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Alexey Orishko900d4952010-11-29 23:23:28 +00001/*
2 * cdc_ncm.c
3 *
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00004 * Copyright (C) ST-Ericsson 2010-2012
Alexey Orishko900d4952010-11-29 23:23:28 +00005 * Contact: Alexey Orishko <alexey.orishko@stericsson.com>
6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
7 *
8 * USB Host Driver for Network Control Model (NCM)
Enrico Mioso22401ff2015-07-11 17:30:01 +02009 * http://www.usb.org/developers/docs/devclass_docs/NCM10_012011.zip
Alexey Orishko900d4952010-11-29 23:23:28 +000010 *
11 * The NCM encoding, decoding and initialization logic
12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
13 *
14 * This software is available to you under a choice of one of two
15 * licenses. You may choose this file to be licensed under the terms
16 * of the GNU General Public License (GPL) Version 2 or the 2-clause
17 * BSD license listed below:
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41#include <linux/module.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000042#include <linux/netdevice.h>
43#include <linux/ctype.h>
Bjørn Mork1dfddff52015-12-23 13:42:43 +010044#include <linux/etherdevice.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000045#include <linux/ethtool.h>
46#include <linux/workqueue.h>
47#include <linux/mii.h>
48#include <linux/crc32.h>
49#include <linux/usb.h>
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +000050#include <linux/hrtimer.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000051#include <linux/atomic.h>
52#include <linux/usb/usbnet.h>
53#include <linux/usb/cdc.h>
Bjørn Morkc91ce3b2012-10-22 10:56:35 +000054#include <linux/usb/cdc_ncm.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000055
Bjørn Mork1e8bbe62013-03-14 01:05:13 +000056#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
57static bool prefer_mbim = true;
58#else
59static bool prefer_mbim;
60#endif
Joe Perchesd61e4032018-03-23 15:54:39 -070061module_param(prefer_mbim, bool, 0644);
Bjørn Mork1e8bbe62013-03-14 01:05:13 +000062MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
63
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +000064static 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);
Alexey Orishko900d4952010-11-29 23:23:28 +000067static struct usb_driver cdc_ncm_driver;
Alexey Orishko900d4952010-11-29 23:23:28 +000068
Bjørn Morkbeeecd42014-05-16 21:48:25 +020069struct 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
Jim Baxtere1069bb2017-06-28 21:35:29 +010092#define CDC_NCM_LOW_MEM_MAX_CNT 10
93
Bjørn Morkbeeecd42014-05-16 21:48:25 +020094static 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
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200133static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
134
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200135static const struct ethtool_ops cdc_ncm_ethtool_ops = {
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200136 .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,
Bjørn Morkbeeecd42014-05-16 21:48:25 +0200142 .get_sset_count = cdc_ncm_get_sset_count,
143 .get_strings = cdc_ncm_get_strings,
144 .get_ethtool_stats = cdc_ncm_get_ethtool_stats,
Philippe Reynesd0b3ab32017-03-16 23:18:50 +0100145 .get_link_ksettings = usbnet_get_link_ksettings,
146 .set_link_ksettings = usbnet_set_link_ksettings,
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200147};
148
Bjørn Mork289507d2014-05-30 09:31:06 +0200149static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx)
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200150{
151 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200152 u32 val, max, min;
153
154 /* clamp new_rx to sane values */
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 /* dwNtbInMaxSize spec violation? Use MIN size for both limits */
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);
Bjørn Mork289507d2014-05-30 09:31:06 +0200166 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 /* clamp new_tx to sane values */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500178 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
Bjørn Mork289507d2014-05-30 09:31:06 +0200183 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
184
185 /* some devices set dwNtbOutMaxSize too low for the above default */
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
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200195static 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
Bjørn Mork289507d2014-05-30 09:31:06 +0200203static 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
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200227static 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 /* no need to restrict values - anything from 0 to infinity is OK */
234 if (kstrtoul(buf, 0, &val))
235 return -EINVAL;
236
237 ctx->min_tx_pkt = val;
238 return len;
239}
240
Bjørn Mork289507d2014-05-30 09:31:06 +0200241static 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
Joe Perchesd61e4032018-03-23 15:54:39 -0700288static 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);
Bjørn Mork289507d2014-05-30 09:31:06 +0200292
Bjørn Mork404814a2015-12-06 22:47:15 +0100293static 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 /* no change? */
311 if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
312 return len;
313
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500314 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 }
Bjørn Mork404814a2015-12-06 22:47:15 +0100325 }
326
327 /* flush pending data before changing flag */
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
Bjørn Mork871578c2014-05-30 09:31:08 +0200342#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} \
Joe Perchesd61e4032018-03-23 15:54:39 -0700349static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL)
Bjørn Mork871578c2014-05-30 09:31:08 +0200350
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
Bjørn Mork289507d2014-05-30 09:31:06 +0200362static struct attribute *cdc_ncm_sysfs_attrs[] = {
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200363 &dev_attr_min_tx_pkt.attr,
Bjørn Mork404814a2015-12-06 22:47:15 +0100364 &dev_attr_ndp_to_end.attr,
Bjørn Mork289507d2014-05-30 09:31:06 +0200365 &dev_attr_rx_max.attr,
366 &dev_attr_tx_max.attr,
367 &dev_attr_tx_timer_usecs.attr,
Bjørn Mork871578c2014-05-30 09:31:08 +0200368 &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,
Bjørn Mork289507d2014-05-30 09:31:06 +0200378 NULL,
379};
380
Arvind Yadav43f51ef2017-07-18 15:13:45 +0530381static const struct attribute_group cdc_ncm_sysfs_attr_group = {
Bjørn Mork289507d2014-05-30 09:31:06 +0200382 .name = "cdc_ncm",
383 .attrs = cdc_ncm_sysfs_attrs,
384};
385
386/* handle rx_max and tx_max changes */
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);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200394
395 /* inform device about NTB input size changes */
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);
Bjørn Mork68864ab2014-05-16 21:48:21 +0200400
Bjørn Mork68864ab2014-05-16 21:48:21 +0200401 /* tell device to use new size */
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200402 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
Bjørn Morkf42763d2014-05-30 09:31:05 +0200411 /* usbnet use these values for sizing rx queues */
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
Bjørn Mork289507d2014-05-30 09:31:06 +0200418 val = cdc_ncm_check_tx_max(dev, new_tx);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200419 if (val != ctx->tx_max)
420 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200421
422 /* Adding a pad byte here if necessary simplifies the handling
423 * in cdc_ncm_fill_tx_frame, making tx_max always represent
424 * the real skb max size.
425 *
426 * We cannot use dev->maxpacket here because this is called from
427 * .bind which is called before usbnet sets up dev->maxpacket
428 */
Bjørn Mork68864ab2014-05-16 21:48:21 +0200429 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
430 val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
431 val++;
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200432
Bjørn Mork68864ab2014-05-16 21:48:21 +0200433 /* we might need to flush any pending tx buffers if running */
434 if (netif_running(dev->net) && val > ctx->tx_max) {
435 netif_tx_lock_bh(dev->net);
436 usbnet_start_xmit(NULL, dev->net);
Bjørn Mork1ba5d0f2014-05-30 09:31:04 +0200437 /* make sure tx_curr_skb is reallocated if it was empty */
438 if (ctx->tx_curr_skb) {
439 dev_kfree_skb_any(ctx->tx_curr_skb);
440 ctx->tx_curr_skb = NULL;
441 }
Bjørn Mork68864ab2014-05-16 21:48:21 +0200442 ctx->tx_max = val;
443 netif_tx_unlock_bh(dev->net);
444 } else {
445 ctx->tx_max = val;
446 }
447
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200448 dev->hard_mtu = ctx->tx_max;
Bjørn Mork68864ab2014-05-16 21:48:21 +0200449
450 /* max qlen depend on hard_mtu and rx_urb_size */
451 usbnet_update_max_qlen(dev);
Bjørn Mork43e4c6d2014-05-16 21:48:24 +0200452
453 /* never pad more than 3 full USB packets per transfer */
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);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200456}
457
Bjørn Morkf8afb732014-05-16 21:48:19 +0200458/* helpers for NCM and MBIM differences */
459static u8 cdc_ncm_flags(struct usbnet *dev)
Alexey Orishko900d4952010-11-29 23:23:28 +0000460{
Bjørn Morkbed6f762013-11-01 11:16:42 +0100461 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko900d4952010-11-29 23:23:28 +0000462
Bjørn Morkf8afb732014-05-16 21:48:19 +0200463 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/* initial one-time device setup. MUST be called with the data interface
496 * in altsetting 0
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;
Alexey Orishko900d4952010-11-29 23:23:28 +0000503
Ming Lei90b8b032012-10-24 19:46:56 +0000504 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
505 USB_TYPE_CLASS | USB_DIR_IN
506 |USB_RECIP_INTERFACE,
Bjørn Morkff0992e2014-03-17 16:25:18 +0100507 0, iface_no, &ctx->ncm_parm,
508 sizeof(ctx->ncm_parm));
Giuseppe Scrivano36c35412011-08-03 22:10:29 +0000509 if (err < 0) {
Bjørn Mork59ede312013-11-01 11:16:59 +0100510 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
511 return err; /* GET_NTB_PARAMETERS is required */
Alexey Orishko900d4952010-11-29 23:23:28 +0000512 }
513
Bjørn Morkf8afb732014-05-16 21:48:19 +0200514 /* set CRC Mode */
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
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500526 /* use ndp16 by default */
527 ctx->is_ndp16 = 1;
528
Bjørn Morkf8afb732014-05-16 21:48:19 +0200529 /* set NTB format, if both formats are supported.
530 *
531 * "The host shall only send this command while the NCM Data
532 * Interface is in alternate setting 0."
533 */
Dan Carpenterd22adbf2014-05-22 10:52:29 +0300534 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) &
535 USB_CDC_NCM_NTB32_SUPPORTED) {
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500536 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;
Bjørn Morkf8afb732014-05-16 21:48:19 +0200555 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500556 }
Bjørn Morkf8afb732014-05-16 21:48:19 +0200557 }
558
559 /* set initial device values */
Bjørn Morkff0992e2014-03-17 16:25:18 +0100560 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);
Alexey Orishko84e77a82011-02-07 09:45:10 +0000565 /* devices prior to NCM Errata shall set this field to zero */
Bjørn Morkff0992e2014-03-17 16:25:18 +0100566 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
Bjørn Mork47175e52013-11-01 11:16:58 +0100567
Bjørn Morkae223cd2013-11-01 11:16:54 +0100568 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,
Bjørn Morkf8afb732014-05-16 21:48:19 +0200571 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
Alexey Orishko900d4952010-11-29 23:23:28 +0000572
Alexey Orishko84e77a82011-02-07 09:45:10 +0000573 /* max count of tx datagrams */
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;
Alexey Orishko900d4952010-11-29 23:23:28 +0000577
Bjørn Mork70559b82014-05-16 21:48:23 +0200578 /* set up maximum NDP size */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500579 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);
Bjørn Mork70559b82014-05-16 21:48:23 +0200583
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200584 /* initial coalescing timer interval */
585 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
586
Bjørn Morkf8afb732014-05-16 21:48:19 +0200587 return 0;
588}
589
590/* set a new max datagram size */
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 /* set default based on descriptors */
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 /* inform the device about the selected Max Datagram Size? */
605 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
606 goto out;
607
608 /* read current mtu value from device */
609 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
610 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
Oliver Neukum332f9892019-11-07 09:48:01 +0100611 0, iface_no, &max_datagram_size, sizeof(max_datagram_size));
Dan Carpentera56dcc62019-11-13 21:28:31 +0300612 if (err != sizeof(max_datagram_size)) {
Bjørn Morkf8afb732014-05-16 21:48:19 +0200613 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,
Oliver Neukum332f9892019-11-07 09:48:01 +0100623 0, iface_no, &max_datagram_size, sizeof(max_datagram_size));
Bjørn Morkf8afb732014-05-16 21:48:19 +0200624 if (err < 0)
625 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
626
627out:
628 /* set MTU to max supported by the device if necessary */
629 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
630
631 /* do not exceed operater preferred MTU */
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;
Alexey Orishko900d4952010-11-29 23:23:28 +0000643
644 /*
645 * verify that the structure alignment is:
646 * - power of two
647 * - not greater than the maximum transmit length
648 * - not less than four bytes
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)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100654 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000655 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
656 }
657
658 /*
659 * verify that the payload alignment is:
660 * - power of two
661 * - not greater than the maximum transmit length
662 * - not less than four bytes
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)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100668 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000669 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
670 }
671
672 /* verify the payload remainder */
673 if (ctx->tx_remainder >= ctx->tx_modulus) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100674 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000675 ctx->tx_remainder = 0;
676 }
677
678 /* adjust TX-remainder according to NCM specification. */
Bjørn Morkf8afb732014-05-16 21:48:19 +0200679 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
Greg Suarez2d1c4312012-10-22 10:56:30 +0000680 (ctx->tx_modulus - 1));
Bjørn Morkf8afb732014-05-16 21:48:19 +0200681}
Alexey Orishko900d4952010-11-29 23:23:28 +0000682
Bjørn Morkf8afb732014-05-16 21:48:19 +0200683static int cdc_ncm_setup(struct usbnet *dev)
684{
685 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Bjørn Mork50f1cb12014-05-16 21:48:26 +0200686 u32 def_rx, def_tx;
687
688 /* be conservative when selecting intial buffer size to
689 * increase the number of hosts this will work for
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));
Alexey Orishko900d4952010-11-29 23:23:28 +0000695
Bjørn Morkf8afb732014-05-16 21:48:19 +0200696 /* clamp rx_max and tx_max and inform device */
Bjørn Mork50f1cb12014-05-16 21:48:26 +0200697 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx);
Alexey Orishko84e77a82011-02-07 09:45:10 +0000698
Bjørn Morkf8afb732014-05-16 21:48:19 +0200699 /* sanitize the modulus and remainder values */
700 cdc_ncm_fix_modulus(dev);
Alexey Orishko900d4952010-11-29 23:23:28 +0000701
Bjørn Morkf8afb732014-05-16 21:48:19 +0200702 /* set max datagram size */
703 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
Alexey Orishko900d4952010-11-29 23:23:28 +0000704 return 0;
705}
706
707static void
Bjørn Morkff1632a2013-11-01 11:16:41 +0100708cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
Alexey Orishko900d4952010-11-29 23:23:28 +0000709{
Bjørn Morkff1632a2013-11-01 11:16:41 +0100710 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000711 u8 ep;
712
713 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
Alexey Orishko900d4952010-11-29 23:23:28 +0000714 e = intf->cur_altsetting->endpoint + ep;
Bjørn Mork3fe4b332019-09-18 14:01:46 +0200715
716 /* ignore endpoints which cannot transfer data */
717 if (!usb_endpoint_maxp(&e->desc))
718 continue;
719
Alexey Orishko900d4952010-11-29 23:23:28 +0000720 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
721 case USB_ENDPOINT_XFER_INT:
722 if (usb_endpoint_dir_in(&e->desc)) {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100723 if (!dev->status)
724 dev->status = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000725 }
726 break;
727
728 case USB_ENDPOINT_XFER_BULK:
729 if (usb_endpoint_dir_in(&e->desc)) {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100730 if (!in)
731 in = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000732 } else {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100733 if (!out)
734 out = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000735 }
736 break;
737
738 default:
739 break;
740 }
741 }
Bjørn Morkff1632a2013-11-01 11:16:41 +0100742 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);
Alexey Orishko900d4952010-11-29 23:23:28 +0000750}
751
752static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
753{
754 if (ctx == NULL)
755 return;
756
Alexey Orishko900d4952010-11-29 23:23:28 +0000757 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
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500767 if (ctx->is_ndp16)
768 kfree(ctx->delayed_ndp16);
769 else
770 kfree(ctx->delayed_ndp32);
Enrico Mioso4a0e3e92015-07-08 13:05:57 +0200771
Alexey Orishko900d4952010-11-29 23:23:28 +0000772 kfree(ctx);
773}
774
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100775/* we need to override the usbnet change_mtu ndo for two reasons:
776 * - respect the negotiated maximum datagram size
777 * - avoid unwanted changes to rx and tx buffers
778 */
779int cdc_ncm_change_mtu(struct net_device *net, int new_mtu)
780{
781 struct usbnet *dev = netdev_priv(net);
Rafal Redzimski05a56482016-05-19 11:56:09 +0200782
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100783 net->mtu = new_mtu;
Rafal Redzimski05a56482016-05-19 11:56:09 +0200784 cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev));
785
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100786 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,
Miguel Rodríguez Pérez37a2ebd2020-07-15 20:40:59 +0200795 .ndo_set_rx_mode = usbnet_set_rx_mode,
Greg Ungererc8b5d122017-04-03 15:50:03 +1000796 .ndo_get_stats64 = usbnet_get_stats64,
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100797 .ndo_change_mtu = cdc_ncm_change_mtu,
798 .ndo_set_mac_address = eth_mac_addr,
799 .ndo_validate_addr = eth_validate_addr,
800};
801
Enrico Mioso4a0e3e92015-07-08 13:05:57 +0200802int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags)
Alexey Orishko900d4952010-11-29 23:23:28 +0000803{
804 struct cdc_ncm_ctx *ctx;
805 struct usb_driver *driver;
806 u8 *buf;
807 int len;
808 int temp;
809 u8 iface_no;
Oliver Neukum77b0a092015-09-07 16:05:39 +0200810 struct usb_cdc_parsed_header hdr;
Alexey Orishko900d4952010-11-29 23:23:28 +0000811
Thomas Meyerc7969842011-11-17 12:43:40 +0000812 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
Devendra Naga8f0923c2013-03-29 23:03:22 +0000813 if (!ctx)
814 return -ENOMEM;
Alexey Orishko900d4952010-11-29 23:23:28 +0000815
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000816 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
817 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
Ben Dooks8cc1da92018-10-11 14:03:32 +0100818 tasklet_init(&ctx->bh, cdc_ncm_txpath_bh, (unsigned long)dev);
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000819 atomic_set(&ctx->stop, 0);
Alexey Orishko900d4952010-11-29 23:23:28 +0000820 spin_lock_init(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +0000821
822 /* store ctx pointer in device data field */
823 dev->data[0] = (unsigned long)ctx;
824
Bjørn Mork9fe02342013-11-01 11:16:48 +0100825 /* only the control interface can be successfully probed */
826 ctx->control = intf;
827
Alexey Orishko900d4952010-11-29 23:23:28 +0000828 /* get some pointers */
829 driver = driver_of(intf);
830 buf = intf->cur_altsetting->extra;
831 len = intf->cur_altsetting->extralen;
832
Alexey Orishko900d4952010-11-29 23:23:28 +0000833 /* parse through descriptors associated with control interface */
Oliver Neukum77b0a092015-09-07 16:05:39 +0200834 cdc_parse_cdc_header(&hdr, intf, buf, len);
Alexey Orishko900d4952010-11-29 23:23:28 +0000835
Bjørn Mork6527f832015-11-23 14:32:10 +0100836 if (hdr.usb_cdc_union_desc)
837 ctx->data = usb_ifnum_to_if(dev->udev,
838 hdr.usb_cdc_union_desc->bSlaveInterface0);
Oliver Neukum77b0a092015-09-07 16:05:39 +0200839 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;
Alexey Orishko900d4952010-11-29 23:23:28 +0000843
Bjørn Mork9992c2e2013-01-21 05:50:38 +0000844 /* some buggy devices have an IAD but no CDC Union */
Bjørn Mork6527f832015-11-23 14:32:10 +0100845 if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
Bjørn Mork56a666d2013-01-25 23:36:59 +0000846 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");
Bjørn Mork9992c2e2013-01-21 05:50:38 +0000848 }
849
Alexey Orishko900d4952010-11-29 23:23:28 +0000850 /* check if we got everything */
Bjørn Morkf8afb732014-05-16 21:48:19 +0200851 if (!ctx->data) {
852 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000853 goto error;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100854 }
Bjørn Morkf8afb732014-05-16 21:48:19 +0200855 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 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000866
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000867 /* claim data interface, if different from control */
868 if (ctx->data != ctx->control) {
869 temp = usb_driver_claim_interface(driver, ctx->data, dev);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100870 if (temp) {
871 dev_dbg(&intf->dev, "failed to claim data intf\n");
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000872 goto error;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100873 }
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000874 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000875
876 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
877
Daniele Palmas7b8076c2016-12-07 14:07:48 +0100878 /* Device-specific flags */
879 ctx->drvflags = drvflags;
880
Bjørn Mork48906f62016-03-03 22:20:53 +0100881 /* Reset data interface. Some devices will not reset properly
882 * unless they are configured first. Toggle the altsetting to
Daniele Palmas7b8076c2016-12-07 14:07:48 +0100883 * force a reset.
884 * Some other devices do not work properly with this procedure
885 * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE
Bjørn Mork48906f62016-03-03 22:20:53 +0100886 */
Daniele Palmas7b8076c2016-12-07 14:07:48 +0100887 if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE))
888 usb_set_interface(dev->udev, iface_no, data_altsetting);
889
Alexey Orishko900d4952010-11-29 23:23:28 +0000890 temp = usb_set_interface(dev->udev, iface_no, 0);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100891 if (temp) {
892 dev_dbg(&intf->dev, "set interface failed\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000893 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100894 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000895
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200896 /* initialize basic device settings */
897 if (cdc_ncm_init(dev))
Bjørn Morkff0992e2014-03-17 16:25:18 +0100898 goto error2;
899
Bjørn Morkc086e702016-07-03 22:24:50 +0200900 /* Some firmwares need a pause here or they will silently fail
901 * to set up the interface properly. This value was decided
902 * empirically on a Sierra Wireless MC7455 running 02.08.02.00
903 * firmware.
904 */
905 usleep_range(10000, 20000);
906
Alexey Orishko900d4952010-11-29 23:23:28 +0000907 /* configure data interface */
Greg Suarez38396e42012-10-22 10:56:31 +0000908 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100909 if (temp) {
910 dev_dbg(&intf->dev, "set interface failed\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000911 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100912 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000913
Bjørn Morkff1632a2013-11-01 11:16:41 +0100914 cdc_ncm_find_endpoints(dev, ctx->data);
915 cdc_ncm_find_endpoints(dev, ctx->control);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100916 if (!dev->in || !dev->out || !dev->status) {
917 dev_dbg(&intf->dev, "failed to collect endpoints\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000918 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100919 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000920
Alexey Orishko900d4952010-11-29 23:23:28 +0000921 usb_set_intfdata(ctx->data, dev);
922 usb_set_intfdata(ctx->control, dev);
Alexey Orishko900d4952010-11-29 23:23:28 +0000923
Greg Suarez38396e42012-10-22 10:56:31 +0000924 if (ctx->ether_desc) {
925 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100926 if (temp) {
927 dev_dbg(&intf->dev, "failed to get mac address\n");
Greg Suarez38396e42012-10-22 10:56:31 +0000928 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100929 }
930 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
Greg Suarez38396e42012-10-22 10:56:31 +0000931 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000932
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200933 /* finish setting up the device specific data */
934 cdc_ncm_setup(dev);
Bjørn Morkff0992e2014-03-17 16:25:18 +0100935
Enrico Mioso4a0e3e92015-07-08 13:05:57 +0200936 /* Allocate the delayed NDP if needed. */
937 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
Alexander Bersenev0fa81b32020-03-06 01:33:16 +0500938 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 }
Enrico Mioso4a0e3e92015-07-08 13:05:57 +0200947 dev_info(&intf->dev, "NDP will be placed at end of frame for this device.");
948 }
949
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200950 /* override ethtool_ops */
951 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
952
Bjørn Mork289507d2014-05-30 09:31:06 +0200953 /* add our sysfs attrs */
954 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group;
955
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100956 /* must handle MTU changes */
957 dev->net->netdev_ops = &cdc_ncm_netdev_ops;
Jarod Wilsonf77f0ae2016-10-20 13:55:17 -0400958 dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev);
Bjørn Mork1dfddff52015-12-23 13:42:43 +0100959
Alexey Orishko900d4952010-11-29 23:23:28 +0000960 return 0;
961
Alexey Orishko19694ac2011-05-24 05:26:13 +0000962error2:
963 usb_set_intfdata(ctx->control, NULL);
964 usb_set_intfdata(ctx->data, NULL);
Bjørn Mork6b4ef602013-01-21 05:50:40 +0000965 if (ctx->data != ctx->control)
966 usb_driver_release_interface(driver, ctx->data);
Alexey Orishko900d4952010-11-29 23:23:28 +0000967error:
968 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
969 dev->data[0] = 0;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100970 dev_info(&intf->dev, "bind() failure\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000971 return -ENODEV;
972}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000973EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
Alexey Orishko900d4952010-11-29 23:23:28 +0000974
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000975void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
Alexey Orishko900d4952010-11-29 23:23:28 +0000976{
977 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko19694ac2011-05-24 05:26:13 +0000978 struct usb_driver *driver = driver_of(intf);
Alexey Orishko900d4952010-11-29 23:23:28 +0000979
980 if (ctx == NULL)
981 return; /* no setup */
982
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000983 atomic_set(&ctx->stop, 1);
984
Daniel Lezcano2aee1672018-06-19 16:14:30 +0200985 hrtimer_cancel(&ctx->tx_timer);
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000986
987 tasklet_kill(&ctx->bh);
988
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000989 /* handle devices with combined control and data interface */
990 if (ctx->control == ctx->data)
991 ctx->data = NULL;
992
Alexey Orishko19694ac2011-05-24 05:26:13 +0000993 /* disconnect master --> disconnect slave */
994 if (intf == ctx->control && ctx->data) {
995 usb_set_intfdata(ctx->data, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +0000996 usb_driver_release_interface(driver, ctx->data);
Alexey Orishko19694ac2011-05-24 05:26:13 +0000997 ctx->data = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000998
Alexey Orishko19694ac2011-05-24 05:26:13 +0000999 } else if (intf == ctx->data && ctx->control) {
1000 usb_set_intfdata(ctx->control, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +00001001 usb_driver_release_interface(driver, ctx->control);
Alexey Orishko19694ac2011-05-24 05:26:13 +00001002 ctx->control = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +00001003 }
1004
Bjørn Mork3e515662013-11-01 11:16:40 +01001005 usb_set_intfdata(intf, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +00001006 cdc_ncm_free(ctx);
1007}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001008EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
Alexey Orishko900d4952010-11-29 23:23:28 +00001009
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001010/* Return the number of the MBIM control interface altsetting iff it
1011 * is preferred and available,
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001012 */
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001013u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
Greg Suarez38396e42012-10-22 10:56:31 +00001014{
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001015 struct usb_host_interface *alt;
Greg Suarez38396e42012-10-22 10:56:31 +00001016
Bjørn Morkbd329e12012-10-22 10:56:38 +00001017 /* The MBIM spec defines a NCM compatible default altsetting,
1018 * which we may have matched:
1019 *
1020 * "Functions that implement both NCM 1.0 and MBIM (an
1021 * “NCM/MBIM function”) according to this recommendation
1022 * shall provide two alternate settings for the
1023 * Communication Interface. Alternate setting 0, and the
1024 * associated class and endpoint descriptors, shall be
1025 * constructed according to the rules given for the
1026 * Communication Interface in section 5 of [USBNCM10].
1027 * Alternate setting 1, and the associated class and
1028 * endpoint descriptors, shall be constructed according to
1029 * the rules given in section 6 (USB Device Model) of this
1030 * specification."
Bjørn Morkbd329e12012-10-22 10:56:38 +00001031 */
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001032 if (intf->num_altsetting < 2)
1033 return intf->cur_altsetting->desc.bAlternateSetting;
1034
1035 if (prefer_mbim) {
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001036 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001037 if (alt && cdc_ncm_comm_intf_is_mbim(alt))
1038 return CDC_NCM_COMM_ALTSETTING_MBIM;
Bjørn Morkf350ca02013-02-13 12:09:52 +00001039 }
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001040 return CDC_NCM_COMM_ALTSETTING_NCM;
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001041}
1042EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
1043
1044static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
1045{
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001046 /* MBIM backwards compatible function? */
Bjørn Mork50a0ffaf2014-05-11 10:47:15 +02001047 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
Bjørn Mork1e8bbe62013-03-14 01:05:13 +00001048 return -ENODEV;
Bjørn Morkbd329e12012-10-22 10:56:38 +00001049
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001050 /* The NCM data altsetting is fixed, so we hard-coded it.
1051 * Additionally, generic NCM devices are assumed to accept arbitrarily
1052 * placed NDP.
1053 */
Bjørn Mork4d06dd52016-03-07 21:15:36 +01001054 return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0);
Greg Suarez38396e42012-10-22 10:56:31 +00001055}
1056
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001057static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
Alexey Orishko900d4952010-11-29 23:23:28 +00001058{
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001059 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)
Johannes Bergb080db52017-06-16 14:29:19 +02001064 skb_put_zero(skb, align);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001065}
1066
1067/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
1068 * allocating a new one within skb
1069 */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001070static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001071{
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
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001076 /* If NDP should be moved to the end of the NCM package, we can't follow the
1077 * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and
1078 * the wNdpIndex field in the header is actually not consistent with reality. It will be later.
1079 */
Bjørn Morkf8c0cfa2015-12-05 13:01:50 +01001080 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001081 if (ctx->delayed_ndp16->dwSignature == sign)
1082 return ctx->delayed_ndp16;
1083
Bjørn Morkf8c0cfa2015-12-05 13:01:50 +01001084 /* We can only push a single NDP to the end. Return
1085 * NULL to send what we've already got and queue this
1086 * skb for later.
1087 */
1088 else if (ctx->delayed_ndp16->dwSignature)
1089 return NULL;
1090 }
1091
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001092 /* follow the chain of NDPs, looking for a match */
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 /* align new NDP */
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001101 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
Jim Baxtere1069bb2017-06-28 21:35:29 +01001102 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001103
1104 /* verify that there is room for the NDP and the datagram (reserve) */
Jim Baxtere1069bb2017-06-28 21:35:29 +01001105 if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size)
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001106 return NULL;
1107
1108 /* link to it */
1109 if (ndp16)
1110 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
1111 else
1112 nth16->wNdpIndex = cpu_to_le16(skb->len);
1113
1114 /* push a new empty NDP */
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001115 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
yuan linyuad941e62017-06-18 22:49:30 +08001116 ndp16 = skb_put_zero(skb, ctx->max_ndp_size);
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001117 else
1118 ndp16 = ctx->delayed_ndp16;
1119
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001120 ndp16->dwSignature = sign;
1121 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
1122 return ndp16;
Alexey Orishko900d4952010-11-29 23:23:28 +00001123}
1124
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001125static 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 /* If NDP should be moved to the end of the NCM package, we can't follow the
1132 * NTH32 header as we would normally do. NDP isn't written to the SKB yet, and
1133 * the wNdpIndex field in the header is actually not consistent with reality. It will be later.
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 /* We can only push a single NDP to the end. Return
1140 * NULL to send what we've already got and queue this
1141 * skb for later.
1142 */
1143 else if (ctx->delayed_ndp32->dwSignature)
1144 return NULL;
1145 }
1146
1147 /* follow the chain of NDPs, looking for a match */
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 /* align new NDP */
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 /* verify that there is room for the NDP and the datagram (reserve) */
1160 if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size)
1161 return NULL;
1162
1163 /* link to it */
1164 if (ndp32)
1165 ndp32->dwNextNdpIndex = cpu_to_le32(skb->len);
1166 else
1167 nth32->dwNdpIndex = cpu_to_le32(skb->len);
1168
1169 /* push a new empty NDP */
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;
Alexander Bersenev5d0ab062020-03-14 10:33:24 +05001176 ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32));
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001177 return ndp32;
1178}
1179
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001180struct sk_buff *
Bjørn Morkbed6f762013-11-01 11:16:42 +01001181cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
Alexey Orishko900d4952010-11-29 23:23:28 +00001182{
Bjørn Morkbed6f762013-11-01 11:16:42 +01001183 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001184 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;
Alexey Orishko900d4952010-11-29 23:23:28 +00001192 struct sk_buff *skb_out;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001193 u16 n = 0, index, ndplen;
Alexey Orishko84e77a82011-02-07 09:45:10 +00001194 u8 ready2send = 0;
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001195 u32 delayed_ndp_size;
Jim Baxteraeca3a72017-05-08 13:49:57 +01001196 size_t padding_count;
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001197
1198 /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated
1199 * accordingly. Otherwise, we should check here.
1200 */
1201 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)
Bjørn Mork49c2c3f2018-06-08 09:15:24 +02001202 delayed_ndp_size = ALIGN(ctx->max_ndp_size, ctx->tx_ndp_modulus);
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001203 else
1204 delayed_ndp_size = 0;
Alexey Orishko900d4952010-11-29 23:23:28 +00001205
1206 /* if there is a remaining skb, it gets priority */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001207 if (skb != NULL) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001208 swap(skb, ctx->tx_rem_skb);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001209 swap(sign, ctx->tx_rem_sign);
1210 } else {
Alexey Orishko84e77a82011-02-07 09:45:10 +00001211 ready2send = 1;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001212 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001213
1214 /* check if we are resuming an OUT skb */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001215 skb_out = ctx->tx_curr_skb;
Alexey Orishko900d4952010-11-29 23:23:28 +00001216
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001217 /* allocate a new OUT skb */
1218 if (!skb_out) {
Jim Baxtere1069bb2017-06-28 21:35:29 +01001219 if (ctx->tx_low_mem_val == 0) {
1220 ctx->tx_curr_size = ctx->tx_max;
1221 skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
1222 /* If the memory allocation fails we will wait longer
1223 * each time before attempting another full size
1224 * allocation again to not overload the system
1225 * further.
1226 */
1227 if (skb_out == NULL) {
1228 ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1,
1229 (unsigned)CDC_NCM_LOW_MEM_MAX_CNT);
1230 ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt;
Alexey Orishko900d4952010-11-29 23:23:28 +00001231 }
Jim Baxtere1069bb2017-06-28 21:35:29 +01001232 }
1233 if (skb_out == NULL) {
1234 /* See if a very small allocation is possible.
1235 * We will send this packet immediately and hope
1236 * that there is more memory available later.
1237 */
1238 if (skb)
1239 ctx->tx_curr_size = max(skb->len,
1240 (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE);
1241 else
1242 ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE;
1243 skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
1244
1245 /* No allocation possible so we will abort */
1246 if (skb_out == NULL) {
1247 if (skb != NULL) {
1248 dev_kfree_skb_any(skb);
1249 dev->net->stats.tx_dropped++;
1250 }
1251 goto exit_no_skb;
1252 }
1253 ctx->tx_low_mem_val--;
Alexey Orishko900d4952010-11-29 23:23:28 +00001254 }
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001255 if (ctx->is_ndp16) {
1256 /* fill out the initial 16-bit NTB header */
1257 nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16));
1258 nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
1259 nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
1260 nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
1261 } else {
1262 /* fill out the initial 32-bit NTB header */
1263 nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32));
1264 nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN);
1265 nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32));
1266 nth.nth32->wSequence = cpu_to_le16(ctx->tx_seq++);
1267 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001268
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001269 /* count total number of frames in this NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001270 ctx->tx_curr_frame_num = 0;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001271
1272 /* recent payload counter for this skb_out */
1273 ctx->tx_curr_frame_payload = 0;
Alexey Orishko900d4952010-11-29 23:23:28 +00001274 }
1275
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001276 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
1277 /* send any remaining skb first */
Alexey Orishko900d4952010-11-29 23:23:28 +00001278 if (skb == NULL) {
1279 skb = ctx->tx_rem_skb;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001280 sign = ctx->tx_rem_sign;
Alexey Orishko900d4952010-11-29 23:23:28 +00001281 ctx->tx_rem_skb = NULL;
1282
1283 /* check for end of skb */
1284 if (skb == NULL)
1285 break;
1286 }
1287
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001288 /* get the appropriate NDP for this skb */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001289 if (ctx->is_ndp16)
1290 ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
1291 else
1292 ndp.ndp32 = cdc_ncm_ndp32(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001293
1294 /* align beginning of next frame */
Jim Baxtere1069bb2017-06-28 21:35:29 +01001295 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001296
1297 /* check if we had enough room left for both NDP and frame */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001298 if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) ||
1299 skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001300 if (n == 0) {
1301 /* won't fit, MTU problem? */
1302 dev_kfree_skb_any(skb);
1303 skb = NULL;
Bjørn Morkbed6f762013-11-01 11:16:42 +01001304 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001305 } else {
1306 /* no room for skb - store for later */
1307 if (ctx->tx_rem_skb != NULL) {
1308 dev_kfree_skb_any(ctx->tx_rem_skb);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001309 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001310 }
1311 ctx->tx_rem_skb = skb;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001312 ctx->tx_rem_sign = sign;
Alexey Orishko900d4952010-11-29 23:23:28 +00001313 skb = NULL;
Alexey Orishko84e77a82011-02-07 09:45:10 +00001314 ready2send = 1;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001315 ctx->tx_reason_ntb_full++; /* count reason for transmitting */
Alexey Orishko900d4952010-11-29 23:23:28 +00001316 }
1317 break;
1318 }
1319
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001320 /* calculate frame number withing this NDP */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001321 if (ctx->is_ndp16) {
1322 ndplen = le16_to_cpu(ndp.ndp16->wLength);
1323 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
Alexey Orishko900d4952010-11-29 23:23:28 +00001324
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001325 /* OK, add this skb */
1326 ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
1327 ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
1328 ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
1329 } else {
1330 ndplen = le16_to_cpu(ndp.ndp32->wLength);
1331 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1;
1332
1333 ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len);
1334 ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len);
1335 ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32));
1336 }
Johannes Berg59ae1d12017-06-16 14:29:20 +02001337 skb_put_data(skb_out, skb->data, skb->len);
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001338 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */
Alexey Orishko900d4952010-11-29 23:23:28 +00001339 dev_kfree_skb_any(skb);
1340 skb = NULL;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001341
1342 /* send now if this NDP is full */
1343 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
1344 ready2send = 1;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001345 ctx->tx_reason_ndp_full++; /* count reason for transmitting */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001346 break;
1347 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001348 }
1349
1350 /* free up any dangling skb */
1351 if (skb != NULL) {
1352 dev_kfree_skb_any(skb);
1353 skb = NULL;
Bjørn Morkbed6f762013-11-01 11:16:42 +01001354 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001355 }
1356
1357 ctx->tx_curr_frame_num = n;
1358
1359 if (n == 0) {
1360 /* wait for more frames */
1361 /* push variables */
1362 ctx->tx_curr_skb = skb_out;
Alexey Orishko900d4952010-11-29 23:23:28 +00001363 goto exit_no_skb;
1364
Bjørn Mork6c4e5482014-05-16 21:48:22 +02001365 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001366 /* wait for more frames */
1367 /* push variables */
1368 ctx->tx_curr_skb = skb_out;
Alexey Orishko900d4952010-11-29 23:23:28 +00001369 /* set the pending count */
1370 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001371 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
Alexey Orishko900d4952010-11-29 23:23:28 +00001372 goto exit_no_skb;
1373
1374 } else {
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001375 if (n == ctx->tx_max_datagrams)
1376 ctx->tx_reason_max_datagram++; /* count reason for transmitting */
Alexey Orishko900d4952010-11-29 23:23:28 +00001377 /* frame goes out */
1378 /* variables will be reset at next call */
1379 }
1380
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001381 /* If requested, put NDP at end of frame. */
1382 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001383 if (ctx->is_ndp16) {
1384 nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1385 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
1386 nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len);
1387 skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size);
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001388
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001389 /* Zero out delayed NDP - signature checking will naturally fail. */
1390 ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size);
1391 } else {
1392 nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
1393 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
1394 nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len);
1395 skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size);
1396
1397 ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size);
1398 }
Enrico Mioso4a0e3e92015-07-08 13:05:57 +02001399 }
1400
Bjørn Mork43e4c6d2014-05-16 21:48:24 +02001401 /* If collected data size is less or equal ctx->min_tx_pkt
Bjørn Mork205722262013-11-01 11:16:38 +01001402 * bytes, we send buffers as it is. If we get more data, it
1403 * would be more efficient for USB HS mobile device with DMA
1404 * engine to receive a full size NTB, than canceling DMA
1405 * transfer and receiving a short packet.
Bjørn Mork4d619f622013-11-01 11:16:49 +01001406 *
1407 * This optimization support is pointless if we end up sending
1408 * a ZLP after full sized NTBs.
Alexey Orishko900d4952010-11-29 23:23:28 +00001409 */
Bjørn Mork4d619f622013-11-01 11:16:49 +01001410 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
Jim Baxteraeca3a72017-05-08 13:49:57 +01001411 skb_out->len > ctx->min_tx_pkt) {
Jim Baxtere1069bb2017-06-28 21:35:29 +01001412 padding_count = ctx->tx_curr_size - skb_out->len;
Johannes Bergb080db52017-06-16 14:29:19 +02001413 skb_put_zero(skb_out, padding_count);
Jim Baxtere1069bb2017-06-28 21:35:29 +01001414 } else if (skb_out->len < ctx->tx_curr_size &&
Jim Baxteraeca3a72017-05-08 13:49:57 +01001415 (skb_out->len % dev->maxpacket) == 0) {
Johannes Berg634fef62017-06-16 14:29:24 +02001416 skb_put_u8(skb_out, 0); /* force short packet */
Jim Baxteraeca3a72017-05-08 13:49:57 +01001417 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001418
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001419 /* set final frame length */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001420 if (ctx->is_ndp16) {
1421 nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1422 nth.nth16->wBlockLength = cpu_to_le16(skb_out->len);
1423 } else {
1424 nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
1425 nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len);
1426 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001427
1428 /* return skb */
1429 ctx->tx_curr_skb = NULL;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001430
1431 /* keep private stats: framing overhead and number of NTBs */
1432 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
1433 ctx->tx_ntbs++;
1434
Ben Hutchings7a1e8902015-03-25 21:41:33 +01001435 /* usbnet will count all the framing overhead by default.
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001436 * Adjust the stats so that the tx_bytes counter show real
1437 * payload data instead.
1438 */
Ben Hutchings7a1e8902015-03-25 21:41:33 +01001439 usbnet_set_skb_tx_stats(skb_out, n,
Bjørn Mork44f67312015-05-22 13:15:22 +02001440 (long)ctx->tx_curr_frame_payload - skb_out->len);
Ben Hutchings1e9e39f2015-02-26 19:34:37 +00001441
Alexey Orishko900d4952010-11-29 23:23:28 +00001442 return skb_out;
1443
1444exit_no_skb:
Bjørn Mork046c6592014-05-16 21:48:29 +02001445 /* Start timer, if there is a remaining non-empty skb */
1446 if (ctx->tx_curr_skb != NULL && n > 0)
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001447 cdc_ncm_tx_timeout_start(ctx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001448 return NULL;
1449}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001450EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
Alexey Orishko900d4952010-11-29 23:23:28 +00001451
1452static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
1453{
1454 /* start timer, if not already started */
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001455 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
1456 hrtimer_start(&ctx->tx_timer,
Thomas Gleixner8b0e1952016-12-25 12:30:41 +01001457 ctx->timer_interval,
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001458 HRTIMER_MODE_REL);
Alexey Orishko900d4952010-11-29 23:23:28 +00001459}
1460
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001461static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
Alexey Orishko900d4952010-11-29 23:23:28 +00001462{
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001463 struct cdc_ncm_ctx *ctx =
1464 container_of(timer, struct cdc_ncm_ctx, tx_timer);
Alexey Orishko900d4952010-11-29 23:23:28 +00001465
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001466 if (!atomic_read(&ctx->stop))
1467 tasklet_schedule(&ctx->bh);
1468 return HRTIMER_NORESTART;
1469}
1470
1471static void cdc_ncm_txpath_bh(unsigned long param)
1472{
Bjørn Morkbed6f762013-11-01 11:16:42 +01001473 struct usbnet *dev = (struct usbnet *)param;
1474 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001475
1476 spin_lock_bh(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001477 if (ctx->tx_timer_pending != 0) {
1478 ctx->tx_timer_pending--;
Alexey Orishko900d4952010-11-29 23:23:28 +00001479 cdc_ncm_tx_timeout_start(ctx);
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001480 spin_unlock_bh(&ctx->mtx);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001481 } else if (dev->net != NULL) {
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001482 ctx->tx_reason_timeout++; /* count reason for transmitting */
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001483 spin_unlock_bh(&ctx->mtx);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001484 netif_tx_lock_bh(dev->net);
1485 usbnet_start_xmit(NULL, dev->net);
1486 netif_tx_unlock_bh(dev->net);
Bjørn Mork7b1e0cb2012-10-25 21:44:09 +00001487 } else {
1488 spin_unlock_bh(&ctx->mtx);
Alexey Orishkof742aa82011-01-17 07:07:25 +00001489 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001490}
1491
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001492struct sk_buff *
Alexey Orishko900d4952010-11-29 23:23:28 +00001493cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1494{
1495 struct sk_buff *skb_out;
1496 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko900d4952010-11-29 23:23:28 +00001497
1498 /*
1499 * The Ethernet API we are using does not support transmitting
1500 * multiple Ethernet frames in a single call. This driver will
1501 * accumulate multiple Ethernet frames and send out a larger
1502 * USB frame when the USB buffer is full or when a single jiffies
1503 * timeout happens.
1504 */
1505 if (ctx == NULL)
1506 goto error;
1507
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001508 spin_lock_bh(&ctx->mtx);
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001509
1510 if (ctx->is_ndp16)
1511 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
1512 else
1513 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN));
1514
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001515 spin_unlock_bh(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001516 return skb_out;
1517
1518error:
1519 if (skb != NULL)
1520 dev_kfree_skb_any(skb);
1521
1522 return NULL;
1523}
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001524EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
Alexey Orishko900d4952010-11-29 23:23:28 +00001525
Bjørn Morkff06ab12012-10-22 10:56:33 +00001526/* verify NTB header and return offset of first NDP, or negative error */
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001527int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
Alexey Orishko900d4952010-11-29 23:23:28 +00001528{
Bjørn Morkae223cd2013-11-01 11:16:54 +01001529 struct usbnet *dev = netdev_priv(skb_in->dev);
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001530 struct usb_cdc_ncm_nth16 *nth16;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001531 int len;
1532 int ret = -EINVAL;
Alexey Orishko900d4952010-11-29 23:23:28 +00001533
Alexey Orishko900d4952010-11-29 23:23:28 +00001534 if (ctx == NULL)
1535 goto error;
1536
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001537 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
1538 sizeof(struct usb_cdc_ncm_ndp16))) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001539 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
Alexey Orishko900d4952010-11-29 23:23:28 +00001540 goto error;
1541 }
1542
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001543 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
Alexey Orishko900d4952010-11-29 23:23:28 +00001544
Bjørn Mork986e10d2013-11-01 11:16:56 +01001545 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
Bjørn Mork5448d752013-11-01 11:16:55 +01001546 netif_dbg(dev, rx_err, dev->net,
1547 "invalid NTH16 signature <%#010x>\n",
1548 le32_to_cpu(nth16->dwSignature));
Alexey Orishko900d4952010-11-29 23:23:28 +00001549 goto error;
1550 }
1551
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001552 len = le16_to_cpu(nth16->wBlockLength);
1553 if (len > ctx->rx_max) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001554 netif_dbg(dev, rx_err, dev->net,
1555 "unsupported NTB block length %u/%u\n", len,
1556 ctx->rx_max);
Alexey Orishko900d4952010-11-29 23:23:28 +00001557 goto error;
1558 }
1559
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001560 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
Bjørn Morkae223cd2013-11-01 11:16:54 +01001561 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
1562 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
1563 netif_dbg(dev, rx_err, dev->net,
1564 "sequence number glitch prev=%d curr=%d\n",
1565 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001566 }
1567 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
1568
Bjørn Morkff06ab12012-10-22 10:56:33 +00001569 ret = le16_to_cpu(nth16->wNdpIndex);
1570error:
1571 return ret;
1572}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001573EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001574
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001575int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
1576{
1577 struct usbnet *dev = netdev_priv(skb_in->dev);
1578 struct usb_cdc_ncm_nth32 *nth32;
1579 int len;
1580 int ret = -EINVAL;
1581
1582 if (ctx == NULL)
1583 goto error;
1584
1585 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) +
1586 sizeof(struct usb_cdc_ncm_ndp32))) {
1587 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
1588 goto error;
1589 }
1590
1591 nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data;
1592
1593 if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) {
1594 netif_dbg(dev, rx_err, dev->net,
1595 "invalid NTH32 signature <%#010x>\n",
1596 le32_to_cpu(nth32->dwSignature));
1597 goto error;
1598 }
1599
1600 len = le32_to_cpu(nth32->dwBlockLength);
1601 if (len > ctx->rx_max) {
1602 netif_dbg(dev, rx_err, dev->net,
1603 "unsupported NTB block length %u/%u\n", len,
1604 ctx->rx_max);
1605 goto error;
1606 }
1607
1608 if ((ctx->rx_seq + 1) != le16_to_cpu(nth32->wSequence) &&
1609 (ctx->rx_seq || le16_to_cpu(nth32->wSequence)) &&
1610 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) {
1611 netif_dbg(dev, rx_err, dev->net,
1612 "sequence number glitch prev=%d curr=%d\n",
1613 ctx->rx_seq, le16_to_cpu(nth32->wSequence));
1614 }
1615 ctx->rx_seq = le16_to_cpu(nth32->wSequence);
1616
1617 ret = le32_to_cpu(nth32->dwNdpIndex);
1618error:
1619 return ret;
1620}
1621EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32);
1622
Bjørn Morkff06ab12012-10-22 10:56:33 +00001623/* verify NDP header and return number of datagrams, or negative error */
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001624int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
Bjørn Morkff06ab12012-10-22 10:56:33 +00001625{
Bjørn Morkae223cd2013-11-01 11:16:54 +01001626 struct usbnet *dev = netdev_priv(skb_in->dev);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001627 struct usb_cdc_ncm_ndp16 *ndp16;
1628 int ret = -EINVAL;
1629
Bjørn Mork75d67d32012-10-22 10:56:32 +00001630 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001631 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1632 ndpoffset);
Alexey Orishko900d4952010-11-29 23:23:28 +00001633 goto error;
1634 }
Bjørn Mork75d67d32012-10-22 10:56:32 +00001635 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
Alexey Orishko900d4952010-11-29 23:23:28 +00001636
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001637 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001638 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
1639 le16_to_cpu(ndp16->wLength));
Bjørn Morkff06ab12012-10-22 10:56:33 +00001640 goto error;
Alexey Orishko900d4952010-11-29 23:23:28 +00001641 }
1642
Bjørn Morkff06ab12012-10-22 10:56:33 +00001643 ret = ((le16_to_cpu(ndp16->wLength) -
Alexey Orishko900d4952010-11-29 23:23:28 +00001644 sizeof(struct usb_cdc_ncm_ndp16)) /
1645 sizeof(struct usb_cdc_ncm_dpe16));
Bjørn Morkff06ab12012-10-22 10:56:33 +00001646 ret--; /* we process NDP entries except for the last one */
Alexey Orishko900d4952010-11-29 23:23:28 +00001647
Bjørn Morkae223cd2013-11-01 11:16:54 +01001648 if ((sizeof(struct usb_cdc_ncm_ndp16) +
1649 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
1650 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001651 ret = -EINVAL;
Alexey Orishko900d4952010-11-29 23:23:28 +00001652 }
1653
Bjørn Morkff06ab12012-10-22 10:56:33 +00001654error:
1655 return ret;
1656}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001657EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001658
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001659/* verify NDP header and return number of datagrams, or negative error */
1660int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset)
1661{
1662 struct usbnet *dev = netdev_priv(skb_in->dev);
1663 struct usb_cdc_ncm_ndp32 *ndp32;
1664 int ret = -EINVAL;
1665
1666 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) {
1667 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1668 ndpoffset);
1669 goto error;
1670 }
1671 ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
1672
1673 if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) {
1674 netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n",
1675 le16_to_cpu(ndp32->wLength));
1676 goto error;
1677 }
1678
1679 ret = ((le16_to_cpu(ndp32->wLength) -
1680 sizeof(struct usb_cdc_ncm_ndp32)) /
1681 sizeof(struct usb_cdc_ncm_dpe32));
1682 ret--; /* we process NDP entries except for the last one */
1683
1684 if ((sizeof(struct usb_cdc_ncm_ndp32) +
1685 ret * (sizeof(struct usb_cdc_ncm_dpe32))) > skb_in->len) {
1686 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
1687 ret = -EINVAL;
1688 }
1689
1690error:
1691 return ret;
1692}
1693EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp32);
1694
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001695int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
Bjørn Morkff06ab12012-10-22 10:56:33 +00001696{
1697 struct sk_buff *skb;
1698 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1699 int len;
1700 int nframes;
1701 int x;
1702 int offset;
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001703 union {
1704 struct usb_cdc_ncm_ndp16 *ndp16;
1705 struct usb_cdc_ncm_ndp32 *ndp32;
1706 } ndp;
1707 union {
1708 struct usb_cdc_ncm_dpe16 *dpe16;
1709 struct usb_cdc_ncm_dpe32 *dpe32;
1710 } dpe;
1711
Bjørn Morkff06ab12012-10-22 10:56:33 +00001712 int ndpoffset;
1713 int loopcount = 50; /* arbitrary max preventing infinite loop */
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001714 u32 payload = 0;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001715
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001716 if (ctx->is_ndp16)
1717 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
1718 else
1719 ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in);
1720
Bjørn Morkff06ab12012-10-22 10:56:33 +00001721 if (ndpoffset < 0)
1722 goto error;
1723
1724next_ndp:
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001725 if (ctx->is_ndp16) {
1726 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
1727 if (nframes < 0)
1728 goto error;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001729
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001730 ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001731
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001732 if (ndp.ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
1733 netif_dbg(dev, rx_err, dev->net,
1734 "invalid DPT16 signature <%#010x>\n",
1735 le32_to_cpu(ndp.ndp16->dwSignature));
1736 goto err_ndp;
1737 }
1738 dpe.dpe16 = ndp.ndp16->dpe16;
1739 } else {
1740 nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset);
1741 if (nframes < 0)
1742 goto error;
1743
1744 ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
1745
1746 if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) {
1747 netif_dbg(dev, rx_err, dev->net,
1748 "invalid DPT32 signature <%#010x>\n",
1749 le32_to_cpu(ndp.ndp32->dwSignature));
1750 goto err_ndp;
1751 }
1752 dpe.dpe32 = ndp.ndp32->dpe32;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001753 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001754
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001755 for (x = 0; x < nframes; x++) {
1756 if (ctx->is_ndp16) {
1757 offset = le16_to_cpu(dpe.dpe16->wDatagramIndex);
1758 len = le16_to_cpu(dpe.dpe16->wDatagramLength);
1759 } else {
1760 offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex);
1761 len = le32_to_cpu(dpe.dpe32->dwDatagramLength);
1762 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001763
1764 /*
1765 * CDC NCM ch. 3.7
1766 * All entries after first NULL entry are to be ignored
1767 */
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001768 if ((offset == 0) || (len == 0)) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001769 if (!x)
Bjørn Mork75d67d32012-10-22 10:56:32 +00001770 goto err_ndp; /* empty NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001771 break;
1772 }
1773
1774 /* sanity checking */
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001775 if (((offset + len) > skb_in->len) ||
1776 (len > ctx->rx_max) || (len < ETH_HLEN)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001777 netif_dbg(dev, rx_err, dev->net,
1778 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
1779 x, offset, len, skb_in);
Alexey Orishko900d4952010-11-29 23:23:28 +00001780 if (!x)
Bjørn Mork75d67d32012-10-22 10:56:32 +00001781 goto err_ndp;
Alexey Orishko900d4952010-11-29 23:23:28 +00001782 break;
1783
1784 } else {
Bjørn Mork1e2c6112014-05-30 09:31:03 +02001785 /* create a fresh copy to reduce truesize */
1786 skb = netdev_alloc_skb_ip_align(dev->net, len);
Jesper Juhl9e567902011-01-13 11:40:11 +00001787 if (!skb)
1788 goto error;
Johannes Berg59ae1d12017-06-16 14:29:20 +02001789 skb_put_data(skb, skb_in->data + offset, len);
Alexey Orishko900d4952010-11-29 23:23:28 +00001790 usbnet_skb_return(dev, skb);
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001791 payload += len; /* count payload bytes in this NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001792 }
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001793
1794 if (ctx->is_ndp16)
1795 dpe.dpe16++;
1796 else
1797 dpe.dpe32++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001798 }
Bjørn Mork75d67d32012-10-22 10:56:32 +00001799err_ndp:
1800 /* are there more NDPs to process? */
Alexander Bersenev0fa81b32020-03-06 01:33:16 +05001801 if (ctx->is_ndp16)
1802 ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex);
1803 else
1804 ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex);
1805
Bjørn Mork75d67d32012-10-22 10:56:32 +00001806 if (ndpoffset && loopcount--)
1807 goto next_ndp;
1808
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001809 /* update stats */
1810 ctx->rx_overhead += skb_in->len - payload;
1811 ctx->rx_ntbs++;
1812
Alexey Orishko900d4952010-11-29 23:23:28 +00001813 return 1;
1814error:
1815 return 0;
1816}
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001817EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
Alexey Orishko900d4952010-11-29 23:23:28 +00001818
1819static void
Bjørn Morkbed6f762013-11-01 11:16:42 +01001820cdc_ncm_speed_change(struct usbnet *dev,
Alexey Orishko84e77a82011-02-07 09:45:10 +00001821 struct usb_cdc_speed_change *data)
Alexey Orishko900d4952010-11-29 23:23:28 +00001822{
Alexey Orishko84e77a82011-02-07 09:45:10 +00001823 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1824 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
Alexey Orishko900d4952010-11-29 23:23:28 +00001825
1826 /*
1827 * Currently the USB-NET API does not support reporting the actual
1828 * device speed. Do print it instead.
1829 */
Bjørn Morkf3028c52013-11-01 11:16:44 +01001830 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001831 netif_info(dev, link, dev->net,
Bjørn Mork916f7642014-05-16 21:48:27 +02001832 "%u mbit/s downlink %u mbit/s uplink\n",
1833 (unsigned int)(rx_speed / 1000000U),
1834 (unsigned int)(tx_speed / 1000000U));
Bjørn Morkf3028c52013-11-01 11:16:44 +01001835 } else {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001836 netif_info(dev, link, dev->net,
Bjørn Mork916f7642014-05-16 21:48:27 +02001837 "%u kbit/s downlink %u kbit/s uplink\n",
1838 (unsigned int)(rx_speed / 1000U),
1839 (unsigned int)(tx_speed / 1000U));
Alexey Orishko900d4952010-11-29 23:23:28 +00001840 }
1841}
1842
1843static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1844{
Alexey Orishko900d4952010-11-29 23:23:28 +00001845 struct usb_cdc_notification *event;
1846
Alexey Orishko900d4952010-11-29 23:23:28 +00001847 if (urb->actual_length < sizeof(*event))
1848 return;
1849
1850 /* test for split data in 8-byte chunks */
1851 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
Bjørn Morkbed6f762013-11-01 11:16:42 +01001852 cdc_ncm_speed_change(dev,
Alexey Orishko84e77a82011-02-07 09:45:10 +00001853 (struct usb_cdc_speed_change *)urb->transfer_buffer);
Alexey Orishko900d4952010-11-29 23:23:28 +00001854 return;
1855 }
1856
1857 event = urb->transfer_buffer;
1858
1859 switch (event->bNotificationType) {
1860 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1861 /*
1862 * According to the CDC NCM specification ch.7.1
1863 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1864 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1865 */
Bjørn Morkae223cd2013-11-01 11:16:54 +01001866 netif_info(dev, link, dev->net,
1867 "network connection: %sconnected\n",
Bjørn Morkfa83dbe2014-05-16 21:48:28 +02001868 !!event->wValue ? "" : "dis");
1869 usbnet_link_change(dev, !!event->wValue, 0);
Alexey Orishko900d4952010-11-29 23:23:28 +00001870 break;
1871
1872 case USB_CDC_NOTIFY_SPEED_CHANGE:
Alexey Orishko84e77a82011-02-07 09:45:10 +00001873 if (urb->actual_length < (sizeof(*event) +
1874 sizeof(struct usb_cdc_speed_change)))
Alexey Orishko900d4952010-11-29 23:23:28 +00001875 set_bit(EVENT_STS_SPLIT, &dev->flags);
1876 else
Bjørn Morkbed6f762013-11-01 11:16:42 +01001877 cdc_ncm_speed_change(dev,
1878 (struct usb_cdc_speed_change *)&event[1]);
Alexey Orishko900d4952010-11-29 23:23:28 +00001879 break;
1880
1881 default:
Bjørn Mork67a36602013-04-08 08:26:23 +00001882 dev_dbg(&dev->udev->dev,
1883 "NCM: unexpected notification 0x%02x!\n",
1884 event->bNotificationType);
Alexey Orishko900d4952010-11-29 23:23:28 +00001885 break;
1886 }
1887}
1888
Alexey Orishko900d4952010-11-29 23:23:28 +00001889static const struct driver_info cdc_ncm_info = {
1890 .description = "CDC NCM",
Bjørn Mork4d06dd52016-03-07 21:15:36 +01001891 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1892 | FLAG_LINK_INTR,
Alexey Orishko900d4952010-11-29 23:23:28 +00001893 .bind = cdc_ncm_bind,
1894 .unbind = cdc_ncm_unbind,
Oliver Neukuma5e40702012-12-18 04:46:12 +00001895 .manage_power = usbnet_manage_power,
Alexey Orishko900d4952010-11-29 23:23:28 +00001896 .status = cdc_ncm_status,
1897 .rx_fixup = cdc_ncm_rx_fixup,
1898 .tx_fixup = cdc_ncm_tx_fixup,
Miguel Rodríguez Péreze10dcb12020-07-15 20:41:00 +02001899 .set_rx_mode = usbnet_cdc_update_filter,
Alexey Orishko900d4952010-11-29 23:23:28 +00001900};
1901
Dan Williamsf94898e2012-07-24 08:43:22 +00001902/* Same as cdc_ncm_info, but with FLAG_WWAN */
1903static const struct driver_info wwan_info = {
1904 .description = "Mobile Broadband Network Device",
1905 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
Bjørn Mork4d06dd52016-03-07 21:15:36 +01001906 | FLAG_LINK_INTR | FLAG_WWAN,
Dan Williamsf94898e2012-07-24 08:43:22 +00001907 .bind = cdc_ncm_bind,
1908 .unbind = cdc_ncm_unbind,
Oliver Neukuma5e40702012-12-18 04:46:12 +00001909 .manage_power = usbnet_manage_power,
Dan Williamsf94898e2012-07-24 08:43:22 +00001910 .status = cdc_ncm_status,
1911 .rx_fixup = cdc_ncm_rx_fixup,
1912 .tx_fixup = cdc_ncm_tx_fixup,
Miguel Rodríguez Péreze10dcb12020-07-15 20:41:00 +02001913 .set_rx_mode = usbnet_cdc_update_filter,
Dan Williamsf94898e2012-07-24 08:43:22 +00001914};
1915
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001916/* Same as wwan_info, but with FLAG_NOARP */
1917static const struct driver_info wwan_noarp_info = {
1918 .description = "Mobile Broadband Network Device (NO ARP)",
1919 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
Bjørn Mork4d06dd52016-03-07 21:15:36 +01001920 | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP,
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001921 .bind = cdc_ncm_bind,
1922 .unbind = cdc_ncm_unbind,
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001923 .manage_power = usbnet_manage_power,
1924 .status = cdc_ncm_status,
1925 .rx_fixup = cdc_ncm_rx_fixup,
1926 .tx_fixup = cdc_ncm_tx_fixup,
Miguel Rodríguez Péreze10dcb12020-07-15 20:41:00 +02001927 .set_rx_mode = usbnet_cdc_update_filter,
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001928};
1929
Dan Williamsf94898e2012-07-24 08:43:22 +00001930static const struct usb_device_id cdc_devs[] = {
1931 /* Ericsson MBM devices like F5521gw */
1932 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1933 | USB_DEVICE_ID_MATCH_VENDOR,
1934 .idVendor = 0x0bdb,
1935 .bInterfaceClass = USB_CLASS_COMM,
1936 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1937 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1938 .driver_info = (unsigned long) &wwan_info,
1939 },
1940
Daniele Palmas79f42232016-03-31 15:16:47 +02001941 /* Telit LE910 V2 */
1942 { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036,
1943 USB_CLASS_COMM,
1944 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1945 .driver_info = (unsigned long)&wwan_noarp_info,
1946 },
1947
Daniele Palmas670c0d62015-12-18 14:43:33 +01001948 /* DW5812 LTE Verizon Mobile Broadband Card
1949 * Unlike DW5550 this device requires FLAG_NOARP
1950 */
1951 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb,
1952 USB_CLASS_COMM,
1953 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1954 .driver_info = (unsigned long)&wwan_noarp_info,
1955 },
1956
Daniele Palmasfb83d5f2015-12-18 14:43:34 +01001957 /* DW5813 LTE AT&T Mobile Broadband Card
1958 * Unlike DW5550 this device requires FLAG_NOARP
1959 */
1960 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc,
1961 USB_CLASS_COMM,
1962 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1963 .driver_info = (unsigned long)&wwan_noarp_info,
1964 },
1965
Peter Meiserf3a1ef9c2012-08-02 02:30:20 +00001966 /* Dell branded MBM devices like DW5550 */
1967 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1968 | USB_DEVICE_ID_MATCH_VENDOR,
1969 .idVendor = 0x413c,
1970 .bInterfaceClass = USB_CLASS_COMM,
1971 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1972 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1973 .driver_info = (unsigned long) &wwan_info,
1974 },
1975
1976 /* Toshiba branded MBM devices */
1977 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1978 | USB_DEVICE_ID_MATCH_VENDOR,
1979 .idVendor = 0x0930,
1980 .bInterfaceClass = USB_CLASS_COMM,
1981 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1982 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1983 .driver_info = (unsigned long) &wwan_info,
1984 },
1985
Bjørn Mork1f84eab2013-02-27 03:08:58 +00001986 /* tag Huawei devices as wwan */
1987 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1988 USB_CLASS_COMM,
1989 USB_CDC_SUBCLASS_NCM,
1990 USB_CDC_PROTO_NONE),
1991 .driver_info = (unsigned long)&wwan_info,
1992 },
1993
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001994 /* Infineon(now Intel) HSPA Modem platform */
1995 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1996 USB_CLASS_COMM,
1997 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1998 .driver_info = (unsigned long)&wwan_noarp_info,
1999 },
2000
Aleksander Morgado3b638f02017-08-25 15:39:16 +02002001 /* u-blox TOBY-L4 */
2002 { USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010,
2003 USB_CLASS_COMM,
2004 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
2005 .driver_info = (unsigned long)&wwan_info,
2006 },
2007
Dan Williamsf94898e2012-07-24 08:43:22 +00002008 /* Generic CDC-NCM devices */
2009 { USB_INTERFACE_INFO(USB_CLASS_COMM,
2010 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
2011 .driver_info = (unsigned long)&cdc_ncm_info,
2012 },
2013 {
2014 },
2015};
2016MODULE_DEVICE_TABLE(usb, cdc_devs);
2017
Alexey Orishko900d4952010-11-29 23:23:28 +00002018static struct usb_driver cdc_ncm_driver = {
2019 .name = "cdc_ncm",
2020 .id_table = cdc_devs,
Bjørn Mork085e50e2013-11-01 11:16:50 +01002021 .probe = usbnet_probe,
2022 .disconnect = usbnet_disconnect,
Alexey Orishko900d4952010-11-29 23:23:28 +00002023 .suspend = usbnet_suspend,
2024 .resume = usbnet_resume,
Stefan Metzmacher85e3c652011-06-01 02:01:41 +00002025 .reset_resume = usbnet_resume,
Alexey Orishko900d4952010-11-29 23:23:28 +00002026 .supports_autosuspend = 1,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -07002027 .disable_hub_initiated_lpm = 1,
Alexey Orishko900d4952010-11-29 23:23:28 +00002028};
2029
Greg Kroah-Hartmand632eb12011-11-18 09:44:20 -08002030module_usb_driver(cdc_ncm_driver);
Alexey Orishko900d4952010-11-29 23:23:28 +00002031
2032MODULE_AUTHOR("Hans Petter Selasky");
2033MODULE_DESCRIPTION("USB CDC NCM host driver");
2034MODULE_LICENSE("Dual BSD/GPL");