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