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