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900d495a AO |
1 | /* |
2 | * cdc_ncm.c | |
3 | * | |
c84ff1d6 | 4 | * Copyright (C) ST-Ericsson 2010-2012 |
900d495a AO |
5 | * 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) | |
22401ff1 | 9 | * http://www.usb.org/developers/docs/devclass_docs/NCM10_012011.zip |
900d495a AO |
10 | * |
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> | |
900d495a AO |
42 | #include <linux/netdevice.h> |
43 | #include <linux/ctype.h> | |
1dfddff5 | 44 | #include <linux/etherdevice.h> |
900d495a | 45 | #include <linux/ethtool.h> |
c2cce3a6 | 46 | #include <linux/kstrtox.h> |
900d495a AO |
47 | #include <linux/workqueue.h> |
48 | #include <linux/mii.h> | |
49 | #include <linux/crc32.h> | |
50 | #include <linux/usb.h> | |
c84ff1d6 | 51 | #include <linux/hrtimer.h> |
900d495a AO |
52 | #include <linux/atomic.h> |
53 | #include <linux/usb/usbnet.h> | |
54 | #include <linux/usb/cdc.h> | |
c91ce3b6 | 55 | #include <linux/usb/cdc_ncm.h> |
900d495a | 56 | |
1e8bbe6c BM |
57 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
58 | static bool prefer_mbim = true; | |
59 | #else | |
60 | static bool prefer_mbim; | |
61 | #endif | |
d61e4038 | 62 | module_param(prefer_mbim, bool, 0644); |
1e8bbe6c BM |
63 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); |
64 | ||
4f4e5436 | 65 | static void cdc_ncm_txpath_bh(struct tasklet_struct *t); |
c84ff1d6 AO |
66 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); |
67 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 68 | static struct usb_driver cdc_ncm_driver; |
900d495a | 69 | |
beeecd42 BM |
70 | struct cdc_ncm_stats { |
71 | char stat_string[ETH_GSTRING_LEN]; | |
72 | int sizeof_stat; | |
73 | int stat_offset; | |
74 | }; | |
75 | ||
76 | #define CDC_NCM_STAT(str, m) { \ | |
77 | .stat_string = str, \ | |
78 | .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ | |
79 | .stat_offset = offsetof(struct cdc_ncm_ctx, m) } | |
80 | #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) | |
81 | ||
82 | static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { | |
83 | CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), | |
84 | CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), | |
85 | CDC_NCM_SIMPLE_STAT(tx_reason_timeout), | |
86 | CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), | |
87 | CDC_NCM_SIMPLE_STAT(tx_overhead), | |
88 | CDC_NCM_SIMPLE_STAT(tx_ntbs), | |
89 | CDC_NCM_SIMPLE_STAT(rx_overhead), | |
90 | CDC_NCM_SIMPLE_STAT(rx_ntbs), | |
91 | }; | |
92 | ||
e1069bbf JB |
93 | #define CDC_NCM_LOW_MEM_MAX_CNT 10 |
94 | ||
beeecd42 BM |
95 | static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) |
96 | { | |
97 | switch (sset) { | |
98 | case ETH_SS_STATS: | |
99 | return ARRAY_SIZE(cdc_ncm_gstrings_stats); | |
100 | default: | |
101 | return -EOPNOTSUPP; | |
102 | } | |
103 | } | |
104 | ||
105 | static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, | |
106 | struct ethtool_stats __always_unused *stats, | |
107 | u64 *data) | |
108 | { | |
109 | struct usbnet *dev = netdev_priv(netdev); | |
110 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
111 | int i; | |
112 | char *p = NULL; | |
113 | ||
114 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
115 | p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; | |
116 | data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; | |
117 | } | |
118 | } | |
119 | ||
120 | static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) | |
121 | { | |
122 | u8 *p = data; | |
123 | int i; | |
124 | ||
125 | switch (stringset) { | |
126 | case ETH_SS_STATS: | |
127 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
128 | memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); | |
129 | p += ETH_GSTRING_LEN; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
6c4e548f BM |
134 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); |
135 | ||
6c4e548f | 136 | static const struct ethtool_ops cdc_ncm_ethtool_ops = { |
eb47c274 ON |
137 | .get_link = usbnet_get_link, |
138 | .nway_reset = usbnet_nway_reset, | |
139 | .get_drvinfo = usbnet_get_drvinfo, | |
140 | .get_msglevel = usbnet_get_msglevel, | |
141 | .set_msglevel = usbnet_set_msglevel, | |
142 | .get_ts_info = ethtool_op_get_ts_info, | |
143 | .get_sset_count = cdc_ncm_get_sset_count, | |
144 | .get_strings = cdc_ncm_get_strings, | |
145 | .get_ethtool_stats = cdc_ncm_get_ethtool_stats, | |
146 | .get_link_ksettings = usbnet_get_link_ksettings_internal, | |
147 | .set_link_ksettings = NULL, | |
6c4e548f BM |
148 | }; |
149 | ||
289507d3 | 150 | static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) |
5aa73d5d BM |
151 | { |
152 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
5aa73d5d BM |
153 | u32 val, max, min; |
154 | ||
155 | /* clamp new_rx to sane values */ | |
156 | min = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
157 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
158 | ||
159 | /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ | |
160 | if (max < min) { | |
161 | dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", | |
162 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); | |
163 | max = min; | |
164 | } | |
165 | ||
166 | val = clamp_t(u32, new_rx, min, max); | |
289507d3 BM |
167 | if (val != new_rx) |
168 | dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); | |
169 | ||
170 | return val; | |
171 | } | |
172 | ||
173 | static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) | |
174 | { | |
175 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
176 | u32 val, max, min; | |
177 | ||
178 | /* clamp new_tx to sane values */ | |
0fa81b30 AB |
179 | if (ctx->is_ndp16) |
180 | min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); | |
181 | else | |
182 | min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth32); | |
183 | ||
289507d3 | 184 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); |
2be6d4d1 LJ |
185 | if (max == 0) |
186 | max = CDC_NCM_NTB_MAX_SIZE_TX; /* dwNtbOutMaxSize not set */ | |
289507d3 BM |
187 | |
188 | /* some devices set dwNtbOutMaxSize too low for the above default */ | |
189 | min = min(min, max); | |
190 | ||
191 | val = clamp_t(u32, new_tx, min, max); | |
192 | if (val != new_tx) | |
193 | dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); | |
194 | ||
195 | return val; | |
196 | } | |
197 | ||
86fe2f8a Y |
198 | static ssize_t min_tx_pkt_show(struct device *d, |
199 | struct device_attribute *attr, char *buf) | |
39eb7e0e BM |
200 | { |
201 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
202 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
203 | ||
204 | return sprintf(buf, "%u\n", ctx->min_tx_pkt); | |
205 | } | |
206 | ||
86fe2f8a Y |
207 | static ssize_t rx_max_show(struct device *d, |
208 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
209 | { |
210 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
211 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
212 | ||
213 | return sprintf(buf, "%u\n", ctx->rx_max); | |
214 | } | |
215 | ||
86fe2f8a Y |
216 | static ssize_t tx_max_show(struct device *d, |
217 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
218 | { |
219 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
220 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
221 | ||
222 | return sprintf(buf, "%u\n", ctx->tx_max); | |
223 | } | |
224 | ||
86fe2f8a Y |
225 | static ssize_t tx_timer_usecs_show(struct device *d, |
226 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
227 | { |
228 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
229 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
230 | ||
231 | return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); | |
232 | } | |
233 | ||
86fe2f8a Y |
234 | static ssize_t min_tx_pkt_store(struct device *d, |
235 | struct device_attribute *attr, | |
236 | const char *buf, size_t len) | |
39eb7e0e BM |
237 | { |
238 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
239 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
240 | unsigned long val; | |
241 | ||
242 | /* no need to restrict values - anything from 0 to infinity is OK */ | |
243 | if (kstrtoul(buf, 0, &val)) | |
244 | return -EINVAL; | |
245 | ||
246 | ctx->min_tx_pkt = val; | |
247 | return len; | |
248 | } | |
249 | ||
86fe2f8a Y |
250 | static ssize_t rx_max_store(struct device *d, |
251 | struct device_attribute *attr, | |
252 | const char *buf, size_t len) | |
289507d3 BM |
253 | { |
254 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
255 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
256 | unsigned long val; | |
257 | ||
258 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) | |
259 | return -EINVAL; | |
260 | ||
261 | cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); | |
262 | return len; | |
263 | } | |
264 | ||
86fe2f8a Y |
265 | static ssize_t tx_max_store(struct device *d, |
266 | struct device_attribute *attr, | |
267 | const char *buf, size_t len) | |
289507d3 BM |
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 | unsigned long val; | |
272 | ||
273 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) | |
274 | return -EINVAL; | |
275 | ||
276 | cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); | |
277 | return len; | |
278 | } | |
279 | ||
86fe2f8a Y |
280 | static ssize_t tx_timer_usecs_store(struct device *d, |
281 | struct device_attribute *attr, | |
282 | const char *buf, size_t len) | |
289507d3 BM |
283 | { |
284 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
285 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
286 | ssize_t ret; | |
287 | unsigned long val; | |
288 | ||
289 | ret = kstrtoul(buf, 0, &val); | |
290 | if (ret) | |
291 | return ret; | |
292 | if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) | |
293 | return -EINVAL; | |
294 | ||
295 | spin_lock_bh(&ctx->mtx); | |
296 | ctx->timer_interval = val * NSEC_PER_USEC; | |
297 | if (!ctx->timer_interval) | |
298 | ctx->tx_timer_pending = 0; | |
299 | spin_unlock_bh(&ctx->mtx); | |
300 | return len; | |
301 | } | |
302 | ||
86fe2f8a Y |
303 | static DEVICE_ATTR_RW(min_tx_pkt); |
304 | static DEVICE_ATTR_RW(rx_max); | |
305 | static DEVICE_ATTR_RW(tx_max); | |
306 | static DEVICE_ATTR_RW(tx_timer_usecs); | |
289507d3 | 307 | |
404814af BM |
308 | static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) |
309 | { | |
310 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
311 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
312 | ||
313 | return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); | |
314 | } | |
315 | ||
316 | static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
317 | { | |
318 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
319 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
320 | bool enable; | |
321 | ||
c2cce3a6 | 322 | if (kstrtobool(buf, &enable)) |
404814af BM |
323 | return -EINVAL; |
324 | ||
325 | /* no change? */ | |
326 | if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
327 | return len; | |
328 | ||
0fa81b30 AB |
329 | if (enable) { |
330 | if (ctx->is_ndp16 && !ctx->delayed_ndp16) { | |
331 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
332 | if (!ctx->delayed_ndp16) | |
333 | return -ENOMEM; | |
334 | } | |
335 | if (!ctx->is_ndp16 && !ctx->delayed_ndp32) { | |
336 | ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
337 | if (!ctx->delayed_ndp32) | |
338 | return -ENOMEM; | |
339 | } | |
404814af BM |
340 | } |
341 | ||
342 | /* flush pending data before changing flag */ | |
343 | netif_tx_lock_bh(dev->net); | |
344 | usbnet_start_xmit(NULL, dev->net); | |
345 | spin_lock_bh(&ctx->mtx); | |
346 | if (enable) | |
347 | ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; | |
348 | else | |
349 | ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; | |
350 | spin_unlock_bh(&ctx->mtx); | |
351 | netif_tx_unlock_bh(dev->net); | |
352 | ||
353 | return len; | |
354 | } | |
355 | static DEVICE_ATTR_RW(ndp_to_end); | |
356 | ||
871578c9 BM |
357 | #define NCM_PARM_ATTR(name, format, tocpu) \ |
358 | static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ | |
359 | { \ | |
360 | struct usbnet *dev = netdev_priv(to_net_dev(d)); \ | |
361 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ | |
362 | return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ | |
363 | } \ | |
d61e4038 | 364 | static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL) |
871578c9 BM |
365 | |
366 | NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); | |
367 | NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); | |
368 | NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); | |
369 | NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); | |
370 | NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); | |
371 | NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); | |
372 | NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); | |
373 | NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); | |
374 | NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); | |
375 | NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); | |
376 | ||
289507d3 | 377 | static struct attribute *cdc_ncm_sysfs_attrs[] = { |
39eb7e0e | 378 | &dev_attr_min_tx_pkt.attr, |
404814af | 379 | &dev_attr_ndp_to_end.attr, |
289507d3 BM |
380 | &dev_attr_rx_max.attr, |
381 | &dev_attr_tx_max.attr, | |
382 | &dev_attr_tx_timer_usecs.attr, | |
871578c9 BM |
383 | &dev_attr_bmNtbFormatsSupported.attr, |
384 | &dev_attr_dwNtbInMaxSize.attr, | |
385 | &dev_attr_wNdpInDivisor.attr, | |
386 | &dev_attr_wNdpInPayloadRemainder.attr, | |
387 | &dev_attr_wNdpInAlignment.attr, | |
388 | &dev_attr_dwNtbOutMaxSize.attr, | |
389 | &dev_attr_wNdpOutDivisor.attr, | |
390 | &dev_attr_wNdpOutPayloadRemainder.attr, | |
391 | &dev_attr_wNdpOutAlignment.attr, | |
392 | &dev_attr_wNtbOutMaxDatagrams.attr, | |
289507d3 BM |
393 | NULL, |
394 | }; | |
395 | ||
43f51ef1 | 396 | static const struct attribute_group cdc_ncm_sysfs_attr_group = { |
289507d3 BM |
397 | .name = "cdc_ncm", |
398 | .attrs = cdc_ncm_sysfs_attrs, | |
399 | }; | |
400 | ||
401 | /* handle rx_max and tx_max changes */ | |
402 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) | |
403 | { | |
404 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
405 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
406 | u32 val; | |
407 | ||
408 | val = cdc_ncm_check_rx_max(dev, new_rx); | |
5aa73d5d BM |
409 | |
410 | /* inform device about NTB input size changes */ | |
411 | if (val != ctx->rx_max) { | |
412 | __le32 dwNtbInMaxSize = cpu_to_le32(val); | |
413 | ||
414 | dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); | |
68864abf | 415 | |
68864abf | 416 | /* tell device to use new size */ |
5aa73d5d BM |
417 | if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
418 | USB_TYPE_CLASS | USB_DIR_OUT | |
419 | | USB_RECIP_INTERFACE, | |
420 | 0, iface_no, &dwNtbInMaxSize, 4) < 0) | |
421 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); | |
422 | else | |
423 | ctx->rx_max = val; | |
424 | } | |
425 | ||
f42763db BM |
426 | /* usbnet use these values for sizing rx queues */ |
427 | if (dev->rx_urb_size != ctx->rx_max) { | |
428 | dev->rx_urb_size = ctx->rx_max; | |
429 | if (netif_running(dev->net)) | |
430 | usbnet_unlink_rx_urbs(dev); | |
431 | } | |
432 | ||
289507d3 | 433 | val = cdc_ncm_check_tx_max(dev, new_tx); |
5aa73d5d BM |
434 | if (val != ctx->tx_max) |
435 | dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); | |
08c74fc9 BM |
436 | |
437 | /* Adding a pad byte here if necessary simplifies the handling | |
438 | * in cdc_ncm_fill_tx_frame, making tx_max always represent | |
439 | * the real skb max size. | |
440 | * | |
441 | * We cannot use dev->maxpacket here because this is called from | |
442 | * .bind which is called before usbnet sets up dev->maxpacket | |
443 | */ | |
68864abf | 444 | if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && |
e13adbfa | 445 | val % usb_maxpacket(dev->udev, dev->out) == 0) |
68864abf BM |
446 | val++; |
447 | ||
448 | /* we might need to flush any pending tx buffers if running */ | |
449 | if (netif_running(dev->net) && val > ctx->tx_max) { | |
450 | netif_tx_lock_bh(dev->net); | |
451 | usbnet_start_xmit(NULL, dev->net); | |
1ba5d0ff BM |
452 | /* make sure tx_curr_skb is reallocated if it was empty */ |
453 | if (ctx->tx_curr_skb) { | |
454 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
455 | ctx->tx_curr_skb = NULL; | |
456 | } | |
68864abf BM |
457 | ctx->tx_max = val; |
458 | netif_tx_unlock_bh(dev->net); | |
459 | } else { | |
460 | ctx->tx_max = val; | |
461 | } | |
08c74fc9 | 462 | |
08c74fc9 | 463 | dev->hard_mtu = ctx->tx_max; |
68864abf BM |
464 | |
465 | /* max qlen depend on hard_mtu and rx_urb_size */ | |
466 | usbnet_update_max_qlen(dev); | |
43e4c6df BM |
467 | |
468 | /* never pad more than 3 full USB packets per transfer */ | |
e13adbfa | 469 | ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out), |
43e4c6df | 470 | CDC_NCM_MIN_TX_PKT, ctx->tx_max); |
5aa73d5d BM |
471 | } |
472 | ||
f8afb73d BM |
473 | /* helpers for NCM and MBIM differences */ |
474 | static u8 cdc_ncm_flags(struct usbnet *dev) | |
900d495a | 475 | { |
bed6f762 | 476 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
900d495a | 477 | |
f8afb73d BM |
478 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) |
479 | return ctx->mbim_desc->bmNetworkCapabilities; | |
480 | if (ctx->func_desc) | |
481 | return ctx->func_desc->bmNetworkCapabilities; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | static int cdc_ncm_eth_hlen(struct usbnet *dev) | |
486 | { | |
487 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
488 | return 0; | |
489 | return ETH_HLEN; | |
490 | } | |
491 | ||
492 | static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) | |
493 | { | |
494 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
495 | return CDC_MBIM_MIN_DATAGRAM_SIZE; | |
496 | return CDC_NCM_MIN_DATAGRAM_SIZE; | |
497 | } | |
498 | ||
499 | static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) | |
500 | { | |
501 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
502 | ||
503 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) | |
504 | return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
505 | if (ctx->ether_desc) | |
506 | return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
507 | return CDC_NCM_MAX_DATAGRAM_SIZE; | |
508 | } | |
509 | ||
510 | /* initial one-time device setup. MUST be called with the data interface | |
511 | * in altsetting 0 | |
512 | */ | |
513 | static int cdc_ncm_init(struct usbnet *dev) | |
514 | { | |
515 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
516 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
517 | int err; | |
900d495a | 518 | |
90b8b037 ML |
519 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
520 | USB_TYPE_CLASS | USB_DIR_IN | |
521 | |USB_RECIP_INTERFACE, | |
ff0992e9 BM |
522 | 0, iface_no, &ctx->ncm_parm, |
523 | sizeof(ctx->ncm_parm)); | |
36c35416 | 524 | if (err < 0) { |
59ede316 BM |
525 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
526 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
527 | } |
528 | ||
f8afb73d BM |
529 | /* set CRC Mode */ |
530 | if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { | |
531 | dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); | |
532 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, | |
533 | USB_TYPE_CLASS | USB_DIR_OUT | |
534 | | USB_RECIP_INTERFACE, | |
535 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
536 | iface_no, NULL, 0); | |
537 | if (err < 0) | |
538 | dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); | |
539 | } | |
540 | ||
0fa81b30 AB |
541 | /* use ndp16 by default */ |
542 | ctx->is_ndp16 = 1; | |
543 | ||
f8afb73d BM |
544 | /* set NTB format, if both formats are supported. |
545 | * | |
546 | * "The host shall only send this command while the NCM Data | |
547 | * Interface is in alternate setting 0." | |
548 | */ | |
d22adbfb DC |
549 | if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & |
550 | USB_CDC_NCM_NTB32_SUPPORTED) { | |
0fa81b30 AB |
551 | if (ctx->drvflags & CDC_NCM_FLAG_PREFER_NTB32) { |
552 | ctx->is_ndp16 = 0; | |
553 | dev_dbg(&dev->intf->dev, "Setting NTB format to 32-bit\n"); | |
554 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
555 | USB_TYPE_CLASS | USB_DIR_OUT | |
556 | | USB_RECIP_INTERFACE, | |
557 | USB_CDC_NCM_NTB32_FORMAT, | |
558 | iface_no, NULL, 0); | |
559 | } else { | |
560 | ctx->is_ndp16 = 1; | |
561 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); | |
562 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
563 | USB_TYPE_CLASS | USB_DIR_OUT | |
564 | | USB_RECIP_INTERFACE, | |
565 | USB_CDC_NCM_NTB16_FORMAT, | |
566 | iface_no, NULL, 0); | |
567 | } | |
568 | if (err < 0) { | |
569 | ctx->is_ndp16 = 1; | |
f8afb73d | 570 | dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); |
0fa81b30 | 571 | } |
f8afb73d BM |
572 | } |
573 | ||
574 | /* set initial device values */ | |
ff0992e9 BM |
575 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); |
576 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
577 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
578 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
579 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b | 580 | /* devices prior to NCM Errata shall set this field to zero */ |
ff0992e9 | 581 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); |
47175e5f | 582 | |
ae223cd4 BM |
583 | dev_dbg(&dev->intf->dev, |
584 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
585 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
f8afb73d | 586 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); |
900d495a | 587 | |
84e77a8b AO |
588 | /* max count of tx datagrams */ |
589 | if ((ctx->tx_max_datagrams == 0) || | |
590 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
591 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a | 592 | |
70559b89 | 593 | /* set up maximum NDP size */ |
0fa81b30 AB |
594 | if (ctx->is_ndp16) |
595 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); | |
596 | else | |
597 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp32) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe32); | |
70559b89 | 598 | |
6c4e548f BM |
599 | /* initial coalescing timer interval */ |
600 | ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; | |
601 | ||
f8afb73d BM |
602 | return 0; |
603 | } | |
604 | ||
605 | /* set a new max datagram size */ | |
606 | static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) | |
607 | { | |
608 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
609 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
610 | __le16 max_datagram_size; | |
611 | u16 mbim_mtu; | |
612 | int err; | |
613 | ||
614 | /* set default based on descriptors */ | |
615 | ctx->max_datagram_size = clamp_t(u32, new_size, | |
616 | cdc_ncm_min_dgram_size(dev), | |
617 | CDC_NCM_MAX_DATAGRAM_SIZE); | |
618 | ||
619 | /* inform the device about the selected Max Datagram Size? */ | |
620 | if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
621 | goto out; | |
622 | ||
623 | /* read current mtu value from device */ | |
624 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
625 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
332f989a | 626 | 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); |
a56dcc6b | 627 | if (err != sizeof(max_datagram_size)) { |
f8afb73d BM |
628 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); |
629 | goto out; | |
630 | } | |
631 | ||
632 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) | |
633 | goto out; | |
634 | ||
635 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
636 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
637 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
332f989a | 638 | 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); |
f8afb73d BM |
639 | if (err < 0) |
640 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
641 | ||
642 | out: | |
643 | /* set MTU to max supported by the device if necessary */ | |
644 | dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); | |
645 | ||
f62c4f38 | 646 | /* do not exceed operator preferred MTU */ |
f8afb73d BM |
647 | if (ctx->mbim_extended_desc) { |
648 | mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); | |
649 | if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) | |
650 | dev->net->mtu = mbim_mtu; | |
651 | } | |
652 | } | |
653 | ||
654 | static void cdc_ncm_fix_modulus(struct usbnet *dev) | |
655 | { | |
656 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
657 | u32 val; | |
900d495a AO |
658 | |
659 | /* | |
660 | * verify that the structure alignment is: | |
661 | * - power of two | |
662 | * - not greater than the maximum transmit length | |
663 | * - not less than four bytes | |
664 | */ | |
665 | val = ctx->tx_ndp_modulus; | |
666 | ||
667 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
668 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 669 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
670 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
671 | } | |
672 | ||
673 | /* | |
674 | * verify that the payload alignment is: | |
675 | * - power of two | |
676 | * - not greater than the maximum transmit length | |
677 | * - not less than four bytes | |
678 | */ | |
679 | val = ctx->tx_modulus; | |
680 | ||
681 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
682 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 683 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
684 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
685 | } | |
686 | ||
687 | /* verify the payload remainder */ | |
688 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 689 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
690 | ctx->tx_remainder = 0; |
691 | } | |
692 | ||
693 | /* adjust TX-remainder according to NCM specification. */ | |
f8afb73d | 694 | ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & |
2d1c4310 | 695 | (ctx->tx_modulus - 1)); |
f8afb73d | 696 | } |
900d495a | 697 | |
f8afb73d BM |
698 | static int cdc_ncm_setup(struct usbnet *dev) |
699 | { | |
700 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
50f1cb1c BM |
701 | u32 def_rx, def_tx; |
702 | ||
f62c4f38 | 703 | /* be conservative when selecting initial buffer size to |
50f1cb1c BM |
704 | * increase the number of hosts this will work for |
705 | */ | |
706 | def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, | |
707 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
708 | def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, | |
709 | le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
900d495a | 710 | |
f8afb73d | 711 | /* clamp rx_max and tx_max and inform device */ |
50f1cb1c | 712 | cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); |
259fef03 | 713 | |
f8afb73d BM |
714 | /* sanitize the modulus and remainder values */ |
715 | cdc_ncm_fix_modulus(dev); | |
259fef03 | 716 | |
f8afb73d BM |
717 | /* set max datagram size */ |
718 | cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); | |
900d495a AO |
719 | return 0; |
720 | } | |
721 | ||
722 | static void | |
ff1632aa | 723 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 724 | { |
ff1632aa | 725 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
726 | u8 ep; |
727 | ||
728 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
900d495a | 729 | e = intf->cur_altsetting->endpoint + ep; |
3fe4b335 BM |
730 | |
731 | /* ignore endpoints which cannot transfer data */ | |
732 | if (!usb_endpoint_maxp(&e->desc)) | |
733 | continue; | |
734 | ||
900d495a AO |
735 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
736 | case USB_ENDPOINT_XFER_INT: | |
737 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
738 | if (!dev->status) |
739 | dev->status = e; | |
900d495a AO |
740 | } |
741 | break; | |
742 | ||
743 | case USB_ENDPOINT_XFER_BULK: | |
744 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
745 | if (!in) |
746 | in = e; | |
900d495a | 747 | } else { |
ff1632aa BM |
748 | if (!out) |
749 | out = e; | |
900d495a AO |
750 | } |
751 | break; | |
752 | ||
753 | default: | |
754 | break; | |
755 | } | |
756 | } | |
ff1632aa BM |
757 | if (in && !dev->in) |
758 | dev->in = usb_rcvbulkpipe(dev->udev, | |
759 | in->desc.bEndpointAddress & | |
760 | USB_ENDPOINT_NUMBER_MASK); | |
761 | if (out && !dev->out) | |
762 | dev->out = usb_sndbulkpipe(dev->udev, | |
763 | out->desc.bEndpointAddress & | |
764 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
765 | } |
766 | ||
767 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
768 | { | |
769 | if (ctx == NULL) | |
770 | return; | |
771 | ||
900d495a AO |
772 | if (ctx->tx_rem_skb != NULL) { |
773 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
774 | ctx->tx_rem_skb = NULL; | |
775 | } | |
776 | ||
777 | if (ctx->tx_curr_skb != NULL) { | |
778 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
779 | ctx->tx_curr_skb = NULL; | |
780 | } | |
781 | ||
0fa81b30 AB |
782 | if (ctx->is_ndp16) |
783 | kfree(ctx->delayed_ndp16); | |
784 | else | |
785 | kfree(ctx->delayed_ndp32); | |
4a0e3e98 | 786 | |
900d495a AO |
787 | kfree(ctx); |
788 | } | |
789 | ||
1dfddff5 BM |
790 | /* we need to override the usbnet change_mtu ndo for two reasons: |
791 | * - respect the negotiated maximum datagram size | |
792 | * - avoid unwanted changes to rx and tx buffers | |
793 | */ | |
794 | int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) | |
795 | { | |
796 | struct usbnet *dev = netdev_priv(net); | |
05a56487 | 797 | |
1dfddff5 | 798 | net->mtu = new_mtu; |
05a56487 RR |
799 | cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); |
800 | ||
1dfddff5 BM |
801 | return 0; |
802 | } | |
803 | EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); | |
804 | ||
805 | static const struct net_device_ops cdc_ncm_netdev_ops = { | |
806 | .ndo_open = usbnet_open, | |
807 | .ndo_stop = usbnet_stop, | |
808 | .ndo_start_xmit = usbnet_start_xmit, | |
809 | .ndo_tx_timeout = usbnet_tx_timeout, | |
37a2ebdd | 810 | .ndo_set_rx_mode = usbnet_set_rx_mode, |
323955a0 | 811 | .ndo_get_stats64 = dev_get_tstats64, |
1dfddff5 BM |
812 | .ndo_change_mtu = cdc_ncm_change_mtu, |
813 | .ndo_set_mac_address = eth_mac_addr, | |
814 | .ndo_validate_addr = eth_validate_addr, | |
815 | }; | |
816 | ||
4a0e3e98 | 817 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) |
900d495a AO |
818 | { |
819 | struct cdc_ncm_ctx *ctx; | |
820 | struct usb_driver *driver; | |
821 | u8 *buf; | |
822 | int len; | |
823 | int temp; | |
824 | u8 iface_no; | |
77b0a099 | 825 | struct usb_cdc_parsed_header hdr; |
900d495a | 826 | |
c796984f | 827 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
828 | if (!ctx) |
829 | return -ENOMEM; | |
900d495a | 830 | |
4f4e5436 ERB |
831 | ctx->dev = dev; |
832 | ||
c84ff1d6 AO |
833 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
834 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
4f4e5436 | 835 | tasklet_setup(&ctx->bh, cdc_ncm_txpath_bh); |
c84ff1d6 | 836 | atomic_set(&ctx->stop, 0); |
900d495a | 837 | spin_lock_init(&ctx->mtx); |
900d495a AO |
838 | |
839 | /* store ctx pointer in device data field */ | |
840 | dev->data[0] = (unsigned long)ctx; | |
841 | ||
9fe0234c BM |
842 | /* only the control interface can be successfully probed */ |
843 | ctx->control = intf; | |
844 | ||
900d495a AO |
845 | /* get some pointers */ |
846 | driver = driver_of(intf); | |
847 | buf = intf->cur_altsetting->extra; | |
848 | len = intf->cur_altsetting->extralen; | |
849 | ||
900d495a | 850 | /* parse through descriptors associated with control interface */ |
77b0a099 ON |
851 | cdc_parse_cdc_header(&hdr, intf, buf, len); |
852 | ||
6527f833 BM |
853 | if (hdr.usb_cdc_union_desc) |
854 | ctx->data = usb_ifnum_to_if(dev->udev, | |
855 | hdr.usb_cdc_union_desc->bSlaveInterface0); | |
77b0a099 ON |
856 | ctx->ether_desc = hdr.usb_cdc_ether_desc; |
857 | ctx->func_desc = hdr.usb_cdc_ncm_desc; | |
858 | ctx->mbim_desc = hdr.usb_cdc_mbim_desc; | |
859 | ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; | |
900d495a | 860 | |
9992c2e2 | 861 | /* some buggy devices have an IAD but no CDC Union */ |
6527f833 | 862 | if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
863 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
864 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
865 | } |
866 | ||
900d495a | 867 | /* check if we got everything */ |
f8afb73d | 868 | if (!ctx->data) { |
492bbe7f | 869 | dev_err(&intf->dev, "CDC Union missing and no IAD found\n"); |
900d495a | 870 | goto error; |
296e81f8 | 871 | } |
f8afb73d BM |
872 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { |
873 | if (!ctx->mbim_desc) { | |
492bbe7f | 874 | dev_err(&intf->dev, "MBIM functional descriptor missing\n"); |
f8afb73d BM |
875 | goto error; |
876 | } | |
877 | } else { | |
878 | if (!ctx->ether_desc || !ctx->func_desc) { | |
492bbe7f | 879 | dev_err(&intf->dev, "NCM or ECM functional descriptors missing\n"); |
f8afb73d BM |
880 | goto error; |
881 | } | |
882 | } | |
900d495a | 883 | |
bbc8d922 BM |
884 | /* claim data interface, if different from control */ |
885 | if (ctx->data != ctx->control) { | |
886 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 | 887 | if (temp) { |
492bbe7f | 888 | dev_err(&intf->dev, "failed to claim data intf\n"); |
bbc8d922 | 889 | goto error; |
296e81f8 | 890 | } |
bbc8d922 | 891 | } |
900d495a AO |
892 | |
893 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
894 | ||
7b8076ce DP |
895 | /* Device-specific flags */ |
896 | ctx->drvflags = drvflags; | |
897 | ||
48906f62 BM |
898 | /* Reset data interface. Some devices will not reset properly |
899 | * unless they are configured first. Toggle the altsetting to | |
7b8076ce DP |
900 | * force a reset. |
901 | * Some other devices do not work properly with this procedure | |
902 | * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE | |
48906f62 | 903 | */ |
7b8076ce DP |
904 | if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) |
905 | usb_set_interface(dev->udev, iface_no, data_altsetting); | |
906 | ||
900d495a | 907 | temp = usb_set_interface(dev->udev, iface_no, 0); |
296e81f8 BM |
908 | if (temp) { |
909 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 910 | goto error2; |
296e81f8 | 911 | } |
900d495a | 912 | |
08c74fc9 BM |
913 | /* initialize basic device settings */ |
914 | if (cdc_ncm_init(dev)) | |
ff0992e9 BM |
915 | goto error2; |
916 | ||
c086e709 BM |
917 | /* Some firmwares need a pause here or they will silently fail |
918 | * to set up the interface properly. This value was decided | |
919 | * empirically on a Sierra Wireless MC7455 running 02.08.02.00 | |
920 | * firmware. | |
921 | */ | |
922 | usleep_range(10000, 20000); | |
923 | ||
900d495a | 924 | /* configure data interface */ |
38396e4c | 925 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
926 | if (temp) { |
927 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 928 | goto error2; |
296e81f8 | 929 | } |
900d495a | 930 | |
ff1632aa BM |
931 | cdc_ncm_find_endpoints(dev, ctx->data); |
932 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
933 | if (!dev->in || !dev->out || !dev->status) { |
934 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 935 | goto error2; |
296e81f8 | 936 | } |
900d495a | 937 | |
900d495a | 938 | usb_set_intfdata(ctx->control, dev); |
900d495a | 939 | |
38396e4c GS |
940 | if (ctx->ether_desc) { |
941 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 | 942 | if (temp) { |
492bbe7f | 943 | dev_err(&intf->dev, "failed to get mac address\n"); |
38396e4c | 944 | goto error2; |
296e81f8 BM |
945 | } |
946 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 947 | } |
900d495a | 948 | |
08c74fc9 BM |
949 | /* finish setting up the device specific data */ |
950 | cdc_ncm_setup(dev); | |
ff0992e9 | 951 | |
4a0e3e98 EM |
952 | /* Allocate the delayed NDP if needed. */ |
953 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
0fa81b30 AB |
954 | if (ctx->is_ndp16) { |
955 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
956 | if (!ctx->delayed_ndp16) | |
957 | goto error2; | |
958 | } else { | |
959 | ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
960 | if (!ctx->delayed_ndp32) | |
961 | goto error2; | |
962 | } | |
4a0e3e98 EM |
963 | dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); |
964 | } | |
965 | ||
6c4e548f BM |
966 | /* override ethtool_ops */ |
967 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
968 | ||
289507d3 BM |
969 | /* add our sysfs attrs */ |
970 | dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; | |
971 | ||
1dfddff5 BM |
972 | /* must handle MTU changes */ |
973 | dev->net->netdev_ops = &cdc_ncm_netdev_ops; | |
f77f0aee | 974 | dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); |
1dfddff5 | 975 | |
900d495a AO |
976 | return 0; |
977 | ||
19694ac8 AO |
978 | error2: |
979 | usb_set_intfdata(ctx->control, NULL); | |
980 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
981 | if (ctx->data != ctx->control) |
982 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
983 | error: |
984 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
985 | dev->data[0] = 0; | |
296e81f8 | 986 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
987 | return -ENODEV; |
988 | } | |
c91ce3b6 | 989 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 990 | |
c91ce3b6 | 991 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
992 | { |
993 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 994 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
995 | |
996 | if (ctx == NULL) | |
997 | return; /* no setup */ | |
998 | ||
c84ff1d6 AO |
999 | atomic_set(&ctx->stop, 1); |
1000 | ||
2aee167c | 1001 | hrtimer_cancel(&ctx->tx_timer); |
c84ff1d6 AO |
1002 | |
1003 | tasklet_kill(&ctx->bh); | |
1004 | ||
bbc8d922 BM |
1005 | /* handle devices with combined control and data interface */ |
1006 | if (ctx->control == ctx->data) | |
1007 | ctx->data = NULL; | |
1008 | ||
19694ac8 AO |
1009 | /* disconnect master --> disconnect slave */ |
1010 | if (intf == ctx->control && ctx->data) { | |
1011 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 1012 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 1013 | ctx->data = NULL; |
900d495a | 1014 | |
19694ac8 AO |
1015 | } else if (intf == ctx->data && ctx->control) { |
1016 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 1017 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 1018 | ctx->control = NULL; |
900d495a AO |
1019 | } |
1020 | ||
3e515665 | 1021 | usb_set_intfdata(intf, NULL); |
900d495a AO |
1022 | cdc_ncm_free(ctx); |
1023 | } | |
c91ce3b6 | 1024 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 1025 | |
50a0ffaf BM |
1026 | /* Return the number of the MBIM control interface altsetting iff it |
1027 | * is preferred and available, | |
1e8bbe6c | 1028 | */ |
50a0ffaf | 1029 | u8 cdc_ncm_select_altsetting(struct usb_interface *intf) |
38396e4c | 1030 | { |
1e8bbe6c | 1031 | struct usb_host_interface *alt; |
38396e4c | 1032 | |
bd329e12 BM |
1033 | /* The MBIM spec defines a NCM compatible default altsetting, |
1034 | * which we may have matched: | |
1035 | * | |
1036 | * "Functions that implement both NCM 1.0 and MBIM (an | |
1037 | * “NCM/MBIM function”) according to this recommendation | |
1038 | * shall provide two alternate settings for the | |
1039 | * Communication Interface. Alternate setting 0, and the | |
1040 | * associated class and endpoint descriptors, shall be | |
1041 | * constructed according to the rules given for the | |
1042 | * Communication Interface in section 5 of [USBNCM10]. | |
1043 | * Alternate setting 1, and the associated class and | |
1044 | * endpoint descriptors, shall be constructed according to | |
1045 | * the rules given in section 6 (USB Device Model) of this | |
1046 | * specification." | |
bd329e12 | 1047 | */ |
50a0ffaf BM |
1048 | if (intf->num_altsetting < 2) |
1049 | return intf->cur_altsetting->desc.bAlternateSetting; | |
1050 | ||
1051 | if (prefer_mbim) { | |
1e8bbe6c | 1052 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); |
50a0ffaf BM |
1053 | if (alt && cdc_ncm_comm_intf_is_mbim(alt)) |
1054 | return CDC_NCM_COMM_ALTSETTING_MBIM; | |
f350ca03 | 1055 | } |
50a0ffaf | 1056 | return CDC_NCM_COMM_ALTSETTING_NCM; |
1e8bbe6c BM |
1057 | } |
1058 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
1059 | ||
1060 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
1061 | { | |
1e8bbe6c | 1062 | /* MBIM backwards compatible function? */ |
50a0ffaf | 1063 | if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) |
1e8bbe6c | 1064 | return -ENODEV; |
bd329e12 | 1065 | |
4a0e3e98 EM |
1066 | /* The NCM data altsetting is fixed, so we hard-coded it. |
1067 | * Additionally, generic NCM devices are assumed to accept arbitrarily | |
1068 | * placed NDP. | |
1069 | */ | |
4d06dd53 | 1070 | return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); |
38396e4c GS |
1071 | } |
1072 | ||
c78b7c58 | 1073 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 1074 | { |
c78b7c58 BM |
1075 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
1076 | ||
1077 | if (skb->len + align > max) | |
1078 | align = max - skb->len; | |
1079 | if (align && skb_tailroom(skb) >= align) | |
b080db58 | 1080 | skb_put_zero(skb, align); |
c78b7c58 BM |
1081 | } |
1082 | ||
1083 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
1084 | * allocating a new one within skb | |
1085 | */ | |
0fa81b30 | 1086 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) |
c78b7c58 BM |
1087 | { |
1088 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
1089 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
1090 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
1091 | ||
4a0e3e98 EM |
1092 | /* If NDP should be moved to the end of the NCM package, we can't follow the |
1093 | * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and | |
1094 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1095 | */ | |
f8c0cfa5 | 1096 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { |
4a0e3e98 EM |
1097 | if (ctx->delayed_ndp16->dwSignature == sign) |
1098 | return ctx->delayed_ndp16; | |
1099 | ||
f8c0cfa5 BM |
1100 | /* We can only push a single NDP to the end. Return |
1101 | * NULL to send what we've already got and queue this | |
1102 | * skb for later. | |
1103 | */ | |
1104 | else if (ctx->delayed_ndp16->dwSignature) | |
1105 | return NULL; | |
1106 | } | |
1107 | ||
c78b7c58 BM |
1108 | /* follow the chain of NDPs, looking for a match */ |
1109 | while (ndpoffset) { | |
1110 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
1111 | if (ndp16->dwSignature == sign) | |
1112 | return ndp16; | |
1113 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1114 | } | |
1115 | ||
1116 | /* align new NDP */ | |
4a0e3e98 | 1117 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
e1069bbf | 1118 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); |
c78b7c58 BM |
1119 | |
1120 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
e1069bbf | 1121 | if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) |
c78b7c58 BM |
1122 | return NULL; |
1123 | ||
1124 | /* link to it */ | |
1125 | if (ndp16) | |
1126 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
1127 | else | |
1128 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
1129 | ||
1130 | /* push a new empty NDP */ | |
4a0e3e98 | 1131 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
ad941e69 | 1132 | ndp16 = skb_put_zero(skb, ctx->max_ndp_size); |
4a0e3e98 EM |
1133 | else |
1134 | ndp16 = ctx->delayed_ndp16; | |
1135 | ||
c78b7c58 BM |
1136 | ndp16->dwSignature = sign; |
1137 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
1138 | return ndp16; | |
900d495a AO |
1139 | } |
1140 | ||
0fa81b30 AB |
1141 | static struct usb_cdc_ncm_ndp32 *cdc_ncm_ndp32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) |
1142 | { | |
1143 | struct usb_cdc_ncm_ndp32 *ndp32 = NULL; | |
1144 | struct usb_cdc_ncm_nth32 *nth32 = (void *)skb->data; | |
1145 | size_t ndpoffset = le32_to_cpu(nth32->dwNdpIndex); | |
1146 | ||
1147 | /* If NDP should be moved to the end of the NCM package, we can't follow the | |
1148 | * NTH32 header as we would normally do. NDP isn't written to the SKB yet, and | |
1149 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1150 | */ | |
1151 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
1152 | if (ctx->delayed_ndp32->dwSignature == sign) | |
1153 | return ctx->delayed_ndp32; | |
1154 | ||
1155 | /* We can only push a single NDP to the end. Return | |
1156 | * NULL to send what we've already got and queue this | |
1157 | * skb for later. | |
1158 | */ | |
1159 | else if (ctx->delayed_ndp32->dwSignature) | |
1160 | return NULL; | |
1161 | } | |
1162 | ||
1163 | /* follow the chain of NDPs, looking for a match */ | |
1164 | while (ndpoffset) { | |
1165 | ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb->data + ndpoffset); | |
1166 | if (ndp32->dwSignature == sign) | |
1167 | return ndp32; | |
1168 | ndpoffset = le32_to_cpu(ndp32->dwNextNdpIndex); | |
1169 | } | |
1170 | ||
1171 | /* align new NDP */ | |
1172 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
1173 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); | |
1174 | ||
1175 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
1176 | if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) | |
1177 | return NULL; | |
1178 | ||
1179 | /* link to it */ | |
1180 | if (ndp32) | |
1181 | ndp32->dwNextNdpIndex = cpu_to_le32(skb->len); | |
1182 | else | |
1183 | nth32->dwNdpIndex = cpu_to_le32(skb->len); | |
1184 | ||
1185 | /* push a new empty NDP */ | |
1186 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
1187 | ndp32 = skb_put_zero(skb, ctx->max_ndp_size); | |
1188 | else | |
1189 | ndp32 = ctx->delayed_ndp32; | |
1190 | ||
1191 | ndp32->dwSignature = sign; | |
5d0ab06b | 1192 | ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32)); |
0fa81b30 AB |
1193 | return ndp32; |
1194 | } | |
1195 | ||
c91ce3b6 | 1196 | struct sk_buff * |
bed6f762 | 1197 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 1198 | { |
bed6f762 | 1199 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
0fa81b30 AB |
1200 | union { |
1201 | struct usb_cdc_ncm_nth16 *nth16; | |
1202 | struct usb_cdc_ncm_nth32 *nth32; | |
1203 | } nth; | |
1204 | union { | |
1205 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1206 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1207 | } ndp; | |
900d495a | 1208 | struct sk_buff *skb_out; |
c78b7c58 | 1209 | u16 n = 0, index, ndplen; |
84e77a8b | 1210 | u8 ready2send = 0; |
4a0e3e98 | 1211 | u32 delayed_ndp_size; |
aeca3a77 | 1212 | size_t padding_count; |
4a0e3e98 EM |
1213 | |
1214 | /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated | |
1215 | * accordingly. Otherwise, we should check here. | |
1216 | */ | |
1217 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) | |
7a68d725 JS |
1218 | delayed_ndp_size = ctx->max_ndp_size + |
1219 | max_t(u32, | |
1220 | ctx->tx_ndp_modulus, | |
1221 | ctx->tx_modulus + ctx->tx_remainder) - 1; | |
4a0e3e98 EM |
1222 | else |
1223 | delayed_ndp_size = 0; | |
900d495a AO |
1224 | |
1225 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 1226 | if (skb != NULL) { |
900d495a | 1227 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
1228 | swap(sign, ctx->tx_rem_sign); |
1229 | } else { | |
84e77a8b | 1230 | ready2send = 1; |
c78b7c58 | 1231 | } |
900d495a AO |
1232 | |
1233 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 1234 | skb_out = ctx->tx_curr_skb; |
900d495a | 1235 | |
c78b7c58 BM |
1236 | /* allocate a new OUT skb */ |
1237 | if (!skb_out) { | |
e1069bbf JB |
1238 | if (ctx->tx_low_mem_val == 0) { |
1239 | ctx->tx_curr_size = ctx->tx_max; | |
1240 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1241 | /* If the memory allocation fails we will wait longer | |
1242 | * each time before attempting another full size | |
1243 | * allocation again to not overload the system | |
1244 | * further. | |
1245 | */ | |
1246 | if (skb_out == NULL) { | |
1247 | ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1, | |
1248 | (unsigned)CDC_NCM_LOW_MEM_MAX_CNT); | |
1249 | ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt; | |
1250 | } | |
1251 | } | |
900d495a | 1252 | if (skb_out == NULL) { |
e1069bbf JB |
1253 | /* See if a very small allocation is possible. |
1254 | * We will send this packet immediately and hope | |
1255 | * that there is more memory available later. | |
1256 | */ | |
1257 | if (skb) | |
1258 | ctx->tx_curr_size = max(skb->len, | |
1259 | (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE); | |
1260 | else | |
1261 | ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE; | |
1262 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1263 | ||
1264 | /* No allocation possible so we will abort */ | |
1265 | if (skb_out == NULL) { | |
1266 | if (skb != NULL) { | |
1267 | dev_kfree_skb_any(skb); | |
1268 | dev->net->stats.tx_dropped++; | |
1269 | } | |
1270 | goto exit_no_skb; | |
900d495a | 1271 | } |
e1069bbf | 1272 | ctx->tx_low_mem_val--; |
900d495a | 1273 | } |
0fa81b30 AB |
1274 | if (ctx->is_ndp16) { |
1275 | /* fill out the initial 16-bit NTB header */ | |
1276 | nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16)); | |
1277 | nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
1278 | nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
1279 | nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
1280 | } else { | |
1281 | /* fill out the initial 32-bit NTB header */ | |
1282 | nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32)); | |
1283 | nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN); | |
1284 | nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32)); | |
1285 | nth.nth32->wSequence = cpu_to_le16(ctx->tx_seq++); | |
1286 | } | |
900d495a | 1287 | |
c78b7c58 | 1288 | /* count total number of frames in this NTB */ |
900d495a | 1289 | ctx->tx_curr_frame_num = 0; |
beeecd42 BM |
1290 | |
1291 | /* recent payload counter for this skb_out */ | |
1292 | ctx->tx_curr_frame_payload = 0; | |
900d495a AO |
1293 | } |
1294 | ||
c78b7c58 BM |
1295 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
1296 | /* send any remaining skb first */ | |
900d495a AO |
1297 | if (skb == NULL) { |
1298 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 1299 | sign = ctx->tx_rem_sign; |
900d495a AO |
1300 | ctx->tx_rem_skb = NULL; |
1301 | ||
1302 | /* check for end of skb */ | |
1303 | if (skb == NULL) | |
1304 | break; | |
1305 | } | |
1306 | ||
c78b7c58 | 1307 | /* get the appropriate NDP for this skb */ |
0fa81b30 AB |
1308 | if (ctx->is_ndp16) |
1309 | ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
1310 | else | |
1311 | ndp.ndp32 = cdc_ncm_ndp32(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
c78b7c58 BM |
1312 | |
1313 | /* align beginning of next frame */ | |
e1069bbf | 1314 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size); |
c78b7c58 BM |
1315 | |
1316 | /* check if we had enough room left for both NDP and frame */ | |
0fa81b30 AB |
1317 | if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) || |
1318 | skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) { | |
900d495a AO |
1319 | if (n == 0) { |
1320 | /* won't fit, MTU problem? */ | |
1321 | dev_kfree_skb_any(skb); | |
1322 | skb = NULL; | |
bed6f762 | 1323 | dev->net->stats.tx_dropped++; |
900d495a AO |
1324 | } else { |
1325 | /* no room for skb - store for later */ | |
1326 | if (ctx->tx_rem_skb != NULL) { | |
1327 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 1328 | dev->net->stats.tx_dropped++; |
900d495a AO |
1329 | } |
1330 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 1331 | ctx->tx_rem_sign = sign; |
900d495a | 1332 | skb = NULL; |
84e77a8b | 1333 | ready2send = 1; |
beeecd42 | 1334 | ctx->tx_reason_ntb_full++; /* count reason for transmitting */ |
900d495a AO |
1335 | } |
1336 | break; | |
1337 | } | |
1338 | ||
ef9ac209 | 1339 | /* calculate frame number within this NDP */ |
0fa81b30 AB |
1340 | if (ctx->is_ndp16) { |
1341 | ndplen = le16_to_cpu(ndp.ndp16->wLength); | |
1342 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
1343 | ||
1344 | /* OK, add this skb */ | |
1345 | ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
1346 | ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
1347 | ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
1348 | } else { | |
1349 | ndplen = le16_to_cpu(ndp.ndp32->wLength); | |
1350 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1; | |
900d495a | 1351 | |
0fa81b30 AB |
1352 | ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len); |
1353 | ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len); | |
1354 | ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32)); | |
1355 | } | |
59ae1d12 | 1356 | skb_put_data(skb_out, skb->data, skb->len); |
beeecd42 | 1357 | ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ |
900d495a AO |
1358 | dev_kfree_skb_any(skb); |
1359 | skb = NULL; | |
c78b7c58 BM |
1360 | |
1361 | /* send now if this NDP is full */ | |
1362 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
1363 | ready2send = 1; | |
beeecd42 | 1364 | ctx->tx_reason_ndp_full++; /* count reason for transmitting */ |
c78b7c58 BM |
1365 | break; |
1366 | } | |
900d495a AO |
1367 | } |
1368 | ||
1369 | /* free up any dangling skb */ | |
1370 | if (skb != NULL) { | |
1371 | dev_kfree_skb_any(skb); | |
1372 | skb = NULL; | |
bed6f762 | 1373 | dev->net->stats.tx_dropped++; |
900d495a AO |
1374 | } |
1375 | ||
1376 | ctx->tx_curr_frame_num = n; | |
1377 | ||
1378 | if (n == 0) { | |
1379 | /* wait for more frames */ | |
1380 | /* push variables */ | |
1381 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1382 | goto exit_no_skb; |
1383 | ||
6c4e548f | 1384 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { |
900d495a AO |
1385 | /* wait for more frames */ |
1386 | /* push variables */ | |
1387 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1388 | /* set the pending count */ |
1389 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 1390 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
1391 | goto exit_no_skb; |
1392 | ||
1393 | } else { | |
beeecd42 BM |
1394 | if (n == ctx->tx_max_datagrams) |
1395 | ctx->tx_reason_max_datagram++; /* count reason for transmitting */ | |
900d495a AO |
1396 | /* frame goes out */ |
1397 | /* variables will be reset at next call */ | |
1398 | } | |
1399 | ||
4a0e3e98 EM |
1400 | /* If requested, put NDP at end of frame. */ |
1401 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
0fa81b30 AB |
1402 | if (ctx->is_ndp16) { |
1403 | nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1404 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); | |
1405 | nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len); | |
1406 | skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size); | |
1407 | ||
1408 | /* Zero out delayed NDP - signature checking will naturally fail. */ | |
1409 | ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); | |
1410 | } else { | |
1411 | nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; | |
1412 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); | |
1413 | nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len); | |
1414 | skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size); | |
4a0e3e98 | 1415 | |
0fa81b30 AB |
1416 | ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size); |
1417 | } | |
4a0e3e98 EM |
1418 | } |
1419 | ||
43e4c6df | 1420 | /* If collected data size is less or equal ctx->min_tx_pkt |
20572226 BM |
1421 | * bytes, we send buffers as it is. If we get more data, it |
1422 | * would be more efficient for USB HS mobile device with DMA | |
1423 | * engine to receive a full size NTB, than canceling DMA | |
1424 | * transfer and receiving a short packet. | |
4d619f62 BM |
1425 | * |
1426 | * This optimization support is pointless if we end up sending | |
1427 | * a ZLP after full sized NTBs. | |
900d495a | 1428 | */ |
4d619f62 | 1429 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
aeca3a77 | 1430 | skb_out->len > ctx->min_tx_pkt) { |
e1069bbf | 1431 | padding_count = ctx->tx_curr_size - skb_out->len; |
7a68d725 JS |
1432 | if (!WARN_ON(padding_count > ctx->tx_curr_size)) |
1433 | skb_put_zero(skb_out, padding_count); | |
e1069bbf | 1434 | } else if (skb_out->len < ctx->tx_curr_size && |
aeca3a77 | 1435 | (skb_out->len % dev->maxpacket) == 0) { |
634fef61 | 1436 | skb_put_u8(skb_out, 0); /* force short packet */ |
aeca3a77 | 1437 | } |
900d495a | 1438 | |
c78b7c58 | 1439 | /* set final frame length */ |
0fa81b30 AB |
1440 | if (ctx->is_ndp16) { |
1441 | nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1442 | nth.nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
1443 | } else { | |
1444 | nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; | |
1445 | nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len); | |
1446 | } | |
900d495a AO |
1447 | |
1448 | /* return skb */ | |
1449 | ctx->tx_curr_skb = NULL; | |
beeecd42 BM |
1450 | |
1451 | /* keep private stats: framing overhead and number of NTBs */ | |
1452 | ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; | |
1453 | ctx->tx_ntbs++; | |
1454 | ||
7a1e890e | 1455 | /* usbnet will count all the framing overhead by default. |
beeecd42 BM |
1456 | * Adjust the stats so that the tx_bytes counter show real |
1457 | * payload data instead. | |
1458 | */ | |
7a1e890e | 1459 | usbnet_set_skb_tx_stats(skb_out, n, |
44f6731d | 1460 | (long)ctx->tx_curr_frame_payload - skb_out->len); |
1e9e39f4 | 1461 | |
900d495a AO |
1462 | return skb_out; |
1463 | ||
1464 | exit_no_skb: | |
046c6594 BM |
1465 | /* Start timer, if there is a remaining non-empty skb */ |
1466 | if (ctx->tx_curr_skb != NULL && n > 0) | |
c84ff1d6 | 1467 | cdc_ncm_tx_timeout_start(ctx); |
900d495a AO |
1468 | return NULL; |
1469 | } | |
c91ce3b6 | 1470 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
1471 | |
1472 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
1473 | { | |
1474 | /* start timer, if not already started */ | |
c84ff1d6 AO |
1475 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
1476 | hrtimer_start(&ctx->tx_timer, | |
8b0e1953 | 1477 | ctx->timer_interval, |
c84ff1d6 | 1478 | HRTIMER_MODE_REL); |
900d495a AO |
1479 | } |
1480 | ||
c84ff1d6 | 1481 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 1482 | { |
c84ff1d6 AO |
1483 | struct cdc_ncm_ctx *ctx = |
1484 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 1485 | |
c84ff1d6 AO |
1486 | if (!atomic_read(&ctx->stop)) |
1487 | tasklet_schedule(&ctx->bh); | |
1488 | return HRTIMER_NORESTART; | |
1489 | } | |
900d495a | 1490 | |
4f4e5436 | 1491 | static void cdc_ncm_txpath_bh(struct tasklet_struct *t) |
c84ff1d6 | 1492 | { |
4f4e5436 ERB |
1493 | struct cdc_ncm_ctx *ctx = from_tasklet(ctx, t, bh); |
1494 | struct usbnet *dev = ctx->dev; | |
900d495a | 1495 | |
f1ed409f | 1496 | spin_lock(&ctx->mtx); |
c84ff1d6 AO |
1497 | if (ctx->tx_timer_pending != 0) { |
1498 | ctx->tx_timer_pending--; | |
900d495a | 1499 | cdc_ncm_tx_timeout_start(ctx); |
f1ed409f | 1500 | spin_unlock(&ctx->mtx); |
bed6f762 | 1501 | } else if (dev->net != NULL) { |
beeecd42 | 1502 | ctx->tx_reason_timeout++; /* count reason for transmitting */ |
f1ed409f | 1503 | spin_unlock(&ctx->mtx); |
bed6f762 BM |
1504 | netif_tx_lock_bh(dev->net); |
1505 | usbnet_start_xmit(NULL, dev->net); | |
1506 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba | 1507 | } else { |
f1ed409f | 1508 | spin_unlock(&ctx->mtx); |
f742aa8a | 1509 | } |
900d495a AO |
1510 | } |
1511 | ||
2f69702c | 1512 | struct sk_buff * |
900d495a AO |
1513 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
1514 | { | |
1515 | struct sk_buff *skb_out; | |
1516 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
1517 | |
1518 | /* | |
1519 | * The Ethernet API we are using does not support transmitting | |
1520 | * multiple Ethernet frames in a single call. This driver will | |
1521 | * accumulate multiple Ethernet frames and send out a larger | |
1522 | * USB frame when the USB buffer is full or when a single jiffies | |
1523 | * timeout happens. | |
1524 | */ | |
1525 | if (ctx == NULL) | |
1526 | goto error; | |
1527 | ||
c84ff1d6 | 1528 | spin_lock_bh(&ctx->mtx); |
0fa81b30 AB |
1529 | |
1530 | if (ctx->is_ndp16) | |
1531 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); | |
1532 | else | |
1533 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)); | |
1534 | ||
c84ff1d6 | 1535 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
1536 | return skb_out; |
1537 | ||
1538 | error: | |
1539 | if (skb != NULL) | |
1540 | dev_kfree_skb_any(skb); | |
1541 | ||
1542 | return NULL; | |
1543 | } | |
2f69702c | 1544 | EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); |
900d495a | 1545 | |
ff06ab13 | 1546 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 1547 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 1548 | { |
ae223cd4 | 1549 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 1550 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
1551 | int len; |
1552 | int ret = -EINVAL; | |
900d495a | 1553 | |
900d495a AO |
1554 | if (ctx == NULL) |
1555 | goto error; | |
1556 | ||
d5ddb4a5 AO |
1557 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
1558 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 1559 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
1560 | goto error; |
1561 | } | |
1562 | ||
d5ddb4a5 | 1563 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 1564 | |
986e10d6 | 1565 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
1566 | netif_dbg(dev, rx_err, dev->net, |
1567 | "invalid NTH16 signature <%#010x>\n", | |
1568 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
1569 | goto error; |
1570 | } | |
1571 | ||
d5ddb4a5 AO |
1572 | len = le16_to_cpu(nth16->wBlockLength); |
1573 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
1574 | netif_dbg(dev, rx_err, dev->net, |
1575 | "unsupported NTB block length %u/%u\n", len, | |
1576 | ctx->rx_max); | |
900d495a AO |
1577 | goto error; |
1578 | } | |
1579 | ||
d5ddb4a5 | 1580 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
1581 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
1582 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
1583 | netif_dbg(dev, rx_err, dev->net, | |
1584 | "sequence number glitch prev=%d curr=%d\n", | |
1585 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
1586 | } |
1587 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
1588 | ||
ff06ab13 BM |
1589 | ret = le16_to_cpu(nth16->wNdpIndex); |
1590 | error: | |
1591 | return ret; | |
1592 | } | |
c91ce3b6 | 1593 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 | 1594 | |
0fa81b30 AB |
1595 | int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
1596 | { | |
1597 | struct usbnet *dev = netdev_priv(skb_in->dev); | |
1598 | struct usb_cdc_ncm_nth32 *nth32; | |
1599 | int len; | |
1600 | int ret = -EINVAL; | |
1601 | ||
1602 | if (ctx == NULL) | |
1603 | goto error; | |
1604 | ||
1605 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) + | |
1606 | sizeof(struct usb_cdc_ncm_ndp32))) { | |
1607 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); | |
1608 | goto error; | |
1609 | } | |
1610 | ||
1611 | nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data; | |
1612 | ||
1613 | if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) { | |
1614 | netif_dbg(dev, rx_err, dev->net, | |
1615 | "invalid NTH32 signature <%#010x>\n", | |
1616 | le32_to_cpu(nth32->dwSignature)); | |
1617 | goto error; | |
1618 | } | |
1619 | ||
1620 | len = le32_to_cpu(nth32->dwBlockLength); | |
1621 | if (len > ctx->rx_max) { | |
1622 | netif_dbg(dev, rx_err, dev->net, | |
1623 | "unsupported NTB block length %u/%u\n", len, | |
1624 | ctx->rx_max); | |
1625 | goto error; | |
1626 | } | |
1627 | ||
1628 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth32->wSequence) && | |
1629 | (ctx->rx_seq || le16_to_cpu(nth32->wSequence)) && | |
1630 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) { | |
1631 | netif_dbg(dev, rx_err, dev->net, | |
1632 | "sequence number glitch prev=%d curr=%d\n", | |
1633 | ctx->rx_seq, le16_to_cpu(nth32->wSequence)); | |
1634 | } | |
1635 | ctx->rx_seq = le16_to_cpu(nth32->wSequence); | |
1636 | ||
1637 | ret = le32_to_cpu(nth32->dwNdpIndex); | |
1638 | error: | |
1639 | return ret; | |
1640 | } | |
1641 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32); | |
1642 | ||
ff06ab13 | 1643 | /* verify NDP header and return number of datagrams, or negative error */ |
c91ce3b6 | 1644 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 1645 | { |
ae223cd4 | 1646 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
1647 | struct usb_cdc_ncm_ndp16 *ndp16; |
1648 | int ret = -EINVAL; | |
1649 | ||
75d67d35 | 1650 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
1651 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
1652 | ndpoffset); | |
900d495a AO |
1653 | goto error; |
1654 | } | |
75d67d35 | 1655 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 1656 | |
d5ddb4a5 | 1657 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
1658 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
1659 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 1660 | goto error; |
900d495a AO |
1661 | } |
1662 | ||
ff06ab13 | 1663 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
1664 | sizeof(struct usb_cdc_ncm_ndp16)) / |
1665 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 1666 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 1667 | |
ae223cd4 BM |
1668 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
1669 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
1670 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 1671 | ret = -EINVAL; |
900d495a AO |
1672 | } |
1673 | ||
ff06ab13 BM |
1674 | error: |
1675 | return ret; | |
1676 | } | |
c91ce3b6 | 1677 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 | 1678 | |
0fa81b30 AB |
1679 | /* verify NDP header and return number of datagrams, or negative error */ |
1680 | int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset) | |
1681 | { | |
1682 | struct usbnet *dev = netdev_priv(skb_in->dev); | |
1683 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1684 | int ret = -EINVAL; | |
1685 | ||
1686 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) { | |
1687 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", | |
1688 | ndpoffset); | |
1689 | goto error; | |
1690 | } | |
1691 | ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); | |
1692 | ||
1693 | if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) { | |
1694 | netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n", | |
1695 | le16_to_cpu(ndp32->wLength)); | |
1696 | goto error; | |
1697 | } | |
1698 | ||
1699 | ret = ((le16_to_cpu(ndp32->wLength) - | |
1700 | sizeof(struct usb_cdc_ncm_ndp32)) / | |
1701 | sizeof(struct usb_cdc_ncm_dpe32)); | |
1702 | ret--; /* we process NDP entries except for the last one */ | |
1703 | ||
1704 | if ((sizeof(struct usb_cdc_ncm_ndp32) + | |
1705 | ret * (sizeof(struct usb_cdc_ncm_dpe32))) > skb_in->len) { | |
1706 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
1707 | ret = -EINVAL; | |
1708 | } | |
1709 | ||
1710 | error: | |
1711 | return ret; | |
1712 | } | |
1713 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp32); | |
1714 | ||
2f69702c | 1715 | int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) |
ff06ab13 BM |
1716 | { |
1717 | struct sk_buff *skb; | |
1718 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
8d2b1a1e | 1719 | unsigned int len; |
ff06ab13 BM |
1720 | int nframes; |
1721 | int x; | |
8d2b1a1e | 1722 | unsigned int offset; |
0fa81b30 AB |
1723 | union { |
1724 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1725 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1726 | } ndp; | |
1727 | union { | |
1728 | struct usb_cdc_ncm_dpe16 *dpe16; | |
1729 | struct usb_cdc_ncm_dpe32 *dpe32; | |
1730 | } dpe; | |
1731 | ||
ff06ab13 BM |
1732 | int ndpoffset; |
1733 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
beeecd42 | 1734 | u32 payload = 0; |
ff06ab13 | 1735 | |
0fa81b30 AB |
1736 | if (ctx->is_ndp16) |
1737 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
1738 | else | |
1739 | ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in); | |
1740 | ||
ff06ab13 BM |
1741 | if (ndpoffset < 0) |
1742 | goto error; | |
1743 | ||
1744 | next_ndp: | |
0fa81b30 AB |
1745 | if (ctx->is_ndp16) { |
1746 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
1747 | if (nframes < 0) | |
1748 | goto error; | |
ff06ab13 | 1749 | |
0fa81b30 | 1750 | ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
ff06ab13 | 1751 | |
0fa81b30 AB |
1752 | if (ndp.ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
1753 | netif_dbg(dev, rx_err, dev->net, | |
1754 | "invalid DPT16 signature <%#010x>\n", | |
1755 | le32_to_cpu(ndp.ndp16->dwSignature)); | |
1756 | goto err_ndp; | |
1757 | } | |
1758 | dpe.dpe16 = ndp.ndp16->dpe16; | |
1759 | } else { | |
1760 | nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset); | |
1761 | if (nframes < 0) | |
1762 | goto error; | |
1763 | ||
1764 | ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); | |
1765 | ||
1766 | if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) { | |
1767 | netif_dbg(dev, rx_err, dev->net, | |
1768 | "invalid DPT32 signature <%#010x>\n", | |
1769 | le32_to_cpu(ndp.ndp32->dwSignature)); | |
1770 | goto err_ndp; | |
1771 | } | |
1772 | dpe.dpe32 = ndp.ndp32->dpe32; | |
ff06ab13 | 1773 | } |
900d495a | 1774 | |
0fa81b30 AB |
1775 | for (x = 0; x < nframes; x++) { |
1776 | if (ctx->is_ndp16) { | |
1777 | offset = le16_to_cpu(dpe.dpe16->wDatagramIndex); | |
1778 | len = le16_to_cpu(dpe.dpe16->wDatagramLength); | |
1779 | } else { | |
1780 | offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex); | |
1781 | len = le32_to_cpu(dpe.dpe32->dwDatagramLength); | |
1782 | } | |
900d495a AO |
1783 | |
1784 | /* | |
1785 | * CDC NCM ch. 3.7 | |
1786 | * All entries after first NULL entry are to be ignored | |
1787 | */ | |
d5ddb4a5 | 1788 | if ((offset == 0) || (len == 0)) { |
900d495a | 1789 | if (!x) |
75d67d35 | 1790 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1791 | break; |
1792 | } | |
1793 | ||
8d2b1a1e ON |
1794 | /* sanity checking - watch out for integer wrap*/ |
1795 | if ((offset > skb_in->len) || (len > skb_in->len - offset) || | |
d5ddb4a5 | 1796 | (len > ctx->rx_max) || (len < ETH_HLEN)) { |
ae223cd4 BM |
1797 | netif_dbg(dev, rx_err, dev->net, |
1798 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
1799 | x, offset, len, skb_in); | |
900d495a | 1800 | if (!x) |
75d67d35 | 1801 | goto err_ndp; |
900d495a AO |
1802 | break; |
1803 | ||
1804 | } else { | |
1e2c6117 BM |
1805 | /* create a fresh copy to reduce truesize */ |
1806 | skb = netdev_alloc_skb_ip_align(dev->net, len); | |
9e56790a JJ |
1807 | if (!skb) |
1808 | goto error; | |
59ae1d12 | 1809 | skb_put_data(skb, skb_in->data + offset, len); |
900d495a | 1810 | usbnet_skb_return(dev, skb); |
beeecd42 | 1811 | payload += len; /* count payload bytes in this NTB */ |
900d495a | 1812 | } |
0fa81b30 AB |
1813 | |
1814 | if (ctx->is_ndp16) | |
1815 | dpe.dpe16++; | |
1816 | else | |
1817 | dpe.dpe32++; | |
900d495a | 1818 | } |
75d67d35 BM |
1819 | err_ndp: |
1820 | /* are there more NDPs to process? */ | |
0fa81b30 AB |
1821 | if (ctx->is_ndp16) |
1822 | ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex); | |
1823 | else | |
1824 | ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex); | |
1825 | ||
75d67d35 BM |
1826 | if (ndpoffset && loopcount--) |
1827 | goto next_ndp; | |
1828 | ||
beeecd42 BM |
1829 | /* update stats */ |
1830 | ctx->rx_overhead += skb_in->len - payload; | |
1831 | ctx->rx_ntbs++; | |
1832 | ||
900d495a AO |
1833 | return 1; |
1834 | error: | |
1835 | return 0; | |
1836 | } | |
2f69702c | 1837 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); |
900d495a AO |
1838 | |
1839 | static void | |
bed6f762 | 1840 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1841 | struct usb_cdc_speed_change *data) |
900d495a | 1842 | { |
eb47c274 ON |
1843 | /* RTL8156 shipped before 2021 sends notification about every 32ms. */ |
1844 | dev->rx_speed = le32_to_cpu(data->DLBitRRate); | |
1845 | dev->tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1846 | } |
1847 | ||
1848 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1849 | { | |
900d495a AO |
1850 | struct usb_cdc_notification *event; |
1851 | ||
900d495a AO |
1852 | if (urb->actual_length < sizeof(*event)) |
1853 | return; | |
1854 | ||
1855 | /* test for split data in 8-byte chunks */ | |
1856 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1857 | cdc_ncm_speed_change(dev, |
84e77a8b | 1858 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1859 | return; |
1860 | } | |
1861 | ||
1862 | event = urb->transfer_buffer; | |
1863 | ||
1864 | switch (event->bNotificationType) { | |
1865 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1866 | /* | |
1867 | * According to the CDC NCM specification ch.7.1 | |
1868 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1869 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1870 | */ | |
eb47c274 ON |
1871 | /* RTL8156 shipped before 2021 sends notification about |
1872 | * every 32ms. Don't forward notification if state is same. | |
1873 | */ | |
de658a19 GG |
1874 | if (netif_carrier_ok(dev->net) != !!event->wValue) |
1875 | usbnet_link_change(dev, !!event->wValue, 0); | |
900d495a AO |
1876 | break; |
1877 | ||
1878 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1879 | if (urb->actual_length < (sizeof(*event) + |
1880 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1881 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1882 | else | |
bed6f762 BM |
1883 | cdc_ncm_speed_change(dev, |
1884 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1885 | break; |
1886 | ||
1887 | default: | |
67a36606 BM |
1888 | dev_dbg(&dev->udev->dev, |
1889 | "NCM: unexpected notification 0x%02x!\n", | |
1890 | event->bNotificationType); | |
900d495a AO |
1891 | break; |
1892 | } | |
1893 | } | |
1894 | ||
900d495a | 1895 | static const struct driver_info cdc_ncm_info = { |
266c0190 | 1896 | .description = "CDC NCM (NO ZLP)", |
4d06dd53 | 1897 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET |
c1a3d406 | 1898 | | FLAG_LINK_INTR | FLAG_ETHER, |
900d495a AO |
1899 | .bind = cdc_ncm_bind, |
1900 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1901 | .manage_power = usbnet_manage_power, |
900d495a AO |
1902 | .status = cdc_ncm_status, |
1903 | .rx_fixup = cdc_ncm_rx_fixup, | |
1904 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1905 | .set_rx_mode = usbnet_cdc_update_filter, |
900d495a AO |
1906 | }; |
1907 | ||
266c0190 DC |
1908 | /* Same as cdc_ncm_info, but with FLAG_SEND_ZLP */ |
1909 | static const struct driver_info cdc_ncm_zlp_info = { | |
1910 | .description = "CDC NCM (SEND ZLP)", | |
1911 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1912 | | FLAG_LINK_INTR | FLAG_ETHER | FLAG_SEND_ZLP, | |
1913 | .bind = cdc_ncm_bind, | |
1914 | .unbind = cdc_ncm_unbind, | |
1915 | .manage_power = usbnet_manage_power, | |
1916 | .status = cdc_ncm_status, | |
1917 | .rx_fixup = cdc_ncm_rx_fixup, | |
1918 | .tx_fixup = cdc_ncm_tx_fixup, | |
748064b5 | 1919 | .set_rx_mode = usbnet_cdc_update_filter, |
266c0190 DC |
1920 | }; |
1921 | ||
f94898ea DW |
1922 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1923 | static const struct driver_info wwan_info = { | |
1924 | .description = "Mobile Broadband Network Device", | |
1925 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1926 | | FLAG_LINK_INTR | FLAG_WWAN, |
f94898ea DW |
1927 | .bind = cdc_ncm_bind, |
1928 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1929 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1930 | .status = cdc_ncm_status, |
1931 | .rx_fixup = cdc_ncm_rx_fixup, | |
1932 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1933 | .set_rx_mode = usbnet_cdc_update_filter, |
f94898ea DW |
1934 | }; |
1935 | ||
2f62d5aa WS |
1936 | /* Same as wwan_info, but with FLAG_NOARP */ |
1937 | static const struct driver_info wwan_noarp_info = { | |
1938 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1939 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1940 | | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, |
2f62d5aa WS |
1941 | .bind = cdc_ncm_bind, |
1942 | .unbind = cdc_ncm_unbind, | |
2f62d5aa WS |
1943 | .manage_power = usbnet_manage_power, |
1944 | .status = cdc_ncm_status, | |
1945 | .rx_fixup = cdc_ncm_rx_fixup, | |
1946 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1947 | .set_rx_mode = usbnet_cdc_update_filter, |
2f62d5aa WS |
1948 | }; |
1949 | ||
f94898ea DW |
1950 | static const struct usb_device_id cdc_devs[] = { |
1951 | /* Ericsson MBM devices like F5521gw */ | |
1952 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1953 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1954 | .idVendor = 0x0bdb, | |
1955 | .bInterfaceClass = USB_CLASS_COMM, | |
1956 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1957 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1958 | .driver_info = (unsigned long) &wwan_info, | |
1959 | }, | |
1960 | ||
79f42232 DP |
1961 | /* Telit LE910 V2 */ |
1962 | { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, | |
1963 | USB_CLASS_COMM, | |
1964 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1965 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1966 | }, | |
1967 | ||
670c0d62 DP |
1968 | /* DW5812 LTE Verizon Mobile Broadband Card |
1969 | * Unlike DW5550 this device requires FLAG_NOARP | |
1970 | */ | |
1971 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, | |
1972 | USB_CLASS_COMM, | |
1973 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1974 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1975 | }, | |
1976 | ||
fb83d5f2 DP |
1977 | /* DW5813 LTE AT&T Mobile Broadband Card |
1978 | * Unlike DW5550 this device requires FLAG_NOARP | |
1979 | */ | |
1980 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, | |
1981 | USB_CLASS_COMM, | |
1982 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1983 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1984 | }, | |
1985 | ||
f3a1ef9c PM |
1986 | /* Dell branded MBM devices like DW5550 */ |
1987 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1988 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1989 | .idVendor = 0x413c, | |
1990 | .bInterfaceClass = USB_CLASS_COMM, | |
1991 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1992 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1993 | .driver_info = (unsigned long) &wwan_info, | |
1994 | }, | |
1995 | ||
1996 | /* Toshiba branded MBM devices */ | |
1997 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1998 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1999 | .idVendor = 0x0930, | |
2000 | .bInterfaceClass = USB_CLASS_COMM, | |
2001 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
2002 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
2003 | .driver_info = (unsigned long) &wwan_info, | |
2004 | }, | |
2005 | ||
1f84eab4 BM |
2006 | /* tag Huawei devices as wwan */ |
2007 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
2008 | USB_CLASS_COMM, | |
2009 | USB_CDC_SUBCLASS_NCM, | |
2010 | USB_CDC_PROTO_NONE), | |
2011 | .driver_info = (unsigned long)&wwan_info, | |
2012 | }, | |
2013 | ||
2f62d5aa WS |
2014 | /* Infineon(now Intel) HSPA Modem platform */ |
2015 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
2016 | USB_CLASS_COMM, | |
2017 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2018 | .driver_info = (unsigned long)&wwan_noarp_info, | |
2019 | }, | |
2020 | ||
3b638f0f AM |
2021 | /* u-blox TOBY-L4 */ |
2022 | { USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010, | |
2023 | USB_CLASS_COMM, | |
2024 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2025 | .driver_info = (unsigned long)&wwan_info, | |
2026 | }, | |
2027 | ||
266c0190 DC |
2028 | /* DisplayLink docking stations */ |
2029 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
2030 | | USB_DEVICE_ID_MATCH_VENDOR, | |
2031 | .idVendor = 0x17e9, | |
2032 | .bInterfaceClass = USB_CLASS_COMM, | |
2033 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
2034 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
2035 | .driver_info = (unsigned long)&cdc_ncm_zlp_info, | |
2036 | }, | |
2037 | ||
f94898ea DW |
2038 | /* Generic CDC-NCM devices */ |
2039 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
2040 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2041 | .driver_info = (unsigned long)&cdc_ncm_info, | |
2042 | }, | |
2043 | { | |
2044 | }, | |
2045 | }; | |
2046 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
2047 | ||
900d495a AO |
2048 | static struct usb_driver cdc_ncm_driver = { |
2049 | .name = "cdc_ncm", | |
2050 | .id_table = cdc_devs, | |
085e50e1 BM |
2051 | .probe = usbnet_probe, |
2052 | .disconnect = usbnet_disconnect, | |
900d495a AO |
2053 | .suspend = usbnet_suspend, |
2054 | .resume = usbnet_resume, | |
85e3c65f | 2055 | .reset_resume = usbnet_resume, |
900d495a | 2056 | .supports_autosuspend = 1, |
e1f12eb6 | 2057 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
2058 | }; |
2059 | ||
d632eb1b | 2060 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
2061 | |
2062 | MODULE_AUTHOR("Hans Petter Selasky"); | |
2063 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
2064 | MODULE_LICENSE("Dual BSD/GPL"); |