Commit | Line | Data |
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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> | |
42 | #include <linux/init.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/ctype.h> | |
45 | #include <linux/ethtool.h> | |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/mii.h> | |
48 | #include <linux/crc32.h> | |
49 | #include <linux/usb.h> | |
c84ff1d6 | 50 | #include <linux/hrtimer.h> |
900d495a AO |
51 | #include <linux/atomic.h> |
52 | #include <linux/usb/usbnet.h> | |
53 | #include <linux/usb/cdc.h> | |
c91ce3b6 | 54 | #include <linux/usb/cdc_ncm.h> |
900d495a | 55 | |
1e8bbe6c BM |
56 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
57 | static bool prefer_mbim = true; | |
58 | #else | |
59 | static bool prefer_mbim; | |
60 | #endif | |
61 | module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); | |
62 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); | |
63 | ||
c84ff1d6 AO |
64 | static void cdc_ncm_txpath_bh(unsigned long param); |
65 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); | |
66 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 67 | static struct usb_driver cdc_ncm_driver; |
900d495a | 68 | |
bed6f762 | 69 | static u8 cdc_ncm_setup(struct usbnet *dev) |
900d495a | 70 | { |
bed6f762 | 71 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
6a9612e2 | 72 | struct usb_cdc_ncm_ntb_parameters ncm_parm; |
900d495a | 73 | u32 val; |
900d495a AO |
74 | u8 flags; |
75 | u8 iface_no; | |
76 | int err; | |
2d1c4310 | 77 | int eth_hlen; |
84e77a8b | 78 | u16 ntb_fmt_supported; |
47175e5f | 79 | __le16 max_datagram_size; |
900d495a AO |
80 | |
81 | iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
82 | ||
90b8b037 ML |
83 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
84 | USB_TYPE_CLASS | USB_DIR_IN | |
85 | |USB_RECIP_INTERFACE, | |
6a9612e2 BM |
86 | 0, iface_no, &ncm_parm, |
87 | sizeof(ncm_parm)); | |
36c35416 | 88 | if (err < 0) { |
59ede316 BM |
89 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
90 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
91 | } |
92 | ||
93 | /* read correct set of parameters according to device mode */ | |
6a9612e2 BM |
94 | ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize); |
95 | ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize); | |
96 | ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder); | |
97 | ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor); | |
98 | ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment); | |
84e77a8b | 99 | /* devices prior to NCM Errata shall set this field to zero */ |
6a9612e2 BM |
100 | ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams); |
101 | ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported); | |
900d495a | 102 | |
47175e5f BM |
103 | /* there are some minor differences in NCM and MBIM defaults */ |
104 | if (cdc_ncm_comm_intf_is_mbim(ctx->control->cur_altsetting)) { | |
105 | if (!ctx->mbim_desc) | |
106 | return -EINVAL; | |
2d1c4310 | 107 | eth_hlen = 0; |
47175e5f BM |
108 | flags = ctx->mbim_desc->bmNetworkCapabilities; |
109 | ctx->max_datagram_size = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
110 | if (ctx->max_datagram_size < CDC_MBIM_MIN_DATAGRAM_SIZE) | |
111 | ctx->max_datagram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; | |
2d1c4310 | 112 | } else { |
47175e5f BM |
113 | if (!ctx->func_desc) |
114 | return -EINVAL; | |
115 | eth_hlen = ETH_HLEN; | |
116 | flags = ctx->func_desc->bmNetworkCapabilities; | |
117 | ctx->max_datagram_size = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
118 | if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) | |
119 | ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; | |
2d1c4310 | 120 | } |
900d495a | 121 | |
47175e5f BM |
122 | /* common absolute max for NCM and MBIM */ |
123 | if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) | |
124 | ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; | |
125 | ||
ae223cd4 BM |
126 | dev_dbg(&dev->intf->dev, |
127 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
128 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
129 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); | |
900d495a | 130 | |
84e77a8b AO |
131 | /* max count of tx datagrams */ |
132 | if ((ctx->tx_max_datagrams == 0) || | |
133 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
134 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a AO |
135 | |
136 | /* verify maximum size of received NTB in bytes */ | |
84e77a8b | 137 | if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { |
ae223cd4 BM |
138 | dev_dbg(&dev->intf->dev, "Using min receive length=%d\n", |
139 | USB_CDC_NCM_NTB_MIN_IN_SIZE); | |
84e77a8b AO |
140 | ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; |
141 | } | |
142 | ||
143 | if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { | |
ae223cd4 BM |
144 | dev_dbg(&dev->intf->dev, "Using default maximum receive length=%d\n", |
145 | CDC_NCM_NTB_MAX_SIZE_RX); | |
900d495a AO |
146 | ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; |
147 | } | |
148 | ||
84e77a8b | 149 | /* inform device about NTB input size changes */ |
6a9612e2 | 150 | if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) { |
90b8b037 | 151 | __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); |
84e77a8b | 152 | |
90b8b037 ML |
153 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
154 | USB_TYPE_CLASS | USB_DIR_OUT | |
155 | | USB_RECIP_INTERFACE, | |
156 | 0, iface_no, &dwNtbInMaxSize, 4); | |
36c35416 | 157 | if (err < 0) |
ae223cd4 | 158 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); |
84e77a8b AO |
159 | } |
160 | ||
900d495a | 161 | /* verify maximum size of transmitted NTB in bytes */ |
47175e5f | 162 | if ((ctx->tx_max < (CDC_NCM_MIN_HDR_SIZE + ctx->max_datagram_size)) || |
900d495a | 163 | (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { |
ae223cd4 BM |
164 | dev_dbg(&dev->intf->dev, "Using default maximum transmit length=%d\n", |
165 | CDC_NCM_NTB_MAX_SIZE_TX); | |
900d495a | 166 | ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; |
6a9612e2 BM |
167 | |
168 | /* Adding a pad byte here simplifies the handling in | |
169 | * cdc_ncm_fill_tx_frame, by making tx_max always | |
170 | * represent the real skb max size. | |
171 | */ | |
172 | if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0) | |
173 | ctx->tx_max++; | |
174 | ||
900d495a AO |
175 | } |
176 | ||
177 | /* | |
178 | * verify that the structure alignment is: | |
179 | * - power of two | |
180 | * - not greater than the maximum transmit length | |
181 | * - not less than four bytes | |
182 | */ | |
183 | val = ctx->tx_ndp_modulus; | |
184 | ||
185 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
186 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 187 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
188 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
189 | } | |
190 | ||
191 | /* | |
192 | * verify that the payload alignment is: | |
193 | * - power of two | |
194 | * - not greater than the maximum transmit length | |
195 | * - not less than four bytes | |
196 | */ | |
197 | val = ctx->tx_modulus; | |
198 | ||
199 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
200 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 201 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
202 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
203 | } | |
204 | ||
205 | /* verify the payload remainder */ | |
206 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 207 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
208 | ctx->tx_remainder = 0; |
209 | } | |
210 | ||
211 | /* adjust TX-remainder according to NCM specification. */ | |
2d1c4310 GS |
212 | ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & |
213 | (ctx->tx_modulus - 1)); | |
900d495a AO |
214 | |
215 | /* additional configuration */ | |
216 | ||
217 | /* set CRC Mode */ | |
84e77a8b | 218 | if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { |
90b8b037 ML |
219 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, |
220 | USB_TYPE_CLASS | USB_DIR_OUT | |
221 | | USB_RECIP_INTERFACE, | |
222 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
223 | iface_no, NULL, 0); | |
36c35416 | 224 | if (err < 0) |
ae223cd4 | 225 | dev_dbg(&dev->intf->dev, "Setting CRC mode off failed\n"); |
84e77a8b | 226 | } |
900d495a | 227 | |
84e77a8b AO |
228 | /* set NTB format, if both formats are supported */ |
229 | if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { | |
90b8b037 ML |
230 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, |
231 | USB_TYPE_CLASS | USB_DIR_OUT | |
232 | | USB_RECIP_INTERFACE, | |
233 | USB_CDC_NCM_NTB16_FORMAT, | |
234 | iface_no, NULL, 0); | |
36c35416 | 235 | if (err < 0) |
ae223cd4 | 236 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit failed\n"); |
84e77a8b | 237 | } |
900d495a | 238 | |
47175e5f BM |
239 | /* inform the device about the selected Max Datagram Size */ |
240 | if (!(flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
241 | goto out; | |
242 | ||
243 | /* read current mtu value from device */ | |
244 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
245 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
246 | 0, iface_no, &max_datagram_size, 2); | |
247 | if (err < 0) { | |
248 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); | |
249 | goto out; | |
900d495a AO |
250 | } |
251 | ||
47175e5f BM |
252 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) |
253 | goto out; | |
254 | ||
255 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
256 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
257 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
258 | 0, iface_no, &max_datagram_size, 2); | |
259 | if (err < 0) | |
260 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
900d495a | 261 | |
47175e5f BM |
262 | out: |
263 | /* set MTU to max supported by the device if necessary */ | |
264 | if (dev->net->mtu > ctx->max_datagram_size - eth_hlen) | |
265 | dev->net->mtu = ctx->max_datagram_size - eth_hlen; | |
900d495a AO |
266 | return 0; |
267 | } | |
268 | ||
269 | static void | |
ff1632aa | 270 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 271 | { |
ff1632aa | 272 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
273 | u8 ep; |
274 | ||
275 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
276 | ||
277 | e = intf->cur_altsetting->endpoint + ep; | |
278 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
279 | case USB_ENDPOINT_XFER_INT: | |
280 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
281 | if (!dev->status) |
282 | dev->status = e; | |
900d495a AO |
283 | } |
284 | break; | |
285 | ||
286 | case USB_ENDPOINT_XFER_BULK: | |
287 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
288 | if (!in) |
289 | in = e; | |
900d495a | 290 | } else { |
ff1632aa BM |
291 | if (!out) |
292 | out = e; | |
900d495a AO |
293 | } |
294 | break; | |
295 | ||
296 | default: | |
297 | break; | |
298 | } | |
299 | } | |
ff1632aa BM |
300 | if (in && !dev->in) |
301 | dev->in = usb_rcvbulkpipe(dev->udev, | |
302 | in->desc.bEndpointAddress & | |
303 | USB_ENDPOINT_NUMBER_MASK); | |
304 | if (out && !dev->out) | |
305 | dev->out = usb_sndbulkpipe(dev->udev, | |
306 | out->desc.bEndpointAddress & | |
307 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
308 | } |
309 | ||
310 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
311 | { | |
312 | if (ctx == NULL) | |
313 | return; | |
314 | ||
900d495a AO |
315 | if (ctx->tx_rem_skb != NULL) { |
316 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
317 | ctx->tx_rem_skb = NULL; | |
318 | } | |
319 | ||
320 | if (ctx->tx_curr_skb != NULL) { | |
321 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
322 | ctx->tx_curr_skb = NULL; | |
323 | } | |
324 | ||
325 | kfree(ctx); | |
326 | } | |
327 | ||
c91ce3b6 | 328 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) |
900d495a | 329 | { |
83292236 | 330 | const struct usb_cdc_union_desc *union_desc = NULL; |
900d495a AO |
331 | struct cdc_ncm_ctx *ctx; |
332 | struct usb_driver *driver; | |
333 | u8 *buf; | |
334 | int len; | |
335 | int temp; | |
336 | u8 iface_no; | |
337 | ||
c796984f | 338 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
339 | if (!ctx) |
340 | return -ENOMEM; | |
900d495a | 341 | |
c84ff1d6 AO |
342 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
343 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
bed6f762 | 344 | ctx->bh.data = (unsigned long)dev; |
c84ff1d6 AO |
345 | ctx->bh.func = cdc_ncm_txpath_bh; |
346 | atomic_set(&ctx->stop, 0); | |
900d495a | 347 | spin_lock_init(&ctx->mtx); |
900d495a AO |
348 | |
349 | /* store ctx pointer in device data field */ | |
350 | dev->data[0] = (unsigned long)ctx; | |
351 | ||
9fe0234c BM |
352 | /* only the control interface can be successfully probed */ |
353 | ctx->control = intf; | |
354 | ||
900d495a AO |
355 | /* get some pointers */ |
356 | driver = driver_of(intf); | |
357 | buf = intf->cur_altsetting->extra; | |
358 | len = intf->cur_altsetting->extralen; | |
359 | ||
900d495a AO |
360 | /* parse through descriptors associated with control interface */ |
361 | while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { | |
362 | ||
363 | if (buf[1] != USB_DT_CS_INTERFACE) | |
364 | goto advance; | |
365 | ||
366 | switch (buf[2]) { | |
367 | case USB_CDC_UNION_TYPE: | |
83292236 | 368 | if (buf[0] < sizeof(*union_desc)) |
900d495a AO |
369 | break; |
370 | ||
83292236 | 371 | union_desc = (const struct usb_cdc_union_desc *)buf; |
9fe0234c BM |
372 | /* the master must be the interface we are probing */ |
373 | if (intf->cur_altsetting->desc.bInterfaceNumber != | |
296e81f8 BM |
374 | union_desc->bMasterInterface0) { |
375 | dev_dbg(&intf->dev, "bogus CDC Union\n"); | |
9fe0234c | 376 | goto error; |
296e81f8 | 377 | } |
900d495a | 378 | ctx->data = usb_ifnum_to_if(dev->udev, |
83292236 | 379 | union_desc->bSlaveInterface0); |
900d495a AO |
380 | break; |
381 | ||
382 | case USB_CDC_ETHERNET_TYPE: | |
383 | if (buf[0] < sizeof(*(ctx->ether_desc))) | |
384 | break; | |
385 | ||
386 | ctx->ether_desc = | |
387 | (const struct usb_cdc_ether_desc *)buf; | |
900d495a AO |
388 | break; |
389 | ||
390 | case USB_CDC_NCM_TYPE: | |
391 | if (buf[0] < sizeof(*(ctx->func_desc))) | |
392 | break; | |
393 | ||
394 | ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; | |
395 | break; | |
396 | ||
38396e4c GS |
397 | case USB_CDC_MBIM_TYPE: |
398 | if (buf[0] < sizeof(*(ctx->mbim_desc))) | |
399 | break; | |
400 | ||
401 | ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; | |
402 | break; | |
403 | ||
900d495a AO |
404 | default: |
405 | break; | |
406 | } | |
407 | advance: | |
408 | /* advance to next descriptor */ | |
409 | temp = buf[0]; | |
410 | buf += temp; | |
411 | len -= temp; | |
412 | } | |
413 | ||
9992c2e2 | 414 | /* some buggy devices have an IAD but no CDC Union */ |
83292236 | 415 | if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
416 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
417 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
418 | } |
419 | ||
900d495a | 420 | /* check if we got everything */ |
296e81f8 BM |
421 | if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) { |
422 | dev_dbg(&intf->dev, "CDC descriptors missing\n"); | |
900d495a | 423 | goto error; |
296e81f8 | 424 | } |
900d495a | 425 | |
bbc8d922 BM |
426 | /* claim data interface, if different from control */ |
427 | if (ctx->data != ctx->control) { | |
428 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 BM |
429 | if (temp) { |
430 | dev_dbg(&intf->dev, "failed to claim data intf\n"); | |
bbc8d922 | 431 | goto error; |
296e81f8 | 432 | } |
bbc8d922 | 433 | } |
900d495a AO |
434 | |
435 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
436 | ||
437 | /* reset data interface */ | |
438 | temp = usb_set_interface(dev->udev, iface_no, 0); | |
296e81f8 BM |
439 | if (temp) { |
440 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 441 | goto error2; |
296e81f8 | 442 | } |
900d495a | 443 | |
900d495a | 444 | /* configure data interface */ |
38396e4c | 445 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
446 | if (temp) { |
447 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 448 | goto error2; |
296e81f8 | 449 | } |
900d495a | 450 | |
ff1632aa BM |
451 | cdc_ncm_find_endpoints(dev, ctx->data); |
452 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
453 | if (!dev->in || !dev->out || !dev->status) { |
454 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 455 | goto error2; |
296e81f8 | 456 | } |
900d495a | 457 | |
6a9612e2 | 458 | /* initialize data interface */ |
296e81f8 BM |
459 | if (cdc_ncm_setup(dev)) { |
460 | dev_dbg(&intf->dev, "cdc_ncm_setup() failed\n"); | |
6a9612e2 | 461 | goto error2; |
296e81f8 | 462 | } |
6a9612e2 | 463 | |
900d495a AO |
464 | usb_set_intfdata(ctx->data, dev); |
465 | usb_set_intfdata(ctx->control, dev); | |
900d495a | 466 | |
38396e4c GS |
467 | if (ctx->ether_desc) { |
468 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 BM |
469 | if (temp) { |
470 | dev_dbg(&intf->dev, "failed to get mac address\n"); | |
38396e4c | 471 | goto error2; |
296e81f8 BM |
472 | } |
473 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 474 | } |
900d495a | 475 | |
43c87f78 BM |
476 | /* usbnet use these values for sizing tx/rx queues */ |
477 | dev->hard_mtu = ctx->tx_max; | |
900d495a AO |
478 | dev->rx_urb_size = ctx->rx_max; |
479 | ||
900d495a AO |
480 | return 0; |
481 | ||
19694ac8 AO |
482 | error2: |
483 | usb_set_intfdata(ctx->control, NULL); | |
484 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
485 | if (ctx->data != ctx->control) |
486 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
487 | error: |
488 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
489 | dev->data[0] = 0; | |
296e81f8 | 490 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
491 | return -ENODEV; |
492 | } | |
c91ce3b6 | 493 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 494 | |
c91ce3b6 | 495 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
496 | { |
497 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 498 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
499 | |
500 | if (ctx == NULL) | |
501 | return; /* no setup */ | |
502 | ||
c84ff1d6 AO |
503 | atomic_set(&ctx->stop, 1); |
504 | ||
505 | if (hrtimer_active(&ctx->tx_timer)) | |
506 | hrtimer_cancel(&ctx->tx_timer); | |
507 | ||
508 | tasklet_kill(&ctx->bh); | |
509 | ||
bbc8d922 BM |
510 | /* handle devices with combined control and data interface */ |
511 | if (ctx->control == ctx->data) | |
512 | ctx->data = NULL; | |
513 | ||
19694ac8 AO |
514 | /* disconnect master --> disconnect slave */ |
515 | if (intf == ctx->control && ctx->data) { | |
516 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 517 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 518 | ctx->data = NULL; |
900d495a | 519 | |
19694ac8 AO |
520 | } else if (intf == ctx->data && ctx->control) { |
521 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 522 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 523 | ctx->control = NULL; |
900d495a AO |
524 | } |
525 | ||
3e515665 | 526 | usb_set_intfdata(intf, NULL); |
900d495a AO |
527 | cdc_ncm_free(ctx); |
528 | } | |
c91ce3b6 | 529 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 530 | |
1e8bbe6c BM |
531 | /* Select the MBIM altsetting iff it is preferred and available, |
532 | * returning the number of the corresponding data interface altsetting | |
533 | */ | |
534 | u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) | |
38396e4c | 535 | { |
1e8bbe6c | 536 | struct usb_host_interface *alt; |
38396e4c | 537 | |
bd329e12 BM |
538 | /* The MBIM spec defines a NCM compatible default altsetting, |
539 | * which we may have matched: | |
540 | * | |
541 | * "Functions that implement both NCM 1.0 and MBIM (an | |
542 | * “NCM/MBIM function”) according to this recommendation | |
543 | * shall provide two alternate settings for the | |
544 | * Communication Interface. Alternate setting 0, and the | |
545 | * associated class and endpoint descriptors, shall be | |
546 | * constructed according to the rules given for the | |
547 | * Communication Interface in section 5 of [USBNCM10]. | |
548 | * Alternate setting 1, and the associated class and | |
549 | * endpoint descriptors, shall be constructed according to | |
550 | * the rules given in section 6 (USB Device Model) of this | |
551 | * specification." | |
bd329e12 | 552 | */ |
1e8bbe6c BM |
553 | if (prefer_mbim && intf->num_altsetting == 2) { |
554 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); | |
555 | if (alt && cdc_ncm_comm_intf_is_mbim(alt) && | |
556 | !usb_set_interface(dev->udev, | |
557 | intf->cur_altsetting->desc.bInterfaceNumber, | |
558 | CDC_NCM_COMM_ALTSETTING_MBIM)) | |
559 | return CDC_NCM_DATA_ALTSETTING_MBIM; | |
f350ca03 | 560 | } |
1e8bbe6c BM |
561 | return CDC_NCM_DATA_ALTSETTING_NCM; |
562 | } | |
563 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
564 | ||
565 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
566 | { | |
567 | int ret; | |
568 | ||
569 | /* MBIM backwards compatible function? */ | |
570 | cdc_ncm_select_altsetting(dev, intf); | |
571 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) | |
572 | return -ENODEV; | |
bd329e12 | 573 | |
38396e4c GS |
574 | /* NCM data altsetting is always 1 */ |
575 | ret = cdc_ncm_bind_common(dev, intf, 1); | |
576 | ||
577 | /* | |
578 | * We should get an event when network connection is "connected" or | |
579 | * "disconnected". Set network connection in "disconnected" state | |
580 | * (carrier is OFF) during attach, so the IP network stack does not | |
581 | * start IPv6 negotiation and more. | |
582 | */ | |
8a34b0ae | 583 | usbnet_link_change(dev, 0, 0); |
38396e4c GS |
584 | return ret; |
585 | } | |
586 | ||
c78b7c58 | 587 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 588 | { |
c78b7c58 BM |
589 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
590 | ||
591 | if (skb->len + align > max) | |
592 | align = max - skb->len; | |
593 | if (align && skb_tailroom(skb) >= align) | |
594 | memset(skb_put(skb, align), 0, align); | |
595 | } | |
596 | ||
597 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
598 | * allocating a new one within skb | |
599 | */ | |
600 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) | |
601 | { | |
602 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
603 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
604 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
605 | ||
606 | /* follow the chain of NDPs, looking for a match */ | |
607 | while (ndpoffset) { | |
608 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
609 | if (ndp16->dwSignature == sign) | |
610 | return ndp16; | |
611 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
612 | } | |
613 | ||
614 | /* align new NDP */ | |
615 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); | |
616 | ||
617 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
618 | if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) | |
619 | return NULL; | |
620 | ||
621 | /* link to it */ | |
622 | if (ndp16) | |
623 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
624 | else | |
625 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
626 | ||
627 | /* push a new empty NDP */ | |
628 | ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); | |
629 | ndp16->dwSignature = sign; | |
630 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
631 | return ndp16; | |
900d495a AO |
632 | } |
633 | ||
c91ce3b6 | 634 | struct sk_buff * |
bed6f762 | 635 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 636 | { |
bed6f762 | 637 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
c78b7c58 BM |
638 | struct usb_cdc_ncm_nth16 *nth16; |
639 | struct usb_cdc_ncm_ndp16 *ndp16; | |
900d495a | 640 | struct sk_buff *skb_out; |
c78b7c58 | 641 | u16 n = 0, index, ndplen; |
84e77a8b | 642 | u8 ready2send = 0; |
900d495a AO |
643 | |
644 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 645 | if (skb != NULL) { |
900d495a | 646 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
647 | swap(sign, ctx->tx_rem_sign); |
648 | } else { | |
84e77a8b | 649 | ready2send = 1; |
c78b7c58 | 650 | } |
900d495a AO |
651 | |
652 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 653 | skb_out = ctx->tx_curr_skb; |
900d495a | 654 | |
c78b7c58 BM |
655 | /* allocate a new OUT skb */ |
656 | if (!skb_out) { | |
20572226 | 657 | skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); |
900d495a AO |
658 | if (skb_out == NULL) { |
659 | if (skb != NULL) { | |
660 | dev_kfree_skb_any(skb); | |
bed6f762 | 661 | dev->net->stats.tx_dropped++; |
900d495a AO |
662 | } |
663 | goto exit_no_skb; | |
664 | } | |
c78b7c58 BM |
665 | /* fill out the initial 16-bit NTB header */ |
666 | nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); | |
667 | nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
668 | nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
669 | nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
900d495a | 670 | |
c78b7c58 | 671 | /* count total number of frames in this NTB */ |
900d495a AO |
672 | ctx->tx_curr_frame_num = 0; |
673 | } | |
674 | ||
c78b7c58 BM |
675 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
676 | /* send any remaining skb first */ | |
900d495a AO |
677 | if (skb == NULL) { |
678 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 679 | sign = ctx->tx_rem_sign; |
900d495a AO |
680 | ctx->tx_rem_skb = NULL; |
681 | ||
682 | /* check for end of skb */ | |
683 | if (skb == NULL) | |
684 | break; | |
685 | } | |
686 | ||
c78b7c58 BM |
687 | /* get the appropriate NDP for this skb */ |
688 | ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
689 | ||
690 | /* align beginning of next frame */ | |
691 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); | |
692 | ||
693 | /* check if we had enough room left for both NDP and frame */ | |
694 | if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { | |
900d495a AO |
695 | if (n == 0) { |
696 | /* won't fit, MTU problem? */ | |
697 | dev_kfree_skb_any(skb); | |
698 | skb = NULL; | |
bed6f762 | 699 | dev->net->stats.tx_dropped++; |
900d495a AO |
700 | } else { |
701 | /* no room for skb - store for later */ | |
702 | if (ctx->tx_rem_skb != NULL) { | |
703 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 704 | dev->net->stats.tx_dropped++; |
900d495a AO |
705 | } |
706 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 707 | ctx->tx_rem_sign = sign; |
900d495a | 708 | skb = NULL; |
84e77a8b | 709 | ready2send = 1; |
900d495a AO |
710 | } |
711 | break; | |
712 | } | |
713 | ||
c78b7c58 BM |
714 | /* calculate frame number withing this NDP */ |
715 | ndplen = le16_to_cpu(ndp16->wLength); | |
716 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
900d495a | 717 | |
c78b7c58 BM |
718 | /* OK, add this skb */ |
719 | ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
720 | ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
721 | ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
722 | memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); | |
900d495a AO |
723 | dev_kfree_skb_any(skb); |
724 | skb = NULL; | |
c78b7c58 BM |
725 | |
726 | /* send now if this NDP is full */ | |
727 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
728 | ready2send = 1; | |
729 | break; | |
730 | } | |
900d495a AO |
731 | } |
732 | ||
733 | /* free up any dangling skb */ | |
734 | if (skb != NULL) { | |
735 | dev_kfree_skb_any(skb); | |
736 | skb = NULL; | |
bed6f762 | 737 | dev->net->stats.tx_dropped++; |
900d495a AO |
738 | } |
739 | ||
740 | ctx->tx_curr_frame_num = n; | |
741 | ||
742 | if (n == 0) { | |
743 | /* wait for more frames */ | |
744 | /* push variables */ | |
745 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
746 | goto exit_no_skb; |
747 | ||
84e77a8b | 748 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { |
900d495a AO |
749 | /* wait for more frames */ |
750 | /* push variables */ | |
751 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
752 | /* set the pending count */ |
753 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 754 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
755 | goto exit_no_skb; |
756 | ||
757 | } else { | |
758 | /* frame goes out */ | |
759 | /* variables will be reset at next call */ | |
760 | } | |
761 | ||
20572226 BM |
762 | /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT |
763 | * bytes, we send buffers as it is. If we get more data, it | |
764 | * would be more efficient for USB HS mobile device with DMA | |
765 | * engine to receive a full size NTB, than canceling DMA | |
766 | * transfer and receiving a short packet. | |
4d619f62 BM |
767 | * |
768 | * This optimization support is pointless if we end up sending | |
769 | * a ZLP after full sized NTBs. | |
900d495a | 770 | */ |
4d619f62 BM |
771 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
772 | skb_out->len > CDC_NCM_MIN_TX_PKT) | |
20572226 BM |
773 | memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, |
774 | ctx->tx_max - skb_out->len); | |
775 | else if ((skb_out->len % dev->maxpacket) == 0) | |
c78b7c58 | 776 | *skb_put(skb_out, 1) = 0; /* force short packet */ |
900d495a | 777 | |
c78b7c58 BM |
778 | /* set final frame length */ |
779 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
780 | nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
900d495a AO |
781 | |
782 | /* return skb */ | |
783 | ctx->tx_curr_skb = NULL; | |
bed6f762 | 784 | dev->net->stats.tx_packets += ctx->tx_curr_frame_num; |
900d495a AO |
785 | return skb_out; |
786 | ||
787 | exit_no_skb: | |
c84ff1d6 AO |
788 | /* Start timer, if there is a remaining skb */ |
789 | if (ctx->tx_curr_skb != NULL) | |
790 | cdc_ncm_tx_timeout_start(ctx); | |
900d495a AO |
791 | return NULL; |
792 | } | |
c91ce3b6 | 793 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
794 | |
795 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
796 | { | |
797 | /* start timer, if not already started */ | |
c84ff1d6 AO |
798 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
799 | hrtimer_start(&ctx->tx_timer, | |
800 | ktime_set(0, CDC_NCM_TIMER_INTERVAL), | |
801 | HRTIMER_MODE_REL); | |
900d495a AO |
802 | } |
803 | ||
c84ff1d6 | 804 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 805 | { |
c84ff1d6 AO |
806 | struct cdc_ncm_ctx *ctx = |
807 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 808 | |
c84ff1d6 AO |
809 | if (!atomic_read(&ctx->stop)) |
810 | tasklet_schedule(&ctx->bh); | |
811 | return HRTIMER_NORESTART; | |
812 | } | |
900d495a | 813 | |
c84ff1d6 AO |
814 | static void cdc_ncm_txpath_bh(unsigned long param) |
815 | { | |
bed6f762 BM |
816 | struct usbnet *dev = (struct usbnet *)param; |
817 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a | 818 | |
c84ff1d6 AO |
819 | spin_lock_bh(&ctx->mtx); |
820 | if (ctx->tx_timer_pending != 0) { | |
821 | ctx->tx_timer_pending--; | |
900d495a | 822 | cdc_ncm_tx_timeout_start(ctx); |
c84ff1d6 | 823 | spin_unlock_bh(&ctx->mtx); |
bed6f762 | 824 | } else if (dev->net != NULL) { |
c84ff1d6 | 825 | spin_unlock_bh(&ctx->mtx); |
bed6f762 BM |
826 | netif_tx_lock_bh(dev->net); |
827 | usbnet_start_xmit(NULL, dev->net); | |
828 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba BM |
829 | } else { |
830 | spin_unlock_bh(&ctx->mtx); | |
f742aa8a | 831 | } |
900d495a AO |
832 | } |
833 | ||
834 | static struct sk_buff * | |
835 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) | |
836 | { | |
837 | struct sk_buff *skb_out; | |
838 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
839 | |
840 | /* | |
841 | * The Ethernet API we are using does not support transmitting | |
842 | * multiple Ethernet frames in a single call. This driver will | |
843 | * accumulate multiple Ethernet frames and send out a larger | |
844 | * USB frame when the USB buffer is full or when a single jiffies | |
845 | * timeout happens. | |
846 | */ | |
847 | if (ctx == NULL) | |
848 | goto error; | |
849 | ||
c84ff1d6 | 850 | spin_lock_bh(&ctx->mtx); |
bed6f762 | 851 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); |
c84ff1d6 | 852 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
853 | return skb_out; |
854 | ||
855 | error: | |
856 | if (skb != NULL) | |
857 | dev_kfree_skb_any(skb); | |
858 | ||
859 | return NULL; | |
860 | } | |
861 | ||
ff06ab13 | 862 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 863 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 864 | { |
ae223cd4 | 865 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 866 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
867 | int len; |
868 | int ret = -EINVAL; | |
900d495a | 869 | |
900d495a AO |
870 | if (ctx == NULL) |
871 | goto error; | |
872 | ||
d5ddb4a5 AO |
873 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
874 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 875 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
876 | goto error; |
877 | } | |
878 | ||
d5ddb4a5 | 879 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 880 | |
986e10d6 | 881 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
882 | netif_dbg(dev, rx_err, dev->net, |
883 | "invalid NTH16 signature <%#010x>\n", | |
884 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
885 | goto error; |
886 | } | |
887 | ||
d5ddb4a5 AO |
888 | len = le16_to_cpu(nth16->wBlockLength); |
889 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
890 | netif_dbg(dev, rx_err, dev->net, |
891 | "unsupported NTB block length %u/%u\n", len, | |
892 | ctx->rx_max); | |
900d495a AO |
893 | goto error; |
894 | } | |
895 | ||
d5ddb4a5 | 896 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
897 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
898 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
899 | netif_dbg(dev, rx_err, dev->net, | |
900 | "sequence number glitch prev=%d curr=%d\n", | |
901 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
902 | } |
903 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
904 | ||
ff06ab13 BM |
905 | ret = le16_to_cpu(nth16->wNdpIndex); |
906 | error: | |
907 | return ret; | |
908 | } | |
c91ce3b6 | 909 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 BM |
910 | |
911 | /* verify NDP header and return number of datagrams, or negative error */ | |
c91ce3b6 | 912 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 913 | { |
ae223cd4 | 914 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
915 | struct usb_cdc_ncm_ndp16 *ndp16; |
916 | int ret = -EINVAL; | |
917 | ||
75d67d35 | 918 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
919 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
920 | ndpoffset); | |
900d495a AO |
921 | goto error; |
922 | } | |
75d67d35 | 923 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 924 | |
d5ddb4a5 | 925 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
926 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
927 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 928 | goto error; |
900d495a AO |
929 | } |
930 | ||
ff06ab13 | 931 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
932 | sizeof(struct usb_cdc_ncm_ndp16)) / |
933 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 934 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 935 | |
ae223cd4 BM |
936 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
937 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
938 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 939 | ret = -EINVAL; |
900d495a AO |
940 | } |
941 | ||
ff06ab13 BM |
942 | error: |
943 | return ret; | |
944 | } | |
c91ce3b6 | 945 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 BM |
946 | |
947 | static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) | |
948 | { | |
949 | struct sk_buff *skb; | |
950 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
951 | int len; | |
952 | int nframes; | |
953 | int x; | |
954 | int offset; | |
955 | struct usb_cdc_ncm_ndp16 *ndp16; | |
956 | struct usb_cdc_ncm_dpe16 *dpe16; | |
957 | int ndpoffset; | |
958 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
959 | ||
960 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
961 | if (ndpoffset < 0) | |
962 | goto error; | |
963 | ||
964 | next_ndp: | |
965 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
966 | if (nframes < 0) | |
967 | goto error; | |
968 | ||
969 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); | |
970 | ||
986e10d6 | 971 | if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
5448d75f BM |
972 | netif_dbg(dev, rx_err, dev->net, |
973 | "invalid DPT16 signature <%#010x>\n", | |
974 | le32_to_cpu(ndp16->dwSignature)); | |
ff06ab13 BM |
975 | goto err_ndp; |
976 | } | |
977 | dpe16 = ndp16->dpe16; | |
900d495a | 978 | |
d5ddb4a5 AO |
979 | for (x = 0; x < nframes; x++, dpe16++) { |
980 | offset = le16_to_cpu(dpe16->wDatagramIndex); | |
981 | len = le16_to_cpu(dpe16->wDatagramLength); | |
900d495a AO |
982 | |
983 | /* | |
984 | * CDC NCM ch. 3.7 | |
985 | * All entries after first NULL entry are to be ignored | |
986 | */ | |
d5ddb4a5 | 987 | if ((offset == 0) || (len == 0)) { |
900d495a | 988 | if (!x) |
75d67d35 | 989 | goto err_ndp; /* empty NTB */ |
900d495a AO |
990 | break; |
991 | } | |
992 | ||
993 | /* sanity checking */ | |
d5ddb4a5 AO |
994 | if (((offset + len) > skb_in->len) || |
995 | (len > ctx->rx_max) || (len < ETH_HLEN)) { | |
ae223cd4 BM |
996 | netif_dbg(dev, rx_err, dev->net, |
997 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
998 | x, offset, len, skb_in); | |
900d495a | 999 | if (!x) |
75d67d35 | 1000 | goto err_ndp; |
900d495a AO |
1001 | break; |
1002 | ||
1003 | } else { | |
1004 | skb = skb_clone(skb_in, GFP_ATOMIC); | |
9e56790a JJ |
1005 | if (!skb) |
1006 | goto error; | |
d5ddb4a5 | 1007 | skb->len = len; |
900d495a | 1008 | skb->data = ((u8 *)skb_in->data) + offset; |
d5ddb4a5 | 1009 | skb_set_tail_pointer(skb, len); |
900d495a AO |
1010 | usbnet_skb_return(dev, skb); |
1011 | } | |
1012 | } | |
75d67d35 BM |
1013 | err_ndp: |
1014 | /* are there more NDPs to process? */ | |
1015 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1016 | if (ndpoffset && loopcount--) | |
1017 | goto next_ndp; | |
1018 | ||
900d495a AO |
1019 | return 1; |
1020 | error: | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static void | |
bed6f762 | 1025 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1026 | struct usb_cdc_speed_change *data) |
900d495a | 1027 | { |
84e77a8b AO |
1028 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1029 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1030 | |
1031 | /* | |
1032 | * Currently the USB-NET API does not support reporting the actual | |
1033 | * device speed. Do print it instead. | |
1034 | */ | |
f3028c52 | 1035 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { |
ae223cd4 BM |
1036 | netif_info(dev, link, dev->net, |
1037 | "%u mbit/s downlink %u mbit/s uplink\n", | |
f3028c52 BM |
1038 | (unsigned int)(rx_speed / 1000000U), |
1039 | (unsigned int)(tx_speed / 1000000U)); | |
1040 | } else { | |
ae223cd4 BM |
1041 | netif_info(dev, link, dev->net, |
1042 | "%u kbit/s downlink %u kbit/s uplink\n", | |
f3028c52 BM |
1043 | (unsigned int)(rx_speed / 1000U), |
1044 | (unsigned int)(tx_speed / 1000U)); | |
900d495a AO |
1045 | } |
1046 | } | |
1047 | ||
1048 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1049 | { | |
1050 | struct cdc_ncm_ctx *ctx; | |
1051 | struct usb_cdc_notification *event; | |
1052 | ||
1053 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1054 | ||
1055 | if (urb->actual_length < sizeof(*event)) | |
1056 | return; | |
1057 | ||
1058 | /* test for split data in 8-byte chunks */ | |
1059 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1060 | cdc_ncm_speed_change(dev, |
84e77a8b | 1061 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1062 | return; |
1063 | } | |
1064 | ||
1065 | event = urb->transfer_buffer; | |
1066 | ||
1067 | switch (event->bNotificationType) { | |
1068 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1069 | /* | |
1070 | * According to the CDC NCM specification ch.7.1 | |
1071 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1072 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1073 | */ | |
1a7c6cc6 | 1074 | ctx->connected = le16_to_cpu(event->wValue); |
ae223cd4 BM |
1075 | netif_info(dev, link, dev->net, |
1076 | "network connection: %sconnected\n", | |
1077 | ctx->connected ? "" : "dis"); | |
8a34b0ae | 1078 | usbnet_link_change(dev, ctx->connected, 0); |
900d495a AO |
1079 | break; |
1080 | ||
1081 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1082 | if (urb->actual_length < (sizeof(*event) + |
1083 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1084 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1085 | else | |
bed6f762 BM |
1086 | cdc_ncm_speed_change(dev, |
1087 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1088 | break; |
1089 | ||
1090 | default: | |
67a36606 BM |
1091 | dev_dbg(&dev->udev->dev, |
1092 | "NCM: unexpected notification 0x%02x!\n", | |
1093 | event->bNotificationType); | |
900d495a AO |
1094 | break; |
1095 | } | |
1096 | } | |
1097 | ||
1098 | static int cdc_ncm_check_connect(struct usbnet *dev) | |
1099 | { | |
1100 | struct cdc_ncm_ctx *ctx; | |
1101 | ||
1102 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1103 | if (ctx == NULL) | |
1104 | return 1; /* disconnected */ | |
1105 | ||
1106 | return !ctx->connected; | |
1107 | } | |
1108 | ||
900d495a AO |
1109 | static const struct driver_info cdc_ncm_info = { |
1110 | .description = "CDC NCM", | |
c261344d | 1111 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, |
900d495a AO |
1112 | .bind = cdc_ncm_bind, |
1113 | .unbind = cdc_ncm_unbind, | |
1114 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1115 | .manage_power = usbnet_manage_power, |
900d495a AO |
1116 | .status = cdc_ncm_status, |
1117 | .rx_fixup = cdc_ncm_rx_fixup, | |
1118 | .tx_fixup = cdc_ncm_tx_fixup, | |
1119 | }; | |
1120 | ||
f94898ea DW |
1121 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1122 | static const struct driver_info wwan_info = { | |
1123 | .description = "Mobile Broadband Network Device", | |
1124 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1125 | | FLAG_WWAN, | |
1126 | .bind = cdc_ncm_bind, | |
1127 | .unbind = cdc_ncm_unbind, | |
1128 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1129 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1130 | .status = cdc_ncm_status, |
1131 | .rx_fixup = cdc_ncm_rx_fixup, | |
1132 | .tx_fixup = cdc_ncm_tx_fixup, | |
1133 | }; | |
1134 | ||
2f62d5aa WS |
1135 | /* Same as wwan_info, but with FLAG_NOARP */ |
1136 | static const struct driver_info wwan_noarp_info = { | |
1137 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1138 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1139 | | FLAG_WWAN | FLAG_NOARP, | |
1140 | .bind = cdc_ncm_bind, | |
1141 | .unbind = cdc_ncm_unbind, | |
1142 | .check_connect = cdc_ncm_check_connect, | |
1143 | .manage_power = usbnet_manage_power, | |
1144 | .status = cdc_ncm_status, | |
1145 | .rx_fixup = cdc_ncm_rx_fixup, | |
1146 | .tx_fixup = cdc_ncm_tx_fixup, | |
1147 | }; | |
1148 | ||
f94898ea DW |
1149 | static const struct usb_device_id cdc_devs[] = { |
1150 | /* Ericsson MBM devices like F5521gw */ | |
1151 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1152 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1153 | .idVendor = 0x0bdb, | |
1154 | .bInterfaceClass = USB_CLASS_COMM, | |
1155 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1156 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1157 | .driver_info = (unsigned long) &wwan_info, | |
1158 | }, | |
1159 | ||
f3a1ef9c PM |
1160 | /* Dell branded MBM devices like DW5550 */ |
1161 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1162 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1163 | .idVendor = 0x413c, | |
1164 | .bInterfaceClass = USB_CLASS_COMM, | |
1165 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1166 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1167 | .driver_info = (unsigned long) &wwan_info, | |
1168 | }, | |
1169 | ||
1170 | /* Toshiba branded MBM devices */ | |
1171 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1172 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1173 | .idVendor = 0x0930, | |
1174 | .bInterfaceClass = USB_CLASS_COMM, | |
1175 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1176 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1177 | .driver_info = (unsigned long) &wwan_info, | |
1178 | }, | |
1179 | ||
1f84eab4 BM |
1180 | /* tag Huawei devices as wwan */ |
1181 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
1182 | USB_CLASS_COMM, | |
1183 | USB_CDC_SUBCLASS_NCM, | |
1184 | USB_CDC_PROTO_NONE), | |
1185 | .driver_info = (unsigned long)&wwan_info, | |
1186 | }, | |
1187 | ||
bbc8d922 BM |
1188 | /* Huawei NCM devices disguised as vendor specific */ |
1189 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), | |
1190 | .driver_info = (unsigned long)&wwan_info, | |
1191 | }, | |
1192 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), | |
1193 | .driver_info = (unsigned long)&wwan_info, | |
1194 | }, | |
96316c59 BM |
1195 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76), |
1196 | .driver_info = (unsigned long)&wwan_info, | |
1197 | }, | |
bbc8d922 | 1198 | |
2f62d5aa WS |
1199 | /* Infineon(now Intel) HSPA Modem platform */ |
1200 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
1201 | USB_CLASS_COMM, | |
1202 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1203 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1204 | }, | |
1205 | ||
f94898ea DW |
1206 | /* Generic CDC-NCM devices */ |
1207 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
1208 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1209 | .driver_info = (unsigned long)&cdc_ncm_info, | |
1210 | }, | |
1211 | { | |
1212 | }, | |
1213 | }; | |
1214 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
1215 | ||
900d495a AO |
1216 | static struct usb_driver cdc_ncm_driver = { |
1217 | .name = "cdc_ncm", | |
1218 | .id_table = cdc_devs, | |
085e50e1 BM |
1219 | .probe = usbnet_probe, |
1220 | .disconnect = usbnet_disconnect, | |
900d495a AO |
1221 | .suspend = usbnet_suspend, |
1222 | .resume = usbnet_resume, | |
85e3c65f | 1223 | .reset_resume = usbnet_resume, |
900d495a | 1224 | .supports_autosuspend = 1, |
e1f12eb6 | 1225 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
1226 | }; |
1227 | ||
d632eb1b | 1228 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
1229 | |
1230 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1231 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1232 | MODULE_LICENSE("Dual BSD/GPL"); |