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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 AO |
45 | #include <linux/ethtool.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/mii.h> | |
48 | #include <linux/crc32.h> | |
49 | #include <linux/usb.h> | |
c84ff1d6 | 50 | #include <linux/hrtimer.h> |
900d495a AO |
51 | #include <linux/atomic.h> |
52 | #include <linux/usb/usbnet.h> | |
53 | #include <linux/usb/cdc.h> | |
c91ce3b6 | 54 | #include <linux/usb/cdc_ncm.h> |
900d495a | 55 | |
1e8bbe6c BM |
56 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
57 | static bool prefer_mbim = true; | |
58 | #else | |
59 | static bool prefer_mbim; | |
60 | #endif | |
61 | module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); | |
62 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); | |
63 | ||
c84ff1d6 AO |
64 | static void cdc_ncm_txpath_bh(unsigned long param); |
65 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); | |
66 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 67 | static struct usb_driver cdc_ncm_driver; |
900d495a | 68 | |
beeecd42 BM |
69 | struct cdc_ncm_stats { |
70 | char stat_string[ETH_GSTRING_LEN]; | |
71 | int sizeof_stat; | |
72 | int stat_offset; | |
73 | }; | |
74 | ||
75 | #define CDC_NCM_STAT(str, m) { \ | |
76 | .stat_string = str, \ | |
77 | .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ | |
78 | .stat_offset = offsetof(struct cdc_ncm_ctx, m) } | |
79 | #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) | |
80 | ||
81 | static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { | |
82 | CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), | |
83 | CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), | |
84 | CDC_NCM_SIMPLE_STAT(tx_reason_timeout), | |
85 | CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), | |
86 | CDC_NCM_SIMPLE_STAT(tx_overhead), | |
87 | CDC_NCM_SIMPLE_STAT(tx_ntbs), | |
88 | CDC_NCM_SIMPLE_STAT(rx_overhead), | |
89 | CDC_NCM_SIMPLE_STAT(rx_ntbs), | |
90 | }; | |
91 | ||
e1069bbf JB |
92 | #define CDC_NCM_LOW_MEM_MAX_CNT 10 |
93 | ||
beeecd42 BM |
94 | static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) |
95 | { | |
96 | switch (sset) { | |
97 | case ETH_SS_STATS: | |
98 | return ARRAY_SIZE(cdc_ncm_gstrings_stats); | |
99 | default: | |
100 | return -EOPNOTSUPP; | |
101 | } | |
102 | } | |
103 | ||
104 | static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, | |
105 | struct ethtool_stats __always_unused *stats, | |
106 | u64 *data) | |
107 | { | |
108 | struct usbnet *dev = netdev_priv(netdev); | |
109 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
110 | int i; | |
111 | char *p = NULL; | |
112 | ||
113 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
114 | p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; | |
115 | data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; | |
116 | } | |
117 | } | |
118 | ||
119 | static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) | |
120 | { | |
121 | u8 *p = data; | |
122 | int i; | |
123 | ||
124 | switch (stringset) { | |
125 | case ETH_SS_STATS: | |
126 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
127 | memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); | |
128 | p += ETH_GSTRING_LEN; | |
129 | } | |
130 | } | |
131 | } | |
132 | ||
6c4e548f BM |
133 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); |
134 | ||
6c4e548f | 135 | static const struct ethtool_ops cdc_ncm_ethtool_ops = { |
6c4e548f BM |
136 | .get_link = usbnet_get_link, |
137 | .nway_reset = usbnet_nway_reset, | |
138 | .get_drvinfo = usbnet_get_drvinfo, | |
139 | .get_msglevel = usbnet_get_msglevel, | |
140 | .set_msglevel = usbnet_set_msglevel, | |
141 | .get_ts_info = ethtool_op_get_ts_info, | |
beeecd42 BM |
142 | .get_sset_count = cdc_ncm_get_sset_count, |
143 | .get_strings = cdc_ncm_get_strings, | |
144 | .get_ethtool_stats = cdc_ncm_get_ethtool_stats, | |
d0b3ab30 PR |
145 | .get_link_ksettings = usbnet_get_link_ksettings, |
146 | .set_link_ksettings = usbnet_set_link_ksettings, | |
6c4e548f BM |
147 | }; |
148 | ||
289507d3 | 149 | static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) |
5aa73d5d BM |
150 | { |
151 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
5aa73d5d BM |
152 | u32 val, max, min; |
153 | ||
154 | /* clamp new_rx to sane values */ | |
155 | min = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
156 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
157 | ||
158 | /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ | |
159 | if (max < min) { | |
160 | dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", | |
161 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); | |
162 | max = min; | |
163 | } | |
164 | ||
165 | val = clamp_t(u32, new_rx, min, max); | |
289507d3 BM |
166 | if (val != new_rx) |
167 | dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); | |
168 | ||
169 | return val; | |
170 | } | |
171 | ||
172 | static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) | |
173 | { | |
174 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
175 | u32 val, max, min; | |
176 | ||
177 | /* clamp new_tx to sane values */ | |
178 | min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); | |
179 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
180 | ||
181 | /* some devices set dwNtbOutMaxSize too low for the above default */ | |
182 | min = min(min, max); | |
183 | ||
184 | val = clamp_t(u32, new_tx, min, max); | |
185 | if (val != new_tx) | |
186 | dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); | |
187 | ||
188 | return val; | |
189 | } | |
190 | ||
39eb7e0e BM |
191 | static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) |
192 | { | |
193 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
194 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
195 | ||
196 | return sprintf(buf, "%u\n", ctx->min_tx_pkt); | |
197 | } | |
198 | ||
289507d3 BM |
199 | static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) |
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->rx_max); | |
205 | } | |
206 | ||
207 | static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) | |
208 | { | |
209 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
210 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
211 | ||
212 | return sprintf(buf, "%u\n", ctx->tx_max); | |
213 | } | |
214 | ||
215 | static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) | |
216 | { | |
217 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
218 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
219 | ||
220 | return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); | |
221 | } | |
222 | ||
39eb7e0e BM |
223 | static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) |
224 | { | |
225 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
226 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
227 | unsigned long val; | |
228 | ||
229 | /* no need to restrict values - anything from 0 to infinity is OK */ | |
230 | if (kstrtoul(buf, 0, &val)) | |
231 | return -EINVAL; | |
232 | ||
233 | ctx->min_tx_pkt = val; | |
234 | return len; | |
235 | } | |
236 | ||
289507d3 BM |
237 | static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) |
238 | { | |
239 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
240 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
241 | unsigned long val; | |
242 | ||
243 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) | |
244 | return -EINVAL; | |
245 | ||
246 | cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); | |
247 | return len; | |
248 | } | |
249 | ||
250 | static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
251 | { | |
252 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
253 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
254 | unsigned long val; | |
255 | ||
256 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) | |
257 | return -EINVAL; | |
258 | ||
259 | cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); | |
260 | return len; | |
261 | } | |
262 | ||
263 | static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
264 | { | |
265 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
266 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
267 | ssize_t ret; | |
268 | unsigned long val; | |
269 | ||
270 | ret = kstrtoul(buf, 0, &val); | |
271 | if (ret) | |
272 | return ret; | |
273 | if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) | |
274 | return -EINVAL; | |
275 | ||
276 | spin_lock_bh(&ctx->mtx); | |
277 | ctx->timer_interval = val * NSEC_PER_USEC; | |
278 | if (!ctx->timer_interval) | |
279 | ctx->tx_timer_pending = 0; | |
280 | spin_unlock_bh(&ctx->mtx); | |
281 | return len; | |
282 | } | |
283 | ||
39eb7e0e | 284 | static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); |
289507d3 BM |
285 | static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); |
286 | static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); | |
287 | static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); | |
288 | ||
404814af BM |
289 | static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) |
290 | { | |
291 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
292 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
293 | ||
294 | return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); | |
295 | } | |
296 | ||
297 | static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
298 | { | |
299 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
300 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
301 | bool enable; | |
302 | ||
303 | if (strtobool(buf, &enable)) | |
304 | return -EINVAL; | |
305 | ||
306 | /* no change? */ | |
307 | if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
308 | return len; | |
309 | ||
310 | if (enable && !ctx->delayed_ndp16) { | |
311 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
312 | if (!ctx->delayed_ndp16) | |
313 | return -ENOMEM; | |
314 | } | |
315 | ||
316 | /* flush pending data before changing flag */ | |
317 | netif_tx_lock_bh(dev->net); | |
318 | usbnet_start_xmit(NULL, dev->net); | |
319 | spin_lock_bh(&ctx->mtx); | |
320 | if (enable) | |
321 | ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; | |
322 | else | |
323 | ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; | |
324 | spin_unlock_bh(&ctx->mtx); | |
325 | netif_tx_unlock_bh(dev->net); | |
326 | ||
327 | return len; | |
328 | } | |
329 | static DEVICE_ATTR_RW(ndp_to_end); | |
330 | ||
871578c9 BM |
331 | #define NCM_PARM_ATTR(name, format, tocpu) \ |
332 | static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ | |
333 | { \ | |
334 | struct usbnet *dev = netdev_priv(to_net_dev(d)); \ | |
335 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ | |
336 | return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ | |
337 | } \ | |
338 | static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) | |
339 | ||
340 | NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); | |
341 | NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); | |
342 | NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); | |
343 | NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); | |
344 | NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); | |
345 | NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); | |
346 | NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); | |
347 | NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); | |
348 | NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); | |
349 | NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); | |
350 | ||
289507d3 | 351 | static struct attribute *cdc_ncm_sysfs_attrs[] = { |
39eb7e0e | 352 | &dev_attr_min_tx_pkt.attr, |
404814af | 353 | &dev_attr_ndp_to_end.attr, |
289507d3 BM |
354 | &dev_attr_rx_max.attr, |
355 | &dev_attr_tx_max.attr, | |
356 | &dev_attr_tx_timer_usecs.attr, | |
871578c9 BM |
357 | &dev_attr_bmNtbFormatsSupported.attr, |
358 | &dev_attr_dwNtbInMaxSize.attr, | |
359 | &dev_attr_wNdpInDivisor.attr, | |
360 | &dev_attr_wNdpInPayloadRemainder.attr, | |
361 | &dev_attr_wNdpInAlignment.attr, | |
362 | &dev_attr_dwNtbOutMaxSize.attr, | |
363 | &dev_attr_wNdpOutDivisor.attr, | |
364 | &dev_attr_wNdpOutPayloadRemainder.attr, | |
365 | &dev_attr_wNdpOutAlignment.attr, | |
366 | &dev_attr_wNtbOutMaxDatagrams.attr, | |
289507d3 BM |
367 | NULL, |
368 | }; | |
369 | ||
43f51ef1 | 370 | static const struct attribute_group cdc_ncm_sysfs_attr_group = { |
289507d3 BM |
371 | .name = "cdc_ncm", |
372 | .attrs = cdc_ncm_sysfs_attrs, | |
373 | }; | |
374 | ||
375 | /* handle rx_max and tx_max changes */ | |
376 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) | |
377 | { | |
378 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
379 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
380 | u32 val; | |
381 | ||
382 | val = cdc_ncm_check_rx_max(dev, new_rx); | |
5aa73d5d BM |
383 | |
384 | /* inform device about NTB input size changes */ | |
385 | if (val != ctx->rx_max) { | |
386 | __le32 dwNtbInMaxSize = cpu_to_le32(val); | |
387 | ||
388 | dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); | |
68864abf | 389 | |
68864abf | 390 | /* tell device to use new size */ |
5aa73d5d BM |
391 | if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
392 | USB_TYPE_CLASS | USB_DIR_OUT | |
393 | | USB_RECIP_INTERFACE, | |
394 | 0, iface_no, &dwNtbInMaxSize, 4) < 0) | |
395 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); | |
396 | else | |
397 | ctx->rx_max = val; | |
398 | } | |
399 | ||
f42763db BM |
400 | /* usbnet use these values for sizing rx queues */ |
401 | if (dev->rx_urb_size != ctx->rx_max) { | |
402 | dev->rx_urb_size = ctx->rx_max; | |
403 | if (netif_running(dev->net)) | |
404 | usbnet_unlink_rx_urbs(dev); | |
405 | } | |
406 | ||
289507d3 | 407 | val = cdc_ncm_check_tx_max(dev, new_tx); |
5aa73d5d BM |
408 | if (val != ctx->tx_max) |
409 | dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); | |
08c74fc9 BM |
410 | |
411 | /* Adding a pad byte here if necessary simplifies the handling | |
412 | * in cdc_ncm_fill_tx_frame, making tx_max always represent | |
413 | * the real skb max size. | |
414 | * | |
415 | * We cannot use dev->maxpacket here because this is called from | |
416 | * .bind which is called before usbnet sets up dev->maxpacket | |
417 | */ | |
68864abf BM |
418 | if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && |
419 | val % usb_maxpacket(dev->udev, dev->out, 1) == 0) | |
420 | val++; | |
421 | ||
422 | /* we might need to flush any pending tx buffers if running */ | |
423 | if (netif_running(dev->net) && val > ctx->tx_max) { | |
424 | netif_tx_lock_bh(dev->net); | |
425 | usbnet_start_xmit(NULL, dev->net); | |
1ba5d0ff BM |
426 | /* make sure tx_curr_skb is reallocated if it was empty */ |
427 | if (ctx->tx_curr_skb) { | |
428 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
429 | ctx->tx_curr_skb = NULL; | |
430 | } | |
68864abf BM |
431 | ctx->tx_max = val; |
432 | netif_tx_unlock_bh(dev->net); | |
433 | } else { | |
434 | ctx->tx_max = val; | |
435 | } | |
08c74fc9 | 436 | |
08c74fc9 | 437 | dev->hard_mtu = ctx->tx_max; |
68864abf BM |
438 | |
439 | /* max qlen depend on hard_mtu and rx_urb_size */ | |
440 | usbnet_update_max_qlen(dev); | |
43e4c6df BM |
441 | |
442 | /* never pad more than 3 full USB packets per transfer */ | |
443 | ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), | |
444 | CDC_NCM_MIN_TX_PKT, ctx->tx_max); | |
5aa73d5d BM |
445 | } |
446 | ||
f8afb73d BM |
447 | /* helpers for NCM and MBIM differences */ |
448 | static u8 cdc_ncm_flags(struct usbnet *dev) | |
900d495a | 449 | { |
bed6f762 | 450 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
900d495a | 451 | |
f8afb73d BM |
452 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) |
453 | return ctx->mbim_desc->bmNetworkCapabilities; | |
454 | if (ctx->func_desc) | |
455 | return ctx->func_desc->bmNetworkCapabilities; | |
456 | return 0; | |
457 | } | |
458 | ||
459 | static int cdc_ncm_eth_hlen(struct usbnet *dev) | |
460 | { | |
461 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
462 | return 0; | |
463 | return ETH_HLEN; | |
464 | } | |
465 | ||
466 | static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) | |
467 | { | |
468 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
469 | return CDC_MBIM_MIN_DATAGRAM_SIZE; | |
470 | return CDC_NCM_MIN_DATAGRAM_SIZE; | |
471 | } | |
472 | ||
473 | static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) | |
474 | { | |
475 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
476 | ||
477 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) | |
478 | return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
479 | if (ctx->ether_desc) | |
480 | return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
481 | return CDC_NCM_MAX_DATAGRAM_SIZE; | |
482 | } | |
483 | ||
484 | /* initial one-time device setup. MUST be called with the data interface | |
485 | * in altsetting 0 | |
486 | */ | |
487 | static int cdc_ncm_init(struct usbnet *dev) | |
488 | { | |
489 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
490 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
491 | int err; | |
900d495a | 492 | |
90b8b037 ML |
493 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
494 | USB_TYPE_CLASS | USB_DIR_IN | |
495 | |USB_RECIP_INTERFACE, | |
ff0992e9 BM |
496 | 0, iface_no, &ctx->ncm_parm, |
497 | sizeof(ctx->ncm_parm)); | |
36c35416 | 498 | if (err < 0) { |
59ede316 BM |
499 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
500 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
501 | } |
502 | ||
f8afb73d BM |
503 | /* set CRC Mode */ |
504 | if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { | |
505 | dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); | |
506 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, | |
507 | USB_TYPE_CLASS | USB_DIR_OUT | |
508 | | USB_RECIP_INTERFACE, | |
509 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
510 | iface_no, NULL, 0); | |
511 | if (err < 0) | |
512 | dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); | |
513 | } | |
514 | ||
515 | /* set NTB format, if both formats are supported. | |
516 | * | |
517 | * "The host shall only send this command while the NCM Data | |
518 | * Interface is in alternate setting 0." | |
519 | */ | |
d22adbfb DC |
520 | if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & |
521 | USB_CDC_NCM_NTB32_SUPPORTED) { | |
f8afb73d BM |
522 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); |
523 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
524 | USB_TYPE_CLASS | USB_DIR_OUT | |
525 | | USB_RECIP_INTERFACE, | |
526 | USB_CDC_NCM_NTB16_FORMAT, | |
527 | iface_no, NULL, 0); | |
528 | if (err < 0) | |
529 | dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); | |
530 | } | |
531 | ||
532 | /* set initial device values */ | |
ff0992e9 BM |
533 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); |
534 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
535 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
536 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
537 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b | 538 | /* devices prior to NCM Errata shall set this field to zero */ |
ff0992e9 | 539 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); |
47175e5f | 540 | |
ae223cd4 BM |
541 | dev_dbg(&dev->intf->dev, |
542 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
543 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
f8afb73d | 544 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); |
900d495a | 545 | |
84e77a8b AO |
546 | /* max count of tx datagrams */ |
547 | if ((ctx->tx_max_datagrams == 0) || | |
548 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
549 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a | 550 | |
70559b89 BM |
551 | /* set up maximum NDP size */ |
552 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); | |
553 | ||
6c4e548f BM |
554 | /* initial coalescing timer interval */ |
555 | ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; | |
556 | ||
f8afb73d BM |
557 | return 0; |
558 | } | |
559 | ||
560 | /* set a new max datagram size */ | |
561 | static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) | |
562 | { | |
563 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
564 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
565 | __le16 max_datagram_size; | |
566 | u16 mbim_mtu; | |
567 | int err; | |
568 | ||
569 | /* set default based on descriptors */ | |
570 | ctx->max_datagram_size = clamp_t(u32, new_size, | |
571 | cdc_ncm_min_dgram_size(dev), | |
572 | CDC_NCM_MAX_DATAGRAM_SIZE); | |
573 | ||
574 | /* inform the device about the selected Max Datagram Size? */ | |
575 | if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
576 | goto out; | |
577 | ||
578 | /* read current mtu value from device */ | |
579 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
580 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
581 | 0, iface_no, &max_datagram_size, 2); | |
582 | if (err < 0) { | |
583 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); | |
584 | goto out; | |
585 | } | |
586 | ||
587 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) | |
588 | goto out; | |
589 | ||
590 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
591 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
592 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
593 | 0, iface_no, &max_datagram_size, 2); | |
594 | if (err < 0) | |
595 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
596 | ||
597 | out: | |
598 | /* set MTU to max supported by the device if necessary */ | |
599 | dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); | |
600 | ||
601 | /* do not exceed operater preferred MTU */ | |
602 | if (ctx->mbim_extended_desc) { | |
603 | mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); | |
604 | if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) | |
605 | dev->net->mtu = mbim_mtu; | |
606 | } | |
607 | } | |
608 | ||
609 | static void cdc_ncm_fix_modulus(struct usbnet *dev) | |
610 | { | |
611 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
612 | u32 val; | |
900d495a AO |
613 | |
614 | /* | |
615 | * verify that the structure alignment is: | |
616 | * - power of two | |
617 | * - not greater than the maximum transmit length | |
618 | * - not less than four bytes | |
619 | */ | |
620 | val = ctx->tx_ndp_modulus; | |
621 | ||
622 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
623 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 624 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
625 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
626 | } | |
627 | ||
628 | /* | |
629 | * verify that the payload alignment is: | |
630 | * - power of two | |
631 | * - not greater than the maximum transmit length | |
632 | * - not less than four bytes | |
633 | */ | |
634 | val = ctx->tx_modulus; | |
635 | ||
636 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
637 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 638 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
639 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
640 | } | |
641 | ||
642 | /* verify the payload remainder */ | |
643 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 644 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
645 | ctx->tx_remainder = 0; |
646 | } | |
647 | ||
648 | /* adjust TX-remainder according to NCM specification. */ | |
f8afb73d | 649 | ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & |
2d1c4310 | 650 | (ctx->tx_modulus - 1)); |
f8afb73d | 651 | } |
900d495a | 652 | |
f8afb73d BM |
653 | static int cdc_ncm_setup(struct usbnet *dev) |
654 | { | |
655 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
50f1cb1c BM |
656 | u32 def_rx, def_tx; |
657 | ||
658 | /* be conservative when selecting intial buffer size to | |
659 | * increase the number of hosts this will work for | |
660 | */ | |
661 | def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, | |
662 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
663 | def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, | |
664 | le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
900d495a | 665 | |
f8afb73d | 666 | /* clamp rx_max and tx_max and inform device */ |
50f1cb1c | 667 | cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); |
259fef03 | 668 | |
f8afb73d BM |
669 | /* sanitize the modulus and remainder values */ |
670 | cdc_ncm_fix_modulus(dev); | |
259fef03 | 671 | |
f8afb73d BM |
672 | /* set max datagram size */ |
673 | cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); | |
900d495a AO |
674 | return 0; |
675 | } | |
676 | ||
677 | static void | |
ff1632aa | 678 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 679 | { |
ff1632aa | 680 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
681 | u8 ep; |
682 | ||
683 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
684 | ||
685 | e = intf->cur_altsetting->endpoint + ep; | |
686 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
687 | case USB_ENDPOINT_XFER_INT: | |
688 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
689 | if (!dev->status) |
690 | dev->status = e; | |
900d495a AO |
691 | } |
692 | break; | |
693 | ||
694 | case USB_ENDPOINT_XFER_BULK: | |
695 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
696 | if (!in) |
697 | in = e; | |
900d495a | 698 | } else { |
ff1632aa BM |
699 | if (!out) |
700 | out = e; | |
900d495a AO |
701 | } |
702 | break; | |
703 | ||
704 | default: | |
705 | break; | |
706 | } | |
707 | } | |
ff1632aa BM |
708 | if (in && !dev->in) |
709 | dev->in = usb_rcvbulkpipe(dev->udev, | |
710 | in->desc.bEndpointAddress & | |
711 | USB_ENDPOINT_NUMBER_MASK); | |
712 | if (out && !dev->out) | |
713 | dev->out = usb_sndbulkpipe(dev->udev, | |
714 | out->desc.bEndpointAddress & | |
715 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
716 | } |
717 | ||
718 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
719 | { | |
720 | if (ctx == NULL) | |
721 | return; | |
722 | ||
900d495a AO |
723 | if (ctx->tx_rem_skb != NULL) { |
724 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
725 | ctx->tx_rem_skb = NULL; | |
726 | } | |
727 | ||
728 | if (ctx->tx_curr_skb != NULL) { | |
729 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
730 | ctx->tx_curr_skb = NULL; | |
731 | } | |
732 | ||
4a0e3e98 EM |
733 | kfree(ctx->delayed_ndp16); |
734 | ||
900d495a AO |
735 | kfree(ctx); |
736 | } | |
737 | ||
1dfddff5 BM |
738 | /* we need to override the usbnet change_mtu ndo for two reasons: |
739 | * - respect the negotiated maximum datagram size | |
740 | * - avoid unwanted changes to rx and tx buffers | |
741 | */ | |
742 | int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) | |
743 | { | |
744 | struct usbnet *dev = netdev_priv(net); | |
05a56487 | 745 | |
1dfddff5 | 746 | net->mtu = new_mtu; |
05a56487 RR |
747 | cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); |
748 | ||
1dfddff5 BM |
749 | return 0; |
750 | } | |
751 | EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); | |
752 | ||
753 | static const struct net_device_ops cdc_ncm_netdev_ops = { | |
754 | .ndo_open = usbnet_open, | |
755 | .ndo_stop = usbnet_stop, | |
756 | .ndo_start_xmit = usbnet_start_xmit, | |
757 | .ndo_tx_timeout = usbnet_tx_timeout, | |
c8b5d129 | 758 | .ndo_get_stats64 = usbnet_get_stats64, |
1dfddff5 BM |
759 | .ndo_change_mtu = cdc_ncm_change_mtu, |
760 | .ndo_set_mac_address = eth_mac_addr, | |
761 | .ndo_validate_addr = eth_validate_addr, | |
762 | }; | |
763 | ||
4a0e3e98 | 764 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) |
900d495a AO |
765 | { |
766 | struct cdc_ncm_ctx *ctx; | |
767 | struct usb_driver *driver; | |
768 | u8 *buf; | |
769 | int len; | |
770 | int temp; | |
2b02c20c | 771 | int err; |
900d495a | 772 | u8 iface_no; |
77b0a099 | 773 | struct usb_cdc_parsed_header hdr; |
2b02c20c | 774 | u16 curr_ntb_format; |
900d495a | 775 | |
c796984f | 776 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
777 | if (!ctx) |
778 | return -ENOMEM; | |
900d495a | 779 | |
c84ff1d6 AO |
780 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
781 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
bed6f762 | 782 | ctx->bh.data = (unsigned long)dev; |
c84ff1d6 AO |
783 | ctx->bh.func = cdc_ncm_txpath_bh; |
784 | atomic_set(&ctx->stop, 0); | |
900d495a | 785 | spin_lock_init(&ctx->mtx); |
900d495a AO |
786 | |
787 | /* store ctx pointer in device data field */ | |
788 | dev->data[0] = (unsigned long)ctx; | |
789 | ||
9fe0234c BM |
790 | /* only the control interface can be successfully probed */ |
791 | ctx->control = intf; | |
792 | ||
900d495a AO |
793 | /* get some pointers */ |
794 | driver = driver_of(intf); | |
795 | buf = intf->cur_altsetting->extra; | |
796 | len = intf->cur_altsetting->extralen; | |
797 | ||
900d495a | 798 | /* parse through descriptors associated with control interface */ |
77b0a099 ON |
799 | cdc_parse_cdc_header(&hdr, intf, buf, len); |
800 | ||
6527f833 BM |
801 | if (hdr.usb_cdc_union_desc) |
802 | ctx->data = usb_ifnum_to_if(dev->udev, | |
803 | hdr.usb_cdc_union_desc->bSlaveInterface0); | |
77b0a099 ON |
804 | ctx->ether_desc = hdr.usb_cdc_ether_desc; |
805 | ctx->func_desc = hdr.usb_cdc_ncm_desc; | |
806 | ctx->mbim_desc = hdr.usb_cdc_mbim_desc; | |
807 | ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; | |
900d495a | 808 | |
9992c2e2 | 809 | /* some buggy devices have an IAD but no CDC Union */ |
6527f833 | 810 | if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
811 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
812 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
813 | } |
814 | ||
900d495a | 815 | /* check if we got everything */ |
f8afb73d BM |
816 | if (!ctx->data) { |
817 | dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); | |
900d495a | 818 | goto error; |
296e81f8 | 819 | } |
f8afb73d BM |
820 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { |
821 | if (!ctx->mbim_desc) { | |
822 | dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); | |
823 | goto error; | |
824 | } | |
825 | } else { | |
826 | if (!ctx->ether_desc || !ctx->func_desc) { | |
827 | dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); | |
828 | goto error; | |
829 | } | |
830 | } | |
900d495a | 831 | |
bbc8d922 BM |
832 | /* claim data interface, if different from control */ |
833 | if (ctx->data != ctx->control) { | |
834 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 BM |
835 | if (temp) { |
836 | dev_dbg(&intf->dev, "failed to claim data intf\n"); | |
bbc8d922 | 837 | goto error; |
296e81f8 | 838 | } |
bbc8d922 | 839 | } |
900d495a AO |
840 | |
841 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
842 | ||
7b8076ce DP |
843 | /* Device-specific flags */ |
844 | ctx->drvflags = drvflags; | |
845 | ||
48906f62 BM |
846 | /* Reset data interface. Some devices will not reset properly |
847 | * unless they are configured first. Toggle the altsetting to | |
7b8076ce DP |
848 | * force a reset. |
849 | * Some other devices do not work properly with this procedure | |
850 | * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE | |
48906f62 | 851 | */ |
7b8076ce DP |
852 | if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) |
853 | usb_set_interface(dev->udev, iface_no, data_altsetting); | |
854 | ||
900d495a | 855 | temp = usb_set_interface(dev->udev, iface_no, 0); |
296e81f8 BM |
856 | if (temp) { |
857 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 858 | goto error2; |
296e81f8 | 859 | } |
900d495a | 860 | |
08c74fc9 BM |
861 | /* initialize basic device settings */ |
862 | if (cdc_ncm_init(dev)) | |
ff0992e9 BM |
863 | goto error2; |
864 | ||
c086e709 BM |
865 | /* Some firmwares need a pause here or they will silently fail |
866 | * to set up the interface properly. This value was decided | |
867 | * empirically on a Sierra Wireless MC7455 running 02.08.02.00 | |
868 | * firmware. | |
869 | */ | |
870 | usleep_range(10000, 20000); | |
871 | ||
900d495a | 872 | /* configure data interface */ |
38396e4c | 873 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
874 | if (temp) { |
875 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 876 | goto error2; |
296e81f8 | 877 | } |
900d495a | 878 | |
2b02c20c EM |
879 | /* |
880 | * Some Huawei devices have been observed to come out of reset in NDP32 mode. | |
881 | * Let's check if this is the case, and set the device to NDP16 mode again if | |
882 | * needed. | |
883 | */ | |
884 | if (ctx->drvflags & CDC_NCM_FLAG_RESET_NTB16) { | |
885 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_FORMAT, | |
886 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
887 | 0, iface_no, &curr_ntb_format, 2); | |
888 | if (err < 0) { | |
889 | goto error2; | |
890 | } | |
891 | ||
892 | if (curr_ntb_format == USB_CDC_NCM_NTB32_FORMAT) { | |
893 | dev_info(&intf->dev, "resetting NTB format to 16-bit"); | |
894 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
895 | USB_TYPE_CLASS | USB_DIR_OUT | |
896 | | USB_RECIP_INTERFACE, | |
897 | USB_CDC_NCM_NTB16_FORMAT, | |
898 | iface_no, NULL, 0); | |
899 | ||
900 | if (err < 0) | |
901 | goto error2; | |
902 | } | |
903 | } | |
904 | ||
ff1632aa BM |
905 | cdc_ncm_find_endpoints(dev, ctx->data); |
906 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
907 | if (!dev->in || !dev->out || !dev->status) { |
908 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 909 | goto error2; |
296e81f8 | 910 | } |
900d495a | 911 | |
900d495a AO |
912 | usb_set_intfdata(ctx->data, dev); |
913 | usb_set_intfdata(ctx->control, dev); | |
900d495a | 914 | |
38396e4c GS |
915 | if (ctx->ether_desc) { |
916 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 BM |
917 | if (temp) { |
918 | dev_dbg(&intf->dev, "failed to get mac address\n"); | |
38396e4c | 919 | goto error2; |
296e81f8 BM |
920 | } |
921 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 922 | } |
900d495a | 923 | |
08c74fc9 BM |
924 | /* finish setting up the device specific data */ |
925 | cdc_ncm_setup(dev); | |
ff0992e9 | 926 | |
4a0e3e98 EM |
927 | /* Allocate the delayed NDP if needed. */ |
928 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
929 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
930 | if (!ctx->delayed_ndp16) | |
931 | goto error2; | |
932 | dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); | |
933 | } | |
934 | ||
6c4e548f BM |
935 | /* override ethtool_ops */ |
936 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
937 | ||
289507d3 BM |
938 | /* add our sysfs attrs */ |
939 | dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; | |
940 | ||
1dfddff5 BM |
941 | /* must handle MTU changes */ |
942 | dev->net->netdev_ops = &cdc_ncm_netdev_ops; | |
f77f0aee | 943 | dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); |
1dfddff5 | 944 | |
900d495a AO |
945 | return 0; |
946 | ||
19694ac8 AO |
947 | error2: |
948 | usb_set_intfdata(ctx->control, NULL); | |
949 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
950 | if (ctx->data != ctx->control) |
951 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
952 | error: |
953 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
954 | dev->data[0] = 0; | |
296e81f8 | 955 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
956 | return -ENODEV; |
957 | } | |
c91ce3b6 | 958 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 959 | |
c91ce3b6 | 960 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
961 | { |
962 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 963 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
964 | |
965 | if (ctx == NULL) | |
966 | return; /* no setup */ | |
967 | ||
c84ff1d6 AO |
968 | atomic_set(&ctx->stop, 1); |
969 | ||
970 | if (hrtimer_active(&ctx->tx_timer)) | |
971 | hrtimer_cancel(&ctx->tx_timer); | |
972 | ||
973 | tasklet_kill(&ctx->bh); | |
974 | ||
bbc8d922 BM |
975 | /* handle devices with combined control and data interface */ |
976 | if (ctx->control == ctx->data) | |
977 | ctx->data = NULL; | |
978 | ||
19694ac8 AO |
979 | /* disconnect master --> disconnect slave */ |
980 | if (intf == ctx->control && ctx->data) { | |
981 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 982 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 983 | ctx->data = NULL; |
900d495a | 984 | |
19694ac8 AO |
985 | } else if (intf == ctx->data && ctx->control) { |
986 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 987 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 988 | ctx->control = NULL; |
900d495a AO |
989 | } |
990 | ||
3e515665 | 991 | usb_set_intfdata(intf, NULL); |
900d495a AO |
992 | cdc_ncm_free(ctx); |
993 | } | |
c91ce3b6 | 994 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 995 | |
50a0ffaf BM |
996 | /* Return the number of the MBIM control interface altsetting iff it |
997 | * is preferred and available, | |
1e8bbe6c | 998 | */ |
50a0ffaf | 999 | u8 cdc_ncm_select_altsetting(struct usb_interface *intf) |
38396e4c | 1000 | { |
1e8bbe6c | 1001 | struct usb_host_interface *alt; |
38396e4c | 1002 | |
bd329e12 BM |
1003 | /* The MBIM spec defines a NCM compatible default altsetting, |
1004 | * which we may have matched: | |
1005 | * | |
1006 | * "Functions that implement both NCM 1.0 and MBIM (an | |
1007 | * “NCM/MBIM function”) according to this recommendation | |
1008 | * shall provide two alternate settings for the | |
1009 | * Communication Interface. Alternate setting 0, and the | |
1010 | * associated class and endpoint descriptors, shall be | |
1011 | * constructed according to the rules given for the | |
1012 | * Communication Interface in section 5 of [USBNCM10]. | |
1013 | * Alternate setting 1, and the associated class and | |
1014 | * endpoint descriptors, shall be constructed according to | |
1015 | * the rules given in section 6 (USB Device Model) of this | |
1016 | * specification." | |
bd329e12 | 1017 | */ |
50a0ffaf BM |
1018 | if (intf->num_altsetting < 2) |
1019 | return intf->cur_altsetting->desc.bAlternateSetting; | |
1020 | ||
1021 | if (prefer_mbim) { | |
1e8bbe6c | 1022 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); |
50a0ffaf BM |
1023 | if (alt && cdc_ncm_comm_intf_is_mbim(alt)) |
1024 | return CDC_NCM_COMM_ALTSETTING_MBIM; | |
f350ca03 | 1025 | } |
50a0ffaf | 1026 | return CDC_NCM_COMM_ALTSETTING_NCM; |
1e8bbe6c BM |
1027 | } |
1028 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
1029 | ||
1030 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
1031 | { | |
1e8bbe6c | 1032 | /* MBIM backwards compatible function? */ |
50a0ffaf | 1033 | if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) |
1e8bbe6c | 1034 | return -ENODEV; |
bd329e12 | 1035 | |
4a0e3e98 EM |
1036 | /* The NCM data altsetting is fixed, so we hard-coded it. |
1037 | * Additionally, generic NCM devices are assumed to accept arbitrarily | |
1038 | * placed NDP. | |
1039 | */ | |
4d06dd53 | 1040 | return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); |
38396e4c GS |
1041 | } |
1042 | ||
c78b7c58 | 1043 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 1044 | { |
c78b7c58 BM |
1045 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
1046 | ||
1047 | if (skb->len + align > max) | |
1048 | align = max - skb->len; | |
1049 | if (align && skb_tailroom(skb) >= align) | |
b080db58 | 1050 | skb_put_zero(skb, align); |
c78b7c58 BM |
1051 | } |
1052 | ||
1053 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
1054 | * allocating a new one within skb | |
1055 | */ | |
1056 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) | |
1057 | { | |
1058 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
1059 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
1060 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
1061 | ||
4a0e3e98 EM |
1062 | /* If NDP should be moved to the end of the NCM package, we can't follow the |
1063 | * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and | |
1064 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1065 | */ | |
f8c0cfa5 | 1066 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { |
4a0e3e98 EM |
1067 | if (ctx->delayed_ndp16->dwSignature == sign) |
1068 | return ctx->delayed_ndp16; | |
1069 | ||
f8c0cfa5 BM |
1070 | /* We can only push a single NDP to the end. Return |
1071 | * NULL to send what we've already got and queue this | |
1072 | * skb for later. | |
1073 | */ | |
1074 | else if (ctx->delayed_ndp16->dwSignature) | |
1075 | return NULL; | |
1076 | } | |
1077 | ||
c78b7c58 BM |
1078 | /* follow the chain of NDPs, looking for a match */ |
1079 | while (ndpoffset) { | |
1080 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
1081 | if (ndp16->dwSignature == sign) | |
1082 | return ndp16; | |
1083 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1084 | } | |
1085 | ||
1086 | /* align new NDP */ | |
4a0e3e98 | 1087 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
e1069bbf | 1088 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); |
c78b7c58 BM |
1089 | |
1090 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
e1069bbf | 1091 | if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) |
c78b7c58 BM |
1092 | return NULL; |
1093 | ||
1094 | /* link to it */ | |
1095 | if (ndp16) | |
1096 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
1097 | else | |
1098 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
1099 | ||
1100 | /* push a new empty NDP */ | |
4a0e3e98 | 1101 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
ad941e69 | 1102 | ndp16 = skb_put_zero(skb, ctx->max_ndp_size); |
4a0e3e98 EM |
1103 | else |
1104 | ndp16 = ctx->delayed_ndp16; | |
1105 | ||
c78b7c58 BM |
1106 | ndp16->dwSignature = sign; |
1107 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
1108 | return ndp16; | |
900d495a AO |
1109 | } |
1110 | ||
c91ce3b6 | 1111 | struct sk_buff * |
bed6f762 | 1112 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 1113 | { |
bed6f762 | 1114 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
c78b7c58 BM |
1115 | struct usb_cdc_ncm_nth16 *nth16; |
1116 | struct usb_cdc_ncm_ndp16 *ndp16; | |
900d495a | 1117 | struct sk_buff *skb_out; |
c78b7c58 | 1118 | u16 n = 0, index, ndplen; |
84e77a8b | 1119 | u8 ready2send = 0; |
4a0e3e98 | 1120 | u32 delayed_ndp_size; |
aeca3a77 | 1121 | size_t padding_count; |
4a0e3e98 EM |
1122 | |
1123 | /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated | |
1124 | * accordingly. Otherwise, we should check here. | |
1125 | */ | |
1126 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) | |
1127 | delayed_ndp_size = ctx->max_ndp_size; | |
1128 | else | |
1129 | delayed_ndp_size = 0; | |
900d495a AO |
1130 | |
1131 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 1132 | if (skb != NULL) { |
900d495a | 1133 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
1134 | swap(sign, ctx->tx_rem_sign); |
1135 | } else { | |
84e77a8b | 1136 | ready2send = 1; |
c78b7c58 | 1137 | } |
900d495a AO |
1138 | |
1139 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 1140 | skb_out = ctx->tx_curr_skb; |
900d495a | 1141 | |
c78b7c58 BM |
1142 | /* allocate a new OUT skb */ |
1143 | if (!skb_out) { | |
e1069bbf JB |
1144 | if (ctx->tx_low_mem_val == 0) { |
1145 | ctx->tx_curr_size = ctx->tx_max; | |
1146 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1147 | /* If the memory allocation fails we will wait longer | |
1148 | * each time before attempting another full size | |
1149 | * allocation again to not overload the system | |
1150 | * further. | |
1151 | */ | |
1152 | if (skb_out == NULL) { | |
1153 | ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1, | |
1154 | (unsigned)CDC_NCM_LOW_MEM_MAX_CNT); | |
1155 | ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt; | |
1156 | } | |
1157 | } | |
900d495a | 1158 | if (skb_out == NULL) { |
e1069bbf JB |
1159 | /* See if a very small allocation is possible. |
1160 | * We will send this packet immediately and hope | |
1161 | * that there is more memory available later. | |
1162 | */ | |
1163 | if (skb) | |
1164 | ctx->tx_curr_size = max(skb->len, | |
1165 | (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE); | |
1166 | else | |
1167 | ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE; | |
1168 | skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); | |
1169 | ||
1170 | /* No allocation possible so we will abort */ | |
1171 | if (skb_out == NULL) { | |
1172 | if (skb != NULL) { | |
1173 | dev_kfree_skb_any(skb); | |
1174 | dev->net->stats.tx_dropped++; | |
1175 | } | |
1176 | goto exit_no_skb; | |
900d495a | 1177 | } |
e1069bbf | 1178 | ctx->tx_low_mem_val--; |
900d495a | 1179 | } |
c78b7c58 | 1180 | /* fill out the initial 16-bit NTB header */ |
ad941e69 | 1181 | nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16)); |
c78b7c58 BM |
1182 | nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); |
1183 | nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
1184 | nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
900d495a | 1185 | |
c78b7c58 | 1186 | /* count total number of frames in this NTB */ |
900d495a | 1187 | ctx->tx_curr_frame_num = 0; |
beeecd42 BM |
1188 | |
1189 | /* recent payload counter for this skb_out */ | |
1190 | ctx->tx_curr_frame_payload = 0; | |
900d495a AO |
1191 | } |
1192 | ||
c78b7c58 BM |
1193 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
1194 | /* send any remaining skb first */ | |
900d495a AO |
1195 | if (skb == NULL) { |
1196 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 1197 | sign = ctx->tx_rem_sign; |
900d495a AO |
1198 | ctx->tx_rem_skb = NULL; |
1199 | ||
1200 | /* check for end of skb */ | |
1201 | if (skb == NULL) | |
1202 | break; | |
1203 | } | |
1204 | ||
c78b7c58 BM |
1205 | /* get the appropriate NDP for this skb */ |
1206 | ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
1207 | ||
1208 | /* align beginning of next frame */ | |
e1069bbf | 1209 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size); |
c78b7c58 BM |
1210 | |
1211 | /* check if we had enough room left for both NDP and frame */ | |
e1069bbf | 1212 | if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) { |
900d495a AO |
1213 | if (n == 0) { |
1214 | /* won't fit, MTU problem? */ | |
1215 | dev_kfree_skb_any(skb); | |
1216 | skb = NULL; | |
bed6f762 | 1217 | dev->net->stats.tx_dropped++; |
900d495a AO |
1218 | } else { |
1219 | /* no room for skb - store for later */ | |
1220 | if (ctx->tx_rem_skb != NULL) { | |
1221 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 1222 | dev->net->stats.tx_dropped++; |
900d495a AO |
1223 | } |
1224 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 1225 | ctx->tx_rem_sign = sign; |
900d495a | 1226 | skb = NULL; |
84e77a8b | 1227 | ready2send = 1; |
beeecd42 | 1228 | ctx->tx_reason_ntb_full++; /* count reason for transmitting */ |
900d495a AO |
1229 | } |
1230 | break; | |
1231 | } | |
1232 | ||
c78b7c58 BM |
1233 | /* calculate frame number withing this NDP */ |
1234 | ndplen = le16_to_cpu(ndp16->wLength); | |
1235 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
900d495a | 1236 | |
c78b7c58 BM |
1237 | /* OK, add this skb */ |
1238 | ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
1239 | ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
1240 | ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
59ae1d12 | 1241 | skb_put_data(skb_out, skb->data, skb->len); |
beeecd42 | 1242 | ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ |
900d495a AO |
1243 | dev_kfree_skb_any(skb); |
1244 | skb = NULL; | |
c78b7c58 BM |
1245 | |
1246 | /* send now if this NDP is full */ | |
1247 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
1248 | ready2send = 1; | |
beeecd42 | 1249 | ctx->tx_reason_ndp_full++; /* count reason for transmitting */ |
c78b7c58 BM |
1250 | break; |
1251 | } | |
900d495a AO |
1252 | } |
1253 | ||
1254 | /* free up any dangling skb */ | |
1255 | if (skb != NULL) { | |
1256 | dev_kfree_skb_any(skb); | |
1257 | skb = NULL; | |
bed6f762 | 1258 | dev->net->stats.tx_dropped++; |
900d495a AO |
1259 | } |
1260 | ||
1261 | ctx->tx_curr_frame_num = n; | |
1262 | ||
1263 | if (n == 0) { | |
1264 | /* wait for more frames */ | |
1265 | /* push variables */ | |
1266 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1267 | goto exit_no_skb; |
1268 | ||
6c4e548f | 1269 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { |
900d495a AO |
1270 | /* wait for more frames */ |
1271 | /* push variables */ | |
1272 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1273 | /* set the pending count */ |
1274 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 1275 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
1276 | goto exit_no_skb; |
1277 | ||
1278 | } else { | |
beeecd42 BM |
1279 | if (n == ctx->tx_max_datagrams) |
1280 | ctx->tx_reason_max_datagram++; /* count reason for transmitting */ | |
900d495a AO |
1281 | /* frame goes out */ |
1282 | /* variables will be reset at next call */ | |
1283 | } | |
1284 | ||
4a0e3e98 EM |
1285 | /* If requested, put NDP at end of frame. */ |
1286 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
1287 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
e1069bbf | 1288 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); |
4a0e3e98 | 1289 | nth16->wNdpIndex = cpu_to_le16(skb_out->len); |
59ae1d12 | 1290 | skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size); |
4a0e3e98 EM |
1291 | |
1292 | /* Zero out delayed NDP - signature checking will naturally fail. */ | |
1293 | ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); | |
1294 | } | |
1295 | ||
43e4c6df | 1296 | /* If collected data size is less or equal ctx->min_tx_pkt |
20572226 BM |
1297 | * bytes, we send buffers as it is. If we get more data, it |
1298 | * would be more efficient for USB HS mobile device with DMA | |
1299 | * engine to receive a full size NTB, than canceling DMA | |
1300 | * transfer and receiving a short packet. | |
4d619f62 BM |
1301 | * |
1302 | * This optimization support is pointless if we end up sending | |
1303 | * a ZLP after full sized NTBs. | |
900d495a | 1304 | */ |
4d619f62 | 1305 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
aeca3a77 | 1306 | skb_out->len > ctx->min_tx_pkt) { |
e1069bbf | 1307 | padding_count = ctx->tx_curr_size - skb_out->len; |
b080db58 | 1308 | skb_put_zero(skb_out, padding_count); |
e1069bbf | 1309 | } else if (skb_out->len < ctx->tx_curr_size && |
aeca3a77 | 1310 | (skb_out->len % dev->maxpacket) == 0) { |
634fef61 | 1311 | skb_put_u8(skb_out, 0); /* force short packet */ |
aeca3a77 | 1312 | } |
900d495a | 1313 | |
c78b7c58 BM |
1314 | /* set final frame length */ |
1315 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1316 | nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
900d495a AO |
1317 | |
1318 | /* return skb */ | |
1319 | ctx->tx_curr_skb = NULL; | |
beeecd42 BM |
1320 | |
1321 | /* keep private stats: framing overhead and number of NTBs */ | |
1322 | ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; | |
1323 | ctx->tx_ntbs++; | |
1324 | ||
7a1e890e | 1325 | /* usbnet will count all the framing overhead by default. |
beeecd42 BM |
1326 | * Adjust the stats so that the tx_bytes counter show real |
1327 | * payload data instead. | |
1328 | */ | |
7a1e890e | 1329 | usbnet_set_skb_tx_stats(skb_out, n, |
44f6731d | 1330 | (long)ctx->tx_curr_frame_payload - skb_out->len); |
1e9e39f4 | 1331 | |
900d495a AO |
1332 | return skb_out; |
1333 | ||
1334 | exit_no_skb: | |
046c6594 BM |
1335 | /* Start timer, if there is a remaining non-empty skb */ |
1336 | if (ctx->tx_curr_skb != NULL && n > 0) | |
c84ff1d6 | 1337 | cdc_ncm_tx_timeout_start(ctx); |
900d495a AO |
1338 | return NULL; |
1339 | } | |
c91ce3b6 | 1340 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
1341 | |
1342 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
1343 | { | |
1344 | /* start timer, if not already started */ | |
c84ff1d6 AO |
1345 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
1346 | hrtimer_start(&ctx->tx_timer, | |
8b0e1953 | 1347 | ctx->timer_interval, |
c84ff1d6 | 1348 | HRTIMER_MODE_REL); |
900d495a AO |
1349 | } |
1350 | ||
c84ff1d6 | 1351 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 1352 | { |
c84ff1d6 AO |
1353 | struct cdc_ncm_ctx *ctx = |
1354 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 1355 | |
c84ff1d6 AO |
1356 | if (!atomic_read(&ctx->stop)) |
1357 | tasklet_schedule(&ctx->bh); | |
1358 | return HRTIMER_NORESTART; | |
1359 | } | |
900d495a | 1360 | |
c84ff1d6 AO |
1361 | static void cdc_ncm_txpath_bh(unsigned long param) |
1362 | { | |
bed6f762 BM |
1363 | struct usbnet *dev = (struct usbnet *)param; |
1364 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a | 1365 | |
c84ff1d6 AO |
1366 | spin_lock_bh(&ctx->mtx); |
1367 | if (ctx->tx_timer_pending != 0) { | |
1368 | ctx->tx_timer_pending--; | |
900d495a | 1369 | cdc_ncm_tx_timeout_start(ctx); |
c84ff1d6 | 1370 | spin_unlock_bh(&ctx->mtx); |
bed6f762 | 1371 | } else if (dev->net != NULL) { |
beeecd42 | 1372 | ctx->tx_reason_timeout++; /* count reason for transmitting */ |
c84ff1d6 | 1373 | spin_unlock_bh(&ctx->mtx); |
bed6f762 BM |
1374 | netif_tx_lock_bh(dev->net); |
1375 | usbnet_start_xmit(NULL, dev->net); | |
1376 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba BM |
1377 | } else { |
1378 | spin_unlock_bh(&ctx->mtx); | |
f742aa8a | 1379 | } |
900d495a AO |
1380 | } |
1381 | ||
2f69702c | 1382 | struct sk_buff * |
900d495a AO |
1383 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
1384 | { | |
1385 | struct sk_buff *skb_out; | |
1386 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
1387 | |
1388 | /* | |
1389 | * The Ethernet API we are using does not support transmitting | |
1390 | * multiple Ethernet frames in a single call. This driver will | |
1391 | * accumulate multiple Ethernet frames and send out a larger | |
1392 | * USB frame when the USB buffer is full or when a single jiffies | |
1393 | * timeout happens. | |
1394 | */ | |
1395 | if (ctx == NULL) | |
1396 | goto error; | |
1397 | ||
c84ff1d6 | 1398 | spin_lock_bh(&ctx->mtx); |
bed6f762 | 1399 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); |
c84ff1d6 | 1400 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
1401 | return skb_out; |
1402 | ||
1403 | error: | |
1404 | if (skb != NULL) | |
1405 | dev_kfree_skb_any(skb); | |
1406 | ||
1407 | return NULL; | |
1408 | } | |
2f69702c | 1409 | EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); |
900d495a | 1410 | |
ff06ab13 | 1411 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 1412 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 1413 | { |
ae223cd4 | 1414 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 1415 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
1416 | int len; |
1417 | int ret = -EINVAL; | |
900d495a | 1418 | |
900d495a AO |
1419 | if (ctx == NULL) |
1420 | goto error; | |
1421 | ||
d5ddb4a5 AO |
1422 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
1423 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 1424 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
1425 | goto error; |
1426 | } | |
1427 | ||
d5ddb4a5 | 1428 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 1429 | |
986e10d6 | 1430 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
1431 | netif_dbg(dev, rx_err, dev->net, |
1432 | "invalid NTH16 signature <%#010x>\n", | |
1433 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
1434 | goto error; |
1435 | } | |
1436 | ||
d5ddb4a5 AO |
1437 | len = le16_to_cpu(nth16->wBlockLength); |
1438 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
1439 | netif_dbg(dev, rx_err, dev->net, |
1440 | "unsupported NTB block length %u/%u\n", len, | |
1441 | ctx->rx_max); | |
900d495a AO |
1442 | goto error; |
1443 | } | |
1444 | ||
d5ddb4a5 | 1445 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
1446 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
1447 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
1448 | netif_dbg(dev, rx_err, dev->net, | |
1449 | "sequence number glitch prev=%d curr=%d\n", | |
1450 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
1451 | } |
1452 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
1453 | ||
ff06ab13 BM |
1454 | ret = le16_to_cpu(nth16->wNdpIndex); |
1455 | error: | |
1456 | return ret; | |
1457 | } | |
c91ce3b6 | 1458 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 BM |
1459 | |
1460 | /* verify NDP header and return number of datagrams, or negative error */ | |
c91ce3b6 | 1461 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 1462 | { |
ae223cd4 | 1463 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
1464 | struct usb_cdc_ncm_ndp16 *ndp16; |
1465 | int ret = -EINVAL; | |
1466 | ||
75d67d35 | 1467 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
1468 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
1469 | ndpoffset); | |
900d495a AO |
1470 | goto error; |
1471 | } | |
75d67d35 | 1472 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 1473 | |
d5ddb4a5 | 1474 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
1475 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
1476 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 1477 | goto error; |
900d495a AO |
1478 | } |
1479 | ||
ff06ab13 | 1480 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
1481 | sizeof(struct usb_cdc_ncm_ndp16)) / |
1482 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 1483 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 1484 | |
ae223cd4 BM |
1485 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
1486 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
1487 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 1488 | ret = -EINVAL; |
900d495a AO |
1489 | } |
1490 | ||
ff06ab13 BM |
1491 | error: |
1492 | return ret; | |
1493 | } | |
c91ce3b6 | 1494 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 | 1495 | |
2f69702c | 1496 | int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) |
ff06ab13 BM |
1497 | { |
1498 | struct sk_buff *skb; | |
1499 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1500 | int len; | |
1501 | int nframes; | |
1502 | int x; | |
1503 | int offset; | |
1504 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1505 | struct usb_cdc_ncm_dpe16 *dpe16; | |
1506 | int ndpoffset; | |
1507 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
beeecd42 | 1508 | u32 payload = 0; |
ff06ab13 BM |
1509 | |
1510 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
1511 | if (ndpoffset < 0) | |
1512 | goto error; | |
1513 | ||
1514 | next_ndp: | |
1515 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
1516 | if (nframes < 0) | |
1517 | goto error; | |
1518 | ||
1519 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); | |
1520 | ||
986e10d6 | 1521 | if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
5448d75f BM |
1522 | netif_dbg(dev, rx_err, dev->net, |
1523 | "invalid DPT16 signature <%#010x>\n", | |
1524 | le32_to_cpu(ndp16->dwSignature)); | |
ff06ab13 BM |
1525 | goto err_ndp; |
1526 | } | |
1527 | dpe16 = ndp16->dpe16; | |
900d495a | 1528 | |
d5ddb4a5 AO |
1529 | for (x = 0; x < nframes; x++, dpe16++) { |
1530 | offset = le16_to_cpu(dpe16->wDatagramIndex); | |
1531 | len = le16_to_cpu(dpe16->wDatagramLength); | |
900d495a AO |
1532 | |
1533 | /* | |
1534 | * CDC NCM ch. 3.7 | |
1535 | * All entries after first NULL entry are to be ignored | |
1536 | */ | |
d5ddb4a5 | 1537 | if ((offset == 0) || (len == 0)) { |
900d495a | 1538 | if (!x) |
75d67d35 | 1539 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1540 | break; |
1541 | } | |
1542 | ||
1543 | /* sanity checking */ | |
d5ddb4a5 AO |
1544 | if (((offset + len) > skb_in->len) || |
1545 | (len > ctx->rx_max) || (len < ETH_HLEN)) { | |
ae223cd4 BM |
1546 | netif_dbg(dev, rx_err, dev->net, |
1547 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
1548 | x, offset, len, skb_in); | |
900d495a | 1549 | if (!x) |
75d67d35 | 1550 | goto err_ndp; |
900d495a AO |
1551 | break; |
1552 | ||
1553 | } else { | |
1e2c6117 BM |
1554 | /* create a fresh copy to reduce truesize */ |
1555 | skb = netdev_alloc_skb_ip_align(dev->net, len); | |
9e56790a JJ |
1556 | if (!skb) |
1557 | goto error; | |
59ae1d12 | 1558 | skb_put_data(skb, skb_in->data + offset, len); |
900d495a | 1559 | usbnet_skb_return(dev, skb); |
beeecd42 | 1560 | payload += len; /* count payload bytes in this NTB */ |
900d495a AO |
1561 | } |
1562 | } | |
75d67d35 BM |
1563 | err_ndp: |
1564 | /* are there more NDPs to process? */ | |
1565 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1566 | if (ndpoffset && loopcount--) | |
1567 | goto next_ndp; | |
1568 | ||
beeecd42 BM |
1569 | /* update stats */ |
1570 | ctx->rx_overhead += skb_in->len - payload; | |
1571 | ctx->rx_ntbs++; | |
1572 | ||
900d495a AO |
1573 | return 1; |
1574 | error: | |
1575 | return 0; | |
1576 | } | |
2f69702c | 1577 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); |
900d495a AO |
1578 | |
1579 | static void | |
bed6f762 | 1580 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1581 | struct usb_cdc_speed_change *data) |
900d495a | 1582 | { |
84e77a8b AO |
1583 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1584 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1585 | |
1586 | /* | |
1587 | * Currently the USB-NET API does not support reporting the actual | |
1588 | * device speed. Do print it instead. | |
1589 | */ | |
f3028c52 | 1590 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { |
ae223cd4 | 1591 | netif_info(dev, link, dev->net, |
916f7640 BM |
1592 | "%u mbit/s downlink %u mbit/s uplink\n", |
1593 | (unsigned int)(rx_speed / 1000000U), | |
1594 | (unsigned int)(tx_speed / 1000000U)); | |
f3028c52 | 1595 | } else { |
ae223cd4 | 1596 | netif_info(dev, link, dev->net, |
916f7640 BM |
1597 | "%u kbit/s downlink %u kbit/s uplink\n", |
1598 | (unsigned int)(rx_speed / 1000U), | |
1599 | (unsigned int)(tx_speed / 1000U)); | |
900d495a AO |
1600 | } |
1601 | } | |
1602 | ||
1603 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1604 | { | |
1605 | struct cdc_ncm_ctx *ctx; | |
1606 | struct usb_cdc_notification *event; | |
1607 | ||
1608 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1609 | ||
1610 | if (urb->actual_length < sizeof(*event)) | |
1611 | return; | |
1612 | ||
1613 | /* test for split data in 8-byte chunks */ | |
1614 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1615 | cdc_ncm_speed_change(dev, |
84e77a8b | 1616 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1617 | return; |
1618 | } | |
1619 | ||
1620 | event = urb->transfer_buffer; | |
1621 | ||
1622 | switch (event->bNotificationType) { | |
1623 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1624 | /* | |
1625 | * According to the CDC NCM specification ch.7.1 | |
1626 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1627 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1628 | */ | |
ae223cd4 BM |
1629 | netif_info(dev, link, dev->net, |
1630 | "network connection: %sconnected\n", | |
fa83dbee BM |
1631 | !!event->wValue ? "" : "dis"); |
1632 | usbnet_link_change(dev, !!event->wValue, 0); | |
900d495a AO |
1633 | break; |
1634 | ||
1635 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1636 | if (urb->actual_length < (sizeof(*event) + |
1637 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1638 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1639 | else | |
bed6f762 BM |
1640 | cdc_ncm_speed_change(dev, |
1641 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1642 | break; |
1643 | ||
1644 | default: | |
67a36606 BM |
1645 | dev_dbg(&dev->udev->dev, |
1646 | "NCM: unexpected notification 0x%02x!\n", | |
1647 | event->bNotificationType); | |
900d495a AO |
1648 | break; |
1649 | } | |
1650 | } | |
1651 | ||
900d495a AO |
1652 | static const struct driver_info cdc_ncm_info = { |
1653 | .description = "CDC NCM", | |
4d06dd53 BM |
1654 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET |
1655 | | FLAG_LINK_INTR, | |
900d495a AO |
1656 | .bind = cdc_ncm_bind, |
1657 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1658 | .manage_power = usbnet_manage_power, |
900d495a AO |
1659 | .status = cdc_ncm_status, |
1660 | .rx_fixup = cdc_ncm_rx_fixup, | |
1661 | .tx_fixup = cdc_ncm_tx_fixup, | |
1662 | }; | |
1663 | ||
f94898ea DW |
1664 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1665 | static const struct driver_info wwan_info = { | |
1666 | .description = "Mobile Broadband Network Device", | |
1667 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1668 | | FLAG_LINK_INTR | FLAG_WWAN, |
f94898ea DW |
1669 | .bind = cdc_ncm_bind, |
1670 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1671 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1672 | .status = cdc_ncm_status, |
1673 | .rx_fixup = cdc_ncm_rx_fixup, | |
1674 | .tx_fixup = cdc_ncm_tx_fixup, | |
1675 | }; | |
1676 | ||
2f62d5aa WS |
1677 | /* Same as wwan_info, but with FLAG_NOARP */ |
1678 | static const struct driver_info wwan_noarp_info = { | |
1679 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1680 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1681 | | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, |
2f62d5aa WS |
1682 | .bind = cdc_ncm_bind, |
1683 | .unbind = cdc_ncm_unbind, | |
2f62d5aa WS |
1684 | .manage_power = usbnet_manage_power, |
1685 | .status = cdc_ncm_status, | |
1686 | .rx_fixup = cdc_ncm_rx_fixup, | |
1687 | .tx_fixup = cdc_ncm_tx_fixup, | |
1688 | }; | |
1689 | ||
f94898ea DW |
1690 | static const struct usb_device_id cdc_devs[] = { |
1691 | /* Ericsson MBM devices like F5521gw */ | |
1692 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1693 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1694 | .idVendor = 0x0bdb, | |
1695 | .bInterfaceClass = USB_CLASS_COMM, | |
1696 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1697 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1698 | .driver_info = (unsigned long) &wwan_info, | |
1699 | }, | |
1700 | ||
79f42232 DP |
1701 | /* Telit LE910 V2 */ |
1702 | { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, | |
1703 | USB_CLASS_COMM, | |
1704 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1705 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1706 | }, | |
1707 | ||
670c0d62 DP |
1708 | /* DW5812 LTE Verizon Mobile Broadband Card |
1709 | * Unlike DW5550 this device requires FLAG_NOARP | |
1710 | */ | |
1711 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, | |
1712 | USB_CLASS_COMM, | |
1713 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1714 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1715 | }, | |
1716 | ||
fb83d5f2 DP |
1717 | /* DW5813 LTE AT&T Mobile Broadband Card |
1718 | * Unlike DW5550 this device requires FLAG_NOARP | |
1719 | */ | |
1720 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, | |
1721 | USB_CLASS_COMM, | |
1722 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1723 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1724 | }, | |
1725 | ||
f3a1ef9c PM |
1726 | /* Dell branded MBM devices like DW5550 */ |
1727 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1728 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1729 | .idVendor = 0x413c, | |
1730 | .bInterfaceClass = USB_CLASS_COMM, | |
1731 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1732 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1733 | .driver_info = (unsigned long) &wwan_info, | |
1734 | }, | |
1735 | ||
1736 | /* Toshiba branded MBM devices */ | |
1737 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1738 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1739 | .idVendor = 0x0930, | |
1740 | .bInterfaceClass = USB_CLASS_COMM, | |
1741 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1742 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1743 | .driver_info = (unsigned long) &wwan_info, | |
1744 | }, | |
1745 | ||
1f84eab4 BM |
1746 | /* tag Huawei devices as wwan */ |
1747 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
1748 | USB_CLASS_COMM, | |
1749 | USB_CDC_SUBCLASS_NCM, | |
1750 | USB_CDC_PROTO_NONE), | |
1751 | .driver_info = (unsigned long)&wwan_info, | |
1752 | }, | |
1753 | ||
2f62d5aa WS |
1754 | /* Infineon(now Intel) HSPA Modem platform */ |
1755 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
1756 | USB_CLASS_COMM, | |
1757 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1758 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1759 | }, | |
1760 | ||
f94898ea DW |
1761 | /* Generic CDC-NCM devices */ |
1762 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
1763 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1764 | .driver_info = (unsigned long)&cdc_ncm_info, | |
1765 | }, | |
1766 | { | |
1767 | }, | |
1768 | }; | |
1769 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
1770 | ||
900d495a AO |
1771 | static struct usb_driver cdc_ncm_driver = { |
1772 | .name = "cdc_ncm", | |
1773 | .id_table = cdc_devs, | |
085e50e1 BM |
1774 | .probe = usbnet_probe, |
1775 | .disconnect = usbnet_disconnect, | |
900d495a AO |
1776 | .suspend = usbnet_suspend, |
1777 | .resume = usbnet_resume, | |
85e3c65f | 1778 | .reset_resume = usbnet_resume, |
900d495a | 1779 | .supports_autosuspend = 1, |
e1f12eb6 | 1780 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
1781 | }; |
1782 | ||
d632eb1b | 1783 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
1784 | |
1785 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1786 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1787 | MODULE_LICENSE("Dual BSD/GPL"); |