
793 | // delay posting reads until we're fully open | |
794 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
795 | if (info->manage_power) { |
796 | retval = info->manage_power(dev, 1); | |
797 | if (retval < 0) | |
fb13c47b | 798 | goto done_manage_power_error; |
69ee472f ON |
799 | usb_autopm_put_interface(dev->intf); |
800 | } | |
a11a6544 | 801 | return retval; |
a475f603 | 802 | |
fb13c47b ML |
803 | done_manage_power_error: |
804 | clear_bit(EVENT_DEV_OPEN, &dev->flags); | |
1da177e4 | 805 | done: |
a11a6544 ON |
806 | usb_autopm_put_interface(dev->intf); |
807 | done_nopm: | |
1da177e4 LT |
808 | return retval; |
809 | } | |
777baa47 | 810 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
811 | |
812 | /*-------------------------------------------------------------------------*/ | |
813 | ||
2e55cc72 DB |
814 | /* ethtool methods; minidrivers may need to add some more, but |
815 | * they'll probably want to use this base set. | |
816 | */ | |
817 | ||
c41286fd AB |
818 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
819 | { | |
820 | struct usbnet *dev = netdev_priv(net); | |
821 | ||
822 | if (!dev->mii.mdio_read) | |
823 | return -EOPNOTSUPP; | |
824 | ||
825 | return mii_ethtool_gset(&dev->mii, cmd); | |
826 | } | |
827 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
828 | ||
829 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
830 | { | |
831 | struct usbnet *dev = netdev_priv(net); | |
832 | int retval; | |
833 | ||
834 | if (!dev->mii.mdio_write) | |
835 | return -EOPNOTSUPP; | |
836 | ||
837 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
838 | ||
839 | /* link speed/duplex might have changed */ | |
840 | if (dev->driver_info->link_reset) | |
841 | dev->driver_info->link_reset(dev); | |
842 | ||
843 | return retval; | |
844 | ||
845 | } | |
846 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
847 | ||
c41286fd | 848 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
849 | { |
850 | struct usbnet *dev = netdev_priv(net); | |
851 | ||
f29fc259 | 852 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
853 | if (dev->driver_info->check_connect) |
854 | return dev->driver_info->check_connect (dev) == 0; | |
855 | ||
c41286fd AB |
856 | /* if the device has mii operations, use those */ |
857 | if (dev->mii.mdio_read) | |
858 | return mii_link_ok(&dev->mii); | |
859 | ||
05ffb3e2 BM |
860 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
861 | return ethtool_op_get_link(net); | |
1da177e4 | 862 | } |
c41286fd | 863 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 864 | |
18ee91fa | 865 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
866 | { |
867 | struct usbnet *dev = netdev_priv(net); | |
868 | ||
18ee91fa DB |
869 | if (!dev->mii.mdio_write) |
870 | return -EOPNOTSUPP; | |
871 | ||
872 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 873 | } |
18ee91fa | 874 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 875 | |
18ee91fa | 876 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
877 | { |
878 | struct usbnet *dev = netdev_priv(net); | |
879 | ||
86a2f415 PS |
880 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
881 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
882 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
883 | sizeof info->fw_version); |
884 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 885 | } |
18ee91fa | 886 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 887 | |
18ee91fa | 888 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
889 | { |
890 | struct usbnet *dev = netdev_priv(net); | |
891 | ||
18ee91fa DB |
892 | return dev->msg_enable; |
893 | } | |
894 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 895 | |
18ee91fa DB |
896 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
897 | { | |
898 | struct usbnet *dev = netdev_priv(net); | |
899 | ||
900 | dev->msg_enable = level; | |
c41286fd | 901 | } |
18ee91fa | 902 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 903 | |
2e55cc72 | 904 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 905 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
906 | .get_settings = usbnet_get_settings, |
907 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 908 | .get_link = usbnet_get_link, |
c41286fd | 909 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 910 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
911 | .get_msglevel = usbnet_get_msglevel, |
912 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 913 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 914 | }; |
1da177e4 LT |
915 | |
916 | /*-------------------------------------------------------------------------*/ | |
917 | ||
918 | /* work that cannot be done in interrupt context uses keventd. | |
919 | * | |
920 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
921 | * especially now that control transfers can be queued. | |
922 | */ | |
923 | static void | |
c4028958 | 924 | kevent (struct work_struct *work) |
1da177e4 | 925 | { |
c4028958 DH |
926 | struct usbnet *dev = |
927 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
928 | int status; |
929 | ||
930 | /* usb_clear_halt() needs a thread context */ | |
931 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
932 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
933 | status = usb_autopm_get_interface(dev->intf); |
934 | if (status < 0) | |
935 | goto fail_pipe; | |
1da177e4 | 936 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 937 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
938 | if (status < 0 && |
939 | status != -EPIPE && | |
940 | status != -ESHUTDOWN) { | |
1da177e4 | 941 | if (netif_msg_tx_err (dev)) |
69ee472f | 942 | fail_pipe: |
60b86755 JP |
943 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
944 | status); | |
1da177e4 LT |
945 | } else { |
946 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
947 | if (status != -ESHUTDOWN) |
948 | netif_wake_queue (dev->net); | |
1da177e4 LT |
949 | } |
950 | } | |
951 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
952 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
953 | status = usb_autopm_get_interface(dev->intf); |
954 | if (status < 0) | |
955 | goto fail_halt; | |
1da177e4 | 956 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 957 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
958 | if (status < 0 && |
959 | status != -EPIPE && | |
960 | status != -ESHUTDOWN) { | |
1da177e4 | 961 | if (netif_msg_rx_err (dev)) |
69ee472f | 962 | fail_halt: |
60b86755 JP |
963 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
964 | status); | |
1da177e4 LT |
965 | } else { |
966 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
967 | tasklet_schedule (&dev->bh); | |
968 | } | |
969 | } | |
970 | ||
971 | /* tasklet could resubmit itself forever if memory is tight */ | |
972 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
973 | struct urb *urb = NULL; | |
dacb3975 | 974 | int resched = 1; |
1da177e4 LT |
975 | |
976 | if (netif_running (dev->net)) | |
977 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
978 | else | |
979 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
980 | if (urb != NULL) { | |
981 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 982 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
983 | if (status < 0) { |
984 | usb_free_urb(urb); | |
69ee472f | 985 | goto fail_lowmem; |
ab60707f | 986 | } |
dacb3975 DM |
987 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
988 | resched = 0; | |
69ee472f ON |
989 | usb_autopm_put_interface(dev->intf); |
990 | fail_lowmem: | |
dacb3975 DM |
991 | if (resched) |
992 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
993 | } |
994 | } | |
995 | ||
7ea13c9c | 996 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 997 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
998 | int retval = 0; |
999 | ||
1000 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1001 | status = usb_autopm_get_interface(dev->intf); |
1002 | if (status < 0) | |
1003 | goto skip_reset; | |
7ea13c9c | 1004 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1005 | usb_autopm_put_interface(dev->intf); |
1006 | skip_reset: | |
60b86755 JP |
1007 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1008 | retval, | |
1009 | dev->udev->bus->bus_name, | |
1010 | dev->udev->devpath, | |
1011 | info->description); | |
69ee472f ON |
1012 | } else { |
1013 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c DH |
1014 | } |
1015 | } | |
1016 | ||
1da177e4 | 1017 | if (dev->flags) |
60b86755 | 1018 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1019 | } |
1020 | ||
1021 | /*-------------------------------------------------------------------------*/ | |
1022 | ||
7d12e780 | 1023 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1024 | { |
1025 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1026 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1027 | struct usbnet *dev = entry->dev; | |
1028 | ||
1029 | if (urb->status == 0) { | |
073285fd AO |
1030 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
1031 | dev->net->stats.tx_packets++; | |
7963837f | 1032 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1033 | } else { |
7963837f | 1034 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1035 | |
1036 | switch (urb->status) { | |
1037 | case -EPIPE: | |
2e55cc72 | 1038 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1039 | break; |
1040 | ||
1041 | /* software-driven interface shutdown */ | |
1042 | case -ECONNRESET: // async unlink | |
1043 | case -ESHUTDOWN: // hardware gone | |
1044 | break; | |
1045 | ||
1046 | // like rx, tx gets controller i/o faults during khubd delays | |
1047 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
1048 | case -EPROTO: |
1049 | case -ETIME: | |
1050 | case -EILSEQ: | |
69ee472f | 1051 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1052 | if (!timer_pending (&dev->delay)) { |
1053 | mod_timer (&dev->delay, | |
1054 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1055 | netif_dbg(dev, link, dev->net, |
1056 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1057 | } |
1058 | netif_stop_queue (dev->net); | |
1059 | break; | |
1060 | default: | |
a475f603 JP |
1061 | netif_dbg(dev, tx_err, dev->net, |
1062 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1063 | break; |
1064 | } | |
1065 | } | |
1066 | ||
69ee472f | 1067 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1068 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | /*-------------------------------------------------------------------------*/ | |
1072 | ||
777baa47 | 1073 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1074 | { |
1075 | struct usbnet *dev = netdev_priv(net); | |
1076 | ||
1077 | unlink_urbs (dev, &dev->txq); | |
1078 | tasklet_schedule (&dev->bh); | |
1079 | ||
1080 | // FIXME: device recovery -- reset? | |
1081 | } | |
777baa47 | 1082 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1083 | |
1084 | /*-------------------------------------------------------------------------*/ | |
1085 | ||
25a79c41 SH |
1086 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1087 | struct net_device *net) | |
1da177e4 LT |
1088 | { |
1089 | struct usbnet *dev = netdev_priv(net); | |
1090 | int length; | |
1da177e4 LT |
1091 | struct urb *urb = NULL; |
1092 | struct skb_data *entry; | |
1093 | struct driver_info *info = dev->driver_info; | |
1094 | unsigned long flags; | |
25a79c41 | 1095 | int retval; |
1da177e4 | 1096 | |
23ba0799 KK |
1097 | if (skb) |
1098 | skb_tx_timestamp(skb); | |
f9b491ec | 1099 | |
1da177e4 LT |
1100 | // some devices want funky USB-level framing, for |
1101 | // win32 driver (usually) and/or hardware quirks | |
1102 | if (info->tx_fixup) { | |
1103 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1104 | if (!skb) { | |
073285fd AO |
1105 | if (netif_msg_tx_err(dev)) { |
1106 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); | |
1107 | goto drop; | |
1108 | } else { | |
1109 | /* cdc_ncm collected packet; waits for more */ | |
1110 | goto not_drop; | |
1111 | } | |
1da177e4 LT |
1112 | } |
1113 | } | |
1114 | length = skb->len; | |
1115 | ||
1116 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1117 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1118 | goto drop; |
1119 | } | |
1120 | ||
1121 | entry = (struct skb_data *) skb->cb; | |
1122 | entry->urb = urb; | |
1123 | entry->dev = dev; | |
1da177e4 LT |
1124 | entry->length = length; |
1125 | ||
1da177e4 LT |
1126 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1127 | skb->data, skb->len, tx_complete, skb); | |
1da177e4 LT |
1128 | |
1129 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1130 | * NOTE: strictly conforming cdc-ether devices should expect | |
1131 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1132 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1133 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1134 | * packet itself if needed. | |
1da177e4 | 1135 | */ |
b4d562e3 EP |
1136 | if (length % dev->maxpacket == 0) { |
1137 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd AO |
1138 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
1139 | urb->transfer_buffer_length++; | |
1140 | if (skb_tailroom(skb)) { | |
1141 | skb->data[skb->len] = 0; | |
1142 | __skb_put(skb, 1); | |
1143 | } | |
b4d562e3 EP |
1144 | } |
1145 | } else | |
1146 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1147 | } |
1da177e4 | 1148 | |
69ee472f ON |
1149 | spin_lock_irqsave(&dev->txq.lock, flags); |
1150 | retval = usb_autopm_get_interface_async(dev->intf); | |
1151 | if (retval < 0) { | |
1152 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1153 | goto drop; | |
1154 | } | |
1155 | ||
1156 | #ifdef CONFIG_PM | |
1157 | /* if this triggers the device is still a sleep */ | |
1158 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1159 | /* transmission will be done in resume */ | |
1160 | usb_anchor_urb(urb, &dev->deferred); | |
1161 | /* no use to process more packets */ | |
1162 | netif_stop_queue(net); | |
39707c2a | 1163 | usb_put_urb(urb); |
69ee472f | 1164 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1165 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1166 | goto deferred; |
1167 | } | |
1168 | #endif | |
1da177e4 | 1169 | |
1da177e4 LT |
1170 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1171 | case -EPIPE: | |
1172 | netif_stop_queue (net); | |
2e55cc72 | 1173 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1174 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1175 | break; |
1176 | default: | |
69ee472f | 1177 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1178 | netif_dbg(dev, tx_err, dev->net, |
1179 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1180 | break; |
1181 | case 0: | |
1182 | net->trans_start = jiffies; | |
5b6e9bcd | 1183 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1184 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1185 | netif_stop_queue (net); | |
1186 | } | |
1187 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1188 | ||
1189 | if (retval) { | |
a475f603 | 1190 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1191 | drop: |
7963837f | 1192 | dev->net->stats.tx_dropped++; |
073285fd | 1193 | not_drop: |
1da177e4 LT |
1194 | if (skb) |
1195 | dev_kfree_skb_any (skb); | |
1196 | usb_free_urb (urb); | |
a475f603 JP |
1197 | } else |
1198 | netif_dbg(dev, tx_queued, dev->net, | |
1199 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1200 | #ifdef CONFIG_PM |
1201 | deferred: | |
1202 | #endif | |
25a79c41 | 1203 | return NETDEV_TX_OK; |
1da177e4 | 1204 | } |
777baa47 | 1205 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1206 | |
85e87870 | 1207 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1208 | { |
1209 | struct urb *urb; | |
1210 | int i; | |
85e87870 | 1211 | int ret = 0; |
65841fd5 ML |
1212 | |
1213 | /* don't refill the queue all at once */ | |
1214 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1215 | urb = usb_alloc_urb(0, flags); | |
1216 | if (urb != NULL) { | |
85e87870 BM |
1217 | ret = rx_submit(dev, urb, flags); |
1218 | if (ret) | |
1219 | goto err; | |
1220 | } else { | |
1221 | ret = -ENOMEM; | |
1222 | goto err; | |
65841fd5 ML |
1223 | } |
1224 | } | |
85e87870 BM |
1225 | err: |
1226 | return ret; | |
65841fd5 ML |
1227 | } |
1228 | ||
1da177e4 LT |
1229 | /*-------------------------------------------------------------------------*/ |
1230 | ||
1231 | // tasklet (work deferred from completions, in_irq) or timer | |
1232 | ||
1233 | static void usbnet_bh (unsigned long param) | |
1234 | { | |
1235 | struct usbnet *dev = (struct usbnet *) param; | |
1236 | struct sk_buff *skb; | |
1237 | struct skb_data *entry; | |
1238 | ||
1239 | while ((skb = skb_dequeue (&dev->done))) { | |
1240 | entry = (struct skb_data *) skb->cb; | |
1241 | switch (entry->state) { | |
18ab458f | 1242 | case rx_done: |
1da177e4 LT |
1243 | entry->state = rx_cleanup; |
1244 | rx_process (dev, skb); | |
1245 | continue; | |
18ab458f DB |
1246 | case tx_done: |
1247 | case rx_cleanup: | |
1da177e4 LT |
1248 | usb_free_urb (entry->urb); |
1249 | dev_kfree_skb (skb); | |
1250 | continue; | |
18ab458f | 1251 | default: |
60b86755 | 1252 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1253 | } |
1254 | } | |
1255 | ||
1256 | // waiting for all pending urbs to complete? | |
1257 | if (dev->wait) { | |
1258 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1259 | wake_up (dev->wait); | |
1260 | } | |
1261 | ||
1262 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1263 | } else if (netif_running (dev->net) && |
1264 | netif_device_present (dev->net) && | |
1265 | !timer_pending (&dev->delay) && | |
1266 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1267 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1268 | |
1269 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1270 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1271 | return; | |
a475f603 JP |
1272 | if (temp != dev->rxq.qlen) |
1273 | netif_dbg(dev, link, dev->net, | |
1274 | "rxqlen %d --> %d\n", | |
1275 | temp, dev->rxq.qlen); | |
65841fd5 | 1276 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1277 | tasklet_schedule (&dev->bh); |
1278 | } | |
1279 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1280 | netif_wake_queue (dev->net); | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | ||
1da177e4 LT |
1285 | /*------------------------------------------------------------------------- |
1286 | * | |
1287 | * USB Device Driver support | |
1288 | * | |
1289 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1290 | |
1da177e4 LT |
1291 | // precondition: never called in_interrupt |
1292 | ||
38bde1d4 | 1293 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1294 | { |
1295 | struct usbnet *dev; | |
1296 | struct usb_device *xdev; | |
1297 | struct net_device *net; | |
1298 | ||
1299 | dev = usb_get_intfdata(intf); | |
1300 | usb_set_intfdata(intf, NULL); | |
1301 | if (!dev) | |
1302 | return; | |
1303 | ||
1304 | xdev = interface_to_usbdev (intf); | |
1305 | ||
a475f603 JP |
1306 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1307 | intf->dev.driver->name, | |
1308 | xdev->bus->bus_name, xdev->devpath, | |
1309 | dev->driver_info->description); | |
cb1cebbe | 1310 | |
1da177e4 LT |
1311 | net = dev->net; |
1312 | unregister_netdev (net); | |
1313 | ||
23f333a2 | 1314 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1315 | |
39707c2a HK |
1316 | usb_scuttle_anchored_urbs(&dev->deferred); |
1317 | ||
1da177e4 LT |
1318 | if (dev->driver_info->unbind) |
1319 | dev->driver_info->unbind (dev, intf); | |
1320 | ||
68972efa PS |
1321 | usb_kill_urb(dev->interrupt); |
1322 | usb_free_urb(dev->interrupt); | |
1323 | ||
1da177e4 | 1324 | free_netdev(net); |
1da177e4 | 1325 | } |
38bde1d4 | 1326 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1327 | |
777baa47 SH |
1328 | static const struct net_device_ops usbnet_netdev_ops = { |
1329 | .ndo_open = usbnet_open, | |
1330 | .ndo_stop = usbnet_stop, | |
1331 | .ndo_start_xmit = usbnet_start_xmit, | |
1332 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1333 | .ndo_change_mtu = usbnet_change_mtu, | |
1334 | .ndo_set_mac_address = eth_mac_addr, | |
1335 | .ndo_validate_addr = eth_validate_addr, | |
1336 | }; | |
1da177e4 LT |
1337 | |
1338 | /*-------------------------------------------------------------------------*/ | |
1339 | ||
1da177e4 LT |
1340 | // precondition: never called in_interrupt |
1341 | ||
225794f8 MH |
1342 | static struct device_type wlan_type = { |
1343 | .name = "wlan", | |
1344 | }; | |
1345 | ||
1346 | static struct device_type wwan_type = { | |
1347 | .name = "wwan", | |
1348 | }; | |
1349 | ||
38bde1d4 | 1350 | int |
1da177e4 LT |
1351 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1352 | { | |
1353 | struct usbnet *dev; | |
cb1cebbe | 1354 | struct net_device *net; |
1da177e4 LT |
1355 | struct usb_host_interface *interface; |
1356 | struct driver_info *info; | |
1357 | struct usb_device *xdev; | |
1358 | int status; | |
296c0242 | 1359 | const char *name; |
b0786b43 ML |
1360 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1361 | ||
1362 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1363 | * for usb interface, otherwise usb_autopm_get_interface may return | |
1364 | * failure if USB_SUSPEND(RUNTIME_PM) is enabled. | |
1365 | */ | |
1366 | if (!driver->supports_autosuspend) { | |
1367 | driver->supports_autosuspend = 1; | |
1368 | pm_runtime_enable(&udev->dev); | |
1369 | } | |
1da177e4 | 1370 | |
296c0242 | 1371 | name = udev->dev.driver->name; |
1da177e4 LT |
1372 | info = (struct driver_info *) prod->driver_info; |
1373 | if (!info) { | |
296c0242 | 1374 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1375 | return -ENODEV; |
1376 | } | |
1377 | xdev = interface_to_usbdev (udev); | |
1378 | interface = udev->cur_altsetting; | |
1379 | ||
1da177e4 LT |
1380 | status = -ENOMEM; |
1381 | ||
1382 | // set up our own records | |
1383 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1384 | if (!net) |
1da177e4 | 1385 | goto out; |
1da177e4 | 1386 | |
0dacca73 BH |
1387 | /* netdev_printk() needs this so do it as early as possible */ |
1388 | SET_NETDEV_DEV(net, &udev->dev); | |
1389 | ||
1da177e4 LT |
1390 | dev = netdev_priv(net); |
1391 | dev->udev = xdev; | |
a11a6544 | 1392 | dev->intf = udev; |
1da177e4 | 1393 | dev->driver_info = info; |
296c0242 | 1394 | dev->driver_name = name; |
1da177e4 LT |
1395 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1396 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1397 | skb_queue_head_init (&dev->rxq); | |
1398 | skb_queue_head_init (&dev->txq); | |
1399 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1400 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1401 | dev->bh.func = usbnet_bh; |
1402 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1403 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1404 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1405 | dev->delay.function = usbnet_bh; |
1406 | dev->delay.data = (unsigned long) dev; | |
1407 | init_timer (&dev->delay); | |
a9fc6338 | 1408 | mutex_init (&dev->phy_mutex); |
1da177e4 | 1409 | |
1da177e4 LT |
1410 | dev->net = net; |
1411 | strcpy (net->name, "usb%d"); | |
1412 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1413 | ||
2e55cc72 DB |
1414 | /* rx and tx sides can use different message sizes; |
1415 | * bind() should set rx_urb_size in that case. | |
1416 | */ | |
1417 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1418 | #if 0 |
1419 | // dma_supported() is deeply broken on almost all architectures | |
1420 | // possible with some EHCI controllers | |
6a35528a | 1421 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1422 | net->features |= NETIF_F_HIGHDMA; |
1423 | #endif | |
1424 | ||
777baa47 | 1425 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1426 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1427 | net->ethtool_ops = &usbnet_ethtool_ops; |
1428 | ||
1429 | // allow device-specific bind/init procedures | |
1430 | // NOTE net->name still not usable ... | |
1431 | if (info->bind) { | |
1432 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1433 | if (status < 0) |
1434 | goto out1; | |
1435 | ||
1da177e4 LT |
1436 | // heuristic: "usb%d" for links we know are two-host, |
1437 | // else "eth%d" when there's reasonable doubt. userspace | |
1438 | // can rename the link if it knows better. | |
8e95a202 | 1439 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1440 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1441 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1442 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1443 | /* WLAN devices should always be named "wlan%d" */ |
1444 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1445 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1446 | /* WWAN devices should always be named "wwan%d" */ |
1447 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1448 | strcpy(net->name, "wwan%d"); | |
f29fc259 DB |
1449 | |
1450 | /* maybe the remote can't receive an Ethernet MTU */ | |
1451 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1452 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1453 | } else if (!info->in || !info->out) |
1454 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1455 | else { |
1456 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1457 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1458 | if (!(info->flags & FLAG_NO_SETINT)) | |
1459 | status = usb_set_interface (xdev, | |
1460 | interface->desc.bInterfaceNumber, | |
1461 | interface->desc.bAlternateSetting); | |
1462 | else | |
1463 | status = 0; | |
1464 | ||
1465 | } | |
9514bfe5 | 1466 | if (status >= 0 && dev->status) |
1da177e4 LT |
1467 | status = init_status (dev, udev); |
1468 | if (status < 0) | |
cb1cebbe | 1469 | goto out3; |
1da177e4 | 1470 | |
2e55cc72 DB |
1471 | if (!dev->rx_urb_size) |
1472 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1473 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1474 | |
225794f8 MH |
1475 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1476 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1477 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1478 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1479 | ||
1da177e4 LT |
1480 | status = register_netdev (net); |
1481 | if (status) | |
a4723848 | 1482 | goto out4; |
a475f603 JP |
1483 | netif_info(dev, probe, dev->net, |
1484 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1485 | udev->dev.driver->name, | |
1486 | xdev->bus->bus_name, xdev->devpath, | |
1487 | dev->driver_info->description, | |
1488 | net->dev_addr); | |
1da177e4 LT |
1489 | |
1490 | // ok, it's ready to go. | |
1491 | usb_set_intfdata (udev, dev); | |
1492 | ||
1da177e4 LT |
1493 | netif_device_attach (net); |
1494 | ||
37e8273c BH |
1495 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
1496 | netif_carrier_off(net); | |
1497 | ||
1da177e4 LT |
1498 | return 0; |
1499 | ||
a4723848 | 1500 | out4: |
1501 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1502 | out3: |
1503 | if (info->unbind) | |
1504 | info->unbind (dev, udev); | |
1505 | out1: | |
1506 | free_netdev(net); | |
1507 | out: | |
1da177e4 LT |
1508 | return status; |
1509 | } | |
38bde1d4 | 1510 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1511 | |
1512 | /*-------------------------------------------------------------------------*/ | |
1513 | ||
36433127 ON |
1514 | /* |
1515 | * suspend the whole driver as soon as the first interface is suspended | |
1516 | * resume only when the last interface is resumed | |
38bde1d4 | 1517 | */ |
1da177e4 | 1518 | |
38bde1d4 | 1519 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1520 | { |
1521 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1522 | |
36433127 | 1523 | if (!dev->suspend_count++) { |
69ee472f ON |
1524 | spin_lock_irq(&dev->txq.lock); |
1525 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1526 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1527 | dev->suspend_count--; |
69ee472f ON |
1528 | spin_unlock_irq(&dev->txq.lock); |
1529 | return -EBUSY; | |
1530 | } else { | |
1531 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1532 | spin_unlock_irq(&dev->txq.lock); | |
1533 | } | |
a11a6544 ON |
1534 | /* |
1535 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1536 | * having everything error out. |
1537 | */ | |
1538 | netif_device_detach (dev->net); | |
69ee472f ON |
1539 | usbnet_terminate_urbs(dev); |
1540 | usb_kill_urb(dev->interrupt); | |
1541 | ||
a11a6544 ON |
1542 | /* |
1543 | * reattach so runtime management can use and | |
1544 | * wake the device | |
1545 | */ | |
1546 | netif_device_attach (dev->net); | |
36433127 | 1547 | } |
1da177e4 LT |
1548 | return 0; |
1549 | } | |
38bde1d4 | 1550 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1551 | |
38bde1d4 | 1552 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1553 | { |
1554 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1555 | struct sk_buff *skb; |
1556 | struct urb *res; | |
1557 | int retval; | |
1558 | ||
1559 | if (!--dev->suspend_count) { | |
68972efa PS |
1560 | /* resume interrupt URBs */ |
1561 | if (dev->interrupt && test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1562 | usb_submit_urb(dev->interrupt, GFP_NOIO); | |
1563 | ||
69ee472f ON |
1564 | spin_lock_irq(&dev->txq.lock); |
1565 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1566 | ||
69ee472f ON |
1567 | skb = (struct sk_buff *)res->context; |
1568 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1569 | if (retval < 0) { | |
1570 | dev_kfree_skb_any(skb); | |
1571 | usb_free_urb(res); | |
1572 | usb_autopm_put_interface_async(dev->intf); | |
1573 | } else { | |
1574 | dev->net->trans_start = jiffies; | |
1575 | __skb_queue_tail(&dev->txq, skb); | |
1576 | } | |
1577 | } | |
1da177e4 | 1578 | |
69ee472f ON |
1579 | smp_mb(); |
1580 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1581 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1582 | |
1583 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
65841fd5 ML |
1584 | /* handle remote wakeup ASAP */ |
1585 | if (!dev->wait && | |
1586 | netif_device_present(dev->net) && | |
1587 | !timer_pending(&dev->delay) && | |
1588 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1589 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1590 | |
75bd0cbd | 1591 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1592 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1593 | tasklet_schedule (&dev->bh); |
1594 | } | |
69ee472f | 1595 | } |
5d9d01a3 ON |
1596 | |
1597 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1598 | usb_autopm_get_interface_no_resume(intf); | |
1599 | ||
1da177e4 LT |
1600 | return 0; |
1601 | } | |
38bde1d4 | 1602 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1603 | |
5d9d01a3 ON |
1604 | /* |
1605 | * Either a subdriver implements manage_power, then it is assumed to always | |
1606 | * be ready to be suspended or it reports the readiness to be suspended | |
1607 | * explicitly | |
1608 | */ | |
1609 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1610 | { | |
1611 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1612 | dev->intf->needs_remote_wakeup = 1; | |
1613 | usb_autopm_put_interface_async(dev->intf); | |
1614 | } | |
1615 | } | |
1616 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1617 | |
877bd862 | 1618 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1619 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1620 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1621 | { |
1622 | void *buf = NULL; | |
1623 | int err = -ENOMEM; | |
1624 | ||
1625 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1626 | " value=0x%04x index=0x%04x size=%d\n", | |
1627 | cmd, reqtype, value, index, size); | |
1628 | ||
1629 | if (data) { | |
1630 | buf = kmalloc(size, GFP_KERNEL); | |
1631 | if (!buf) | |
1632 | goto out; | |
1633 | } | |
1634 | ||
1635 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1636 | cmd, reqtype, value, index, buf, size, | |
1637 | USB_CTRL_GET_TIMEOUT); | |
1638 | if (err > 0 && err <= size) | |
1639 | memcpy(data, buf, err); | |
1640 | kfree(buf); | |
1641 | out: | |
1642 | return err; | |
1643 | } | |
877bd862 | 1644 | |
0547fad2 ML |
1645 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1646 | u16 value, u16 index, const void *data, | |
1647 | u16 size) | |
877bd862 ML |
1648 | { |
1649 | void *buf = NULL; | |
1650 | int err = -ENOMEM; | |
1651 | ||
1652 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1653 | " value=0x%04x index=0x%04x size=%d\n", | |
1654 | cmd, reqtype, value, index, size); | |
1655 | ||
1656 | if (data) { | |
1657 | buf = kmemdup(data, size, GFP_KERNEL); | |
1658 | if (!buf) | |
1659 | goto out; | |
1660 | } | |
1661 | ||
1662 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1663 | cmd, reqtype, value, index, buf, size, | |
1664 | USB_CTRL_SET_TIMEOUT); | |
1665 | kfree(buf); | |
1666 | ||
1667 | out: | |
1668 | return err; | |
1669 | } | |
0547fad2 ML |
1670 | |
1671 | /* | |
1672 | * The function can't be called inside suspend/resume callback, | |
1673 | * otherwise deadlock will be caused. | |
1674 | */ | |
1675 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1676 | u16 value, u16 index, void *data, u16 size) | |
1677 | { | |
6f0a0986 ML |
1678 | int ret; |
1679 | ||
1680 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1681 | return -ENODEV; | |
1682 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1683 | data, size); | |
1684 | usb_autopm_put_interface(dev->intf); | |
1685 | return ret; | |
0547fad2 ML |
1686 | } |
1687 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
1688 | ||
1689 | /* | |
1690 | * The function can't be called inside suspend/resume callback, | |
1691 | * otherwise deadlock will be caused. | |
1692 | */ | |
1693 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1694 | u16 value, u16 index, const void *data, u16 size) | |
1695 | { | |
6f0a0986 ML |
1696 | int ret; |
1697 | ||
1698 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1699 | return -ENODEV; | |
1700 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1701 | data, size); | |
1702 | usb_autopm_put_interface(dev->intf); | |
1703 | return ret; | |
0547fad2 | 1704 | } |
877bd862 ML |
1705 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
1706 | ||
0547fad2 ML |
1707 | /* |
1708 | * The function can be called inside suspend/resume callback safely | |
1709 | * and should only be called by suspend/resume callback generally. | |
1710 | */ | |
1711 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1712 | u16 value, u16 index, void *data, u16 size) | |
1713 | { | |
1714 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1715 | data, size); | |
1716 | } | |
1717 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
1718 | ||
1719 | /* | |
1720 | * The function can be called inside suspend/resume callback safely | |
1721 | * and should only be called by suspend/resume callback generally. | |
1722 | */ | |
1723 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1724 | u16 value, u16 index, const void *data, | |
1725 | u16 size) | |
1726 | { | |
1727 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1728 | data, size); | |
1729 | } | |
1730 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
1731 | ||
877bd862 ML |
1732 | static void usbnet_async_cmd_cb(struct urb *urb) |
1733 | { | |
1734 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
1735 | int status = urb->status; | |
1736 | ||
1737 | if (status < 0) | |
1738 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
1739 | __func__, status); | |
1740 | ||
1741 | kfree(req); | |
1742 | usb_free_urb(urb); | |
1743 | } | |
1744 | ||
0547fad2 ML |
1745 | /* |
1746 | * The caller must make sure that device can't be put into suspend | |
1747 | * state until the control URB completes. | |
1748 | */ | |
877bd862 ML |
1749 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
1750 | u16 value, u16 index, const void *data, u16 size) | |
1751 | { | |
1752 | struct usb_ctrlrequest *req = NULL; | |
1753 | struct urb *urb; | |
1754 | int err = -ENOMEM; | |
1755 | void *buf = NULL; | |
1756 | ||
1757 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1758 | " value=0x%04x index=0x%04x size=%d\n", | |
1759 | cmd, reqtype, value, index, size); | |
1760 | ||
1761 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
1762 | if (!urb) { | |
1763 | netdev_err(dev->net, "Error allocating URB in" | |
1764 | " %s!\n", __func__); | |
1765 | goto fail; | |
1766 | } | |
1767 | ||
1768 | if (data) { | |
1769 | buf = kmemdup(data, size, GFP_ATOMIC); | |
1770 | if (!buf) { | |
1771 | netdev_err(dev->net, "Error allocating buffer" | |
1772 | " in %s!\n", __func__); | |
1773 | goto fail_free; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
1778 | if (!req) { | |
1779 | netdev_err(dev->net, "Failed to allocate memory for %s\n", | |
1780 | __func__); | |
1781 | goto fail_free_buf; | |
1782 | } | |
1783 | ||
1784 | req->bRequestType = reqtype; | |
1785 | req->bRequest = cmd; | |
1786 | req->wValue = cpu_to_le16(value); | |
1787 | req->wIndex = cpu_to_le16(index); | |
1788 | req->wLength = cpu_to_le16(size); | |
1789 | ||
1790 | usb_fill_control_urb(urb, dev->udev, | |
1791 | usb_sndctrlpipe(dev->udev, 0), | |
1792 | (void *)req, buf, size, | |
1793 | usbnet_async_cmd_cb, req); | |
1794 | urb->transfer_flags |= URB_FREE_BUFFER; | |
1795 | ||
1796 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
1797 | if (err < 0) { | |
1798 | netdev_err(dev->net, "Error submitting the control" | |
1799 | " message: status=%d\n", err); | |
1800 | goto fail_free; | |
1801 | } | |
1802 | return 0; | |
1803 | ||
1804 | fail_free_buf: | |
1805 | kfree(buf); | |
1806 | fail_free: | |
1807 | kfree(req); | |
1808 | usb_free_urb(urb); | |
1809 | fail: | |
1810 | return err; | |
1811 | ||
1812 | } | |
1813 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
1814 | /*-------------------------------------------------------------------------*/ |
1815 | ||
f29fc259 | 1816 | static int __init usbnet_init(void) |
1da177e4 | 1817 | { |
c582a950 TF |
1818 | /* Compiler should optimize this out. */ |
1819 | BUILD_BUG_ON( | |
1820 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 1821 | |
c7e12ead | 1822 | eth_random_addr(node_id); |
cb1cebbe | 1823 | return 0; |
1da177e4 | 1824 | } |
f29fc259 | 1825 | module_init(usbnet_init); |
1da177e4 | 1826 | |
f29fc259 | 1827 | static void __exit usbnet_exit(void) |
1da177e4 | 1828 | { |
1da177e4 | 1829 | } |
f29fc259 | 1830 | module_exit(usbnet_exit); |
1da177e4 | 1831 | |
f29fc259 | 1832 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 1833 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 1834 | MODULE_LICENSE("GPL"); |