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net: cdc_ncm: fix argument alignment
[linux-2.6-block.git] / drivers / net / usb / cdc_ncm.c
CommitLineData
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)
9 * http://www.usb.org/developers/devclass_docs/NCM10.zip
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>
44#include <linux/ethtool.h>
45#include <linux/workqueue.h>
46#include <linux/mii.h>
47#include <linux/crc32.h>
48#include <linux/usb.h>
c84ff1d6 49#include <linux/hrtimer.h>
900d495a
AO		 50#include <linux/atomic.h>
51#include <linux/usb/usbnet.h>
52#include <linux/usb/cdc.h>
c91ce3b6 53#include <linux/usb/cdc_ncm.h>
900d495a 54
1e8bbe6c
BM		 55#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
56static bool prefer_mbim = true;
57#else
58static bool prefer_mbim;
59#endif
60module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
61MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
62
c84ff1d6
AO		 63static void cdc_ncm_txpath_bh(unsigned long param);
64static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
65static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
900d495a 66static struct usb_driver cdc_ncm_driver;
900d495a 67
beeecd42
BM		 68struct cdc_ncm_stats {
69 char stat_string[ETH_GSTRING_LEN];
70 int sizeof_stat;
71 int stat_offset;
72};
73
74#define CDC_NCM_STAT(str, m) { \
75 .stat_string = str, \
76 .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \
77 .stat_offset = offsetof(struct cdc_ncm_ctx, m) }
78#define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m)
79
80static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = {
81 CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full),
82 CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full),
83 CDC_NCM_SIMPLE_STAT(tx_reason_timeout),
84 CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram),
85 CDC_NCM_SIMPLE_STAT(tx_overhead),
86 CDC_NCM_SIMPLE_STAT(tx_ntbs),
87 CDC_NCM_SIMPLE_STAT(rx_overhead),
88 CDC_NCM_SIMPLE_STAT(rx_ntbs),
89};
90
91static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset)
92{
93 switch (sset) {
94 case ETH_SS_STATS:
95 return ARRAY_SIZE(cdc_ncm_gstrings_stats);
96 default:
97 return -EOPNOTSUPP;
98 }
99}
100
101static void cdc_ncm_get_ethtool_stats(struct net_device *netdev,
102 struct ethtool_stats __always_unused *stats,
103 u64 *data)
104{
105 struct usbnet *dev = netdev_priv(netdev);
106 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
107 int i;
108 char *p = NULL;
109
110 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
111 p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset;
112 data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
113 }
114}
115
116static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data)
117{
118 u8 *p = data;
119 int i;
120
121 switch (stringset) {
122 case ETH_SS_STATS:
123 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
124 memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN);
125 p += ETH_GSTRING_LEN;
126 }
127 }
128}
129
6c4e548f
BM		 130static int cdc_ncm_get_coalesce(struct net_device *netdev,
131 struct ethtool_coalesce *ec)
132{
133 struct usbnet *dev = netdev_priv(netdev);
134 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
135
136 /* assuming maximum sized dgrams and ignoring NDPs */
137 ec->rx_max_coalesced_frames = ctx->rx_max / ctx->max_datagram_size;
138 ec->tx_max_coalesced_frames = ctx->tx_max / ctx->max_datagram_size;
139
140 /* the timer will fire CDC_NCM_TIMER_PENDING_CNT times in a row */
141 ec->tx_coalesce_usecs = (ctx->timer_interval * CDC_NCM_TIMER_PENDING_CNT) / NSEC_PER_USEC;
142 return 0;
143}
144
145static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
146
147static int cdc_ncm_set_coalesce(struct net_device *netdev,
148 struct ethtool_coalesce *ec)
149{
150 struct usbnet *dev = netdev_priv(netdev);
151 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
152 u32 new_rx_max = ctx->rx_max;
153 u32 new_tx_max = ctx->tx_max;
154
155 /* assuming maximum sized dgrams and a single NDP */
156 if (ec->rx_max_coalesced_frames)
157 new_rx_max = ec->rx_max_coalesced_frames * ctx->max_datagram_size;
158 if (ec->tx_max_coalesced_frames)
159 new_tx_max = ec->tx_max_coalesced_frames * ctx->max_datagram_size;
160
161 if (ec->tx_coalesce_usecs &&
162 (ec->tx_coalesce_usecs < CDC_NCM_TIMER_INTERVAL_MIN * CDC_NCM_TIMER_PENDING_CNT ||
163 ec->tx_coalesce_usecs > CDC_NCM_TIMER_INTERVAL_MAX * CDC_NCM_TIMER_PENDING_CNT))
164 return -EINVAL;
165
166 spin_lock_bh(&ctx->mtx);
167 ctx->timer_interval = ec->tx_coalesce_usecs * NSEC_PER_USEC / CDC_NCM_TIMER_PENDING_CNT;
168 if (!ctx->timer_interval)
169 ctx->tx_timer_pending = 0;
170 spin_unlock_bh(&ctx->mtx);
171
172 /* inform device of new values */
173 if (new_rx_max != ctx->rx_max || new_tx_max != ctx->tx_max)
174 cdc_ncm_update_rxtx_max(dev, new_rx_max, new_tx_max);
175 return 0;
176}
177
178static const struct ethtool_ops cdc_ncm_ethtool_ops = {
179 .get_settings = usbnet_get_settings,
180 .set_settings = usbnet_set_settings,
181 .get_link = usbnet_get_link,
182 .nway_reset = usbnet_nway_reset,
183 .get_drvinfo = usbnet_get_drvinfo,
184 .get_msglevel = usbnet_get_msglevel,
185 .set_msglevel = usbnet_set_msglevel,
186 .get_ts_info = ethtool_op_get_ts_info,
beeecd42
BM		 187 .get_sset_count = cdc_ncm_get_sset_count,
188 .get_strings = cdc_ncm_get_strings,
189 .get_ethtool_stats = cdc_ncm_get_ethtool_stats,
6c4e548f
BM		 190 .get_coalesce = cdc_ncm_get_coalesce,
191 .set_coalesce = cdc_ncm_set_coalesce,
192};
193
5aa73d5d
BM		 194/* handle rx_max and tx_max changes */
195static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
196{
197 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
198 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
199 u32 val, max, min;
200
201 /* clamp new_rx to sane values */
202 min = USB_CDC_NCM_NTB_MIN_IN_SIZE;
203 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
204
205 /* dwNtbInMaxSize spec violation? Use MIN size for both limits */
206 if (max < min) {
207 dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n",
208 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min);
209 max = min;
210 }
211
212 val = clamp_t(u32, new_rx, min, max);
213 if (val != new_rx) {
214 dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range. Using %u\n",
215 min, max, val);
216 }
217
68864abf
BM		 218 /* usbnet use these values for sizing rx queues */
219 dev->rx_urb_size = val;
220
5aa73d5d
BM		 221 /* inform device about NTB input size changes */
222 if (val != ctx->rx_max) {
223 __le32 dwNtbInMaxSize = cpu_to_le32(val);
224
225 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
68864abf
BM		 226
227 /* need to unlink rx urbs before increasing buffer size */
228 if (netif_running(dev->net) && dev->rx_urb_size > ctx->rx_max)
229 usbnet_unlink_rx_urbs(dev);
230
231 /* tell device to use new size */
5aa73d5d
BM		 232 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
233 USB_TYPE_CLASS | USB_DIR_OUT
234 | USB_RECIP_INTERFACE,
235 0, iface_no, &dwNtbInMaxSize, 4) < 0)
236 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
237 else
238 ctx->rx_max = val;
239 }
240
241 /* clamp new_tx to sane values */
70559b89 242 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
5aa73d5d
BM		 243 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
244
245 /* some devices set dwNtbOutMaxSize too low for the above default */
246 min = min(min, max);
247
248 val = clamp_t(u32, new_tx, min, max);
249 if (val != new_tx) {
250 dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range. Using %u\n",
251 min, max, val);
252 }
253 if (val != ctx->tx_max)
254 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
08c74fc9
BM		 255
256 /* Adding a pad byte here if necessary simplifies the handling
257 * in cdc_ncm_fill_tx_frame, making tx_max always represent
258 * the real skb max size.
259 *
260 * We cannot use dev->maxpacket here because this is called from
261 * .bind which is called before usbnet sets up dev->maxpacket
262 */
68864abf
BM		 263 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
264 val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
265 val++;
266
267 /* we might need to flush any pending tx buffers if running */
268 if (netif_running(dev->net) && val > ctx->tx_max) {
269 netif_tx_lock_bh(dev->net);
270 usbnet_start_xmit(NULL, dev->net);
271 ctx->tx_max = val;
272 netif_tx_unlock_bh(dev->net);
273 } else {
274 ctx->tx_max = val;
275 }
08c74fc9 276
08c74fc9 277 dev->hard_mtu = ctx->tx_max;
68864abf
BM		 278
279 /* max qlen depend on hard_mtu and rx_urb_size */
280 usbnet_update_max_qlen(dev);
43e4c6df
BM		 281
282 /* never pad more than 3 full USB packets per transfer */
283 ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1),
284 CDC_NCM_MIN_TX_PKT, ctx->tx_max);
5aa73d5d
BM		 285}
286
f8afb73d
BM		 287/* helpers for NCM and MBIM differences */
288static u8 cdc_ncm_flags(struct usbnet *dev)
900d495a 289{
bed6f762 290 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
900d495a 291
f8afb73d
BM		 292 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
293 return ctx->mbim_desc->bmNetworkCapabilities;
294 if (ctx->func_desc)
295 return ctx->func_desc->bmNetworkCapabilities;
296 return 0;
297}
298
299static int cdc_ncm_eth_hlen(struct usbnet *dev)
300{
301 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
302 return 0;
303 return ETH_HLEN;
304}
305
306static u32 cdc_ncm_min_dgram_size(struct usbnet *dev)
307{
308 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
309 return CDC_MBIM_MIN_DATAGRAM_SIZE;
310 return CDC_NCM_MIN_DATAGRAM_SIZE;
311}
312
313static u32 cdc_ncm_max_dgram_size(struct usbnet *dev)
314{
315 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
316
317 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
318 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
319 if (ctx->ether_desc)
320 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
321 return CDC_NCM_MAX_DATAGRAM_SIZE;
322}
323
324/* initial one-time device setup. MUST be called with the data interface
325 * in altsetting 0
326 */
327static int cdc_ncm_init(struct usbnet *dev)
328{
329 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
330 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
331 int err;
900d495a 332
90b8b037
ML		 333 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
334 USB_TYPE_CLASS | USB_DIR_IN
335 |USB_RECIP_INTERFACE,
ff0992e9
BM		 336 0, iface_no, &ctx->ncm_parm,
337 sizeof(ctx->ncm_parm));
36c35416 338 if (err < 0) {
59ede316
BM		 339 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
340 return err; /* GET_NTB_PARAMETERS is required */
900d495a
AO		 341 }
342
f8afb73d
BM		 343 /* set CRC Mode */
344 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) {
345 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n");
346 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
347 USB_TYPE_CLASS | USB_DIR_OUT
348 | USB_RECIP_INTERFACE,
349 USB_CDC_NCM_CRC_NOT_APPENDED,
350 iface_no, NULL, 0);
351 if (err < 0)
352 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n");
353 }
354
355 /* set NTB format, if both formats are supported.
356 *
357 * "The host shall only send this command while the NCM Data
358 * Interface is in alternate setting 0."
359 */
360 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & USB_CDC_NCM_NTH32_SIGN) {
361 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n");
362 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
363 USB_TYPE_CLASS | USB_DIR_OUT
364 | USB_RECIP_INTERFACE,
365 USB_CDC_NCM_NTB16_FORMAT,
366 iface_no, NULL, 0);
367 if (err < 0)
368 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
369 }
370
371 /* set initial device values */
ff0992e9
BM		 372 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
373 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
374 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
375 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
376 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
84e77a8b 377 /* devices prior to NCM Errata shall set this field to zero */
ff0992e9 378 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
47175e5f 379
ae223cd4
BM		 380 dev_dbg(&dev->intf->dev,
381 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
382 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
f8afb73d 383 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
900d495a 384
84e77a8b
AO		 385 /* max count of tx datagrams */
386 if ((ctx->tx_max_datagrams == 0) ||
387 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
388 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
900d495a 389
70559b89
BM		 390 /* set up maximum NDP size */
391 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
392
6c4e548f
BM		 393 /* initial coalescing timer interval */
394 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
395
f8afb73d
BM		 396 return 0;
397}
398
399/* set a new max datagram size */
400static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size)
401{
402 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
403 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
404 __le16 max_datagram_size;
405 u16 mbim_mtu;
406 int err;
407
408 /* set default based on descriptors */
409 ctx->max_datagram_size = clamp_t(u32, new_size,
410 cdc_ncm_min_dgram_size(dev),
411 CDC_NCM_MAX_DATAGRAM_SIZE);
412
413 /* inform the device about the selected Max Datagram Size? */
414 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
415 goto out;
416
417 /* read current mtu value from device */
418 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
419 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
420 0, iface_no, &max_datagram_size, 2);
421 if (err < 0) {
422 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
423 goto out;
424 }
425
426 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
427 goto out;
428
429 max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
430 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
431 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
432 0, iface_no, &max_datagram_size, 2);
433 if (err < 0)
434 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
435
436out:
437 /* set MTU to max supported by the device if necessary */
438 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
439
440 /* do not exceed operater preferred MTU */
441 if (ctx->mbim_extended_desc) {
442 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU);
443 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu)
444 dev->net->mtu = mbim_mtu;
445 }
446}
447
448static void cdc_ncm_fix_modulus(struct usbnet *dev)
449{
450 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
451 u32 val;
900d495a
AO		 452
453 /*
454 * verify that the structure alignment is:
455 * - power of two
456 * - not greater than the maximum transmit length
457 * - not less than four bytes
458 */
459 val = ctx->tx_ndp_modulus;
460
461 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
462 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
ae223cd4 463 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
900d495a
AO		 464 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
465 }
466
467 /*
468 * verify that the payload alignment is:
469 * - power of two
470 * - not greater than the maximum transmit length
471 * - not less than four bytes
472 */
473 val = ctx->tx_modulus;
474
475 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
476 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
ae223cd4 477 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
900d495a
AO		 478 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
479 }
480
481 /* verify the payload remainder */
482 if (ctx->tx_remainder >= ctx->tx_modulus) {
ae223cd4 483 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
900d495a
AO		 484 ctx->tx_remainder = 0;
485 }
486
487 /* adjust TX-remainder according to NCM specification. */
f8afb73d 488 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
2d1c4310 489 (ctx->tx_modulus - 1));
f8afb73d 490}
900d495a 491
f8afb73d
BM		 492static int cdc_ncm_setup(struct usbnet *dev)
493{
494 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
50f1cb1c
BM		 495 u32 def_rx, def_tx;
496
497 /* be conservative when selecting intial buffer size to
498 * increase the number of hosts this will work for
499 */
500 def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX,
501 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
502 def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX,
503 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
900d495a 504
f8afb73d 505 /* clamp rx_max and tx_max and inform device */
50f1cb1c 506 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx);
259fef03 507
f8afb73d
BM		 508 /* sanitize the modulus and remainder values */
509 cdc_ncm_fix_modulus(dev);
259fef03 510
f8afb73d
BM		 511 /* set max datagram size */
512 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
900d495a
AO		 513 return 0;
514}
515
516static void
ff1632aa 517cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
900d495a 518{
ff1632aa 519 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
900d495a
AO		 520 u8 ep;
521
522 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
523
524 e = intf->cur_altsetting->endpoint + ep;
525 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
526 case USB_ENDPOINT_XFER_INT:
527 if (usb_endpoint_dir_in(&e->desc)) {
ff1632aa
BM		 528 if (!dev->status)
529 dev->status = e;
900d495a
AO		 530 }
531 break;
532
533 case USB_ENDPOINT_XFER_BULK:
534 if (usb_endpoint_dir_in(&e->desc)) {
ff1632aa
BM		 535 if (!in)
536 in = e;
900d495a 537 } else {
ff1632aa
BM		 538 if (!out)
539 out = e;
900d495a
AO		 540 }
541 break;
542
543 default:
544 break;
545 }
546 }
ff1632aa
BM		 547 if (in && !dev->in)
548 dev->in = usb_rcvbulkpipe(dev->udev,
549 in->desc.bEndpointAddress &
550 USB_ENDPOINT_NUMBER_MASK);
551 if (out && !dev->out)
552 dev->out = usb_sndbulkpipe(dev->udev,
553 out->desc.bEndpointAddress &
554 USB_ENDPOINT_NUMBER_MASK);
900d495a
AO		 555}
556
557static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
558{
559 if (ctx == NULL)
560 return;
561
900d495a
AO		 562 if (ctx->tx_rem_skb != NULL) {
563 dev_kfree_skb_any(ctx->tx_rem_skb);
564 ctx->tx_rem_skb = NULL;
565 }
566
567 if (ctx->tx_curr_skb != NULL) {
568 dev_kfree_skb_any(ctx->tx_curr_skb);
569 ctx->tx_curr_skb = NULL;
570 }
571
572 kfree(ctx);
573}
574
c91ce3b6 575int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
900d495a 576{
83292236 577 const struct usb_cdc_union_desc *union_desc = NULL;
900d495a
AO		 578 struct cdc_ncm_ctx *ctx;
579 struct usb_driver *driver;
580 u8 *buf;
581 int len;
582 int temp;
583 u8 iface_no;
584
c796984f 585 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
8f0923c1
DN		 586 if (!ctx)
587 return -ENOMEM;
900d495a 588
c84ff1d6
AO		 589 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
590 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
bed6f762 591 ctx->bh.data = (unsigned long)dev;
c84ff1d6
AO		 592 ctx->bh.func = cdc_ncm_txpath_bh;
593 atomic_set(&ctx->stop, 0);
900d495a 594 spin_lock_init(&ctx->mtx);
900d495a
AO		 595
596 /* store ctx pointer in device data field */
597 dev->data[0] = (unsigned long)ctx;
598
9fe0234c
BM		 599 /* only the control interface can be successfully probed */
600 ctx->control = intf;
601
900d495a
AO		 602 /* get some pointers */
603 driver = driver_of(intf);
604 buf = intf->cur_altsetting->extra;
605 len = intf->cur_altsetting->extralen;
606
900d495a
AO		 607 /* parse through descriptors associated with control interface */
608 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
609
610 if (buf[1] != USB_DT_CS_INTERFACE)
611 goto advance;
612
613 switch (buf[2]) {
614 case USB_CDC_UNION_TYPE:
83292236 615 if (buf[0] < sizeof(*union_desc))
900d495a
AO		 616 break;
617
83292236 618 union_desc = (const struct usb_cdc_union_desc *)buf;
9fe0234c
BM		 619 /* the master must be the interface we are probing */
620 if (intf->cur_altsetting->desc.bInterfaceNumber !=
296e81f8
BM		 621 union_desc->bMasterInterface0) {
622 dev_dbg(&intf->dev, "bogus CDC Union\n");
9fe0234c 623 goto error;
296e81f8 624 }
900d495a 625 ctx->data = usb_ifnum_to_if(dev->udev,
83292236 626 union_desc->bSlaveInterface0);
900d495a
AO		 627 break;
628
629 case USB_CDC_ETHERNET_TYPE:
630 if (buf[0] < sizeof(*(ctx->ether_desc)))
631 break;
632
633 ctx->ether_desc =
634 (const struct usb_cdc_ether_desc *)buf;
900d495a
AO		 635 break;
636
637 case USB_CDC_NCM_TYPE:
638 if (buf[0] < sizeof(*(ctx->func_desc)))
639 break;
640
641 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
642 break;
643
38396e4c
GS		 644 case USB_CDC_MBIM_TYPE:
645 if (buf[0] < sizeof(*(ctx->mbim_desc)))
646 break;
647
648 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
649 break;
650
259fef03
BC		 651 case USB_CDC_MBIM_EXTENDED_TYPE:
652 if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))
653 break;
654
655 ctx->mbim_extended_desc =
656 (const struct usb_cdc_mbim_extended_desc *)buf;
657 break;
658
900d495a
AO		 659 default:
660 break;
661 }
662advance:
663 /* advance to next descriptor */
664 temp = buf[0];
665 buf += temp;
666 len -= temp;
667 }
668
9992c2e2 669 /* some buggy devices have an IAD but no CDC Union */
83292236 670 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
56a666dc
BM		 671 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
672 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
9992c2e2
BM		 673 }
674
900d495a 675 /* check if we got everything */
f8afb73d
BM		 676 if (!ctx->data) {
677 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
900d495a 678 goto error;
296e81f8 679 }
f8afb73d
BM		 680 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) {
681 if (!ctx->mbim_desc) {
682 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n");
683 goto error;
684 }
685 } else {
686 if (!ctx->ether_desc || !ctx->func_desc) {
687 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n");
688 goto error;
689 }
690 }
900d495a 691
bbc8d922
BM		 692 /* claim data interface, if different from control */
693 if (ctx->data != ctx->control) {
694 temp = usb_driver_claim_interface(driver, ctx->data, dev);
296e81f8
BM		 695 if (temp) {
696 dev_dbg(&intf->dev, "failed to claim data intf\n");
bbc8d922 697 goto error;
296e81f8 698 }
bbc8d922 699 }
900d495a
AO		 700
701 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
702
703 /* reset data interface */
704 temp = usb_set_interface(dev->udev, iface_no, 0);
296e81f8
BM		 705 if (temp) {
706 dev_dbg(&intf->dev, "set interface failed\n");
19694ac8 707 goto error2;
296e81f8 708 }
900d495a 709
08c74fc9
BM		 710 /* initialize basic device settings */
711 if (cdc_ncm_init(dev))
ff0992e9
BM		 712 goto error2;
713
900d495a 714 /* configure data interface */
38396e4c 715 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
296e81f8
BM		 716 if (temp) {
717 dev_dbg(&intf->dev, "set interface failed\n");
19694ac8 718 goto error2;
296e81f8 719 }
900d495a 720
ff1632aa
BM		 721 cdc_ncm_find_endpoints(dev, ctx->data);
722 cdc_ncm_find_endpoints(dev, ctx->control);
296e81f8
BM		 723 if (!dev->in || !dev->out || !dev->status) {
724 dev_dbg(&intf->dev, "failed to collect endpoints\n");
19694ac8 725 goto error2;
296e81f8 726 }
900d495a 727
900d495a
AO		 728 usb_set_intfdata(ctx->data, dev);
729 usb_set_intfdata(ctx->control, dev);
900d495a 730
38396e4c
GS		 731 if (ctx->ether_desc) {
732 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
296e81f8
BM		 733 if (temp) {
734 dev_dbg(&intf->dev, "failed to get mac address\n");
38396e4c 735 goto error2;
296e81f8
BM		 736 }
737 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
38396e4c 738 }
900d495a 739
08c74fc9
BM		 740 /* finish setting up the device specific data */
741 cdc_ncm_setup(dev);
ff0992e9 742
6c4e548f
BM		 743 /* override ethtool_ops */
744 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
745
900d495a
AO		 746 return 0;
747
19694ac8
AO		 748error2:
749 usb_set_intfdata(ctx->control, NULL);
750 usb_set_intfdata(ctx->data, NULL);
6b4ef602
BM		 751 if (ctx->data != ctx->control)
752 usb_driver_release_interface(driver, ctx->data);
900d495a
AO		 753error:
754 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
755 dev->data[0] = 0;
296e81f8 756 dev_info(&intf->dev, "bind() failure\n");
900d495a
AO		 757 return -ENODEV;
758}
c91ce3b6 759EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
900d495a 760
c91ce3b6 761void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
900d495a
AO		 762{
763 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
19694ac8 764 struct usb_driver *driver = driver_of(intf);
900d495a
AO		 765
766 if (ctx == NULL)
767 return; /* no setup */
768
c84ff1d6
AO		 769 atomic_set(&ctx->stop, 1);
770
771 if (hrtimer_active(&ctx->tx_timer))
772 hrtimer_cancel(&ctx->tx_timer);
773
774 tasklet_kill(&ctx->bh);
775
bbc8d922
BM		 776 /* handle devices with combined control and data interface */
777 if (ctx->control == ctx->data)
778 ctx->data = NULL;
779
19694ac8
AO		 780 /* disconnect master --> disconnect slave */
781 if (intf == ctx->control && ctx->data) {
782 usb_set_intfdata(ctx->data, NULL);
900d495a 783 usb_driver_release_interface(driver, ctx->data);
19694ac8 784 ctx->data = NULL;
900d495a 785
19694ac8
AO		 786 } else if (intf == ctx->data && ctx->control) {
787 usb_set_intfdata(ctx->control, NULL);
900d495a 788 usb_driver_release_interface(driver, ctx->control);
19694ac8 789 ctx->control = NULL;
900d495a
AO		 790 }
791
3e515665 792 usb_set_intfdata(intf, NULL);
900d495a
AO		 793 cdc_ncm_free(ctx);
794}
c91ce3b6 795EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
900d495a 796
50a0ffaf
BM		 797/* Return the number of the MBIM control interface altsetting iff it
798 * is preferred and available,
1e8bbe6c 799 */
50a0ffaf 800u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
38396e4c 801{
1e8bbe6c 802 struct usb_host_interface *alt;
38396e4c 803
bd329e12
BM		 804 /* The MBIM spec defines a NCM compatible default altsetting,
805 * which we may have matched:
806 *
807 * "Functions that implement both NCM 1.0 and MBIM (an
808 * “NCM/MBIM function”) according to this recommendation
809 * shall provide two alternate settings for the
810 * Communication Interface. Alternate setting 0, and the
811 * associated class and endpoint descriptors, shall be
812 * constructed according to the rules given for the
813 * Communication Interface in section 5 of [USBNCM10].
814 * Alternate setting 1, and the associated class and
815 * endpoint descriptors, shall be constructed according to
816 * the rules given in section 6 (USB Device Model) of this
817 * specification."
bd329e12 818 */
50a0ffaf
BM		 819 if (intf->num_altsetting < 2)
820 return intf->cur_altsetting->desc.bAlternateSetting;
821
822 if (prefer_mbim) {
1e8bbe6c 823 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
50a0ffaf
BM		 824 if (alt && cdc_ncm_comm_intf_is_mbim(alt))
825 return CDC_NCM_COMM_ALTSETTING_MBIM;
f350ca03 826 }
50a0ffaf 827 return CDC_NCM_COMM_ALTSETTING_NCM;
1e8bbe6c
BM		 828}
829EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
830
831static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
832{
833 int ret;
834
835 /* MBIM backwards compatible function? */
50a0ffaf 836 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
1e8bbe6c 837 return -ENODEV;
bd329e12 838
50a0ffaf
BM		 839 /* The NCM data altsetting is fixed */
840 ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM);
38396e4c
GS		 841
842 /*
843 * We should get an event when network connection is "connected" or
844 * "disconnected". Set network connection in "disconnected" state
845 * (carrier is OFF) during attach, so the IP network stack does not
846 * start IPv6 negotiation and more.
847 */
8a34b0ae 848 usbnet_link_change(dev, 0, 0);
38396e4c
GS		 849 return ret;
850}
851
c78b7c58 852static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
900d495a 853{
c78b7c58
BM		 854 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
855
856 if (skb->len + align > max)
857 align = max - skb->len;
858 if (align && skb_tailroom(skb) >= align)
859 memset(skb_put(skb, align), 0, align);
860}
861
862/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
863 * allocating a new one within skb
864 */
865static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
866{
867 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
868 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
869 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
870
871 /* follow the chain of NDPs, looking for a match */
872 while (ndpoffset) {
873 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
874 if (ndp16->dwSignature == sign)
875 return ndp16;
876 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
877 }
878
879 /* align new NDP */
880 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
881
882 /* verify that there is room for the NDP and the datagram (reserve) */
70559b89 883 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size)
c78b7c58
BM		 884 return NULL;
885
886 /* link to it */
887 if (ndp16)
888 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
889 else
890 nth16->wNdpIndex = cpu_to_le16(skb->len);
891
892 /* push a new empty NDP */
70559b89 893 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size);
c78b7c58
BM		 894 ndp16->dwSignature = sign;
895 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
896 return ndp16;
900d495a
AO		 897}
898
c91ce3b6 899struct sk_buff *
bed6f762 900cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
900d495a 901{
bed6f762 902 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
c78b7c58
BM		 903 struct usb_cdc_ncm_nth16 *nth16;
904 struct usb_cdc_ncm_ndp16 *ndp16;
900d495a 905 struct sk_buff *skb_out;
c78b7c58 906 u16 n = 0, index, ndplen;
84e77a8b 907 u8 ready2send = 0;
900d495a
AO		 908
909 /* if there is a remaining skb, it gets priority */
c78b7c58 910 if (skb != NULL) {
900d495a 911 swap(skb, ctx->tx_rem_skb);
c78b7c58
BM		 912 swap(sign, ctx->tx_rem_sign);
913 } else {
84e77a8b 914 ready2send = 1;
c78b7c58 915 }
900d495a
AO		 916
917 /* check if we are resuming an OUT skb */
c78b7c58 918 skb_out = ctx->tx_curr_skb;
900d495a 919
c78b7c58
BM		 920 /* allocate a new OUT skb */
921 if (!skb_out) {
20572226 922 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
900d495a
AO		 923 if (skb_out == NULL) {
924 if (skb != NULL) {
925 dev_kfree_skb_any(skb);
bed6f762 926 dev->net->stats.tx_dropped++;
900d495a
AO		 927 }
928 goto exit_no_skb;
929 }
c78b7c58
BM		 930 /* fill out the initial 16-bit NTB header */
931 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
932 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
933 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
934 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
900d495a 935
c78b7c58 936 /* count total number of frames in this NTB */
900d495a 937 ctx->tx_curr_frame_num = 0;
beeecd42
BM		 938
939 /* recent payload counter for this skb_out */
940 ctx->tx_curr_frame_payload = 0;
900d495a
AO		 941 }
942
c78b7c58
BM		 943 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
944 /* send any remaining skb first */
900d495a
AO		 945 if (skb == NULL) {
946 skb = ctx->tx_rem_skb;
c78b7c58 947 sign = ctx->tx_rem_sign;
900d495a
AO		 948 ctx->tx_rem_skb = NULL;
949
950 /* check for end of skb */
951 if (skb == NULL)
952 break;
953 }
954
c78b7c58
BM		 955 /* get the appropriate NDP for this skb */
956 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
957
958 /* align beginning of next frame */
959 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
960
961 /* check if we had enough room left for both NDP and frame */
962 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
900d495a
AO		 963 if (n == 0) {
964 /* won't fit, MTU problem? */
965 dev_kfree_skb_any(skb);
966 skb = NULL;
bed6f762 967 dev->net->stats.tx_dropped++;
900d495a
AO		 968 } else {
969 /* no room for skb - store for later */
970 if (ctx->tx_rem_skb != NULL) {
971 dev_kfree_skb_any(ctx->tx_rem_skb);
bed6f762 972 dev->net->stats.tx_dropped++;
900d495a
AO		 973 }
974 ctx->tx_rem_skb = skb;
c78b7c58 975 ctx->tx_rem_sign = sign;
900d495a 976 skb = NULL;
84e77a8b 977 ready2send = 1;
beeecd42 978 ctx->tx_reason_ntb_full++; /* count reason for transmitting */
900d495a
AO		 979 }
980 break;
981 }
982
c78b7c58
BM		 983 /* calculate frame number withing this NDP */
984 ndplen = le16_to_cpu(ndp16->wLength);
985 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
900d495a 986
c78b7c58
BM		 987 /* OK, add this skb */
988 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
989 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
990 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
991 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
beeecd42 992 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */
900d495a
AO		 993 dev_kfree_skb_any(skb);
994 skb = NULL;
c78b7c58
BM		 995
996 /* send now if this NDP is full */
997 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
998 ready2send = 1;
beeecd42 999 ctx->tx_reason_ndp_full++; /* count reason for transmitting */
c78b7c58
BM		 1000 break;
1001 }
900d495a
AO		 1002 }
1003
1004 /* free up any dangling skb */
1005 if (skb != NULL) {
1006 dev_kfree_skb_any(skb);
1007 skb = NULL;
bed6f762 1008 dev->net->stats.tx_dropped++;
900d495a
AO		 1009 }
1010
1011 ctx->tx_curr_frame_num = n;
1012
1013 if (n == 0) {
1014 /* wait for more frames */
1015 /* push variables */
1016 ctx->tx_curr_skb = skb_out;
900d495a
AO		 1017 goto exit_no_skb;
1018
6c4e548f 1019 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
900d495a
AO		 1020 /* wait for more frames */
1021 /* push variables */
1022 ctx->tx_curr_skb = skb_out;
900d495a
AO		 1023 /* set the pending count */
1024 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
c84ff1d6 1025 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
900d495a
AO		 1026 goto exit_no_skb;
1027
1028 } else {
beeecd42
BM		 1029 if (n == ctx->tx_max_datagrams)
1030 ctx->tx_reason_max_datagram++; /* count reason for transmitting */
900d495a
AO		 1031 /* frame goes out */
1032 /* variables will be reset at next call */
1033 }
1034
43e4c6df 1035 /* If collected data size is less or equal ctx->min_tx_pkt
20572226
BM		 1036 * bytes, we send buffers as it is. If we get more data, it
1037 * would be more efficient for USB HS mobile device with DMA
1038 * engine to receive a full size NTB, than canceling DMA
1039 * transfer and receiving a short packet.
4d619f62
BM		 1040 *
1041 * This optimization support is pointless if we end up sending
1042 * a ZLP after full sized NTBs.
900d495a 1043 */
4d619f62 1044 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
43e4c6df 1045 skb_out->len > ctx->min_tx_pkt)
20572226
BM		 1046 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
1047 ctx->tx_max - skb_out->len);
9becd707 1048 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0)
c78b7c58 1049 *skb_put(skb_out, 1) = 0; /* force short packet */
900d495a 1050
c78b7c58
BM		 1051 /* set final frame length */
1052 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1053 nth16->wBlockLength = cpu_to_le16(skb_out->len);
900d495a
AO		 1054
1055 /* return skb */
1056 ctx->tx_curr_skb = NULL;
bed6f762 1057 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
beeecd42
BM		 1058
1059 /* keep private stats: framing overhead and number of NTBs */
1060 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
1061 ctx->tx_ntbs++;
1062
1063 /* usbnet has already counted all the framing overhead.
1064 * Adjust the stats so that the tx_bytes counter show real
1065 * payload data instead.
1066 */
1067 dev->net->stats.tx_bytes -= skb_out->len - ctx->tx_curr_frame_payload;
1068
900d495a
AO		 1069 return skb_out;
1070
1071exit_no_skb:
c84ff1d6
AO		 1072 /* Start timer, if there is a remaining skb */
1073 if (ctx->tx_curr_skb != NULL)
1074 cdc_ncm_tx_timeout_start(ctx);
900d495a
AO		 1075 return NULL;
1076}
c91ce3b6 1077EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
900d495a
AO		 1078
1079static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
1080{
1081 /* start timer, if not already started */
c84ff1d6
AO		 1082 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
1083 hrtimer_start(&ctx->tx_timer,
6c4e548f 1084 ktime_set(0, ctx->timer_interval),
c84ff1d6 1085 HRTIMER_MODE_REL);
900d495a
AO		 1086}
1087
c84ff1d6 1088static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
900d495a 1089{
c84ff1d6
AO		 1090 struct cdc_ncm_ctx *ctx =
1091 container_of(timer, struct cdc_ncm_ctx, tx_timer);
900d495a 1092
c84ff1d6
AO		 1093 if (!atomic_read(&ctx->stop))
1094 tasklet_schedule(&ctx->bh);
1095 return HRTIMER_NORESTART;
1096}
900d495a 1097
c84ff1d6
AO		 1098static void cdc_ncm_txpath_bh(unsigned long param)
1099{
bed6f762
BM		 1100 struct usbnet *dev = (struct usbnet *)param;
1101 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
900d495a 1102
c84ff1d6
AO		 1103 spin_lock_bh(&ctx->mtx);
1104 if (ctx->tx_timer_pending != 0) {
1105 ctx->tx_timer_pending--;
900d495a 1106 cdc_ncm_tx_timeout_start(ctx);
c84ff1d6 1107 spin_unlock_bh(&ctx->mtx);
bed6f762 1108 } else if (dev->net != NULL) {
beeecd42 1109 ctx->tx_reason_timeout++; /* count reason for transmitting */
c84ff1d6 1110 spin_unlock_bh(&ctx->mtx);
bed6f762
BM		 1111 netif_tx_lock_bh(dev->net);
1112 usbnet_start_xmit(NULL, dev->net);
1113 netif_tx_unlock_bh(dev->net);
7b1e0cba
BM		 1114 } else {
1115 spin_unlock_bh(&ctx->mtx);
f742aa8a 1116 }
900d495a
AO		 1117}
1118
2f69702c 1119struct sk_buff *
900d495a
AO		 1120cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1121{
1122 struct sk_buff *skb_out;
1123 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
900d495a
AO		 1124
1125 /*
1126 * The Ethernet API we are using does not support transmitting
1127 * multiple Ethernet frames in a single call. This driver will
1128 * accumulate multiple Ethernet frames and send out a larger
1129 * USB frame when the USB buffer is full or when a single jiffies
1130 * timeout happens.
1131 */
1132 if (ctx == NULL)
1133 goto error;
1134
c84ff1d6 1135 spin_lock_bh(&ctx->mtx);
bed6f762 1136 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
c84ff1d6 1137 spin_unlock_bh(&ctx->mtx);
900d495a
AO		 1138 return skb_out;
1139
1140error:
1141 if (skb != NULL)
1142 dev_kfree_skb_any(skb);
1143
1144 return NULL;
1145}
2f69702c 1146EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
900d495a 1147
ff06ab13 1148/* verify NTB header and return offset of first NDP, or negative error */
c91ce3b6 1149int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
900d495a 1150{
ae223cd4 1151 struct usbnet *dev = netdev_priv(skb_in->dev);
d5ddb4a5 1152 struct usb_cdc_ncm_nth16 *nth16;
ff06ab13
BM		 1153 int len;
1154 int ret = -EINVAL;
900d495a 1155
900d495a
AO		 1156 if (ctx == NULL)
1157 goto error;
1158
d5ddb4a5
AO		 1159 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
1160 sizeof(struct usb_cdc_ncm_ndp16))) {
ae223cd4 1161 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
900d495a
AO		 1162 goto error;
1163 }
1164
d5ddb4a5 1165 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
900d495a 1166
986e10d6 1167 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
5448d75f
BM		 1168 netif_dbg(dev, rx_err, dev->net,
1169 "invalid NTH16 signature <%#010x>\n",
1170 le32_to_cpu(nth16->dwSignature));
900d495a
AO		 1171 goto error;
1172 }
1173
d5ddb4a5
AO		 1174 len = le16_to_cpu(nth16->wBlockLength);
1175 if (len > ctx->rx_max) {
ae223cd4
BM		 1176 netif_dbg(dev, rx_err, dev->net,
1177 "unsupported NTB block length %u/%u\n", len,
1178 ctx->rx_max);
900d495a
AO		 1179 goto error;
1180 }
1181
d5ddb4a5 1182 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
ae223cd4
BM		 1183 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
1184 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
1185 netif_dbg(dev, rx_err, dev->net,
1186 "sequence number glitch prev=%d curr=%d\n",
1187 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
d5ddb4a5
AO		 1188 }
1189 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
1190
ff06ab13
BM		 1191 ret = le16_to_cpu(nth16->wNdpIndex);
1192error:
1193 return ret;
1194}
c91ce3b6 1195EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
ff06ab13
BM		 1196
1197/* verify NDP header and return number of datagrams, or negative error */
c91ce3b6 1198int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
ff06ab13 1199{
ae223cd4 1200 struct usbnet *dev = netdev_priv(skb_in->dev);
ff06ab13
BM		 1201 struct usb_cdc_ncm_ndp16 *ndp16;
1202 int ret = -EINVAL;
1203
75d67d35 1204 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
ae223cd4
BM		 1205 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1206 ndpoffset);
900d495a
AO		 1207 goto error;
1208 }
75d67d35 1209 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
900d495a 1210
d5ddb4a5 1211 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
ae223cd4
BM		 1212 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
1213 le16_to_cpu(ndp16->wLength));
ff06ab13 1214 goto error;
900d495a
AO		 1215 }
1216
ff06ab13 1217 ret = ((le16_to_cpu(ndp16->wLength) -
900d495a
AO		 1218 sizeof(struct usb_cdc_ncm_ndp16)) /
1219 sizeof(struct usb_cdc_ncm_dpe16));
ff06ab13 1220 ret--; /* we process NDP entries except for the last one */
900d495a 1221
ae223cd4
BM		 1222 if ((sizeof(struct usb_cdc_ncm_ndp16) +
1223 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
1224 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
ff06ab13 1225 ret = -EINVAL;
900d495a
AO		 1226 }
1227
ff06ab13
BM		 1228error:
1229 return ret;
1230}
c91ce3b6 1231EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
ff06ab13 1232
2f69702c 1233int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
ff06ab13
BM		 1234{
1235 struct sk_buff *skb;
1236 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1237 int len;
1238 int nframes;
1239 int x;
1240 int offset;
1241 struct usb_cdc_ncm_ndp16 *ndp16;
1242 struct usb_cdc_ncm_dpe16 *dpe16;
1243 int ndpoffset;
1244 int loopcount = 50; /* arbitrary max preventing infinite loop */
beeecd42 1245 u32 payload = 0;
ff06ab13
BM		 1246
1247 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
1248 if (ndpoffset < 0)
1249 goto error;
1250
1251next_ndp:
1252 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
1253 if (nframes < 0)
1254 goto error;
1255
1256 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1257
986e10d6 1258 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
5448d75f
BM		 1259 netif_dbg(dev, rx_err, dev->net,
1260 "invalid DPT16 signature <%#010x>\n",
1261 le32_to_cpu(ndp16->dwSignature));
ff06ab13
BM		 1262 goto err_ndp;
1263 }
1264 dpe16 = ndp16->dpe16;
900d495a 1265
d5ddb4a5
AO		 1266 for (x = 0; x < nframes; x++, dpe16++) {
1267 offset = le16_to_cpu(dpe16->wDatagramIndex);
1268 len = le16_to_cpu(dpe16->wDatagramLength);
900d495a
AO		 1269
1270 /*
1271 * CDC NCM ch. 3.7
1272 * All entries after first NULL entry are to be ignored
1273 */
d5ddb4a5 1274 if ((offset == 0) || (len == 0)) {
900d495a 1275 if (!x)
75d67d35 1276 goto err_ndp; /* empty NTB */
900d495a
AO		 1277 break;
1278 }
1279
1280 /* sanity checking */
d5ddb4a5
AO		 1281 if (((offset + len) > skb_in->len) ||
1282 (len > ctx->rx_max) || (len < ETH_HLEN)) {
ae223cd4
BM		 1283 netif_dbg(dev, rx_err, dev->net,
1284 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
1285 x, offset, len, skb_in);
900d495a 1286 if (!x)
75d67d35 1287 goto err_ndp;
900d495a
AO		 1288 break;
1289
1290 } else {
1291 skb = skb_clone(skb_in, GFP_ATOMIC);
9e56790a
JJ		 1292 if (!skb)
1293 goto error;
d5ddb4a5 1294 skb->len = len;
900d495a 1295 skb->data = ((u8 *)skb_in->data) + offset;
d5ddb4a5 1296 skb_set_tail_pointer(skb, len);
900d495a 1297 usbnet_skb_return(dev, skb);
beeecd42 1298 payload += len; /* count payload bytes in this NTB */
900d495a
AO		 1299 }
1300 }
75d67d35
BM		 1301err_ndp:
1302 /* are there more NDPs to process? */
1303 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1304 if (ndpoffset && loopcount--)
1305 goto next_ndp;
1306
beeecd42
BM		 1307 /* update stats */
1308 ctx->rx_overhead += skb_in->len - payload;
1309 ctx->rx_ntbs++;
1310
900d495a
AO		 1311 return 1;
1312error:
1313 return 0;
1314}
2f69702c 1315EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
900d495a
AO		 1316
1317static void
bed6f762 1318cdc_ncm_speed_change(struct usbnet *dev,
84e77a8b 1319 struct usb_cdc_speed_change *data)
900d495a 1320{
84e77a8b
AO		 1321 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1322 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
900d495a
AO		 1323
1324 /*
1325 * Currently the USB-NET API does not support reporting the actual
1326 * device speed. Do print it instead.
1327 */
f3028c52 1328 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
ae223cd4 1329 netif_info(dev, link, dev->net,
916f7640
BM		 1330 "%u mbit/s downlink %u mbit/s uplink\n",
1331 (unsigned int)(rx_speed / 1000000U),
1332 (unsigned int)(tx_speed / 1000000U));
f3028c52 1333 } else {
ae223cd4 1334 netif_info(dev, link, dev->net,
916f7640
BM		 1335 "%u kbit/s downlink %u kbit/s uplink\n",
1336 (unsigned int)(rx_speed / 1000U),
1337 (unsigned int)(tx_speed / 1000U));
900d495a
AO		 1338 }
1339}
1340
1341static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1342{
1343 struct cdc_ncm_ctx *ctx;
1344 struct usb_cdc_notification *event;
1345
1346 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1347
1348 if (urb->actual_length < sizeof(*event))
1349 return;
1350
1351 /* test for split data in 8-byte chunks */
1352 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
bed6f762 1353 cdc_ncm_speed_change(dev,
84e77a8b 1354 (struct usb_cdc_speed_change *)urb->transfer_buffer);
900d495a
AO		 1355 return;
1356 }
1357
1358 event = urb->transfer_buffer;
1359
1360 switch (event->bNotificationType) {
1361 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1362 /*
1363 * According to the CDC NCM specification ch.7.1
1364 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1365 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1366 */
1a7c6cc6 1367 ctx->connected = le16_to_cpu(event->wValue);
ae223cd4
BM		 1368 netif_info(dev, link, dev->net,
1369 "network connection: %sconnected\n",
1370 ctx->connected ? "" : "dis");
8a34b0ae 1371 usbnet_link_change(dev, ctx->connected, 0);
900d495a
AO		 1372 break;
1373
1374 case USB_CDC_NOTIFY_SPEED_CHANGE:
84e77a8b
AO		 1375 if (urb->actual_length < (sizeof(*event) +
1376 sizeof(struct usb_cdc_speed_change)))
900d495a
AO		 1377 set_bit(EVENT_STS_SPLIT, &dev->flags);
1378 else
bed6f762
BM		 1379 cdc_ncm_speed_change(dev,
1380 (struct usb_cdc_speed_change *)&event[1]);
900d495a
AO		 1381 break;
1382
1383 default:
67a36606
BM		 1384 dev_dbg(&dev->udev->dev,
1385 "NCM: unexpected notification 0x%02x!\n",
1386 event->bNotificationType);
900d495a
AO		 1387 break;
1388 }
1389}
1390
1391static int cdc_ncm_check_connect(struct usbnet *dev)
1392{
1393 struct cdc_ncm_ctx *ctx;
1394
1395 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1396 if (ctx == NULL)
1397 return 1; /* disconnected */
1398
1399 return !ctx->connected;
1400}
1401
900d495a
AO		 1402static const struct driver_info cdc_ncm_info = {
1403 .description = "CDC NCM",
c261344d 1404 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
900d495a
AO		 1405 .bind = cdc_ncm_bind,
1406 .unbind = cdc_ncm_unbind,
1407 .check_connect = cdc_ncm_check_connect,
a5e40708 1408 .manage_power = usbnet_manage_power,
900d495a
AO		 1409 .status = cdc_ncm_status,
1410 .rx_fixup = cdc_ncm_rx_fixup,
1411 .tx_fixup = cdc_ncm_tx_fixup,
1412};
1413
f94898ea
DW		 1414/* Same as cdc_ncm_info, but with FLAG_WWAN */
1415static const struct driver_info wwan_info = {
1416 .description = "Mobile Broadband Network Device",
1417 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1418 | FLAG_WWAN,
1419 .bind = cdc_ncm_bind,
1420 .unbind = cdc_ncm_unbind,
1421 .check_connect = cdc_ncm_check_connect,
a5e40708 1422 .manage_power = usbnet_manage_power,
f94898ea
DW		 1423 .status = cdc_ncm_status,
1424 .rx_fixup = cdc_ncm_rx_fixup,
1425 .tx_fixup = cdc_ncm_tx_fixup,
1426};
1427
2f62d5aa
WS		 1428/* Same as wwan_info, but with FLAG_NOARP */
1429static const struct driver_info wwan_noarp_info = {
1430 .description = "Mobile Broadband Network Device (NO ARP)",
1431 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1432 | FLAG_WWAN | FLAG_NOARP,
1433 .bind = cdc_ncm_bind,
1434 .unbind = cdc_ncm_unbind,
1435 .check_connect = cdc_ncm_check_connect,
1436 .manage_power = usbnet_manage_power,
1437 .status = cdc_ncm_status,
1438 .rx_fixup = cdc_ncm_rx_fixup,
1439 .tx_fixup = cdc_ncm_tx_fixup,
1440};
1441
f94898ea
DW		 1442static const struct usb_device_id cdc_devs[] = {
1443 /* Ericsson MBM devices like F5521gw */
1444 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1445 | USB_DEVICE_ID_MATCH_VENDOR,
1446 .idVendor = 0x0bdb,
1447 .bInterfaceClass = USB_CLASS_COMM,
1448 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1449 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1450 .driver_info = (unsigned long) &wwan_info,
1451 },
1452
f3a1ef9c
PM		 1453 /* Dell branded MBM devices like DW5550 */
1454 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1455 | USB_DEVICE_ID_MATCH_VENDOR,
1456 .idVendor = 0x413c,
1457 .bInterfaceClass = USB_CLASS_COMM,
1458 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1459 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1460 .driver_info = (unsigned long) &wwan_info,
1461 },
1462
1463 /* Toshiba branded MBM devices */
1464 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1465 | USB_DEVICE_ID_MATCH_VENDOR,
1466 .idVendor = 0x0930,
1467 .bInterfaceClass = USB_CLASS_COMM,
1468 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1469 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1470 .driver_info = (unsigned long) &wwan_info,
1471 },
1472
1f84eab4
BM		 1473 /* tag Huawei devices as wwan */
1474 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1475 USB_CLASS_COMM,
1476 USB_CDC_SUBCLASS_NCM,
1477 USB_CDC_PROTO_NONE),
1478 .driver_info = (unsigned long)&wwan_info,
1479 },
1480
2f62d5aa
WS		 1481 /* Infineon(now Intel) HSPA Modem platform */
1482 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1483 USB_CLASS_COMM,
1484 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1485 .driver_info = (unsigned long)&wwan_noarp_info,
1486 },
1487
f94898ea
DW		 1488 /* Generic CDC-NCM devices */
1489 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1490 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1491 .driver_info = (unsigned long)&cdc_ncm_info,
1492 },
1493 {
1494 },
1495};
1496MODULE_DEVICE_TABLE(usb, cdc_devs);
1497
900d495a
AO		 1498static struct usb_driver cdc_ncm_driver = {
1499 .name = "cdc_ncm",
1500 .id_table = cdc_devs,
085e50e1
BM		 1501 .probe = usbnet_probe,
1502 .disconnect = usbnet_disconnect,
900d495a
AO		 1503 .suspend = usbnet_suspend,
1504 .resume = usbnet_resume,
85e3c65f 1505 .reset_resume = usbnet_resume,
900d495a 1506 .supports_autosuspend = 1,
e1f12eb6 1507 .disable_hub_initiated_lpm = 1,
900d495a
AO		 1508};
1509
d632eb1b 1510module_usb_driver(cdc_ncm_driver);
900d495a
AO		 1511
1512MODULE_AUTHOR("Hans Petter Selasky");
1513MODULE_DESCRIPTION("USB CDC NCM host driver");
1514MODULE_LICENSE("Dual BSD/GPL");
Linux 6.x block layer and io_uring tree(s)