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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 | ||
7e01c7f7 | 184 | if (le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) == 0) |
2be6d4d1 | 185 | max = CDC_NCM_NTB_MAX_SIZE_TX; /* dwNtbOutMaxSize not set */ |
7e01c7f7 TA |
186 | else |
187 | max = clamp_t(u32, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize), | |
188 | USB_CDC_NCM_NTB_MIN_OUT_SIZE, | |
189 | CDC_NCM_NTB_MAX_SIZE_TX); | |
289507d3 BM |
190 | |
191 | /* some devices set dwNtbOutMaxSize too low for the above default */ | |
192 | min = min(min, max); | |
193 | ||
194 | val = clamp_t(u32, new_tx, min, max); | |
195 | if (val != new_tx) | |
196 | dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); | |
197 | ||
198 | return val; | |
199 | } | |
200 | ||
86fe2f8a Y |
201 | static ssize_t min_tx_pkt_show(struct device *d, |
202 | struct device_attribute *attr, char *buf) | |
39eb7e0e BM |
203 | { |
204 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
205 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
206 | ||
207 | return sprintf(buf, "%u\n", ctx->min_tx_pkt); | |
208 | } | |
209 | ||
86fe2f8a Y |
210 | static ssize_t rx_max_show(struct device *d, |
211 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
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->rx_max); | |
217 | } | |
218 | ||
86fe2f8a Y |
219 | static ssize_t tx_max_show(struct device *d, |
220 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
221 | { |
222 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
223 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
224 | ||
225 | return sprintf(buf, "%u\n", ctx->tx_max); | |
226 | } | |
227 | ||
86fe2f8a Y |
228 | static ssize_t tx_timer_usecs_show(struct device *d, |
229 | struct device_attribute *attr, char *buf) | |
289507d3 BM |
230 | { |
231 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
232 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
233 | ||
234 | return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); | |
235 | } | |
236 | ||
86fe2f8a Y |
237 | static ssize_t min_tx_pkt_store(struct device *d, |
238 | struct device_attribute *attr, | |
239 | const char *buf, size_t len) | |
39eb7e0e BM |
240 | { |
241 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
242 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
243 | unsigned long val; | |
244 | ||
245 | /* no need to restrict values - anything from 0 to infinity is OK */ | |
246 | if (kstrtoul(buf, 0, &val)) | |
247 | return -EINVAL; | |
248 | ||
249 | ctx->min_tx_pkt = val; | |
250 | return len; | |
251 | } | |
252 | ||
86fe2f8a Y |
253 | static ssize_t rx_max_store(struct device *d, |
254 | struct device_attribute *attr, | |
255 | const char *buf, size_t len) | |
289507d3 BM |
256 | { |
257 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
258 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
259 | unsigned long val; | |
260 | ||
261 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) | |
262 | return -EINVAL; | |
263 | ||
264 | cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); | |
265 | return len; | |
266 | } | |
267 | ||
86fe2f8a Y |
268 | static ssize_t tx_max_store(struct device *d, |
269 | struct device_attribute *attr, | |
270 | const char *buf, size_t len) | |
289507d3 BM |
271 | { |
272 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
273 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
274 | unsigned long val; | |
275 | ||
276 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) | |
277 | return -EINVAL; | |
278 | ||
279 | cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); | |
280 | return len; | |
281 | } | |
282 | ||
86fe2f8a Y |
283 | static ssize_t tx_timer_usecs_store(struct device *d, |
284 | struct device_attribute *attr, | |
285 | const char *buf, size_t len) | |
289507d3 BM |
286 | { |
287 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
288 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
289 | ssize_t ret; | |
290 | unsigned long val; | |
291 | ||
292 | ret = kstrtoul(buf, 0, &val); | |
293 | if (ret) | |
294 | return ret; | |
295 | if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) | |
296 | return -EINVAL; | |
297 | ||
298 | spin_lock_bh(&ctx->mtx); | |
299 | ctx->timer_interval = val * NSEC_PER_USEC; | |
300 | if (!ctx->timer_interval) | |
301 | ctx->tx_timer_pending = 0; | |
302 | spin_unlock_bh(&ctx->mtx); | |
303 | return len; | |
304 | } | |
305 | ||
86fe2f8a Y |
306 | static DEVICE_ATTR_RW(min_tx_pkt); |
307 | static DEVICE_ATTR_RW(rx_max); | |
308 | static DEVICE_ATTR_RW(tx_max); | |
309 | static DEVICE_ATTR_RW(tx_timer_usecs); | |
289507d3 | 310 | |
404814af BM |
311 | static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) |
312 | { | |
313 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
314 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
315 | ||
316 | return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); | |
317 | } | |
318 | ||
319 | static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
320 | { | |
321 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
322 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
323 | bool enable; | |
324 | ||
c2cce3a6 | 325 | if (kstrtobool(buf, &enable)) |
404814af BM |
326 | return -EINVAL; |
327 | ||
328 | /* no change? */ | |
329 | if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
330 | return len; | |
331 | ||
0fa81b30 AB |
332 | if (enable) { |
333 | if (ctx->is_ndp16 && !ctx->delayed_ndp16) { | |
334 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
335 | if (!ctx->delayed_ndp16) | |
336 | return -ENOMEM; | |
337 | } | |
338 | if (!ctx->is_ndp16 && !ctx->delayed_ndp32) { | |
339 | ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
340 | if (!ctx->delayed_ndp32) | |
341 | return -ENOMEM; | |
342 | } | |
404814af BM |
343 | } |
344 | ||
345 | /* flush pending data before changing flag */ | |
346 | netif_tx_lock_bh(dev->net); | |
347 | usbnet_start_xmit(NULL, dev->net); | |
348 | spin_lock_bh(&ctx->mtx); | |
349 | if (enable) | |
350 | ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; | |
351 | else | |
352 | ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; | |
353 | spin_unlock_bh(&ctx->mtx); | |
354 | netif_tx_unlock_bh(dev->net); | |
355 | ||
356 | return len; | |
357 | } | |
358 | static DEVICE_ATTR_RW(ndp_to_end); | |
359 | ||
871578c9 BM |
360 | #define NCM_PARM_ATTR(name, format, tocpu) \ |
361 | static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ | |
362 | { \ | |
363 | struct usbnet *dev = netdev_priv(to_net_dev(d)); \ | |
364 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ | |
365 | return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ | |
366 | } \ | |
d61e4038 | 367 | static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL) |
871578c9 BM |
368 | |
369 | NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); | |
370 | NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); | |
371 | NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); | |
372 | NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); | |
373 | NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); | |
374 | NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); | |
375 | NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); | |
376 | NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); | |
377 | NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); | |
378 | NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); | |
379 | ||
289507d3 | 380 | static struct attribute *cdc_ncm_sysfs_attrs[] = { |
39eb7e0e | 381 | &dev_attr_min_tx_pkt.attr, |
404814af | 382 | &dev_attr_ndp_to_end.attr, |
289507d3 BM |
383 | &dev_attr_rx_max.attr, |
384 | &dev_attr_tx_max.attr, | |
385 | &dev_attr_tx_timer_usecs.attr, | |
871578c9 BM |
386 | &dev_attr_bmNtbFormatsSupported.attr, |
387 | &dev_attr_dwNtbInMaxSize.attr, | |
388 | &dev_attr_wNdpInDivisor.attr, | |
389 | &dev_attr_wNdpInPayloadRemainder.attr, | |
390 | &dev_attr_wNdpInAlignment.attr, | |
391 | &dev_attr_dwNtbOutMaxSize.attr, | |
392 | &dev_attr_wNdpOutDivisor.attr, | |
393 | &dev_attr_wNdpOutPayloadRemainder.attr, | |
394 | &dev_attr_wNdpOutAlignment.attr, | |
395 | &dev_attr_wNtbOutMaxDatagrams.attr, | |
289507d3 BM |
396 | NULL, |
397 | }; | |
398 | ||
43f51ef1 | 399 | static const struct attribute_group cdc_ncm_sysfs_attr_group = { |
289507d3 BM |
400 | .name = "cdc_ncm", |
401 | .attrs = cdc_ncm_sysfs_attrs, | |
402 | }; | |
403 | ||
404 | /* handle rx_max and tx_max changes */ | |
405 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) | |
406 | { | |
407 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
408 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
409 | u32 val; | |
410 | ||
411 | val = cdc_ncm_check_rx_max(dev, new_rx); | |
5aa73d5d BM |
412 | |
413 | /* inform device about NTB input size changes */ | |
414 | if (val != ctx->rx_max) { | |
415 | __le32 dwNtbInMaxSize = cpu_to_le32(val); | |
416 | ||
417 | dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); | |
68864abf | 418 | |
68864abf | 419 | /* tell device to use new size */ |
5aa73d5d BM |
420 | if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
421 | USB_TYPE_CLASS | USB_DIR_OUT | |
422 | | USB_RECIP_INTERFACE, | |
423 | 0, iface_no, &dwNtbInMaxSize, 4) < 0) | |
424 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); | |
425 | else | |
426 | ctx->rx_max = val; | |
427 | } | |
428 | ||
f42763db BM |
429 | /* usbnet use these values for sizing rx queues */ |
430 | if (dev->rx_urb_size != ctx->rx_max) { | |
431 | dev->rx_urb_size = ctx->rx_max; | |
432 | if (netif_running(dev->net)) | |
433 | usbnet_unlink_rx_urbs(dev); | |
434 | } | |
435 | ||
289507d3 | 436 | val = cdc_ncm_check_tx_max(dev, new_tx); |
5aa73d5d BM |
437 | if (val != ctx->tx_max) |
438 | dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); | |
08c74fc9 BM |
439 | |
440 | /* Adding a pad byte here if necessary simplifies the handling | |
441 | * in cdc_ncm_fill_tx_frame, making tx_max always represent | |
442 | * the real skb max size. | |
443 | * | |
444 | * We cannot use dev->maxpacket here because this is called from | |
445 | * .bind which is called before usbnet sets up dev->maxpacket | |
446 | */ | |
68864abf | 447 | if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && |
e13adbfa | 448 | val % usb_maxpacket(dev->udev, dev->out) == 0) |
68864abf BM |
449 | val++; |
450 | ||
451 | /* we might need to flush any pending tx buffers if running */ | |
452 | if (netif_running(dev->net) && val > ctx->tx_max) { | |
453 | netif_tx_lock_bh(dev->net); | |
454 | usbnet_start_xmit(NULL, dev->net); | |
1ba5d0ff BM |
455 | /* make sure tx_curr_skb is reallocated if it was empty */ |
456 | if (ctx->tx_curr_skb) { | |
457 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
458 | ctx->tx_curr_skb = NULL; | |
459 | } | |
68864abf BM |
460 | ctx->tx_max = val; |
461 | netif_tx_unlock_bh(dev->net); | |
462 | } else { | |
463 | ctx->tx_max = val; | |
464 | } | |
08c74fc9 | 465 | |
08c74fc9 | 466 | dev->hard_mtu = ctx->tx_max; |
68864abf BM |
467 | |
468 | /* max qlen depend on hard_mtu and rx_urb_size */ | |
469 | usbnet_update_max_qlen(dev); | |
43e4c6df BM |
470 | |
471 | /* never pad more than 3 full USB packets per transfer */ | |
e13adbfa | 472 | ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out), |
43e4c6df | 473 | CDC_NCM_MIN_TX_PKT, ctx->tx_max); |
5aa73d5d BM |
474 | } |
475 | ||
f8afb73d BM |
476 | /* helpers for NCM and MBIM differences */ |
477 | static u8 cdc_ncm_flags(struct usbnet *dev) | |
900d495a | 478 | { |
bed6f762 | 479 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
900d495a | 480 | |
f8afb73d BM |
481 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) |
482 | return ctx->mbim_desc->bmNetworkCapabilities; | |
483 | if (ctx->func_desc) | |
484 | return ctx->func_desc->bmNetworkCapabilities; | |
485 | return 0; | |
486 | } | |
487 | ||
488 | static int cdc_ncm_eth_hlen(struct usbnet *dev) | |
489 | { | |
490 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
491 | return 0; | |
492 | return ETH_HLEN; | |
493 | } | |
494 | ||
495 | static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) | |
496 | { | |
497 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
498 | return CDC_MBIM_MIN_DATAGRAM_SIZE; | |
499 | return CDC_NCM_MIN_DATAGRAM_SIZE; | |
500 | } | |
501 | ||
502 | static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) | |
503 | { | |
504 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
505 | ||
506 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) | |
507 | return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
508 | if (ctx->ether_desc) | |
509 | return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
510 | return CDC_NCM_MAX_DATAGRAM_SIZE; | |
511 | } | |
512 | ||
513 | /* initial one-time device setup. MUST be called with the data interface | |
514 | * in altsetting 0 | |
515 | */ | |
516 | static int cdc_ncm_init(struct usbnet *dev) | |
517 | { | |
518 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
519 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
520 | int err; | |
900d495a | 521 | |
90b8b037 ML |
522 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
523 | USB_TYPE_CLASS | USB_DIR_IN | |
524 | |USB_RECIP_INTERFACE, | |
ff0992e9 BM |
525 | 0, iface_no, &ctx->ncm_parm, |
526 | sizeof(ctx->ncm_parm)); | |
36c35416 | 527 | if (err < 0) { |
59ede316 BM |
528 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
529 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
530 | } |
531 | ||
f8afb73d BM |
532 | /* set CRC Mode */ |
533 | if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { | |
534 | dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); | |
535 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, | |
536 | USB_TYPE_CLASS | USB_DIR_OUT | |
537 | | USB_RECIP_INTERFACE, | |
538 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
539 | iface_no, NULL, 0); | |
540 | if (err < 0) | |
541 | dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); | |
542 | } | |
543 | ||
0fa81b30 AB |
544 | /* use ndp16 by default */ |
545 | ctx->is_ndp16 = 1; | |
546 | ||
f8afb73d BM |
547 | /* set NTB format, if both formats are supported. |
548 | * | |
549 | * "The host shall only send this command while the NCM Data | |
550 | * Interface is in alternate setting 0." | |
551 | */ | |
d22adbfb DC |
552 | if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & |
553 | USB_CDC_NCM_NTB32_SUPPORTED) { | |
0fa81b30 AB |
554 | if (ctx->drvflags & CDC_NCM_FLAG_PREFER_NTB32) { |
555 | ctx->is_ndp16 = 0; | |
556 | dev_dbg(&dev->intf->dev, "Setting NTB format to 32-bit\n"); | |
557 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
558 | USB_TYPE_CLASS | USB_DIR_OUT | |
559 | | USB_RECIP_INTERFACE, | |
560 | USB_CDC_NCM_NTB32_FORMAT, | |
561 | iface_no, NULL, 0); | |
562 | } else { | |
563 | ctx->is_ndp16 = 1; | |
564 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); | |
565 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
566 | USB_TYPE_CLASS | USB_DIR_OUT | |
567 | | USB_RECIP_INTERFACE, | |
568 | USB_CDC_NCM_NTB16_FORMAT, | |
569 | iface_no, NULL, 0); | |
570 | } | |
571 | if (err < 0) { | |
572 | ctx->is_ndp16 = 1; | |
f8afb73d | 573 | dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); |
0fa81b30 | 574 | } |
f8afb73d BM |
575 | } |
576 | ||
577 | /* set initial device values */ | |
ff0992e9 BM |
578 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); |
579 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
580 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
581 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
582 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b | 583 | /* devices prior to NCM Errata shall set this field to zero */ |
ff0992e9 | 584 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); |
47175e5f | 585 | |
ae223cd4 BM |
586 | dev_dbg(&dev->intf->dev, |
587 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
588 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
f8afb73d | 589 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); |
900d495a | 590 | |
84e77a8b AO |
591 | /* max count of tx datagrams */ |
592 | if ((ctx->tx_max_datagrams == 0) || | |
593 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
594 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a | 595 | |
70559b89 | 596 | /* set up maximum NDP size */ |
0fa81b30 AB |
597 | if (ctx->is_ndp16) |
598 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); | |
599 | else | |
600 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp32) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe32); | |
70559b89 | 601 | |
6c4e548f BM |
602 | /* initial coalescing timer interval */ |
603 | ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; | |
604 | ||
f8afb73d BM |
605 | return 0; |
606 | } | |
607 | ||
608 | /* set a new max datagram size */ | |
609 | static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) | |
610 | { | |
611 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
612 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
613 | __le16 max_datagram_size; | |
614 | u16 mbim_mtu; | |
615 | int err; | |
616 | ||
617 | /* set default based on descriptors */ | |
618 | ctx->max_datagram_size = clamp_t(u32, new_size, | |
619 | cdc_ncm_min_dgram_size(dev), | |
620 | CDC_NCM_MAX_DATAGRAM_SIZE); | |
621 | ||
622 | /* inform the device about the selected Max Datagram Size? */ | |
623 | if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
624 | goto out; | |
625 | ||
626 | /* read current mtu value from device */ | |
627 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
628 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
332f989a | 629 | 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); |
a56dcc6b | 630 | if (err != sizeof(max_datagram_size)) { |
f8afb73d BM |
631 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); |
632 | goto out; | |
633 | } | |
634 | ||
635 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) | |
636 | goto out; | |
637 | ||
638 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
639 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
640 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
332f989a | 641 | 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); |
f8afb73d BM |
642 | if (err < 0) |
643 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
644 | ||
645 | out: | |
646 | /* set MTU to max supported by the device if necessary */ | |
647 | dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); | |
648 | ||
f62c4f38 | 649 | /* do not exceed operator preferred MTU */ |
f8afb73d BM |
650 | if (ctx->mbim_extended_desc) { |
651 | mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); | |
652 | if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) | |
653 | dev->net->mtu = mbim_mtu; | |
654 | } | |
655 | } | |
656 | ||
657 | static void cdc_ncm_fix_modulus(struct usbnet *dev) | |
658 | { | |
659 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
660 | u32 val; | |
900d495a AO |
661 | |
662 | /* | |
663 | * verify that the structure alignment is: | |
664 | * - power of two | |
665 | * - not greater than the maximum transmit length | |
666 | * - not less than four bytes | |
667 | */ | |
668 | val = ctx->tx_ndp_modulus; | |
669 | ||
670 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
671 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 672 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
673 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
674 | } | |
675 | ||
676 | /* | |
677 | * verify that the payload alignment is: | |
678 | * - power of two | |
679 | * - not greater than the maximum transmit length | |
680 | * - not less than four bytes | |
681 | */ | |
682 | val = ctx->tx_modulus; | |
683 | ||
684 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
685 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 686 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
687 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
688 | } | |
689 | ||
690 | /* verify the payload remainder */ | |
691 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 692 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
693 | ctx->tx_remainder = 0; |
694 | } | |
695 | ||
696 | /* adjust TX-remainder according to NCM specification. */ | |
f8afb73d | 697 | ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & |
2d1c4310 | 698 | (ctx->tx_modulus - 1)); |
f8afb73d | 699 | } |
900d495a | 700 | |
f8afb73d BM |
701 | static int cdc_ncm_setup(struct usbnet *dev) |
702 | { | |
703 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
50f1cb1c BM |
704 | u32 def_rx, def_tx; |
705 | ||
f62c4f38 | 706 | /* be conservative when selecting initial buffer size to |
50f1cb1c BM |
707 | * increase the number of hosts this will work for |
708 | */ | |
709 | def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, | |
710 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
711 | def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, | |
712 | le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
900d495a | 713 | |
f8afb73d | 714 | /* clamp rx_max and tx_max and inform device */ |
50f1cb1c | 715 | cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); |
259fef03 | 716 | |
f8afb73d BM |
717 | /* sanitize the modulus and remainder values */ |
718 | cdc_ncm_fix_modulus(dev); | |
259fef03 | 719 | |
f8afb73d BM |
720 | /* set max datagram size */ |
721 | cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); | |
900d495a AO |
722 | return 0; |
723 | } | |
724 | ||
725 | static void | |
ff1632aa | 726 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 727 | { |
ff1632aa | 728 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
729 | u8 ep; |
730 | ||
731 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
900d495a | 732 | e = intf->cur_altsetting->endpoint + ep; |
3fe4b335 BM |
733 | |
734 | /* ignore endpoints which cannot transfer data */ | |
735 | if (!usb_endpoint_maxp(&e->desc)) | |
736 | continue; | |
737 | ||
900d495a AO |
738 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
739 | case USB_ENDPOINT_XFER_INT: | |
740 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
741 | if (!dev->status) |
742 | dev->status = e; | |
900d495a AO |
743 | } |
744 | break; | |
745 | ||
746 | case USB_ENDPOINT_XFER_BULK: | |
747 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
748 | if (!in) |
749 | in = e; | |
900d495a | 750 | } else { |
ff1632aa BM |
751 | if (!out) |
752 | out = e; | |
900d495a AO |
753 | } |
754 | break; | |
755 | ||
756 | default: | |
757 | break; | |
758 | } | |
759 | } | |
ff1632aa BM |
760 | if (in && !dev->in) |
761 | dev->in = usb_rcvbulkpipe(dev->udev, | |
762 | in->desc.bEndpointAddress & | |
763 | USB_ENDPOINT_NUMBER_MASK); | |
764 | if (out && !dev->out) | |
765 | dev->out = usb_sndbulkpipe(dev->udev, | |
766 | out->desc.bEndpointAddress & | |
767 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
768 | } |
769 | ||
770 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
771 | { | |
772 | if (ctx == NULL) | |
773 | return; | |
774 | ||
900d495a AO |
775 | if (ctx->tx_rem_skb != NULL) { |
776 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
777 | ctx->tx_rem_skb = NULL; | |
778 | } | |
779 | ||
780 | if (ctx->tx_curr_skb != NULL) { | |
781 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
782 | ctx->tx_curr_skb = NULL; | |
783 | } | |
784 | ||
0fa81b30 AB |
785 | if (ctx->is_ndp16) |
786 | kfree(ctx->delayed_ndp16); | |
787 | else | |
788 | kfree(ctx->delayed_ndp32); | |
4a0e3e98 | 789 | |
900d495a AO |
790 | kfree(ctx); |
791 | } | |
792 | ||
1dfddff5 BM |
793 | /* we need to override the usbnet change_mtu ndo for two reasons: |
794 | * - respect the negotiated maximum datagram size | |
795 | * - avoid unwanted changes to rx and tx buffers | |
796 | */ | |
797 | int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) | |
798 | { | |
799 | struct usbnet *dev = netdev_priv(net); | |
05a56487 | 800 | |
1eb2cded | 801 | WRITE_ONCE(net->mtu, new_mtu); |
05a56487 RR |
802 | cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); |
803 | ||
1dfddff5 BM |
804 | return 0; |
805 | } | |
806 | EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); | |
807 | ||
808 | static const struct net_device_ops cdc_ncm_netdev_ops = { | |
809 | .ndo_open = usbnet_open, | |
810 | .ndo_stop = usbnet_stop, | |
811 | .ndo_start_xmit = usbnet_start_xmit, | |
812 | .ndo_tx_timeout = usbnet_tx_timeout, | |
37a2ebdd | 813 | .ndo_set_rx_mode = usbnet_set_rx_mode, |
323955a0 | 814 | .ndo_get_stats64 = dev_get_tstats64, |
1dfddff5 BM |
815 | .ndo_change_mtu = cdc_ncm_change_mtu, |
816 | .ndo_set_mac_address = eth_mac_addr, | |
817 | .ndo_validate_addr = eth_validate_addr, | |
818 | }; | |
819 | ||
4a0e3e98 | 820 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) |
900d495a AO |
821 | { |
822 | struct cdc_ncm_ctx *ctx; | |
823 | struct usb_driver *driver; | |
824 | u8 *buf; | |
825 | int len; | |
826 | int temp; | |
827 | u8 iface_no; | |
77b0a099 | 828 | struct usb_cdc_parsed_header hdr; |
900d495a | 829 | |
c796984f | 830 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
831 | if (!ctx) |
832 | return -ENOMEM; | |
900d495a | 833 | |
4f4e5436 ERB |
834 | ctx->dev = dev; |
835 | ||
c84ff1d6 AO |
836 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
837 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
4f4e5436 | 838 | tasklet_setup(&ctx->bh, cdc_ncm_txpath_bh); |
c84ff1d6 | 839 | atomic_set(&ctx->stop, 0); |
900d495a | 840 | spin_lock_init(&ctx->mtx); |
900d495a AO |
841 | |
842 | /* store ctx pointer in device data field */ | |
843 | dev->data[0] = (unsigned long)ctx; | |
844 | ||
9fe0234c BM |
845 | /* only the control interface can be successfully probed */ |
846 | ctx->control = intf; | |
847 | ||
900d495a AO |
848 | /* get some pointers */ |
849 | driver = driver_of(intf); | |
850 | buf = intf->cur_altsetting->extra; | |
851 | len = intf->cur_altsetting->extralen; | |
852 | ||
900d495a | 853 | /* parse through descriptors associated with control interface */ |
77b0a099 ON |
854 | cdc_parse_cdc_header(&hdr, intf, buf, len); |
855 | ||
6527f833 BM |
856 | if (hdr.usb_cdc_union_desc) |
857 | ctx->data = usb_ifnum_to_if(dev->udev, | |
858 | hdr.usb_cdc_union_desc->bSlaveInterface0); | |
77b0a099 ON |
859 | ctx->ether_desc = hdr.usb_cdc_ether_desc; |
860 | ctx->func_desc = hdr.usb_cdc_ncm_desc; | |
861 | ctx->mbim_desc = hdr.usb_cdc_mbim_desc; | |
862 | ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; | |
900d495a | 863 | |
9992c2e2 | 864 | /* some buggy devices have an IAD but no CDC Union */ |
6527f833 | 865 | if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
866 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
867 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
868 | } |
869 | ||
900d495a | 870 | /* check if we got everything */ |
f8afb73d | 871 | if (!ctx->data) { |
492bbe7f | 872 | dev_err(&intf->dev, "CDC Union missing and no IAD found\n"); |
900d495a | 873 | goto error; |
296e81f8 | 874 | } |
f8afb73d BM |
875 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { |
876 | if (!ctx->mbim_desc) { | |
492bbe7f | 877 | dev_err(&intf->dev, "MBIM functional descriptor missing\n"); |
f8afb73d BM |
878 | goto error; |
879 | } | |
880 | } else { | |
881 | if (!ctx->ether_desc || !ctx->func_desc) { | |
492bbe7f | 882 | dev_err(&intf->dev, "NCM or ECM functional descriptors missing\n"); |
f8afb73d BM |
883 | goto error; |
884 | } | |
885 | } | |
900d495a | 886 | |
bbc8d922 BM |
887 | /* claim data interface, if different from control */ |
888 | if (ctx->data != ctx->control) { | |
889 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 | 890 | if (temp) { |
492bbe7f | 891 | dev_err(&intf->dev, "failed to claim data intf\n"); |
bbc8d922 | 892 | goto error; |
296e81f8 | 893 | } |
bbc8d922 | 894 | } |
900d495a AO |
895 | |
896 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
897 | ||
7b8076ce DP |
898 | /* Device-specific flags */ |
899 | ctx->drvflags = drvflags; | |
900 | ||
48906f62 BM |
901 | /* Reset data interface. Some devices will not reset properly |
902 | * unless they are configured first. Toggle the altsetting to | |
7b8076ce DP |
903 | * force a reset. |
904 | * Some other devices do not work properly with this procedure | |
905 | * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE | |
48906f62 | 906 | */ |
7b8076ce DP |
907 | if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) |
908 | usb_set_interface(dev->udev, iface_no, data_altsetting); | |
909 | ||
900d495a | 910 | temp = usb_set_interface(dev->udev, iface_no, 0); |
296e81f8 BM |
911 | if (temp) { |
912 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 913 | goto error2; |
296e81f8 | 914 | } |
900d495a | 915 | |
08c74fc9 BM |
916 | /* initialize basic device settings */ |
917 | if (cdc_ncm_init(dev)) | |
ff0992e9 BM |
918 | goto error2; |
919 | ||
c086e709 BM |
920 | /* Some firmwares need a pause here or they will silently fail |
921 | * to set up the interface properly. This value was decided | |
922 | * empirically on a Sierra Wireless MC7455 running 02.08.02.00 | |
923 | * firmware. | |
924 | */ | |
925 | usleep_range(10000, 20000); | |
926 | ||
900d495a | 927 | /* configure data interface */ |
38396e4c | 928 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
929 | if (temp) { |
930 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 931 | goto error2; |
296e81f8 | 932 | } |
900d495a | 933 | |
ff1632aa BM |
934 | cdc_ncm_find_endpoints(dev, ctx->data); |
935 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
936 | if (!dev->in || !dev->out || !dev->status) { |
937 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 938 | goto error2; |
296e81f8 | 939 | } |
900d495a | 940 | |
900d495a | 941 | usb_set_intfdata(ctx->control, dev); |
900d495a | 942 | |
38396e4c GS |
943 | if (ctx->ether_desc) { |
944 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 | 945 | if (temp) { |
492bbe7f | 946 | dev_err(&intf->dev, "failed to get mac address\n"); |
38396e4c | 947 | goto error2; |
296e81f8 BM |
948 | } |
949 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 950 | } |
900d495a | 951 | |
08c74fc9 BM |
952 | /* finish setting up the device specific data */ |
953 | cdc_ncm_setup(dev); | |
ff0992e9 | 954 | |
4a0e3e98 EM |
955 | /* Allocate the delayed NDP if needed. */ |
956 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
0fa81b30 AB |
957 | if (ctx->is_ndp16) { |
958 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
959 | if (!ctx->delayed_ndp16) | |
960 | goto error2; | |
961 | } else { | |
962 | ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
963 | if (!ctx->delayed_ndp32) | |
964 | goto error2; | |
965 | } | |
4a0e3e98 EM |
966 | dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); |
967 | } | |
968 | ||
6c4e548f BM |
969 | /* override ethtool_ops */ |
970 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
971 | ||
289507d3 BM |
972 | /* add our sysfs attrs */ |
973 | dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; | |
974 | ||
1dfddff5 BM |
975 | /* must handle MTU changes */ |
976 | dev->net->netdev_ops = &cdc_ncm_netdev_ops; | |
f77f0aee | 977 | dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); |
1dfddff5 | 978 | |
900d495a AO |
979 | return 0; |
980 | ||
19694ac8 AO |
981 | error2: |
982 | usb_set_intfdata(ctx->control, NULL); | |
983 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
984 | if (ctx->data != ctx->control) |
985 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
986 | error: |
987 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
988 | dev->data[0] = 0; | |
296e81f8 | 989 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
990 | return -ENODEV; |
991 | } | |
c91ce3b6 | 992 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 993 | |
c91ce3b6 | 994 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
995 | { |
996 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 997 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
998 | |
999 | if (ctx == NULL) | |
1000 | return; /* no setup */ | |
1001 | ||
c84ff1d6 AO |
1002 | atomic_set(&ctx->stop, 1); |
1003 | ||
2aee167c | 1004 | hrtimer_cancel(&ctx->tx_timer); |
c84ff1d6 AO |
1005 | |
1006 | tasklet_kill(&ctx->bh); | |
1007 | ||
bbc8d922 BM |
1008 | /* handle devices with combined control and data interface */ |
1009 | if (ctx->control == ctx->data) | |
1010 | ctx->data = NULL; | |
1011 | ||
19694ac8 AO |
1012 | /* disconnect master --> disconnect slave */ |
1013 | if (intf == ctx->control && ctx->data) { | |
1014 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 1015 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 1016 | ctx->data = NULL; |
900d495a | 1017 | |
19694ac8 AO |
1018 | } else if (intf == ctx->data && ctx->control) { |
1019 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 1020 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 1021 | ctx->control = NULL; |
900d495a AO |
1022 | } |
1023 | ||
3e515665 | 1024 | usb_set_intfdata(intf, NULL); |
900d495a AO |
1025 | cdc_ncm_free(ctx); |
1026 | } | |
c91ce3b6 | 1027 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 1028 | |
50a0ffaf BM |
1029 | /* Return the number of the MBIM control interface altsetting iff it |
1030 | * is preferred and available, | |
1e8bbe6c | 1031 | */ |
50a0ffaf | 1032 | u8 cdc_ncm_select_altsetting(struct usb_interface *intf) |
38396e4c | 1033 | { |
1e8bbe6c | 1034 | struct usb_host_interface *alt; |
38396e4c | 1035 | |
bd329e12 BM |
1036 | /* The MBIM spec defines a NCM compatible default altsetting, |
1037 | * which we may have matched: | |
1038 | * | |
1039 | * "Functions that implement both NCM 1.0 and MBIM (an | |
1040 | * “NCM/MBIM function”) according to this recommendation | |
1041 | * shall provide two alternate settings for the | |
1042 | * Communication Interface. Alternate setting 0, and the | |
1043 | * associated class and endpoint descriptors, shall be | |
1044 | * constructed according to the rules given for the | |
1045 | * Communication Interface in section 5 of [USBNCM10]. | |
1046 | * Alternate setting 1, and the associated class and | |
1047 | * endpoint descriptors, shall be constructed according to | |
1048 | * the rules given in section 6 (USB Device Model) of this | |
1049 | * specification." | |
bd329e12 | 1050 | */ |
50a0ffaf BM |
1051 | if (intf->num_altsetting < 2) |
1052 | return intf->cur_altsetting->desc.bAlternateSetting; | |
1053 | ||
1054 | if (prefer_mbim) { | |
1e8bbe6c | 1055 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); |
50a0ffaf BM |
1056 | if (alt && cdc_ncm_comm_intf_is_mbim(alt)) |
1057 | return CDC_NCM_COMM_ALTSETTING_MBIM; | |
f350ca03 | 1058 | } |
50a0ffaf | 1059 | return CDC_NCM_COMM_ALTSETTING_NCM; |
1e8bbe6c BM |
1060 | } |
1061 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
1062 | ||
1063 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
1064 | { | |
1e8bbe6c | 1065 | /* MBIM backwards compatible function? */ |
50a0ffaf | 1066 | if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) |
1e8bbe6c | 1067 | return -ENODEV; |
bd329e12 | 1068 | |
4a0e3e98 EM |
1069 | /* The NCM data altsetting is fixed, so we hard-coded it. |
1070 | * Additionally, generic NCM devices are assumed to accept arbitrarily | |
1071 | * placed NDP. | |
1072 | */ | |
4d06dd53 | 1073 | return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); |
38396e4c GS |
1074 | } |
1075 | ||
c78b7c58 | 1076 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 1077 | { |
c78b7c58 BM |
1078 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
1079 | ||
1080 | if (skb->len + align > max) | |
1081 | align = max - skb->len; | |
1082 | if (align && skb_tailroom(skb) >= align) | |
b080db58 | 1083 | skb_put_zero(skb, align); |
c78b7c58 BM |
1084 | } |
1085 | ||
1086 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
1087 | * allocating a new one within skb | |
1088 | */ | |
0fa81b30 | 1089 | 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 |
1090 | { |
1091 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
1092 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
1093 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
1094 | ||
4a0e3e98 EM |
1095 | /* If NDP should be moved to the end of the NCM package, we can't follow the |
1096 | * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and | |
1097 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1098 | */ | |
f8c0cfa5 | 1099 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { |
4a0e3e98 EM |
1100 | if (ctx->delayed_ndp16->dwSignature == sign) |
1101 | return ctx->delayed_ndp16; | |
1102 | ||
f8c0cfa5 BM |
1103 | /* We can only push a single NDP to the end. Return |
1104 | * NULL to send what we've already got and queue this | |
1105 | * skb for later. | |
1106 | */ | |
1107 | else if (ctx->delayed_ndp16->dwSignature) | |
1108 | return NULL; | |
1109 | } | |
1110 | ||
c78b7c58 BM |
1111 | /* follow the chain of NDPs, looking for a match */ |
1112 | while (ndpoffset) { | |
1113 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
1114 | if (ndp16->dwSignature == sign) | |
1115 | return ndp16; | |
1116 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1117 | } | |
1118 | ||
1119 | /* align new NDP */ | |
4a0e3e98 | 1120 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
e1069bbf | 1121 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); |
c78b7c58 BM |
1122 | |
1123 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
e1069bbf | 1124 | if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) |
c78b7c58 BM |
1125 | return NULL; |
1126 | ||
1127 | /* link to it */ | |
1128 | if (ndp16) | |
1129 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
1130 | else | |
1131 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
1132 | ||
1133 | /* push a new empty NDP */ | |
4a0e3e98 | 1134 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
ad941e69 | 1135 | ndp16 = skb_put_zero(skb, ctx->max_ndp_size); |
4a0e3e98 EM |
1136 | else |
1137 | ndp16 = ctx->delayed_ndp16; | |
1138 | ||
c78b7c58 BM |
1139 | ndp16->dwSignature = sign; |
1140 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
1141 | return ndp16; | |
900d495a AO |
1142 | } |
1143 | ||
0fa81b30 AB |
1144 | static struct usb_cdc_ncm_ndp32 *cdc_ncm_ndp32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) |
1145 | { | |
1146 | struct usb_cdc_ncm_ndp32 *ndp32 = NULL; | |
1147 | struct usb_cdc_ncm_nth32 *nth32 = (void *)skb->data; | |
1148 | size_t ndpoffset = le32_to_cpu(nth32->dwNdpIndex); | |
1149 | ||
1150 | /* If NDP should be moved to the end of the NCM package, we can't follow the | |
1151 | * NTH32 header as we would normally do. NDP isn't written to the SKB yet, and | |
1152 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1153 | */ | |
1154 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
1155 | if (ctx->delayed_ndp32->dwSignature == sign) | |
1156 | return ctx->delayed_ndp32; | |
1157 | ||
1158 | /* We can only push a single NDP to the end. Return | |
1159 | * NULL to send what we've already got and queue this | |
1160 | * skb for later. | |
1161 | */ | |
1162 | else if (ctx->delayed_ndp32->dwSignature) | |
1163 | return NULL; | |
1164 | } | |
1165 | ||
1166 | /* follow the chain of NDPs, looking for a match */ | |
1167 | while (ndpoffset) { | |
1168 | ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb->data + ndpoffset); | |
1169 | if (ndp32->dwSignature == sign) | |
1170 | return ndp32; | |
1171 | ndpoffset = le32_to_cpu(ndp32->dwNextNdpIndex); | |
1172 | } | |
1173 | ||
1174 | /* align new NDP */ | |
1175 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
1176 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); | |
1177 | ||
1178 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
1179 | if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) | |
1180 | return NULL; | |
1181 | ||
1182 | /* link to it */ | |
1183 | if (ndp32) | |
1184 | ndp32->dwNextNdpIndex = cpu_to_le32(skb->len); | |
1185 | else | |
1186 | nth32->dwNdpIndex = cpu_to_le32(skb->len); | |
1187 | ||
1188 | /* push a new empty NDP */ | |
1189 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
1190 | ndp32 = skb_put_zero(skb, ctx->max_ndp_size); | |
1191 | else | |
1192 | ndp32 = ctx->delayed_ndp32; | |
1193 | ||
1194 | ndp32->dwSignature = sign; | |
5d0ab06b | 1195 | ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32)); |
0fa81b30 AB |
1196 | return ndp32; |
1197 | } | |
1198 | ||
c91ce3b6 | 1199 | struct sk_buff * |
bed6f762 | 1200 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 1201 | { |
bed6f762 | 1202 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
0fa81b30 AB |
1203 | union { |
1204 | struct usb_cdc_ncm_nth16 *nth16; | |
1205 | struct usb_cdc_ncm_nth32 *nth32; | |
1206 | } nth; | |
1207 | union { | |
1208 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1209 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1210 | } ndp; | |
900d495a | 1211 | struct sk_buff *skb_out; |
c78b7c58 | 1212 | u16 n = 0, index, ndplen; |
84e77a8b | 1213 | u8 ready2send = 0; |
4a0e3e98 | 1214 | u32 delayed_ndp_size; |
aeca3a77 | 1215 | size_t padding_count; |
4a0e3e98 EM |
1216 | |
1217 | /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated | |
1218 | * accordingly. Otherwise, we should check here. | |
1219 | */ | |
1220 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) | |
7a68d725 JS |
1221 | delayed_ndp_size = ctx->max_ndp_size + |
1222 | max_t(u32, | |
1223 | ctx->tx_ndp_modulus, | |
1224 | ctx->tx_modulus + ctx->tx_remainder) - 1; | |
4a0e3e98 EM |
1225 | else |
1226 | delayed_ndp_size = 0; | |
900d495a AO |
1227 | |
1228 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 1229 | if (skb != NULL) { |
900d495a | 1230 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
1231 | swap(sign, ctx->tx_rem_sign); |
1232 | } else { | |
84e77a8b | 1233 | ready2send = 1; |
c78b7c58 | 1234 | } |
900d495a AO |
1235 | |
1236 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 1237 | skb_out = ctx->tx_curr_skb; |
900d495a | 1238 | |
c78b7c58 BM |
1239 | /* allocate a new OUT skb */ |
1240 | if (!skb_out) { | |
e1069bbf JB |
1241 | if (ctx->tx_low_mem_val == 0) { |
1242 | ctx->tx_curr_size = ctx->tx_max; | |
1243 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1244 | /* If the memory allocation fails we will wait longer | |
1245 | * each time before attempting another full size | |
1246 | * allocation again to not overload the system | |
1247 | * further. | |
1248 | */ | |
1249 | if (skb_out == NULL) { | |
7e01c7f7 TA |
1250 | /* If even the smallest allocation fails, abort. */ |
1251 | if (ctx->tx_curr_size == USB_CDC_NCM_NTB_MIN_OUT_SIZE) | |
1252 | goto alloc_failed; | |
e1069bbf JB |
1253 | ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1, |
1254 | (unsigned)CDC_NCM_LOW_MEM_MAX_CNT); | |
1255 | ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt; | |
1256 | } | |
1257 | } | |
900d495a | 1258 | if (skb_out == NULL) { |
e1069bbf JB |
1259 | /* See if a very small allocation is possible. |
1260 | * We will send this packet immediately and hope | |
1261 | * that there is more memory available later. | |
1262 | */ | |
1263 | if (skb) | |
1264 | ctx->tx_curr_size = max(skb->len, | |
1265 | (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE); | |
1266 | else | |
1267 | ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE; | |
1268 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1269 | ||
1270 | /* No allocation possible so we will abort */ | |
7e01c7f7 TA |
1271 | if (!skb_out) |
1272 | goto alloc_failed; | |
e1069bbf | 1273 | ctx->tx_low_mem_val--; |
900d495a | 1274 | } |
0fa81b30 AB |
1275 | if (ctx->is_ndp16) { |
1276 | /* fill out the initial 16-bit NTB header */ | |
1277 | nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16)); | |
1278 | nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
1279 | nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
1280 | nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
1281 | } else { | |
1282 | /* fill out the initial 32-bit NTB header */ | |
1283 | nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32)); | |
1284 | nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN); | |
1285 | nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32)); | |
1286 | nth.nth32->wSequence = cpu_to_le16(ctx->tx_seq++); | |
1287 | } | |
900d495a | 1288 | |
c78b7c58 | 1289 | /* count total number of frames in this NTB */ |
900d495a | 1290 | ctx->tx_curr_frame_num = 0; |
beeecd42 BM |
1291 | |
1292 | /* recent payload counter for this skb_out */ | |
1293 | ctx->tx_curr_frame_payload = 0; | |
900d495a AO |
1294 | } |
1295 | ||
c78b7c58 BM |
1296 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
1297 | /* send any remaining skb first */ | |
900d495a AO |
1298 | if (skb == NULL) { |
1299 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 1300 | sign = ctx->tx_rem_sign; |
900d495a AO |
1301 | ctx->tx_rem_skb = NULL; |
1302 | ||
1303 | /* check for end of skb */ | |
1304 | if (skb == NULL) | |
1305 | break; | |
1306 | } | |
1307 | ||
c78b7c58 | 1308 | /* get the appropriate NDP for this skb */ |
0fa81b30 AB |
1309 | if (ctx->is_ndp16) |
1310 | ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
1311 | else | |
1312 | ndp.ndp32 = cdc_ncm_ndp32(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
c78b7c58 BM |
1313 | |
1314 | /* align beginning of next frame */ | |
e1069bbf | 1315 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size); |
c78b7c58 BM |
1316 | |
1317 | /* check if we had enough room left for both NDP and frame */ | |
0fa81b30 AB |
1318 | if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) || |
1319 | skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) { | |
900d495a AO |
1320 | if (n == 0) { |
1321 | /* won't fit, MTU problem? */ | |
1322 | dev_kfree_skb_any(skb); | |
1323 | skb = NULL; | |
bed6f762 | 1324 | dev->net->stats.tx_dropped++; |
900d495a AO |
1325 | } else { |
1326 | /* no room for skb - store for later */ | |
1327 | if (ctx->tx_rem_skb != NULL) { | |
1328 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 1329 | dev->net->stats.tx_dropped++; |
900d495a AO |
1330 | } |
1331 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 1332 | ctx->tx_rem_sign = sign; |
900d495a | 1333 | skb = NULL; |
84e77a8b | 1334 | ready2send = 1; |
beeecd42 | 1335 | ctx->tx_reason_ntb_full++; /* count reason for transmitting */ |
900d495a AO |
1336 | } |
1337 | break; | |
1338 | } | |
1339 | ||
ef9ac209 | 1340 | /* calculate frame number within this NDP */ |
0fa81b30 AB |
1341 | if (ctx->is_ndp16) { |
1342 | ndplen = le16_to_cpu(ndp.ndp16->wLength); | |
1343 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
1344 | ||
1345 | /* OK, add this skb */ | |
1346 | ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
1347 | ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
1348 | ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
1349 | } else { | |
1350 | ndplen = le16_to_cpu(ndp.ndp32->wLength); | |
1351 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1; | |
900d495a | 1352 | |
0fa81b30 AB |
1353 | ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len); |
1354 | ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len); | |
1355 | ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32)); | |
1356 | } | |
59ae1d12 | 1357 | skb_put_data(skb_out, skb->data, skb->len); |
beeecd42 | 1358 | ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ |
900d495a AO |
1359 | dev_kfree_skb_any(skb); |
1360 | skb = NULL; | |
c78b7c58 BM |
1361 | |
1362 | /* send now if this NDP is full */ | |
1363 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
1364 | ready2send = 1; | |
beeecd42 | 1365 | ctx->tx_reason_ndp_full++; /* count reason for transmitting */ |
c78b7c58 BM |
1366 | break; |
1367 | } | |
900d495a AO |
1368 | } |
1369 | ||
1370 | /* free up any dangling skb */ | |
1371 | if (skb != NULL) { | |
1372 | dev_kfree_skb_any(skb); | |
1373 | skb = NULL; | |
bed6f762 | 1374 | dev->net->stats.tx_dropped++; |
900d495a AO |
1375 | } |
1376 | ||
1377 | ctx->tx_curr_frame_num = n; | |
1378 | ||
1379 | if (n == 0) { | |
1380 | /* wait for more frames */ | |
1381 | /* push variables */ | |
1382 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1383 | goto exit_no_skb; |
1384 | ||
6c4e548f | 1385 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { |
900d495a AO |
1386 | /* wait for more frames */ |
1387 | /* push variables */ | |
1388 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1389 | /* set the pending count */ |
1390 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 1391 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
1392 | goto exit_no_skb; |
1393 | ||
1394 | } else { | |
beeecd42 BM |
1395 | if (n == ctx->tx_max_datagrams) |
1396 | ctx->tx_reason_max_datagram++; /* count reason for transmitting */ | |
900d495a AO |
1397 | /* frame goes out */ |
1398 | /* variables will be reset at next call */ | |
1399 | } | |
1400 | ||
4a0e3e98 EM |
1401 | /* If requested, put NDP at end of frame. */ |
1402 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
0fa81b30 AB |
1403 | if (ctx->is_ndp16) { |
1404 | nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1405 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); | |
1406 | nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len); | |
1407 | skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size); | |
1408 | ||
1409 | /* Zero out delayed NDP - signature checking will naturally fail. */ | |
1410 | ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); | |
1411 | } else { | |
1412 | nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; | |
1413 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); | |
1414 | nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len); | |
1415 | skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size); | |
4a0e3e98 | 1416 | |
0fa81b30 AB |
1417 | ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size); |
1418 | } | |
4a0e3e98 EM |
1419 | } |
1420 | ||
43e4c6df | 1421 | /* If collected data size is less or equal ctx->min_tx_pkt |
20572226 BM |
1422 | * bytes, we send buffers as it is. If we get more data, it |
1423 | * would be more efficient for USB HS mobile device with DMA | |
1424 | * engine to receive a full size NTB, than canceling DMA | |
1425 | * transfer and receiving a short packet. | |
4d619f62 BM |
1426 | * |
1427 | * This optimization support is pointless if we end up sending | |
1428 | * a ZLP after full sized NTBs. | |
900d495a | 1429 | */ |
4d619f62 | 1430 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
aeca3a77 | 1431 | skb_out->len > ctx->min_tx_pkt) { |
e1069bbf | 1432 | padding_count = ctx->tx_curr_size - skb_out->len; |
7a68d725 JS |
1433 | if (!WARN_ON(padding_count > ctx->tx_curr_size)) |
1434 | skb_put_zero(skb_out, padding_count); | |
e1069bbf | 1435 | } else if (skb_out->len < ctx->tx_curr_size && |
aeca3a77 | 1436 | (skb_out->len % dev->maxpacket) == 0) { |
634fef61 | 1437 | skb_put_u8(skb_out, 0); /* force short packet */ |
aeca3a77 | 1438 | } |
900d495a | 1439 | |
c78b7c58 | 1440 | /* set final frame length */ |
0fa81b30 AB |
1441 | if (ctx->is_ndp16) { |
1442 | nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1443 | nth.nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
1444 | } else { | |
1445 | nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; | |
1446 | nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len); | |
1447 | } | |
900d495a AO |
1448 | |
1449 | /* return skb */ | |
1450 | ctx->tx_curr_skb = NULL; | |
beeecd42 BM |
1451 | |
1452 | /* keep private stats: framing overhead and number of NTBs */ | |
1453 | ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; | |
1454 | ctx->tx_ntbs++; | |
1455 | ||
7a1e890e | 1456 | /* usbnet will count all the framing overhead by default. |
beeecd42 BM |
1457 | * Adjust the stats so that the tx_bytes counter show real |
1458 | * payload data instead. | |
1459 | */ | |
7a1e890e | 1460 | usbnet_set_skb_tx_stats(skb_out, n, |
44f6731d | 1461 | (long)ctx->tx_curr_frame_payload - skb_out->len); |
1e9e39f4 | 1462 | |
900d495a AO |
1463 | return skb_out; |
1464 | ||
7e01c7f7 TA |
1465 | alloc_failed: |
1466 | if (skb) { | |
1467 | dev_kfree_skb_any(skb); | |
1468 | dev->net->stats.tx_dropped++; | |
1469 | } | |
900d495a | 1470 | exit_no_skb: |
046c6594 BM |
1471 | /* Start timer, if there is a remaining non-empty skb */ |
1472 | if (ctx->tx_curr_skb != NULL && n > 0) | |
c84ff1d6 | 1473 | cdc_ncm_tx_timeout_start(ctx); |
900d495a AO |
1474 | return NULL; |
1475 | } | |
c91ce3b6 | 1476 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
1477 | |
1478 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
1479 | { | |
1480 | /* start timer, if not already started */ | |
c84ff1d6 AO |
1481 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
1482 | hrtimer_start(&ctx->tx_timer, | |
8b0e1953 | 1483 | ctx->timer_interval, |
c84ff1d6 | 1484 | HRTIMER_MODE_REL); |
900d495a AO |
1485 | } |
1486 | ||
c84ff1d6 | 1487 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 1488 | { |
c84ff1d6 AO |
1489 | struct cdc_ncm_ctx *ctx = |
1490 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 1491 | |
c84ff1d6 AO |
1492 | if (!atomic_read(&ctx->stop)) |
1493 | tasklet_schedule(&ctx->bh); | |
1494 | return HRTIMER_NORESTART; | |
1495 | } | |
900d495a | 1496 | |
4f4e5436 | 1497 | static void cdc_ncm_txpath_bh(struct tasklet_struct *t) |
c84ff1d6 | 1498 | { |
4f4e5436 ERB |
1499 | struct cdc_ncm_ctx *ctx = from_tasklet(ctx, t, bh); |
1500 | struct usbnet *dev = ctx->dev; | |
900d495a | 1501 | |
f1ed409f | 1502 | spin_lock(&ctx->mtx); |
c84ff1d6 AO |
1503 | if (ctx->tx_timer_pending != 0) { |
1504 | ctx->tx_timer_pending--; | |
900d495a | 1505 | cdc_ncm_tx_timeout_start(ctx); |
f1ed409f | 1506 | spin_unlock(&ctx->mtx); |
bed6f762 | 1507 | } else if (dev->net != NULL) { |
beeecd42 | 1508 | ctx->tx_reason_timeout++; /* count reason for transmitting */ |
f1ed409f | 1509 | spin_unlock(&ctx->mtx); |
bed6f762 BM |
1510 | netif_tx_lock_bh(dev->net); |
1511 | usbnet_start_xmit(NULL, dev->net); | |
1512 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba | 1513 | } else { |
f1ed409f | 1514 | spin_unlock(&ctx->mtx); |
f742aa8a | 1515 | } |
900d495a AO |
1516 | } |
1517 | ||
2f69702c | 1518 | struct sk_buff * |
900d495a AO |
1519 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
1520 | { | |
1521 | struct sk_buff *skb_out; | |
1522 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
1523 | |
1524 | /* | |
1525 | * The Ethernet API we are using does not support transmitting | |
1526 | * multiple Ethernet frames in a single call. This driver will | |
1527 | * accumulate multiple Ethernet frames and send out a larger | |
1528 | * USB frame when the USB buffer is full or when a single jiffies | |
1529 | * timeout happens. | |
1530 | */ | |
1531 | if (ctx == NULL) | |
1532 | goto error; | |
1533 | ||
c84ff1d6 | 1534 | spin_lock_bh(&ctx->mtx); |
0fa81b30 AB |
1535 | |
1536 | if (ctx->is_ndp16) | |
1537 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); | |
1538 | else | |
1539 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)); | |
1540 | ||
c84ff1d6 | 1541 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
1542 | return skb_out; |
1543 | ||
1544 | error: | |
1545 | if (skb != NULL) | |
1546 | dev_kfree_skb_any(skb); | |
1547 | ||
1548 | return NULL; | |
1549 | } | |
2f69702c | 1550 | EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); |
900d495a | 1551 | |
ff06ab13 | 1552 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 1553 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 1554 | { |
ae223cd4 | 1555 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 1556 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
1557 | int len; |
1558 | int ret = -EINVAL; | |
900d495a | 1559 | |
900d495a AO |
1560 | if (ctx == NULL) |
1561 | goto error; | |
1562 | ||
d5ddb4a5 AO |
1563 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
1564 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 1565 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
1566 | goto error; |
1567 | } | |
1568 | ||
d5ddb4a5 | 1569 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 1570 | |
986e10d6 | 1571 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
1572 | netif_dbg(dev, rx_err, dev->net, |
1573 | "invalid NTH16 signature <%#010x>\n", | |
1574 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
1575 | goto error; |
1576 | } | |
1577 | ||
d5ddb4a5 AO |
1578 | len = le16_to_cpu(nth16->wBlockLength); |
1579 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
1580 | netif_dbg(dev, rx_err, dev->net, |
1581 | "unsupported NTB block length %u/%u\n", len, | |
1582 | ctx->rx_max); | |
900d495a AO |
1583 | goto error; |
1584 | } | |
1585 | ||
d5ddb4a5 | 1586 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
1587 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
1588 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
1589 | netif_dbg(dev, rx_err, dev->net, | |
1590 | "sequence number glitch prev=%d curr=%d\n", | |
1591 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
1592 | } |
1593 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
1594 | ||
ff06ab13 BM |
1595 | ret = le16_to_cpu(nth16->wNdpIndex); |
1596 | error: | |
1597 | return ret; | |
1598 | } | |
c91ce3b6 | 1599 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 | 1600 | |
0fa81b30 AB |
1601 | int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
1602 | { | |
1603 | struct usbnet *dev = netdev_priv(skb_in->dev); | |
1604 | struct usb_cdc_ncm_nth32 *nth32; | |
1605 | int len; | |
1606 | int ret = -EINVAL; | |
1607 | ||
1608 | if (ctx == NULL) | |
1609 | goto error; | |
1610 | ||
1611 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) + | |
1612 | sizeof(struct usb_cdc_ncm_ndp32))) { | |
1613 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); | |
1614 | goto error; | |
1615 | } | |
1616 | ||
1617 | nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data; | |
1618 | ||
1619 | if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) { | |
1620 | netif_dbg(dev, rx_err, dev->net, | |
1621 | "invalid NTH32 signature <%#010x>\n", | |
1622 | le32_to_cpu(nth32->dwSignature)); | |
1623 | goto error; | |
1624 | } | |
1625 | ||
1626 | len = le32_to_cpu(nth32->dwBlockLength); | |
1627 | if (len > ctx->rx_max) { | |
1628 | netif_dbg(dev, rx_err, dev->net, | |
1629 | "unsupported NTB block length %u/%u\n", len, | |
1630 | ctx->rx_max); | |
1631 | goto error; | |
1632 | } | |
1633 | ||
1634 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth32->wSequence) && | |
1635 | (ctx->rx_seq || le16_to_cpu(nth32->wSequence)) && | |
1636 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) { | |
1637 | netif_dbg(dev, rx_err, dev->net, | |
1638 | "sequence number glitch prev=%d curr=%d\n", | |
1639 | ctx->rx_seq, le16_to_cpu(nth32->wSequence)); | |
1640 | } | |
1641 | ctx->rx_seq = le16_to_cpu(nth32->wSequence); | |
1642 | ||
1643 | ret = le32_to_cpu(nth32->dwNdpIndex); | |
1644 | error: | |
1645 | return ret; | |
1646 | } | |
1647 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32); | |
1648 | ||
ff06ab13 | 1649 | /* verify NDP header and return number of datagrams, or negative error */ |
c91ce3b6 | 1650 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 1651 | { |
ae223cd4 | 1652 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
1653 | struct usb_cdc_ncm_ndp16 *ndp16; |
1654 | int ret = -EINVAL; | |
1655 | ||
75d67d35 | 1656 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
1657 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
1658 | ndpoffset); | |
900d495a AO |
1659 | goto error; |
1660 | } | |
75d67d35 | 1661 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 1662 | |
d5ddb4a5 | 1663 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
1664 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
1665 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 1666 | goto error; |
900d495a AO |
1667 | } |
1668 | ||
ff06ab13 | 1669 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
1670 | sizeof(struct usb_cdc_ncm_ndp16)) / |
1671 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 1672 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 1673 | |
ae223cd4 BM |
1674 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
1675 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
1676 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 1677 | ret = -EINVAL; |
900d495a AO |
1678 | } |
1679 | ||
ff06ab13 BM |
1680 | error: |
1681 | return ret; | |
1682 | } | |
c91ce3b6 | 1683 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 | 1684 | |
0fa81b30 AB |
1685 | /* verify NDP header and return number of datagrams, or negative error */ |
1686 | int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset) | |
1687 | { | |
1688 | struct usbnet *dev = netdev_priv(skb_in->dev); | |
1689 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1690 | int ret = -EINVAL; | |
1691 | ||
1692 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) { | |
1693 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", | |
1694 | ndpoffset); | |
1695 | goto error; | |
1696 | } | |
1697 | ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); | |
1698 | ||
1699 | if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) { | |
1700 | netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n", | |
1701 | le16_to_cpu(ndp32->wLength)); | |
1702 | goto error; | |
1703 | } | |
1704 | ||
1705 | ret = ((le16_to_cpu(ndp32->wLength) - | |
1706 | sizeof(struct usb_cdc_ncm_ndp32)) / | |
1707 | sizeof(struct usb_cdc_ncm_dpe32)); | |
1708 | ret--; /* we process NDP entries except for the last one */ | |
1709 | ||
1710 | if ((sizeof(struct usb_cdc_ncm_ndp32) + | |
1711 | ret * (sizeof(struct usb_cdc_ncm_dpe32))) > skb_in->len) { | |
1712 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
1713 | ret = -EINVAL; | |
1714 | } | |
1715 | ||
1716 | error: | |
1717 | return ret; | |
1718 | } | |
1719 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp32); | |
1720 | ||
2f69702c | 1721 | int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) |
ff06ab13 BM |
1722 | { |
1723 | struct sk_buff *skb; | |
1724 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
8d2b1a1e | 1725 | unsigned int len; |
ff06ab13 BM |
1726 | int nframes; |
1727 | int x; | |
8d2b1a1e | 1728 | unsigned int offset; |
0fa81b30 AB |
1729 | union { |
1730 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1731 | struct usb_cdc_ncm_ndp32 *ndp32; | |
1732 | } ndp; | |
1733 | union { | |
1734 | struct usb_cdc_ncm_dpe16 *dpe16; | |
1735 | struct usb_cdc_ncm_dpe32 *dpe32; | |
1736 | } dpe; | |
1737 | ||
ff06ab13 BM |
1738 | int ndpoffset; |
1739 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
beeecd42 | 1740 | u32 payload = 0; |
ff06ab13 | 1741 | |
0fa81b30 AB |
1742 | if (ctx->is_ndp16) |
1743 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
1744 | else | |
1745 | ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in); | |
1746 | ||
ff06ab13 BM |
1747 | if (ndpoffset < 0) |
1748 | goto error; | |
1749 | ||
1750 | next_ndp: | |
0fa81b30 AB |
1751 | if (ctx->is_ndp16) { |
1752 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
1753 | if (nframes < 0) | |
1754 | goto error; | |
ff06ab13 | 1755 | |
0fa81b30 | 1756 | ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
ff06ab13 | 1757 | |
0fa81b30 AB |
1758 | if (ndp.ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
1759 | netif_dbg(dev, rx_err, dev->net, | |
1760 | "invalid DPT16 signature <%#010x>\n", | |
1761 | le32_to_cpu(ndp.ndp16->dwSignature)); | |
1762 | goto err_ndp; | |
1763 | } | |
1764 | dpe.dpe16 = ndp.ndp16->dpe16; | |
1765 | } else { | |
1766 | nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset); | |
1767 | if (nframes < 0) | |
1768 | goto error; | |
1769 | ||
1770 | ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); | |
1771 | ||
1772 | if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) { | |
1773 | netif_dbg(dev, rx_err, dev->net, | |
1774 | "invalid DPT32 signature <%#010x>\n", | |
1775 | le32_to_cpu(ndp.ndp32->dwSignature)); | |
1776 | goto err_ndp; | |
1777 | } | |
1778 | dpe.dpe32 = ndp.ndp32->dpe32; | |
ff06ab13 | 1779 | } |
900d495a | 1780 | |
0fa81b30 AB |
1781 | for (x = 0; x < nframes; x++) { |
1782 | if (ctx->is_ndp16) { | |
1783 | offset = le16_to_cpu(dpe.dpe16->wDatagramIndex); | |
1784 | len = le16_to_cpu(dpe.dpe16->wDatagramLength); | |
1785 | } else { | |
1786 | offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex); | |
1787 | len = le32_to_cpu(dpe.dpe32->dwDatagramLength); | |
1788 | } | |
900d495a AO |
1789 | |
1790 | /* | |
1791 | * CDC NCM ch. 3.7 | |
1792 | * All entries after first NULL entry are to be ignored | |
1793 | */ | |
d5ddb4a5 | 1794 | if ((offset == 0) || (len == 0)) { |
900d495a | 1795 | if (!x) |
75d67d35 | 1796 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1797 | break; |
1798 | } | |
1799 | ||
8d2b1a1e ON |
1800 | /* sanity checking - watch out for integer wrap*/ |
1801 | if ((offset > skb_in->len) || (len > skb_in->len - offset) || | |
d5ddb4a5 | 1802 | (len > ctx->rx_max) || (len < ETH_HLEN)) { |
ae223cd4 BM |
1803 | netif_dbg(dev, rx_err, dev->net, |
1804 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
1805 | x, offset, len, skb_in); | |
900d495a | 1806 | if (!x) |
75d67d35 | 1807 | goto err_ndp; |
900d495a AO |
1808 | break; |
1809 | ||
1810 | } else { | |
1e2c6117 BM |
1811 | /* create a fresh copy to reduce truesize */ |
1812 | skb = netdev_alloc_skb_ip_align(dev->net, len); | |
9e56790a JJ |
1813 | if (!skb) |
1814 | goto error; | |
59ae1d12 | 1815 | skb_put_data(skb, skb_in->data + offset, len); |
900d495a | 1816 | usbnet_skb_return(dev, skb); |
beeecd42 | 1817 | payload += len; /* count payload bytes in this NTB */ |
900d495a | 1818 | } |
0fa81b30 AB |
1819 | |
1820 | if (ctx->is_ndp16) | |
1821 | dpe.dpe16++; | |
1822 | else | |
1823 | dpe.dpe32++; | |
900d495a | 1824 | } |
75d67d35 BM |
1825 | err_ndp: |
1826 | /* are there more NDPs to process? */ | |
0fa81b30 AB |
1827 | if (ctx->is_ndp16) |
1828 | ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex); | |
1829 | else | |
1830 | ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex); | |
1831 | ||
75d67d35 BM |
1832 | if (ndpoffset && loopcount--) |
1833 | goto next_ndp; | |
1834 | ||
beeecd42 BM |
1835 | /* update stats */ |
1836 | ctx->rx_overhead += skb_in->len - payload; | |
1837 | ctx->rx_ntbs++; | |
1838 | ||
900d495a AO |
1839 | return 1; |
1840 | error: | |
1841 | return 0; | |
1842 | } | |
2f69702c | 1843 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); |
900d495a AO |
1844 | |
1845 | static void | |
bed6f762 | 1846 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1847 | struct usb_cdc_speed_change *data) |
900d495a | 1848 | { |
eb47c274 ON |
1849 | /* RTL8156 shipped before 2021 sends notification about every 32ms. */ |
1850 | dev->rx_speed = le32_to_cpu(data->DLBitRRate); | |
1851 | dev->tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1852 | } |
1853 | ||
1854 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1855 | { | |
900d495a AO |
1856 | struct usb_cdc_notification *event; |
1857 | ||
900d495a AO |
1858 | if (urb->actual_length < sizeof(*event)) |
1859 | return; | |
1860 | ||
1861 | /* test for split data in 8-byte chunks */ | |
1862 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1863 | cdc_ncm_speed_change(dev, |
84e77a8b | 1864 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1865 | return; |
1866 | } | |
1867 | ||
1868 | event = urb->transfer_buffer; | |
1869 | ||
1870 | switch (event->bNotificationType) { | |
1871 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1872 | /* | |
1873 | * According to the CDC NCM specification ch.7.1 | |
1874 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1875 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1876 | */ | |
eb47c274 ON |
1877 | /* RTL8156 shipped before 2021 sends notification about |
1878 | * every 32ms. Don't forward notification if state is same. | |
1879 | */ | |
de658a19 GG |
1880 | if (netif_carrier_ok(dev->net) != !!event->wValue) |
1881 | usbnet_link_change(dev, !!event->wValue, 0); | |
900d495a AO |
1882 | break; |
1883 | ||
1884 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1885 | if (urb->actual_length < (sizeof(*event) + |
1886 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1887 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1888 | else | |
bed6f762 BM |
1889 | cdc_ncm_speed_change(dev, |
1890 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1891 | break; |
1892 | ||
1893 | default: | |
67a36606 BM |
1894 | dev_dbg(&dev->udev->dev, |
1895 | "NCM: unexpected notification 0x%02x!\n", | |
1896 | event->bNotificationType); | |
900d495a AO |
1897 | break; |
1898 | } | |
1899 | } | |
1900 | ||
900d495a | 1901 | static const struct driver_info cdc_ncm_info = { |
266c0190 | 1902 | .description = "CDC NCM (NO ZLP)", |
4d06dd53 | 1903 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET |
c1a3d406 | 1904 | | FLAG_LINK_INTR | FLAG_ETHER, |
900d495a AO |
1905 | .bind = cdc_ncm_bind, |
1906 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1907 | .manage_power = usbnet_manage_power, |
900d495a AO |
1908 | .status = cdc_ncm_status, |
1909 | .rx_fixup = cdc_ncm_rx_fixup, | |
1910 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1911 | .set_rx_mode = usbnet_cdc_update_filter, |
900d495a AO |
1912 | }; |
1913 | ||
266c0190 DC |
1914 | /* Same as cdc_ncm_info, but with FLAG_SEND_ZLP */ |
1915 | static const struct driver_info cdc_ncm_zlp_info = { | |
1916 | .description = "CDC NCM (SEND ZLP)", | |
1917 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1918 | | FLAG_LINK_INTR | FLAG_ETHER | FLAG_SEND_ZLP, | |
1919 | .bind = cdc_ncm_bind, | |
1920 | .unbind = cdc_ncm_unbind, | |
1921 | .manage_power = usbnet_manage_power, | |
1922 | .status = cdc_ncm_status, | |
1923 | .rx_fixup = cdc_ncm_rx_fixup, | |
1924 | .tx_fixup = cdc_ncm_tx_fixup, | |
748064b5 | 1925 | .set_rx_mode = usbnet_cdc_update_filter, |
266c0190 DC |
1926 | }; |
1927 | ||
f94898ea DW |
1928 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1929 | static const struct driver_info wwan_info = { | |
1930 | .description = "Mobile Broadband Network Device", | |
1931 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1932 | | FLAG_LINK_INTR | FLAG_WWAN, |
f94898ea DW |
1933 | .bind = cdc_ncm_bind, |
1934 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1935 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1936 | .status = cdc_ncm_status, |
1937 | .rx_fixup = cdc_ncm_rx_fixup, | |
1938 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1939 | .set_rx_mode = usbnet_cdc_update_filter, |
f94898ea DW |
1940 | }; |
1941 | ||
2f62d5aa WS |
1942 | /* Same as wwan_info, but with FLAG_NOARP */ |
1943 | static const struct driver_info wwan_noarp_info = { | |
1944 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1945 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1946 | | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, |
2f62d5aa WS |
1947 | .bind = cdc_ncm_bind, |
1948 | .unbind = cdc_ncm_unbind, | |
2f62d5aa WS |
1949 | .manage_power = usbnet_manage_power, |
1950 | .status = cdc_ncm_status, | |
1951 | .rx_fixup = cdc_ncm_rx_fixup, | |
1952 | .tx_fixup = cdc_ncm_tx_fixup, | |
e10dcb1b | 1953 | .set_rx_mode = usbnet_cdc_update_filter, |
2f62d5aa WS |
1954 | }; |
1955 | ||
f94898ea DW |
1956 | static const struct usb_device_id cdc_devs[] = { |
1957 | /* Ericsson MBM devices like F5521gw */ | |
1958 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1959 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1960 | .idVendor = 0x0bdb, | |
1961 | .bInterfaceClass = USB_CLASS_COMM, | |
1962 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1963 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1964 | .driver_info = (unsigned long) &wwan_info, | |
1965 | }, | |
1966 | ||
79f42232 DP |
1967 | /* Telit LE910 V2 */ |
1968 | { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, | |
1969 | USB_CLASS_COMM, | |
1970 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1971 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1972 | }, | |
1973 | ||
670c0d62 DP |
1974 | /* DW5812 LTE Verizon Mobile Broadband Card |
1975 | * Unlike DW5550 this device requires FLAG_NOARP | |
1976 | */ | |
1977 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, | |
1978 | USB_CLASS_COMM, | |
1979 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1980 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1981 | }, | |
1982 | ||
fb83d5f2 DP |
1983 | /* DW5813 LTE AT&T Mobile Broadband Card |
1984 | * Unlike DW5550 this device requires FLAG_NOARP | |
1985 | */ | |
1986 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, | |
1987 | USB_CLASS_COMM, | |
1988 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1989 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1990 | }, | |
1991 | ||
f3a1ef9c PM |
1992 | /* Dell branded MBM devices like DW5550 */ |
1993 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1994 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1995 | .idVendor = 0x413c, | |
1996 | .bInterfaceClass = USB_CLASS_COMM, | |
1997 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1998 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1999 | .driver_info = (unsigned long) &wwan_info, | |
2000 | }, | |
2001 | ||
2002 | /* Toshiba branded MBM devices */ | |
2003 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
2004 | | USB_DEVICE_ID_MATCH_VENDOR, | |
2005 | .idVendor = 0x0930, | |
2006 | .bInterfaceClass = USB_CLASS_COMM, | |
2007 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
2008 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
2009 | .driver_info = (unsigned long) &wwan_info, | |
2010 | }, | |
2011 | ||
1f84eab4 BM |
2012 | /* tag Huawei devices as wwan */ |
2013 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
2014 | USB_CLASS_COMM, | |
2015 | USB_CDC_SUBCLASS_NCM, | |
2016 | USB_CDC_PROTO_NONE), | |
2017 | .driver_info = (unsigned long)&wwan_info, | |
2018 | }, | |
2019 | ||
2f62d5aa WS |
2020 | /* Infineon(now Intel) HSPA Modem platform */ |
2021 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
2022 | USB_CLASS_COMM, | |
2023 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2024 | .driver_info = (unsigned long)&wwan_noarp_info, | |
2025 | }, | |
2026 | ||
3b638f0f AM |
2027 | /* u-blox TOBY-L4 */ |
2028 | { USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010, | |
2029 | USB_CLASS_COMM, | |
2030 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2031 | .driver_info = (unsigned long)&wwan_info, | |
2032 | }, | |
2033 | ||
266c0190 DC |
2034 | /* DisplayLink docking stations */ |
2035 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
2036 | | USB_DEVICE_ID_MATCH_VENDOR, | |
2037 | .idVendor = 0x17e9, | |
2038 | .bInterfaceClass = USB_CLASS_COMM, | |
2039 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
2040 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
2041 | .driver_info = (unsigned long)&cdc_ncm_zlp_info, | |
2042 | }, | |
2043 | ||
f94898ea DW |
2044 | /* Generic CDC-NCM devices */ |
2045 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
2046 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
2047 | .driver_info = (unsigned long)&cdc_ncm_info, | |
2048 | }, | |
2049 | { | |
2050 | }, | |
2051 | }; | |
2052 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
2053 | ||
900d495a AO |
2054 | static struct usb_driver cdc_ncm_driver = { |
2055 | .name = "cdc_ncm", | |
2056 | .id_table = cdc_devs, | |
085e50e1 BM |
2057 | .probe = usbnet_probe, |
2058 | .disconnect = usbnet_disconnect, | |
900d495a AO |
2059 | .suspend = usbnet_suspend, |
2060 | .resume = usbnet_resume, | |
85e3c65f | 2061 | .reset_resume = usbnet_resume, |
900d495a | 2062 | .supports_autosuspend = 1, |
e1f12eb6 | 2063 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
2064 | }; |
2065 | ||
d632eb1b | 2066 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
2067 | |
2068 | MODULE_AUTHOR("Hans Petter Selasky"); | |
2069 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
2070 | MODULE_LICENSE("Dual BSD/GPL"); |