1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41#include <linux/module.h>
42#include <linux/netdevice.h>
43#include <linux/ctype.h>
44#include <linux/etherdevice.h>
45#include <linux/ethtool.h>
46#include <linux/workqueue.h>
47#include <linux/mii.h>
48#include <linux/crc32.h>
49#include <linux/usb.h>
50#include <linux/hrtimer.h>
51#include <linux/atomic.h>
52#include <linux/usb/usbnet.h>
53#include <linux/usb/cdc.h>
54#include <linux/usb/cdc_ncm.h>
55
56#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
57static bool prefer_mbim = true;
58#else
59static bool prefer_mbim;
60#endif
61module_param(prefer_mbim, bool, 0644);
62MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
63
64static void cdc_ncm_txpath_bh(unsigned long param);
65static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
66static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
67static struct usb_driver cdc_ncm_driver;
68
69struct cdc_ncm_stats {
70 char stat_string[ETH_GSTRING_LEN];
71 int sizeof_stat;
72 int stat_offset;
73};
74
75#define CDC_NCM_STAT(str, m) { \
76 .stat_string = str, \
77 .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \
78 .stat_offset = offsetof(struct cdc_ncm_ctx, m) }
79#define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m)
80
81static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = {
82 CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full),
83 CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full),
84 CDC_NCM_SIMPLE_STAT(tx_reason_timeout),
85 CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram),
86 CDC_NCM_SIMPLE_STAT(tx_overhead),
87 CDC_NCM_SIMPLE_STAT(tx_ntbs),
88 CDC_NCM_SIMPLE_STAT(rx_overhead),
89 CDC_NCM_SIMPLE_STAT(rx_ntbs),
90};
91
92#define CDC_NCM_LOW_MEM_MAX_CNT 10
93
94static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset)
95{
96 switch (sset) {
97 case ETH_SS_STATS:
98 return ARRAY_SIZE(cdc_ncm_gstrings_stats);
99 default:
100 return -EOPNOTSUPP;
101 }
102}
103
104static void cdc_ncm_get_ethtool_stats(struct net_device *netdev,
105 struct ethtool_stats __always_unused *stats,
106 u64 *data)
107{
108 struct usbnet *dev = netdev_priv(netdev);
109 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
110 int i;
111 char *p = NULL;
112
113 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
114 p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset;
115 data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
116 }
117}
118
119static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data)
120{
121 u8 *p = data;
122 int i;
123
124 switch (stringset) {
125 case ETH_SS_STATS:
126 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
127 memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN);
128 p += ETH_GSTRING_LEN;
129 }
130 }
131}
132
133static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
134
135static const struct ethtool_ops cdc_ncm_ethtool_ops = {
136 .get_link = usbnet_get_link,
137 .nway_reset = usbnet_nway_reset,
138 .get_drvinfo = usbnet_get_drvinfo,
139 .get_msglevel = usbnet_get_msglevel,
140 .set_msglevel = usbnet_set_msglevel,
141 .get_ts_info = ethtool_op_get_ts_info,
142 .get_sset_count = cdc_ncm_get_sset_count,
143 .get_strings = cdc_ncm_get_strings,
144 .get_ethtool_stats = cdc_ncm_get_ethtool_stats,
145 .get_link_ksettings = usbnet_get_link_ksettings,
146 .set_link_ksettings = usbnet_set_link_ksettings,
147};
148
149static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx)
150{
151 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
152 u32 val, max, min;
153
154
155 min = USB_CDC_NCM_NTB_MIN_IN_SIZE;
156 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
157
158
159 if (max < min) {
160 dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n",
161 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min);
162 max = min;
163 }
164
165 val = clamp_t(u32, new_rx, min, max);
166 if (val != new_rx)
167 dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max);
168
169 return val;
170}
171
172static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx)
173{
174 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
175 u32 val, max, min;
176
177
178 if (ctx->is_ndp16)
179 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
180 else
181 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth32);
182
183 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
184
185
186 min = min(min, max);
187
188 val = clamp_t(u32, new_tx, min, max);
189 if (val != new_tx)
190 dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max);
191
192 return val;
193}
194
195static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf)
196{
197 struct usbnet *dev = netdev_priv(to_net_dev(d));
198 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
199
200 return sprintf(buf, "%u\n", ctx->min_tx_pkt);
201}
202
203static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf)
204{
205 struct usbnet *dev = netdev_priv(to_net_dev(d));
206 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
207
208 return sprintf(buf, "%u\n", ctx->rx_max);
209}
210
211static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf)
212{
213 struct usbnet *dev = netdev_priv(to_net_dev(d));
214 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
215
216 return sprintf(buf, "%u\n", ctx->tx_max);
217}
218
219static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf)
220{
221 struct usbnet *dev = netdev_priv(to_net_dev(d));
222 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
223
224 return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC);
225}
226
227static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
228{
229 struct usbnet *dev = netdev_priv(to_net_dev(d));
230 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
231 unsigned long val;
232
233
234 if (kstrtoul(buf, 0, &val))
235 return -EINVAL;
236
237 ctx->min_tx_pkt = val;
238 return len;
239}
240
241static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
242{
243 struct usbnet *dev = netdev_priv(to_net_dev(d));
244 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
245 unsigned long val;
246
247 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val)
248 return -EINVAL;
249
250 cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max);
251 return len;
252}
253
254static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
255{
256 struct usbnet *dev = netdev_priv(to_net_dev(d));
257 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
258 unsigned long val;
259
260 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val)
261 return -EINVAL;
262
263 cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val);
264 return len;
265}
266
267static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
268{
269 struct usbnet *dev = netdev_priv(to_net_dev(d));
270 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
271 ssize_t ret;
272 unsigned long val;
273
274 ret = kstrtoul(buf, 0, &val);
275 if (ret)
276 return ret;
277 if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX))
278 return -EINVAL;
279
280 spin_lock_bh(&ctx->mtx);
281 ctx->timer_interval = val * NSEC_PER_USEC;
282 if (!ctx->timer_interval)
283 ctx->tx_timer_pending = 0;
284 spin_unlock_bh(&ctx->mtx);
285 return len;
286}
287
288static DEVICE_ATTR(min_tx_pkt, 0644, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt);
289static DEVICE_ATTR(rx_max, 0644, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max);
290static DEVICE_ATTR(tx_max, 0644, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max);
291static DEVICE_ATTR(tx_timer_usecs, 0644, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs);
292
293static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf)
294{
295 struct usbnet *dev = netdev_priv(to_net_dev(d));
296 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
297
298 return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N');
299}
300
301static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
302{
303 struct usbnet *dev = netdev_priv(to_net_dev(d));
304 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
305 bool enable;
306
307 if (strtobool(buf, &enable))
308 return -EINVAL;
309
310
311 if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
312 return len;
313
314 if (enable) {
315 if (ctx->is_ndp16 && !ctx->delayed_ndp16) {
316 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
317 if (!ctx->delayed_ndp16)
318 return -ENOMEM;
319 }
320 if (!ctx->is_ndp16 && !ctx->delayed_ndp32) {
321 ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
322 if (!ctx->delayed_ndp32)
323 return -ENOMEM;
324 }
325 }
326
327
328 netif_tx_lock_bh(dev->net);
329 usbnet_start_xmit(NULL, dev->net);
330 spin_lock_bh(&ctx->mtx);
331 if (enable)
332 ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END;
333 else
334 ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END;
335 spin_unlock_bh(&ctx->mtx);
336 netif_tx_unlock_bh(dev->net);
337
338 return len;
339}
340static DEVICE_ATTR_RW(ndp_to_end);
341
342#define NCM_PARM_ATTR(name, format, tocpu) \
343static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \
344{ \
345 struct usbnet *dev = netdev_priv(to_net_dev(d)); \
346 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \
347 return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \
348} \
349static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL)
350
351NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu);
352NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu);
353NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu);
354NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu);
355NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu);
356NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu);
357NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu);
358NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu);
359NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu);
360NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu);
361
362static struct attribute *cdc_ncm_sysfs_attrs[] = {
363 &dev_attr_min_tx_pkt.attr,
364 &dev_attr_ndp_to_end.attr,
365 &dev_attr_rx_max.attr,
366 &dev_attr_tx_max.attr,
367 &dev_attr_tx_timer_usecs.attr,
368 &dev_attr_bmNtbFormatsSupported.attr,
369 &dev_attr_dwNtbInMaxSize.attr,
370 &dev_attr_wNdpInDivisor.attr,
371 &dev_attr_wNdpInPayloadRemainder.attr,
372 &dev_attr_wNdpInAlignment.attr,
373 &dev_attr_dwNtbOutMaxSize.attr,
374 &dev_attr_wNdpOutDivisor.attr,
375 &dev_attr_wNdpOutPayloadRemainder.attr,
376 &dev_attr_wNdpOutAlignment.attr,
377 &dev_attr_wNtbOutMaxDatagrams.attr,
378 NULL,
379};
380
381static const struct attribute_group cdc_ncm_sysfs_attr_group = {
382 .name = "cdc_ncm",
383 .attrs = cdc_ncm_sysfs_attrs,
384};
385
386
387static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
388{
389 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
390 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
391 u32 val;
392
393 val = cdc_ncm_check_rx_max(dev, new_rx);
394
395
396 if (val != ctx->rx_max) {
397 __le32 dwNtbInMaxSize = cpu_to_le32(val);
398
399 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
400
401
402 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
403 USB_TYPE_CLASS | USB_DIR_OUT
404 | USB_RECIP_INTERFACE,
405 0, iface_no, &dwNtbInMaxSize, 4) < 0)
406 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
407 else
408 ctx->rx_max = val;
409 }
410
411
412 if (dev->rx_urb_size != ctx->rx_max) {
413 dev->rx_urb_size = ctx->rx_max;
414 if (netif_running(dev->net))
415 usbnet_unlink_rx_urbs(dev);
416 }
417
418 val = cdc_ncm_check_tx_max(dev, new_tx);
419 if (val != ctx->tx_max)
420 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
421
422
423
424
425
426
427
428
429 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
430 val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
431 val++;
432
433
434 if (netif_running(dev->net) && val > ctx->tx_max) {
435 netif_tx_lock_bh(dev->net);
436 usbnet_start_xmit(NULL, dev->net);
437
438 if (ctx->tx_curr_skb) {
439 dev_kfree_skb_any(ctx->tx_curr_skb);
440 ctx->tx_curr_skb = NULL;
441 }
442 ctx->tx_max = val;
443 netif_tx_unlock_bh(dev->net);
444 } else {
445 ctx->tx_max = val;
446 }
447
448 dev->hard_mtu = ctx->tx_max;
449
450
451 usbnet_update_max_qlen(dev);
452
453
454 ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1),
455 CDC_NCM_MIN_TX_PKT, ctx->tx_max);
456}
457
458
459static u8 cdc_ncm_flags(struct usbnet *dev)
460{
461 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
462
463 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
464 return ctx->mbim_desc->bmNetworkCapabilities;
465 if (ctx->func_desc)
466 return ctx->func_desc->bmNetworkCapabilities;
467 return 0;
468}
469
470static int cdc_ncm_eth_hlen(struct usbnet *dev)
471{
472 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
473 return 0;
474 return ETH_HLEN;
475}
476
477static u32 cdc_ncm_min_dgram_size(struct usbnet *dev)
478{
479 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
480 return CDC_MBIM_MIN_DATAGRAM_SIZE;
481 return CDC_NCM_MIN_DATAGRAM_SIZE;
482}
483
484static u32 cdc_ncm_max_dgram_size(struct usbnet *dev)
485{
486 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
487
488 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
489 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
490 if (ctx->ether_desc)
491 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
492 return CDC_NCM_MAX_DATAGRAM_SIZE;
493}
494
495
496
497
498static int cdc_ncm_init(struct usbnet *dev)
499{
500 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
501 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
502 int err;
503
504 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
505 USB_TYPE_CLASS | USB_DIR_IN
506 |USB_RECIP_INTERFACE,
507 0, iface_no, &ctx->ncm_parm,
508 sizeof(ctx->ncm_parm));
509 if (err < 0) {
510 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
511 return err;
512 }
513
514
515 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) {
516 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n");
517 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
518 USB_TYPE_CLASS | USB_DIR_OUT
519 | USB_RECIP_INTERFACE,
520 USB_CDC_NCM_CRC_NOT_APPENDED,
521 iface_no, NULL, 0);
522 if (err < 0)
523 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n");
524 }
525
526
527 ctx->is_ndp16 = 1;
528
529
530
531
532
533
534 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) &
535 USB_CDC_NCM_NTB32_SUPPORTED) {
536 if (ctx->drvflags & CDC_NCM_FLAG_PREFER_NTB32) {
537 ctx->is_ndp16 = 0;
538 dev_dbg(&dev->intf->dev, "Setting NTB format to 32-bit\n");
539 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
540 USB_TYPE_CLASS | USB_DIR_OUT
541 | USB_RECIP_INTERFACE,
542 USB_CDC_NCM_NTB32_FORMAT,
543 iface_no, NULL, 0);
544 } else {
545 ctx->is_ndp16 = 1;
546 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n");
547 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
548 USB_TYPE_CLASS | USB_DIR_OUT
549 | USB_RECIP_INTERFACE,
550 USB_CDC_NCM_NTB16_FORMAT,
551 iface_no, NULL, 0);
552 }
553 if (err < 0) {
554 ctx->is_ndp16 = 1;
555 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
556 }
557 }
558
559
560 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
561 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
562 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
563 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
564 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
565
566 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
567
568 dev_dbg(&dev->intf->dev,
569 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
570 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
571 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
572
573
574 if ((ctx->tx_max_datagrams == 0) ||
575 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
576 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
577
578
579 if (ctx->is_ndp16)
580 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
581 else
582 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp32) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe32);
583
584
585 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
586
587 return 0;
588}
589
590
591static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size)
592{
593 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
594 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
595 __le16 max_datagram_size;
596 u16 mbim_mtu;
597 int err;
598
599
600 ctx->max_datagram_size = clamp_t(u32, new_size,
601 cdc_ncm_min_dgram_size(dev),
602 CDC_NCM_MAX_DATAGRAM_SIZE);
603
604
605 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
606 goto out;
607
608
609 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
610 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
611 0, iface_no, &max_datagram_size, sizeof(max_datagram_size));
612 if (err != sizeof(max_datagram_size)) {
613 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
614 goto out;
615 }
616
617 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
618 goto out;
619
620 max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
621 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
622 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
623 0, iface_no, &max_datagram_size, sizeof(max_datagram_size));
624 if (err < 0)
625 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
626
627out:
628
629 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
630
631
632 if (ctx->mbim_extended_desc) {
633 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU);
634 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu)
635 dev->net->mtu = mbim_mtu;
636 }
637}
638
639static void cdc_ncm_fix_modulus(struct usbnet *dev)
640{
641 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
642 u32 val;
643
644
645
646
647
648
649
650 val = ctx->tx_ndp_modulus;
651
652 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
653 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
654 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
655 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
656 }
657
658
659
660
661
662
663
664 val = ctx->tx_modulus;
665
666 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
667 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
668 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
669 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
670 }
671
672
673 if (ctx->tx_remainder >= ctx->tx_modulus) {
674 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
675 ctx->tx_remainder = 0;
676 }
677
678
679 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
680 (ctx->tx_modulus - 1));
681}
682
683static int cdc_ncm_setup(struct usbnet *dev)
684{
685 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
686 u32 def_rx, def_tx;
687
688
689
690
691 def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX,
692 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
693 def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX,
694 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
695
696
697 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx);
698
699
700 cdc_ncm_fix_modulus(dev);
701
702
703 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
704 return 0;
705}
706
707static void
708cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
709{
710 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
711 u8 ep;
712
713 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
714 e = intf->cur_altsetting->endpoint + ep;
715
716
717 if (!usb_endpoint_maxp(&e->desc))
718 continue;
719
720 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
721 case USB_ENDPOINT_XFER_INT:
722 if (usb_endpoint_dir_in(&e->desc)) {
723 if (!dev->status)
724 dev->status = e;
725 }
726 break;
727
728 case USB_ENDPOINT_XFER_BULK:
729 if (usb_endpoint_dir_in(&e->desc)) {
730 if (!in)
731 in = e;
732 } else {
733 if (!out)
734 out = e;
735 }
736 break;
737
738 default:
739 break;
740 }
741 }
742 if (in && !dev->in)
743 dev->in = usb_rcvbulkpipe(dev->udev,
744 in->desc.bEndpointAddress &
745 USB_ENDPOINT_NUMBER_MASK);
746 if (out && !dev->out)
747 dev->out = usb_sndbulkpipe(dev->udev,
748 out->desc.bEndpointAddress &
749 USB_ENDPOINT_NUMBER_MASK);
750}
751
752static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
753{
754 if (ctx == NULL)
755 return;
756
757 if (ctx->tx_rem_skb != NULL) {
758 dev_kfree_skb_any(ctx->tx_rem_skb);
759 ctx->tx_rem_skb = NULL;
760 }
761
762 if (ctx->tx_curr_skb != NULL) {
763 dev_kfree_skb_any(ctx->tx_curr_skb);
764 ctx->tx_curr_skb = NULL;
765 }
766
767 if (ctx->is_ndp16)
768 kfree(ctx->delayed_ndp16);
769 else
770 kfree(ctx->delayed_ndp32);
771
772 kfree(ctx);
773}
774
775
776
777
778
779int cdc_ncm_change_mtu(struct net_device *net, int new_mtu)
780{
781 struct usbnet *dev = netdev_priv(net);
782
783 net->mtu = new_mtu;
784 cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev));
785
786 return 0;
787}
788EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu);
789
790static const struct net_device_ops cdc_ncm_netdev_ops = {
791 .ndo_open = usbnet_open,
792 .ndo_stop = usbnet_stop,
793 .ndo_start_xmit = usbnet_start_xmit,
794 .ndo_tx_timeout = usbnet_tx_timeout,
795 .ndo_set_rx_mode = usbnet_set_rx_mode,
796 .ndo_get_stats64 = dev_get_tstats64,
797 .ndo_change_mtu = cdc_ncm_change_mtu,
798 .ndo_set_mac_address = eth_mac_addr,
799 .ndo_validate_addr = eth_validate_addr,
800};
801
802int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags)
803{
804 struct cdc_ncm_ctx *ctx;
805 struct usb_driver *driver;
806 u8 *buf;
807 int len;
808 int temp;
809 u8 iface_no;
810 struct usb_cdc_parsed_header hdr;
811
812 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
813 if (!ctx)
814 return -ENOMEM;
815
816 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
817 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
818 tasklet_init(&ctx->bh, cdc_ncm_txpath_bh, (unsigned long)dev);
819 atomic_set(&ctx->stop, 0);
820 spin_lock_init(&ctx->mtx);
821
822
823 dev->data[0] = (unsigned long)ctx;
824
825
826 ctx->control = intf;
827
828
829 driver = driver_of(intf);
830 buf = intf->cur_altsetting->extra;
831 len = intf->cur_altsetting->extralen;
832
833
834 cdc_parse_cdc_header(&hdr, intf, buf, len);
835
836 if (hdr.usb_cdc_union_desc)
837 ctx->data = usb_ifnum_to_if(dev->udev,
838 hdr.usb_cdc_union_desc->bSlaveInterface0);
839 ctx->ether_desc = hdr.usb_cdc_ether_desc;
840 ctx->func_desc = hdr.usb_cdc_ncm_desc;
841 ctx->mbim_desc = hdr.usb_cdc_mbim_desc;
842 ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc;
843
844
845 if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
846 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
847 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
848 }
849
850
851 if (!ctx->data) {
852 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
853 goto error;
854 }
855 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) {
856 if (!ctx->mbim_desc) {
857 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n");
858 goto error;
859 }
860 } else {
861 if (!ctx->ether_desc || !ctx->func_desc) {
862 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n");
863 goto error;
864 }
865 }
866
867
868 if (ctx->data != ctx->control) {
869 temp = usb_driver_claim_interface(driver, ctx->data, dev);
870 if (temp) {
871 dev_dbg(&intf->dev, "failed to claim data intf\n");
872 goto error;
873 }
874 }
875
876 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
877
878
879 ctx->drvflags = drvflags;
880
881
882
883
884
885
886
887 if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE))
888 usb_set_interface(dev->udev, iface_no, data_altsetting);
889
890 temp = usb_set_interface(dev->udev, iface_no, 0);
891 if (temp) {
892 dev_dbg(&intf->dev, "set interface failed\n");
893 goto error2;
894 }
895
896
897 if (cdc_ncm_init(dev))
898 goto error2;
899
900
901
902
903
904
905 usleep_range(10000, 20000);
906
907
908 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
909 if (temp) {
910 dev_dbg(&intf->dev, "set interface failed\n");
911 goto error2;
912 }
913
914 cdc_ncm_find_endpoints(dev, ctx->data);
915 cdc_ncm_find_endpoints(dev, ctx->control);
916 if (!dev->in || !dev->out || !dev->status) {
917 dev_dbg(&intf->dev, "failed to collect endpoints\n");
918 goto error2;
919 }
920
921 usb_set_intfdata(ctx->data, dev);
922 usb_set_intfdata(ctx->control, dev);
923
924 if (ctx->ether_desc) {
925 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
926 if (temp) {
927 dev_dbg(&intf->dev, "failed to get mac address\n");
928 goto error2;
929 }
930 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
931 }
932
933
934 cdc_ncm_setup(dev);
935
936
937 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
938 if (ctx->is_ndp16) {
939 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
940 if (!ctx->delayed_ndp16)
941 goto error2;
942 } else {
943 ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
944 if (!ctx->delayed_ndp32)
945 goto error2;
946 }
947 dev_info(&intf->dev, "NDP will be placed at end of frame for this device.");
948 }
949
950
951 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
952
953
954 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group;
955
956
957 dev->net->netdev_ops = &cdc_ncm_netdev_ops;
958 dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev);
959
960 return 0;
961
962error2:
963 usb_set_intfdata(ctx->control, NULL);
964 usb_set_intfdata(ctx->data, NULL);
965 if (ctx->data != ctx->control)
966 usb_driver_release_interface(driver, ctx->data);
967error:
968 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
969 dev->data[0] = 0;
970 dev_info(&intf->dev, "bind() failure\n");
971 return -ENODEV;
972}
973EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
974
975void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
976{
977 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
978 struct usb_driver *driver = driver_of(intf);
979
980 if (ctx == NULL)
981 return;
982
983 atomic_set(&ctx->stop, 1);
984
985 hrtimer_cancel(&ctx->tx_timer);
986
987 tasklet_kill(&ctx->bh);
988
989
990 if (ctx->control == ctx->data)
991 ctx->data = NULL;
992
993
994 if (intf == ctx->control && ctx->data) {
995 usb_set_intfdata(ctx->data, NULL);
996 usb_driver_release_interface(driver, ctx->data);
997 ctx->data = NULL;
998
999 } else if (intf == ctx->data && ctx->control) {
1000 usb_set_intfdata(ctx->control, NULL);
1001 usb_driver_release_interface(driver, ctx->control);
1002 ctx->control = NULL;
1003 }
1004
1005 usb_set_intfdata(intf, NULL);
1006 cdc_ncm_free(ctx);
1007}
1008EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
1009
1010
1011
1012
1013u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
1014{
1015 struct usb_host_interface *alt;
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032 if (intf->num_altsetting < 2)
1033 return intf->cur_altsetting->desc.bAlternateSetting;
1034
1035 if (prefer_mbim) {
1036 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
1037 if (alt && cdc_ncm_comm_intf_is_mbim(alt))
1038 return CDC_NCM_COMM_ALTSETTING_MBIM;
1039 }
1040 return CDC_NCM_COMM_ALTSETTING_NCM;
1041}
1042EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
1043
1044static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
1045{
1046
1047 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
1048 return -ENODEV;
1049
1050
1051
1052
1053
1054 return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0);
1055}
1056
1057static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
1058{
1059 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
1060
1061 if (skb->len + align > max)
1062 align = max - skb->len;
1063 if (align && skb_tailroom(skb) >= align)
1064 skb_put_zero(skb, align);
1065}
1066
1067
1068
1069
1070static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
1071{
1072 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
1073 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
1074 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
1075
1076
1077
1078
1079
1080 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
1081 if (ctx->delayed_ndp16->dwSignature == sign)
1082 return ctx->delayed_ndp16;
1083
1084
1085
1086
1087
1088 else if (ctx->delayed_ndp16->dwSignature)
1089 return NULL;
1090 }
1091
1092
1093 while (ndpoffset) {
1094 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
1095 if (ndp16->dwSignature == sign)
1096 return ndp16;
1097 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1098 }
1099
1100
1101 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
1102 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size);
1103
1104
1105 if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size)
1106 return NULL;
1107
1108
1109 if (ndp16)
1110 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
1111 else
1112 nth16->wNdpIndex = cpu_to_le16(skb->len);
1113
1114
1115 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
1116 ndp16 = skb_put_zero(skb, ctx->max_ndp_size);
1117 else
1118 ndp16 = ctx->delayed_ndp16;
1119
1120 ndp16->dwSignature = sign;
1121 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
1122 return ndp16;
1123}
1124
1125static struct usb_cdc_ncm_ndp32 *cdc_ncm_ndp32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
1126{
1127 struct usb_cdc_ncm_ndp32 *ndp32 = NULL;
1128 struct usb_cdc_ncm_nth32 *nth32 = (void *)skb->data;
1129 size_t ndpoffset = le32_to_cpu(nth32->dwNdpIndex);
1130
1131
1132
1133
1134
1135 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
1136 if (ctx->delayed_ndp32->dwSignature == sign)
1137 return ctx->delayed_ndp32;
1138
1139
1140
1141
1142
1143 else if (ctx->delayed_ndp32->dwSignature)
1144 return NULL;
1145 }
1146
1147
1148 while (ndpoffset) {
1149 ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb->data + ndpoffset);
1150 if (ndp32->dwSignature == sign)
1151 return ndp32;
1152 ndpoffset = le32_to_cpu(ndp32->dwNextNdpIndex);
1153 }
1154
1155
1156 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
1157 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size);
1158
1159
1160 if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size)
1161 return NULL;
1162
1163
1164 if (ndp32)
1165 ndp32->dwNextNdpIndex = cpu_to_le32(skb->len);
1166 else
1167 nth32->dwNdpIndex = cpu_to_le32(skb->len);
1168
1169
1170 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
1171 ndp32 = skb_put_zero(skb, ctx->max_ndp_size);
1172 else
1173 ndp32 = ctx->delayed_ndp32;
1174
1175 ndp32->dwSignature = sign;
1176 ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32));
1177 return ndp32;
1178}
1179
1180struct sk_buff *
1181cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
1182{
1183 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1184 union {
1185 struct usb_cdc_ncm_nth16 *nth16;
1186 struct usb_cdc_ncm_nth32 *nth32;
1187 } nth;
1188 union {
1189 struct usb_cdc_ncm_ndp16 *ndp16;
1190 struct usb_cdc_ncm_ndp32 *ndp32;
1191 } ndp;
1192 struct sk_buff *skb_out;
1193 u16 n = 0, index, ndplen;
1194 u8 ready2send = 0;
1195 u32 delayed_ndp_size;
1196 size_t padding_count;
1197
1198
1199
1200
1201 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)
1202 delayed_ndp_size = ctx->max_ndp_size +
1203 max_t(u32,
1204 ctx->tx_ndp_modulus,
1205 ctx->tx_modulus + ctx->tx_remainder) - 1;
1206 else
1207 delayed_ndp_size = 0;
1208
1209
1210 if (skb != NULL) {
1211 swap(skb, ctx->tx_rem_skb);
1212 swap(sign, ctx->tx_rem_sign);
1213 } else {
1214 ready2send = 1;
1215 }
1216
1217
1218 skb_out = ctx->tx_curr_skb;
1219
1220
1221 if (!skb_out) {
1222 if (ctx->tx_low_mem_val == 0) {
1223 ctx->tx_curr_size = ctx->tx_max;
1224 skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
1225
1226
1227
1228
1229
1230 if (skb_out == NULL) {
1231 ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1,
1232 (unsigned)CDC_NCM_LOW_MEM_MAX_CNT);
1233 ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt;
1234 }
1235 }
1236 if (skb_out == NULL) {
1237
1238
1239
1240
1241 if (skb)
1242 ctx->tx_curr_size = max(skb->len,
1243 (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE);
1244 else
1245 ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE;
1246 skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
1247
1248
1249 if (skb_out == NULL) {
1250 if (skb != NULL) {
1251 dev_kfree_skb_any(skb);
1252 dev->net->stats.tx_dropped++;
1253 }
1254 goto exit_no_skb;
1255 }
1256 ctx->tx_low_mem_val--;
1257 }
1258 if (ctx->is_ndp16) {
1259
1260 nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16));
1261 nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
1262 nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
1263 nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
1264 } else {
1265
1266 nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32));
1267 nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN);
1268 nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32));
1269 nth.nth32->wSequence = cpu_to_le16(ctx->tx_seq++);
1270 }
1271
1272
1273 ctx->tx_curr_frame_num = 0;
1274
1275
1276 ctx->tx_curr_frame_payload = 0;
1277 }
1278
1279 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
1280
1281 if (skb == NULL) {
1282 skb = ctx->tx_rem_skb;
1283 sign = ctx->tx_rem_sign;
1284 ctx->tx_rem_skb = NULL;
1285
1286
1287 if (skb == NULL)
1288 break;
1289 }
1290
1291
1292 if (ctx->is_ndp16)
1293 ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
1294 else
1295 ndp.ndp32 = cdc_ncm_ndp32(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
1296
1297
1298 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size);
1299
1300
1301 if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) ||
1302 skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) {
1303 if (n == 0) {
1304
1305 dev_kfree_skb_any(skb);
1306 skb = NULL;
1307 dev->net->stats.tx_dropped++;
1308 } else {
1309
1310 if (ctx->tx_rem_skb != NULL) {
1311 dev_kfree_skb_any(ctx->tx_rem_skb);
1312 dev->net->stats.tx_dropped++;
1313 }
1314 ctx->tx_rem_skb = skb;
1315 ctx->tx_rem_sign = sign;
1316 skb = NULL;
1317 ready2send = 1;
1318 ctx->tx_reason_ntb_full++;
1319 }
1320 break;
1321 }
1322
1323
1324 if (ctx->is_ndp16) {
1325 ndplen = le16_to_cpu(ndp.ndp16->wLength);
1326 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
1327
1328
1329 ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
1330 ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
1331 ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
1332 } else {
1333 ndplen = le16_to_cpu(ndp.ndp32->wLength);
1334 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1;
1335
1336 ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len);
1337 ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len);
1338 ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32));
1339 }
1340 skb_put_data(skb_out, skb->data, skb->len);
1341 ctx->tx_curr_frame_payload += skb->len;
1342 dev_kfree_skb_any(skb);
1343 skb = NULL;
1344
1345
1346 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
1347 ready2send = 1;
1348 ctx->tx_reason_ndp_full++;
1349 break;
1350 }
1351 }
1352
1353
1354 if (skb != NULL) {
1355 dev_kfree_skb_any(skb);
1356 skb = NULL;
1357 dev->net->stats.tx_dropped++;
1358 }
1359
1360 ctx->tx_curr_frame_num = n;
1361
1362 if (n == 0) {
1363
1364
1365 ctx->tx_curr_skb = skb_out;
1366 goto exit_no_skb;
1367
1368 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
1369
1370
1371 ctx->tx_curr_skb = skb_out;
1372
1373 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
1374 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
1375 goto exit_no_skb;
1376
1377 } else {
1378 if (n == ctx->tx_max_datagrams)
1379 ctx->tx_reason_max_datagram++;
1380
1381
1382 }
1383
1384
1385 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
1386 if (ctx->is_ndp16) {
1387 nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1388 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
1389 nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len);
1390 skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size);
1391
1392
1393 ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size);
1394 } else {
1395 nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
1396 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
1397 nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len);
1398 skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size);
1399
1400 ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size);
1401 }
1402 }
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
1414 skb_out->len > ctx->min_tx_pkt) {
1415 padding_count = ctx->tx_curr_size - skb_out->len;
1416 if (!WARN_ON(padding_count > ctx->tx_curr_size))
1417 skb_put_zero(skb_out, padding_count);
1418 } else if (skb_out->len < ctx->tx_curr_size &&
1419 (skb_out->len % dev->maxpacket) == 0) {
1420 skb_put_u8(skb_out, 0);
1421 }
1422
1423
1424 if (ctx->is_ndp16) {
1425 nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1426 nth.nth16->wBlockLength = cpu_to_le16(skb_out->len);
1427 } else {
1428 nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
1429 nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len);
1430 }
1431
1432
1433 ctx->tx_curr_skb = NULL;
1434
1435
1436 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
1437 ctx->tx_ntbs++;
1438
1439
1440
1441
1442
1443 usbnet_set_skb_tx_stats(skb_out, n,
1444 (long)ctx->tx_curr_frame_payload - skb_out->len);
1445
1446 return skb_out;
1447
1448exit_no_skb:
1449
1450 if (ctx->tx_curr_skb != NULL && n > 0)
1451 cdc_ncm_tx_timeout_start(ctx);
1452 return NULL;
1453}
1454EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
1455
1456static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
1457{
1458
1459 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
1460 hrtimer_start(&ctx->tx_timer,
1461 ctx->timer_interval,
1462 HRTIMER_MODE_REL);
1463}
1464
1465static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
1466{
1467 struct cdc_ncm_ctx *ctx =
1468 container_of(timer, struct cdc_ncm_ctx, tx_timer);
1469
1470 if (!atomic_read(&ctx->stop))
1471 tasklet_schedule(&ctx->bh);
1472 return HRTIMER_NORESTART;
1473}
1474
1475static void cdc_ncm_txpath_bh(unsigned long param)
1476{
1477 struct usbnet *dev = (struct usbnet *)param;
1478 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1479
1480 spin_lock_bh(&ctx->mtx);
1481 if (ctx->tx_timer_pending != 0) {
1482 ctx->tx_timer_pending--;
1483 cdc_ncm_tx_timeout_start(ctx);
1484 spin_unlock_bh(&ctx->mtx);
1485 } else if (dev->net != NULL) {
1486 ctx->tx_reason_timeout++;
1487 spin_unlock_bh(&ctx->mtx);
1488 netif_tx_lock_bh(dev->net);
1489 usbnet_start_xmit(NULL, dev->net);
1490 netif_tx_unlock_bh(dev->net);
1491 } else {
1492 spin_unlock_bh(&ctx->mtx);
1493 }
1494}
1495
1496struct sk_buff *
1497cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1498{
1499 struct sk_buff *skb_out;
1500 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1501
1502
1503
1504
1505
1506
1507
1508
1509 if (ctx == NULL)
1510 goto error;
1511
1512 spin_lock_bh(&ctx->mtx);
1513
1514 if (ctx->is_ndp16)
1515 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
1516 else
1517 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN));
1518
1519 spin_unlock_bh(&ctx->mtx);
1520 return skb_out;
1521
1522error:
1523 if (skb != NULL)
1524 dev_kfree_skb_any(skb);
1525
1526 return NULL;
1527}
1528EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
1529
1530
1531int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
1532{
1533 struct usbnet *dev = netdev_priv(skb_in->dev);
1534 struct usb_cdc_ncm_nth16 *nth16;
1535 int len;
1536 int ret = -EINVAL;
1537
1538 if (ctx == NULL)
1539 goto error;
1540
1541 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
1542 sizeof(struct usb_cdc_ncm_ndp16))) {
1543 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
1544 goto error;
1545 }
1546
1547 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
1548
1549 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
1550 netif_dbg(dev, rx_err, dev->net,
1551 "invalid NTH16 signature <%#010x>\n",
1552 le32_to_cpu(nth16->dwSignature));
1553 goto error;
1554 }
1555
1556 len = le16_to_cpu(nth16->wBlockLength);
1557 if (len > ctx->rx_max) {
1558 netif_dbg(dev, rx_err, dev->net,
1559 "unsupported NTB block length %u/%u\n", len,
1560 ctx->rx_max);
1561 goto error;
1562 }
1563
1564 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
1565 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
1566 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
1567 netif_dbg(dev, rx_err, dev->net,
1568 "sequence number glitch prev=%d curr=%d\n",
1569 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
1570 }
1571 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
1572
1573 ret = le16_to_cpu(nth16->wNdpIndex);
1574error:
1575 return ret;
1576}
1577EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
1578
1579int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
1580{
1581 struct usbnet *dev = netdev_priv(skb_in->dev);
1582 struct usb_cdc_ncm_nth32 *nth32;
1583 int len;
1584 int ret = -EINVAL;
1585
1586 if (ctx == NULL)
1587 goto error;
1588
1589 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) +
1590 sizeof(struct usb_cdc_ncm_ndp32))) {
1591 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
1592 goto error;
1593 }
1594
1595 nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data;
1596
1597 if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) {
1598 netif_dbg(dev, rx_err, dev->net,
1599 "invalid NTH32 signature <%#010x>\n",
1600 le32_to_cpu(nth32->dwSignature));
1601 goto error;
1602 }
1603
1604 len = le32_to_cpu(nth32->dwBlockLength);
1605 if (len > ctx->rx_max) {
1606 netif_dbg(dev, rx_err, dev->net,
1607 "unsupported NTB block length %u/%u\n", len,
1608 ctx->rx_max);
1609 goto error;
1610 }
1611
1612 if ((ctx->rx_seq + 1) != le16_to_cpu(nth32->wSequence) &&
1613 (ctx->rx_seq || le16_to_cpu(nth32->wSequence)) &&
1614 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) {
1615 netif_dbg(dev, rx_err, dev->net,
1616 "sequence number glitch prev=%d curr=%d\n",
1617 ctx->rx_seq, le16_to_cpu(nth32->wSequence));
1618 }
1619 ctx->rx_seq = le16_to_cpu(nth32->wSequence);
1620
1621 ret = le32_to_cpu(nth32->dwNdpIndex);
1622error:
1623 return ret;
1624}
1625EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32);
1626
1627
1628int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
1629{
1630 struct usbnet *dev = netdev_priv(skb_in->dev);
1631 struct usb_cdc_ncm_ndp16 *ndp16;
1632 int ret = -EINVAL;
1633
1634 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
1635 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1636 ndpoffset);
1637 goto error;
1638 }
1639 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1640
1641 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
1642 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
1643 le16_to_cpu(ndp16->wLength));
1644 goto error;
1645 }
1646
1647 ret = ((le16_to_cpu(ndp16->wLength) -
1648 sizeof(struct usb_cdc_ncm_ndp16)) /
1649 sizeof(struct usb_cdc_ncm_dpe16));
1650 ret--;
1651
1652 if ((sizeof(struct usb_cdc_ncm_ndp16) +
1653 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
1654 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
1655 ret = -EINVAL;
1656 }
1657
1658error:
1659 return ret;
1660}
1661EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
1662
1663
1664int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset)
1665{
1666 struct usbnet *dev = netdev_priv(skb_in->dev);
1667 struct usb_cdc_ncm_ndp32 *ndp32;
1668 int ret = -EINVAL;
1669
1670 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) {
1671 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1672 ndpoffset);
1673 goto error;
1674 }
1675 ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
1676
1677 if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) {
1678 netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n",
1679 le16_to_cpu(ndp32->wLength));
1680 goto error;
1681 }
1682
1683 ret = ((le16_to_cpu(ndp32->wLength) -
1684 sizeof(struct usb_cdc_ncm_ndp32)) /
1685 sizeof(struct usb_cdc_ncm_dpe32));
1686 ret--;
1687
1688 if ((sizeof(struct usb_cdc_ncm_ndp32) +
1689 ret * (sizeof(struct usb_cdc_ncm_dpe32))) > skb_in->len) {
1690 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
1691 ret = -EINVAL;
1692 }
1693
1694error:
1695 return ret;
1696}
1697EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp32);
1698
1699int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
1700{
1701 struct sk_buff *skb;
1702 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1703 int len;
1704 int nframes;
1705 int x;
1706 int offset;
1707 union {
1708 struct usb_cdc_ncm_ndp16 *ndp16;
1709 struct usb_cdc_ncm_ndp32 *ndp32;
1710 } ndp;
1711 union {
1712 struct usb_cdc_ncm_dpe16 *dpe16;
1713 struct usb_cdc_ncm_dpe32 *dpe32;
1714 } dpe;
1715
1716 int ndpoffset;
1717 int loopcount = 50;
1718 u32 payload = 0;
1719
1720 if (ctx->is_ndp16)
1721 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
1722 else
1723 ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in);
1724
1725 if (ndpoffset < 0)
1726 goto error;
1727
1728next_ndp:
1729 if (ctx->is_ndp16) {
1730 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
1731 if (nframes < 0)
1732 goto error;
1733
1734 ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1735
1736 if (ndp.ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
1737 netif_dbg(dev, rx_err, dev->net,
1738 "invalid DPT16 signature <%#010x>\n",
1739 le32_to_cpu(ndp.ndp16->dwSignature));
1740 goto err_ndp;
1741 }
1742 dpe.dpe16 = ndp.ndp16->dpe16;
1743 } else {
1744 nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset);
1745 if (nframes < 0)
1746 goto error;
1747
1748 ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
1749
1750 if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) {
1751 netif_dbg(dev, rx_err, dev->net,
1752 "invalid DPT32 signature <%#010x>\n",
1753 le32_to_cpu(ndp.ndp32->dwSignature));
1754 goto err_ndp;
1755 }
1756 dpe.dpe32 = ndp.ndp32->dpe32;
1757 }
1758
1759 for (x = 0; x < nframes; x++) {
1760 if (ctx->is_ndp16) {
1761 offset = le16_to_cpu(dpe.dpe16->wDatagramIndex);
1762 len = le16_to_cpu(dpe.dpe16->wDatagramLength);
1763 } else {
1764 offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex);
1765 len = le32_to_cpu(dpe.dpe32->dwDatagramLength);
1766 }
1767
1768
1769
1770
1771
1772 if ((offset == 0) || (len == 0)) {
1773 if (!x)
1774 goto err_ndp;
1775 break;
1776 }
1777
1778
1779 if (((offset + len) > skb_in->len) ||
1780 (len > ctx->rx_max) || (len < ETH_HLEN)) {
1781 netif_dbg(dev, rx_err, dev->net,
1782 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
1783 x, offset, len, skb_in);
1784 if (!x)
1785 goto err_ndp;
1786 break;
1787
1788 } else {
1789
1790 skb = netdev_alloc_skb_ip_align(dev->net, len);
1791 if (!skb)
1792 goto error;
1793 skb_put_data(skb, skb_in->data + offset, len);
1794 usbnet_skb_return(dev, skb);
1795 payload += len;
1796 }
1797
1798 if (ctx->is_ndp16)
1799 dpe.dpe16++;
1800 else
1801 dpe.dpe32++;
1802 }
1803err_ndp:
1804
1805 if (ctx->is_ndp16)
1806 ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex);
1807 else
1808 ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex);
1809
1810 if (ndpoffset && loopcount--)
1811 goto next_ndp;
1812
1813
1814 ctx->rx_overhead += skb_in->len - payload;
1815 ctx->rx_ntbs++;
1816
1817 return 1;
1818error:
1819 return 0;
1820}
1821EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
1822
1823static void
1824cdc_ncm_speed_change(struct usbnet *dev,
1825 struct usb_cdc_speed_change *data)
1826{
1827 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1828 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1829
1830
1831
1832
1833 if (dev->rx_speed == rx_speed && dev->tx_speed == tx_speed)
1834 return;
1835
1836 dev->rx_speed = rx_speed;
1837 dev->tx_speed = tx_speed;
1838
1839
1840
1841
1842
1843 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1844 netif_info(dev, link, dev->net,
1845 "%u mbit/s downlink %u mbit/s uplink\n",
1846 (unsigned int)(rx_speed / 1000000U),
1847 (unsigned int)(tx_speed / 1000000U));
1848 } else {
1849 netif_info(dev, link, dev->net,
1850 "%u kbit/s downlink %u kbit/s uplink\n",
1851 (unsigned int)(rx_speed / 1000U),
1852 (unsigned int)(tx_speed / 1000U));
1853 }
1854}
1855
1856static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1857{
1858 struct usb_cdc_notification *event;
1859
1860 if (urb->actual_length < sizeof(*event))
1861 return;
1862
1863
1864 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1865 cdc_ncm_speed_change(dev,
1866 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1867 return;
1868 }
1869
1870 event = urb->transfer_buffer;
1871
1872 switch (event->bNotificationType) {
1873 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1874
1875
1876
1877
1878
1879 if (netif_carrier_ok(dev->net) != !!event->wValue)
1880 usbnet_link_change(dev, !!event->wValue, 0);
1881 break;
1882
1883 case USB_CDC_NOTIFY_SPEED_CHANGE:
1884 if (urb->actual_length < (sizeof(*event) +
1885 sizeof(struct usb_cdc_speed_change)))
1886 set_bit(EVENT_STS_SPLIT, &dev->flags);
1887 else
1888 cdc_ncm_speed_change(dev,
1889 (struct usb_cdc_speed_change *)&event[1]);
1890 break;
1891
1892 default:
1893 dev_dbg(&dev->udev->dev,
1894 "NCM: unexpected notification 0x%02x!\n",
1895 event->bNotificationType);
1896 break;
1897 }
1898}
1899
1900static const struct driver_info cdc_ncm_info = {
1901 .description = "CDC NCM",
1902 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1903 | FLAG_LINK_INTR,
1904 .bind = cdc_ncm_bind,
1905 .unbind = cdc_ncm_unbind,
1906 .manage_power = usbnet_manage_power,
1907 .status = cdc_ncm_status,
1908 .rx_fixup = cdc_ncm_rx_fixup,
1909 .tx_fixup = cdc_ncm_tx_fixup,
1910 .set_rx_mode = usbnet_cdc_update_filter,
1911};
1912
1913
1914static const struct driver_info wwan_info = {
1915 .description = "Mobile Broadband Network Device",
1916 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1917 | FLAG_LINK_INTR | FLAG_WWAN,
1918 .bind = cdc_ncm_bind,
1919 .unbind = cdc_ncm_unbind,
1920 .manage_power = usbnet_manage_power,
1921 .status = cdc_ncm_status,
1922 .rx_fixup = cdc_ncm_rx_fixup,
1923 .tx_fixup = cdc_ncm_tx_fixup,
1924 .set_rx_mode = usbnet_cdc_update_filter,
1925};
1926
1927
1928static const struct driver_info wwan_noarp_info = {
1929 .description = "Mobile Broadband Network Device (NO ARP)",
1930 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1931 | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP,
1932 .bind = cdc_ncm_bind,
1933 .unbind = cdc_ncm_unbind,
1934 .manage_power = usbnet_manage_power,
1935 .status = cdc_ncm_status,
1936 .rx_fixup = cdc_ncm_rx_fixup,
1937 .tx_fixup = cdc_ncm_tx_fixup,
1938 .set_rx_mode = usbnet_cdc_update_filter,
1939};
1940
1941static const struct usb_device_id cdc_devs[] = {
1942
1943 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1944 | USB_DEVICE_ID_MATCH_VENDOR,
1945 .idVendor = 0x0bdb,
1946 .bInterfaceClass = USB_CLASS_COMM,
1947 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1948 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1949 .driver_info = (unsigned long) &wwan_info,
1950 },
1951
1952
1953 { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036,
1954 USB_CLASS_COMM,
1955 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1956 .driver_info = (unsigned long)&wwan_noarp_info,
1957 },
1958
1959
1960
1961
1962 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb,
1963 USB_CLASS_COMM,
1964 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1965 .driver_info = (unsigned long)&wwan_noarp_info,
1966 },
1967
1968
1969
1970
1971 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc,
1972 USB_CLASS_COMM,
1973 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1974 .driver_info = (unsigned long)&wwan_noarp_info,
1975 },
1976
1977
1978 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1979 | USB_DEVICE_ID_MATCH_VENDOR,
1980 .idVendor = 0x413c,
1981 .bInterfaceClass = USB_CLASS_COMM,
1982 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1983 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1984 .driver_info = (unsigned long) &wwan_info,
1985 },
1986
1987
1988 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1989 | USB_DEVICE_ID_MATCH_VENDOR,
1990 .idVendor = 0x0930,
1991 .bInterfaceClass = USB_CLASS_COMM,
1992 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1993 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1994 .driver_info = (unsigned long) &wwan_info,
1995 },
1996
1997
1998 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1999 USB_CLASS_COMM,
2000 USB_CDC_SUBCLASS_NCM,
2001 USB_CDC_PROTO_NONE),
2002 .driver_info = (unsigned long)&wwan_info,
2003 },
2004
2005
2006 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
2007 USB_CLASS_COMM,
2008 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
2009 .driver_info = (unsigned long)&wwan_noarp_info,
2010 },
2011
2012
2013 { USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010,
2014 USB_CLASS_COMM,
2015 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
2016 .driver_info = (unsigned long)&wwan_info,
2017 },
2018
2019
2020 { USB_INTERFACE_INFO(USB_CLASS_COMM,
2021 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
2022 .driver_info = (unsigned long)&cdc_ncm_info,
2023 },
2024 {
2025 },
2026};
2027MODULE_DEVICE_TABLE(usb, cdc_devs);
2028
2029static struct usb_driver cdc_ncm_driver = {
2030 .name = "cdc_ncm",
2031 .id_table = cdc_devs,
2032 .probe = usbnet_probe,
2033 .disconnect = usbnet_disconnect,
2034 .suspend = usbnet_suspend,
2035 .resume = usbnet_resume,
2036 .reset_resume = usbnet_resume,
2037 .supports_autosuspend = 1,
2038 .disable_hub_initiated_lpm = 1,
2039};
2040
2041module_usb_driver(cdc_ncm_driver);
2042
2043MODULE_AUTHOR("Hans Petter Selasky");
2044MODULE_DESCRIPTION("USB CDC NCM host driver");
2045MODULE_LICENSE("Dual BSD/GPL");
2046