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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 | |
9cb00073 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
1da177e4 LT |
18 | */ |
19 | ||
20 | /* | |
21 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
22 | * kinds of full and high speed networking devices: host-to-host cables, |
23 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 24 | * |
090ffa9d DB |
25 | * These devices usually differ in terms of control protocols (if they |
26 | * even have one!) and sometimes they define new framing to wrap or batch | |
27 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
28 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
29 | * issues can usefully be addressed by this framework. | |
30 | */ | |
1da177e4 LT |
31 | |
32 | // #define DEBUG // error path messages, extra info | |
33 | // #define VERBOSE // more; success messages | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/etherdevice.h> | |
03ad032b | 39 | #include <linux/ctype.h> |
1da177e4 LT |
40 | #include <linux/ethtool.h> |
41 | #include <linux/workqueue.h> | |
42 | #include <linux/mii.h> | |
1da177e4 | 43 | #include <linux/usb.h> |
3692e94f | 44 | #include <linux/usb/usbnet.h> |
c40a2c88 | 45 | #include <linux/usb/cdc.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 | 61 | * |
a88c32ae ML |
62 | * The goal is to let the USB host controller be busy for 5msec or |
63 | * more before an irq is required, under load. Jumbograms change | |
64 | * the equation. | |
1da177e4 | 65 | */ |
a88c32ae ML |
66 | #define MAX_QUEUE_MEMORY (60 * 1518) |
67 | #define RX_QLEN(dev) ((dev)->rx_qlen) | |
68 | #define TX_QLEN(dev) ((dev)->tx_qlen) | |
1da177e4 | 69 | |
1da177e4 LT |
70 | // reawaken network queue this soon after stopping; else watchdog barks |
71 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
72 | ||
37ebb549 PM |
73 | /* throttle rx/tx briefly after some faults, so hub_wq might disconnect() |
74 | * us (it polls at HZ/4 usually) before we report too many false errors. | |
75 | */ | |
1da177e4 LT |
76 | #define THROTTLE_JIFFIES (HZ/8) |
77 | ||
1da177e4 LT |
78 | // between wakeups |
79 | #define UNLINK_TIMEOUT_MS 3 | |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
83 | // randomly generated ethernet address | |
84 | static u8 node_id [ETH_ALEN]; | |
85 | ||
1da177e4 LT |
86 | static const char driver_name [] = "usbnet"; |
87 | ||
88 | /* use ethtool to change the level for any given device */ | |
89 | static int msg_level = -1; | |
90 | module_param (msg_level, int, 0); | |
91 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
92 | ||
1da177e4 LT |
93 | /*-------------------------------------------------------------------------*/ |
94 | ||
1da177e4 | 95 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 96 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
97 | { |
98 | int tmp; | |
99 | struct usb_host_interface *alt = NULL; | |
100 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
101 | struct usb_host_endpoint *status = NULL; | |
102 | ||
103 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
104 | unsigned ep; | |
105 | ||
106 | in = out = status = NULL; | |
107 | alt = intf->altsetting + tmp; | |
108 | ||
109 | /* take the first altsetting with in-bulk + out-bulk; | |
110 | * remember any status endpoint, just in case; | |
70f23fd6 | 111 | * ignore other endpoints and altsettings. |
1da177e4 LT |
112 | */ |
113 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
114 | struct usb_host_endpoint *e; | |
115 | int intr = 0; | |
116 | ||
117 | e = alt->endpoint + ep; | |
118 | switch (e->desc.bmAttributes) { | |
119 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 120 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
121 | continue; |
122 | intr = 1; | |
123 | /* FALLTHROUGH */ | |
124 | case USB_ENDPOINT_XFER_BULK: | |
125 | break; | |
126 | default: | |
127 | continue; | |
128 | } | |
fc6e2544 | 129 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
130 | if (!intr && !in) |
131 | in = e; | |
132 | else if (intr && !status) | |
133 | status = e; | |
134 | } else { | |
135 | if (!out) | |
136 | out = e; | |
137 | } | |
138 | } | |
139 | if (in && out) | |
140 | break; | |
141 | } | |
142 | if (!alt || !in || !out) | |
143 | return -EINVAL; | |
144 | ||
8e95a202 JP |
145 | if (alt->desc.bAlternateSetting != 0 || |
146 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
147 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
148 | alt->desc.bAlternateSetting); | |
149 | if (tmp < 0) | |
150 | return tmp; | |
151 | } | |
cb1cebbe | 152 | |
1da177e4 LT |
153 | dev->in = usb_rcvbulkpipe (dev->udev, |
154 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
155 | dev->out = usb_sndbulkpipe (dev->udev, | |
156 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
157 | dev->status = status; | |
158 | return 0; | |
159 | } | |
2e55cc72 | 160 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 161 | |
03ad032b PH |
162 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
163 | { | |
51487ae7 | 164 | int tmp = -1, ret; |
03ad032b PH |
165 | unsigned char buf [13]; |
166 | ||
51487ae7 AS |
167 | ret = usb_string(dev->udev, iMACAddress, buf, sizeof buf); |
168 | if (ret == 12) | |
169 | tmp = hex2bin(dev->net->dev_addr, buf, 6); | |
170 | if (tmp < 0) { | |
03ad032b PH |
171 | dev_dbg(&dev->udev->dev, |
172 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
51487ae7 AS |
173 | if (ret >= 0) |
174 | ret = -EINVAL; | |
175 | return ret; | |
03ad032b | 176 | } |
03ad032b PH |
177 | return 0; |
178 | } | |
179 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
180 | ||
24ead299 | 181 | static void intr_complete (struct urb *urb) |
182 | { | |
183 | struct usbnet *dev = urb->context; | |
184 | int status = urb->status; | |
185 | ||
186 | switch (status) { | |
187 | /* success */ | |
188 | case 0: | |
189 | dev->driver_info->status(dev, urb); | |
190 | break; | |
191 | ||
192 | /* software-driven interface shutdown */ | |
193 | case -ENOENT: /* urb killed */ | |
194 | case -ESHUTDOWN: /* hardware gone */ | |
195 | netif_dbg(dev, ifdown, dev->net, | |
196 | "intr shutdown, code %d\n", status); | |
197 | return; | |
198 | ||
199 | /* NOTE: not throttling like RX/TX, since this endpoint | |
200 | * already polls infrequently | |
201 | */ | |
202 | default: | |
203 | netdev_dbg(dev->net, "intr status %d\n", status); | |
204 | break; | |
205 | } | |
206 | ||
24ead299 | 207 | status = usb_submit_urb (urb, GFP_ATOMIC); |
208 | if (status != 0) | |
209 | netif_err(dev, timer, dev->net, | |
210 | "intr resubmit --> %d\n", status); | |
211 | } | |
1da177e4 LT |
212 | |
213 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
214 | { | |
215 | char *buf = NULL; | |
216 | unsigned pipe = 0; | |
217 | unsigned maxp; | |
218 | unsigned period; | |
219 | ||
220 | if (!dev->driver_info->status) | |
221 | return 0; | |
222 | ||
223 | pipe = usb_rcvintpipe (dev->udev, | |
224 | dev->status->desc.bEndpointAddress | |
225 | & USB_ENDPOINT_NUMBER_MASK); | |
226 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
227 | ||
228 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
229 | period = max ((int) dev->status->desc.bInterval, | |
230 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
231 | ||
e94b1766 | 232 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 233 | if (buf) { |
e94b1766 | 234 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
235 | if (!dev->interrupt) { |
236 | kfree (buf); | |
237 | return -ENOMEM; | |
238 | } else { | |
239 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
240 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 241 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
242 | dev_dbg(&intf->dev, |
243 | "status ep%din, %d bytes period %d\n", | |
244 | usb_pipeendpoint(pipe), maxp, period); | |
245 | } | |
246 | } | |
18ab458f | 247 | return 0; |
1da177e4 LT |
248 | } |
249 | ||
6eecdc5f DW |
250 | /* Submit the interrupt URB if not previously submitted, increasing refcount */ |
251 | int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags) | |
252 | { | |
253 | int ret = 0; | |
254 | ||
255 | WARN_ON_ONCE(dev->interrupt == NULL); | |
256 | if (dev->interrupt) { | |
257 | mutex_lock(&dev->interrupt_mutex); | |
258 | ||
259 | if (++dev->interrupt_count == 1) | |
260 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
261 | ||
262 | dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n", | |
263 | dev->interrupt_count); | |
264 | mutex_unlock(&dev->interrupt_mutex); | |
265 | } | |
266 | return ret; | |
267 | } | |
268 | EXPORT_SYMBOL_GPL(usbnet_status_start); | |
269 | ||
270 | /* For resume; submit interrupt URB if previously submitted */ | |
271 | static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags) | |
272 | { | |
273 | int ret = 0; | |
274 | ||
275 | mutex_lock(&dev->interrupt_mutex); | |
276 | if (dev->interrupt_count) { | |
277 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
278 | dev_dbg(&dev->udev->dev, | |
279 | "submitted interrupt URB for resume\n"); | |
280 | } | |
281 | mutex_unlock(&dev->interrupt_mutex); | |
282 | return ret; | |
283 | } | |
284 | ||
285 | /* Kill the interrupt URB if all submitters want it killed */ | |
286 | void usbnet_status_stop(struct usbnet *dev) | |
287 | { | |
288 | if (dev->interrupt) { | |
289 | mutex_lock(&dev->interrupt_mutex); | |
290 | WARN_ON(dev->interrupt_count == 0); | |
291 | ||
292 | if (dev->interrupt_count && --dev->interrupt_count == 0) | |
293 | usb_kill_urb(dev->interrupt); | |
294 | ||
295 | dev_dbg(&dev->udev->dev, | |
296 | "decremented interrupt URB count to %d\n", | |
297 | dev->interrupt_count); | |
298 | mutex_unlock(&dev->interrupt_mutex); | |
299 | } | |
300 | } | |
301 | EXPORT_SYMBOL_GPL(usbnet_status_stop); | |
302 | ||
303 | /* For suspend; always kill interrupt URB */ | |
304 | static void __usbnet_status_stop_force(struct usbnet *dev) | |
305 | { | |
306 | if (dev->interrupt) { | |
307 | mutex_lock(&dev->interrupt_mutex); | |
308 | usb_kill_urb(dev->interrupt); | |
309 | dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n"); | |
310 | mutex_unlock(&dev->interrupt_mutex); | |
311 | } | |
312 | } | |
313 | ||
2e55cc72 DB |
314 | /* Passes this packet up the stack, updating its accounting. |
315 | * Some link protocols batch packets, so their rx_fixup paths | |
316 | * can return clones as well as just modify the original skb. | |
317 | */ | |
318 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
319 | { |
320 | int status; | |
321 | ||
7834ddbc JK |
322 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
323 | skb_queue_tail(&dev->rxq_pause, skb); | |
324 | return; | |
325 | } | |
326 | ||
81e0ce79 BM |
327 | /* only update if unset to allow minidriver rx_fixup override */ |
328 | if (skb->protocol == 0) | |
329 | skb->protocol = eth_type_trans (skb, dev->net); | |
330 | ||
7963837f HX |
331 | dev->net->stats.rx_packets++; |
332 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 333 | |
a475f603 JP |
334 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
335 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 336 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
337 | |
338 | if (skb_defer_rx_timestamp(skb)) | |
339 | return; | |
340 | ||
1da177e4 | 341 | status = netif_rx (skb); |
a475f603 JP |
342 | if (status != NET_RX_SUCCESS) |
343 | netif_dbg(dev, rx_err, dev->net, | |
344 | "netif_rx status %d\n", status); | |
1da177e4 | 345 | } |
2e55cc72 | 346 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 347 | |
a88c32ae ML |
348 | /* must be called if hard_mtu or rx_urb_size changed */ |
349 | void usbnet_update_max_qlen(struct usbnet *dev) | |
350 | { | |
351 | enum usb_device_speed speed = dev->udev->speed; | |
352 | ||
353 | switch (speed) { | |
354 | case USB_SPEED_HIGH: | |
355 | dev->rx_qlen = MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
356 | dev->tx_qlen = MAX_QUEUE_MEMORY / dev->hard_mtu; | |
357 | break; | |
452c447a ML |
358 | case USB_SPEED_SUPER: |
359 | /* | |
360 | * Not take default 5ms qlen for super speed HC to | |
361 | * save memory, and iperf tests show 2.5ms qlen can | |
362 | * work well | |
363 | */ | |
364 | dev->rx_qlen = 5 * MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
365 | dev->tx_qlen = 5 * MAX_QUEUE_MEMORY / dev->hard_mtu; | |
366 | break; | |
a88c32ae ML |
367 | default: |
368 | dev->rx_qlen = dev->tx_qlen = 4; | |
369 | } | |
370 | } | |
371 | EXPORT_SYMBOL_GPL(usbnet_update_max_qlen); | |
372 | ||
1da177e4 LT |
373 | \f |
374 | /*------------------------------------------------------------------------- | |
375 | * | |
376 | * Network Device Driver (peer link to "Host Device", from USB host) | |
377 | * | |
378 | *-------------------------------------------------------------------------*/ | |
379 | ||
777baa47 | 380 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
381 | { |
382 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 383 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
384 | int old_hard_mtu = dev->hard_mtu; |
385 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 386 | |
a99c1949 | 387 | if (new_mtu <= 0) |
1da177e4 | 388 | return -EINVAL; |
1da177e4 | 389 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 390 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
391 | return -EDOM; |
392 | net->mtu = new_mtu; | |
a99c1949 JP |
393 | |
394 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
395 | if (dev->rx_urb_size == old_hard_mtu) { | |
396 | dev->rx_urb_size = dev->hard_mtu; | |
397 | if (dev->rx_urb_size > old_rx_urb_size) | |
398 | usbnet_unlink_rx_urbs(dev); | |
399 | } | |
400 | ||
a88c32ae ML |
401 | /* max qlen depend on hard_mtu and rx_urb_size */ |
402 | usbnet_update_max_qlen(dev); | |
403 | ||
1da177e4 LT |
404 | return 0; |
405 | } | |
777baa47 | 406 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 | 407 | |
5b6e9bcd ML |
408 | /* The caller must hold list->lock */ |
409 | static void __usbnet_queue_skb(struct sk_buff_head *list, | |
410 | struct sk_buff *newsk, enum skb_state state) | |
411 | { | |
412 | struct skb_data *entry = (struct skb_data *) newsk->cb; | |
413 | ||
414 | __skb_queue_tail(list, newsk); | |
415 | entry->state = state; | |
416 | } | |
417 | ||
1da177e4 LT |
418 | /*-------------------------------------------------------------------------*/ |
419 | ||
1da177e4 LT |
420 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
421 | * completion callbacks. 2.5 should have fixed those bugs... | |
422 | */ | |
423 | ||
5b6e9bcd ML |
424 | static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb, |
425 | struct sk_buff_head *list, enum skb_state state) | |
1da177e4 | 426 | { |
1da177e4 | 427 | unsigned long flags; |
5b6e9bcd ML |
428 | enum skb_state old_state; |
429 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1da177e4 | 430 | |
8728b834 | 431 | spin_lock_irqsave(&list->lock, flags); |
5b6e9bcd ML |
432 | old_state = entry->state; |
433 | entry->state = state; | |
8728b834 | 434 | __skb_unlink(skb, list); |
fcb0bb6a ES |
435 | |
436 | /* defer_bh() is never called with list == &dev->done. | |
437 | * spin_lock_nested() tells lockdep that it is OK to take | |
438 | * dev->done.lock here with list->lock held. | |
439 | */ | |
440 | spin_lock_nested(&dev->done.lock, SINGLE_DEPTH_NESTING); | |
441 | ||
8728b834 | 442 | __skb_queue_tail(&dev->done, skb); |
1da177e4 | 443 | if (dev->done.qlen == 1) |
8728b834 | 444 | tasklet_schedule(&dev->bh); |
fcb0bb6a ES |
445 | spin_unlock(&dev->done.lock); |
446 | spin_unlock_irqrestore(&list->lock, flags); | |
5b6e9bcd | 447 | return old_state; |
1da177e4 LT |
448 | } |
449 | ||
450 | /* some work can't be done in tasklets, so we use keventd | |
451 | * | |
452 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
453 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
454 | */ | |
2e55cc72 | 455 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
456 | { |
457 | set_bit (work, &dev->flags); | |
9532021d SG |
458 | if (!schedule_work (&dev->kevent)) { |
459 | if (net_ratelimit()) | |
460 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
461 | } else { | |
60b86755 | 462 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 463 | } |
1da177e4 | 464 | } |
2e55cc72 | 465 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
466 | |
467 | /*-------------------------------------------------------------------------*/ | |
468 | ||
7d12e780 | 469 | static void rx_complete (struct urb *urb); |
1da177e4 | 470 | |
dacb3975 | 471 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
472 | { |
473 | struct sk_buff *skb; | |
474 | struct skb_data *entry; | |
475 | int retval = 0; | |
476 | unsigned long lockflags; | |
2e55cc72 | 477 | size_t size = dev->rx_urb_size; |
1da177e4 | 478 | |
70c37bf9 BM |
479 | /* prevent rx skb allocation when error ratio is high */ |
480 | if (test_bit(EVENT_RX_KILL, &dev->flags)) { | |
481 | usb_free_urb(urb); | |
482 | return -ENOLINK; | |
483 | } | |
484 | ||
7bdd4027 ED |
485 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
486 | if (!skb) { | |
a475f603 | 487 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 488 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 489 | usb_free_urb (urb); |
dacb3975 | 490 | return -ENOMEM; |
1da177e4 | 491 | } |
1da177e4 LT |
492 | |
493 | entry = (struct skb_data *) skb->cb; | |
494 | entry->urb = urb; | |
495 | entry->dev = dev; | |
1da177e4 LT |
496 | entry->length = 0; |
497 | ||
498 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
499 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
500 | |
501 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
502 | ||
8e95a202 JP |
503 | if (netif_running (dev->net) && |
504 | netif_device_present (dev->net) && | |
69ee472f ON |
505 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
506 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 507 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 508 | case -EPIPE: |
2e55cc72 | 509 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
510 | break; |
511 | case -ENOMEM: | |
2e55cc72 | 512 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
513 | break; |
514 | case -ENODEV: | |
a475f603 | 515 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
516 | netif_device_detach (dev->net); |
517 | break; | |
dacb3975 DM |
518 | case -EHOSTUNREACH: |
519 | retval = -ENOLINK; | |
520 | break; | |
1da177e4 | 521 | default: |
a475f603 JP |
522 | netif_dbg(dev, rx_err, dev->net, |
523 | "rx submit, %d\n", retval); | |
1da177e4 LT |
524 | tasklet_schedule (&dev->bh); |
525 | break; | |
526 | case 0: | |
5b6e9bcd | 527 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
528 | } |
529 | } else { | |
a475f603 | 530 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
531 | retval = -ENOLINK; |
532 | } | |
533 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
534 | if (retval) { | |
535 | dev_kfree_skb_any (skb); | |
536 | usb_free_urb (urb); | |
537 | } | |
dacb3975 | 538 | return retval; |
1da177e4 LT |
539 | } |
540 | ||
541 | ||
542 | /*-------------------------------------------------------------------------*/ | |
543 | ||
544 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
545 | { | |
8e95a202 | 546 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
547 | !dev->driver_info->rx_fixup (dev, skb)) { |
548 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
549 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
550 | dev->net->stats.rx_errors++; | |
551 | goto done; | |
552 | } | |
1da177e4 LT |
553 | // else network stack removes extra byte if we forced a short packet |
554 | ||
eb85569f EG |
555 | /* all data was already cloned from skb inside the driver */ |
556 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
557 | goto done; | |
558 | ||
559 | if (skb->len < ETH_HLEN) { | |
560 | dev->net->stats.rx_errors++; | |
561 | dev->net->stats.rx_length_errors++; | |
562 | netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len); | |
563 | } else { | |
564 | usbnet_skb_return(dev, skb); | |
073285fd | 565 | return; |
1da177e4 | 566 | } |
073285fd | 567 | |
7a635ea9 | 568 | done: |
073285fd | 569 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
570 | } |
571 | ||
572 | /*-------------------------------------------------------------------------*/ | |
573 | ||
7d12e780 | 574 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
575 | { |
576 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
577 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
578 | struct usbnet *dev = entry->dev; | |
579 | int urb_status = urb->status; | |
5b6e9bcd | 580 | enum skb_state state; |
1da177e4 LT |
581 | |
582 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 583 | state = rx_done; |
1da177e4 LT |
584 | entry->urb = NULL; |
585 | ||
586 | switch (urb_status) { | |
18ab458f DB |
587 | /* success */ |
588 | case 0: | |
1da177e4 LT |
589 | break; |
590 | ||
18ab458f DB |
591 | /* stalls need manual reset. this is rare ... except that |
592 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 593 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
594 | * storm, recovering as needed. |
595 | */ | |
596 | case -EPIPE: | |
7963837f | 597 | dev->net->stats.rx_errors++; |
2e55cc72 | 598 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
599 | // FALLTHROUGH |
600 | ||
18ab458f DB |
601 | /* software-driven interface shutdown */ |
602 | case -ECONNRESET: /* async unlink */ | |
603 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
604 | netif_dbg(dev, ifdown, dev->net, |
605 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
606 | goto block; |
607 | ||
37ebb549 | 608 | /* we get controller i/o faults during hub_wq disconnect() delays. |
18ab458f | 609 | * throttle down resubmits, to avoid log floods; just temporarily, |
37ebb549 | 610 | * so we still recover when the fault isn't a hub_wq delay. |
18ab458f DB |
611 | */ |
612 | case -EPROTO: | |
613 | case -ETIME: | |
614 | case -EILSEQ: | |
7963837f | 615 | dev->net->stats.rx_errors++; |
1da177e4 LT |
616 | if (!timer_pending (&dev->delay)) { |
617 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
618 | netif_dbg(dev, link, dev->net, |
619 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
620 | } |
621 | block: | |
5b6e9bcd | 622 | state = rx_cleanup; |
1da177e4 LT |
623 | entry->urb = urb; |
624 | urb = NULL; | |
625 | break; | |
626 | ||
18ab458f DB |
627 | /* data overrun ... flush fifo? */ |
628 | case -EOVERFLOW: | |
7963837f | 629 | dev->net->stats.rx_over_errors++; |
1da177e4 | 630 | // FALLTHROUGH |
cb1cebbe | 631 | |
18ab458f | 632 | default: |
5b6e9bcd | 633 | state = rx_cleanup; |
7963837f | 634 | dev->net->stats.rx_errors++; |
a475f603 | 635 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
636 | break; |
637 | } | |
638 | ||
70c37bf9 BM |
639 | /* stop rx if packet error rate is high */ |
640 | if (++dev->pkt_cnt > 30) { | |
641 | dev->pkt_cnt = 0; | |
642 | dev->pkt_err = 0; | |
643 | } else { | |
644 | if (state == rx_cleanup) | |
645 | dev->pkt_err++; | |
646 | if (dev->pkt_err > 20) | |
647 | set_bit(EVENT_RX_KILL, &dev->flags); | |
648 | } | |
649 | ||
5b6e9bcd | 650 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
651 | |
652 | if (urb) { | |
8e95a202 | 653 | if (netif_running (dev->net) && |
5b6e9bcd ML |
654 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
655 | state != unlink_start) { | |
1da177e4 | 656 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 657 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
658 | return; |
659 | } | |
660 | usb_free_urb (urb); | |
661 | } | |
a475f603 | 662 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
663 | } |
664 | ||
7834ddbc JK |
665 | /*-------------------------------------------------------------------------*/ |
666 | void usbnet_pause_rx(struct usbnet *dev) | |
667 | { | |
668 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
669 | ||
a475f603 | 670 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
671 | } |
672 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
673 | ||
674 | void usbnet_resume_rx(struct usbnet *dev) | |
675 | { | |
676 | struct sk_buff *skb; | |
677 | int num = 0; | |
678 | ||
679 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
680 | ||
681 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
682 | usbnet_skb_return(dev, skb); | |
683 | num++; | |
684 | } | |
685 | ||
686 | tasklet_schedule(&dev->bh); | |
687 | ||
a475f603 JP |
688 | netif_dbg(dev, rx_status, dev->net, |
689 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
690 | } |
691 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
692 | ||
693 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
694 | { | |
695 | skb_queue_purge(&dev->rxq_pause); | |
696 | } | |
697 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
698 | ||
1da177e4 LT |
699 | /*-------------------------------------------------------------------------*/ |
700 | ||
701 | // unlink pending rx/tx; completion handlers do all other cleanup | |
702 | ||
703 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
704 | { | |
705 | unsigned long flags; | |
5b6e9bcd | 706 | struct sk_buff *skb; |
1da177e4 LT |
707 | int count = 0; |
708 | ||
709 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 710 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
711 | struct skb_data *entry; |
712 | struct urb *urb; | |
713 | int retval; | |
714 | ||
5b6e9bcd ML |
715 | skb_queue_walk(q, skb) { |
716 | entry = (struct skb_data *) skb->cb; | |
717 | if (entry->state != unlink_start) | |
718 | goto found; | |
719 | } | |
720 | break; | |
721 | found: | |
722 | entry->state = unlink_start; | |
1da177e4 | 723 | urb = entry->urb; |
1da177e4 | 724 | |
0956a8c2 | 725 | /* |
726 | * Get reference count of the URB to avoid it to be | |
727 | * freed during usb_unlink_urb, which may trigger | |
728 | * use-after-free problem inside usb_unlink_urb since | |
729 | * usb_unlink_urb is always racing with .complete | |
730 | * handler(include defer_bh). | |
731 | */ | |
732 | usb_get_urb(urb); | |
4231d47e | 733 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
734 | // during some PM-driven resume scenarios, |
735 | // these (async) unlinks complete immediately | |
736 | retval = usb_unlink_urb (urb); | |
737 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 738 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
739 | else |
740 | count++; | |
0956a8c2 | 741 | usb_put_urb(urb); |
4231d47e | 742 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
743 | } |
744 | spin_unlock_irqrestore (&q->lock, flags); | |
745 | return count; | |
746 | } | |
747 | ||
a99c1949 JP |
748 | // Flush all pending rx urbs |
749 | // minidrivers may need to do this when the MTU changes | |
750 | ||
751 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
752 | { | |
753 | if (netif_running(dev->net)) { | |
754 | (void) unlink_urbs (dev, &dev->rxq); | |
755 | tasklet_schedule(&dev->bh); | |
756 | } | |
757 | } | |
758 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
759 | |
760 | /*-------------------------------------------------------------------------*/ | |
761 | ||
fcb0bb6a ES |
762 | static void wait_skb_queue_empty(struct sk_buff_head *q) |
763 | { | |
764 | unsigned long flags; | |
765 | ||
766 | spin_lock_irqsave(&q->lock, flags); | |
767 | while (!skb_queue_empty(q)) { | |
768 | spin_unlock_irqrestore(&q->lock, flags); | |
769 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); | |
770 | set_current_state(TASK_UNINTERRUPTIBLE); | |
771 | spin_lock_irqsave(&q->lock, flags); | |
772 | } | |
773 | spin_unlock_irqrestore(&q->lock, flags); | |
774 | } | |
775 | ||
1da177e4 | 776 | // precondition: never called in_interrupt |
69ee472f ON |
777 | static void usbnet_terminate_urbs(struct usbnet *dev) |
778 | { | |
69ee472f ON |
779 | DECLARE_WAITQUEUE(wait, current); |
780 | int temp; | |
781 | ||
782 | /* ensure there are no more active urbs */ | |
14a0d635 | 783 | add_wait_queue(&dev->wait, &wait); |
69ee472f | 784 | set_current_state(TASK_UNINTERRUPTIBLE); |
69ee472f ON |
785 | temp = unlink_urbs(dev, &dev->txq) + |
786 | unlink_urbs(dev, &dev->rxq); | |
787 | ||
788 | /* maybe wait for deletions to finish. */ | |
fcb0bb6a ES |
789 | wait_skb_queue_empty(&dev->rxq); |
790 | wait_skb_queue_empty(&dev->txq); | |
791 | wait_skb_queue_empty(&dev->done); | |
792 | netif_dbg(dev, ifdown, dev->net, | |
793 | "waited for %d urb completions\n", temp); | |
69ee472f | 794 | set_current_state(TASK_RUNNING); |
14a0d635 | 795 | remove_wait_queue(&dev->wait, &wait); |
69ee472f | 796 | } |
1da177e4 | 797 | |
777baa47 | 798 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
799 | { |
800 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 801 | struct driver_info *info = dev->driver_info; |
f50791ac | 802 | int retval, pm, mpn; |
1da177e4 | 803 | |
75bd0cbd | 804 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
805 | netif_stop_queue (net); |
806 | ||
a475f603 | 807 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 808 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
809 | net->stats.rx_packets, net->stats.tx_packets, |
810 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 811 | |
14a0d635 ON |
812 | /* to not race resume */ |
813 | pm = usb_autopm_get_interface(dev->intf); | |
a33e9e7f JK |
814 | /* allow minidriver to stop correctly (wireless devices to turn off |
815 | * radio etc) */ | |
816 | if (info->stop) { | |
817 | retval = info->stop(dev); | |
a475f603 JP |
818 | if (retval < 0) |
819 | netif_info(dev, ifdown, dev->net, | |
820 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
821 | retval, | |
822 | dev->udev->bus->bus_name, dev->udev->devpath, | |
823 | info->description); | |
a33e9e7f JK |
824 | } |
825 | ||
69ee472f ON |
826 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
827 | usbnet_terminate_urbs(dev); | |
1da177e4 | 828 | |
6eecdc5f | 829 | usbnet_status_stop(dev); |
1da177e4 | 830 | |
7834ddbc JK |
831 | usbnet_purge_paused_rxq(dev); |
832 | ||
f50791ac ES |
833 | mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags); |
834 | ||
1da177e4 LT |
835 | /* deferred work (task, timer, softirq) must also stop. |
836 | * can't flush_scheduled_work() until we drop rtnl (later), | |
837 | * else workers could deadlock; so make workers a NOP. | |
838 | */ | |
839 | dev->flags = 0; | |
840 | del_timer_sync (&dev->delay); | |
841 | tasklet_kill (&dev->bh); | |
14a0d635 ON |
842 | if (!pm) |
843 | usb_autopm_put_interface(dev->intf); | |
844 | ||
f50791ac | 845 | if (info->manage_power && mpn) |
69ee472f ON |
846 | info->manage_power(dev, 0); |
847 | else | |
848 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
849 | |
850 | return 0; | |
851 | } | |
777baa47 | 852 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
853 | |
854 | /*-------------------------------------------------------------------------*/ | |
855 | ||
856 | // posts reads, and enables write queuing | |
857 | ||
858 | // precondition: never called in_interrupt | |
859 | ||
777baa47 | 860 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
861 | { |
862 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 863 | int retval; |
1da177e4 LT |
864 | struct driver_info *info = dev->driver_info; |
865 | ||
a11a6544 | 866 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
867 | netif_info(dev, ifup, dev->net, |
868 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
869 | retval, | |
870 | dev->udev->bus->bus_name, | |
871 | dev->udev->devpath, | |
872 | info->description); | |
a11a6544 ON |
873 | goto done_nopm; |
874 | } | |
875 | ||
1da177e4 LT |
876 | // put into "known safe" state |
877 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
878 | netif_info(dev, ifup, dev->net, |
879 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
880 | retval, | |
881 | dev->udev->bus->bus_name, | |
882 | dev->udev->devpath, | |
883 | info->description); | |
1da177e4 LT |
884 | goto done; |
885 | } | |
886 | ||
a88c32ae ML |
887 | /* hard_mtu or rx_urb_size may change in reset() */ |
888 | usbnet_update_max_qlen(dev); | |
889 | ||
1da177e4 LT |
890 | // insist peer be connected |
891 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 892 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
893 | goto done; |
894 | } | |
895 | ||
896 | /* start any status interrupt transfer */ | |
897 | if (dev->interrupt) { | |
6eecdc5f | 898 | retval = usbnet_status_start(dev, GFP_KERNEL); |
1da177e4 | 899 | if (retval < 0) { |
a475f603 JP |
900 | netif_err(dev, ifup, dev->net, |
901 | "intr submit %d\n", retval); | |
1da177e4 LT |
902 | goto done; |
903 | } | |
904 | } | |
905 | ||
68972efa | 906 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 907 | netif_start_queue (net); |
a475f603 JP |
908 | netif_info(dev, ifup, dev->net, |
909 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
910 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
911 | dev->net->mtu, | |
912 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
913 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
914 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
915 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
916 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
917 | "simple"); | |
1da177e4 | 918 | |
70c37bf9 BM |
919 | /* reset rx error state */ |
920 | dev->pkt_cnt = 0; | |
921 | dev->pkt_err = 0; | |
922 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
923 | ||
1da177e4 LT |
924 | // delay posting reads until we're fully open |
925 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
926 | if (info->manage_power) { |
927 | retval = info->manage_power(dev, 1); | |
a1c088e0 ON |
928 | if (retval < 0) { |
929 | retval = 0; | |
930 | set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); | |
931 | } else { | |
932 | usb_autopm_put_interface(dev->intf); | |
933 | } | |
69ee472f | 934 | } |
a11a6544 | 935 | return retval; |
1da177e4 | 936 | done: |
a11a6544 ON |
937 | usb_autopm_put_interface(dev->intf); |
938 | done_nopm: | |
1da177e4 LT |
939 | return retval; |
940 | } | |
777baa47 | 941 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
942 | |
943 | /*-------------------------------------------------------------------------*/ | |
944 | ||
2e55cc72 DB |
945 | /* ethtool methods; minidrivers may need to add some more, but |
946 | * they'll probably want to use this base set. | |
947 | */ | |
948 | ||
c41286fd AB |
949 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
950 | { | |
951 | struct usbnet *dev = netdev_priv(net); | |
952 | ||
953 | if (!dev->mii.mdio_read) | |
954 | return -EOPNOTSUPP; | |
955 | ||
956 | return mii_ethtool_gset(&dev->mii, cmd); | |
957 | } | |
958 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
959 | ||
960 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
961 | { | |
962 | struct usbnet *dev = netdev_priv(net); | |
963 | int retval; | |
964 | ||
965 | if (!dev->mii.mdio_write) | |
966 | return -EOPNOTSUPP; | |
967 | ||
968 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
969 | ||
970 | /* link speed/duplex might have changed */ | |
971 | if (dev->driver_info->link_reset) | |
972 | dev->driver_info->link_reset(dev); | |
973 | ||
a88c32ae ML |
974 | /* hard_mtu or rx_urb_size may change in link_reset() */ |
975 | usbnet_update_max_qlen(dev); | |
976 | ||
c41286fd AB |
977 | return retval; |
978 | ||
979 | } | |
980 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
981 | ||
c41286fd | 982 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
983 | { |
984 | struct usbnet *dev = netdev_priv(net); | |
985 | ||
f29fc259 | 986 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
987 | if (dev->driver_info->check_connect) |
988 | return dev->driver_info->check_connect (dev) == 0; | |
989 | ||
c41286fd AB |
990 | /* if the device has mii operations, use those */ |
991 | if (dev->mii.mdio_read) | |
992 | return mii_link_ok(&dev->mii); | |
993 | ||
05ffb3e2 BM |
994 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
995 | return ethtool_op_get_link(net); | |
1da177e4 | 996 | } |
c41286fd | 997 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 998 | |
18ee91fa | 999 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
1000 | { |
1001 | struct usbnet *dev = netdev_priv(net); | |
1002 | ||
18ee91fa DB |
1003 | if (!dev->mii.mdio_write) |
1004 | return -EOPNOTSUPP; | |
1005 | ||
1006 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 1007 | } |
18ee91fa | 1008 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 1009 | |
18ee91fa | 1010 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
1011 | { |
1012 | struct usbnet *dev = netdev_priv(net); | |
1013 | ||
86a2f415 PS |
1014 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
1015 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
1016 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
1017 | sizeof info->fw_version); |
1018 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 1019 | } |
18ee91fa | 1020 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 1021 | |
18ee91fa | 1022 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
1023 | { |
1024 | struct usbnet *dev = netdev_priv(net); | |
1025 | ||
18ee91fa DB |
1026 | return dev->msg_enable; |
1027 | } | |
1028 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 1029 | |
18ee91fa DB |
1030 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
1031 | { | |
1032 | struct usbnet *dev = netdev_priv(net); | |
1033 | ||
1034 | dev->msg_enable = level; | |
c41286fd | 1035 | } |
18ee91fa | 1036 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 1037 | |
2e55cc72 | 1038 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 1039 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
1040 | .get_settings = usbnet_get_settings, |
1041 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 1042 | .get_link = usbnet_get_link, |
c41286fd | 1043 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 1044 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
1045 | .get_msglevel = usbnet_get_msglevel, |
1046 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 1047 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 1048 | }; |
1da177e4 LT |
1049 | |
1050 | /*-------------------------------------------------------------------------*/ | |
1051 | ||
4b49f58f ML |
1052 | static void __handle_link_change(struct usbnet *dev) |
1053 | { | |
1054 | if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1055 | return; | |
1056 | ||
1057 | if (!netif_carrier_ok(dev->net)) { | |
1058 | /* kill URBs for reading packets to save bus bandwidth */ | |
1059 | unlink_urbs(dev, &dev->rxq); | |
1060 | ||
1061 | /* | |
1062 | * tx_timeout will unlink URBs for sending packets and | |
1063 | * tx queue is stopped by netcore after link becomes off | |
1064 | */ | |
1065 | } else { | |
1066 | /* submitting URBs for reading packets */ | |
1067 | tasklet_schedule(&dev->bh); | |
1068 | } | |
1069 | ||
a88c32ae ML |
1070 | /* hard_mtu or rx_urb_size may change during link change */ |
1071 | usbnet_update_max_qlen(dev); | |
1072 | ||
4b49f58f ML |
1073 | clear_bit(EVENT_LINK_CHANGE, &dev->flags); |
1074 | } | |
1075 | ||
1efed2d0 OB |
1076 | static void usbnet_set_rx_mode(struct net_device *net) |
1077 | { | |
1078 | struct usbnet *dev = netdev_priv(net); | |
1079 | ||
1080 | usbnet_defer_kevent(dev, EVENT_SET_RX_MODE); | |
1081 | } | |
1082 | ||
1083 | static void __handle_set_rx_mode(struct usbnet *dev) | |
1084 | { | |
1085 | if (dev->driver_info->set_rx_mode) | |
1086 | (dev->driver_info->set_rx_mode)(dev); | |
1087 | ||
1088 | clear_bit(EVENT_SET_RX_MODE, &dev->flags); | |
1089 | } | |
1090 | ||
1da177e4 LT |
1091 | /* work that cannot be done in interrupt context uses keventd. |
1092 | * | |
1093 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
1094 | * especially now that control transfers can be queued. | |
1095 | */ | |
1096 | static void | |
11f17ef3 | 1097 | usbnet_deferred_kevent (struct work_struct *work) |
1da177e4 | 1098 | { |
c4028958 DH |
1099 | struct usbnet *dev = |
1100 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
1101 | int status; |
1102 | ||
1103 | /* usb_clear_halt() needs a thread context */ | |
1104 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
1105 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
1106 | status = usb_autopm_get_interface(dev->intf); |
1107 | if (status < 0) | |
1108 | goto fail_pipe; | |
1da177e4 | 1109 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 1110 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1111 | if (status < 0 && |
1112 | status != -EPIPE && | |
1113 | status != -ESHUTDOWN) { | |
1da177e4 | 1114 | if (netif_msg_tx_err (dev)) |
69ee472f | 1115 | fail_pipe: |
60b86755 JP |
1116 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
1117 | status); | |
1da177e4 LT |
1118 | } else { |
1119 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
1120 | if (status != -ESHUTDOWN) |
1121 | netif_wake_queue (dev->net); | |
1da177e4 LT |
1122 | } |
1123 | } | |
1124 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1125 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
1126 | status = usb_autopm_get_interface(dev->intf); |
1127 | if (status < 0) | |
1128 | goto fail_halt; | |
1da177e4 | 1129 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 1130 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1131 | if (status < 0 && |
1132 | status != -EPIPE && | |
1133 | status != -ESHUTDOWN) { | |
1da177e4 | 1134 | if (netif_msg_rx_err (dev)) |
69ee472f | 1135 | fail_halt: |
60b86755 JP |
1136 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
1137 | status); | |
1da177e4 LT |
1138 | } else { |
1139 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
1140 | tasklet_schedule (&dev->bh); | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | /* tasklet could resubmit itself forever if memory is tight */ | |
1145 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
1146 | struct urb *urb = NULL; | |
dacb3975 | 1147 | int resched = 1; |
1da177e4 LT |
1148 | |
1149 | if (netif_running (dev->net)) | |
1150 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
1151 | else | |
1152 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
1153 | if (urb != NULL) { | |
1154 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 1155 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
1156 | if (status < 0) { |
1157 | usb_free_urb(urb); | |
69ee472f | 1158 | goto fail_lowmem; |
ab60707f | 1159 | } |
dacb3975 DM |
1160 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
1161 | resched = 0; | |
69ee472f ON |
1162 | usb_autopm_put_interface(dev->intf); |
1163 | fail_lowmem: | |
dacb3975 DM |
1164 | if (resched) |
1165 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
1166 | } |
1167 | } | |
1168 | ||
7ea13c9c | 1169 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 1170 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
1171 | int retval = 0; |
1172 | ||
1173 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1174 | status = usb_autopm_get_interface(dev->intf); |
1175 | if (status < 0) | |
1176 | goto skip_reset; | |
7ea13c9c | 1177 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1178 | usb_autopm_put_interface(dev->intf); |
1179 | skip_reset: | |
60b86755 JP |
1180 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1181 | retval, | |
1182 | dev->udev->bus->bus_name, | |
1183 | dev->udev->devpath, | |
1184 | info->description); | |
69ee472f ON |
1185 | } else { |
1186 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c | 1187 | } |
4b49f58f ML |
1188 | |
1189 | /* handle link change from link resetting */ | |
1190 | __handle_link_change(dev); | |
7ea13c9c DH |
1191 | } |
1192 | ||
4b49f58f ML |
1193 | if (test_bit (EVENT_LINK_CHANGE, &dev->flags)) |
1194 | __handle_link_change(dev); | |
1195 | ||
1efed2d0 OB |
1196 | if (test_bit (EVENT_SET_RX_MODE, &dev->flags)) |
1197 | __handle_set_rx_mode(dev); | |
1198 | ||
1199 | ||
1da177e4 | 1200 | if (dev->flags) |
60b86755 | 1201 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | /*-------------------------------------------------------------------------*/ | |
1205 | ||
7d12e780 | 1206 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1207 | { |
1208 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1209 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1210 | struct usbnet *dev = entry->dev; | |
1211 | ||
1212 | if (urb->status == 0) { | |
1e9e39f4 | 1213 | dev->net->stats.tx_packets += entry->packets; |
7963837f | 1214 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1215 | } else { |
7963837f | 1216 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1217 | |
1218 | switch (urb->status) { | |
1219 | case -EPIPE: | |
2e55cc72 | 1220 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1221 | break; |
1222 | ||
1223 | /* software-driven interface shutdown */ | |
1224 | case -ECONNRESET: // async unlink | |
1225 | case -ESHUTDOWN: // hardware gone | |
1226 | break; | |
1227 | ||
37ebb549 PM |
1228 | /* like rx, tx gets controller i/o faults during hub_wq |
1229 | * delays and so it uses the same throttling mechanism. | |
1230 | */ | |
38e2bfc9 PZ |
1231 | case -EPROTO: |
1232 | case -ETIME: | |
1233 | case -EILSEQ: | |
69ee472f | 1234 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1235 | if (!timer_pending (&dev->delay)) { |
1236 | mod_timer (&dev->delay, | |
1237 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1238 | netif_dbg(dev, link, dev->net, |
1239 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1240 | } |
1241 | netif_stop_queue (dev->net); | |
1242 | break; | |
1243 | default: | |
a475f603 JP |
1244 | netif_dbg(dev, tx_err, dev->net, |
1245 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1246 | break; |
1247 | } | |
1248 | } | |
1249 | ||
69ee472f | 1250 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1251 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | /*-------------------------------------------------------------------------*/ | |
1255 | ||
777baa47 | 1256 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1257 | { |
1258 | struct usbnet *dev = netdev_priv(net); | |
1259 | ||
1260 | unlink_urbs (dev, &dev->txq); | |
1261 | tasklet_schedule (&dev->bh); | |
dbcdd4d5 ON |
1262 | /* this needs to be handled individually because the generic layer |
1263 | * doesn't know what is sufficient and could not restore private | |
1264 | * information if a remedy of an unconditional reset were used. | |
1265 | */ | |
1266 | if (dev->driver_info->recover) | |
1267 | (dev->driver_info->recover)(dev); | |
1da177e4 | 1268 | } |
777baa47 | 1269 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1270 | |
1271 | /*-------------------------------------------------------------------------*/ | |
1272 | ||
638c5115 ML |
1273 | static int build_dma_sg(const struct sk_buff *skb, struct urb *urb) |
1274 | { | |
1275 | unsigned num_sgs, total_len = 0; | |
1276 | int i, s = 0; | |
1277 | ||
1278 | num_sgs = skb_shinfo(skb)->nr_frags + 1; | |
1279 | if (num_sgs == 1) | |
1280 | return 0; | |
1281 | ||
60e453a9 ML |
1282 | /* reserve one for zero packet */ |
1283 | urb->sg = kmalloc((num_sgs + 1) * sizeof(struct scatterlist), | |
1284 | GFP_ATOMIC); | |
638c5115 ML |
1285 | if (!urb->sg) |
1286 | return -ENOMEM; | |
1287 | ||
1288 | urb->num_sgs = num_sgs; | |
fdc3452c | 1289 | sg_init_table(urb->sg, urb->num_sgs + 1); |
638c5115 ML |
1290 | |
1291 | sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb)); | |
1292 | total_len += skb_headlen(skb); | |
1293 | ||
1294 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1295 | struct skb_frag_struct *f = &skb_shinfo(skb)->frags[i]; | |
1296 | ||
1297 | total_len += skb_frag_size(f); | |
1298 | sg_set_page(&urb->sg[i + s], f->page.p, f->size, | |
1299 | f->page_offset); | |
1300 | } | |
1301 | urb->transfer_buffer_length = total_len; | |
1302 | ||
1303 | return 1; | |
1304 | } | |
1305 | ||
25a79c41 SH |
1306 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1307 | struct net_device *net) | |
1da177e4 LT |
1308 | { |
1309 | struct usbnet *dev = netdev_priv(net); | |
3e4336a6 | 1310 | unsigned int length; |
1da177e4 LT |
1311 | struct urb *urb = NULL; |
1312 | struct skb_data *entry; | |
1313 | struct driver_info *info = dev->driver_info; | |
1314 | unsigned long flags; | |
25a79c41 | 1315 | int retval; |
1da177e4 | 1316 | |
23ba0799 KK |
1317 | if (skb) |
1318 | skb_tx_timestamp(skb); | |
f9b491ec | 1319 | |
1da177e4 LT |
1320 | // some devices want funky USB-level framing, for |
1321 | // win32 driver (usually) and/or hardware quirks | |
1322 | if (info->tx_fixup) { | |
1323 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1324 | if (!skb) { | |
bf414b36 BM |
1325 | /* packet collected; minidriver waiting for more */ |
1326 | if (info->flags & FLAG_MULTI_PACKET) | |
073285fd | 1327 | goto not_drop; |
bf414b36 BM |
1328 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1329 | goto drop; | |
1da177e4 LT |
1330 | } |
1331 | } | |
1da177e4 LT |
1332 | |
1333 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1334 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1335 | goto drop; |
1336 | } | |
1337 | ||
1338 | entry = (struct skb_data *) skb->cb; | |
1339 | entry->urb = urb; | |
1340 | entry->dev = dev; | |
1da177e4 | 1341 | |
1da177e4 LT |
1342 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1343 | skb->data, skb->len, tx_complete, skb); | |
638c5115 ML |
1344 | if (dev->can_dma_sg) { |
1345 | if (build_dma_sg(skb, urb) < 0) | |
1346 | goto drop; | |
1347 | } | |
60e453a9 | 1348 | length = urb->transfer_buffer_length; |
1da177e4 LT |
1349 | |
1350 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1351 | * NOTE: strictly conforming cdc-ether devices should expect | |
1352 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1353 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1354 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1355 | * packet itself if needed. | |
1da177e4 | 1356 | */ |
b4d562e3 EP |
1357 | if (length % dev->maxpacket == 0) { |
1358 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd | 1359 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
60e453a9 ML |
1360 | length++; |
1361 | if (skb_tailroom(skb) && !urb->num_sgs) { | |
073285fd AO |
1362 | skb->data[skb->len] = 0; |
1363 | __skb_put(skb, 1); | |
60e453a9 ML |
1364 | } else if (urb->num_sgs) |
1365 | sg_set_buf(&urb->sg[urb->num_sgs++], | |
1366 | dev->padding_pkt, 1); | |
b4d562e3 EP |
1367 | } |
1368 | } else | |
1369 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1370 | } |
7a1e890e BH |
1371 | urb->transfer_buffer_length = length; |
1372 | ||
1373 | if (info->flags & FLAG_MULTI_PACKET) { | |
1374 | /* Driver has set number of packets and a length delta. | |
1375 | * Calculate the complete length and ensure that it's | |
1376 | * positive. | |
1377 | */ | |
1378 | entry->length += length; | |
1379 | if (WARN_ON_ONCE(entry->length <= 0)) | |
1380 | entry->length = length; | |
1381 | } else { | |
1382 | usbnet_set_skb_tx_stats(skb, 1, length); | |
1383 | } | |
1da177e4 | 1384 | |
69ee472f ON |
1385 | spin_lock_irqsave(&dev->txq.lock, flags); |
1386 | retval = usb_autopm_get_interface_async(dev->intf); | |
1387 | if (retval < 0) { | |
1388 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1389 | goto drop; | |
1390 | } | |
1391 | ||
1392 | #ifdef CONFIG_PM | |
1393 | /* if this triggers the device is still a sleep */ | |
1394 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1395 | /* transmission will be done in resume */ | |
1396 | usb_anchor_urb(urb, &dev->deferred); | |
1397 | /* no use to process more packets */ | |
1398 | netif_stop_queue(net); | |
39707c2a | 1399 | usb_put_urb(urb); |
69ee472f | 1400 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1401 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1402 | goto deferred; |
1403 | } | |
1404 | #endif | |
1da177e4 | 1405 | |
1da177e4 LT |
1406 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1407 | case -EPIPE: | |
1408 | netif_stop_queue (net); | |
2e55cc72 | 1409 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1410 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1411 | break; |
1412 | default: | |
69ee472f | 1413 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1414 | netif_dbg(dev, tx_err, dev->net, |
1415 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1416 | break; |
1417 | case 0: | |
1418 | net->trans_start = jiffies; | |
5b6e9bcd | 1419 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1420 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1421 | netif_stop_queue (net); | |
1422 | } | |
1423 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1424 | ||
1425 | if (retval) { | |
a475f603 | 1426 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1427 | drop: |
7963837f | 1428 | dev->net->stats.tx_dropped++; |
073285fd | 1429 | not_drop: |
1da177e4 LT |
1430 | if (skb) |
1431 | dev_kfree_skb_any (skb); | |
638c5115 ML |
1432 | if (urb) { |
1433 | kfree(urb->sg); | |
1434 | usb_free_urb(urb); | |
1435 | } | |
a475f603 JP |
1436 | } else |
1437 | netif_dbg(dev, tx_queued, dev->net, | |
3e4336a6 | 1438 | "> tx, len %u, type 0x%x\n", length, skb->protocol); |
69ee472f ON |
1439 | #ifdef CONFIG_PM |
1440 | deferred: | |
1441 | #endif | |
25a79c41 | 1442 | return NETDEV_TX_OK; |
1da177e4 | 1443 | } |
777baa47 | 1444 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1445 | |
85e87870 | 1446 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1447 | { |
1448 | struct urb *urb; | |
1449 | int i; | |
85e87870 | 1450 | int ret = 0; |
65841fd5 ML |
1451 | |
1452 | /* don't refill the queue all at once */ | |
1453 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1454 | urb = usb_alloc_urb(0, flags); | |
1455 | if (urb != NULL) { | |
85e87870 BM |
1456 | ret = rx_submit(dev, urb, flags); |
1457 | if (ret) | |
1458 | goto err; | |
1459 | } else { | |
1460 | ret = -ENOMEM; | |
1461 | goto err; | |
65841fd5 ML |
1462 | } |
1463 | } | |
85e87870 BM |
1464 | err: |
1465 | return ret; | |
65841fd5 ML |
1466 | } |
1467 | ||
1da177e4 LT |
1468 | /*-------------------------------------------------------------------------*/ |
1469 | ||
1470 | // tasklet (work deferred from completions, in_irq) or timer | |
1471 | ||
1472 | static void usbnet_bh (unsigned long param) | |
1473 | { | |
1474 | struct usbnet *dev = (struct usbnet *) param; | |
1475 | struct sk_buff *skb; | |
1476 | struct skb_data *entry; | |
1477 | ||
1478 | while ((skb = skb_dequeue (&dev->done))) { | |
1479 | entry = (struct skb_data *) skb->cb; | |
1480 | switch (entry->state) { | |
18ab458f | 1481 | case rx_done: |
1da177e4 LT |
1482 | entry->state = rx_cleanup; |
1483 | rx_process (dev, skb); | |
1484 | continue; | |
18ab458f | 1485 | case tx_done: |
638c5115 | 1486 | kfree(entry->urb->sg); |
18ab458f | 1487 | case rx_cleanup: |
1da177e4 LT |
1488 | usb_free_urb (entry->urb); |
1489 | dev_kfree_skb (skb); | |
1490 | continue; | |
18ab458f | 1491 | default: |
60b86755 | 1492 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1493 | } |
1494 | } | |
1495 | ||
70c37bf9 BM |
1496 | /* restart RX again after disabling due to high error rate */ |
1497 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
1498 | ||
14a0d635 ON |
1499 | /* waiting for all pending urbs to complete? |
1500 | * only then can we forgo submitting anew | |
1501 | */ | |
1502 | if (waitqueue_active(&dev->wait)) { | |
1503 | if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0) | |
1504 | wake_up_all(&dev->wait); | |
1da177e4 LT |
1505 | |
1506 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1507 | } else if (netif_running (dev->net) && |
1508 | netif_device_present (dev->net) && | |
4b49f58f | 1509 | netif_carrier_ok(dev->net) && |
8e95a202 JP |
1510 | !timer_pending (&dev->delay) && |
1511 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1512 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1513 | |
1514 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1515 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1516 | return; | |
a475f603 JP |
1517 | if (temp != dev->rxq.qlen) |
1518 | netif_dbg(dev, link, dev->net, | |
1519 | "rxqlen %d --> %d\n", | |
1520 | temp, dev->rxq.qlen); | |
65841fd5 | 1521 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1522 | tasklet_schedule (&dev->bh); |
1523 | } | |
1524 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1525 | netif_wake_queue (dev->net); | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | ||
1da177e4 LT |
1530 | /*------------------------------------------------------------------------- |
1531 | * | |
1532 | * USB Device Driver support | |
1533 | * | |
1534 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1535 | |
1da177e4 LT |
1536 | // precondition: never called in_interrupt |
1537 | ||
38bde1d4 | 1538 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1539 | { |
1540 | struct usbnet *dev; | |
1541 | struct usb_device *xdev; | |
1542 | struct net_device *net; | |
1543 | ||
1544 | dev = usb_get_intfdata(intf); | |
1545 | usb_set_intfdata(intf, NULL); | |
1546 | if (!dev) | |
1547 | return; | |
1548 | ||
1549 | xdev = interface_to_usbdev (intf); | |
1550 | ||
a475f603 JP |
1551 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1552 | intf->dev.driver->name, | |
1553 | xdev->bus->bus_name, xdev->devpath, | |
1554 | dev->driver_info->description); | |
cb1cebbe | 1555 | |
1da177e4 LT |
1556 | net = dev->net; |
1557 | unregister_netdev (net); | |
1558 | ||
23f333a2 | 1559 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1560 | |
39707c2a HK |
1561 | usb_scuttle_anchored_urbs(&dev->deferred); |
1562 | ||
1da177e4 LT |
1563 | if (dev->driver_info->unbind) |
1564 | dev->driver_info->unbind (dev, intf); | |
1565 | ||
68972efa PS |
1566 | usb_kill_urb(dev->interrupt); |
1567 | usb_free_urb(dev->interrupt); | |
60e453a9 | 1568 | kfree(dev->padding_pkt); |
68972efa | 1569 | |
1da177e4 | 1570 | free_netdev(net); |
1da177e4 | 1571 | } |
38bde1d4 | 1572 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1573 | |
777baa47 SH |
1574 | static const struct net_device_ops usbnet_netdev_ops = { |
1575 | .ndo_open = usbnet_open, | |
1576 | .ndo_stop = usbnet_stop, | |
1577 | .ndo_start_xmit = usbnet_start_xmit, | |
1578 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1efed2d0 | 1579 | .ndo_set_rx_mode = usbnet_set_rx_mode, |
777baa47 SH |
1580 | .ndo_change_mtu = usbnet_change_mtu, |
1581 | .ndo_set_mac_address = eth_mac_addr, | |
1582 | .ndo_validate_addr = eth_validate_addr, | |
1583 | }; | |
1da177e4 LT |
1584 | |
1585 | /*-------------------------------------------------------------------------*/ | |
1586 | ||
1da177e4 LT |
1587 | // precondition: never called in_interrupt |
1588 | ||
225794f8 MH |
1589 | static struct device_type wlan_type = { |
1590 | .name = "wlan", | |
1591 | }; | |
1592 | ||
1593 | static struct device_type wwan_type = { | |
1594 | .name = "wwan", | |
1595 | }; | |
1596 | ||
38bde1d4 | 1597 | int |
1da177e4 LT |
1598 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1599 | { | |
1600 | struct usbnet *dev; | |
cb1cebbe | 1601 | struct net_device *net; |
1da177e4 LT |
1602 | struct usb_host_interface *interface; |
1603 | struct driver_info *info; | |
1604 | struct usb_device *xdev; | |
1605 | int status; | |
296c0242 | 1606 | const char *name; |
b0786b43 ML |
1607 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1608 | ||
1609 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1610 | * for usb interface, otherwise usb_autopm_get_interface may return | |
98f541c6 | 1611 | * failure if RUNTIME_PM is enabled. |
b0786b43 ML |
1612 | */ |
1613 | if (!driver->supports_autosuspend) { | |
1614 | driver->supports_autosuspend = 1; | |
1615 | pm_runtime_enable(&udev->dev); | |
1616 | } | |
1da177e4 | 1617 | |
296c0242 | 1618 | name = udev->dev.driver->name; |
1da177e4 LT |
1619 | info = (struct driver_info *) prod->driver_info; |
1620 | if (!info) { | |
296c0242 | 1621 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1622 | return -ENODEV; |
1623 | } | |
1624 | xdev = interface_to_usbdev (udev); | |
1625 | interface = udev->cur_altsetting; | |
1626 | ||
1da177e4 LT |
1627 | status = -ENOMEM; |
1628 | ||
1629 | // set up our own records | |
1630 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1631 | if (!net) |
1da177e4 | 1632 | goto out; |
1da177e4 | 1633 | |
0dacca73 BH |
1634 | /* netdev_printk() needs this so do it as early as possible */ |
1635 | SET_NETDEV_DEV(net, &udev->dev); | |
1636 | ||
1da177e4 LT |
1637 | dev = netdev_priv(net); |
1638 | dev->udev = xdev; | |
a11a6544 | 1639 | dev->intf = udev; |
1da177e4 | 1640 | dev->driver_info = info; |
296c0242 | 1641 | dev->driver_name = name; |
1da177e4 LT |
1642 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1643 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
14a0d635 | 1644 | init_waitqueue_head(&dev->wait); |
1da177e4 LT |
1645 | skb_queue_head_init (&dev->rxq); |
1646 | skb_queue_head_init (&dev->txq); | |
1647 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1648 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1649 | dev->bh.func = usbnet_bh; |
1650 | dev->bh.data = (unsigned long) dev; | |
11f17ef3 | 1651 | INIT_WORK (&dev->kevent, usbnet_deferred_kevent); |
69ee472f | 1652 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1653 | dev->delay.function = usbnet_bh; |
1654 | dev->delay.data = (unsigned long) dev; | |
1655 | init_timer (&dev->delay); | |
a9fc6338 | 1656 | mutex_init (&dev->phy_mutex); |
6eecdc5f DW |
1657 | mutex_init(&dev->interrupt_mutex); |
1658 | dev->interrupt_count = 0; | |
1da177e4 | 1659 | |
1da177e4 LT |
1660 | dev->net = net; |
1661 | strcpy (net->name, "usb%d"); | |
1662 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1663 | ||
2e55cc72 DB |
1664 | /* rx and tx sides can use different message sizes; |
1665 | * bind() should set rx_urb_size in that case. | |
1666 | */ | |
1667 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 | 1668 | |
777baa47 | 1669 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1670 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1671 | net->ethtool_ops = &usbnet_ethtool_ops; |
1672 | ||
1673 | // allow device-specific bind/init procedures | |
1674 | // NOTE net->name still not usable ... | |
1675 | if (info->bind) { | |
1676 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1677 | if (status < 0) |
1678 | goto out1; | |
1679 | ||
1da177e4 LT |
1680 | // heuristic: "usb%d" for links we know are two-host, |
1681 | // else "eth%d" when there's reasonable doubt. userspace | |
1682 | // can rename the link if it knows better. | |
8e95a202 | 1683 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1684 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1685 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1686 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1687 | /* WLAN devices should always be named "wlan%d" */ |
1688 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1689 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1690 | /* WWAN devices should always be named "wwan%d" */ |
1691 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1692 | strcpy(net->name, "wwan%d"); | |
f29fc259 | 1693 | |
6509141f WS |
1694 | /* devices that cannot do ARP */ |
1695 | if ((dev->driver_info->flags & FLAG_NOARP) != 0) | |
1696 | net->flags |= IFF_NOARP; | |
1697 | ||
f29fc259 DB |
1698 | /* maybe the remote can't receive an Ethernet MTU */ |
1699 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1700 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1701 | } else if (!info->in || !info->out) |
1702 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1703 | else { |
1704 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1705 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1706 | if (!(info->flags & FLAG_NO_SETINT)) | |
1707 | status = usb_set_interface (xdev, | |
1708 | interface->desc.bInterfaceNumber, | |
1709 | interface->desc.bAlternateSetting); | |
1710 | else | |
1711 | status = 0; | |
1712 | ||
1713 | } | |
9514bfe5 | 1714 | if (status >= 0 && dev->status) |
1da177e4 LT |
1715 | status = init_status (dev, udev); |
1716 | if (status < 0) | |
cb1cebbe | 1717 | goto out3; |
1da177e4 | 1718 | |
2e55cc72 DB |
1719 | if (!dev->rx_urb_size) |
1720 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1721 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1722 | |
eef23b53 BM |
1723 | /* let userspace know we have a random address */ |
1724 | if (ether_addr_equal(net->dev_addr, node_id)) | |
1725 | net->addr_assign_type = NET_ADDR_RANDOM; | |
1726 | ||
225794f8 MH |
1727 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1728 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1729 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1730 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1731 | ||
a88c32ae ML |
1732 | /* initialize max rx_qlen and tx_qlen */ |
1733 | usbnet_update_max_qlen(dev); | |
1734 | ||
60e453a9 ML |
1735 | if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) && |
1736 | !(info->flags & FLAG_MULTI_PACKET)) { | |
1737 | dev->padding_pkt = kzalloc(1, GFP_KERNEL); | |
09b69024 WY |
1738 | if (!dev->padding_pkt) { |
1739 | status = -ENOMEM; | |
60e453a9 | 1740 | goto out4; |
09b69024 | 1741 | } |
60e453a9 ML |
1742 | } |
1743 | ||
1da177e4 LT |
1744 | status = register_netdev (net); |
1745 | if (status) | |
60e453a9 | 1746 | goto out5; |
a475f603 JP |
1747 | netif_info(dev, probe, dev->net, |
1748 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1749 | udev->dev.driver->name, | |
1750 | xdev->bus->bus_name, xdev->devpath, | |
1751 | dev->driver_info->description, | |
1752 | net->dev_addr); | |
1da177e4 LT |
1753 | |
1754 | // ok, it's ready to go. | |
1755 | usb_set_intfdata (udev, dev); | |
1756 | ||
1da177e4 LT |
1757 | netif_device_attach (net); |
1758 | ||
37e8273c | 1759 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
0162c554 | 1760 | usbnet_link_change(dev, 0, 0); |
37e8273c | 1761 | |
1da177e4 LT |
1762 | return 0; |
1763 | ||
60e453a9 ML |
1764 | out5: |
1765 | kfree(dev->padding_pkt); | |
a4723848 | 1766 | out4: |
1767 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1768 | out3: |
1769 | if (info->unbind) | |
1770 | info->unbind (dev, udev); | |
1771 | out1: | |
1666984c ON |
1772 | /* subdrivers must undo all they did in bind() if they |
1773 | * fail it, but we may fail later and a deferred kevent | |
1774 | * may trigger an error resubmitting itself and, worse, | |
1775 | * schedule a timer. So we kill it all just in case. | |
1776 | */ | |
1777 | cancel_work_sync(&dev->kevent); | |
1778 | del_timer_sync(&dev->delay); | |
1da177e4 LT |
1779 | free_netdev(net); |
1780 | out: | |
1da177e4 LT |
1781 | return status; |
1782 | } | |
38bde1d4 | 1783 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1784 | |
1785 | /*-------------------------------------------------------------------------*/ | |
1786 | ||
36433127 ON |
1787 | /* |
1788 | * suspend the whole driver as soon as the first interface is suspended | |
1789 | * resume only when the last interface is resumed | |
38bde1d4 | 1790 | */ |
1da177e4 | 1791 | |
38bde1d4 | 1792 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1793 | { |
1794 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1795 | |
36433127 | 1796 | if (!dev->suspend_count++) { |
69ee472f ON |
1797 | spin_lock_irq(&dev->txq.lock); |
1798 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1799 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1800 | dev->suspend_count--; |
69ee472f ON |
1801 | spin_unlock_irq(&dev->txq.lock); |
1802 | return -EBUSY; | |
1803 | } else { | |
1804 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1805 | spin_unlock_irq(&dev->txq.lock); | |
1806 | } | |
a11a6544 ON |
1807 | /* |
1808 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1809 | * having everything error out. |
1810 | */ | |
1811 | netif_device_detach (dev->net); | |
69ee472f | 1812 | usbnet_terminate_urbs(dev); |
6eecdc5f | 1813 | __usbnet_status_stop_force(dev); |
69ee472f | 1814 | |
a11a6544 ON |
1815 | /* |
1816 | * reattach so runtime management can use and | |
1817 | * wake the device | |
1818 | */ | |
1819 | netif_device_attach (dev->net); | |
36433127 | 1820 | } |
1da177e4 LT |
1821 | return 0; |
1822 | } | |
38bde1d4 | 1823 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1824 | |
38bde1d4 | 1825 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1826 | { |
1827 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1828 | struct sk_buff *skb; |
1829 | struct urb *res; | |
1830 | int retval; | |
1831 | ||
1832 | if (!--dev->suspend_count) { | |
6eecdc5f DW |
1833 | /* resume interrupt URB if it was previously submitted */ |
1834 | __usbnet_status_start_force(dev, GFP_NOIO); | |
68972efa | 1835 | |
69ee472f ON |
1836 | spin_lock_irq(&dev->txq.lock); |
1837 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1838 | ||
69ee472f ON |
1839 | skb = (struct sk_buff *)res->context; |
1840 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1841 | if (retval < 0) { | |
1842 | dev_kfree_skb_any(skb); | |
638c5115 | 1843 | kfree(res->sg); |
69ee472f ON |
1844 | usb_free_urb(res); |
1845 | usb_autopm_put_interface_async(dev->intf); | |
1846 | } else { | |
1847 | dev->net->trans_start = jiffies; | |
1848 | __skb_queue_tail(&dev->txq, skb); | |
1849 | } | |
1850 | } | |
1da177e4 | 1851 | |
69ee472f ON |
1852 | smp_mb(); |
1853 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1854 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1855 | |
1856 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
14a0d635 ON |
1857 | /* handle remote wakeup ASAP |
1858 | * we cannot race against stop | |
1859 | */ | |
1860 | if (netif_device_present(dev->net) && | |
65841fd5 ML |
1861 | !timer_pending(&dev->delay) && |
1862 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1863 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1864 | |
75bd0cbd | 1865 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1866 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1867 | tasklet_schedule (&dev->bh); |
1868 | } | |
69ee472f | 1869 | } |
5d9d01a3 ON |
1870 | |
1871 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1872 | usb_autopm_get_interface_no_resume(intf); | |
1873 | ||
1da177e4 LT |
1874 | return 0; |
1875 | } | |
38bde1d4 | 1876 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1877 | |
5d9d01a3 ON |
1878 | /* |
1879 | * Either a subdriver implements manage_power, then it is assumed to always | |
1880 | * be ready to be suspended or it reports the readiness to be suspended | |
1881 | * explicitly | |
1882 | */ | |
1883 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1884 | { | |
1885 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1886 | dev->intf->needs_remote_wakeup = 1; | |
1887 | usb_autopm_put_interface_async(dev->intf); | |
1888 | } | |
1889 | } | |
1890 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1891 | |
2dd7c8cf ON |
1892 | /* |
1893 | * For devices that can do without special commands | |
1894 | */ | |
1895 | int usbnet_manage_power(struct usbnet *dev, int on) | |
1896 | { | |
1897 | dev->intf->needs_remote_wakeup = on; | |
1898 | return 0; | |
1899 | } | |
1900 | EXPORT_SYMBOL(usbnet_manage_power); | |
1901 | ||
ac64995d ML |
1902 | void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset) |
1903 | { | |
1904 | /* update link after link is reseted */ | |
1905 | if (link && !need_reset) | |
1906 | netif_carrier_on(dev->net); | |
1907 | else | |
1908 | netif_carrier_off(dev->net); | |
1909 | ||
1910 | if (need_reset && link) | |
1911 | usbnet_defer_kevent(dev, EVENT_LINK_RESET); | |
4b49f58f ML |
1912 | else |
1913 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); | |
ac64995d ML |
1914 | } |
1915 | EXPORT_SYMBOL(usbnet_link_change); | |
1916 | ||
877bd862 | 1917 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1918 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1919 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1920 | { |
1921 | void *buf = NULL; | |
1922 | int err = -ENOMEM; | |
1923 | ||
1924 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1925 | " value=0x%04x index=0x%04x size=%d\n", | |
1926 | cmd, reqtype, value, index, size); | |
1927 | ||
1928 | if (data) { | |
1929 | buf = kmalloc(size, GFP_KERNEL); | |
1930 | if (!buf) | |
1931 | goto out; | |
1932 | } | |
1933 | ||
1934 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1935 | cmd, reqtype, value, index, buf, size, | |
1936 | USB_CTRL_GET_TIMEOUT); | |
1937 | if (err > 0 && err <= size) | |
1938 | memcpy(data, buf, err); | |
1939 | kfree(buf); | |
1940 | out: | |
1941 | return err; | |
1942 | } | |
877bd862 | 1943 | |
0547fad2 ML |
1944 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1945 | u16 value, u16 index, const void *data, | |
1946 | u16 size) | |
877bd862 ML |
1947 | { |
1948 | void *buf = NULL; | |
1949 | int err = -ENOMEM; | |
1950 | ||
1951 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1952 | " value=0x%04x index=0x%04x size=%d\n", | |
1953 | cmd, reqtype, value, index, size); | |
1954 | ||
1955 | if (data) { | |
1956 | buf = kmemdup(data, size, GFP_KERNEL); | |
1957 | if (!buf) | |
1958 | goto out; | |
1959 | } | |
1960 | ||
1961 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1962 | cmd, reqtype, value, index, buf, size, | |
1963 | USB_CTRL_SET_TIMEOUT); | |
1964 | kfree(buf); | |
1965 | ||
1966 | out: | |
1967 | return err; | |
1968 | } | |
0547fad2 | 1969 | |
c40a2c88 ON |
1970 | int cdc_parse_cdc_header(struct usb_cdc_parsed_header *hdr, |
1971 | struct usb_interface *intf, | |
1972 | u8 *buffer, | |
1973 | int buflen) | |
1974 | { | |
1975 | /* duplicates are ignored */ | |
1976 | struct usb_cdc_union_desc *union_header = NULL; | |
1977 | ||
1978 | /* duplicates are not tolerated */ | |
1979 | struct usb_cdc_header_desc *header = NULL; | |
1980 | struct usb_cdc_ether_desc *ether = NULL; | |
1981 | struct usb_cdc_mdlm_detail_desc *detail = NULL; | |
1982 | struct usb_cdc_mdlm_desc *desc = NULL; | |
1983 | ||
1984 | unsigned int elength; | |
1985 | int cnt = 0; | |
1986 | ||
1987 | memset(hdr, 0x00, sizeof(struct usb_cdc_parsed_header)); | |
1988 | hdr->phonet_magic_present = false; | |
1989 | while (buflen > 0) { | |
1990 | elength = buffer[0]; | |
1991 | if (!elength) { | |
1992 | dev_err(&intf->dev, "skipping garbage byte\n"); | |
1993 | elength = 1; | |
1994 | goto next_desc; | |
1995 | } | |
1996 | if (buffer[1] != USB_DT_CS_INTERFACE) { | |
1997 | dev_err(&intf->dev, "skipping garbage\n"); | |
1998 | goto next_desc; | |
1999 | } | |
2000 | ||
2001 | switch (buffer[2]) { | |
2002 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
2003 | if (elength < sizeof(struct usb_cdc_union_desc)) | |
2004 | goto next_desc; | |
2005 | if (union_header) { | |
2006 | dev_err(&intf->dev, "More than one union descriptor, skipping ...\n"); | |
2007 | goto next_desc; | |
2008 | } | |
2009 | union_header = (struct usb_cdc_union_desc *)buffer; | |
2010 | break; | |
2011 | case USB_CDC_COUNTRY_TYPE: | |
2012 | if (elength < sizeof(struct usb_cdc_country_functional_desc)) | |
2013 | goto next_desc; | |
2014 | hdr->usb_cdc_country_functional_desc = | |
2015 | (struct usb_cdc_country_functional_desc *)buffer; | |
2016 | break; | |
2017 | case USB_CDC_HEADER_TYPE: | |
2018 | if (elength != sizeof(struct usb_cdc_header_desc)) | |
2019 | goto next_desc; | |
2020 | if (header) | |
2021 | return -EINVAL; | |
2022 | header = (struct usb_cdc_header_desc *)buffer; | |
2023 | break; | |
2024 | case USB_CDC_ACM_TYPE: | |
2025 | if (elength < sizeof(struct usb_cdc_acm_descriptor)) | |
2026 | goto next_desc; | |
2027 | hdr->usb_cdc_acm_descriptor = | |
2028 | (struct usb_cdc_acm_descriptor *)buffer; | |
2029 | break; | |
2030 | case USB_CDC_ETHERNET_TYPE: | |
2031 | if (elength != sizeof(struct usb_cdc_ether_desc)) | |
2032 | goto next_desc; | |
2033 | if (ether) | |
2034 | return -EINVAL; | |
2035 | ether = (struct usb_cdc_ether_desc *)buffer; | |
2036 | break; | |
2037 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
2038 | if (elength < sizeof(struct usb_cdc_call_mgmt_descriptor)) | |
2039 | goto next_desc; | |
2040 | hdr->usb_cdc_call_mgmt_descriptor = | |
2041 | (struct usb_cdc_call_mgmt_descriptor *)buffer; | |
2042 | break; | |
2043 | case USB_CDC_DMM_TYPE: | |
2044 | if (elength < sizeof(struct usb_cdc_dmm_desc)) | |
2045 | goto next_desc; | |
2046 | hdr->usb_cdc_dmm_desc = | |
2047 | (struct usb_cdc_dmm_desc *)buffer; | |
2048 | break; | |
2049 | case USB_CDC_MDLM_TYPE: | |
2050 | if (elength < sizeof(struct usb_cdc_mdlm_desc *)) | |
2051 | goto next_desc; | |
2052 | if (desc) | |
2053 | return -EINVAL; | |
2054 | desc = (struct usb_cdc_mdlm_desc *)buffer; | |
2055 | break; | |
2056 | case USB_CDC_MDLM_DETAIL_TYPE: | |
2057 | if (elength < sizeof(struct usb_cdc_mdlm_detail_desc *)) | |
2058 | goto next_desc; | |
2059 | if (detail) | |
2060 | return -EINVAL; | |
2061 | detail = (struct usb_cdc_mdlm_detail_desc *)buffer; | |
2062 | break; | |
2063 | case USB_CDC_NCM_TYPE: | |
2064 | if (elength < sizeof(struct usb_cdc_ncm_desc)) | |
2065 | goto next_desc; | |
2066 | hdr->usb_cdc_ncm_desc = (struct usb_cdc_ncm_desc *)buffer; | |
2067 | break; | |
2068 | case USB_CDC_MBIM_TYPE: | |
2069 | if (elength < sizeof(struct usb_cdc_mbim_desc)) | |
2070 | goto next_desc; | |
2071 | ||
2072 | hdr->usb_cdc_mbim_desc = (struct usb_cdc_mbim_desc *)buffer; | |
2073 | break; | |
2074 | case USB_CDC_MBIM_EXTENDED_TYPE: | |
2075 | if (elength < sizeof(struct usb_cdc_mbim_extended_desc)) | |
2076 | break; | |
2077 | hdr->usb_cdc_mbim_extended_desc = | |
2078 | (struct usb_cdc_mbim_extended_desc *)buffer; | |
2079 | break; | |
2080 | case CDC_PHONET_MAGIC_NUMBER: | |
2081 | hdr->phonet_magic_present = true; | |
2082 | break; | |
2083 | default: | |
2084 | /* | |
2085 | * there are LOTS more CDC descriptors that | |
2086 | * could legitimately be found here. | |
2087 | */ | |
2088 | dev_dbg(&intf->dev, "Ignoring descriptor: type %02x, length %ud\n", | |
2089 | buffer[2], elength); | |
2090 | goto next_desc; | |
2091 | } | |
2092 | cnt++; | |
2093 | next_desc: | |
2094 | buflen -= elength; | |
2095 | buffer += elength; | |
2096 | } | |
2097 | hdr->usb_cdc_union_desc = union_header; | |
2098 | hdr->usb_cdc_header_desc = header; | |
2099 | hdr->usb_cdc_mdlm_detail_desc = detail; | |
2100 | hdr->usb_cdc_mdlm_desc = desc; | |
2101 | hdr->usb_cdc_ether_desc = ether; | |
2102 | return cnt; | |
2103 | } | |
2104 | ||
2105 | EXPORT_SYMBOL(cdc_parse_cdc_header); | |
2106 | ||
0547fad2 ML |
2107 | /* |
2108 | * The function can't be called inside suspend/resume callback, | |
2109 | * otherwise deadlock will be caused. | |
2110 | */ | |
2111 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2112 | u16 value, u16 index, void *data, u16 size) | |
2113 | { | |
6f0a0986 ML |
2114 | int ret; |
2115 | ||
2116 | if (usb_autopm_get_interface(dev->intf) < 0) | |
2117 | return -ENODEV; | |
2118 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
2119 | data, size); | |
2120 | usb_autopm_put_interface(dev->intf); | |
2121 | return ret; | |
0547fad2 ML |
2122 | } |
2123 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
2124 | ||
2125 | /* | |
2126 | * The function can't be called inside suspend/resume callback, | |
2127 | * otherwise deadlock will be caused. | |
2128 | */ | |
2129 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2130 | u16 value, u16 index, const void *data, u16 size) | |
2131 | { | |
6f0a0986 ML |
2132 | int ret; |
2133 | ||
2134 | if (usb_autopm_get_interface(dev->intf) < 0) | |
2135 | return -ENODEV; | |
2136 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
2137 | data, size); | |
2138 | usb_autopm_put_interface(dev->intf); | |
2139 | return ret; | |
0547fad2 | 2140 | } |
877bd862 ML |
2141 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
2142 | ||
0547fad2 ML |
2143 | /* |
2144 | * The function can be called inside suspend/resume callback safely | |
2145 | * and should only be called by suspend/resume callback generally. | |
2146 | */ | |
2147 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2148 | u16 value, u16 index, void *data, u16 size) | |
2149 | { | |
2150 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
2151 | data, size); | |
2152 | } | |
2153 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
2154 | ||
2155 | /* | |
2156 | * The function can be called inside suspend/resume callback safely | |
2157 | * and should only be called by suspend/resume callback generally. | |
2158 | */ | |
2159 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2160 | u16 value, u16 index, const void *data, | |
2161 | u16 size) | |
2162 | { | |
2163 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
2164 | data, size); | |
2165 | } | |
2166 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
2167 | ||
877bd862 ML |
2168 | static void usbnet_async_cmd_cb(struct urb *urb) |
2169 | { | |
2170 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
2171 | int status = urb->status; | |
2172 | ||
2173 | if (status < 0) | |
2174 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
2175 | __func__, status); | |
2176 | ||
2177 | kfree(req); | |
2178 | usb_free_urb(urb); | |
2179 | } | |
2180 | ||
0547fad2 ML |
2181 | /* |
2182 | * The caller must make sure that device can't be put into suspend | |
2183 | * state until the control URB completes. | |
2184 | */ | |
877bd862 ML |
2185 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
2186 | u16 value, u16 index, const void *data, u16 size) | |
2187 | { | |
2188 | struct usb_ctrlrequest *req = NULL; | |
2189 | struct urb *urb; | |
2190 | int err = -ENOMEM; | |
2191 | void *buf = NULL; | |
2192 | ||
2193 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
2194 | " value=0x%04x index=0x%04x size=%d\n", | |
2195 | cmd, reqtype, value, index, size); | |
2196 | ||
2197 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
2198 | if (!urb) { | |
2199 | netdev_err(dev->net, "Error allocating URB in" | |
2200 | " %s!\n", __func__); | |
2201 | goto fail; | |
2202 | } | |
2203 | ||
2204 | if (data) { | |
2205 | buf = kmemdup(data, size, GFP_ATOMIC); | |
2206 | if (!buf) { | |
2207 | netdev_err(dev->net, "Error allocating buffer" | |
2208 | " in %s!\n", __func__); | |
2209 | goto fail_free; | |
2210 | } | |
2211 | } | |
2212 | ||
2213 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
38673c82 | 2214 | if (!req) |
877bd862 | 2215 | goto fail_free_buf; |
877bd862 ML |
2216 | |
2217 | req->bRequestType = reqtype; | |
2218 | req->bRequest = cmd; | |
2219 | req->wValue = cpu_to_le16(value); | |
2220 | req->wIndex = cpu_to_le16(index); | |
2221 | req->wLength = cpu_to_le16(size); | |
2222 | ||
2223 | usb_fill_control_urb(urb, dev->udev, | |
2224 | usb_sndctrlpipe(dev->udev, 0), | |
2225 | (void *)req, buf, size, | |
2226 | usbnet_async_cmd_cb, req); | |
2227 | urb->transfer_flags |= URB_FREE_BUFFER; | |
2228 | ||
2229 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
2230 | if (err < 0) { | |
2231 | netdev_err(dev->net, "Error submitting the control" | |
2232 | " message: status=%d\n", err); | |
2233 | goto fail_free; | |
2234 | } | |
2235 | return 0; | |
2236 | ||
2237 | fail_free_buf: | |
2238 | kfree(buf); | |
2239 | fail_free: | |
2240 | kfree(req); | |
2241 | usb_free_urb(urb); | |
2242 | fail: | |
2243 | return err; | |
2244 | ||
2245 | } | |
2246 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
2247 | /*-------------------------------------------------------------------------*/ |
2248 | ||
f29fc259 | 2249 | static int __init usbnet_init(void) |
1da177e4 | 2250 | { |
c582a950 TF |
2251 | /* Compiler should optimize this out. */ |
2252 | BUILD_BUG_ON( | |
2253 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 2254 | |
c7e12ead | 2255 | eth_random_addr(node_id); |
cb1cebbe | 2256 | return 0; |
1da177e4 | 2257 | } |
f29fc259 | 2258 | module_init(usbnet_init); |
1da177e4 | 2259 | |
f29fc259 | 2260 | static void __exit usbnet_exit(void) |
1da177e4 | 2261 | { |
1da177e4 | 2262 | } |
f29fc259 | 2263 | module_exit(usbnet_exit); |
1da177e4 | 2264 | |
f29fc259 | 2265 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 2266 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 2267 | MODULE_LICENSE("GPL"); |