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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> |
5a0e3ad6 | 45 | #include <linux/slab.h> |
fd1f170d | 46 | #include <linux/kernel.h> |
b0786b43 | 47 | #include <linux/pm_runtime.h> |
f29fc259 DB |
48 | |
49 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
50 | |
51 | ||
52 | /*-------------------------------------------------------------------------*/ | |
53 | ||
54 | /* | |
55 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
56 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
57 | * One maximum size Ethernet packet takes twenty four of them. | |
58 | * For high speed, each frame comfortably fits almost 36 max size | |
59 | * Ethernet packets (so queues should be bigger). | |
f29fc259 | 60 | * |
a88c32ae ML |
61 | * The goal is to let the USB host controller be busy for 5msec or |
62 | * more before an irq is required, under load. Jumbograms change | |
63 | * the equation. | |
1da177e4 | 64 | */ |
a88c32ae ML |
65 | #define MAX_QUEUE_MEMORY (60 * 1518) |
66 | #define RX_QLEN(dev) ((dev)->rx_qlen) | |
67 | #define TX_QLEN(dev) ((dev)->tx_qlen) | |
1da177e4 | 68 | |
1da177e4 LT |
69 | // reawaken network queue this soon after stopping; else watchdog barks |
70 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
71 | ||
37ebb549 PM |
72 | /* throttle rx/tx briefly after some faults, so hub_wq might disconnect() |
73 | * us (it polls at HZ/4 usually) before we report too many false errors. | |
74 | */ | |
1da177e4 LT |
75 | #define THROTTLE_JIFFIES (HZ/8) |
76 | ||
1da177e4 LT |
77 | // between wakeups |
78 | #define UNLINK_TIMEOUT_MS 3 | |
79 | ||
80 | /*-------------------------------------------------------------------------*/ | |
81 | ||
82 | // randomly generated ethernet address | |
83 | static u8 node_id [ETH_ALEN]; | |
84 | ||
1da177e4 LT |
85 | static const char driver_name [] = "usbnet"; |
86 | ||
87 | /* use ethtool to change the level for any given device */ | |
88 | static int msg_level = -1; | |
89 | module_param (msg_level, int, 0); | |
90 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
91 | ||
1da177e4 LT |
92 | /*-------------------------------------------------------------------------*/ |
93 | ||
1da177e4 | 94 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 95 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
96 | { |
97 | int tmp; | |
98 | struct usb_host_interface *alt = NULL; | |
99 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
100 | struct usb_host_endpoint *status = NULL; | |
101 | ||
102 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
103 | unsigned ep; | |
104 | ||
105 | in = out = status = NULL; | |
106 | alt = intf->altsetting + tmp; | |
107 | ||
108 | /* take the first altsetting with in-bulk + out-bulk; | |
109 | * remember any status endpoint, just in case; | |
70f23fd6 | 110 | * ignore other endpoints and altsettings. |
1da177e4 LT |
111 | */ |
112 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
113 | struct usb_host_endpoint *e; | |
114 | int intr = 0; | |
115 | ||
116 | e = alt->endpoint + ep; | |
117 | switch (e->desc.bmAttributes) { | |
118 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 119 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
120 | continue; |
121 | intr = 1; | |
122 | /* FALLTHROUGH */ | |
123 | case USB_ENDPOINT_XFER_BULK: | |
124 | break; | |
125 | default: | |
126 | continue; | |
127 | } | |
fc6e2544 | 128 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
129 | if (!intr && !in) |
130 | in = e; | |
131 | else if (intr && !status) | |
132 | status = e; | |
133 | } else { | |
134 | if (!out) | |
135 | out = e; | |
136 | } | |
137 | } | |
138 | if (in && out) | |
139 | break; | |
140 | } | |
141 | if (!alt || !in || !out) | |
142 | return -EINVAL; | |
143 | ||
8e95a202 JP |
144 | if (alt->desc.bAlternateSetting != 0 || |
145 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
146 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
147 | alt->desc.bAlternateSetting); | |
148 | if (tmp < 0) | |
149 | return tmp; | |
150 | } | |
cb1cebbe | 151 | |
1da177e4 LT |
152 | dev->in = usb_rcvbulkpipe (dev->udev, |
153 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
154 | dev->out = usb_sndbulkpipe (dev->udev, | |
155 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
156 | dev->status = status; | |
157 | return 0; | |
158 | } | |
2e55cc72 | 159 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 160 | |
03ad032b PH |
161 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
162 | { | |
51487ae7 | 163 | int tmp = -1, ret; |
03ad032b PH |
164 | unsigned char buf [13]; |
165 | ||
51487ae7 AS |
166 | ret = usb_string(dev->udev, iMACAddress, buf, sizeof buf); |
167 | if (ret == 12) | |
168 | tmp = hex2bin(dev->net->dev_addr, buf, 6); | |
169 | if (tmp < 0) { | |
03ad032b PH |
170 | dev_dbg(&dev->udev->dev, |
171 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
51487ae7 AS |
172 | if (ret >= 0) |
173 | ret = -EINVAL; | |
174 | return ret; | |
03ad032b | 175 | } |
03ad032b PH |
176 | return 0; |
177 | } | |
178 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
179 | ||
24ead299 | 180 | static void intr_complete (struct urb *urb) |
181 | { | |
182 | struct usbnet *dev = urb->context; | |
183 | int status = urb->status; | |
184 | ||
185 | switch (status) { | |
186 | /* success */ | |
187 | case 0: | |
188 | dev->driver_info->status(dev, urb); | |
189 | break; | |
190 | ||
191 | /* software-driven interface shutdown */ | |
192 | case -ENOENT: /* urb killed */ | |
193 | case -ESHUTDOWN: /* hardware gone */ | |
194 | netif_dbg(dev, ifdown, dev->net, | |
195 | "intr shutdown, code %d\n", status); | |
196 | return; | |
197 | ||
198 | /* NOTE: not throttling like RX/TX, since this endpoint | |
199 | * already polls infrequently | |
200 | */ | |
201 | default: | |
202 | netdev_dbg(dev->net, "intr status %d\n", status); | |
203 | break; | |
204 | } | |
205 | ||
24ead299 | 206 | status = usb_submit_urb (urb, GFP_ATOMIC); |
207 | if (status != 0) | |
208 | netif_err(dev, timer, dev->net, | |
209 | "intr resubmit --> %d\n", status); | |
210 | } | |
1da177e4 LT |
211 | |
212 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
213 | { | |
214 | char *buf = NULL; | |
215 | unsigned pipe = 0; | |
216 | unsigned maxp; | |
217 | unsigned period; | |
218 | ||
219 | if (!dev->driver_info->status) | |
220 | return 0; | |
221 | ||
222 | pipe = usb_rcvintpipe (dev->udev, | |
223 | dev->status->desc.bEndpointAddress | |
224 | & USB_ENDPOINT_NUMBER_MASK); | |
225 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
226 | ||
227 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
228 | period = max ((int) dev->status->desc.bInterval, | |
229 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
230 | ||
e94b1766 | 231 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 232 | if (buf) { |
e94b1766 | 233 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
234 | if (!dev->interrupt) { |
235 | kfree (buf); | |
236 | return -ENOMEM; | |
237 | } else { | |
238 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
239 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 240 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
241 | dev_dbg(&intf->dev, |
242 | "status ep%din, %d bytes period %d\n", | |
243 | usb_pipeendpoint(pipe), maxp, period); | |
244 | } | |
245 | } | |
18ab458f | 246 | return 0; |
1da177e4 LT |
247 | } |
248 | ||
6eecdc5f DW |
249 | /* Submit the interrupt URB if not previously submitted, increasing refcount */ |
250 | int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags) | |
251 | { | |
252 | int ret = 0; | |
253 | ||
254 | WARN_ON_ONCE(dev->interrupt == NULL); | |
255 | if (dev->interrupt) { | |
256 | mutex_lock(&dev->interrupt_mutex); | |
257 | ||
258 | if (++dev->interrupt_count == 1) | |
259 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
260 | ||
261 | dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n", | |
262 | dev->interrupt_count); | |
263 | mutex_unlock(&dev->interrupt_mutex); | |
264 | } | |
265 | return ret; | |
266 | } | |
267 | EXPORT_SYMBOL_GPL(usbnet_status_start); | |
268 | ||
269 | /* For resume; submit interrupt URB if previously submitted */ | |
270 | static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags) | |
271 | { | |
272 | int ret = 0; | |
273 | ||
274 | mutex_lock(&dev->interrupt_mutex); | |
275 | if (dev->interrupt_count) { | |
276 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
277 | dev_dbg(&dev->udev->dev, | |
278 | "submitted interrupt URB for resume\n"); | |
279 | } | |
280 | mutex_unlock(&dev->interrupt_mutex); | |
281 | return ret; | |
282 | } | |
283 | ||
284 | /* Kill the interrupt URB if all submitters want it killed */ | |
285 | void usbnet_status_stop(struct usbnet *dev) | |
286 | { | |
287 | if (dev->interrupt) { | |
288 | mutex_lock(&dev->interrupt_mutex); | |
289 | WARN_ON(dev->interrupt_count == 0); | |
290 | ||
291 | if (dev->interrupt_count && --dev->interrupt_count == 0) | |
292 | usb_kill_urb(dev->interrupt); | |
293 | ||
294 | dev_dbg(&dev->udev->dev, | |
295 | "decremented interrupt URB count to %d\n", | |
296 | dev->interrupt_count); | |
297 | mutex_unlock(&dev->interrupt_mutex); | |
298 | } | |
299 | } | |
300 | EXPORT_SYMBOL_GPL(usbnet_status_stop); | |
301 | ||
302 | /* For suspend; always kill interrupt URB */ | |
303 | static void __usbnet_status_stop_force(struct usbnet *dev) | |
304 | { | |
305 | if (dev->interrupt) { | |
306 | mutex_lock(&dev->interrupt_mutex); | |
307 | usb_kill_urb(dev->interrupt); | |
308 | dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n"); | |
309 | mutex_unlock(&dev->interrupt_mutex); | |
310 | } | |
311 | } | |
312 | ||
2e55cc72 DB |
313 | /* Passes this packet up the stack, updating its accounting. |
314 | * Some link protocols batch packets, so their rx_fixup paths | |
315 | * can return clones as well as just modify the original skb. | |
316 | */ | |
317 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
318 | { |
319 | int status; | |
320 | ||
7834ddbc JK |
321 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
322 | skb_queue_tail(&dev->rxq_pause, skb); | |
323 | return; | |
324 | } | |
325 | ||
1da177e4 | 326 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
327 | dev->net->stats.rx_packets++; |
328 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 329 | |
a475f603 JP |
330 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
331 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 332 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
333 | |
334 | if (skb_defer_rx_timestamp(skb)) | |
335 | return; | |
336 | ||
1da177e4 | 337 | status = netif_rx (skb); |
a475f603 JP |
338 | if (status != NET_RX_SUCCESS) |
339 | netif_dbg(dev, rx_err, dev->net, | |
340 | "netif_rx status %d\n", status); | |
1da177e4 | 341 | } |
2e55cc72 | 342 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 343 | |
a88c32ae ML |
344 | /* must be called if hard_mtu or rx_urb_size changed */ |
345 | void usbnet_update_max_qlen(struct usbnet *dev) | |
346 | { | |
347 | enum usb_device_speed speed = dev->udev->speed; | |
348 | ||
349 | switch (speed) { | |
350 | case USB_SPEED_HIGH: | |
351 | dev->rx_qlen = MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
352 | dev->tx_qlen = MAX_QUEUE_MEMORY / dev->hard_mtu; | |
353 | break; | |
452c447a ML |
354 | case USB_SPEED_SUPER: |
355 | /* | |
356 | * Not take default 5ms qlen for super speed HC to | |
357 | * save memory, and iperf tests show 2.5ms qlen can | |
358 | * work well | |
359 | */ | |
360 | dev->rx_qlen = 5 * MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
361 | dev->tx_qlen = 5 * MAX_QUEUE_MEMORY / dev->hard_mtu; | |
362 | break; | |
a88c32ae ML |
363 | default: |
364 | dev->rx_qlen = dev->tx_qlen = 4; | |
365 | } | |
366 | } | |
367 | EXPORT_SYMBOL_GPL(usbnet_update_max_qlen); | |
368 | ||
1da177e4 LT |
369 | \f |
370 | /*------------------------------------------------------------------------- | |
371 | * | |
372 | * Network Device Driver (peer link to "Host Device", from USB host) | |
373 | * | |
374 | *-------------------------------------------------------------------------*/ | |
375 | ||
777baa47 | 376 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
377 | { |
378 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 379 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
380 | int old_hard_mtu = dev->hard_mtu; |
381 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 382 | |
a99c1949 | 383 | if (new_mtu <= 0) |
1da177e4 | 384 | return -EINVAL; |
1da177e4 | 385 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 386 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
387 | return -EDOM; |
388 | net->mtu = new_mtu; | |
a99c1949 JP |
389 | |
390 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
391 | if (dev->rx_urb_size == old_hard_mtu) { | |
392 | dev->rx_urb_size = dev->hard_mtu; | |
393 | if (dev->rx_urb_size > old_rx_urb_size) | |
394 | usbnet_unlink_rx_urbs(dev); | |
395 | } | |
396 | ||
a88c32ae ML |
397 | /* max qlen depend on hard_mtu and rx_urb_size */ |
398 | usbnet_update_max_qlen(dev); | |
399 | ||
1da177e4 LT |
400 | return 0; |
401 | } | |
777baa47 | 402 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 | 403 | |
5b6e9bcd ML |
404 | /* The caller must hold list->lock */ |
405 | static void __usbnet_queue_skb(struct sk_buff_head *list, | |
406 | struct sk_buff *newsk, enum skb_state state) | |
407 | { | |
408 | struct skb_data *entry = (struct skb_data *) newsk->cb; | |
409 | ||
410 | __skb_queue_tail(list, newsk); | |
411 | entry->state = state; | |
412 | } | |
413 | ||
1da177e4 LT |
414 | /*-------------------------------------------------------------------------*/ |
415 | ||
1da177e4 LT |
416 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
417 | * completion callbacks. 2.5 should have fixed those bugs... | |
418 | */ | |
419 | ||
5b6e9bcd ML |
420 | static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb, |
421 | struct sk_buff_head *list, enum skb_state state) | |
1da177e4 | 422 | { |
1da177e4 | 423 | unsigned long flags; |
5b6e9bcd ML |
424 | enum skb_state old_state; |
425 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1da177e4 | 426 | |
8728b834 | 427 | spin_lock_irqsave(&list->lock, flags); |
5b6e9bcd ML |
428 | old_state = entry->state; |
429 | entry->state = state; | |
8728b834 DM |
430 | __skb_unlink(skb, list); |
431 | spin_unlock(&list->lock); | |
432 | spin_lock(&dev->done.lock); | |
433 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 434 | if (dev->done.qlen == 1) |
8728b834 DM |
435 | tasklet_schedule(&dev->bh); |
436 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
5b6e9bcd | 437 | return old_state; |
1da177e4 LT |
438 | } |
439 | ||
440 | /* some work can't be done in tasklets, so we use keventd | |
441 | * | |
442 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
443 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
444 | */ | |
2e55cc72 | 445 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
446 | { |
447 | set_bit (work, &dev->flags); | |
9532021d SG |
448 | if (!schedule_work (&dev->kevent)) { |
449 | if (net_ratelimit()) | |
450 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
451 | } else { | |
60b86755 | 452 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 453 | } |
1da177e4 | 454 | } |
2e55cc72 | 455 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
456 | |
457 | /*-------------------------------------------------------------------------*/ | |
458 | ||
7d12e780 | 459 | static void rx_complete (struct urb *urb); |
1da177e4 | 460 | |
dacb3975 | 461 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
462 | { |
463 | struct sk_buff *skb; | |
464 | struct skb_data *entry; | |
465 | int retval = 0; | |
466 | unsigned long lockflags; | |
2e55cc72 | 467 | size_t size = dev->rx_urb_size; |
1da177e4 | 468 | |
70c37bf9 BM |
469 | /* prevent rx skb allocation when error ratio is high */ |
470 | if (test_bit(EVENT_RX_KILL, &dev->flags)) { | |
471 | usb_free_urb(urb); | |
472 | return -ENOLINK; | |
473 | } | |
474 | ||
7bdd4027 ED |
475 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
476 | if (!skb) { | |
a475f603 | 477 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 478 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 479 | usb_free_urb (urb); |
dacb3975 | 480 | return -ENOMEM; |
1da177e4 | 481 | } |
1da177e4 LT |
482 | |
483 | entry = (struct skb_data *) skb->cb; | |
484 | entry->urb = urb; | |
485 | entry->dev = dev; | |
1da177e4 LT |
486 | entry->length = 0; |
487 | ||
488 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
489 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
490 | |
491 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
492 | ||
8e95a202 JP |
493 | if (netif_running (dev->net) && |
494 | netif_device_present (dev->net) && | |
69ee472f ON |
495 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
496 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 497 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 498 | case -EPIPE: |
2e55cc72 | 499 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
500 | break; |
501 | case -ENOMEM: | |
2e55cc72 | 502 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
503 | break; |
504 | case -ENODEV: | |
a475f603 | 505 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
506 | netif_device_detach (dev->net); |
507 | break; | |
dacb3975 DM |
508 | case -EHOSTUNREACH: |
509 | retval = -ENOLINK; | |
510 | break; | |
1da177e4 | 511 | default: |
a475f603 JP |
512 | netif_dbg(dev, rx_err, dev->net, |
513 | "rx submit, %d\n", retval); | |
1da177e4 LT |
514 | tasklet_schedule (&dev->bh); |
515 | break; | |
516 | case 0: | |
5b6e9bcd | 517 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
518 | } |
519 | } else { | |
a475f603 | 520 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
521 | retval = -ENOLINK; |
522 | } | |
523 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
524 | if (retval) { | |
525 | dev_kfree_skb_any (skb); | |
526 | usb_free_urb (urb); | |
527 | } | |
dacb3975 | 528 | return retval; |
1da177e4 LT |
529 | } |
530 | ||
531 | ||
532 | /*-------------------------------------------------------------------------*/ | |
533 | ||
534 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
535 | { | |
8e95a202 | 536 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
537 | !dev->driver_info->rx_fixup (dev, skb)) { |
538 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
539 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
540 | dev->net->stats.rx_errors++; | |
541 | goto done; | |
542 | } | |
1da177e4 LT |
543 | // else network stack removes extra byte if we forced a short packet |
544 | ||
eb85569f EG |
545 | /* all data was already cloned from skb inside the driver */ |
546 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
547 | goto done; | |
548 | ||
549 | if (skb->len < ETH_HLEN) { | |
550 | dev->net->stats.rx_errors++; | |
551 | dev->net->stats.rx_length_errors++; | |
552 | netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len); | |
553 | } else { | |
554 | usbnet_skb_return(dev, skb); | |
073285fd | 555 | return; |
1da177e4 | 556 | } |
073285fd | 557 | |
7a635ea9 | 558 | done: |
073285fd | 559 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
560 | } |
561 | ||
562 | /*-------------------------------------------------------------------------*/ | |
563 | ||
7d12e780 | 564 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
565 | { |
566 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
567 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
568 | struct usbnet *dev = entry->dev; | |
569 | int urb_status = urb->status; | |
5b6e9bcd | 570 | enum skb_state state; |
1da177e4 LT |
571 | |
572 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 573 | state = rx_done; |
1da177e4 LT |
574 | entry->urb = NULL; |
575 | ||
576 | switch (urb_status) { | |
18ab458f DB |
577 | /* success */ |
578 | case 0: | |
1da177e4 LT |
579 | break; |
580 | ||
18ab458f DB |
581 | /* stalls need manual reset. this is rare ... except that |
582 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 583 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
584 | * storm, recovering as needed. |
585 | */ | |
586 | case -EPIPE: | |
7963837f | 587 | dev->net->stats.rx_errors++; |
2e55cc72 | 588 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
589 | // FALLTHROUGH |
590 | ||
18ab458f DB |
591 | /* software-driven interface shutdown */ |
592 | case -ECONNRESET: /* async unlink */ | |
593 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
594 | netif_dbg(dev, ifdown, dev->net, |
595 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
596 | goto block; |
597 | ||
37ebb549 | 598 | /* we get controller i/o faults during hub_wq disconnect() delays. |
18ab458f | 599 | * throttle down resubmits, to avoid log floods; just temporarily, |
37ebb549 | 600 | * so we still recover when the fault isn't a hub_wq delay. |
18ab458f DB |
601 | */ |
602 | case -EPROTO: | |
603 | case -ETIME: | |
604 | case -EILSEQ: | |
7963837f | 605 | dev->net->stats.rx_errors++; |
1da177e4 LT |
606 | if (!timer_pending (&dev->delay)) { |
607 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
608 | netif_dbg(dev, link, dev->net, |
609 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
610 | } |
611 | block: | |
5b6e9bcd | 612 | state = rx_cleanup; |
1da177e4 LT |
613 | entry->urb = urb; |
614 | urb = NULL; | |
615 | break; | |
616 | ||
18ab458f DB |
617 | /* data overrun ... flush fifo? */ |
618 | case -EOVERFLOW: | |
7963837f | 619 | dev->net->stats.rx_over_errors++; |
1da177e4 | 620 | // FALLTHROUGH |
cb1cebbe | 621 | |
18ab458f | 622 | default: |
5b6e9bcd | 623 | state = rx_cleanup; |
7963837f | 624 | dev->net->stats.rx_errors++; |
a475f603 | 625 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
626 | break; |
627 | } | |
628 | ||
70c37bf9 BM |
629 | /* stop rx if packet error rate is high */ |
630 | if (++dev->pkt_cnt > 30) { | |
631 | dev->pkt_cnt = 0; | |
632 | dev->pkt_err = 0; | |
633 | } else { | |
634 | if (state == rx_cleanup) | |
635 | dev->pkt_err++; | |
636 | if (dev->pkt_err > 20) | |
637 | set_bit(EVENT_RX_KILL, &dev->flags); | |
638 | } | |
639 | ||
5b6e9bcd | 640 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
641 | |
642 | if (urb) { | |
8e95a202 | 643 | if (netif_running (dev->net) && |
5b6e9bcd ML |
644 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
645 | state != unlink_start) { | |
1da177e4 | 646 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 647 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
648 | return; |
649 | } | |
650 | usb_free_urb (urb); | |
651 | } | |
a475f603 | 652 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
653 | } |
654 | ||
7834ddbc JK |
655 | /*-------------------------------------------------------------------------*/ |
656 | void usbnet_pause_rx(struct usbnet *dev) | |
657 | { | |
658 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
659 | ||
a475f603 | 660 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
661 | } |
662 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
663 | ||
664 | void usbnet_resume_rx(struct usbnet *dev) | |
665 | { | |
666 | struct sk_buff *skb; | |
667 | int num = 0; | |
668 | ||
669 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
670 | ||
671 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
672 | usbnet_skb_return(dev, skb); | |
673 | num++; | |
674 | } | |
675 | ||
676 | tasklet_schedule(&dev->bh); | |
677 | ||
a475f603 JP |
678 | netif_dbg(dev, rx_status, dev->net, |
679 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
680 | } |
681 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
682 | ||
683 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
684 | { | |
685 | skb_queue_purge(&dev->rxq_pause); | |
686 | } | |
687 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
688 | ||
1da177e4 LT |
689 | /*-------------------------------------------------------------------------*/ |
690 | ||
691 | // unlink pending rx/tx; completion handlers do all other cleanup | |
692 | ||
693 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
694 | { | |
695 | unsigned long flags; | |
5b6e9bcd | 696 | struct sk_buff *skb; |
1da177e4 LT |
697 | int count = 0; |
698 | ||
699 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 700 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
701 | struct skb_data *entry; |
702 | struct urb *urb; | |
703 | int retval; | |
704 | ||
5b6e9bcd ML |
705 | skb_queue_walk(q, skb) { |
706 | entry = (struct skb_data *) skb->cb; | |
707 | if (entry->state != unlink_start) | |
708 | goto found; | |
709 | } | |
710 | break; | |
711 | found: | |
712 | entry->state = unlink_start; | |
1da177e4 | 713 | urb = entry->urb; |
1da177e4 | 714 | |
0956a8c2 | 715 | /* |
716 | * Get reference count of the URB to avoid it to be | |
717 | * freed during usb_unlink_urb, which may trigger | |
718 | * use-after-free problem inside usb_unlink_urb since | |
719 | * usb_unlink_urb is always racing with .complete | |
720 | * handler(include defer_bh). | |
721 | */ | |
722 | usb_get_urb(urb); | |
4231d47e | 723 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
724 | // during some PM-driven resume scenarios, |
725 | // these (async) unlinks complete immediately | |
726 | retval = usb_unlink_urb (urb); | |
727 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 728 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
729 | else |
730 | count++; | |
0956a8c2 | 731 | usb_put_urb(urb); |
4231d47e | 732 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
733 | } |
734 | spin_unlock_irqrestore (&q->lock, flags); | |
735 | return count; | |
736 | } | |
737 | ||
a99c1949 JP |
738 | // Flush all pending rx urbs |
739 | // minidrivers may need to do this when the MTU changes | |
740 | ||
741 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
742 | { | |
743 | if (netif_running(dev->net)) { | |
744 | (void) unlink_urbs (dev, &dev->rxq); | |
745 | tasklet_schedule(&dev->bh); | |
746 | } | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
749 | |
750 | /*-------------------------------------------------------------------------*/ | |
751 | ||
752 | // precondition: never called in_interrupt | |
69ee472f ON |
753 | static void usbnet_terminate_urbs(struct usbnet *dev) |
754 | { | |
69ee472f ON |
755 | DECLARE_WAITQUEUE(wait, current); |
756 | int temp; | |
757 | ||
758 | /* ensure there are no more active urbs */ | |
14a0d635 | 759 | add_wait_queue(&dev->wait, &wait); |
69ee472f | 760 | set_current_state(TASK_UNINTERRUPTIBLE); |
69ee472f ON |
761 | temp = unlink_urbs(dev, &dev->txq) + |
762 | unlink_urbs(dev, &dev->rxq); | |
763 | ||
764 | /* maybe wait for deletions to finish. */ | |
765 | while (!skb_queue_empty(&dev->rxq) | |
766 | && !skb_queue_empty(&dev->txq) | |
767 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 768 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 769 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
770 | netif_dbg(dev, ifdown, dev->net, |
771 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
772 | } |
773 | set_current_state(TASK_RUNNING); | |
14a0d635 | 774 | remove_wait_queue(&dev->wait, &wait); |
69ee472f | 775 | } |
1da177e4 | 776 | |
777baa47 | 777 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
778 | { |
779 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 780 | struct driver_info *info = dev->driver_info; |
f50791ac | 781 | int retval, pm, mpn; |
1da177e4 | 782 | |
75bd0cbd | 783 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
784 | netif_stop_queue (net); |
785 | ||
a475f603 | 786 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 787 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
788 | net->stats.rx_packets, net->stats.tx_packets, |
789 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 790 | |
14a0d635 ON |
791 | /* to not race resume */ |
792 | pm = usb_autopm_get_interface(dev->intf); | |
a33e9e7f JK |
793 | /* allow minidriver to stop correctly (wireless devices to turn off |
794 | * radio etc) */ | |
795 | if (info->stop) { | |
796 | retval = info->stop(dev); | |
a475f603 JP |
797 | if (retval < 0) |
798 | netif_info(dev, ifdown, dev->net, | |
799 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
800 | retval, | |
801 | dev->udev->bus->bus_name, dev->udev->devpath, | |
802 | info->description); | |
a33e9e7f JK |
803 | } |
804 | ||
69ee472f ON |
805 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
806 | usbnet_terminate_urbs(dev); | |
1da177e4 | 807 | |
6eecdc5f | 808 | usbnet_status_stop(dev); |
1da177e4 | 809 | |
7834ddbc JK |
810 | usbnet_purge_paused_rxq(dev); |
811 | ||
f50791ac ES |
812 | mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags); |
813 | ||
1da177e4 LT |
814 | /* deferred work (task, timer, softirq) must also stop. |
815 | * can't flush_scheduled_work() until we drop rtnl (later), | |
816 | * else workers could deadlock; so make workers a NOP. | |
817 | */ | |
818 | dev->flags = 0; | |
819 | del_timer_sync (&dev->delay); | |
820 | tasklet_kill (&dev->bh); | |
14a0d635 ON |
821 | if (!pm) |
822 | usb_autopm_put_interface(dev->intf); | |
823 | ||
f50791ac | 824 | if (info->manage_power && mpn) |
69ee472f ON |
825 | info->manage_power(dev, 0); |
826 | else | |
827 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
828 | |
829 | return 0; | |
830 | } | |
777baa47 | 831 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
832 | |
833 | /*-------------------------------------------------------------------------*/ | |
834 | ||
835 | // posts reads, and enables write queuing | |
836 | ||
837 | // precondition: never called in_interrupt | |
838 | ||
777baa47 | 839 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
840 | { |
841 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 842 | int retval; |
1da177e4 LT |
843 | struct driver_info *info = dev->driver_info; |
844 | ||
a11a6544 | 845 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
846 | netif_info(dev, ifup, dev->net, |
847 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
848 | retval, | |
849 | dev->udev->bus->bus_name, | |
850 | dev->udev->devpath, | |
851 | info->description); | |
a11a6544 ON |
852 | goto done_nopm; |
853 | } | |
854 | ||
1da177e4 LT |
855 | // put into "known safe" state |
856 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
857 | netif_info(dev, ifup, dev->net, |
858 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
859 | retval, | |
860 | dev->udev->bus->bus_name, | |
861 | dev->udev->devpath, | |
862 | info->description); | |
1da177e4 LT |
863 | goto done; |
864 | } | |
865 | ||
a88c32ae ML |
866 | /* hard_mtu or rx_urb_size may change in reset() */ |
867 | usbnet_update_max_qlen(dev); | |
868 | ||
1da177e4 LT |
869 | // insist peer be connected |
870 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 871 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
872 | goto done; |
873 | } | |
874 | ||
875 | /* start any status interrupt transfer */ | |
876 | if (dev->interrupt) { | |
6eecdc5f | 877 | retval = usbnet_status_start(dev, GFP_KERNEL); |
1da177e4 | 878 | if (retval < 0) { |
a475f603 JP |
879 | netif_err(dev, ifup, dev->net, |
880 | "intr submit %d\n", retval); | |
1da177e4 LT |
881 | goto done; |
882 | } | |
883 | } | |
884 | ||
68972efa | 885 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 886 | netif_start_queue (net); |
a475f603 JP |
887 | netif_info(dev, ifup, dev->net, |
888 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
889 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
890 | dev->net->mtu, | |
891 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
892 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
893 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
894 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
895 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
896 | "simple"); | |
1da177e4 | 897 | |
70c37bf9 BM |
898 | /* reset rx error state */ |
899 | dev->pkt_cnt = 0; | |
900 | dev->pkt_err = 0; | |
901 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
902 | ||
1da177e4 LT |
903 | // delay posting reads until we're fully open |
904 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
905 | if (info->manage_power) { |
906 | retval = info->manage_power(dev, 1); | |
a1c088e0 ON |
907 | if (retval < 0) { |
908 | retval = 0; | |
909 | set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); | |
910 | } else { | |
911 | usb_autopm_put_interface(dev->intf); | |
912 | } | |
69ee472f | 913 | } |
a11a6544 | 914 | return retval; |
1da177e4 | 915 | done: |
a11a6544 ON |
916 | usb_autopm_put_interface(dev->intf); |
917 | done_nopm: | |
1da177e4 LT |
918 | return retval; |
919 | } | |
777baa47 | 920 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
921 | |
922 | /*-------------------------------------------------------------------------*/ | |
923 | ||
2e55cc72 DB |
924 | /* ethtool methods; minidrivers may need to add some more, but |
925 | * they'll probably want to use this base set. | |
926 | */ | |
927 | ||
c41286fd AB |
928 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
929 | { | |
930 | struct usbnet *dev = netdev_priv(net); | |
931 | ||
932 | if (!dev->mii.mdio_read) | |
933 | return -EOPNOTSUPP; | |
934 | ||
935 | return mii_ethtool_gset(&dev->mii, cmd); | |
936 | } | |
937 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
938 | ||
939 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
940 | { | |
941 | struct usbnet *dev = netdev_priv(net); | |
942 | int retval; | |
943 | ||
944 | if (!dev->mii.mdio_write) | |
945 | return -EOPNOTSUPP; | |
946 | ||
947 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
948 | ||
949 | /* link speed/duplex might have changed */ | |
950 | if (dev->driver_info->link_reset) | |
951 | dev->driver_info->link_reset(dev); | |
952 | ||
a88c32ae ML |
953 | /* hard_mtu or rx_urb_size may change in link_reset() */ |
954 | usbnet_update_max_qlen(dev); | |
955 | ||
c41286fd AB |
956 | return retval; |
957 | ||
958 | } | |
959 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
960 | ||
c41286fd | 961 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
962 | { |
963 | struct usbnet *dev = netdev_priv(net); | |
964 | ||
f29fc259 | 965 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
966 | if (dev->driver_info->check_connect) |
967 | return dev->driver_info->check_connect (dev) == 0; | |
968 | ||
c41286fd AB |
969 | /* if the device has mii operations, use those */ |
970 | if (dev->mii.mdio_read) | |
971 | return mii_link_ok(&dev->mii); | |
972 | ||
05ffb3e2 BM |
973 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
974 | return ethtool_op_get_link(net); | |
1da177e4 | 975 | } |
c41286fd | 976 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 977 | |
18ee91fa | 978 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
979 | { |
980 | struct usbnet *dev = netdev_priv(net); | |
981 | ||
18ee91fa DB |
982 | if (!dev->mii.mdio_write) |
983 | return -EOPNOTSUPP; | |
984 | ||
985 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 986 | } |
18ee91fa | 987 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 988 | |
18ee91fa | 989 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
990 | { |
991 | struct usbnet *dev = netdev_priv(net); | |
992 | ||
86a2f415 PS |
993 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
994 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
995 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
996 | sizeof info->fw_version); |
997 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 998 | } |
18ee91fa | 999 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 1000 | |
18ee91fa | 1001 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
1002 | { |
1003 | struct usbnet *dev = netdev_priv(net); | |
1004 | ||
18ee91fa DB |
1005 | return dev->msg_enable; |
1006 | } | |
1007 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 1008 | |
18ee91fa DB |
1009 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
1010 | { | |
1011 | struct usbnet *dev = netdev_priv(net); | |
1012 | ||
1013 | dev->msg_enable = level; | |
c41286fd | 1014 | } |
18ee91fa | 1015 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 1016 | |
2e55cc72 | 1017 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 1018 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
1019 | .get_settings = usbnet_get_settings, |
1020 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 1021 | .get_link = usbnet_get_link, |
c41286fd | 1022 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 1023 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
1024 | .get_msglevel = usbnet_get_msglevel, |
1025 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 1026 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 1027 | }; |
1da177e4 LT |
1028 | |
1029 | /*-------------------------------------------------------------------------*/ | |
1030 | ||
4b49f58f ML |
1031 | static void __handle_link_change(struct usbnet *dev) |
1032 | { | |
1033 | if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1034 | return; | |
1035 | ||
1036 | if (!netif_carrier_ok(dev->net)) { | |
1037 | /* kill URBs for reading packets to save bus bandwidth */ | |
1038 | unlink_urbs(dev, &dev->rxq); | |
1039 | ||
1040 | /* | |
1041 | * tx_timeout will unlink URBs for sending packets and | |
1042 | * tx queue is stopped by netcore after link becomes off | |
1043 | */ | |
1044 | } else { | |
1045 | /* submitting URBs for reading packets */ | |
1046 | tasklet_schedule(&dev->bh); | |
1047 | } | |
1048 | ||
a88c32ae ML |
1049 | /* hard_mtu or rx_urb_size may change during link change */ |
1050 | usbnet_update_max_qlen(dev); | |
1051 | ||
4b49f58f ML |
1052 | clear_bit(EVENT_LINK_CHANGE, &dev->flags); |
1053 | } | |
1054 | ||
1efed2d0 OB |
1055 | static void usbnet_set_rx_mode(struct net_device *net) |
1056 | { | |
1057 | struct usbnet *dev = netdev_priv(net); | |
1058 | ||
1059 | usbnet_defer_kevent(dev, EVENT_SET_RX_MODE); | |
1060 | } | |
1061 | ||
1062 | static void __handle_set_rx_mode(struct usbnet *dev) | |
1063 | { | |
1064 | if (dev->driver_info->set_rx_mode) | |
1065 | (dev->driver_info->set_rx_mode)(dev); | |
1066 | ||
1067 | clear_bit(EVENT_SET_RX_MODE, &dev->flags); | |
1068 | } | |
1069 | ||
1da177e4 LT |
1070 | /* work that cannot be done in interrupt context uses keventd. |
1071 | * | |
1072 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
1073 | * especially now that control transfers can be queued. | |
1074 | */ | |
1075 | static void | |
11f17ef3 | 1076 | usbnet_deferred_kevent (struct work_struct *work) |
1da177e4 | 1077 | { |
c4028958 DH |
1078 | struct usbnet *dev = |
1079 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
1080 | int status; |
1081 | ||
1082 | /* usb_clear_halt() needs a thread context */ | |
1083 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
1084 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
1085 | status = usb_autopm_get_interface(dev->intf); |
1086 | if (status < 0) | |
1087 | goto fail_pipe; | |
1da177e4 | 1088 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 1089 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1090 | if (status < 0 && |
1091 | status != -EPIPE && | |
1092 | status != -ESHUTDOWN) { | |
1da177e4 | 1093 | if (netif_msg_tx_err (dev)) |
69ee472f | 1094 | fail_pipe: |
60b86755 JP |
1095 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
1096 | status); | |
1da177e4 LT |
1097 | } else { |
1098 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
1099 | if (status != -ESHUTDOWN) |
1100 | netif_wake_queue (dev->net); | |
1da177e4 LT |
1101 | } |
1102 | } | |
1103 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1104 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
1105 | status = usb_autopm_get_interface(dev->intf); |
1106 | if (status < 0) | |
1107 | goto fail_halt; | |
1da177e4 | 1108 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 1109 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1110 | if (status < 0 && |
1111 | status != -EPIPE && | |
1112 | status != -ESHUTDOWN) { | |
1da177e4 | 1113 | if (netif_msg_rx_err (dev)) |
69ee472f | 1114 | fail_halt: |
60b86755 JP |
1115 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
1116 | status); | |
1da177e4 LT |
1117 | } else { |
1118 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
1119 | tasklet_schedule (&dev->bh); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | /* tasklet could resubmit itself forever if memory is tight */ | |
1124 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
1125 | struct urb *urb = NULL; | |
dacb3975 | 1126 | int resched = 1; |
1da177e4 LT |
1127 | |
1128 | if (netif_running (dev->net)) | |
1129 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
1130 | else | |
1131 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
1132 | if (urb != NULL) { | |
1133 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 1134 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
1135 | if (status < 0) { |
1136 | usb_free_urb(urb); | |
69ee472f | 1137 | goto fail_lowmem; |
ab60707f | 1138 | } |
dacb3975 DM |
1139 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
1140 | resched = 0; | |
69ee472f ON |
1141 | usb_autopm_put_interface(dev->intf); |
1142 | fail_lowmem: | |
dacb3975 DM |
1143 | if (resched) |
1144 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
1145 | } |
1146 | } | |
1147 | ||
7ea13c9c | 1148 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 1149 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
1150 | int retval = 0; |
1151 | ||
1152 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1153 | status = usb_autopm_get_interface(dev->intf); |
1154 | if (status < 0) | |
1155 | goto skip_reset; | |
7ea13c9c | 1156 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1157 | usb_autopm_put_interface(dev->intf); |
1158 | skip_reset: | |
60b86755 JP |
1159 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1160 | retval, | |
1161 | dev->udev->bus->bus_name, | |
1162 | dev->udev->devpath, | |
1163 | info->description); | |
69ee472f ON |
1164 | } else { |
1165 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c | 1166 | } |
4b49f58f ML |
1167 | |
1168 | /* handle link change from link resetting */ | |
1169 | __handle_link_change(dev); | |
7ea13c9c DH |
1170 | } |
1171 | ||
4b49f58f ML |
1172 | if (test_bit (EVENT_LINK_CHANGE, &dev->flags)) |
1173 | __handle_link_change(dev); | |
1174 | ||
1efed2d0 OB |
1175 | if (test_bit (EVENT_SET_RX_MODE, &dev->flags)) |
1176 | __handle_set_rx_mode(dev); | |
1177 | ||
1178 | ||
1da177e4 | 1179 | if (dev->flags) |
60b86755 | 1180 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | /*-------------------------------------------------------------------------*/ | |
1184 | ||
7d12e780 | 1185 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1186 | { |
1187 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1188 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1189 | struct usbnet *dev = entry->dev; | |
1190 | ||
1191 | if (urb->status == 0) { | |
1e9e39f4 | 1192 | dev->net->stats.tx_packets += entry->packets; |
7963837f | 1193 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1194 | } else { |
7963837f | 1195 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1196 | |
1197 | switch (urb->status) { | |
1198 | case -EPIPE: | |
2e55cc72 | 1199 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1200 | break; |
1201 | ||
1202 | /* software-driven interface shutdown */ | |
1203 | case -ECONNRESET: // async unlink | |
1204 | case -ESHUTDOWN: // hardware gone | |
1205 | break; | |
1206 | ||
37ebb549 PM |
1207 | /* like rx, tx gets controller i/o faults during hub_wq |
1208 | * delays and so it uses the same throttling mechanism. | |
1209 | */ | |
38e2bfc9 PZ |
1210 | case -EPROTO: |
1211 | case -ETIME: | |
1212 | case -EILSEQ: | |
69ee472f | 1213 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1214 | if (!timer_pending (&dev->delay)) { |
1215 | mod_timer (&dev->delay, | |
1216 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1217 | netif_dbg(dev, link, dev->net, |
1218 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1219 | } |
1220 | netif_stop_queue (dev->net); | |
1221 | break; | |
1222 | default: | |
a475f603 JP |
1223 | netif_dbg(dev, tx_err, dev->net, |
1224 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1225 | break; |
1226 | } | |
1227 | } | |
1228 | ||
69ee472f | 1229 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1230 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | /*-------------------------------------------------------------------------*/ | |
1234 | ||
777baa47 | 1235 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1236 | { |
1237 | struct usbnet *dev = netdev_priv(net); | |
1238 | ||
1239 | unlink_urbs (dev, &dev->txq); | |
1240 | tasklet_schedule (&dev->bh); | |
dbcdd4d5 ON |
1241 | /* this needs to be handled individually because the generic layer |
1242 | * doesn't know what is sufficient and could not restore private | |
1243 | * information if a remedy of an unconditional reset were used. | |
1244 | */ | |
1245 | if (dev->driver_info->recover) | |
1246 | (dev->driver_info->recover)(dev); | |
1da177e4 | 1247 | } |
777baa47 | 1248 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1249 | |
1250 | /*-------------------------------------------------------------------------*/ | |
1251 | ||
638c5115 ML |
1252 | static int build_dma_sg(const struct sk_buff *skb, struct urb *urb) |
1253 | { | |
1254 | unsigned num_sgs, total_len = 0; | |
1255 | int i, s = 0; | |
1256 | ||
1257 | num_sgs = skb_shinfo(skb)->nr_frags + 1; | |
1258 | if (num_sgs == 1) | |
1259 | return 0; | |
1260 | ||
60e453a9 ML |
1261 | /* reserve one for zero packet */ |
1262 | urb->sg = kmalloc((num_sgs + 1) * sizeof(struct scatterlist), | |
1263 | GFP_ATOMIC); | |
638c5115 ML |
1264 | if (!urb->sg) |
1265 | return -ENOMEM; | |
1266 | ||
1267 | urb->num_sgs = num_sgs; | |
fdc3452c | 1268 | sg_init_table(urb->sg, urb->num_sgs + 1); |
638c5115 ML |
1269 | |
1270 | sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb)); | |
1271 | total_len += skb_headlen(skb); | |
1272 | ||
1273 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1274 | struct skb_frag_struct *f = &skb_shinfo(skb)->frags[i]; | |
1275 | ||
1276 | total_len += skb_frag_size(f); | |
1277 | sg_set_page(&urb->sg[i + s], f->page.p, f->size, | |
1278 | f->page_offset); | |
1279 | } | |
1280 | urb->transfer_buffer_length = total_len; | |
1281 | ||
1282 | return 1; | |
1283 | } | |
1284 | ||
25a79c41 SH |
1285 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1286 | struct net_device *net) | |
1da177e4 LT |
1287 | { |
1288 | struct usbnet *dev = netdev_priv(net); | |
3e4336a6 | 1289 | unsigned int length; |
1da177e4 LT |
1290 | struct urb *urb = NULL; |
1291 | struct skb_data *entry; | |
1292 | struct driver_info *info = dev->driver_info; | |
1293 | unsigned long flags; | |
25a79c41 | 1294 | int retval; |
1da177e4 | 1295 | |
23ba0799 KK |
1296 | if (skb) |
1297 | skb_tx_timestamp(skb); | |
f9b491ec | 1298 | |
1da177e4 LT |
1299 | // some devices want funky USB-level framing, for |
1300 | // win32 driver (usually) and/or hardware quirks | |
1301 | if (info->tx_fixup) { | |
1302 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1303 | if (!skb) { | |
bf414b36 BM |
1304 | /* packet collected; minidriver waiting for more */ |
1305 | if (info->flags & FLAG_MULTI_PACKET) | |
073285fd | 1306 | goto not_drop; |
bf414b36 BM |
1307 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1308 | goto drop; | |
1da177e4 LT |
1309 | } |
1310 | } | |
1da177e4 LT |
1311 | |
1312 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1313 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1314 | goto drop; |
1315 | } | |
1316 | ||
1317 | entry = (struct skb_data *) skb->cb; | |
1318 | entry->urb = urb; | |
1319 | entry->dev = dev; | |
1da177e4 | 1320 | |
1da177e4 LT |
1321 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1322 | skb->data, skb->len, tx_complete, skb); | |
638c5115 ML |
1323 | if (dev->can_dma_sg) { |
1324 | if (build_dma_sg(skb, urb) < 0) | |
1325 | goto drop; | |
1326 | } | |
60e453a9 | 1327 | length = urb->transfer_buffer_length; |
1da177e4 LT |
1328 | |
1329 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1330 | * NOTE: strictly conforming cdc-ether devices should expect | |
1331 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1332 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1333 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1334 | * packet itself if needed. | |
1da177e4 | 1335 | */ |
b4d562e3 EP |
1336 | if (length % dev->maxpacket == 0) { |
1337 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd | 1338 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
60e453a9 ML |
1339 | length++; |
1340 | if (skb_tailroom(skb) && !urb->num_sgs) { | |
073285fd AO |
1341 | skb->data[skb->len] = 0; |
1342 | __skb_put(skb, 1); | |
60e453a9 ML |
1343 | } else if (urb->num_sgs) |
1344 | sg_set_buf(&urb->sg[urb->num_sgs++], | |
1345 | dev->padding_pkt, 1); | |
b4d562e3 EP |
1346 | } |
1347 | } else | |
1348 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1349 | } |
7a1e890e BH |
1350 | urb->transfer_buffer_length = length; |
1351 | ||
1352 | if (info->flags & FLAG_MULTI_PACKET) { | |
1353 | /* Driver has set number of packets and a length delta. | |
1354 | * Calculate the complete length and ensure that it's | |
1355 | * positive. | |
1356 | */ | |
1357 | entry->length += length; | |
1358 | if (WARN_ON_ONCE(entry->length <= 0)) | |
1359 | entry->length = length; | |
1360 | } else { | |
1361 | usbnet_set_skb_tx_stats(skb, 1, length); | |
1362 | } | |
1da177e4 | 1363 | |
69ee472f ON |
1364 | spin_lock_irqsave(&dev->txq.lock, flags); |
1365 | retval = usb_autopm_get_interface_async(dev->intf); | |
1366 | if (retval < 0) { | |
1367 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1368 | goto drop; | |
1369 | } | |
1370 | ||
1371 | #ifdef CONFIG_PM | |
1372 | /* if this triggers the device is still a sleep */ | |
1373 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1374 | /* transmission will be done in resume */ | |
1375 | usb_anchor_urb(urb, &dev->deferred); | |
1376 | /* no use to process more packets */ | |
1377 | netif_stop_queue(net); | |
39707c2a | 1378 | usb_put_urb(urb); |
69ee472f | 1379 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1380 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1381 | goto deferred; |
1382 | } | |
1383 | #endif | |
1da177e4 | 1384 | |
1da177e4 LT |
1385 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1386 | case -EPIPE: | |
1387 | netif_stop_queue (net); | |
2e55cc72 | 1388 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1389 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1390 | break; |
1391 | default: | |
69ee472f | 1392 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1393 | netif_dbg(dev, tx_err, dev->net, |
1394 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1395 | break; |
1396 | case 0: | |
1397 | net->trans_start = jiffies; | |
5b6e9bcd | 1398 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1399 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1400 | netif_stop_queue (net); | |
1401 | } | |
1402 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1403 | ||
1404 | if (retval) { | |
a475f603 | 1405 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1406 | drop: |
7963837f | 1407 | dev->net->stats.tx_dropped++; |
073285fd | 1408 | not_drop: |
1da177e4 LT |
1409 | if (skb) |
1410 | dev_kfree_skb_any (skb); | |
638c5115 ML |
1411 | if (urb) { |
1412 | kfree(urb->sg); | |
1413 | usb_free_urb(urb); | |
1414 | } | |
a475f603 JP |
1415 | } else |
1416 | netif_dbg(dev, tx_queued, dev->net, | |
3e4336a6 | 1417 | "> tx, len %u, type 0x%x\n", length, skb->protocol); |
69ee472f ON |
1418 | #ifdef CONFIG_PM |
1419 | deferred: | |
1420 | #endif | |
25a79c41 | 1421 | return NETDEV_TX_OK; |
1da177e4 | 1422 | } |
777baa47 | 1423 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1424 | |
85e87870 | 1425 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1426 | { |
1427 | struct urb *urb; | |
1428 | int i; | |
85e87870 | 1429 | int ret = 0; |
65841fd5 ML |
1430 | |
1431 | /* don't refill the queue all at once */ | |
1432 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1433 | urb = usb_alloc_urb(0, flags); | |
1434 | if (urb != NULL) { | |
85e87870 BM |
1435 | ret = rx_submit(dev, urb, flags); |
1436 | if (ret) | |
1437 | goto err; | |
1438 | } else { | |
1439 | ret = -ENOMEM; | |
1440 | goto err; | |
65841fd5 ML |
1441 | } |
1442 | } | |
85e87870 BM |
1443 | err: |
1444 | return ret; | |
65841fd5 ML |
1445 | } |
1446 | ||
1da177e4 LT |
1447 | /*-------------------------------------------------------------------------*/ |
1448 | ||
1449 | // tasklet (work deferred from completions, in_irq) or timer | |
1450 | ||
1451 | static void usbnet_bh (unsigned long param) | |
1452 | { | |
1453 | struct usbnet *dev = (struct usbnet *) param; | |
1454 | struct sk_buff *skb; | |
1455 | struct skb_data *entry; | |
1456 | ||
1457 | while ((skb = skb_dequeue (&dev->done))) { | |
1458 | entry = (struct skb_data *) skb->cb; | |
1459 | switch (entry->state) { | |
18ab458f | 1460 | case rx_done: |
1da177e4 LT |
1461 | entry->state = rx_cleanup; |
1462 | rx_process (dev, skb); | |
1463 | continue; | |
18ab458f | 1464 | case tx_done: |
638c5115 | 1465 | kfree(entry->urb->sg); |
18ab458f | 1466 | case rx_cleanup: |
1da177e4 LT |
1467 | usb_free_urb (entry->urb); |
1468 | dev_kfree_skb (skb); | |
1469 | continue; | |
18ab458f | 1470 | default: |
60b86755 | 1471 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1472 | } |
1473 | } | |
1474 | ||
70c37bf9 BM |
1475 | /* restart RX again after disabling due to high error rate */ |
1476 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
1477 | ||
14a0d635 ON |
1478 | /* waiting for all pending urbs to complete? |
1479 | * only then can we forgo submitting anew | |
1480 | */ | |
1481 | if (waitqueue_active(&dev->wait)) { | |
1482 | if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0) | |
1483 | wake_up_all(&dev->wait); | |
1da177e4 LT |
1484 | |
1485 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1486 | } else if (netif_running (dev->net) && |
1487 | netif_device_present (dev->net) && | |
4b49f58f | 1488 | netif_carrier_ok(dev->net) && |
8e95a202 JP |
1489 | !timer_pending (&dev->delay) && |
1490 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1491 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1492 | |
1493 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1494 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1495 | return; | |
a475f603 JP |
1496 | if (temp != dev->rxq.qlen) |
1497 | netif_dbg(dev, link, dev->net, | |
1498 | "rxqlen %d --> %d\n", | |
1499 | temp, dev->rxq.qlen); | |
65841fd5 | 1500 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1501 | tasklet_schedule (&dev->bh); |
1502 | } | |
1503 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1504 | netif_wake_queue (dev->net); | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | ||
1da177e4 LT |
1509 | /*------------------------------------------------------------------------- |
1510 | * | |
1511 | * USB Device Driver support | |
1512 | * | |
1513 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1514 | |
1da177e4 LT |
1515 | // precondition: never called in_interrupt |
1516 | ||
38bde1d4 | 1517 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1518 | { |
1519 | struct usbnet *dev; | |
1520 | struct usb_device *xdev; | |
1521 | struct net_device *net; | |
1522 | ||
1523 | dev = usb_get_intfdata(intf); | |
1524 | usb_set_intfdata(intf, NULL); | |
1525 | if (!dev) | |
1526 | return; | |
1527 | ||
1528 | xdev = interface_to_usbdev (intf); | |
1529 | ||
a475f603 JP |
1530 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1531 | intf->dev.driver->name, | |
1532 | xdev->bus->bus_name, xdev->devpath, | |
1533 | dev->driver_info->description); | |
cb1cebbe | 1534 | |
1da177e4 LT |
1535 | net = dev->net; |
1536 | unregister_netdev (net); | |
1537 | ||
23f333a2 | 1538 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1539 | |
39707c2a HK |
1540 | usb_scuttle_anchored_urbs(&dev->deferred); |
1541 | ||
1da177e4 LT |
1542 | if (dev->driver_info->unbind) |
1543 | dev->driver_info->unbind (dev, intf); | |
1544 | ||
68972efa PS |
1545 | usb_kill_urb(dev->interrupt); |
1546 | usb_free_urb(dev->interrupt); | |
60e453a9 | 1547 | kfree(dev->padding_pkt); |
68972efa | 1548 | |
1da177e4 | 1549 | free_netdev(net); |
1da177e4 | 1550 | } |
38bde1d4 | 1551 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1552 | |
777baa47 SH |
1553 | static const struct net_device_ops usbnet_netdev_ops = { |
1554 | .ndo_open = usbnet_open, | |
1555 | .ndo_stop = usbnet_stop, | |
1556 | .ndo_start_xmit = usbnet_start_xmit, | |
1557 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1efed2d0 | 1558 | .ndo_set_rx_mode = usbnet_set_rx_mode, |
777baa47 SH |
1559 | .ndo_change_mtu = usbnet_change_mtu, |
1560 | .ndo_set_mac_address = eth_mac_addr, | |
1561 | .ndo_validate_addr = eth_validate_addr, | |
1562 | }; | |
1da177e4 LT |
1563 | |
1564 | /*-------------------------------------------------------------------------*/ | |
1565 | ||
1da177e4 LT |
1566 | // precondition: never called in_interrupt |
1567 | ||
225794f8 MH |
1568 | static struct device_type wlan_type = { |
1569 | .name = "wlan", | |
1570 | }; | |
1571 | ||
1572 | static struct device_type wwan_type = { | |
1573 | .name = "wwan", | |
1574 | }; | |
1575 | ||
38bde1d4 | 1576 | int |
1da177e4 LT |
1577 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1578 | { | |
1579 | struct usbnet *dev; | |
cb1cebbe | 1580 | struct net_device *net; |
1da177e4 LT |
1581 | struct usb_host_interface *interface; |
1582 | struct driver_info *info; | |
1583 | struct usb_device *xdev; | |
1584 | int status; | |
296c0242 | 1585 | const char *name; |
b0786b43 ML |
1586 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1587 | ||
1588 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1589 | * for usb interface, otherwise usb_autopm_get_interface may return | |
98f541c6 | 1590 | * failure if RUNTIME_PM is enabled. |
b0786b43 ML |
1591 | */ |
1592 | if (!driver->supports_autosuspend) { | |
1593 | driver->supports_autosuspend = 1; | |
1594 | pm_runtime_enable(&udev->dev); | |
1595 | } | |
1da177e4 | 1596 | |
296c0242 | 1597 | name = udev->dev.driver->name; |
1da177e4 LT |
1598 | info = (struct driver_info *) prod->driver_info; |
1599 | if (!info) { | |
296c0242 | 1600 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1601 | return -ENODEV; |
1602 | } | |
1603 | xdev = interface_to_usbdev (udev); | |
1604 | interface = udev->cur_altsetting; | |
1605 | ||
1da177e4 LT |
1606 | status = -ENOMEM; |
1607 | ||
1608 | // set up our own records | |
1609 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1610 | if (!net) |
1da177e4 | 1611 | goto out; |
1da177e4 | 1612 | |
0dacca73 BH |
1613 | /* netdev_printk() needs this so do it as early as possible */ |
1614 | SET_NETDEV_DEV(net, &udev->dev); | |
1615 | ||
1da177e4 LT |
1616 | dev = netdev_priv(net); |
1617 | dev->udev = xdev; | |
a11a6544 | 1618 | dev->intf = udev; |
1da177e4 | 1619 | dev->driver_info = info; |
296c0242 | 1620 | dev->driver_name = name; |
1da177e4 LT |
1621 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1622 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
14a0d635 | 1623 | init_waitqueue_head(&dev->wait); |
1da177e4 LT |
1624 | skb_queue_head_init (&dev->rxq); |
1625 | skb_queue_head_init (&dev->txq); | |
1626 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1627 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1628 | dev->bh.func = usbnet_bh; |
1629 | dev->bh.data = (unsigned long) dev; | |
11f17ef3 | 1630 | INIT_WORK (&dev->kevent, usbnet_deferred_kevent); |
69ee472f | 1631 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1632 | dev->delay.function = usbnet_bh; |
1633 | dev->delay.data = (unsigned long) dev; | |
1634 | init_timer (&dev->delay); | |
a9fc6338 | 1635 | mutex_init (&dev->phy_mutex); |
6eecdc5f DW |
1636 | mutex_init(&dev->interrupt_mutex); |
1637 | dev->interrupt_count = 0; | |
1da177e4 | 1638 | |
1da177e4 LT |
1639 | dev->net = net; |
1640 | strcpy (net->name, "usb%d"); | |
1641 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1642 | ||
2e55cc72 DB |
1643 | /* rx and tx sides can use different message sizes; |
1644 | * bind() should set rx_urb_size in that case. | |
1645 | */ | |
1646 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1647 | #if 0 |
1648 | // dma_supported() is deeply broken on almost all architectures | |
1649 | // possible with some EHCI controllers | |
6a35528a | 1650 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1651 | net->features |= NETIF_F_HIGHDMA; |
1652 | #endif | |
1653 | ||
777baa47 | 1654 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1655 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1656 | net->ethtool_ops = &usbnet_ethtool_ops; |
1657 | ||
1658 | // allow device-specific bind/init procedures | |
1659 | // NOTE net->name still not usable ... | |
1660 | if (info->bind) { | |
1661 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1662 | if (status < 0) |
1663 | goto out1; | |
1664 | ||
1da177e4 LT |
1665 | // heuristic: "usb%d" for links we know are two-host, |
1666 | // else "eth%d" when there's reasonable doubt. userspace | |
1667 | // can rename the link if it knows better. | |
8e95a202 | 1668 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1669 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1670 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1671 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1672 | /* WLAN devices should always be named "wlan%d" */ |
1673 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1674 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1675 | /* WWAN devices should always be named "wwan%d" */ |
1676 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1677 | strcpy(net->name, "wwan%d"); | |
f29fc259 | 1678 | |
6509141f WS |
1679 | /* devices that cannot do ARP */ |
1680 | if ((dev->driver_info->flags & FLAG_NOARP) != 0) | |
1681 | net->flags |= IFF_NOARP; | |
1682 | ||
f29fc259 DB |
1683 | /* maybe the remote can't receive an Ethernet MTU */ |
1684 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1685 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1686 | } else if (!info->in || !info->out) |
1687 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1688 | else { |
1689 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1690 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1691 | if (!(info->flags & FLAG_NO_SETINT)) | |
1692 | status = usb_set_interface (xdev, | |
1693 | interface->desc.bInterfaceNumber, | |
1694 | interface->desc.bAlternateSetting); | |
1695 | else | |
1696 | status = 0; | |
1697 | ||
1698 | } | |
9514bfe5 | 1699 | if (status >= 0 && dev->status) |
1da177e4 LT |
1700 | status = init_status (dev, udev); |
1701 | if (status < 0) | |
cb1cebbe | 1702 | goto out3; |
1da177e4 | 1703 | |
2e55cc72 DB |
1704 | if (!dev->rx_urb_size) |
1705 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1706 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1707 | |
eef23b53 BM |
1708 | /* let userspace know we have a random address */ |
1709 | if (ether_addr_equal(net->dev_addr, node_id)) | |
1710 | net->addr_assign_type = NET_ADDR_RANDOM; | |
1711 | ||
225794f8 MH |
1712 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1713 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1714 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1715 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1716 | ||
a88c32ae ML |
1717 | /* initialize max rx_qlen and tx_qlen */ |
1718 | usbnet_update_max_qlen(dev); | |
1719 | ||
60e453a9 ML |
1720 | if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) && |
1721 | !(info->flags & FLAG_MULTI_PACKET)) { | |
1722 | dev->padding_pkt = kzalloc(1, GFP_KERNEL); | |
09b69024 WY |
1723 | if (!dev->padding_pkt) { |
1724 | status = -ENOMEM; | |
60e453a9 | 1725 | goto out4; |
09b69024 | 1726 | } |
60e453a9 ML |
1727 | } |
1728 | ||
1da177e4 LT |
1729 | status = register_netdev (net); |
1730 | if (status) | |
60e453a9 | 1731 | goto out5; |
a475f603 JP |
1732 | netif_info(dev, probe, dev->net, |
1733 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1734 | udev->dev.driver->name, | |
1735 | xdev->bus->bus_name, xdev->devpath, | |
1736 | dev->driver_info->description, | |
1737 | net->dev_addr); | |
1da177e4 LT |
1738 | |
1739 | // ok, it's ready to go. | |
1740 | usb_set_intfdata (udev, dev); | |
1741 | ||
1da177e4 LT |
1742 | netif_device_attach (net); |
1743 | ||
37e8273c | 1744 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
0162c554 | 1745 | usbnet_link_change(dev, 0, 0); |
37e8273c | 1746 | |
1da177e4 LT |
1747 | return 0; |
1748 | ||
60e453a9 ML |
1749 | out5: |
1750 | kfree(dev->padding_pkt); | |
a4723848 | 1751 | out4: |
1752 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1753 | out3: |
1754 | if (info->unbind) | |
1755 | info->unbind (dev, udev); | |
1756 | out1: | |
1757 | free_netdev(net); | |
1758 | out: | |
1da177e4 LT |
1759 | return status; |
1760 | } | |
38bde1d4 | 1761 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1762 | |
1763 | /*-------------------------------------------------------------------------*/ | |
1764 | ||
36433127 ON |
1765 | /* |
1766 | * suspend the whole driver as soon as the first interface is suspended | |
1767 | * resume only when the last interface is resumed | |
38bde1d4 | 1768 | */ |
1da177e4 | 1769 | |
38bde1d4 | 1770 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1771 | { |
1772 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1773 | |
36433127 | 1774 | if (!dev->suspend_count++) { |
69ee472f ON |
1775 | spin_lock_irq(&dev->txq.lock); |
1776 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1777 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1778 | dev->suspend_count--; |
69ee472f ON |
1779 | spin_unlock_irq(&dev->txq.lock); |
1780 | return -EBUSY; | |
1781 | } else { | |
1782 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1783 | spin_unlock_irq(&dev->txq.lock); | |
1784 | } | |
a11a6544 ON |
1785 | /* |
1786 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1787 | * having everything error out. |
1788 | */ | |
1789 | netif_device_detach (dev->net); | |
69ee472f | 1790 | usbnet_terminate_urbs(dev); |
6eecdc5f | 1791 | __usbnet_status_stop_force(dev); |
69ee472f | 1792 | |
a11a6544 ON |
1793 | /* |
1794 | * reattach so runtime management can use and | |
1795 | * wake the device | |
1796 | */ | |
1797 | netif_device_attach (dev->net); | |
36433127 | 1798 | } |
1da177e4 LT |
1799 | return 0; |
1800 | } | |
38bde1d4 | 1801 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1802 | |
38bde1d4 | 1803 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1804 | { |
1805 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1806 | struct sk_buff *skb; |
1807 | struct urb *res; | |
1808 | int retval; | |
1809 | ||
1810 | if (!--dev->suspend_count) { | |
6eecdc5f DW |
1811 | /* resume interrupt URB if it was previously submitted */ |
1812 | __usbnet_status_start_force(dev, GFP_NOIO); | |
68972efa | 1813 | |
69ee472f ON |
1814 | spin_lock_irq(&dev->txq.lock); |
1815 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1816 | ||
69ee472f ON |
1817 | skb = (struct sk_buff *)res->context; |
1818 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1819 | if (retval < 0) { | |
1820 | dev_kfree_skb_any(skb); | |
638c5115 | 1821 | kfree(res->sg); |
69ee472f ON |
1822 | usb_free_urb(res); |
1823 | usb_autopm_put_interface_async(dev->intf); | |
1824 | } else { | |
1825 | dev->net->trans_start = jiffies; | |
1826 | __skb_queue_tail(&dev->txq, skb); | |
1827 | } | |
1828 | } | |
1da177e4 | 1829 | |
69ee472f ON |
1830 | smp_mb(); |
1831 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1832 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1833 | |
1834 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
14a0d635 ON |
1835 | /* handle remote wakeup ASAP |
1836 | * we cannot race against stop | |
1837 | */ | |
1838 | if (netif_device_present(dev->net) && | |
65841fd5 ML |
1839 | !timer_pending(&dev->delay) && |
1840 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1841 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1842 | |
75bd0cbd | 1843 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1844 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1845 | tasklet_schedule (&dev->bh); |
1846 | } | |
69ee472f | 1847 | } |
5d9d01a3 ON |
1848 | |
1849 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1850 | usb_autopm_get_interface_no_resume(intf); | |
1851 | ||
1da177e4 LT |
1852 | return 0; |
1853 | } | |
38bde1d4 | 1854 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1855 | |
5d9d01a3 ON |
1856 | /* |
1857 | * Either a subdriver implements manage_power, then it is assumed to always | |
1858 | * be ready to be suspended or it reports the readiness to be suspended | |
1859 | * explicitly | |
1860 | */ | |
1861 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1862 | { | |
1863 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1864 | dev->intf->needs_remote_wakeup = 1; | |
1865 | usb_autopm_put_interface_async(dev->intf); | |
1866 | } | |
1867 | } | |
1868 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1869 | |
2dd7c8cf ON |
1870 | /* |
1871 | * For devices that can do without special commands | |
1872 | */ | |
1873 | int usbnet_manage_power(struct usbnet *dev, int on) | |
1874 | { | |
1875 | dev->intf->needs_remote_wakeup = on; | |
1876 | return 0; | |
1877 | } | |
1878 | EXPORT_SYMBOL(usbnet_manage_power); | |
1879 | ||
ac64995d ML |
1880 | void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset) |
1881 | { | |
1882 | /* update link after link is reseted */ | |
1883 | if (link && !need_reset) | |
1884 | netif_carrier_on(dev->net); | |
1885 | else | |
1886 | netif_carrier_off(dev->net); | |
1887 | ||
1888 | if (need_reset && link) | |
1889 | usbnet_defer_kevent(dev, EVENT_LINK_RESET); | |
4b49f58f ML |
1890 | else |
1891 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); | |
ac64995d ML |
1892 | } |
1893 | EXPORT_SYMBOL(usbnet_link_change); | |
1894 | ||
877bd862 | 1895 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1896 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1897 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1898 | { |
1899 | void *buf = NULL; | |
1900 | int err = -ENOMEM; | |
1901 | ||
1902 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1903 | " value=0x%04x index=0x%04x size=%d\n", | |
1904 | cmd, reqtype, value, index, size); | |
1905 | ||
1906 | if (data) { | |
1907 | buf = kmalloc(size, GFP_KERNEL); | |
1908 | if (!buf) | |
1909 | goto out; | |
1910 | } | |
1911 | ||
1912 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1913 | cmd, reqtype, value, index, buf, size, | |
1914 | USB_CTRL_GET_TIMEOUT); | |
1915 | if (err > 0 && err <= size) | |
1916 | memcpy(data, buf, err); | |
1917 | kfree(buf); | |
1918 | out: | |
1919 | return err; | |
1920 | } | |
877bd862 | 1921 | |
0547fad2 ML |
1922 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1923 | u16 value, u16 index, const void *data, | |
1924 | u16 size) | |
877bd862 ML |
1925 | { |
1926 | void *buf = NULL; | |
1927 | int err = -ENOMEM; | |
1928 | ||
1929 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1930 | " value=0x%04x index=0x%04x size=%d\n", | |
1931 | cmd, reqtype, value, index, size); | |
1932 | ||
1933 | if (data) { | |
1934 | buf = kmemdup(data, size, GFP_KERNEL); | |
1935 | if (!buf) | |
1936 | goto out; | |
1937 | } | |
1938 | ||
1939 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1940 | cmd, reqtype, value, index, buf, size, | |
1941 | USB_CTRL_SET_TIMEOUT); | |
1942 | kfree(buf); | |
1943 | ||
1944 | out: | |
1945 | return err; | |
1946 | } | |
0547fad2 ML |
1947 | |
1948 | /* | |
1949 | * The function can't be called inside suspend/resume callback, | |
1950 | * otherwise deadlock will be caused. | |
1951 | */ | |
1952 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1953 | u16 value, u16 index, void *data, u16 size) | |
1954 | { | |
6f0a0986 ML |
1955 | int ret; |
1956 | ||
1957 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1958 | return -ENODEV; | |
1959 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1960 | data, size); | |
1961 | usb_autopm_put_interface(dev->intf); | |
1962 | return ret; | |
0547fad2 ML |
1963 | } |
1964 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
1965 | ||
1966 | /* | |
1967 | * The function can't be called inside suspend/resume callback, | |
1968 | * otherwise deadlock will be caused. | |
1969 | */ | |
1970 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1971 | u16 value, u16 index, const void *data, u16 size) | |
1972 | { | |
6f0a0986 ML |
1973 | int ret; |
1974 | ||
1975 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1976 | return -ENODEV; | |
1977 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1978 | data, size); | |
1979 | usb_autopm_put_interface(dev->intf); | |
1980 | return ret; | |
0547fad2 | 1981 | } |
877bd862 ML |
1982 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
1983 | ||
0547fad2 ML |
1984 | /* |
1985 | * The function can be called inside suspend/resume callback safely | |
1986 | * and should only be called by suspend/resume callback generally. | |
1987 | */ | |
1988 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1989 | u16 value, u16 index, void *data, u16 size) | |
1990 | { | |
1991 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1992 | data, size); | |
1993 | } | |
1994 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
1995 | ||
1996 | /* | |
1997 | * The function can be called inside suspend/resume callback safely | |
1998 | * and should only be called by suspend/resume callback generally. | |
1999 | */ | |
2000 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2001 | u16 value, u16 index, const void *data, | |
2002 | u16 size) | |
2003 | { | |
2004 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
2005 | data, size); | |
2006 | } | |
2007 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
2008 | ||
877bd862 ML |
2009 | static void usbnet_async_cmd_cb(struct urb *urb) |
2010 | { | |
2011 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
2012 | int status = urb->status; | |
2013 | ||
2014 | if (status < 0) | |
2015 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
2016 | __func__, status); | |
2017 | ||
2018 | kfree(req); | |
2019 | usb_free_urb(urb); | |
2020 | } | |
2021 | ||
0547fad2 ML |
2022 | /* |
2023 | * The caller must make sure that device can't be put into suspend | |
2024 | * state until the control URB completes. | |
2025 | */ | |
877bd862 ML |
2026 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
2027 | u16 value, u16 index, const void *data, u16 size) | |
2028 | { | |
2029 | struct usb_ctrlrequest *req = NULL; | |
2030 | struct urb *urb; | |
2031 | int err = -ENOMEM; | |
2032 | void *buf = NULL; | |
2033 | ||
2034 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
2035 | " value=0x%04x index=0x%04x size=%d\n", | |
2036 | cmd, reqtype, value, index, size); | |
2037 | ||
2038 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
2039 | if (!urb) { | |
2040 | netdev_err(dev->net, "Error allocating URB in" | |
2041 | " %s!\n", __func__); | |
2042 | goto fail; | |
2043 | } | |
2044 | ||
2045 | if (data) { | |
2046 | buf = kmemdup(data, size, GFP_ATOMIC); | |
2047 | if (!buf) { | |
2048 | netdev_err(dev->net, "Error allocating buffer" | |
2049 | " in %s!\n", __func__); | |
2050 | goto fail_free; | |
2051 | } | |
2052 | } | |
2053 | ||
2054 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
38673c82 | 2055 | if (!req) |
877bd862 | 2056 | goto fail_free_buf; |
877bd862 ML |
2057 | |
2058 | req->bRequestType = reqtype; | |
2059 | req->bRequest = cmd; | |
2060 | req->wValue = cpu_to_le16(value); | |
2061 | req->wIndex = cpu_to_le16(index); | |
2062 | req->wLength = cpu_to_le16(size); | |
2063 | ||
2064 | usb_fill_control_urb(urb, dev->udev, | |
2065 | usb_sndctrlpipe(dev->udev, 0), | |
2066 | (void *)req, buf, size, | |
2067 | usbnet_async_cmd_cb, req); | |
2068 | urb->transfer_flags |= URB_FREE_BUFFER; | |
2069 | ||
2070 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
2071 | if (err < 0) { | |
2072 | netdev_err(dev->net, "Error submitting the control" | |
2073 | " message: status=%d\n", err); | |
2074 | goto fail_free; | |
2075 | } | |
2076 | return 0; | |
2077 | ||
2078 | fail_free_buf: | |
2079 | kfree(buf); | |
2080 | fail_free: | |
2081 | kfree(req); | |
2082 | usb_free_urb(urb); | |
2083 | fail: | |
2084 | return err; | |
2085 | ||
2086 | } | |
2087 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
2088 | /*-------------------------------------------------------------------------*/ |
2089 | ||
f29fc259 | 2090 | static int __init usbnet_init(void) |
1da177e4 | 2091 | { |
c582a950 TF |
2092 | /* Compiler should optimize this out. */ |
2093 | BUILD_BUG_ON( | |
2094 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 2095 | |
c7e12ead | 2096 | eth_random_addr(node_id); |
cb1cebbe | 2097 | return 0; |
1da177e4 | 2098 | } |
f29fc259 | 2099 | module_init(usbnet_init); |
1da177e4 | 2100 | |
f29fc259 | 2101 | static void __exit usbnet_exit(void) |
1da177e4 | 2102 | { |
1da177e4 | 2103 | } |
f29fc259 | 2104 | module_exit(usbnet_exit); |
1da177e4 | 2105 | |
f29fc259 | 2106 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 2107 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 2108 | MODULE_LICENSE("GPL"); |