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 | |
9cb00073 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
1da177e4 LT |
18 | */ |
19 | ||
20 | /* | |
21 | * This is a generic "USB networking" framework that works with several | |
090ffa9d DB |
22 | * kinds of full and high speed networking devices: host-to-host cables, |
23 | * smart usb peripherals, and actual Ethernet adapters. | |
1da177e4 | 24 | * |
090ffa9d DB |
25 | * These devices usually differ in terms of control protocols (if they |
26 | * even have one!) and sometimes they define new framing to wrap or batch | |
27 | * Ethernet packets. Otherwise, they talk to USB pretty much the same, | |
28 | * so interface (un)binding, endpoint I/O queues, fault handling, and other | |
29 | * issues can usefully be addressed by this framework. | |
30 | */ | |
1da177e4 LT |
31 | |
32 | // #define DEBUG // error path messages, extra info | |
33 | // #define VERBOSE // more; success messages | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/etherdevice.h> | |
03ad032b | 39 | #include <linux/ctype.h> |
1da177e4 LT |
40 | #include <linux/ethtool.h> |
41 | #include <linux/workqueue.h> | |
42 | #include <linux/mii.h> | |
1da177e4 | 43 | #include <linux/usb.h> |
3692e94f | 44 | #include <linux/usb/usbnet.h> |
c40a2c88 | 45 | #include <linux/usb/cdc.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
fd1f170d | 47 | #include <linux/kernel.h> |
b0786b43 | 48 | #include <linux/pm_runtime.h> |
f29fc259 DB |
49 | |
50 | #define DRIVER_VERSION "22-Aug-2005" | |
1da177e4 LT |
51 | |
52 | ||
53 | /*-------------------------------------------------------------------------*/ | |
54 | ||
55 | /* | |
56 | * Nineteen USB 1.1 max size bulk transactions per frame (ms), max. | |
57 | * Several dozen bytes of IPv4 data can fit in two such transactions. | |
58 | * One maximum size Ethernet packet takes twenty four of them. | |
59 | * For high speed, each frame comfortably fits almost 36 max size | |
60 | * Ethernet packets (so queues should be bigger). | |
f29fc259 | 61 | * |
a88c32ae ML |
62 | * The goal is to let the USB host controller be busy for 5msec or |
63 | * more before an irq is required, under load. Jumbograms change | |
64 | * the equation. | |
1da177e4 | 65 | */ |
a88c32ae ML |
66 | #define MAX_QUEUE_MEMORY (60 * 1518) |
67 | #define RX_QLEN(dev) ((dev)->rx_qlen) | |
68 | #define TX_QLEN(dev) ((dev)->tx_qlen) | |
1da177e4 | 69 | |
1da177e4 LT |
70 | // reawaken network queue this soon after stopping; else watchdog barks |
71 | #define TX_TIMEOUT_JIFFIES (5*HZ) | |
72 | ||
37ebb549 PM |
73 | /* throttle rx/tx briefly after some faults, so hub_wq might disconnect() |
74 | * us (it polls at HZ/4 usually) before we report too many false errors. | |
75 | */ | |
1da177e4 LT |
76 | #define THROTTLE_JIFFIES (HZ/8) |
77 | ||
1da177e4 LT |
78 | // between wakeups |
79 | #define UNLINK_TIMEOUT_MS 3 | |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
83 | // randomly generated ethernet address | |
84 | static u8 node_id [ETH_ALEN]; | |
85 | ||
1da177e4 LT |
86 | static const char driver_name [] = "usbnet"; |
87 | ||
88 | /* use ethtool to change the level for any given device */ | |
89 | static int msg_level = -1; | |
90 | module_param (msg_level, int, 0); | |
91 | MODULE_PARM_DESC (msg_level, "Override default message level"); | |
92 | ||
1da177e4 LT |
93 | /*-------------------------------------------------------------------------*/ |
94 | ||
1da177e4 | 95 | /* handles CDC Ethernet and many other network "bulk data" interfaces */ |
2e55cc72 | 96 | int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) |
1da177e4 LT |
97 | { |
98 | int tmp; | |
99 | struct usb_host_interface *alt = NULL; | |
100 | struct usb_host_endpoint *in = NULL, *out = NULL; | |
101 | struct usb_host_endpoint *status = NULL; | |
102 | ||
103 | for (tmp = 0; tmp < intf->num_altsetting; tmp++) { | |
104 | unsigned ep; | |
105 | ||
106 | in = out = status = NULL; | |
107 | alt = intf->altsetting + tmp; | |
108 | ||
109 | /* take the first altsetting with in-bulk + out-bulk; | |
110 | * remember any status endpoint, just in case; | |
70f23fd6 | 111 | * ignore other endpoints and altsettings. |
1da177e4 LT |
112 | */ |
113 | for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { | |
114 | struct usb_host_endpoint *e; | |
115 | int intr = 0; | |
116 | ||
117 | e = alt->endpoint + ep; | |
118 | switch (e->desc.bmAttributes) { | |
119 | case USB_ENDPOINT_XFER_INT: | |
fc6e2544 | 120 | if (!usb_endpoint_dir_in(&e->desc)) |
1da177e4 LT |
121 | continue; |
122 | intr = 1; | |
123 | /* FALLTHROUGH */ | |
124 | case USB_ENDPOINT_XFER_BULK: | |
125 | break; | |
126 | default: | |
127 | continue; | |
128 | } | |
fc6e2544 | 129 | if (usb_endpoint_dir_in(&e->desc)) { |
1da177e4 LT |
130 | if (!intr && !in) |
131 | in = e; | |
132 | else if (intr && !status) | |
133 | status = e; | |
134 | } else { | |
135 | if (!out) | |
136 | out = e; | |
137 | } | |
138 | } | |
139 | if (in && out) | |
140 | break; | |
141 | } | |
142 | if (!alt || !in || !out) | |
143 | return -EINVAL; | |
144 | ||
8e95a202 JP |
145 | if (alt->desc.bAlternateSetting != 0 || |
146 | !(dev->driver_info->flags & FLAG_NO_SETINT)) { | |
1da177e4 LT |
147 | tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber, |
148 | alt->desc.bAlternateSetting); | |
149 | if (tmp < 0) | |
150 | return tmp; | |
151 | } | |
cb1cebbe | 152 | |
1da177e4 LT |
153 | dev->in = usb_rcvbulkpipe (dev->udev, |
154 | in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
155 | dev->out = usb_sndbulkpipe (dev->udev, | |
156 | out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
157 | dev->status = status; | |
158 | return 0; | |
159 | } | |
2e55cc72 | 160 | EXPORT_SYMBOL_GPL(usbnet_get_endpoints); |
1da177e4 | 161 | |
03ad032b PH |
162 | int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress) |
163 | { | |
51487ae7 | 164 | int tmp = -1, ret; |
03ad032b PH |
165 | unsigned char buf [13]; |
166 | ||
51487ae7 AS |
167 | ret = usb_string(dev->udev, iMACAddress, buf, sizeof buf); |
168 | if (ret == 12) | |
169 | tmp = hex2bin(dev->net->dev_addr, buf, 6); | |
170 | if (tmp < 0) { | |
03ad032b PH |
171 | dev_dbg(&dev->udev->dev, |
172 | "bad MAC string %d fetch, %d\n", iMACAddress, tmp); | |
51487ae7 AS |
173 | if (ret >= 0) |
174 | ret = -EINVAL; | |
175 | return ret; | |
03ad032b | 176 | } |
03ad032b PH |
177 | return 0; |
178 | } | |
179 | EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr); | |
180 | ||
24ead299 | 181 | static void intr_complete (struct urb *urb) |
182 | { | |
183 | struct usbnet *dev = urb->context; | |
184 | int status = urb->status; | |
185 | ||
186 | switch (status) { | |
187 | /* success */ | |
188 | case 0: | |
189 | dev->driver_info->status(dev, urb); | |
190 | break; | |
191 | ||
192 | /* software-driven interface shutdown */ | |
193 | case -ENOENT: /* urb killed */ | |
194 | case -ESHUTDOWN: /* hardware gone */ | |
195 | netif_dbg(dev, ifdown, dev->net, | |
196 | "intr shutdown, code %d\n", status); | |
197 | return; | |
198 | ||
199 | /* NOTE: not throttling like RX/TX, since this endpoint | |
200 | * already polls infrequently | |
201 | */ | |
202 | default: | |
203 | netdev_dbg(dev->net, "intr status %d\n", status); | |
204 | break; | |
205 | } | |
206 | ||
24ead299 | 207 | status = usb_submit_urb (urb, GFP_ATOMIC); |
208 | if (status != 0) | |
209 | netif_err(dev, timer, dev->net, | |
210 | "intr resubmit --> %d\n", status); | |
211 | } | |
1da177e4 LT |
212 | |
213 | static int init_status (struct usbnet *dev, struct usb_interface *intf) | |
214 | { | |
215 | char *buf = NULL; | |
216 | unsigned pipe = 0; | |
217 | unsigned maxp; | |
218 | unsigned period; | |
219 | ||
220 | if (!dev->driver_info->status) | |
221 | return 0; | |
222 | ||
223 | pipe = usb_rcvintpipe (dev->udev, | |
224 | dev->status->desc.bEndpointAddress | |
225 | & USB_ENDPOINT_NUMBER_MASK); | |
226 | maxp = usb_maxpacket (dev->udev, pipe, 0); | |
227 | ||
228 | /* avoid 1 msec chatter: min 8 msec poll rate */ | |
229 | period = max ((int) dev->status->desc.bInterval, | |
230 | (dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3); | |
231 | ||
e94b1766 | 232 | buf = kmalloc (maxp, GFP_KERNEL); |
1da177e4 | 233 | if (buf) { |
e94b1766 | 234 | dev->interrupt = usb_alloc_urb (0, GFP_KERNEL); |
1da177e4 LT |
235 | if (!dev->interrupt) { |
236 | kfree (buf); | |
237 | return -ENOMEM; | |
238 | } else { | |
239 | usb_fill_int_urb(dev->interrupt, dev->udev, pipe, | |
240 | buf, maxp, intr_complete, dev, period); | |
720f3d7c | 241 | dev->interrupt->transfer_flags |= URB_FREE_BUFFER; |
1da177e4 LT |
242 | dev_dbg(&intf->dev, |
243 | "status ep%din, %d bytes period %d\n", | |
244 | usb_pipeendpoint(pipe), maxp, period); | |
245 | } | |
246 | } | |
18ab458f | 247 | return 0; |
1da177e4 LT |
248 | } |
249 | ||
6eecdc5f DW |
250 | /* Submit the interrupt URB if not previously submitted, increasing refcount */ |
251 | int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags) | |
252 | { | |
253 | int ret = 0; | |
254 | ||
255 | WARN_ON_ONCE(dev->interrupt == NULL); | |
256 | if (dev->interrupt) { | |
257 | mutex_lock(&dev->interrupt_mutex); | |
258 | ||
259 | if (++dev->interrupt_count == 1) | |
260 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
261 | ||
262 | dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n", | |
263 | dev->interrupt_count); | |
264 | mutex_unlock(&dev->interrupt_mutex); | |
265 | } | |
266 | return ret; | |
267 | } | |
268 | EXPORT_SYMBOL_GPL(usbnet_status_start); | |
269 | ||
270 | /* For resume; submit interrupt URB if previously submitted */ | |
271 | static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags) | |
272 | { | |
273 | int ret = 0; | |
274 | ||
275 | mutex_lock(&dev->interrupt_mutex); | |
276 | if (dev->interrupt_count) { | |
277 | ret = usb_submit_urb(dev->interrupt, mem_flags); | |
278 | dev_dbg(&dev->udev->dev, | |
279 | "submitted interrupt URB for resume\n"); | |
280 | } | |
281 | mutex_unlock(&dev->interrupt_mutex); | |
282 | return ret; | |
283 | } | |
284 | ||
285 | /* Kill the interrupt URB if all submitters want it killed */ | |
286 | void usbnet_status_stop(struct usbnet *dev) | |
287 | { | |
288 | if (dev->interrupt) { | |
289 | mutex_lock(&dev->interrupt_mutex); | |
290 | WARN_ON(dev->interrupt_count == 0); | |
291 | ||
292 | if (dev->interrupt_count && --dev->interrupt_count == 0) | |
293 | usb_kill_urb(dev->interrupt); | |
294 | ||
295 | dev_dbg(&dev->udev->dev, | |
296 | "decremented interrupt URB count to %d\n", | |
297 | dev->interrupt_count); | |
298 | mutex_unlock(&dev->interrupt_mutex); | |
299 | } | |
300 | } | |
301 | EXPORT_SYMBOL_GPL(usbnet_status_stop); | |
302 | ||
303 | /* For suspend; always kill interrupt URB */ | |
304 | static void __usbnet_status_stop_force(struct usbnet *dev) | |
305 | { | |
306 | if (dev->interrupt) { | |
307 | mutex_lock(&dev->interrupt_mutex); | |
308 | usb_kill_urb(dev->interrupt); | |
309 | dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n"); | |
310 | mutex_unlock(&dev->interrupt_mutex); | |
311 | } | |
312 | } | |
313 | ||
2e55cc72 DB |
314 | /* Passes this packet up the stack, updating its accounting. |
315 | * Some link protocols batch packets, so their rx_fixup paths | |
316 | * can return clones as well as just modify the original skb. | |
317 | */ | |
318 | void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb) | |
1da177e4 LT |
319 | { |
320 | int status; | |
321 | ||
7834ddbc JK |
322 | if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { |
323 | skb_queue_tail(&dev->rxq_pause, skb); | |
324 | return; | |
325 | } | |
326 | ||
1da177e4 | 327 | skb->protocol = eth_type_trans (skb, dev->net); |
7963837f HX |
328 | dev->net->stats.rx_packets++; |
329 | dev->net->stats.rx_bytes += skb->len; | |
1da177e4 | 330 | |
a475f603 JP |
331 | netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", |
332 | skb->len + sizeof (struct ethhdr), skb->protocol); | |
1da177e4 | 333 | memset (skb->cb, 0, sizeof (struct skb_data)); |
f9b491ec MR |
334 | |
335 | if (skb_defer_rx_timestamp(skb)) | |
336 | return; | |
337 | ||
1da177e4 | 338 | status = netif_rx (skb); |
a475f603 JP |
339 | if (status != NET_RX_SUCCESS) |
340 | netif_dbg(dev, rx_err, dev->net, | |
341 | "netif_rx status %d\n", status); | |
1da177e4 | 342 | } |
2e55cc72 | 343 | EXPORT_SYMBOL_GPL(usbnet_skb_return); |
1da177e4 | 344 | |
a88c32ae ML |
345 | /* must be called if hard_mtu or rx_urb_size changed */ |
346 | void usbnet_update_max_qlen(struct usbnet *dev) | |
347 | { | |
348 | enum usb_device_speed speed = dev->udev->speed; | |
349 | ||
350 | switch (speed) { | |
351 | case USB_SPEED_HIGH: | |
352 | dev->rx_qlen = MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
353 | dev->tx_qlen = MAX_QUEUE_MEMORY / dev->hard_mtu; | |
354 | break; | |
452c447a ML |
355 | case USB_SPEED_SUPER: |
356 | /* | |
357 | * Not take default 5ms qlen for super speed HC to | |
358 | * save memory, and iperf tests show 2.5ms qlen can | |
359 | * work well | |
360 | */ | |
361 | dev->rx_qlen = 5 * MAX_QUEUE_MEMORY / dev->rx_urb_size; | |
362 | dev->tx_qlen = 5 * MAX_QUEUE_MEMORY / dev->hard_mtu; | |
363 | break; | |
a88c32ae ML |
364 | default: |
365 | dev->rx_qlen = dev->tx_qlen = 4; | |
366 | } | |
367 | } | |
368 | EXPORT_SYMBOL_GPL(usbnet_update_max_qlen); | |
369 | ||
1da177e4 LT |
370 | \f |
371 | /*------------------------------------------------------------------------- | |
372 | * | |
373 | * Network Device Driver (peer link to "Host Device", from USB host) | |
374 | * | |
375 | *-------------------------------------------------------------------------*/ | |
376 | ||
777baa47 | 377 | int usbnet_change_mtu (struct net_device *net, int new_mtu) |
1da177e4 LT |
378 | { |
379 | struct usbnet *dev = netdev_priv(net); | |
f29fc259 | 380 | int ll_mtu = new_mtu + net->hard_header_len; |
a99c1949 JP |
381 | int old_hard_mtu = dev->hard_mtu; |
382 | int old_rx_urb_size = dev->rx_urb_size; | |
1da177e4 | 383 | |
a99c1949 | 384 | if (new_mtu <= 0) |
1da177e4 | 385 | return -EINVAL; |
1da177e4 | 386 | // no second zero-length packet read wanted after mtu-sized packets |
f29fc259 | 387 | if ((ll_mtu % dev->maxpacket) == 0) |
1da177e4 LT |
388 | return -EDOM; |
389 | net->mtu = new_mtu; | |
a99c1949 JP |
390 | |
391 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
392 | if (dev->rx_urb_size == old_hard_mtu) { | |
393 | dev->rx_urb_size = dev->hard_mtu; | |
394 | if (dev->rx_urb_size > old_rx_urb_size) | |
395 | usbnet_unlink_rx_urbs(dev); | |
396 | } | |
397 | ||
a88c32ae ML |
398 | /* max qlen depend on hard_mtu and rx_urb_size */ |
399 | usbnet_update_max_qlen(dev); | |
400 | ||
1da177e4 LT |
401 | return 0; |
402 | } | |
777baa47 | 403 | EXPORT_SYMBOL_GPL(usbnet_change_mtu); |
1da177e4 | 404 | |
5b6e9bcd ML |
405 | /* The caller must hold list->lock */ |
406 | static void __usbnet_queue_skb(struct sk_buff_head *list, | |
407 | struct sk_buff *newsk, enum skb_state state) | |
408 | { | |
409 | struct skb_data *entry = (struct skb_data *) newsk->cb; | |
410 | ||
411 | __skb_queue_tail(list, newsk); | |
412 | entry->state = state; | |
413 | } | |
414 | ||
1da177e4 LT |
415 | /*-------------------------------------------------------------------------*/ |
416 | ||
1da177e4 LT |
417 | /* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from |
418 | * completion callbacks. 2.5 should have fixed those bugs... | |
419 | */ | |
420 | ||
5b6e9bcd ML |
421 | static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb, |
422 | struct sk_buff_head *list, enum skb_state state) | |
1da177e4 | 423 | { |
1da177e4 | 424 | unsigned long flags; |
5b6e9bcd ML |
425 | enum skb_state old_state; |
426 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1da177e4 | 427 | |
8728b834 | 428 | spin_lock_irqsave(&list->lock, flags); |
5b6e9bcd ML |
429 | old_state = entry->state; |
430 | entry->state = state; | |
8728b834 | 431 | __skb_unlink(skb, list); |
fcb0bb6a ES |
432 | |
433 | /* defer_bh() is never called with list == &dev->done. | |
434 | * spin_lock_nested() tells lockdep that it is OK to take | |
435 | * dev->done.lock here with list->lock held. | |
436 | */ | |
437 | spin_lock_nested(&dev->done.lock, SINGLE_DEPTH_NESTING); | |
438 | ||
8728b834 | 439 | __skb_queue_tail(&dev->done, skb); |
1da177e4 | 440 | if (dev->done.qlen == 1) |
8728b834 | 441 | tasklet_schedule(&dev->bh); |
fcb0bb6a ES |
442 | spin_unlock(&dev->done.lock); |
443 | spin_unlock_irqrestore(&list->lock, flags); | |
5b6e9bcd | 444 | return old_state; |
1da177e4 LT |
445 | } |
446 | ||
447 | /* some work can't be done in tasklets, so we use keventd | |
448 | * | |
449 | * NOTE: annoying asymmetry: if it's active, schedule_work() fails, | |
450 | * but tasklet_schedule() doesn't. hope the failure is rare. | |
451 | */ | |
2e55cc72 | 452 | void usbnet_defer_kevent (struct usbnet *dev, int work) |
1da177e4 LT |
453 | { |
454 | set_bit (work, &dev->flags); | |
9532021d SG |
455 | if (!schedule_work (&dev->kevent)) { |
456 | if (net_ratelimit()) | |
457 | netdev_err(dev->net, "kevent %d may have been dropped\n", work); | |
458 | } else { | |
60b86755 | 459 | netdev_dbg(dev->net, "kevent %d scheduled\n", work); |
9532021d | 460 | } |
1da177e4 | 461 | } |
2e55cc72 | 462 | EXPORT_SYMBOL_GPL(usbnet_defer_kevent); |
1da177e4 LT |
463 | |
464 | /*-------------------------------------------------------------------------*/ | |
465 | ||
7d12e780 | 466 | static void rx_complete (struct urb *urb); |
1da177e4 | 467 | |
dacb3975 | 468 | static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags) |
1da177e4 LT |
469 | { |
470 | struct sk_buff *skb; | |
471 | struct skb_data *entry; | |
472 | int retval = 0; | |
473 | unsigned long lockflags; | |
2e55cc72 | 474 | size_t size = dev->rx_urb_size; |
1da177e4 | 475 | |
70c37bf9 BM |
476 | /* prevent rx skb allocation when error ratio is high */ |
477 | if (test_bit(EVENT_RX_KILL, &dev->flags)) { | |
478 | usb_free_urb(urb); | |
479 | return -ENOLINK; | |
480 | } | |
481 | ||
7bdd4027 ED |
482 | skb = __netdev_alloc_skb_ip_align(dev->net, size, flags); |
483 | if (!skb) { | |
a475f603 | 484 | netif_dbg(dev, rx_err, dev->net, "no rx skb\n"); |
2e55cc72 | 485 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 | 486 | usb_free_urb (urb); |
dacb3975 | 487 | return -ENOMEM; |
1da177e4 | 488 | } |
1da177e4 LT |
489 | |
490 | entry = (struct skb_data *) skb->cb; | |
491 | entry->urb = urb; | |
492 | entry->dev = dev; | |
1da177e4 LT |
493 | entry->length = 0; |
494 | ||
495 | usb_fill_bulk_urb (urb, dev->udev, dev->in, | |
496 | skb->data, size, rx_complete, skb); | |
1da177e4 LT |
497 | |
498 | spin_lock_irqsave (&dev->rxq.lock, lockflags); | |
499 | ||
8e95a202 JP |
500 | if (netif_running (dev->net) && |
501 | netif_device_present (dev->net) && | |
69ee472f ON |
502 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
503 | !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) { | |
18ab458f | 504 | switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) { |
1da177e4 | 505 | case -EPIPE: |
2e55cc72 | 506 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
507 | break; |
508 | case -ENOMEM: | |
2e55cc72 | 509 | usbnet_defer_kevent (dev, EVENT_RX_MEMORY); |
1da177e4 LT |
510 | break; |
511 | case -ENODEV: | |
a475f603 | 512 | netif_dbg(dev, ifdown, dev->net, "device gone\n"); |
1da177e4 LT |
513 | netif_device_detach (dev->net); |
514 | break; | |
dacb3975 DM |
515 | case -EHOSTUNREACH: |
516 | retval = -ENOLINK; | |
517 | break; | |
1da177e4 | 518 | default: |
a475f603 JP |
519 | netif_dbg(dev, rx_err, dev->net, |
520 | "rx submit, %d\n", retval); | |
1da177e4 LT |
521 | tasklet_schedule (&dev->bh); |
522 | break; | |
523 | case 0: | |
5b6e9bcd | 524 | __usbnet_queue_skb(&dev->rxq, skb, rx_start); |
1da177e4 LT |
525 | } |
526 | } else { | |
a475f603 | 527 | netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); |
1da177e4 LT |
528 | retval = -ENOLINK; |
529 | } | |
530 | spin_unlock_irqrestore (&dev->rxq.lock, lockflags); | |
531 | if (retval) { | |
532 | dev_kfree_skb_any (skb); | |
533 | usb_free_urb (urb); | |
534 | } | |
dacb3975 | 535 | return retval; |
1da177e4 LT |
536 | } |
537 | ||
538 | ||
539 | /*-------------------------------------------------------------------------*/ | |
540 | ||
541 | static inline void rx_process (struct usbnet *dev, struct sk_buff *skb) | |
542 | { | |
8e95a202 | 543 | if (dev->driver_info->rx_fixup && |
7a635ea9 AZ |
544 | !dev->driver_info->rx_fixup (dev, skb)) { |
545 | /* With RX_ASSEMBLE, rx_fixup() must update counters */ | |
546 | if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE)) | |
547 | dev->net->stats.rx_errors++; | |
548 | goto done; | |
549 | } | |
1da177e4 LT |
550 | // else network stack removes extra byte if we forced a short packet |
551 | ||
eb85569f EG |
552 | /* all data was already cloned from skb inside the driver */ |
553 | if (dev->driver_info->flags & FLAG_MULTI_PACKET) | |
554 | goto done; | |
555 | ||
556 | if (skb->len < ETH_HLEN) { | |
557 | dev->net->stats.rx_errors++; | |
558 | dev->net->stats.rx_length_errors++; | |
559 | netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len); | |
560 | } else { | |
561 | usbnet_skb_return(dev, skb); | |
073285fd | 562 | return; |
1da177e4 | 563 | } |
073285fd | 564 | |
7a635ea9 | 565 | done: |
073285fd | 566 | skb_queue_tail(&dev->done, skb); |
1da177e4 LT |
567 | } |
568 | ||
569 | /*-------------------------------------------------------------------------*/ | |
570 | ||
7d12e780 | 571 | static void rx_complete (struct urb *urb) |
1da177e4 LT |
572 | { |
573 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
574 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
575 | struct usbnet *dev = entry->dev; | |
576 | int urb_status = urb->status; | |
5b6e9bcd | 577 | enum skb_state state; |
1da177e4 LT |
578 | |
579 | skb_put (skb, urb->actual_length); | |
5b6e9bcd | 580 | state = rx_done; |
1da177e4 LT |
581 | entry->urb = NULL; |
582 | ||
583 | switch (urb_status) { | |
18ab458f DB |
584 | /* success */ |
585 | case 0: | |
1da177e4 LT |
586 | break; |
587 | ||
18ab458f DB |
588 | /* stalls need manual reset. this is rare ... except that |
589 | * when going through USB 2.0 TTs, unplug appears this way. | |
3ac49a1c | 590 | * we avoid the highspeed version of the ETIMEDOUT/EILSEQ |
18ab458f DB |
591 | * storm, recovering as needed. |
592 | */ | |
593 | case -EPIPE: | |
7963837f | 594 | dev->net->stats.rx_errors++; |
2e55cc72 | 595 | usbnet_defer_kevent (dev, EVENT_RX_HALT); |
1da177e4 LT |
596 | // FALLTHROUGH |
597 | ||
18ab458f DB |
598 | /* software-driven interface shutdown */ |
599 | case -ECONNRESET: /* async unlink */ | |
600 | case -ESHUTDOWN: /* hardware gone */ | |
a475f603 JP |
601 | netif_dbg(dev, ifdown, dev->net, |
602 | "rx shutdown, code %d\n", urb_status); | |
1da177e4 LT |
603 | goto block; |
604 | ||
37ebb549 | 605 | /* we get controller i/o faults during hub_wq disconnect() delays. |
18ab458f | 606 | * throttle down resubmits, to avoid log floods; just temporarily, |
37ebb549 | 607 | * so we still recover when the fault isn't a hub_wq delay. |
18ab458f DB |
608 | */ |
609 | case -EPROTO: | |
610 | case -ETIME: | |
611 | case -EILSEQ: | |
7963837f | 612 | dev->net->stats.rx_errors++; |
1da177e4 LT |
613 | if (!timer_pending (&dev->delay)) { |
614 | mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
615 | netif_dbg(dev, link, dev->net, |
616 | "rx throttle %d\n", urb_status); | |
1da177e4 LT |
617 | } |
618 | block: | |
5b6e9bcd | 619 | state = rx_cleanup; |
1da177e4 LT |
620 | entry->urb = urb; |
621 | urb = NULL; | |
622 | break; | |
623 | ||
18ab458f DB |
624 | /* data overrun ... flush fifo? */ |
625 | case -EOVERFLOW: | |
7963837f | 626 | dev->net->stats.rx_over_errors++; |
1da177e4 | 627 | // FALLTHROUGH |
cb1cebbe | 628 | |
18ab458f | 629 | default: |
5b6e9bcd | 630 | state = rx_cleanup; |
7963837f | 631 | dev->net->stats.rx_errors++; |
a475f603 | 632 | netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); |
1da177e4 LT |
633 | break; |
634 | } | |
635 | ||
70c37bf9 BM |
636 | /* stop rx if packet error rate is high */ |
637 | if (++dev->pkt_cnt > 30) { | |
638 | dev->pkt_cnt = 0; | |
639 | dev->pkt_err = 0; | |
640 | } else { | |
641 | if (state == rx_cleanup) | |
642 | dev->pkt_err++; | |
643 | if (dev->pkt_err > 20) | |
644 | set_bit(EVENT_RX_KILL, &dev->flags); | |
645 | } | |
646 | ||
5b6e9bcd | 647 | state = defer_bh(dev, skb, &dev->rxq, state); |
1da177e4 LT |
648 | |
649 | if (urb) { | |
8e95a202 | 650 | if (netif_running (dev->net) && |
5b6e9bcd ML |
651 | !test_bit (EVENT_RX_HALT, &dev->flags) && |
652 | state != unlink_start) { | |
1da177e4 | 653 | rx_submit (dev, urb, GFP_ATOMIC); |
8a783354 | 654 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
655 | return; |
656 | } | |
657 | usb_free_urb (urb); | |
658 | } | |
a475f603 | 659 | netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); |
1da177e4 LT |
660 | } |
661 | ||
7834ddbc JK |
662 | /*-------------------------------------------------------------------------*/ |
663 | void usbnet_pause_rx(struct usbnet *dev) | |
664 | { | |
665 | set_bit(EVENT_RX_PAUSED, &dev->flags); | |
666 | ||
a475f603 | 667 | netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n"); |
7834ddbc JK |
668 | } |
669 | EXPORT_SYMBOL_GPL(usbnet_pause_rx); | |
670 | ||
671 | void usbnet_resume_rx(struct usbnet *dev) | |
672 | { | |
673 | struct sk_buff *skb; | |
674 | int num = 0; | |
675 | ||
676 | clear_bit(EVENT_RX_PAUSED, &dev->flags); | |
677 | ||
678 | while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) { | |
679 | usbnet_skb_return(dev, skb); | |
680 | num++; | |
681 | } | |
682 | ||
683 | tasklet_schedule(&dev->bh); | |
684 | ||
a475f603 JP |
685 | netif_dbg(dev, rx_status, dev->net, |
686 | "paused rx queue disabled, %d skbs requeued\n", num); | |
7834ddbc JK |
687 | } |
688 | EXPORT_SYMBOL_GPL(usbnet_resume_rx); | |
689 | ||
690 | void usbnet_purge_paused_rxq(struct usbnet *dev) | |
691 | { | |
692 | skb_queue_purge(&dev->rxq_pause); | |
693 | } | |
694 | EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq); | |
695 | ||
1da177e4 LT |
696 | /*-------------------------------------------------------------------------*/ |
697 | ||
698 | // unlink pending rx/tx; completion handlers do all other cleanup | |
699 | ||
700 | static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q) | |
701 | { | |
702 | unsigned long flags; | |
5b6e9bcd | 703 | struct sk_buff *skb; |
1da177e4 LT |
704 | int count = 0; |
705 | ||
706 | spin_lock_irqsave (&q->lock, flags); | |
5b6e9bcd | 707 | while (!skb_queue_empty(q)) { |
1da177e4 LT |
708 | struct skb_data *entry; |
709 | struct urb *urb; | |
710 | int retval; | |
711 | ||
5b6e9bcd ML |
712 | skb_queue_walk(q, skb) { |
713 | entry = (struct skb_data *) skb->cb; | |
714 | if (entry->state != unlink_start) | |
715 | goto found; | |
716 | } | |
717 | break; | |
718 | found: | |
719 | entry->state = unlink_start; | |
1da177e4 | 720 | urb = entry->urb; |
1da177e4 | 721 | |
0956a8c2 | 722 | /* |
723 | * Get reference count of the URB to avoid it to be | |
724 | * freed during usb_unlink_urb, which may trigger | |
725 | * use-after-free problem inside usb_unlink_urb since | |
726 | * usb_unlink_urb is always racing with .complete | |
727 | * handler(include defer_bh). | |
728 | */ | |
729 | usb_get_urb(urb); | |
4231d47e | 730 | spin_unlock_irqrestore(&q->lock, flags); |
1da177e4 LT |
731 | // during some PM-driven resume scenarios, |
732 | // these (async) unlinks complete immediately | |
733 | retval = usb_unlink_urb (urb); | |
734 | if (retval != -EINPROGRESS && retval != 0) | |
60b86755 | 735 | netdev_dbg(dev->net, "unlink urb err, %d\n", retval); |
1da177e4 LT |
736 | else |
737 | count++; | |
0956a8c2 | 738 | usb_put_urb(urb); |
4231d47e | 739 | spin_lock_irqsave(&q->lock, flags); |
1da177e4 LT |
740 | } |
741 | spin_unlock_irqrestore (&q->lock, flags); | |
742 | return count; | |
743 | } | |
744 | ||
a99c1949 JP |
745 | // Flush all pending rx urbs |
746 | // minidrivers may need to do this when the MTU changes | |
747 | ||
748 | void usbnet_unlink_rx_urbs(struct usbnet *dev) | |
749 | { | |
750 | if (netif_running(dev->net)) { | |
751 | (void) unlink_urbs (dev, &dev->rxq); | |
752 | tasklet_schedule(&dev->bh); | |
753 | } | |
754 | } | |
755 | EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs); | |
1da177e4 LT |
756 | |
757 | /*-------------------------------------------------------------------------*/ | |
758 | ||
fcb0bb6a ES |
759 | static void wait_skb_queue_empty(struct sk_buff_head *q) |
760 | { | |
761 | unsigned long flags; | |
762 | ||
763 | spin_lock_irqsave(&q->lock, flags); | |
764 | while (!skb_queue_empty(q)) { | |
765 | spin_unlock_irqrestore(&q->lock, flags); | |
766 | schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); | |
767 | set_current_state(TASK_UNINTERRUPTIBLE); | |
768 | spin_lock_irqsave(&q->lock, flags); | |
769 | } | |
770 | spin_unlock_irqrestore(&q->lock, flags); | |
771 | } | |
772 | ||
1da177e4 | 773 | // precondition: never called in_interrupt |
69ee472f ON |
774 | static void usbnet_terminate_urbs(struct usbnet *dev) |
775 | { | |
69ee472f ON |
776 | DECLARE_WAITQUEUE(wait, current); |
777 | int temp; | |
778 | ||
779 | /* ensure there are no more active urbs */ | |
14a0d635 | 780 | add_wait_queue(&dev->wait, &wait); |
69ee472f | 781 | set_current_state(TASK_UNINTERRUPTIBLE); |
69ee472f ON |
782 | temp = unlink_urbs(dev, &dev->txq) + |
783 | unlink_urbs(dev, &dev->rxq); | |
784 | ||
785 | /* maybe wait for deletions to finish. */ | |
fcb0bb6a ES |
786 | wait_skb_queue_empty(&dev->rxq); |
787 | wait_skb_queue_empty(&dev->txq); | |
788 | wait_skb_queue_empty(&dev->done); | |
789 | netif_dbg(dev, ifdown, dev->net, | |
790 | "waited for %d urb completions\n", temp); | |
69ee472f | 791 | set_current_state(TASK_RUNNING); |
14a0d635 | 792 | remove_wait_queue(&dev->wait, &wait); |
69ee472f | 793 | } |
1da177e4 | 794 | |
777baa47 | 795 | int usbnet_stop (struct net_device *net) |
1da177e4 LT |
796 | { |
797 | struct usbnet *dev = netdev_priv(net); | |
a33e9e7f | 798 | struct driver_info *info = dev->driver_info; |
f50791ac | 799 | int retval, pm, mpn; |
1da177e4 | 800 | |
75bd0cbd | 801 | clear_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 LT |
802 | netif_stop_queue (net); |
803 | ||
a475f603 | 804 | netif_info(dev, ifdown, dev->net, |
8ccef431 | 805 | "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", |
a475f603 JP |
806 | net->stats.rx_packets, net->stats.tx_packets, |
807 | net->stats.rx_errors, net->stats.tx_errors); | |
1da177e4 | 808 | |
14a0d635 ON |
809 | /* to not race resume */ |
810 | pm = usb_autopm_get_interface(dev->intf); | |
a33e9e7f JK |
811 | /* allow minidriver to stop correctly (wireless devices to turn off |
812 | * radio etc) */ | |
813 | if (info->stop) { | |
814 | retval = info->stop(dev); | |
a475f603 JP |
815 | if (retval < 0) |
816 | netif_info(dev, ifdown, dev->net, | |
817 | "stop fail (%d) usbnet usb-%s-%s, %s\n", | |
818 | retval, | |
819 | dev->udev->bus->bus_name, dev->udev->devpath, | |
820 | info->description); | |
a33e9e7f JK |
821 | } |
822 | ||
69ee472f ON |
823 | if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) |
824 | usbnet_terminate_urbs(dev); | |
1da177e4 | 825 | |
6eecdc5f | 826 | usbnet_status_stop(dev); |
1da177e4 | 827 | |
7834ddbc JK |
828 | usbnet_purge_paused_rxq(dev); |
829 | ||
f50791ac ES |
830 | mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags); |
831 | ||
1da177e4 LT |
832 | /* deferred work (task, timer, softirq) must also stop. |
833 | * can't flush_scheduled_work() until we drop rtnl (later), | |
834 | * else workers could deadlock; so make workers a NOP. | |
835 | */ | |
836 | dev->flags = 0; | |
837 | del_timer_sync (&dev->delay); | |
838 | tasklet_kill (&dev->bh); | |
14a0d635 ON |
839 | if (!pm) |
840 | usb_autopm_put_interface(dev->intf); | |
841 | ||
f50791ac | 842 | if (info->manage_power && mpn) |
69ee472f ON |
843 | info->manage_power(dev, 0); |
844 | else | |
845 | usb_autopm_put_interface(dev->intf); | |
1da177e4 LT |
846 | |
847 | return 0; | |
848 | } | |
777baa47 | 849 | EXPORT_SYMBOL_GPL(usbnet_stop); |
1da177e4 LT |
850 | |
851 | /*-------------------------------------------------------------------------*/ | |
852 | ||
853 | // posts reads, and enables write queuing | |
854 | ||
855 | // precondition: never called in_interrupt | |
856 | ||
777baa47 | 857 | int usbnet_open (struct net_device *net) |
1da177e4 LT |
858 | { |
859 | struct usbnet *dev = netdev_priv(net); | |
a11a6544 | 860 | int retval; |
1da177e4 LT |
861 | struct driver_info *info = dev->driver_info; |
862 | ||
a11a6544 | 863 | if ((retval = usb_autopm_get_interface(dev->intf)) < 0) { |
a475f603 JP |
864 | netif_info(dev, ifup, dev->net, |
865 | "resumption fail (%d) usbnet usb-%s-%s, %s\n", | |
866 | retval, | |
867 | dev->udev->bus->bus_name, | |
868 | dev->udev->devpath, | |
869 | info->description); | |
a11a6544 ON |
870 | goto done_nopm; |
871 | } | |
872 | ||
1da177e4 LT |
873 | // put into "known safe" state |
874 | if (info->reset && (retval = info->reset (dev)) < 0) { | |
a475f603 JP |
875 | netif_info(dev, ifup, dev->net, |
876 | "open reset fail (%d) usbnet usb-%s-%s, %s\n", | |
877 | retval, | |
878 | dev->udev->bus->bus_name, | |
879 | dev->udev->devpath, | |
880 | info->description); | |
1da177e4 LT |
881 | goto done; |
882 | } | |
883 | ||
a88c32ae ML |
884 | /* hard_mtu or rx_urb_size may change in reset() */ |
885 | usbnet_update_max_qlen(dev); | |
886 | ||
1da177e4 LT |
887 | // insist peer be connected |
888 | if (info->check_connect && (retval = info->check_connect (dev)) < 0) { | |
a475f603 | 889 | netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval); |
1da177e4 LT |
890 | goto done; |
891 | } | |
892 | ||
893 | /* start any status interrupt transfer */ | |
894 | if (dev->interrupt) { | |
6eecdc5f | 895 | retval = usbnet_status_start(dev, GFP_KERNEL); |
1da177e4 | 896 | if (retval < 0) { |
a475f603 JP |
897 | netif_err(dev, ifup, dev->net, |
898 | "intr submit %d\n", retval); | |
1da177e4 LT |
899 | goto done; |
900 | } | |
901 | } | |
902 | ||
68972efa | 903 | set_bit(EVENT_DEV_OPEN, &dev->flags); |
1da177e4 | 904 | netif_start_queue (net); |
a475f603 JP |
905 | netif_info(dev, ifup, dev->net, |
906 | "open: enable queueing (rx %d, tx %d) mtu %d %s framing\n", | |
907 | (int)RX_QLEN(dev), (int)TX_QLEN(dev), | |
908 | dev->net->mtu, | |
909 | (dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" : | |
910 | (dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" : | |
911 | (dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" : | |
912 | (dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" : | |
913 | (dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" : | |
914 | "simple"); | |
1da177e4 | 915 | |
70c37bf9 BM |
916 | /* reset rx error state */ |
917 | dev->pkt_cnt = 0; | |
918 | dev->pkt_err = 0; | |
919 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
920 | ||
1da177e4 LT |
921 | // delay posting reads until we're fully open |
922 | tasklet_schedule (&dev->bh); | |
69ee472f ON |
923 | if (info->manage_power) { |
924 | retval = info->manage_power(dev, 1); | |
a1c088e0 ON |
925 | if (retval < 0) { |
926 | retval = 0; | |
927 | set_bit(EVENT_NO_RUNTIME_PM, &dev->flags); | |
928 | } else { | |
929 | usb_autopm_put_interface(dev->intf); | |
930 | } | |
69ee472f | 931 | } |
a11a6544 | 932 | return retval; |
1da177e4 | 933 | done: |
a11a6544 ON |
934 | usb_autopm_put_interface(dev->intf); |
935 | done_nopm: | |
1da177e4 LT |
936 | return retval; |
937 | } | |
777baa47 | 938 | EXPORT_SYMBOL_GPL(usbnet_open); |
1da177e4 LT |
939 | |
940 | /*-------------------------------------------------------------------------*/ | |
941 | ||
2e55cc72 DB |
942 | /* ethtool methods; minidrivers may need to add some more, but |
943 | * they'll probably want to use this base set. | |
944 | */ | |
945 | ||
c41286fd AB |
946 | int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd) |
947 | { | |
948 | struct usbnet *dev = netdev_priv(net); | |
949 | ||
950 | if (!dev->mii.mdio_read) | |
951 | return -EOPNOTSUPP; | |
952 | ||
953 | return mii_ethtool_gset(&dev->mii, cmd); | |
954 | } | |
955 | EXPORT_SYMBOL_GPL(usbnet_get_settings); | |
956 | ||
957 | int usbnet_set_settings (struct net_device *net, struct ethtool_cmd *cmd) | |
958 | { | |
959 | struct usbnet *dev = netdev_priv(net); | |
960 | int retval; | |
961 | ||
962 | if (!dev->mii.mdio_write) | |
963 | return -EOPNOTSUPP; | |
964 | ||
965 | retval = mii_ethtool_sset(&dev->mii, cmd); | |
966 | ||
967 | /* link speed/duplex might have changed */ | |
968 | if (dev->driver_info->link_reset) | |
969 | dev->driver_info->link_reset(dev); | |
970 | ||
a88c32ae ML |
971 | /* hard_mtu or rx_urb_size may change in link_reset() */ |
972 | usbnet_update_max_qlen(dev); | |
973 | ||
c41286fd AB |
974 | return retval; |
975 | ||
976 | } | |
977 | EXPORT_SYMBOL_GPL(usbnet_set_settings); | |
978 | ||
c41286fd | 979 | u32 usbnet_get_link (struct net_device *net) |
1da177e4 LT |
980 | { |
981 | struct usbnet *dev = netdev_priv(net); | |
982 | ||
f29fc259 | 983 | /* If a check_connect is defined, return its result */ |
1da177e4 LT |
984 | if (dev->driver_info->check_connect) |
985 | return dev->driver_info->check_connect (dev) == 0; | |
986 | ||
c41286fd AB |
987 | /* if the device has mii operations, use those */ |
988 | if (dev->mii.mdio_read) | |
989 | return mii_link_ok(&dev->mii); | |
990 | ||
05ffb3e2 BM |
991 | /* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */ |
992 | return ethtool_op_get_link(net); | |
1da177e4 | 993 | } |
c41286fd | 994 | EXPORT_SYMBOL_GPL(usbnet_get_link); |
1da177e4 | 995 | |
18ee91fa | 996 | int usbnet_nway_reset(struct net_device *net) |
1da177e4 LT |
997 | { |
998 | struct usbnet *dev = netdev_priv(net); | |
999 | ||
18ee91fa DB |
1000 | if (!dev->mii.mdio_write) |
1001 | return -EOPNOTSUPP; | |
1002 | ||
1003 | return mii_nway_restart(&dev->mii); | |
1da177e4 | 1004 | } |
18ee91fa | 1005 | EXPORT_SYMBOL_GPL(usbnet_nway_reset); |
1da177e4 | 1006 | |
18ee91fa | 1007 | void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info) |
1da177e4 LT |
1008 | { |
1009 | struct usbnet *dev = netdev_priv(net); | |
1010 | ||
86a2f415 PS |
1011 | strlcpy (info->driver, dev->driver_name, sizeof info->driver); |
1012 | strlcpy (info->version, DRIVER_VERSION, sizeof info->version); | |
1013 | strlcpy (info->fw_version, dev->driver_info->description, | |
18ee91fa DB |
1014 | sizeof info->fw_version); |
1015 | usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info); | |
1da177e4 | 1016 | } |
18ee91fa | 1017 | EXPORT_SYMBOL_GPL(usbnet_get_drvinfo); |
1da177e4 | 1018 | |
18ee91fa | 1019 | u32 usbnet_get_msglevel (struct net_device *net) |
c41286fd AB |
1020 | { |
1021 | struct usbnet *dev = netdev_priv(net); | |
1022 | ||
18ee91fa DB |
1023 | return dev->msg_enable; |
1024 | } | |
1025 | EXPORT_SYMBOL_GPL(usbnet_get_msglevel); | |
c41286fd | 1026 | |
18ee91fa DB |
1027 | void usbnet_set_msglevel (struct net_device *net, u32 level) |
1028 | { | |
1029 | struct usbnet *dev = netdev_priv(net); | |
1030 | ||
1031 | dev->msg_enable = level; | |
c41286fd | 1032 | } |
18ee91fa | 1033 | EXPORT_SYMBOL_GPL(usbnet_set_msglevel); |
c41286fd | 1034 | |
2e55cc72 | 1035 | /* drivers may override default ethtool_ops in their bind() routine */ |
0fc0b732 | 1036 | static const struct ethtool_ops usbnet_ethtool_ops = { |
c41286fd AB |
1037 | .get_settings = usbnet_get_settings, |
1038 | .set_settings = usbnet_set_settings, | |
2e55cc72 | 1039 | .get_link = usbnet_get_link, |
c41286fd | 1040 | .nway_reset = usbnet_nway_reset, |
18ee91fa | 1041 | .get_drvinfo = usbnet_get_drvinfo, |
2e55cc72 DB |
1042 | .get_msglevel = usbnet_get_msglevel, |
1043 | .set_msglevel = usbnet_set_msglevel, | |
123edb18 | 1044 | .get_ts_info = ethtool_op_get_ts_info, |
2e55cc72 | 1045 | }; |
1da177e4 LT |
1046 | |
1047 | /*-------------------------------------------------------------------------*/ | |
1048 | ||
4b49f58f ML |
1049 | static void __handle_link_change(struct usbnet *dev) |
1050 | { | |
1051 | if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) | |
1052 | return; | |
1053 | ||
1054 | if (!netif_carrier_ok(dev->net)) { | |
1055 | /* kill URBs for reading packets to save bus bandwidth */ | |
1056 | unlink_urbs(dev, &dev->rxq); | |
1057 | ||
1058 | /* | |
1059 | * tx_timeout will unlink URBs for sending packets and | |
1060 | * tx queue is stopped by netcore after link becomes off | |
1061 | */ | |
1062 | } else { | |
1063 | /* submitting URBs for reading packets */ | |
1064 | tasklet_schedule(&dev->bh); | |
1065 | } | |
1066 | ||
a88c32ae ML |
1067 | /* hard_mtu or rx_urb_size may change during link change */ |
1068 | usbnet_update_max_qlen(dev); | |
1069 | ||
4b49f58f ML |
1070 | clear_bit(EVENT_LINK_CHANGE, &dev->flags); |
1071 | } | |
1072 | ||
1efed2d0 OB |
1073 | static void usbnet_set_rx_mode(struct net_device *net) |
1074 | { | |
1075 | struct usbnet *dev = netdev_priv(net); | |
1076 | ||
1077 | usbnet_defer_kevent(dev, EVENT_SET_RX_MODE); | |
1078 | } | |
1079 | ||
1080 | static void __handle_set_rx_mode(struct usbnet *dev) | |
1081 | { | |
1082 | if (dev->driver_info->set_rx_mode) | |
1083 | (dev->driver_info->set_rx_mode)(dev); | |
1084 | ||
1085 | clear_bit(EVENT_SET_RX_MODE, &dev->flags); | |
1086 | } | |
1087 | ||
1da177e4 LT |
1088 | /* work that cannot be done in interrupt context uses keventd. |
1089 | * | |
1090 | * NOTE: with 2.5 we could do more of this using completion callbacks, | |
1091 | * especially now that control transfers can be queued. | |
1092 | */ | |
1093 | static void | |
11f17ef3 | 1094 | usbnet_deferred_kevent (struct work_struct *work) |
1da177e4 | 1095 | { |
c4028958 DH |
1096 | struct usbnet *dev = |
1097 | container_of(work, struct usbnet, kevent); | |
1da177e4 LT |
1098 | int status; |
1099 | ||
1100 | /* usb_clear_halt() needs a thread context */ | |
1101 | if (test_bit (EVENT_TX_HALT, &dev->flags)) { | |
1102 | unlink_urbs (dev, &dev->txq); | |
69ee472f ON |
1103 | status = usb_autopm_get_interface(dev->intf); |
1104 | if (status < 0) | |
1105 | goto fail_pipe; | |
1da177e4 | 1106 | status = usb_clear_halt (dev->udev, dev->out); |
69ee472f | 1107 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1108 | if (status < 0 && |
1109 | status != -EPIPE && | |
1110 | status != -ESHUTDOWN) { | |
1da177e4 | 1111 | if (netif_msg_tx_err (dev)) |
69ee472f | 1112 | fail_pipe: |
60b86755 JP |
1113 | netdev_err(dev->net, "can't clear tx halt, status %d\n", |
1114 | status); | |
1da177e4 LT |
1115 | } else { |
1116 | clear_bit (EVENT_TX_HALT, &dev->flags); | |
f29fc259 DB |
1117 | if (status != -ESHUTDOWN) |
1118 | netif_wake_queue (dev->net); | |
1da177e4 LT |
1119 | } |
1120 | } | |
1121 | if (test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1122 | unlink_urbs (dev, &dev->rxq); | |
69ee472f ON |
1123 | status = usb_autopm_get_interface(dev->intf); |
1124 | if (status < 0) | |
1125 | goto fail_halt; | |
1da177e4 | 1126 | status = usb_clear_halt (dev->udev, dev->in); |
69ee472f | 1127 | usb_autopm_put_interface(dev->intf); |
8e95a202 JP |
1128 | if (status < 0 && |
1129 | status != -EPIPE && | |
1130 | status != -ESHUTDOWN) { | |
1da177e4 | 1131 | if (netif_msg_rx_err (dev)) |
69ee472f | 1132 | fail_halt: |
60b86755 JP |
1133 | netdev_err(dev->net, "can't clear rx halt, status %d\n", |
1134 | status); | |
1da177e4 LT |
1135 | } else { |
1136 | clear_bit (EVENT_RX_HALT, &dev->flags); | |
1137 | tasklet_schedule (&dev->bh); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* tasklet could resubmit itself forever if memory is tight */ | |
1142 | if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { | |
1143 | struct urb *urb = NULL; | |
dacb3975 | 1144 | int resched = 1; |
1da177e4 LT |
1145 | |
1146 | if (netif_running (dev->net)) | |
1147 | urb = usb_alloc_urb (0, GFP_KERNEL); | |
1148 | else | |
1149 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
1150 | if (urb != NULL) { | |
1151 | clear_bit (EVENT_RX_MEMORY, &dev->flags); | |
69ee472f | 1152 | status = usb_autopm_get_interface(dev->intf); |
ab60707f JJ |
1153 | if (status < 0) { |
1154 | usb_free_urb(urb); | |
69ee472f | 1155 | goto fail_lowmem; |
ab60707f | 1156 | } |
dacb3975 DM |
1157 | if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) |
1158 | resched = 0; | |
69ee472f ON |
1159 | usb_autopm_put_interface(dev->intf); |
1160 | fail_lowmem: | |
dacb3975 DM |
1161 | if (resched) |
1162 | tasklet_schedule (&dev->bh); | |
1da177e4 LT |
1163 | } |
1164 | } | |
1165 | ||
7ea13c9c | 1166 | if (test_bit (EVENT_LINK_RESET, &dev->flags)) { |
cb1cebbe | 1167 | struct driver_info *info = dev->driver_info; |
7ea13c9c DH |
1168 | int retval = 0; |
1169 | ||
1170 | clear_bit (EVENT_LINK_RESET, &dev->flags); | |
69ee472f ON |
1171 | status = usb_autopm_get_interface(dev->intf); |
1172 | if (status < 0) | |
1173 | goto skip_reset; | |
7ea13c9c | 1174 | if(info->link_reset && (retval = info->link_reset(dev)) < 0) { |
69ee472f ON |
1175 | usb_autopm_put_interface(dev->intf); |
1176 | skip_reset: | |
60b86755 JP |
1177 | netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", |
1178 | retval, | |
1179 | dev->udev->bus->bus_name, | |
1180 | dev->udev->devpath, | |
1181 | info->description); | |
69ee472f ON |
1182 | } else { |
1183 | usb_autopm_put_interface(dev->intf); | |
7ea13c9c | 1184 | } |
4b49f58f ML |
1185 | |
1186 | /* handle link change from link resetting */ | |
1187 | __handle_link_change(dev); | |
7ea13c9c DH |
1188 | } |
1189 | ||
4b49f58f ML |
1190 | if (test_bit (EVENT_LINK_CHANGE, &dev->flags)) |
1191 | __handle_link_change(dev); | |
1192 | ||
1efed2d0 OB |
1193 | if (test_bit (EVENT_SET_RX_MODE, &dev->flags)) |
1194 | __handle_set_rx_mode(dev); | |
1195 | ||
1196 | ||
1da177e4 | 1197 | if (dev->flags) |
60b86755 | 1198 | netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | /*-------------------------------------------------------------------------*/ | |
1202 | ||
7d12e780 | 1203 | static void tx_complete (struct urb *urb) |
1da177e4 LT |
1204 | { |
1205 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1206 | struct skb_data *entry = (struct skb_data *) skb->cb; | |
1207 | struct usbnet *dev = entry->dev; | |
1208 | ||
1209 | if (urb->status == 0) { | |
1e9e39f4 | 1210 | dev->net->stats.tx_packets += entry->packets; |
7963837f | 1211 | dev->net->stats.tx_bytes += entry->length; |
1da177e4 | 1212 | } else { |
7963837f | 1213 | dev->net->stats.tx_errors++; |
1da177e4 LT |
1214 | |
1215 | switch (urb->status) { | |
1216 | case -EPIPE: | |
2e55cc72 | 1217 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
1da177e4 LT |
1218 | break; |
1219 | ||
1220 | /* software-driven interface shutdown */ | |
1221 | case -ECONNRESET: // async unlink | |
1222 | case -ESHUTDOWN: // hardware gone | |
1223 | break; | |
1224 | ||
37ebb549 PM |
1225 | /* like rx, tx gets controller i/o faults during hub_wq |
1226 | * delays and so it uses the same throttling mechanism. | |
1227 | */ | |
38e2bfc9 PZ |
1228 | case -EPROTO: |
1229 | case -ETIME: | |
1230 | case -EILSEQ: | |
69ee472f | 1231 | usb_mark_last_busy(dev->udev); |
1da177e4 LT |
1232 | if (!timer_pending (&dev->delay)) { |
1233 | mod_timer (&dev->delay, | |
1234 | jiffies + THROTTLE_JIFFIES); | |
a475f603 JP |
1235 | netif_dbg(dev, link, dev->net, |
1236 | "tx throttle %d\n", urb->status); | |
1da177e4 LT |
1237 | } |
1238 | netif_stop_queue (dev->net); | |
1239 | break; | |
1240 | default: | |
a475f603 JP |
1241 | netif_dbg(dev, tx_err, dev->net, |
1242 | "tx err %d\n", entry->urb->status); | |
1da177e4 LT |
1243 | break; |
1244 | } | |
1245 | } | |
1246 | ||
69ee472f | 1247 | usb_autopm_put_interface_async(dev->intf); |
5b6e9bcd | 1248 | (void) defer_bh(dev, skb, &dev->txq, tx_done); |
1da177e4 LT |
1249 | } |
1250 | ||
1251 | /*-------------------------------------------------------------------------*/ | |
1252 | ||
777baa47 | 1253 | void usbnet_tx_timeout (struct net_device *net) |
1da177e4 LT |
1254 | { |
1255 | struct usbnet *dev = netdev_priv(net); | |
1256 | ||
1257 | unlink_urbs (dev, &dev->txq); | |
1258 | tasklet_schedule (&dev->bh); | |
dbcdd4d5 ON |
1259 | /* this needs to be handled individually because the generic layer |
1260 | * doesn't know what is sufficient and could not restore private | |
1261 | * information if a remedy of an unconditional reset were used. | |
1262 | */ | |
1263 | if (dev->driver_info->recover) | |
1264 | (dev->driver_info->recover)(dev); | |
1da177e4 | 1265 | } |
777baa47 | 1266 | EXPORT_SYMBOL_GPL(usbnet_tx_timeout); |
1da177e4 LT |
1267 | |
1268 | /*-------------------------------------------------------------------------*/ | |
1269 | ||
638c5115 ML |
1270 | static int build_dma_sg(const struct sk_buff *skb, struct urb *urb) |
1271 | { | |
1272 | unsigned num_sgs, total_len = 0; | |
1273 | int i, s = 0; | |
1274 | ||
1275 | num_sgs = skb_shinfo(skb)->nr_frags + 1; | |
1276 | if (num_sgs == 1) | |
1277 | return 0; | |
1278 | ||
60e453a9 ML |
1279 | /* reserve one for zero packet */ |
1280 | urb->sg = kmalloc((num_sgs + 1) * sizeof(struct scatterlist), | |
1281 | GFP_ATOMIC); | |
638c5115 ML |
1282 | if (!urb->sg) |
1283 | return -ENOMEM; | |
1284 | ||
1285 | urb->num_sgs = num_sgs; | |
fdc3452c | 1286 | sg_init_table(urb->sg, urb->num_sgs + 1); |
638c5115 ML |
1287 | |
1288 | sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb)); | |
1289 | total_len += skb_headlen(skb); | |
1290 | ||
1291 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1292 | struct skb_frag_struct *f = &skb_shinfo(skb)->frags[i]; | |
1293 | ||
1294 | total_len += skb_frag_size(f); | |
1295 | sg_set_page(&urb->sg[i + s], f->page.p, f->size, | |
1296 | f->page_offset); | |
1297 | } | |
1298 | urb->transfer_buffer_length = total_len; | |
1299 | ||
1300 | return 1; | |
1301 | } | |
1302 | ||
25a79c41 SH |
1303 | netdev_tx_t usbnet_start_xmit (struct sk_buff *skb, |
1304 | struct net_device *net) | |
1da177e4 LT |
1305 | { |
1306 | struct usbnet *dev = netdev_priv(net); | |
3e4336a6 | 1307 | unsigned int length; |
1da177e4 LT |
1308 | struct urb *urb = NULL; |
1309 | struct skb_data *entry; | |
1310 | struct driver_info *info = dev->driver_info; | |
1311 | unsigned long flags; | |
25a79c41 | 1312 | int retval; |
1da177e4 | 1313 | |
23ba0799 KK |
1314 | if (skb) |
1315 | skb_tx_timestamp(skb); | |
f9b491ec | 1316 | |
1da177e4 LT |
1317 | // some devices want funky USB-level framing, for |
1318 | // win32 driver (usually) and/or hardware quirks | |
1319 | if (info->tx_fixup) { | |
1320 | skb = info->tx_fixup (dev, skb, GFP_ATOMIC); | |
1321 | if (!skb) { | |
bf414b36 BM |
1322 | /* packet collected; minidriver waiting for more */ |
1323 | if (info->flags & FLAG_MULTI_PACKET) | |
073285fd | 1324 | goto not_drop; |
bf414b36 BM |
1325 | netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n"); |
1326 | goto drop; | |
1da177e4 LT |
1327 | } |
1328 | } | |
1da177e4 LT |
1329 | |
1330 | if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) { | |
a475f603 | 1331 | netif_dbg(dev, tx_err, dev->net, "no urb\n"); |
1da177e4 LT |
1332 | goto drop; |
1333 | } | |
1334 | ||
1335 | entry = (struct skb_data *) skb->cb; | |
1336 | entry->urb = urb; | |
1337 | entry->dev = dev; | |
1da177e4 | 1338 | |
1da177e4 LT |
1339 | usb_fill_bulk_urb (urb, dev->udev, dev->out, |
1340 | skb->data, skb->len, tx_complete, skb); | |
638c5115 ML |
1341 | if (dev->can_dma_sg) { |
1342 | if (build_dma_sg(skb, urb) < 0) | |
1343 | goto drop; | |
1344 | } | |
60e453a9 | 1345 | length = urb->transfer_buffer_length; |
1da177e4 LT |
1346 | |
1347 | /* don't assume the hardware handles USB_ZERO_PACKET | |
1348 | * NOTE: strictly conforming cdc-ether devices should expect | |
1349 | * the ZLP here, but ignore the one-byte packet. | |
073285fd AO |
1350 | * NOTE2: CDC NCM specification is different from CDC ECM when |
1351 | * handling ZLP/short packets, so cdc_ncm driver will make short | |
1352 | * packet itself if needed. | |
1da177e4 | 1353 | */ |
b4d562e3 EP |
1354 | if (length % dev->maxpacket == 0) { |
1355 | if (!(info->flags & FLAG_SEND_ZLP)) { | |
073285fd | 1356 | if (!(info->flags & FLAG_MULTI_PACKET)) { |
60e453a9 ML |
1357 | length++; |
1358 | if (skb_tailroom(skb) && !urb->num_sgs) { | |
073285fd AO |
1359 | skb->data[skb->len] = 0; |
1360 | __skb_put(skb, 1); | |
60e453a9 ML |
1361 | } else if (urb->num_sgs) |
1362 | sg_set_buf(&urb->sg[urb->num_sgs++], | |
1363 | dev->padding_pkt, 1); | |
b4d562e3 EP |
1364 | } |
1365 | } else | |
1366 | urb->transfer_flags |= URB_ZERO_PACKET; | |
3e323f3e | 1367 | } |
7a1e890e BH |
1368 | urb->transfer_buffer_length = length; |
1369 | ||
1370 | if (info->flags & FLAG_MULTI_PACKET) { | |
1371 | /* Driver has set number of packets and a length delta. | |
1372 | * Calculate the complete length and ensure that it's | |
1373 | * positive. | |
1374 | */ | |
1375 | entry->length += length; | |
1376 | if (WARN_ON_ONCE(entry->length <= 0)) | |
1377 | entry->length = length; | |
1378 | } else { | |
1379 | usbnet_set_skb_tx_stats(skb, 1, length); | |
1380 | } | |
1da177e4 | 1381 | |
69ee472f ON |
1382 | spin_lock_irqsave(&dev->txq.lock, flags); |
1383 | retval = usb_autopm_get_interface_async(dev->intf); | |
1384 | if (retval < 0) { | |
1385 | spin_unlock_irqrestore(&dev->txq.lock, flags); | |
1386 | goto drop; | |
1387 | } | |
1388 | ||
1389 | #ifdef CONFIG_PM | |
1390 | /* if this triggers the device is still a sleep */ | |
1391 | if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { | |
1392 | /* transmission will be done in resume */ | |
1393 | usb_anchor_urb(urb, &dev->deferred); | |
1394 | /* no use to process more packets */ | |
1395 | netif_stop_queue(net); | |
39707c2a | 1396 | usb_put_urb(urb); |
69ee472f | 1397 | spin_unlock_irqrestore(&dev->txq.lock, flags); |
60b86755 | 1398 | netdev_dbg(dev->net, "Delaying transmission for resumption\n"); |
69ee472f ON |
1399 | goto deferred; |
1400 | } | |
1401 | #endif | |
1da177e4 | 1402 | |
1da177e4 LT |
1403 | switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) { |
1404 | case -EPIPE: | |
1405 | netif_stop_queue (net); | |
2e55cc72 | 1406 | usbnet_defer_kevent (dev, EVENT_TX_HALT); |
69ee472f | 1407 | usb_autopm_put_interface_async(dev->intf); |
1da177e4 LT |
1408 | break; |
1409 | default: | |
69ee472f | 1410 | usb_autopm_put_interface_async(dev->intf); |
a475f603 JP |
1411 | netif_dbg(dev, tx_err, dev->net, |
1412 | "tx: submit urb err %d\n", retval); | |
1da177e4 LT |
1413 | break; |
1414 | case 0: | |
1415 | net->trans_start = jiffies; | |
5b6e9bcd | 1416 | __usbnet_queue_skb(&dev->txq, skb, tx_start); |
1da177e4 LT |
1417 | if (dev->txq.qlen >= TX_QLEN (dev)) |
1418 | netif_stop_queue (net); | |
1419 | } | |
1420 | spin_unlock_irqrestore (&dev->txq.lock, flags); | |
1421 | ||
1422 | if (retval) { | |
a475f603 | 1423 | netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval); |
1da177e4 | 1424 | drop: |
7963837f | 1425 | dev->net->stats.tx_dropped++; |
073285fd | 1426 | not_drop: |
1da177e4 LT |
1427 | if (skb) |
1428 | dev_kfree_skb_any (skb); | |
638c5115 ML |
1429 | if (urb) { |
1430 | kfree(urb->sg); | |
1431 | usb_free_urb(urb); | |
1432 | } | |
a475f603 JP |
1433 | } else |
1434 | netif_dbg(dev, tx_queued, dev->net, | |
3e4336a6 | 1435 | "> tx, len %u, type 0x%x\n", length, skb->protocol); |
69ee472f ON |
1436 | #ifdef CONFIG_PM |
1437 | deferred: | |
1438 | #endif | |
25a79c41 | 1439 | return NETDEV_TX_OK; |
1da177e4 | 1440 | } |
777baa47 | 1441 | EXPORT_SYMBOL_GPL(usbnet_start_xmit); |
1da177e4 | 1442 | |
85e87870 | 1443 | static int rx_alloc_submit(struct usbnet *dev, gfp_t flags) |
65841fd5 ML |
1444 | { |
1445 | struct urb *urb; | |
1446 | int i; | |
85e87870 | 1447 | int ret = 0; |
65841fd5 ML |
1448 | |
1449 | /* don't refill the queue all at once */ | |
1450 | for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) { | |
1451 | urb = usb_alloc_urb(0, flags); | |
1452 | if (urb != NULL) { | |
85e87870 BM |
1453 | ret = rx_submit(dev, urb, flags); |
1454 | if (ret) | |
1455 | goto err; | |
1456 | } else { | |
1457 | ret = -ENOMEM; | |
1458 | goto err; | |
65841fd5 ML |
1459 | } |
1460 | } | |
85e87870 BM |
1461 | err: |
1462 | return ret; | |
65841fd5 ML |
1463 | } |
1464 | ||
1da177e4 LT |
1465 | /*-------------------------------------------------------------------------*/ |
1466 | ||
1467 | // tasklet (work deferred from completions, in_irq) or timer | |
1468 | ||
1469 | static void usbnet_bh (unsigned long param) | |
1470 | { | |
1471 | struct usbnet *dev = (struct usbnet *) param; | |
1472 | struct sk_buff *skb; | |
1473 | struct skb_data *entry; | |
1474 | ||
1475 | while ((skb = skb_dequeue (&dev->done))) { | |
1476 | entry = (struct skb_data *) skb->cb; | |
1477 | switch (entry->state) { | |
18ab458f | 1478 | case rx_done: |
1da177e4 LT |
1479 | entry->state = rx_cleanup; |
1480 | rx_process (dev, skb); | |
1481 | continue; | |
18ab458f | 1482 | case tx_done: |
638c5115 | 1483 | kfree(entry->urb->sg); |
18ab458f | 1484 | case rx_cleanup: |
1da177e4 LT |
1485 | usb_free_urb (entry->urb); |
1486 | dev_kfree_skb (skb); | |
1487 | continue; | |
18ab458f | 1488 | default: |
60b86755 | 1489 | netdev_dbg(dev->net, "bogus skb state %d\n", entry->state); |
1da177e4 LT |
1490 | } |
1491 | } | |
1492 | ||
70c37bf9 BM |
1493 | /* restart RX again after disabling due to high error rate */ |
1494 | clear_bit(EVENT_RX_KILL, &dev->flags); | |
1495 | ||
14a0d635 ON |
1496 | /* waiting for all pending urbs to complete? |
1497 | * only then can we forgo submitting anew | |
1498 | */ | |
1499 | if (waitqueue_active(&dev->wait)) { | |
1500 | if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0) | |
1501 | wake_up_all(&dev->wait); | |
1da177e4 LT |
1502 | |
1503 | // or are we maybe short a few urbs? | |
8e95a202 JP |
1504 | } else if (netif_running (dev->net) && |
1505 | netif_device_present (dev->net) && | |
4b49f58f | 1506 | netif_carrier_ok(dev->net) && |
8e95a202 JP |
1507 | !timer_pending (&dev->delay) && |
1508 | !test_bit (EVENT_RX_HALT, &dev->flags)) { | |
1da177e4 | 1509 | int temp = dev->rxq.qlen; |
65841fd5 ML |
1510 | |
1511 | if (temp < RX_QLEN(dev)) { | |
85e87870 BM |
1512 | if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK) |
1513 | return; | |
a475f603 JP |
1514 | if (temp != dev->rxq.qlen) |
1515 | netif_dbg(dev, link, dev->net, | |
1516 | "rxqlen %d --> %d\n", | |
1517 | temp, dev->rxq.qlen); | |
65841fd5 | 1518 | if (dev->rxq.qlen < RX_QLEN(dev)) |
1da177e4 LT |
1519 | tasklet_schedule (&dev->bh); |
1520 | } | |
1521 | if (dev->txq.qlen < TX_QLEN (dev)) | |
1522 | netif_wake_queue (dev->net); | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | ||
1da177e4 LT |
1527 | /*------------------------------------------------------------------------- |
1528 | * | |
1529 | * USB Device Driver support | |
1530 | * | |
1531 | *-------------------------------------------------------------------------*/ | |
cb1cebbe | 1532 | |
1da177e4 LT |
1533 | // precondition: never called in_interrupt |
1534 | ||
38bde1d4 | 1535 | void usbnet_disconnect (struct usb_interface *intf) |
1da177e4 LT |
1536 | { |
1537 | struct usbnet *dev; | |
1538 | struct usb_device *xdev; | |
1539 | struct net_device *net; | |
1540 | ||
1541 | dev = usb_get_intfdata(intf); | |
1542 | usb_set_intfdata(intf, NULL); | |
1543 | if (!dev) | |
1544 | return; | |
1545 | ||
1546 | xdev = interface_to_usbdev (intf); | |
1547 | ||
a475f603 JP |
1548 | netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n", |
1549 | intf->dev.driver->name, | |
1550 | xdev->bus->bus_name, xdev->devpath, | |
1551 | dev->driver_info->description); | |
cb1cebbe | 1552 | |
1da177e4 LT |
1553 | net = dev->net; |
1554 | unregister_netdev (net); | |
1555 | ||
23f333a2 | 1556 | cancel_work_sync(&dev->kevent); |
1da177e4 | 1557 | |
39707c2a HK |
1558 | usb_scuttle_anchored_urbs(&dev->deferred); |
1559 | ||
1da177e4 LT |
1560 | if (dev->driver_info->unbind) |
1561 | dev->driver_info->unbind (dev, intf); | |
1562 | ||
68972efa PS |
1563 | usb_kill_urb(dev->interrupt); |
1564 | usb_free_urb(dev->interrupt); | |
60e453a9 | 1565 | kfree(dev->padding_pkt); |
68972efa | 1566 | |
1da177e4 | 1567 | free_netdev(net); |
1da177e4 | 1568 | } |
38bde1d4 | 1569 | EXPORT_SYMBOL_GPL(usbnet_disconnect); |
1da177e4 | 1570 | |
777baa47 SH |
1571 | static const struct net_device_ops usbnet_netdev_ops = { |
1572 | .ndo_open = usbnet_open, | |
1573 | .ndo_stop = usbnet_stop, | |
1574 | .ndo_start_xmit = usbnet_start_xmit, | |
1575 | .ndo_tx_timeout = usbnet_tx_timeout, | |
1efed2d0 | 1576 | .ndo_set_rx_mode = usbnet_set_rx_mode, |
777baa47 SH |
1577 | .ndo_change_mtu = usbnet_change_mtu, |
1578 | .ndo_set_mac_address = eth_mac_addr, | |
1579 | .ndo_validate_addr = eth_validate_addr, | |
1580 | }; | |
1da177e4 LT |
1581 | |
1582 | /*-------------------------------------------------------------------------*/ | |
1583 | ||
1da177e4 LT |
1584 | // precondition: never called in_interrupt |
1585 | ||
225794f8 MH |
1586 | static struct device_type wlan_type = { |
1587 | .name = "wlan", | |
1588 | }; | |
1589 | ||
1590 | static struct device_type wwan_type = { | |
1591 | .name = "wwan", | |
1592 | }; | |
1593 | ||
38bde1d4 | 1594 | int |
1da177e4 LT |
1595 | usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) |
1596 | { | |
1597 | struct usbnet *dev; | |
cb1cebbe | 1598 | struct net_device *net; |
1da177e4 LT |
1599 | struct usb_host_interface *interface; |
1600 | struct driver_info *info; | |
1601 | struct usb_device *xdev; | |
1602 | int status; | |
296c0242 | 1603 | const char *name; |
b0786b43 ML |
1604 | struct usb_driver *driver = to_usb_driver(udev->dev.driver); |
1605 | ||
1606 | /* usbnet already took usb runtime pm, so have to enable the feature | |
1607 | * for usb interface, otherwise usb_autopm_get_interface may return | |
98f541c6 | 1608 | * failure if RUNTIME_PM is enabled. |
b0786b43 ML |
1609 | */ |
1610 | if (!driver->supports_autosuspend) { | |
1611 | driver->supports_autosuspend = 1; | |
1612 | pm_runtime_enable(&udev->dev); | |
1613 | } | |
1da177e4 | 1614 | |
296c0242 | 1615 | name = udev->dev.driver->name; |
1da177e4 LT |
1616 | info = (struct driver_info *) prod->driver_info; |
1617 | if (!info) { | |
296c0242 | 1618 | dev_dbg (&udev->dev, "blacklisted by %s\n", name); |
1da177e4 LT |
1619 | return -ENODEV; |
1620 | } | |
1621 | xdev = interface_to_usbdev (udev); | |
1622 | interface = udev->cur_altsetting; | |
1623 | ||
1da177e4 LT |
1624 | status = -ENOMEM; |
1625 | ||
1626 | // set up our own records | |
1627 | net = alloc_etherdev(sizeof(*dev)); | |
41de8d4c | 1628 | if (!net) |
1da177e4 | 1629 | goto out; |
1da177e4 | 1630 | |
0dacca73 BH |
1631 | /* netdev_printk() needs this so do it as early as possible */ |
1632 | SET_NETDEV_DEV(net, &udev->dev); | |
1633 | ||
1da177e4 LT |
1634 | dev = netdev_priv(net); |
1635 | dev->udev = xdev; | |
a11a6544 | 1636 | dev->intf = udev; |
1da177e4 | 1637 | dev->driver_info = info; |
296c0242 | 1638 | dev->driver_name = name; |
1da177e4 LT |
1639 | dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV |
1640 | | NETIF_MSG_PROBE | NETIF_MSG_LINK); | |
14a0d635 | 1641 | init_waitqueue_head(&dev->wait); |
1da177e4 LT |
1642 | skb_queue_head_init (&dev->rxq); |
1643 | skb_queue_head_init (&dev->txq); | |
1644 | skb_queue_head_init (&dev->done); | |
7834ddbc | 1645 | skb_queue_head_init(&dev->rxq_pause); |
1da177e4 LT |
1646 | dev->bh.func = usbnet_bh; |
1647 | dev->bh.data = (unsigned long) dev; | |
11f17ef3 | 1648 | INIT_WORK (&dev->kevent, usbnet_deferred_kevent); |
69ee472f | 1649 | init_usb_anchor(&dev->deferred); |
1da177e4 LT |
1650 | dev->delay.function = usbnet_bh; |
1651 | dev->delay.data = (unsigned long) dev; | |
1652 | init_timer (&dev->delay); | |
a9fc6338 | 1653 | mutex_init (&dev->phy_mutex); |
6eecdc5f DW |
1654 | mutex_init(&dev->interrupt_mutex); |
1655 | dev->interrupt_count = 0; | |
1da177e4 | 1656 | |
1da177e4 LT |
1657 | dev->net = net; |
1658 | strcpy (net->name, "usb%d"); | |
1659 | memcpy (net->dev_addr, node_id, sizeof node_id); | |
1660 | ||
2e55cc72 DB |
1661 | /* rx and tx sides can use different message sizes; |
1662 | * bind() should set rx_urb_size in that case. | |
1663 | */ | |
1664 | dev->hard_mtu = net->mtu + net->hard_header_len; | |
1da177e4 | 1665 | |
777baa47 | 1666 | net->netdev_ops = &usbnet_netdev_ops; |
777baa47 | 1667 | net->watchdog_timeo = TX_TIMEOUT_JIFFIES; |
1da177e4 LT |
1668 | net->ethtool_ops = &usbnet_ethtool_ops; |
1669 | ||
1670 | // allow device-specific bind/init procedures | |
1671 | // NOTE net->name still not usable ... | |
1672 | if (info->bind) { | |
1673 | status = info->bind (dev, udev); | |
cb1cebbe DB |
1674 | if (status < 0) |
1675 | goto out1; | |
1676 | ||
1da177e4 LT |
1677 | // heuristic: "usb%d" for links we know are two-host, |
1678 | // else "eth%d" when there's reasonable doubt. userspace | |
1679 | // can rename the link if it knows better. | |
8e95a202 | 1680 | if ((dev->driver_info->flags & FLAG_ETHER) != 0 && |
c261344d AB |
1681 | ((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 || |
1682 | (net->dev_addr [0] & 0x02) == 0)) | |
1da177e4 | 1683 | strcpy (net->name, "eth%d"); |
6e3bbcc5 JK |
1684 | /* WLAN devices should always be named "wlan%d" */ |
1685 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) | |
1686 | strcpy(net->name, "wlan%d"); | |
e1e499ee MH |
1687 | /* WWAN devices should always be named "wwan%d" */ |
1688 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1689 | strcpy(net->name, "wwan%d"); | |
f29fc259 | 1690 | |
6509141f WS |
1691 | /* devices that cannot do ARP */ |
1692 | if ((dev->driver_info->flags & FLAG_NOARP) != 0) | |
1693 | net->flags |= IFF_NOARP; | |
1694 | ||
f29fc259 DB |
1695 | /* maybe the remote can't receive an Ethernet MTU */ |
1696 | if (net->mtu > (dev->hard_mtu - net->hard_header_len)) | |
1697 | net->mtu = dev->hard_mtu - net->hard_header_len; | |
2e55cc72 DB |
1698 | } else if (!info->in || !info->out) |
1699 | status = usbnet_get_endpoints (dev, udev); | |
1da177e4 LT |
1700 | else { |
1701 | dev->in = usb_rcvbulkpipe (xdev, info->in); | |
1702 | dev->out = usb_sndbulkpipe (xdev, info->out); | |
1703 | if (!(info->flags & FLAG_NO_SETINT)) | |
1704 | status = usb_set_interface (xdev, | |
1705 | interface->desc.bInterfaceNumber, | |
1706 | interface->desc.bAlternateSetting); | |
1707 | else | |
1708 | status = 0; | |
1709 | ||
1710 | } | |
9514bfe5 | 1711 | if (status >= 0 && dev->status) |
1da177e4 LT |
1712 | status = init_status (dev, udev); |
1713 | if (status < 0) | |
cb1cebbe | 1714 | goto out3; |
1da177e4 | 1715 | |
2e55cc72 DB |
1716 | if (!dev->rx_urb_size) |
1717 | dev->rx_urb_size = dev->hard_mtu; | |
1da177e4 | 1718 | dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); |
cb1cebbe | 1719 | |
eef23b53 BM |
1720 | /* let userspace know we have a random address */ |
1721 | if (ether_addr_equal(net->dev_addr, node_id)) | |
1722 | net->addr_assign_type = NET_ADDR_RANDOM; | |
1723 | ||
225794f8 MH |
1724 | if ((dev->driver_info->flags & FLAG_WLAN) != 0) |
1725 | SET_NETDEV_DEVTYPE(net, &wlan_type); | |
1726 | if ((dev->driver_info->flags & FLAG_WWAN) != 0) | |
1727 | SET_NETDEV_DEVTYPE(net, &wwan_type); | |
1728 | ||
a88c32ae ML |
1729 | /* initialize max rx_qlen and tx_qlen */ |
1730 | usbnet_update_max_qlen(dev); | |
1731 | ||
60e453a9 ML |
1732 | if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) && |
1733 | !(info->flags & FLAG_MULTI_PACKET)) { | |
1734 | dev->padding_pkt = kzalloc(1, GFP_KERNEL); | |
09b69024 WY |
1735 | if (!dev->padding_pkt) { |
1736 | status = -ENOMEM; | |
60e453a9 | 1737 | goto out4; |
09b69024 | 1738 | } |
60e453a9 ML |
1739 | } |
1740 | ||
1da177e4 LT |
1741 | status = register_netdev (net); |
1742 | if (status) | |
60e453a9 | 1743 | goto out5; |
a475f603 JP |
1744 | netif_info(dev, probe, dev->net, |
1745 | "register '%s' at usb-%s-%s, %s, %pM\n", | |
1746 | udev->dev.driver->name, | |
1747 | xdev->bus->bus_name, xdev->devpath, | |
1748 | dev->driver_info->description, | |
1749 | net->dev_addr); | |
1da177e4 LT |
1750 | |
1751 | // ok, it's ready to go. | |
1752 | usb_set_intfdata (udev, dev); | |
1753 | ||
1da177e4 LT |
1754 | netif_device_attach (net); |
1755 | ||
37e8273c | 1756 | if (dev->driver_info->flags & FLAG_LINK_INTR) |
0162c554 | 1757 | usbnet_link_change(dev, 0, 0); |
37e8273c | 1758 | |
1da177e4 LT |
1759 | return 0; |
1760 | ||
60e453a9 ML |
1761 | out5: |
1762 | kfree(dev->padding_pkt); | |
a4723848 | 1763 | out4: |
1764 | usb_free_urb(dev->interrupt); | |
1da177e4 LT |
1765 | out3: |
1766 | if (info->unbind) | |
1767 | info->unbind (dev, udev); | |
1768 | out1: | |
1769 | free_netdev(net); | |
1770 | out: | |
1da177e4 LT |
1771 | return status; |
1772 | } | |
38bde1d4 | 1773 | EXPORT_SYMBOL_GPL(usbnet_probe); |
1da177e4 LT |
1774 | |
1775 | /*-------------------------------------------------------------------------*/ | |
1776 | ||
36433127 ON |
1777 | /* |
1778 | * suspend the whole driver as soon as the first interface is suspended | |
1779 | * resume only when the last interface is resumed | |
38bde1d4 | 1780 | */ |
1da177e4 | 1781 | |
38bde1d4 | 1782 | int usbnet_suspend (struct usb_interface *intf, pm_message_t message) |
1da177e4 LT |
1783 | { |
1784 | struct usbnet *dev = usb_get_intfdata(intf); | |
cb1cebbe | 1785 | |
36433127 | 1786 | if (!dev->suspend_count++) { |
69ee472f ON |
1787 | spin_lock_irq(&dev->txq.lock); |
1788 | /* don't autosuspend while transmitting */ | |
5b1b0b81 | 1789 | if (dev->txq.qlen && PMSG_IS_AUTO(message)) { |
5eeb3132 | 1790 | dev->suspend_count--; |
69ee472f ON |
1791 | spin_unlock_irq(&dev->txq.lock); |
1792 | return -EBUSY; | |
1793 | } else { | |
1794 | set_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1795 | spin_unlock_irq(&dev->txq.lock); | |
1796 | } | |
a11a6544 ON |
1797 | /* |
1798 | * accelerate emptying of the rx and queues, to avoid | |
36433127 ON |
1799 | * having everything error out. |
1800 | */ | |
1801 | netif_device_detach (dev->net); | |
69ee472f | 1802 | usbnet_terminate_urbs(dev); |
6eecdc5f | 1803 | __usbnet_status_stop_force(dev); |
69ee472f | 1804 | |
a11a6544 ON |
1805 | /* |
1806 | * reattach so runtime management can use and | |
1807 | * wake the device | |
1808 | */ | |
1809 | netif_device_attach (dev->net); | |
36433127 | 1810 | } |
1da177e4 LT |
1811 | return 0; |
1812 | } | |
38bde1d4 | 1813 | EXPORT_SYMBOL_GPL(usbnet_suspend); |
1da177e4 | 1814 | |
38bde1d4 | 1815 | int usbnet_resume (struct usb_interface *intf) |
1da177e4 LT |
1816 | { |
1817 | struct usbnet *dev = usb_get_intfdata(intf); | |
69ee472f ON |
1818 | struct sk_buff *skb; |
1819 | struct urb *res; | |
1820 | int retval; | |
1821 | ||
1822 | if (!--dev->suspend_count) { | |
6eecdc5f DW |
1823 | /* resume interrupt URB if it was previously submitted */ |
1824 | __usbnet_status_start_force(dev, GFP_NOIO); | |
68972efa | 1825 | |
69ee472f ON |
1826 | spin_lock_irq(&dev->txq.lock); |
1827 | while ((res = usb_get_from_anchor(&dev->deferred))) { | |
1828 | ||
69ee472f ON |
1829 | skb = (struct sk_buff *)res->context; |
1830 | retval = usb_submit_urb(res, GFP_ATOMIC); | |
1831 | if (retval < 0) { | |
1832 | dev_kfree_skb_any(skb); | |
638c5115 | 1833 | kfree(res->sg); |
69ee472f ON |
1834 | usb_free_urb(res); |
1835 | usb_autopm_put_interface_async(dev->intf); | |
1836 | } else { | |
1837 | dev->net->trans_start = jiffies; | |
1838 | __skb_queue_tail(&dev->txq, skb); | |
1839 | } | |
1840 | } | |
1da177e4 | 1841 | |
69ee472f ON |
1842 | smp_mb(); |
1843 | clear_bit(EVENT_DEV_ASLEEP, &dev->flags); | |
1844 | spin_unlock_irq(&dev->txq.lock); | |
75bd0cbd ML |
1845 | |
1846 | if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { | |
14a0d635 ON |
1847 | /* handle remote wakeup ASAP |
1848 | * we cannot race against stop | |
1849 | */ | |
1850 | if (netif_device_present(dev->net) && | |
65841fd5 ML |
1851 | !timer_pending(&dev->delay) && |
1852 | !test_bit(EVENT_RX_HALT, &dev->flags)) | |
ab6f148d | 1853 | rx_alloc_submit(dev, GFP_NOIO); |
65841fd5 | 1854 | |
75bd0cbd | 1855 | if (!(dev->txq.qlen >= TX_QLEN(dev))) |
1aa9bc5b | 1856 | netif_tx_wake_all_queues(dev->net); |
75bd0cbd ML |
1857 | tasklet_schedule (&dev->bh); |
1858 | } | |
69ee472f | 1859 | } |
5d9d01a3 ON |
1860 | |
1861 | if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) | |
1862 | usb_autopm_get_interface_no_resume(intf); | |
1863 | ||
1da177e4 LT |
1864 | return 0; |
1865 | } | |
38bde1d4 | 1866 | EXPORT_SYMBOL_GPL(usbnet_resume); |
1da177e4 | 1867 | |
5d9d01a3 ON |
1868 | /* |
1869 | * Either a subdriver implements manage_power, then it is assumed to always | |
1870 | * be ready to be suspended or it reports the readiness to be suspended | |
1871 | * explicitly | |
1872 | */ | |
1873 | void usbnet_device_suggests_idle(struct usbnet *dev) | |
1874 | { | |
1875 | if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) { | |
1876 | dev->intf->needs_remote_wakeup = 1; | |
1877 | usb_autopm_put_interface_async(dev->intf); | |
1878 | } | |
1879 | } | |
1880 | EXPORT_SYMBOL(usbnet_device_suggests_idle); | |
1da177e4 | 1881 | |
2dd7c8cf ON |
1882 | /* |
1883 | * For devices that can do without special commands | |
1884 | */ | |
1885 | int usbnet_manage_power(struct usbnet *dev, int on) | |
1886 | { | |
1887 | dev->intf->needs_remote_wakeup = on; | |
1888 | return 0; | |
1889 | } | |
1890 | EXPORT_SYMBOL(usbnet_manage_power); | |
1891 | ||
ac64995d ML |
1892 | void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset) |
1893 | { | |
1894 | /* update link after link is reseted */ | |
1895 | if (link && !need_reset) | |
1896 | netif_carrier_on(dev->net); | |
1897 | else | |
1898 | netif_carrier_off(dev->net); | |
1899 | ||
1900 | if (need_reset && link) | |
1901 | usbnet_defer_kevent(dev, EVENT_LINK_RESET); | |
4b49f58f ML |
1902 | else |
1903 | usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); | |
ac64995d ML |
1904 | } |
1905 | EXPORT_SYMBOL(usbnet_link_change); | |
1906 | ||
877bd862 | 1907 | /*-------------------------------------------------------------------------*/ |
0547fad2 ML |
1908 | static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1909 | u16 value, u16 index, void *data, u16 size) | |
877bd862 ML |
1910 | { |
1911 | void *buf = NULL; | |
1912 | int err = -ENOMEM; | |
1913 | ||
1914 | netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x" | |
1915 | " value=0x%04x index=0x%04x size=%d\n", | |
1916 | cmd, reqtype, value, index, size); | |
1917 | ||
1918 | if (data) { | |
1919 | buf = kmalloc(size, GFP_KERNEL); | |
1920 | if (!buf) | |
1921 | goto out; | |
1922 | } | |
1923 | ||
1924 | err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), | |
1925 | cmd, reqtype, value, index, buf, size, | |
1926 | USB_CTRL_GET_TIMEOUT); | |
1927 | if (err > 0 && err <= size) | |
1928 | memcpy(data, buf, err); | |
1929 | kfree(buf); | |
1930 | out: | |
1931 | return err; | |
1932 | } | |
877bd862 | 1933 | |
0547fad2 ML |
1934 | static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, |
1935 | u16 value, u16 index, const void *data, | |
1936 | u16 size) | |
877bd862 ML |
1937 | { |
1938 | void *buf = NULL; | |
1939 | int err = -ENOMEM; | |
1940 | ||
1941 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
1942 | " value=0x%04x index=0x%04x size=%d\n", | |
1943 | cmd, reqtype, value, index, size); | |
1944 | ||
1945 | if (data) { | |
1946 | buf = kmemdup(data, size, GFP_KERNEL); | |
1947 | if (!buf) | |
1948 | goto out; | |
1949 | } | |
1950 | ||
1951 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), | |
1952 | cmd, reqtype, value, index, buf, size, | |
1953 | USB_CTRL_SET_TIMEOUT); | |
1954 | kfree(buf); | |
1955 | ||
1956 | out: | |
1957 | return err; | |
1958 | } | |
0547fad2 | 1959 | |
c40a2c88 ON |
1960 | int cdc_parse_cdc_header(struct usb_cdc_parsed_header *hdr, |
1961 | struct usb_interface *intf, | |
1962 | u8 *buffer, | |
1963 | int buflen) | |
1964 | { | |
1965 | /* duplicates are ignored */ | |
1966 | struct usb_cdc_union_desc *union_header = NULL; | |
1967 | ||
1968 | /* duplicates are not tolerated */ | |
1969 | struct usb_cdc_header_desc *header = NULL; | |
1970 | struct usb_cdc_ether_desc *ether = NULL; | |
1971 | struct usb_cdc_mdlm_detail_desc *detail = NULL; | |
1972 | struct usb_cdc_mdlm_desc *desc = NULL; | |
1973 | ||
1974 | unsigned int elength; | |
1975 | int cnt = 0; | |
1976 | ||
1977 | memset(hdr, 0x00, sizeof(struct usb_cdc_parsed_header)); | |
1978 | hdr->phonet_magic_present = false; | |
1979 | while (buflen > 0) { | |
1980 | elength = buffer[0]; | |
1981 | if (!elength) { | |
1982 | dev_err(&intf->dev, "skipping garbage byte\n"); | |
1983 | elength = 1; | |
1984 | goto next_desc; | |
1985 | } | |
1986 | if (buffer[1] != USB_DT_CS_INTERFACE) { | |
1987 | dev_err(&intf->dev, "skipping garbage\n"); | |
1988 | goto next_desc; | |
1989 | } | |
1990 | ||
1991 | switch (buffer[2]) { | |
1992 | case USB_CDC_UNION_TYPE: /* we've found it */ | |
1993 | if (elength < sizeof(struct usb_cdc_union_desc)) | |
1994 | goto next_desc; | |
1995 | if (union_header) { | |
1996 | dev_err(&intf->dev, "More than one union descriptor, skipping ...\n"); | |
1997 | goto next_desc; | |
1998 | } | |
1999 | union_header = (struct usb_cdc_union_desc *)buffer; | |
2000 | break; | |
2001 | case USB_CDC_COUNTRY_TYPE: | |
2002 | if (elength < sizeof(struct usb_cdc_country_functional_desc)) | |
2003 | goto next_desc; | |
2004 | hdr->usb_cdc_country_functional_desc = | |
2005 | (struct usb_cdc_country_functional_desc *)buffer; | |
2006 | break; | |
2007 | case USB_CDC_HEADER_TYPE: | |
2008 | if (elength != sizeof(struct usb_cdc_header_desc)) | |
2009 | goto next_desc; | |
2010 | if (header) | |
2011 | return -EINVAL; | |
2012 | header = (struct usb_cdc_header_desc *)buffer; | |
2013 | break; | |
2014 | case USB_CDC_ACM_TYPE: | |
2015 | if (elength < sizeof(struct usb_cdc_acm_descriptor)) | |
2016 | goto next_desc; | |
2017 | hdr->usb_cdc_acm_descriptor = | |
2018 | (struct usb_cdc_acm_descriptor *)buffer; | |
2019 | break; | |
2020 | case USB_CDC_ETHERNET_TYPE: | |
2021 | if (elength != sizeof(struct usb_cdc_ether_desc)) | |
2022 | goto next_desc; | |
2023 | if (ether) | |
2024 | return -EINVAL; | |
2025 | ether = (struct usb_cdc_ether_desc *)buffer; | |
2026 | break; | |
2027 | case USB_CDC_CALL_MANAGEMENT_TYPE: | |
2028 | if (elength < sizeof(struct usb_cdc_call_mgmt_descriptor)) | |
2029 | goto next_desc; | |
2030 | hdr->usb_cdc_call_mgmt_descriptor = | |
2031 | (struct usb_cdc_call_mgmt_descriptor *)buffer; | |
2032 | break; | |
2033 | case USB_CDC_DMM_TYPE: | |
2034 | if (elength < sizeof(struct usb_cdc_dmm_desc)) | |
2035 | goto next_desc; | |
2036 | hdr->usb_cdc_dmm_desc = | |
2037 | (struct usb_cdc_dmm_desc *)buffer; | |
2038 | break; | |
2039 | case USB_CDC_MDLM_TYPE: | |
2040 | if (elength < sizeof(struct usb_cdc_mdlm_desc *)) | |
2041 | goto next_desc; | |
2042 | if (desc) | |
2043 | return -EINVAL; | |
2044 | desc = (struct usb_cdc_mdlm_desc *)buffer; | |
2045 | break; | |
2046 | case USB_CDC_MDLM_DETAIL_TYPE: | |
2047 | if (elength < sizeof(struct usb_cdc_mdlm_detail_desc *)) | |
2048 | goto next_desc; | |
2049 | if (detail) | |
2050 | return -EINVAL; | |
2051 | detail = (struct usb_cdc_mdlm_detail_desc *)buffer; | |
2052 | break; | |
2053 | case USB_CDC_NCM_TYPE: | |
2054 | if (elength < sizeof(struct usb_cdc_ncm_desc)) | |
2055 | goto next_desc; | |
2056 | hdr->usb_cdc_ncm_desc = (struct usb_cdc_ncm_desc *)buffer; | |
2057 | break; | |
2058 | case USB_CDC_MBIM_TYPE: | |
2059 | if (elength < sizeof(struct usb_cdc_mbim_desc)) | |
2060 | goto next_desc; | |
2061 | ||
2062 | hdr->usb_cdc_mbim_desc = (struct usb_cdc_mbim_desc *)buffer; | |
2063 | break; | |
2064 | case USB_CDC_MBIM_EXTENDED_TYPE: | |
2065 | if (elength < sizeof(struct usb_cdc_mbim_extended_desc)) | |
2066 | break; | |
2067 | hdr->usb_cdc_mbim_extended_desc = | |
2068 | (struct usb_cdc_mbim_extended_desc *)buffer; | |
2069 | break; | |
2070 | case CDC_PHONET_MAGIC_NUMBER: | |
2071 | hdr->phonet_magic_present = true; | |
2072 | break; | |
2073 | default: | |
2074 | /* | |
2075 | * there are LOTS more CDC descriptors that | |
2076 | * could legitimately be found here. | |
2077 | */ | |
2078 | dev_dbg(&intf->dev, "Ignoring descriptor: type %02x, length %ud\n", | |
2079 | buffer[2], elength); | |
2080 | goto next_desc; | |
2081 | } | |
2082 | cnt++; | |
2083 | next_desc: | |
2084 | buflen -= elength; | |
2085 | buffer += elength; | |
2086 | } | |
2087 | hdr->usb_cdc_union_desc = union_header; | |
2088 | hdr->usb_cdc_header_desc = header; | |
2089 | hdr->usb_cdc_mdlm_detail_desc = detail; | |
2090 | hdr->usb_cdc_mdlm_desc = desc; | |
2091 | hdr->usb_cdc_ether_desc = ether; | |
2092 | return cnt; | |
2093 | } | |
2094 | ||
2095 | EXPORT_SYMBOL(cdc_parse_cdc_header); | |
2096 | ||
0547fad2 ML |
2097 | /* |
2098 | * The function can't be called inside suspend/resume callback, | |
2099 | * otherwise deadlock will be caused. | |
2100 | */ | |
2101 | int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2102 | u16 value, u16 index, void *data, u16 size) | |
2103 | { | |
6f0a0986 ML |
2104 | int ret; |
2105 | ||
2106 | if (usb_autopm_get_interface(dev->intf) < 0) | |
2107 | return -ENODEV; | |
2108 | ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
2109 | data, size); | |
2110 | usb_autopm_put_interface(dev->intf); | |
2111 | return ret; | |
0547fad2 ML |
2112 | } |
2113 | EXPORT_SYMBOL_GPL(usbnet_read_cmd); | |
2114 | ||
2115 | /* | |
2116 | * The function can't be called inside suspend/resume callback, | |
2117 | * otherwise deadlock will be caused. | |
2118 | */ | |
2119 | int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2120 | u16 value, u16 index, const void *data, u16 size) | |
2121 | { | |
6f0a0986 ML |
2122 | int ret; |
2123 | ||
2124 | if (usb_autopm_get_interface(dev->intf) < 0) | |
2125 | return -ENODEV; | |
2126 | ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
2127 | data, size); | |
2128 | usb_autopm_put_interface(dev->intf); | |
2129 | return ret; | |
0547fad2 | 2130 | } |
877bd862 ML |
2131 | EXPORT_SYMBOL_GPL(usbnet_write_cmd); |
2132 | ||
0547fad2 ML |
2133 | /* |
2134 | * The function can be called inside suspend/resume callback safely | |
2135 | * and should only be called by suspend/resume callback generally. | |
2136 | */ | |
2137 | int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2138 | u16 value, u16 index, void *data, u16 size) | |
2139 | { | |
2140 | return __usbnet_read_cmd(dev, cmd, reqtype, value, index, | |
2141 | data, size); | |
2142 | } | |
2143 | EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm); | |
2144 | ||
2145 | /* | |
2146 | * The function can be called inside suspend/resume callback safely | |
2147 | * and should only be called by suspend/resume callback generally. | |
2148 | */ | |
2149 | int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, | |
2150 | u16 value, u16 index, const void *data, | |
2151 | u16 size) | |
2152 | { | |
2153 | return __usbnet_write_cmd(dev, cmd, reqtype, value, index, | |
2154 | data, size); | |
2155 | } | |
2156 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm); | |
2157 | ||
877bd862 ML |
2158 | static void usbnet_async_cmd_cb(struct urb *urb) |
2159 | { | |
2160 | struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context; | |
2161 | int status = urb->status; | |
2162 | ||
2163 | if (status < 0) | |
2164 | dev_dbg(&urb->dev->dev, "%s failed with %d", | |
2165 | __func__, status); | |
2166 | ||
2167 | kfree(req); | |
2168 | usb_free_urb(urb); | |
2169 | } | |
2170 | ||
0547fad2 ML |
2171 | /* |
2172 | * The caller must make sure that device can't be put into suspend | |
2173 | * state until the control URB completes. | |
2174 | */ | |
877bd862 ML |
2175 | int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, |
2176 | u16 value, u16 index, const void *data, u16 size) | |
2177 | { | |
2178 | struct usb_ctrlrequest *req = NULL; | |
2179 | struct urb *urb; | |
2180 | int err = -ENOMEM; | |
2181 | void *buf = NULL; | |
2182 | ||
2183 | netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x" | |
2184 | " value=0x%04x index=0x%04x size=%d\n", | |
2185 | cmd, reqtype, value, index, size); | |
2186 | ||
2187 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
2188 | if (!urb) { | |
2189 | netdev_err(dev->net, "Error allocating URB in" | |
2190 | " %s!\n", __func__); | |
2191 | goto fail; | |
2192 | } | |
2193 | ||
2194 | if (data) { | |
2195 | buf = kmemdup(data, size, GFP_ATOMIC); | |
2196 | if (!buf) { | |
2197 | netdev_err(dev->net, "Error allocating buffer" | |
2198 | " in %s!\n", __func__); | |
2199 | goto fail_free; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); | |
38673c82 | 2204 | if (!req) |
877bd862 | 2205 | goto fail_free_buf; |
877bd862 ML |
2206 | |
2207 | req->bRequestType = reqtype; | |
2208 | req->bRequest = cmd; | |
2209 | req->wValue = cpu_to_le16(value); | |
2210 | req->wIndex = cpu_to_le16(index); | |
2211 | req->wLength = cpu_to_le16(size); | |
2212 | ||
2213 | usb_fill_control_urb(urb, dev->udev, | |
2214 | usb_sndctrlpipe(dev->udev, 0), | |
2215 | (void *)req, buf, size, | |
2216 | usbnet_async_cmd_cb, req); | |
2217 | urb->transfer_flags |= URB_FREE_BUFFER; | |
2218 | ||
2219 | err = usb_submit_urb(urb, GFP_ATOMIC); | |
2220 | if (err < 0) { | |
2221 | netdev_err(dev->net, "Error submitting the control" | |
2222 | " message: status=%d\n", err); | |
2223 | goto fail_free; | |
2224 | } | |
2225 | return 0; | |
2226 | ||
2227 | fail_free_buf: | |
2228 | kfree(buf); | |
2229 | fail_free: | |
2230 | kfree(req); | |
2231 | usb_free_urb(urb); | |
2232 | fail: | |
2233 | return err; | |
2234 | ||
2235 | } | |
2236 | EXPORT_SYMBOL_GPL(usbnet_write_cmd_async); | |
1da177e4 LT |
2237 | /*-------------------------------------------------------------------------*/ |
2238 | ||
f29fc259 | 2239 | static int __init usbnet_init(void) |
1da177e4 | 2240 | { |
c582a950 TF |
2241 | /* Compiler should optimize this out. */ |
2242 | BUILD_BUG_ON( | |
2243 | FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data)); | |
1da177e4 | 2244 | |
c7e12ead | 2245 | eth_random_addr(node_id); |
cb1cebbe | 2246 | return 0; |
1da177e4 | 2247 | } |
f29fc259 | 2248 | module_init(usbnet_init); |
1da177e4 | 2249 | |
f29fc259 | 2250 | static void __exit usbnet_exit(void) |
1da177e4 | 2251 | { |
1da177e4 | 2252 | } |
f29fc259 | 2253 | module_exit(usbnet_exit); |
1da177e4 | 2254 | |
f29fc259 | 2255 | MODULE_AUTHOR("David Brownell"); |
090ffa9d | 2256 | MODULE_DESCRIPTION("USB network driver framework"); |
f29fc259 | 2257 | MODULE_LICENSE("GPL"); |