Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
090ffa9d | 2 | * USB Network driver infrastructure |
f29fc259 | 3 | * Copyright (C) 2000-2005 by David Brownell |
1da177e4 | 4 | * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | /* | |
22 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
23 | * kinds of full and high speed networking devices: host-to-host cables, |
24 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 25 | * |
090ffa9d DB |
26 | * These devices usually differ in terms of control protocols (if they |
27 | * even have one!) and sometimes they define new framing to wrap or batch | |
28 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
29 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
30 | * issues can usefully be addressed by this framework. | |
31 | */ | |
1da177e4 LT |
32 | |
33 | // #define DEBUG // error path messages, extra info | |
34 | // #define VERBOSE // more; success messages | |
35 | ||
1da177e4 | 36 | #include <linux/module.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/etherdevice.h> | |
03ad032b | 40 | #include <linux/ctype.h> |
1da177e4 LT |
41 | #include <linux/ethtool.h> |
42 | #include <linux/workqueue.h> | |
43 | #include <linux/mii.h> | |
1da177e4 | 44 | #include <linux/usb.h> |
3692e94f | 45 | #include <linux/usb/usbnet.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
fd1f170d | 47 | #include <linux/kernel.h> |
b0786b43 | 48 | #include <linux/pm_runtime.h> |
f29fc259 DB |
49 | |
50 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
51 | |
52 | ||
53 | /*-------------------------------------------------------------------------*/ | |
54 | ||
55 | /* | |
56 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
57 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
58 | * One maximum size Ethernet packet takes twenty four of them. | |
59 | * For high speed, each frame comfortably fits almost 36 max size | |
60 | * Ethernet packets (so queues should be bigger). | |
f29fc259 | 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 | ||
73 | // throttle rx/tx briefly after some faults, so khubd might disconnect() | |
74 | // us (it polls at HZ/4 usually) before we report too many false errors. | |
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 | { | |
163 | int tmp, i; | |
164 | unsigned char buf [13]; | |
165 | ||
166 | tmp = usb_string(dev->udev, iMACAddress, buf, sizeof buf); | |
167 | if (tmp != 12) { | |
168 | dev_dbg(&dev->udev->dev, | |
169 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
170 | if (tmp >= 0) | |
171 | tmp = -EINVAL; | |
172 | return tmp; | |
173 | } | |
174 | for (i = tmp = 0; i < 6; i++, tmp += 2) | |
175 | dev->net->dev_addr [i] = | |
fd1f170d | 176 | (hex_to_bin(buf[tmp]) << 4) + hex_to_bin(buf[tmp + 1]); |
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 | ||
207 | if (!netif_running (dev->net)) | |
208 | return; | |
209 | ||
24ead299 | 210 | status = usb_submit_urb (urb, GFP_ATOMIC); |
211 | if (status != 0) | |
212 | netif_err(dev, timer, dev->net, | |
213 | "intr resubmit --> %d\n", status); | |
214 | } | |
1da177e4 LT |
215 | |
216 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
217 | { | |
218 | char *buf = NULL; | |
219 | unsigned pipe = 0; | |
220 | unsigned maxp; | |
221 | unsigned period; | |
222 | ||
223 | if (!dev->driver_info->status) | |
224 | return 0; | |
225 | ||
226 | pipe = usb_rcvintpipe (dev->udev, | |
227 | dev->status->desc.bEndpointAddress | |
228 | & USB_ENDPOINT_NUMBER_MASK); | |
229 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
230 | ||
231 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
232 | period = max ((int) dev->status->desc.bInterval, | |
233 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
234 | ||
e94b1766 | 235 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 236 | if (buf) { |
e94b1766 | 237 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
238 | if (!dev->interrupt) { |
239 | kfree (buf); | |
240 | return -ENOMEM; | |
241 | } else { | |
242 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
243 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 244 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
245 | dev_dbg(&intf->dev, |
246 | "status ep%din, %d bytes period %d\n", | |
247 | usb_pipeendpoint(pipe), maxp, period); | |
248 | } | |
249 | } | |
18ab458f | 250 | return 0; |
1da177e4 LT |
251 | } |
252 | ||
6eecdc5f DW |
253 | /* Submit the interrupt URB if not previously submitted, increasing refcount */ |
254 | int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags) | |
255 | { | |
256 | int ret = 0; | |
257 | ||
258 | WARN_ON_ONCE(dev->interrupt == NULL); | |
259 | if (dev->interrupt) { | |
260 | mutex_lock(&dev->interrupt_mutex); | |
261 | ||
262 | if (++dev->interrupt_count == 1) | |
263 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
264 | ||
265 | dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n", | |
266 | dev->interrupt_count); | |
267 | mutex_unlock(&dev->interrupt_mutex); | |
268 | } | |
269 | return ret; | |
270 | } | |
271 | EXPORT_SYMBOL_GPL(usbnet_status_start); | |
272 | ||
273 | /* For resume; submit interrupt URB if previously submitted */ | |
274 | static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags) | |
275 | { | |
276 | int ret = 0; | |
277 | ||
278 | mutex_lock(&dev->interrupt_mutex); | |
279 | if (dev->interrupt_count) { | |
280 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
281 | dev_dbg(&dev->udev->dev, | |
282 | "submitted interrupt URB for resume\n"); | |
283 | } | |
284 | mutex_unlock(&dev->interrupt_mutex); | |
285 | return ret; | |
286 | } | |
287 | ||
288 | /* Kill the interrupt URB if all submitters want it killed */ | |
289 | void usbnet_status_stop(struct usbnet *dev) | |
290 | { | |
291 | if (dev->interrupt) { | |
292 | mutex_lock(&dev->interrupt_mutex); | |
293 | WARN_ON(dev->interrupt_count == 0); | |
294 | ||
295 | if (dev->interrupt_count && --dev->interrupt_count == 0) | |
296 | usb_kill_urb(dev->interrupt); | |
297 | ||
298 | dev_dbg(&dev->udev->dev, | |
299 | "decremented interrupt URB count to %d\n", | |
300 | dev->interrupt_count); | |
301 | mutex_unlock(&dev->interrupt_mutex); | |
302 | } | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(usbnet_status_stop); | |
305 | ||
306 | /* For suspend; always kill interrupt URB */ | |
307 | static void __usbnet_status_stop_force(struct usbnet *dev) | |
308 | { | |
309 | if (dev->interrupt) { | |
310 | mutex_lock(&dev->interrupt_mutex); | |
311 | usb_kill_urb(dev->interrupt); | |
312 | dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n"); | |
313 | mutex_unlock(&dev->interrupt_mutex); | |
314 | } | |
315 | } | |
316 | ||
2e55cc72 DB |
317 | /* Passes this packet up the stack, updating its accounting. |
318 | * Some link protocols batch packets, so their rx_fixup paths | |
319 | * can return clones as well as just modify the original skb. | |
320 | */ | |
321 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
322 | { |
323 | int status; | |
324 | ||
7834ddbc JK |
325 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
326 | skb_queue_tail(&dev->rxq_pause, skb); | |
327 | return; | |
328 | } | |
329 | ||
1da177e4 | 330 | skb->protocol = eth_type_trans (skb, dev->net); |
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 DM |
434 | __skb_unlink(skb, list); |
435 | spin_unlock(&list->lock); | |
436 | spin_lock(&dev->done.lock); | |
437 | __skb_queue_tail(&dev->done, skb); | |
1da177e4 | 438 | if (dev->done.qlen == 1) |
8728b834 DM |
439 | tasklet_schedule(&dev->bh); |
440 | spin_unlock_irqrestore(&dev->done.lock, flags); | |
5b6e9bcd | 441 | return old_state; |
1da177e4 LT |
442 | } |
443 | ||
444 | /* some work can't be done in tasklets, so we use keventd | |
445 | * | |
446 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
447 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
448 | */ | |
2e55cc72 | 449 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
450 | { |
451 | set_bit (work, &dev->flags); | |
9532021d SG |
452 | if (!schedule_work (&dev->kevent)) { |
453 | if (net_ratelimit()) | |
454 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
455 | } else { | |
60b86755 | 456 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 457 | } |
1da177e4 | 458 | } |
2e55cc72 | 459 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
460 | |
461 | /*-------------------------------------------------------------------------*/ | |
462 | ||
7d12e780 | 463 | static void rx_complete (struct urb *urb); |
1da177e4 | 464 | |
dacb3975 | 465 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
466 | { |
467 | struct sk_buff *skb; | |
468 | struct skb_data *entry; | |
469 | int retval = 0; | |
470 | unsigned long lockflags; | |
2e55cc72 | 471 | size_t size = dev->rx_urb_size; |
1da177e4 | 472 | |
70c37bf9 BM |
473 | /* prevent rx skb allocation when error ratio is high */ |
474 | if (test_bit(EVENT_RX_KILL, &dev->flags)) { | |
475 | usb_free_urb(urb); | |
476 | return -ENOLINK; | |
477 | } | |
478 | ||
7bdd4027 ED |
479 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
480 | if (!skb) { | |
a475f603 | 481 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 482 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 483 | usb_free_urb (urb); |
dacb3975 | 484 | return -ENOMEM; |
1da177e4 | 485 | } |
1da177e4 LT |
486 | |
487 | entry = (struct skb_data *) skb->cb; | |
488 | entry->urb = urb; | |
489 | entry->dev = dev; | |
1da177e4 LT |
490 | entry->length = 0; |
491 | ||
492 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
493 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
494 | |
495 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
496 | ||
8e95a202 JP |
497 | if (netif_running (dev->net) && |
498 | netif_device_present (dev->net) && | |
69ee472f ON |
499 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
500 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 501 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 502 | case -EPIPE: |
2e55cc72 | 503 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
504 | break; |
505 | case -ENOMEM: | |
2e55cc72 | 506 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
507 | break; |
508 | case -ENODEV: | |
a475f603 | 509 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
510 | netif_device_detach (dev->net); |
511 | break; | |
dacb3975 DM |
512 | case -EHOSTUNREACH: |
513 | retval = -ENOLINK; | |
514 | break; | |
1da177e4 | 515 | default: |
a475f603 JP |
516 | netif_dbg(dev, rx_err, dev->net, |
517 | "rx submit, %d\n", retval); | |
1da177e4 LT |
518 | tasklet_schedule (&dev->bh); |
519 | break; | |
520 | case 0: | |
5b6e9bcd | 521 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
522 | } |
523 | } else { | |
a475f603 | 524 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
525 | retval = -ENOLINK; |
526 | } | |
527 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
528 | if (retval) { | |
529 | dev_kfree_skb_any (skb); | |
530 | usb_free_urb (urb); | |
531 | } | |
dacb3975 | 532 | return retval; |
1da177e4 LT |
533 | } |
534 | ||
535 | ||
536 | /*-------------------------------------------------------------------------*/ | |
537 | ||
538 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
539 | { | |
8e95a202 | 540 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
541 | !dev->driver_info->rx_fixup (dev, skb)) { |
542 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
543 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
544 | dev->net->stats.rx_errors++; | |
545 | goto done; | |
546 | } | |
1da177e4 LT |
547 | // else network stack removes extra byte if we forced a short packet |
548 | ||
073285fd AO |
549 | if (skb->len) { |
550 | /* all data was already cloned from skb inside the driver */ | |
551 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
552 | dev_kfree_skb_any(skb); | |
553 | else | |
554 | usbnet_skb_return(dev, skb); | |
555 | return; | |
1da177e4 | 556 | } |
073285fd AO |
557 | |
558 | netif_dbg(dev, rx_err, dev->net, "drop\n"); | |
073285fd | 559 | dev->net->stats.rx_errors++; |
7a635ea9 | 560 | done: |
073285fd | 561 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
562 | } |
563 | ||
564 | /*-------------------------------------------------------------------------*/ | |
565 | ||
7d12e780 | 566 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
567 | { |
568 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
569 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
570 | struct usbnet *dev = entry->dev; | |
571 | int urb_status = urb->status; | |
5b6e9bcd | 572 | enum skb_state state; |
1da177e4 LT |
573 | |
574 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 575 | state = rx_done; |
1da177e4 LT |
576 | entry->urb = NULL; |
577 | ||
578 | switch (urb_status) { | |
18ab458f DB |
579 | /* success */ |
580 | case 0: | |
f29fc259 | 581 | if (skb->len < dev->net->hard_header_len) { |
5b6e9bcd | 582 | state = rx_cleanup; |
7963837f HX |
583 | dev->net->stats.rx_errors++; |
584 | dev->net->stats.rx_length_errors++; | |
a475f603 JP |
585 | netif_dbg(dev, rx_err, dev->net, |
586 | "rx length %d\n", skb->len); | |
1da177e4 LT |
587 | } |
588 | break; | |
589 | ||
18ab458f DB |
590 | /* stalls need manual reset. this is rare ... except that |
591 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 592 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
593 | * storm, recovering as needed. |
594 | */ | |
595 | case -EPIPE: | |
7963837f | 596 | dev->net->stats.rx_errors++; |
2e55cc72 | 597 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
598 | // FALLTHROUGH |
599 | ||
18ab458f DB |
600 | /* software-driven interface shutdown */ |
601 | case -ECONNRESET: /* async unlink */ | |
602 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
603 | netif_dbg(dev, ifdown, dev->net, |
604 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
605 | goto block; |
606 | ||
18ab458f DB |
607 | /* we get controller i/o faults during khubd disconnect() delays. |
608 | * throttle down resubmits, to avoid log floods; just temporarily, | |
609 | * so we still recover when the fault isn't a khubd delay. | |
610 | */ | |
611 | case -EPROTO: | |
612 | case -ETIME: | |
613 | case -EILSEQ: | |
7963837f | 614 | dev->net->stats.rx_errors++; |
1da177e4 LT |
615 | if (!timer_pending (&dev->delay)) { |
616 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
617 | netif_dbg(dev, link, dev->net, |
618 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
619 | } |
620 | block: | |
5b6e9bcd | 621 | state = rx_cleanup; |
1da177e4 LT |
622 | entry->urb = urb; |
623 | urb = NULL; | |
624 | break; | |
625 | ||
18ab458f DB |
626 | /* data overrun ... flush fifo? */ |
627 | case -EOVERFLOW: | |
7963837f | 628 | dev->net->stats.rx_over_errors++; |
1da177e4 | 629 | // FALLTHROUGH |
cb1cebbe | 630 | |
18ab458f | 631 | default: |
5b6e9bcd | 632 | state = rx_cleanup; |
7963837f | 633 | dev->net->stats.rx_errors++; |
a475f603 | 634 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
635 | break; |
636 | } | |
637 | ||
70c37bf9 BM |
638 | /* stop rx if packet error rate is high */ |
639 | if (++dev->pkt_cnt > 30) { | |
640 | dev->pkt_cnt = 0; | |
641 | dev->pkt_err = 0; | |
642 | } else { | |
643 | if (state == rx_cleanup) | |
644 | dev->pkt_err++; | |
645 | if (dev->pkt_err > 20) | |
646 | set_bit(EVENT_RX_KILL, &dev->flags); | |
647 | } | |
648 | ||
5b6e9bcd | 649 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
650 | |
651 | if (urb) { | |
8e95a202 | 652 | if (netif_running (dev->net) && |
5b6e9bcd ML |
653 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
654 | state != unlink_start) { | |
1da177e4 | 655 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 656 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
657 | return; |
658 | } | |
659 | usb_free_urb (urb); | |
660 | } | |
a475f603 | 661 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
662 | } |
663 | ||
7834ddbc JK |
664 | /*-------------------------------------------------------------------------*/ |
665 | void usbnet_pause_rx(struct usbnet *dev) | |
666 | { | |
667 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
668 | ||
a475f603 | 669 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
670 | } |
671 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
672 | ||
673 | void usbnet_resume_rx(struct usbnet *dev) | |
674 | { | |
675 | struct sk_buff *skb; | |
676 | int num = 0; | |
677 | ||
678 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
679 | ||
680 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
681 | usbnet_skb_return(dev, skb); | |
682 | num++; | |
683 | } | |
684 | ||
685 | tasklet_schedule(&dev->bh); | |
686 | ||
a475f603 JP |
687 | netif_dbg(dev, rx_status, dev->net, |
688 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
689 | } |
690 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
691 | ||
692 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
693 | { | |
694 | skb_queue_purge(&dev->rxq_pause); | |
695 | } | |
696 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
697 | ||
1da177e4 LT |
698 | /*-------------------------------------------------------------------------*/ |
699 | ||
700 | // unlink pending rx/tx; completion handlers do all other cleanup | |
701 | ||
702 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
703 | { | |
704 | unsigned long flags; | |
5b6e9bcd | 705 | struct sk_buff *skb; |
1da177e4 LT |
706 | int count = 0; |
707 | ||
708 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 709 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
710 | struct skb_data *entry; |
711 | struct urb *urb; | |
712 | int retval; | |
713 | ||
5b6e9bcd ML |
714 | skb_queue_walk(q, skb) { |
715 | entry = (struct skb_data *) skb->cb; | |
716 | if (entry->state != unlink_start) | |
717 | goto found; | |
718 | } | |
719 | break; | |
720 | found: | |
721 | entry->state = unlink_start; | |
1da177e4 | 722 | urb = entry->urb; |
1da177e4 | 723 | |
0956a8c2 | 724 | /* |
725 | * Get reference count of the URB to avoid it to be | |
726 | * freed during usb_unlink_urb, which may trigger | |
727 | * use-after-free problem inside usb_unlink_urb since | |
728 | * usb_unlink_urb is always racing with .complete | |
729 | * handler(include defer_bh). | |
730 | */ | |
731 | usb_get_urb(urb); | |
4231d47e | 732 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
733 | // during some PM-driven resume scenarios, |
734 | // these (async) unlinks complete immediately | |
735 | retval = usb_unlink_urb (urb); | |
736 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 737 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
738 | else |
739 | count++; | |
0956a8c2 | 740 | usb_put_urb(urb); |
4231d47e | 741 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
742 | } |
743 | spin_unlock_irqrestore (&q->lock, flags); | |
744 | return count; | |
745 | } | |
746 | ||
a99c1949 JP |
747 | // Flush all pending rx urbs |
748 | // minidrivers may need to do this when the MTU changes | |
749 | ||
750 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
751 | { | |
752 | if (netif_running(dev->net)) { | |
753 | (void) unlink_urbs (dev, &dev->rxq); | |
754 | tasklet_schedule(&dev->bh); | |
755 | } | |
756 | } | |
757 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
758 | |
759 | /*-------------------------------------------------------------------------*/ | |
760 | ||
761 | // precondition: never called in_interrupt | |
69ee472f ON |
762 | static void usbnet_terminate_urbs(struct usbnet *dev) |
763 | { | |
764 | DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); | |
765 | DECLARE_WAITQUEUE(wait, current); | |
766 | int temp; | |
767 | ||
768 | /* ensure there are no more active urbs */ | |
769 | add_wait_queue(&unlink_wakeup, &wait); | |
770 | set_current_state(TASK_UNINTERRUPTIBLE); | |
771 | dev->wait = &unlink_wakeup; | |
772 | temp = unlink_urbs(dev, &dev->txq) + | |
773 | unlink_urbs(dev, &dev->rxq); | |
774 | ||
775 | /* maybe wait for deletions to finish. */ | |
776 | while (!skb_queue_empty(&dev->rxq) | |
777 | && !skb_queue_empty(&dev->txq) | |
778 | && !skb_queue_empty(&dev->done)) { | |
66cc42a4 | 779 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); |
69ee472f | 780 | set_current_state(TASK_UNINTERRUPTIBLE); |
a475f603 JP |
781 | netif_dbg(dev, ifdown, dev->net, |
782 | "waited for %d urb completions\n", temp); | |
69ee472f ON |
783 | } |
784 | set_current_state(TASK_RUNNING); | |
785 | dev->wait = NULL; | |
786 | remove_wait_queue(&unlink_wakeup, &wait); | |
787 | } | |
1da177e4 | 788 | |
777baa47 | 789 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
790 | { |
791 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 792 | struct driver_info *info = dev->driver_info; |
a33e9e7f | 793 | int retval; |
1da177e4 | 794 | |
75bd0cbd | 795 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
796 | netif_stop_queue (net); |
797 | ||
a475f603 | 798 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 799 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
800 | net->stats.rx_packets, net->stats.tx_packets, |
801 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 802 | |
a33e9e7f JK |
803 | /* allow minidriver to stop correctly (wireless devices to turn off |
804 | * radio etc) */ | |
805 | if (info->stop) { | |
806 | retval = info->stop(dev); | |
a475f603 JP |
807 | if (retval < 0) |
808 | netif_info(dev, ifdown, dev->net, | |
809 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
810 | retval, | |
811 | dev->udev->bus->bus_name, dev->udev->devpath, | |
812 | info->description); | |
a33e9e7f JK |
813 | } |
814 | ||
69ee472f ON |
815 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
816 | usbnet_terminate_urbs(dev); | |
1da177e4 | 817 | |
6eecdc5f | 818 | usbnet_status_stop(dev); |
1da177e4 | 819 | |
7834ddbc JK |
820 | usbnet_purge_paused_rxq(dev); |
821 | ||
1da177e4 LT |
822 | /* deferred work (task, timer, softirq) must also stop. |
823 | * can't flush_scheduled_work() until we drop rtnl (later), | |
824 | * else workers could deadlock; so make workers a NOP. | |
825 | */ | |
826 | dev->flags = 0; | |
827 | del_timer_sync (&dev->delay); | |
828 | tasklet_kill (&dev->bh); | |
a1c088e0 ON |
829 | if (info->manage_power && |
830 | !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags)) | |
69ee472f ON |
831 | info->manage_power(dev, 0); |
832 | else | |
833 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
834 | |
835 | return 0; | |
836 | } | |
777baa47 | 837 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
838 | |
839 | /*-------------------------------------------------------------------------*/ | |
840 | ||
841 | // posts reads, and enables write queuing | |
842 | ||
843 | // precondition: never called in_interrupt | |
844 | ||
777baa47 | 845 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
846 | { |
847 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 848 | int retval; |
1da177e4 LT |
849 | struct driver_info *info = dev->driver_info; |
850 | ||
a11a6544 | 851 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
852 | netif_info(dev, ifup, dev->net, |
853 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
854 | retval, | |
855 | dev->udev->bus->bus_name, | |
856 | dev->udev->devpath, | |
857 | info->description); | |
a11a6544 ON |
858 | goto done_nopm; |
859 | } | |
860 | ||
1da177e4 LT |
861 | // put into "known safe" state |
862 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
863 | netif_info(dev, ifup, dev->net, |
864 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
865 | retval, | |
866 | dev->udev->bus->bus_name, | |
867 | dev->udev->devpath, | |
868 | info->description); | |
1da177e4 LT |
869 | goto done; |
870 | } | |
871 | ||
a88c32ae ML |
872 | /* hard_mtu or rx_urb_size may change in reset() */ |
873 | usbnet_update_max_qlen(dev); | |
874 | ||
1da177e4 LT |
875 | // insist peer be connected |
876 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 877 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
878 | goto done; |
879 | } | |
880 | ||
881 | /* start any status interrupt transfer */ | |
882 | if (dev->interrupt) { | |
6eecdc5f | 883 | retval = usbnet_status_start(dev, GFP_KERNEL); |
1da177e4 | 884 | if (retval < 0) { |
a475f603 JP |
885 | netif_err(dev, ifup, dev->net, |
886 | "intr submit %d\n", retval); | |
1da177e4 LT |
887 | goto done; |
888 | } | |
889 | } | |
890 | ||
68972efa | 891 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 892 | netif_start_queue (net); |
a475f603 JP |
893 | netif_info(dev, ifup, dev->net, |
894 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
895 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
896 | dev->net->mtu, | |
897 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
898 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
899 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
900 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
901 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
902 | "simple"); | |
1da177e4 | 903 | |
70c37bf9 BM |
904 | /* reset rx error state */ |
905 | dev->pkt_cnt = 0; | |
906 | dev->pkt_err = 0; | |
907 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
908 | ||
1da177e4 LT |
909 | // delay posting reads until we're fully open |
910 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
911 | if (info->manage_power) { |
912 | retval = info->manage_power(dev, 1); | |
a1c088e0 ON |
913 | if (retval < 0) { |
914 | retval = 0; | |
915 | set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); | |
916 | } else { | |
917 | usb_autopm_put_interface(dev->intf); | |
918 | } | |
69ee472f | 919 | } |
a11a6544 | 920 | return retval; |
1da177e4 | 921 | done: |
a11a6544 ON |
922 | usb_autopm_put_interface(dev->intf); |
923 | done_nopm: | |
1da177e4 LT |
924 | return retval; |
925 | } | |
777baa47 | 926 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
927 | |
928 | /*-------------------------------------------------------------------------*/ | |
929 | ||
2e55cc72 DB |
930 | /* ethtool methods; minidrivers may need to add some more, but |
931 | * they'll probably want to use this base set. | |
932 | */ | |
933 | ||
c41286fd AB |
934 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
935 | { | |
936 | struct usbnet *dev = netdev_priv(net); | |
937 | ||
938 | if (!dev->mii.mdio_read) | |
939 | return -EOPNOTSUPP; | |
940 | ||
941 | return mii_ethtool_gset(&dev->mii, cmd); | |
942 | } | |
943 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
944 | ||
945 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
946 | { | |
947 | struct usbnet *dev = netdev_priv(net); | |
948 | int retval; | |
949 | ||
950 | if (!dev->mii.mdio_write) | |
951 | return -EOPNOTSUPP; | |
952 | ||
953 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
954 | ||
955 | /* link speed/duplex might have changed */ | |
956 | if (dev->driver_info->link_reset) | |
957 | dev->driver_info->link_reset(dev); | |
958 | ||
a88c32ae ML |
959 | /* hard_mtu or rx_urb_size may change in link_reset() */ |
960 | usbnet_update_max_qlen(dev); | |
961 | ||
c41286fd AB |
962 | return retval; |
963 | ||
964 | } | |
965 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
966 | ||
c41286fd | 967 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
968 | { |
969 | struct usbnet *dev = netdev_priv(net); | |
970 | ||
f29fc259 | 971 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
972 | if (dev->driver_info->check_connect) |
973 | return dev->driver_info->check_connect (dev) == 0; | |
974 | ||
c41286fd AB |
975 | /* if the device has mii operations, use those */ |
976 | if (dev->mii.mdio_read) | |
977 | return mii_link_ok(&dev->mii); | |
978 | ||
05ffb3e2 BM |
979 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
980 | return ethtool_op_get_link(net); | |
1da177e4 | 981 | } |
c41286fd | 982 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 983 | |
18ee91fa | 984 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
985 | { |
986 | struct usbnet *dev = netdev_priv(net); | |
987 | ||
18ee91fa DB |
988 | if (!dev->mii.mdio_write) |
989 | return -EOPNOTSUPP; | |
990 | ||
991 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 992 | } |
18ee91fa | 993 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 994 | |
18ee91fa | 995 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
996 | { |
997 | struct usbnet *dev = netdev_priv(net); | |
998 | ||
86a2f415 PS |
999 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
1000 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
1001 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
1002 | sizeof info->fw_version); |
1003 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 1004 | } |
18ee91fa | 1005 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 1006 | |
18ee91fa | 1007 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
1008 | { |
1009 | struct usbnet *dev = netdev_priv(net); | |
1010 | ||
18ee91fa DB |
1011 | return dev->msg_enable; |
1012 | } | |
1013 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 1014 | |
18ee91fa DB |
1015 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
1016 | { | |
1017 | struct usbnet *dev = netdev_priv(net); | |
1018 | ||
1019 | dev->msg_enable = level; | |
c41286fd | 1020 | } |
18ee91fa | 1021 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 1022 | |
2e55cc72 | 1023 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 1024 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
1025 | .get_settings = usbnet_get_settings, |
1026 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 1027 | .get_link = usbnet_get_link, |
c41286fd | 1028 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 1029 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
1030 | .get_msglevel = usbnet_get_msglevel, |
1031 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 1032 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 1033 | }; |
1da177e4 LT |
1034 | |
1035 | /*-------------------------------------------------------------------------*/ | |
1036 | ||
4b49f58f ML |
1037 | static void __handle_link_change(struct usbnet *dev) |
1038 | { | |
1039 | if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1040 | return; | |
1041 | ||
1042 | if (!netif_carrier_ok(dev->net)) { | |
1043 | /* kill URBs for reading packets to save bus bandwidth */ | |
1044 | unlink_urbs(dev, &dev->rxq); | |
1045 | ||
1046 | /* | |
1047 | * tx_timeout will unlink URBs for sending packets and | |
1048 | * tx queue is stopped by netcore after link becomes off | |
1049 | */ | |
1050 | } else { | |
1051 | /* submitting URBs for reading packets */ | |
1052 | tasklet_schedule(&dev->bh); | |
1053 | } | |
1054 | ||
a88c32ae ML |
1055 | /* hard_mtu or rx_urb_size may change during link change */ |
1056 | usbnet_update_max_qlen(dev); | |
1057 | ||
4b49f58f ML |
1058 | clear_bit(EVENT_LINK_CHANGE, &dev->flags); |
1059 | } | |
1060 | ||
1da177e4 LT |
1061 | /* work that cannot be done in interrupt context uses keventd. |
1062 | * | |
1063 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
1064 | * especially now that control transfers can be queued. | |
1065 | */ | |
1066 | static void | |
c4028958 | 1067 | kevent (struct work_struct *work) |
1da177e4 | 1068 | { |
c4028958 DH |
1069 | struct usbnet *dev = |
1070 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
1071 | int status; |
1072 | ||
1073 | /* usb_clear_halt() needs a thread context */ | |
1074 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
1075 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
1076 | status = usb_autopm_get_interface(dev->intf); |
1077 | if (status < 0) | |
1078 | goto fail_pipe; | |
1da177e4 | 1079 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 1080 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1081 | if (status < 0 && |
1082 | status != -EPIPE && | |
1083 | status != -ESHUTDOWN) { | |
1da177e4 | 1084 | if (netif_msg_tx_err (dev)) |
69ee472f | 1085 | fail_pipe: |
60b86755 JP |
1086 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
1087 | status); | |
1da177e4 LT |
1088 | } else { |
1089 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
1090 | if (status != -ESHUTDOWN) |
1091 | netif_wake_queue (dev->net); | |
1da177e4 LT |
1092 | } |
1093 | } | |
1094 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1095 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
1096 | status = usb_autopm_get_interface(dev->intf); |
1097 | if (status < 0) | |
1098 | goto fail_halt; | |
1da177e4 | 1099 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 1100 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1101 | if (status < 0 && |
1102 | status != -EPIPE && | |
1103 | status != -ESHUTDOWN) { | |
1da177e4 | 1104 | if (netif_msg_rx_err (dev)) |
69ee472f | 1105 | fail_halt: |
60b86755 JP |
1106 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
1107 | status); | |
1da177e4 LT |
1108 | } else { |
1109 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
1110 | tasklet_schedule (&dev->bh); | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | /* tasklet could resubmit itself forever if memory is tight */ | |
1115 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
1116 | struct urb *urb = NULL; | |
dacb3975 | 1117 | int resched = 1; |
1da177e4 LT |
1118 | |
1119 | if (netif_running (dev->net)) | |
1120 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
1121 | else | |
1122 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
1123 | if (urb != NULL) { | |
1124 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 1125 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
1126 | if (status < 0) { |
1127 | usb_free_urb(urb); | |
69ee472f | 1128 | goto fail_lowmem; |
ab60707f | 1129 | } |
dacb3975 DM |
1130 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
1131 | resched = 0; | |
69ee472f ON |
1132 | usb_autopm_put_interface(dev->intf); |
1133 | fail_lowmem: | |
dacb3975 DM |
1134 | if (resched) |
1135 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
1136 | } |
1137 | } | |
1138 | ||
7ea13c9c | 1139 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 1140 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
1141 | int retval = 0; |
1142 | ||
1143 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1144 | status = usb_autopm_get_interface(dev->intf); |
1145 | if (status < 0) | |
1146 | goto skip_reset; | |
7ea13c9c | 1147 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1148 | usb_autopm_put_interface(dev->intf); |
1149 | skip_reset: | |
60b86755 JP |
1150 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1151 | retval, | |
1152 | dev->udev->bus->bus_name, | |
1153 | dev->udev->devpath, | |
1154 | info->description); | |
69ee472f ON |
1155 | } else { |
1156 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c | 1157 | } |
4b49f58f ML |
1158 | |
1159 | /* handle link change from link resetting */ | |
1160 | __handle_link_change(dev); | |
7ea13c9c DH |
1161 | } |
1162 | ||
4b49f58f ML |
1163 | if (test_bit (EVENT_LINK_CHANGE, &dev->flags)) |
1164 | __handle_link_change(dev); | |
1165 | ||
1da177e4 | 1166 | if (dev->flags) |
60b86755 | 1167 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | /*-------------------------------------------------------------------------*/ | |
1171 | ||
7d12e780 | 1172 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1173 | { |
1174 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1175 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1176 | struct usbnet *dev = entry->dev; | |
1177 | ||
1178 | if (urb->status == 0) { | |
073285fd AO |
1179 | if (!(dev->driver_info->flags & FLAG_MULTI_PACKET)) |
1180 | dev->net->stats.tx_packets++; | |
7963837f | 1181 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1182 | } else { |
7963837f | 1183 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1184 | |
1185 | switch (urb->status) { | |
1186 | case -EPIPE: | |
2e55cc72 | 1187 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1188 | break; |
1189 | ||
1190 | /* software-driven interface shutdown */ | |
1191 | case -ECONNRESET: // async unlink | |
1192 | case -ESHUTDOWN: // hardware gone | |
1193 | break; | |
1194 | ||
1195 | // like rx, tx gets controller i/o faults during khubd delays | |
1196 | // and so it uses the same throttling mechanism. | |
38e2bfc9 PZ |
1197 | case -EPROTO: |
1198 | case -ETIME: | |
1199 | case -EILSEQ: | |
69ee472f | 1200 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1201 | if (!timer_pending (&dev->delay)) { |
1202 | mod_timer (&dev->delay, | |
1203 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1204 | netif_dbg(dev, link, dev->net, |
1205 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1206 | } |
1207 | netif_stop_queue (dev->net); | |
1208 | break; | |
1209 | default: | |
a475f603 JP |
1210 | netif_dbg(dev, tx_err, dev->net, |
1211 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1212 | break; |
1213 | } | |
1214 | } | |
1215 | ||
69ee472f | 1216 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1217 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1218 | } |
1219 | ||
1220 | /*-------------------------------------------------------------------------*/ | |
1221 | ||
777baa47 | 1222 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1223 | { |
1224 | struct usbnet *dev = netdev_priv(net); | |
1225 | ||
1226 | unlink_urbs (dev, &dev->txq); | |
1227 | tasklet_schedule (&dev->bh); | |
1228 | ||
1229 | // FIXME: device recovery -- reset? | |
1230 | } | |
777baa47 | 1231 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1232 | |
1233 | /*-------------------------------------------------------------------------*/ | |
1234 | ||
638c5115 ML |
1235 | static int build_dma_sg(const struct sk_buff *skb, struct urb *urb) |
1236 | { | |
1237 | unsigned num_sgs, total_len = 0; | |
1238 | int i, s = 0; | |
1239 | ||
1240 | num_sgs = skb_shinfo(skb)->nr_frags + 1; | |
1241 | if (num_sgs == 1) | |
1242 | return 0; | |
1243 | ||
60e453a9 ML |
1244 | /* reserve one for zero packet */ |
1245 | urb->sg = kmalloc((num_sgs + 1) * sizeof(struct scatterlist), | |
1246 | GFP_ATOMIC); | |
638c5115 ML |
1247 | if (!urb->sg) |
1248 | return -ENOMEM; | |
1249 | ||
1250 | urb->num_sgs = num_sgs; | |
1251 | sg_init_table(urb->sg, urb->num_sgs); | |
1252 | ||
1253 | sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb)); | |
1254 | total_len += skb_headlen(skb); | |
1255 | ||
1256 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1257 | struct skb_frag_struct *f = &skb_shinfo(skb)->frags[i]; | |
1258 | ||
1259 | total_len += skb_frag_size(f); | |
1260 | sg_set_page(&urb->sg[i + s], f->page.p, f->size, | |
1261 | f->page_offset); | |
1262 | } | |
1263 | urb->transfer_buffer_length = total_len; | |
1264 | ||
1265 | return 1; | |
1266 | } | |
1267 | ||
25a79c41 SH |
1268 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1269 | struct net_device *net) | |
1da177e4 LT |
1270 | { |
1271 | struct usbnet *dev = netdev_priv(net); | |
1272 | int length; | |
1da177e4 LT |
1273 | struct urb *urb = NULL; |
1274 | struct skb_data *entry; | |
1275 | struct driver_info *info = dev->driver_info; | |
1276 | unsigned long flags; | |
25a79c41 | 1277 | int retval; |
1da177e4 | 1278 | |
23ba0799 KK |
1279 | if (skb) |
1280 | skb_tx_timestamp(skb); | |
f9b491ec | 1281 | |
1da177e4 LT |
1282 | // some devices want funky USB-level framing, for |
1283 | // win32 driver (usually) and/or hardware quirks | |
1284 | if (info->tx_fixup) { | |
1285 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1286 | if (!skb) { | |
bf414b36 BM |
1287 | /* packet collected; minidriver waiting for more */ |
1288 | if (info->flags & FLAG_MULTI_PACKET) | |
073285fd | 1289 | goto not_drop; |
bf414b36 BM |
1290 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1291 | goto drop; | |
1da177e4 LT |
1292 | } |
1293 | } | |
1da177e4 LT |
1294 | |
1295 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1296 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1297 | goto drop; |
1298 | } | |
1299 | ||
1300 | entry = (struct skb_data *) skb->cb; | |
1301 | entry->urb = urb; | |
1302 | entry->dev = dev; | |
1da177e4 | 1303 | |
1da177e4 LT |
1304 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1305 | skb->data, skb->len, tx_complete, skb); | |
638c5115 ML |
1306 | if (dev->can_dma_sg) { |
1307 | if (build_dma_sg(skb, urb) < 0) | |
1308 | goto drop; | |
1309 | } | |
60e453a9 | 1310 | length = urb->transfer_buffer_length; |
1da177e4 LT |
1311 | |
1312 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1313 | * NOTE: strictly conforming cdc-ether devices should expect | |
1314 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1315 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1316 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1317 | * packet itself if needed. | |
1da177e4 | 1318 | */ |
b4d562e3 EP |
1319 | if (length % dev->maxpacket == 0) { |
1320 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd | 1321 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
60e453a9 ML |
1322 | length++; |
1323 | if (skb_tailroom(skb) && !urb->num_sgs) { | |
073285fd AO |
1324 | skb->data[skb->len] = 0; |
1325 | __skb_put(skb, 1); | |
60e453a9 ML |
1326 | } else if (urb->num_sgs) |
1327 | sg_set_buf(&urb->sg[urb->num_sgs++], | |
1328 | dev->padding_pkt, 1); | |
b4d562e3 EP |
1329 | } |
1330 | } else | |
1331 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1332 | } |
60e453a9 | 1333 | entry->length = urb->transfer_buffer_length = length; |
1da177e4 | 1334 | |
69ee472f ON |
1335 | spin_lock_irqsave(&dev->txq.lock, flags); |
1336 | retval = usb_autopm_get_interface_async(dev->intf); | |
1337 | if (retval < 0) { | |
1338 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1339 | goto drop; | |
1340 | } | |
1341 | ||
1342 | #ifdef CONFIG_PM | |
1343 | /* if this triggers the device is still a sleep */ | |
1344 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1345 | /* transmission will be done in resume */ | |
1346 | usb_anchor_urb(urb, &dev->deferred); | |
1347 | /* no use to process more packets */ | |
1348 | netif_stop_queue(net); | |
39707c2a | 1349 | usb_put_urb(urb); |
69ee472f | 1350 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1351 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1352 | goto deferred; |
1353 | } | |
1354 | #endif | |
1da177e4 | 1355 | |
1da177e4 LT |
1356 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1357 | case -EPIPE: | |
1358 | netif_stop_queue (net); | |
2e55cc72 | 1359 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1360 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1361 | break; |
1362 | default: | |
69ee472f | 1363 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1364 | netif_dbg(dev, tx_err, dev->net, |
1365 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1366 | break; |
1367 | case 0: | |
1368 | net->trans_start = jiffies; | |
5b6e9bcd | 1369 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1370 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1371 | netif_stop_queue (net); | |
1372 | } | |
1373 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1374 | ||
1375 | if (retval) { | |
a475f603 | 1376 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1377 | drop: |
7963837f | 1378 | dev->net->stats.tx_dropped++; |
073285fd | 1379 | not_drop: |
1da177e4 LT |
1380 | if (skb) |
1381 | dev_kfree_skb_any (skb); | |
638c5115 ML |
1382 | if (urb) { |
1383 | kfree(urb->sg); | |
1384 | usb_free_urb(urb); | |
1385 | } | |
a475f603 JP |
1386 | } else |
1387 | netif_dbg(dev, tx_queued, dev->net, | |
1388 | "> tx, len %d, type 0x%x\n", length, skb->protocol); | |
69ee472f ON |
1389 | #ifdef CONFIG_PM |
1390 | deferred: | |
1391 | #endif | |
25a79c41 | 1392 | return NETDEV_TX_OK; |
1da177e4 | 1393 | } |
777baa47 | 1394 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1395 | |
85e87870 | 1396 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1397 | { |
1398 | struct urb *urb; | |
1399 | int i; | |
85e87870 | 1400 | int ret = 0; |
65841fd5 ML |
1401 | |
1402 | /* don't refill the queue all at once */ | |
1403 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1404 | urb = usb_alloc_urb(0, flags); | |
1405 | if (urb != NULL) { | |
85e87870 BM |
1406 | ret = rx_submit(dev, urb, flags); |
1407 | if (ret) | |
1408 | goto err; | |
1409 | } else { | |
1410 | ret = -ENOMEM; | |
1411 | goto err; | |
65841fd5 ML |
1412 | } |
1413 | } | |
85e87870 BM |
1414 | err: |
1415 | return ret; | |
65841fd5 ML |
1416 | } |
1417 | ||
1da177e4 LT |
1418 | /*-------------------------------------------------------------------------*/ |
1419 | ||
1420 | // tasklet (work deferred from completions, in_irq) or timer | |
1421 | ||
1422 | static void usbnet_bh (unsigned long param) | |
1423 | { | |
1424 | struct usbnet *dev = (struct usbnet *) param; | |
1425 | struct sk_buff *skb; | |
1426 | struct skb_data *entry; | |
1427 | ||
1428 | while ((skb = skb_dequeue (&dev->done))) { | |
1429 | entry = (struct skb_data *) skb->cb; | |
1430 | switch (entry->state) { | |
18ab458f | 1431 | case rx_done: |
1da177e4 LT |
1432 | entry->state = rx_cleanup; |
1433 | rx_process (dev, skb); | |
1434 | continue; | |
18ab458f | 1435 | case tx_done: |
638c5115 | 1436 | kfree(entry->urb->sg); |
18ab458f | 1437 | case rx_cleanup: |
1da177e4 LT |
1438 | usb_free_urb (entry->urb); |
1439 | dev_kfree_skb (skb); | |
1440 | continue; | |
18ab458f | 1441 | default: |
60b86755 | 1442 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1443 | } |
1444 | } | |
1445 | ||
70c37bf9 BM |
1446 | /* restart RX again after disabling due to high error rate */ |
1447 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
1448 | ||
1da177e4 LT |
1449 | // waiting for all pending urbs to complete? |
1450 | if (dev->wait) { | |
1451 | if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) { | |
1452 | wake_up (dev->wait); | |
1453 | } | |
1454 | ||
1455 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1456 | } else if (netif_running (dev->net) && |
1457 | netif_device_present (dev->net) && | |
4b49f58f | 1458 | netif_carrier_ok(dev->net) && |
8e95a202 JP |
1459 | !timer_pending (&dev->delay) && |
1460 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1461 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1462 | |
1463 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1464 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1465 | return; | |
a475f603 JP |
1466 | if (temp != dev->rxq.qlen) |
1467 | netif_dbg(dev, link, dev->net, | |
1468 | "rxqlen %d --> %d\n", | |
1469 | temp, dev->rxq.qlen); | |
65841fd5 | 1470 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1471 | tasklet_schedule (&dev->bh); |
1472 | } | |
1473 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1474 | netif_wake_queue (dev->net); | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | ||
1da177e4 LT |
1479 | /*------------------------------------------------------------------------- |
1480 | * | |
1481 | * USB Device Driver support | |
1482 | * | |
1483 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1484 | |
1da177e4 LT |
1485 | // precondition: never called in_interrupt |
1486 | ||
38bde1d4 | 1487 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1488 | { |
1489 | struct usbnet *dev; | |
1490 | struct usb_device *xdev; | |
1491 | struct net_device *net; | |
1492 | ||
1493 | dev = usb_get_intfdata(intf); | |
1494 | usb_set_intfdata(intf, NULL); | |
1495 | if (!dev) | |
1496 | return; | |
1497 | ||
1498 | xdev = interface_to_usbdev (intf); | |
1499 | ||
a475f603 JP |
1500 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1501 | intf->dev.driver->name, | |
1502 | xdev->bus->bus_name, xdev->devpath, | |
1503 | dev->driver_info->description); | |
cb1cebbe | 1504 | |
1da177e4 LT |
1505 | net = dev->net; |
1506 | unregister_netdev (net); | |
1507 | ||
23f333a2 | 1508 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1509 | |
39707c2a HK |
1510 | usb_scuttle_anchored_urbs(&dev->deferred); |
1511 | ||
1da177e4 LT |
1512 | if (dev->driver_info->unbind) |
1513 | dev->driver_info->unbind (dev, intf); | |
1514 | ||
68972efa PS |
1515 | usb_kill_urb(dev->interrupt); |
1516 | usb_free_urb(dev->interrupt); | |
60e453a9 | 1517 | kfree(dev->padding_pkt); |
68972efa | 1518 | |
1da177e4 | 1519 | free_netdev(net); |
1da177e4 | 1520 | } |
38bde1d4 | 1521 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1522 | |
777baa47 SH |
1523 | static const struct net_device_ops usbnet_netdev_ops = { |
1524 | .ndo_open = usbnet_open, | |
1525 | .ndo_stop = usbnet_stop, | |
1526 | .ndo_start_xmit = usbnet_start_xmit, | |
1527 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1528 | .ndo_change_mtu = usbnet_change_mtu, | |
1529 | .ndo_set_mac_address = eth_mac_addr, | |
1530 | .ndo_validate_addr = eth_validate_addr, | |
1531 | }; | |
1da177e4 LT |
1532 | |
1533 | /*-------------------------------------------------------------------------*/ | |
1534 | ||
1da177e4 LT |
1535 | // precondition: never called in_interrupt |
1536 | ||
225794f8 MH |
1537 | static struct device_type wlan_type = { |
1538 | .name = "wlan", | |
1539 | }; | |
1540 | ||
1541 | static struct device_type wwan_type = { | |
1542 | .name = "wwan", | |
1543 | }; | |
1544 | ||
38bde1d4 | 1545 | int |
1da177e4 LT |
1546 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1547 | { | |
1548 | struct usbnet *dev; | |
cb1cebbe | 1549 | struct net_device *net; |
1da177e4 LT |
1550 | struct usb_host_interface *interface; |
1551 | struct driver_info *info; | |
1552 | struct usb_device *xdev; | |
1553 | int status; | |
296c0242 | 1554 | const char *name; |
b0786b43 ML |
1555 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1556 | ||
1557 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1558 | * for usb interface, otherwise usb_autopm_get_interface may return | |
98f541c6 | 1559 | * failure if RUNTIME_PM is enabled. |
b0786b43 ML |
1560 | */ |
1561 | if (!driver->supports_autosuspend) { | |
1562 | driver->supports_autosuspend = 1; | |
1563 | pm_runtime_enable(&udev->dev); | |
1564 | } | |
1da177e4 | 1565 | |
296c0242 | 1566 | name = udev->dev.driver->name; |
1da177e4 LT |
1567 | info = (struct driver_info *) prod->driver_info; |
1568 | if (!info) { | |
296c0242 | 1569 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1570 | return -ENODEV; |
1571 | } | |
1572 | xdev = interface_to_usbdev (udev); | |
1573 | interface = udev->cur_altsetting; | |
1574 | ||
1da177e4 LT |
1575 | status = -ENOMEM; |
1576 | ||
1577 | // set up our own records | |
1578 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1579 | if (!net) |
1da177e4 | 1580 | goto out; |
1da177e4 | 1581 | |
0dacca73 BH |
1582 | /* netdev_printk() needs this so do it as early as possible */ |
1583 | SET_NETDEV_DEV(net, &udev->dev); | |
1584 | ||
1da177e4 LT |
1585 | dev = netdev_priv(net); |
1586 | dev->udev = xdev; | |
a11a6544 | 1587 | dev->intf = udev; |
1da177e4 | 1588 | dev->driver_info = info; |
296c0242 | 1589 | dev->driver_name = name; |
1da177e4 LT |
1590 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1591 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
1592 | skb_queue_head_init (&dev->rxq); | |
1593 | skb_queue_head_init (&dev->txq); | |
1594 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1595 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1596 | dev->bh.func = usbnet_bh; |
1597 | dev->bh.data = (unsigned long) dev; | |
c4028958 | 1598 | INIT_WORK (&dev->kevent, kevent); |
69ee472f | 1599 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1600 | dev->delay.function = usbnet_bh; |
1601 | dev->delay.data = (unsigned long) dev; | |
1602 | init_timer (&dev->delay); | |
a9fc6338 | 1603 | mutex_init (&dev->phy_mutex); |
6eecdc5f DW |
1604 | mutex_init(&dev->interrupt_mutex); |
1605 | dev->interrupt_count = 0; | |
1da177e4 | 1606 | |
1da177e4 LT |
1607 | dev->net = net; |
1608 | strcpy (net->name, "usb%d"); | |
1609 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1610 | ||
2e55cc72 DB |
1611 | /* rx and tx sides can use different message sizes; |
1612 | * bind() should set rx_urb_size in that case. | |
1613 | */ | |
1614 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 LT |
1615 | #if 0 |
1616 | // dma_supported() is deeply broken on almost all architectures | |
1617 | // possible with some EHCI controllers | |
6a35528a | 1618 | if (dma_supported (&udev->dev, DMA_BIT_MASK(64))) |
1da177e4 LT |
1619 | net->features |= NETIF_F_HIGHDMA; |
1620 | #endif | |
1621 | ||
777baa47 | 1622 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1623 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1624 | net->ethtool_ops = &usbnet_ethtool_ops; |
1625 | ||
1626 | // allow device-specific bind/init procedures | |
1627 | // NOTE net->name still not usable ... | |
1628 | if (info->bind) { | |
1629 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1630 | if (status < 0) |
1631 | goto out1; | |
1632 | ||
1da177e4 LT |
1633 | // heuristic: "usb%d" for links we know are two-host, |
1634 | // else "eth%d" when there's reasonable doubt. userspace | |
1635 | // can rename the link if it knows better. | |
8e95a202 | 1636 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1637 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1638 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1639 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1640 | /* WLAN devices should always be named "wlan%d" */ |
1641 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1642 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1643 | /* WWAN devices should always be named "wwan%d" */ |
1644 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1645 | strcpy(net->name, "wwan%d"); | |
f29fc259 | 1646 | |
6509141f WS |
1647 | /* devices that cannot do ARP */ |
1648 | if ((dev->driver_info->flags & FLAG_NOARP) != 0) | |
1649 | net->flags |= IFF_NOARP; | |
1650 | ||
f29fc259 DB |
1651 | /* maybe the remote can't receive an Ethernet MTU */ |
1652 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1653 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1654 | } else if (!info->in || !info->out) |
1655 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1656 | else { |
1657 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1658 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1659 | if (!(info->flags & FLAG_NO_SETINT)) | |
1660 | status = usb_set_interface (xdev, | |
1661 | interface->desc.bInterfaceNumber, | |
1662 | interface->desc.bAlternateSetting); | |
1663 | else | |
1664 | status = 0; | |
1665 | ||
1666 | } | |
9514bfe5 | 1667 | if (status >= 0 && dev->status) |
1da177e4 LT |
1668 | status = init_status (dev, udev); |
1669 | if (status < 0) | |
cb1cebbe | 1670 | goto out3; |
1da177e4 | 1671 | |
2e55cc72 DB |
1672 | if (!dev->rx_urb_size) |
1673 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1674 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1675 | |
eef23b53 BM |
1676 | /* let userspace know we have a random address */ |
1677 | if (ether_addr_equal(net->dev_addr, node_id)) | |
1678 | net->addr_assign_type = NET_ADDR_RANDOM; | |
1679 | ||
225794f8 MH |
1680 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1681 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1682 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1683 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1684 | ||
a88c32ae ML |
1685 | /* initialize max rx_qlen and tx_qlen */ |
1686 | usbnet_update_max_qlen(dev); | |
1687 | ||
60e453a9 ML |
1688 | if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) && |
1689 | !(info->flags & FLAG_MULTI_PACKET)) { | |
1690 | dev->padding_pkt = kzalloc(1, GFP_KERNEL); | |
1691 | if (!dev->padding_pkt) | |
1692 | goto out4; | |
1693 | } | |
1694 | ||
1da177e4 LT |
1695 | status = register_netdev (net); |
1696 | if (status) | |
60e453a9 | 1697 | goto out5; |
a475f603 JP |
1698 | netif_info(dev, probe, dev->net, |
1699 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1700 | udev->dev.driver->name, | |
1701 | xdev->bus->bus_name, xdev->devpath, | |
1702 | dev->driver_info->description, | |
1703 | net->dev_addr); | |
1da177e4 LT |
1704 | |
1705 | // ok, it's ready to go. | |
1706 | usb_set_intfdata (udev, dev); | |
1707 | ||
1da177e4 LT |
1708 | netif_device_attach (net); |
1709 | ||
37e8273c | 1710 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
0162c554 | 1711 | usbnet_link_change(dev, 0, 0); |
37e8273c | 1712 | |
1da177e4 LT |
1713 | return 0; |
1714 | ||
60e453a9 ML |
1715 | out5: |
1716 | kfree(dev->padding_pkt); | |
a4723848 | 1717 | out4: |
1718 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1719 | out3: |
1720 | if (info->unbind) | |
1721 | info->unbind (dev, udev); | |
1722 | out1: | |
1723 | free_netdev(net); | |
1724 | out: | |
1da177e4 LT |
1725 | return status; |
1726 | } | |
38bde1d4 | 1727 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1728 | |
1729 | /*-------------------------------------------------------------------------*/ | |
1730 | ||
36433127 ON |
1731 | /* |
1732 | * suspend the whole driver as soon as the first interface is suspended | |
1733 | * resume only when the last interface is resumed | |
38bde1d4 | 1734 | */ |
1da177e4 | 1735 | |
38bde1d4 | 1736 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1737 | { |
1738 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1739 | |
36433127 | 1740 | if (!dev->suspend_count++) { |
69ee472f ON |
1741 | spin_lock_irq(&dev->txq.lock); |
1742 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1743 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1744 | dev->suspend_count--; |
69ee472f ON |
1745 | spin_unlock_irq(&dev->txq.lock); |
1746 | return -EBUSY; | |
1747 | } else { | |
1748 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1749 | spin_unlock_irq(&dev->txq.lock); | |
1750 | } | |
a11a6544 ON |
1751 | /* |
1752 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1753 | * having everything error out. |
1754 | */ | |
1755 | netif_device_detach (dev->net); | |
69ee472f | 1756 | usbnet_terminate_urbs(dev); |
6eecdc5f | 1757 | __usbnet_status_stop_force(dev); |
69ee472f | 1758 | |
a11a6544 ON |
1759 | /* |
1760 | * reattach so runtime management can use and | |
1761 | * wake the device | |
1762 | */ | |
1763 | netif_device_attach (dev->net); | |
36433127 | 1764 | } |
1da177e4 LT |
1765 | return 0; |
1766 | } | |
38bde1d4 | 1767 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1768 | |
38bde1d4 | 1769 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1770 | { |
1771 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1772 | struct sk_buff *skb; |
1773 | struct urb *res; | |
1774 | int retval; | |
1775 | ||
1776 | if (!--dev->suspend_count) { | |
6eecdc5f DW |
1777 | /* resume interrupt URB if it was previously submitted */ |
1778 | __usbnet_status_start_force(dev, GFP_NOIO); | |
68972efa | 1779 | |
69ee472f ON |
1780 | spin_lock_irq(&dev->txq.lock); |
1781 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1782 | ||
69ee472f ON |
1783 | skb = (struct sk_buff *)res->context; |
1784 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1785 | if (retval < 0) { | |
1786 | dev_kfree_skb_any(skb); | |
638c5115 | 1787 | kfree(res->sg); |
69ee472f ON |
1788 | usb_free_urb(res); |
1789 | usb_autopm_put_interface_async(dev->intf); | |
1790 | } else { | |
1791 | dev->net->trans_start = jiffies; | |
1792 | __skb_queue_tail(&dev->txq, skb); | |
1793 | } | |
1794 | } | |
1da177e4 | 1795 | |
69ee472f ON |
1796 | smp_mb(); |
1797 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1798 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1799 | |
1800 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
65841fd5 ML |
1801 | /* handle remote wakeup ASAP */ |
1802 | if (!dev->wait && | |
1803 | netif_device_present(dev->net) && | |
1804 | !timer_pending(&dev->delay) && | |
1805 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1806 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1807 | |
75bd0cbd | 1808 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1809 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1810 | tasklet_schedule (&dev->bh); |
1811 | } | |
69ee472f | 1812 | } |
5d9d01a3 ON |
1813 | |
1814 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1815 | usb_autopm_get_interface_no_resume(intf); | |
1816 | ||
1da177e4 LT |
1817 | return 0; |
1818 | } | |
38bde1d4 | 1819 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1820 | |
5d9d01a3 ON |
1821 | /* |
1822 | * Either a subdriver implements manage_power, then it is assumed to always | |
1823 | * be ready to be suspended or it reports the readiness to be suspended | |
1824 | * explicitly | |
1825 | */ | |
1826 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1827 | { | |
1828 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1829 | dev->intf->needs_remote_wakeup = 1; | |
1830 | usb_autopm_put_interface_async(dev->intf); | |
1831 | } | |
1832 | } | |
1833 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1834 | |
2dd7c8cf ON |
1835 | /* |
1836 | * For devices that can do without special commands | |
1837 | */ | |
1838 | int usbnet_manage_power(struct usbnet *dev, int on) | |
1839 | { | |
1840 | dev->intf->needs_remote_wakeup = on; | |
1841 | return 0; | |
1842 | } | |
1843 | EXPORT_SYMBOL(usbnet_manage_power); | |
1844 | ||
ac64995d ML |
1845 | void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset) |
1846 | { | |
1847 | /* update link after link is reseted */ | |
1848 | if (link && !need_reset) | |
1849 | netif_carrier_on(dev->net); | |
1850 | else | |
1851 | netif_carrier_off(dev->net); | |
1852 | ||
1853 | if (need_reset && link) | |
1854 | usbnet_defer_kevent(dev, EVENT_LINK_RESET); | |
4b49f58f ML |
1855 | else |
1856 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); | |
ac64995d ML |
1857 | } |
1858 | EXPORT_SYMBOL(usbnet_link_change); | |
1859 | ||
877bd862 | 1860 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1861 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1862 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1863 | { |
1864 | void *buf = NULL; | |
1865 | int err = -ENOMEM; | |
1866 | ||
1867 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1868 | " value=0x%04x index=0x%04x size=%d\n", | |
1869 | cmd, reqtype, value, index, size); | |
1870 | ||
1871 | if (data) { | |
1872 | buf = kmalloc(size, GFP_KERNEL); | |
1873 | if (!buf) | |
1874 | goto out; | |
1875 | } | |
1876 | ||
1877 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1878 | cmd, reqtype, value, index, buf, size, | |
1879 | USB_CTRL_GET_TIMEOUT); | |
1880 | if (err > 0 && err <= size) | |
1881 | memcpy(data, buf, err); | |
1882 | kfree(buf); | |
1883 | out: | |
1884 | return err; | |
1885 | } | |
877bd862 | 1886 | |
0547fad2 ML |
1887 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1888 | u16 value, u16 index, const void *data, | |
1889 | u16 size) | |
877bd862 ML |
1890 | { |
1891 | void *buf = NULL; | |
1892 | int err = -ENOMEM; | |
1893 | ||
1894 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1895 | " value=0x%04x index=0x%04x size=%d\n", | |
1896 | cmd, reqtype, value, index, size); | |
1897 | ||
1898 | if (data) { | |
1899 | buf = kmemdup(data, size, GFP_KERNEL); | |
1900 | if (!buf) | |
1901 | goto out; | |
1902 | } | |
1903 | ||
1904 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1905 | cmd, reqtype, value, index, buf, size, | |
1906 | USB_CTRL_SET_TIMEOUT); | |
1907 | kfree(buf); | |
1908 | ||
1909 | out: | |
1910 | return err; | |
1911 | } | |
0547fad2 ML |
1912 | |
1913 | /* | |
1914 | * The function can't be called inside suspend/resume callback, | |
1915 | * otherwise deadlock will be caused. | |
1916 | */ | |
1917 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1918 | u16 value, u16 index, void *data, u16 size) | |
1919 | { | |
6f0a0986 ML |
1920 | int ret; |
1921 | ||
1922 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1923 | return -ENODEV; | |
1924 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1925 | data, size); | |
1926 | usb_autopm_put_interface(dev->intf); | |
1927 | return ret; | |
0547fad2 ML |
1928 | } |
1929 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
1930 | ||
1931 | /* | |
1932 | * The function can't be called inside suspend/resume callback, | |
1933 | * otherwise deadlock will be caused. | |
1934 | */ | |
1935 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1936 | u16 value, u16 index, const void *data, u16 size) | |
1937 | { | |
6f0a0986 ML |
1938 | int ret; |
1939 | ||
1940 | if (usb_autopm_get_interface(dev->intf) < 0) | |
1941 | return -ENODEV; | |
1942 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1943 | data, size); | |
1944 | usb_autopm_put_interface(dev->intf); | |
1945 | return ret; | |
0547fad2 | 1946 | } |
877bd862 ML |
1947 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
1948 | ||
0547fad2 ML |
1949 | /* |
1950 | * The function can be called inside suspend/resume callback safely | |
1951 | * and should only be called by suspend/resume callback generally. | |
1952 | */ | |
1953 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1954 | u16 value, u16 index, void *data, u16 size) | |
1955 | { | |
1956 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
1957 | data, size); | |
1958 | } | |
1959 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
1960 | ||
1961 | /* | |
1962 | * The function can be called inside suspend/resume callback safely | |
1963 | * and should only be called by suspend/resume callback generally. | |
1964 | */ | |
1965 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
1966 | u16 value, u16 index, const void *data, | |
1967 | u16 size) | |
1968 | { | |
1969 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
1970 | data, size); | |
1971 | } | |
1972 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
1973 | ||
877bd862 ML |
1974 | static void usbnet_async_cmd_cb(struct urb *urb) |
1975 | { | |
1976 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
1977 | int status = urb->status; | |
1978 | ||
1979 | if (status < 0) | |
1980 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
1981 | __func__, status); | |
1982 | ||
1983 | kfree(req); | |
1984 | usb_free_urb(urb); | |
1985 | } | |
1986 | ||
0547fad2 ML |
1987 | /* |
1988 | * The caller must make sure that device can't be put into suspend | |
1989 | * state until the control URB completes. | |
1990 | */ | |
877bd862 ML |
1991 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
1992 | u16 value, u16 index, const void *data, u16 size) | |
1993 | { | |
1994 | struct usb_ctrlrequest *req = NULL; | |
1995 | struct urb *urb; | |
1996 | int err = -ENOMEM; | |
1997 | void *buf = NULL; | |
1998 | ||
1999 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
2000 | " value=0x%04x index=0x%04x size=%d\n", | |
2001 | cmd, reqtype, value, index, size); | |
2002 | ||
2003 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
2004 | if (!urb) { | |
2005 | netdev_err(dev->net, "Error allocating URB in" | |
2006 | " %s!\n", __func__); | |
2007 | goto fail; | |
2008 | } | |
2009 | ||
2010 | if (data) { | |
2011 | buf = kmemdup(data, size, GFP_ATOMIC); | |
2012 | if (!buf) { | |
2013 | netdev_err(dev->net, "Error allocating buffer" | |
2014 | " in %s!\n", __func__); | |
2015 | goto fail_free; | |
2016 | } | |
2017 | } | |
2018 | ||
2019 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
38673c82 | 2020 | if (!req) |
877bd862 | 2021 | goto fail_free_buf; |
877bd862 ML |
2022 | |
2023 | req->bRequestType = reqtype; | |
2024 | req->bRequest = cmd; | |
2025 | req->wValue = cpu_to_le16(value); | |
2026 | req->wIndex = cpu_to_le16(index); | |
2027 | req->wLength = cpu_to_le16(size); | |
2028 | ||
2029 | usb_fill_control_urb(urb, dev->udev, | |
2030 | usb_sndctrlpipe(dev->udev, 0), | |
2031 | (void *)req, buf, size, | |
2032 | usbnet_async_cmd_cb, req); | |
2033 | urb->transfer_flags |= URB_FREE_BUFFER; | |
2034 | ||
2035 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
2036 | if (err < 0) { | |
2037 | netdev_err(dev->net, "Error submitting the control" | |
2038 | " message: status=%d\n", err); | |
2039 | goto fail_free; | |
2040 | } | |
2041 | return 0; | |
2042 | ||
2043 | fail_free_buf: | |
2044 | kfree(buf); | |
2045 | fail_free: | |
2046 | kfree(req); | |
2047 | usb_free_urb(urb); | |
2048 | fail: | |
2049 | return err; | |
2050 | ||
2051 | } | |
2052 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
2053 | /*-------------------------------------------------------------------------*/ |
2054 | ||
f29fc259 | 2055 | static int __init usbnet_init(void) |
1da177e4 | 2056 | { |
c582a950 TF |
2057 | /* Compiler should optimize this out. */ |
2058 | BUILD_BUG_ON( | |
2059 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 2060 | |
c7e12ead | 2061 | eth_random_addr(node_id); |
cb1cebbe | 2062 | return 0; |
1da177e4 | 2063 | } |
f29fc259 | 2064 | module_init(usbnet_init); |
1da177e4 | 2065 | |
f29fc259 | 2066 | static void __exit usbnet_exit(void) |
1da177e4 | 2067 | { |
1da177e4 | 2068 | } |
f29fc259 | 2069 | module_exit(usbnet_exit); |
1da177e4 | 2070 | |
f29fc259 | 2071 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 2072 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 2073 | MODULE_LICENSE("GPL"); |