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 | |
c84ff1d6 | 56 | #define DRIVER_VERSION "14-Mar-2012" |
900d495a | 57 | |
1e8bbe6c BM |
58 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
59 | static bool prefer_mbim = true; | |
60 | #else | |
61 | static bool prefer_mbim; | |
62 | #endif | |
63 | module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); | |
64 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); | |
65 | ||
c84ff1d6 AO |
66 | static void cdc_ncm_txpath_bh(unsigned long param); |
67 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); | |
68 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 69 | static struct usb_driver cdc_ncm_driver; |
900d495a AO |
70 | |
71 | static void | |
72 | cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) | |
73 | { | |
74 | struct usbnet *dev = netdev_priv(net); | |
75 | ||
7826d43f JP |
76 | strlcpy(info->driver, dev->driver_name, sizeof(info->driver)); |
77 | strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); | |
78 | strlcpy(info->fw_version, dev->driver_info->description, | |
900d495a AO |
79 | sizeof(info->fw_version)); |
80 | usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); | |
81 | } | |
82 | ||
900d495a AO |
83 | static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) |
84 | { | |
900d495a | 85 | u32 val; |
900d495a AO |
86 | u8 flags; |
87 | u8 iface_no; | |
88 | int err; | |
2d1c4310 | 89 | int eth_hlen; |
84e77a8b | 90 | u16 ntb_fmt_supported; |
2d1c4310 GS |
91 | u32 min_dgram_size; |
92 | u32 min_hdr_size; | |
90b8b037 | 93 | struct usbnet *dev = netdev_priv(ctx->netdev); |
900d495a AO |
94 | |
95 | iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
96 | ||
90b8b037 ML |
97 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
98 | USB_TYPE_CLASS | USB_DIR_IN | |
99 | |USB_RECIP_INTERFACE, | |
100 | 0, iface_no, &ctx->ncm_parm, | |
101 | sizeof(ctx->ncm_parm)); | |
36c35416 | 102 | if (err < 0) { |
900d495a AO |
103 | pr_debug("failed GET_NTB_PARAMETERS\n"); |
104 | return 1; | |
105 | } | |
106 | ||
107 | /* read correct set of parameters according to device mode */ | |
108 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); | |
109 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
110 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
111 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
112 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b AO |
113 | /* devices prior to NCM Errata shall set this field to zero */ |
114 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); | |
115 | ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); | |
900d495a | 116 | |
2d1c4310 GS |
117 | eth_hlen = ETH_HLEN; |
118 | min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE; | |
119 | min_hdr_size = CDC_NCM_MIN_HDR_SIZE; | |
120 | if (ctx->mbim_desc != NULL) { | |
121 | flags = ctx->mbim_desc->bmNetworkCapabilities; | |
122 | eth_hlen = 0; | |
123 | min_dgram_size = CDC_MBIM_MIN_DATAGRAM_SIZE; | |
124 | min_hdr_size = 0; | |
125 | } else if (ctx->func_desc != NULL) { | |
900d495a | 126 | flags = ctx->func_desc->bmNetworkCapabilities; |
2d1c4310 | 127 | } else { |
900d495a | 128 | flags = 0; |
2d1c4310 | 129 | } |
900d495a AO |
130 | |
131 | pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " | |
132 | "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " | |
84e77a8b | 133 | "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", |
900d495a | 134 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, |
84e77a8b | 135 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); |
900d495a | 136 | |
84e77a8b AO |
137 | /* max count of tx datagrams */ |
138 | if ((ctx->tx_max_datagrams == 0) || | |
139 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
140 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a AO |
141 | |
142 | /* verify maximum size of received NTB in bytes */ | |
84e77a8b AO |
143 | if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { |
144 | pr_debug("Using min receive length=%d\n", | |
145 | USB_CDC_NCM_NTB_MIN_IN_SIZE); | |
146 | ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
147 | } | |
148 | ||
149 | if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { | |
900d495a AO |
150 | pr_debug("Using default maximum receive length=%d\n", |
151 | CDC_NCM_NTB_MAX_SIZE_RX); | |
152 | ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; | |
153 | } | |
154 | ||
84e77a8b AO |
155 | /* inform device about NTB input size changes */ |
156 | if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { | |
90b8b037 | 157 | __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); |
84e77a8b | 158 | |
90b8b037 ML |
159 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
160 | USB_TYPE_CLASS | USB_DIR_OUT | |
161 | | USB_RECIP_INTERFACE, | |
162 | 0, iface_no, &dwNtbInMaxSize, 4); | |
36c35416 | 163 | if (err < 0) |
84e77a8b AO |
164 | pr_debug("Setting NTB Input Size failed\n"); |
165 | } | |
166 | ||
900d495a AO |
167 | /* verify maximum size of transmitted NTB in bytes */ |
168 | if ((ctx->tx_max < | |
2d1c4310 | 169 | (min_hdr_size + min_dgram_size)) || |
900d495a AO |
170 | (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { |
171 | pr_debug("Using default maximum transmit length=%d\n", | |
172 | CDC_NCM_NTB_MAX_SIZE_TX); | |
173 | ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; | |
174 | } | |
175 | ||
176 | /* | |
177 | * verify that the structure alignment is: | |
178 | * - power of two | |
179 | * - not greater than the maximum transmit length | |
180 | * - not less than four bytes | |
181 | */ | |
182 | val = ctx->tx_ndp_modulus; | |
183 | ||
184 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
185 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
186 | pr_debug("Using default alignment: 4 bytes\n"); | |
187 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; | |
188 | } | |
189 | ||
190 | /* | |
191 | * verify that the payload alignment is: | |
192 | * - power of two | |
193 | * - not greater than the maximum transmit length | |
194 | * - not less than four bytes | |
195 | */ | |
196 | val = ctx->tx_modulus; | |
197 | ||
198 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
199 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
200 | pr_debug("Using default transmit modulus: 4 bytes\n"); | |
201 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; | |
202 | } | |
203 | ||
204 | /* verify the payload remainder */ | |
205 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
206 | pr_debug("Using default transmit remainder: 0 bytes\n"); | |
207 | ctx->tx_remainder = 0; | |
208 | } | |
209 | ||
210 | /* adjust TX-remainder according to NCM specification. */ | |
2d1c4310 GS |
211 | ctx->tx_remainder = ((ctx->tx_remainder - eth_hlen) & |
212 | (ctx->tx_modulus - 1)); | |
900d495a AO |
213 | |
214 | /* additional configuration */ | |
215 | ||
216 | /* set CRC Mode */ | |
84e77a8b | 217 | if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { |
90b8b037 ML |
218 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, |
219 | USB_TYPE_CLASS | USB_DIR_OUT | |
220 | | USB_RECIP_INTERFACE, | |
221 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
222 | iface_no, NULL, 0); | |
36c35416 | 223 | if (err < 0) |
84e77a8b AO |
224 | pr_debug("Setting CRC mode off failed\n"); |
225 | } | |
900d495a | 226 | |
84e77a8b AO |
227 | /* set NTB format, if both formats are supported */ |
228 | if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { | |
90b8b037 ML |
229 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, |
230 | USB_TYPE_CLASS | USB_DIR_OUT | |
231 | | USB_RECIP_INTERFACE, | |
232 | USB_CDC_NCM_NTB16_FORMAT, | |
233 | iface_no, NULL, 0); | |
36c35416 | 234 | if (err < 0) |
84e77a8b AO |
235 | pr_debug("Setting NTB format to 16-bit failed\n"); |
236 | } | |
900d495a | 237 | |
2d1c4310 | 238 | ctx->max_datagram_size = min_dgram_size; |
900d495a AO |
239 | |
240 | /* set Max Datagram Size (MTU) */ | |
84e77a8b | 241 | if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { |
90b8b037 | 242 | __le16 max_datagram_size; |
2d1c4310 GS |
243 | u16 eth_max_sz; |
244 | if (ctx->ether_desc != NULL) | |
245 | eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
246 | else if (ctx->mbim_desc != NULL) | |
247 | eth_max_sz = le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
248 | else | |
249 | goto max_dgram_err; | |
75bc8ef5 | 250 | |
90b8b037 ML |
251 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, |
252 | USB_TYPE_CLASS | USB_DIR_IN | |
253 | | USB_RECIP_INTERFACE, | |
254 | 0, iface_no, &max_datagram_size, 2); | |
36c35416 | 255 | if (err < 0) { |
84e77a8b | 256 | pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", |
2d1c4310 | 257 | min_dgram_size); |
84e77a8b | 258 | } else { |
75bc8ef5 | 259 | ctx->max_datagram_size = |
90b8b037 | 260 | le16_to_cpu(max_datagram_size); |
84e77a8b | 261 | /* Check Eth descriptor value */ |
3f658cde | 262 | if (ctx->max_datagram_size > eth_max_sz) |
84e77a8b | 263 | ctx->max_datagram_size = eth_max_sz; |
3f658cde AO |
264 | |
265 | if (ctx->max_datagram_size > CDC_NCM_MAX_DATAGRAM_SIZE) | |
2d1c4310 | 266 | ctx->max_datagram_size = CDC_NCM_MAX_DATAGRAM_SIZE; |
900d495a | 267 | |
2d1c4310 GS |
268 | if (ctx->max_datagram_size < min_dgram_size) |
269 | ctx->max_datagram_size = min_dgram_size; | |
84e77a8b AO |
270 | |
271 | /* if value changed, update device */ | |
3f658cde | 272 | if (ctx->max_datagram_size != |
90b8b037 ML |
273 | le16_to_cpu(max_datagram_size)) { |
274 | err = usbnet_write_cmd(dev, | |
36c35416 GS |
275 | USB_CDC_SET_MAX_DATAGRAM_SIZE, |
276 | USB_TYPE_CLASS | USB_DIR_OUT | |
277 | | USB_RECIP_INTERFACE, | |
278 | 0, | |
90b8b037 ML |
279 | iface_no, &max_datagram_size, |
280 | 2); | |
3f658cde AO |
281 | if (err < 0) |
282 | pr_debug("SET_MAX_DGRAM_SIZE failed\n"); | |
283 | } | |
84e77a8b | 284 | } |
900d495a AO |
285 | } |
286 | ||
3f658cde | 287 | max_dgram_err: |
2d1c4310 GS |
288 | if (ctx->netdev->mtu != (ctx->max_datagram_size - eth_hlen)) |
289 | ctx->netdev->mtu = ctx->max_datagram_size - eth_hlen; | |
900d495a AO |
290 | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static void | |
295 | cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) | |
296 | { | |
297 | struct usb_host_endpoint *e; | |
298 | u8 ep; | |
299 | ||
300 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
301 | ||
302 | e = intf->cur_altsetting->endpoint + ep; | |
303 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
304 | case USB_ENDPOINT_XFER_INT: | |
305 | if (usb_endpoint_dir_in(&e->desc)) { | |
306 | if (ctx->status_ep == NULL) | |
307 | ctx->status_ep = e; | |
308 | } | |
309 | break; | |
310 | ||
311 | case USB_ENDPOINT_XFER_BULK: | |
312 | if (usb_endpoint_dir_in(&e->desc)) { | |
313 | if (ctx->in_ep == NULL) | |
314 | ctx->in_ep = e; | |
315 | } else { | |
316 | if (ctx->out_ep == NULL) | |
317 | ctx->out_ep = e; | |
318 | } | |
319 | break; | |
320 | ||
321 | default: | |
322 | break; | |
323 | } | |
324 | } | |
325 | } | |
326 | ||
327 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
328 | { | |
329 | if (ctx == NULL) | |
330 | return; | |
331 | ||
900d495a AO |
332 | if (ctx->tx_rem_skb != NULL) { |
333 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
334 | ctx->tx_rem_skb = NULL; | |
335 | } | |
336 | ||
337 | if (ctx->tx_curr_skb != NULL) { | |
338 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
339 | ctx->tx_curr_skb = NULL; | |
340 | } | |
341 | ||
342 | kfree(ctx); | |
343 | } | |
344 | ||
f94898ea DW |
345 | static const struct ethtool_ops cdc_ncm_ethtool_ops = { |
346 | .get_drvinfo = cdc_ncm_get_drvinfo, | |
347 | .get_link = usbnet_get_link, | |
348 | .get_msglevel = usbnet_get_msglevel, | |
349 | .set_msglevel = usbnet_set_msglevel, | |
350 | .get_settings = usbnet_get_settings, | |
351 | .set_settings = usbnet_set_settings, | |
352 | .nway_reset = usbnet_nway_reset, | |
353 | }; | |
354 | ||
c91ce3b6 | 355 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting) |
900d495a AO |
356 | { |
357 | struct cdc_ncm_ctx *ctx; | |
358 | struct usb_driver *driver; | |
359 | u8 *buf; | |
360 | int len; | |
361 | int temp; | |
362 | u8 iface_no; | |
363 | ||
c796984f | 364 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
365 | if (!ctx) |
366 | return -ENOMEM; | |
900d495a | 367 | |
c84ff1d6 AO |
368 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
369 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
370 | ctx->bh.data = (unsigned long)ctx; | |
371 | ctx->bh.func = cdc_ncm_txpath_bh; | |
372 | atomic_set(&ctx->stop, 0); | |
900d495a AO |
373 | spin_lock_init(&ctx->mtx); |
374 | ctx->netdev = dev->net; | |
375 | ||
376 | /* store ctx pointer in device data field */ | |
377 | dev->data[0] = (unsigned long)ctx; | |
378 | ||
379 | /* get some pointers */ | |
380 | driver = driver_of(intf); | |
381 | buf = intf->cur_altsetting->extra; | |
382 | len = intf->cur_altsetting->extralen; | |
383 | ||
384 | ctx->udev = dev->udev; | |
385 | ctx->intf = intf; | |
386 | ||
387 | /* parse through descriptors associated with control interface */ | |
388 | while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { | |
389 | ||
390 | if (buf[1] != USB_DT_CS_INTERFACE) | |
391 | goto advance; | |
392 | ||
393 | switch (buf[2]) { | |
394 | case USB_CDC_UNION_TYPE: | |
395 | if (buf[0] < sizeof(*(ctx->union_desc))) | |
396 | break; | |
397 | ||
398 | ctx->union_desc = | |
399 | (const struct usb_cdc_union_desc *)buf; | |
400 | ||
401 | ctx->control = usb_ifnum_to_if(dev->udev, | |
402 | ctx->union_desc->bMasterInterface0); | |
403 | ctx->data = usb_ifnum_to_if(dev->udev, | |
404 | ctx->union_desc->bSlaveInterface0); | |
405 | break; | |
406 | ||
407 | case USB_CDC_ETHERNET_TYPE: | |
408 | if (buf[0] < sizeof(*(ctx->ether_desc))) | |
409 | break; | |
410 | ||
411 | ctx->ether_desc = | |
412 | (const struct usb_cdc_ether_desc *)buf; | |
900d495a AO |
413 | dev->hard_mtu = |
414 | le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
415 | ||
84e77a8b AO |
416 | if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) |
417 | dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; | |
418 | else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) | |
419 | dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; | |
900d495a AO |
420 | break; |
421 | ||
422 | case USB_CDC_NCM_TYPE: | |
423 | if (buf[0] < sizeof(*(ctx->func_desc))) | |
424 | break; | |
425 | ||
426 | ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; | |
427 | break; | |
428 | ||
38396e4c GS |
429 | case USB_CDC_MBIM_TYPE: |
430 | if (buf[0] < sizeof(*(ctx->mbim_desc))) | |
431 | break; | |
432 | ||
433 | ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf; | |
434 | break; | |
435 | ||
900d495a AO |
436 | default: |
437 | break; | |
438 | } | |
439 | advance: | |
440 | /* advance to next descriptor */ | |
441 | temp = buf[0]; | |
442 | buf += temp; | |
443 | len -= temp; | |
444 | } | |
445 | ||
9992c2e2 | 446 | /* some buggy devices have an IAD but no CDC Union */ |
56a666dc BM |
447 | if (!ctx->union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
448 | ctx->control = intf; | |
449 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); | |
450 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
451 | } |
452 | ||
900d495a AO |
453 | /* check if we got everything */ |
454 | if ((ctx->control == NULL) || (ctx->data == NULL) || | |
38396e4c | 455 | ((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf)))) |
900d495a AO |
456 | goto error; |
457 | ||
bbc8d922 BM |
458 | /* claim data interface, if different from control */ |
459 | if (ctx->data != ctx->control) { | |
460 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
461 | if (temp) | |
462 | goto error; | |
463 | } | |
900d495a AO |
464 | |
465 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
466 | ||
467 | /* reset data interface */ | |
468 | temp = usb_set_interface(dev->udev, iface_no, 0); | |
469 | if (temp) | |
19694ac8 | 470 | goto error2; |
900d495a AO |
471 | |
472 | /* initialize data interface */ | |
473 | if (cdc_ncm_setup(ctx)) | |
19694ac8 | 474 | goto error2; |
900d495a AO |
475 | |
476 | /* configure data interface */ | |
38396e4c | 477 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
900d495a | 478 | if (temp) |
19694ac8 | 479 | goto error2; |
900d495a AO |
480 | |
481 | cdc_ncm_find_endpoints(ctx, ctx->data); | |
482 | cdc_ncm_find_endpoints(ctx, ctx->control); | |
483 | ||
484 | if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || | |
485 | (ctx->status_ep == NULL)) | |
19694ac8 | 486 | goto error2; |
900d495a AO |
487 | |
488 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
489 | ||
490 | usb_set_intfdata(ctx->data, dev); | |
491 | usb_set_intfdata(ctx->control, dev); | |
492 | usb_set_intfdata(ctx->intf, dev); | |
493 | ||
38396e4c GS |
494 | if (ctx->ether_desc) { |
495 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
496 | if (temp) | |
497 | goto error2; | |
498 | dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
499 | } | |
900d495a | 500 | |
900d495a AO |
501 | |
502 | dev->in = usb_rcvbulkpipe(dev->udev, | |
503 | ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
504 | dev->out = usb_sndbulkpipe(dev->udev, | |
505 | ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
506 | dev->status = ctx->status_ep; | |
507 | dev->rx_urb_size = ctx->rx_max; | |
508 | ||
900d495a AO |
509 | ctx->tx_speed = ctx->rx_speed = 0; |
510 | return 0; | |
511 | ||
19694ac8 AO |
512 | error2: |
513 | usb_set_intfdata(ctx->control, NULL); | |
514 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
515 | if (ctx->data != ctx->control) |
516 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
517 | error: |
518 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
519 | dev->data[0] = 0; | |
19694ac8 | 520 | dev_info(&dev->udev->dev, "bind() failure\n"); |
900d495a AO |
521 | return -ENODEV; |
522 | } | |
c91ce3b6 | 523 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 524 | |
c91ce3b6 | 525 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
526 | { |
527 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 528 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
529 | |
530 | if (ctx == NULL) | |
531 | return; /* no setup */ | |
532 | ||
c84ff1d6 AO |
533 | atomic_set(&ctx->stop, 1); |
534 | ||
535 | if (hrtimer_active(&ctx->tx_timer)) | |
536 | hrtimer_cancel(&ctx->tx_timer); | |
537 | ||
538 | tasklet_kill(&ctx->bh); | |
539 | ||
bbc8d922 BM |
540 | /* handle devices with combined control and data interface */ |
541 | if (ctx->control == ctx->data) | |
542 | ctx->data = NULL; | |
543 | ||
19694ac8 AO |
544 | /* disconnect master --> disconnect slave */ |
545 | if (intf == ctx->control && ctx->data) { | |
546 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 547 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 548 | ctx->data = NULL; |
900d495a | 549 | |
19694ac8 AO |
550 | } else if (intf == ctx->data && ctx->control) { |
551 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 552 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 553 | ctx->control = NULL; |
900d495a AO |
554 | } |
555 | ||
19694ac8 | 556 | usb_set_intfdata(ctx->intf, NULL); |
900d495a AO |
557 | cdc_ncm_free(ctx); |
558 | } | |
c91ce3b6 | 559 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 560 | |
1e8bbe6c BM |
561 | /* Select the MBIM altsetting iff it is preferred and available, |
562 | * returning the number of the corresponding data interface altsetting | |
563 | */ | |
564 | u8 cdc_ncm_select_altsetting(struct usbnet *dev, struct usb_interface *intf) | |
38396e4c | 565 | { |
1e8bbe6c | 566 | struct usb_host_interface *alt; |
38396e4c | 567 | |
bd329e12 BM |
568 | /* The MBIM spec defines a NCM compatible default altsetting, |
569 | * which we may have matched: | |
570 | * | |
571 | * "Functions that implement both NCM 1.0 and MBIM (an | |
572 | * “NCM/MBIM function”) according to this recommendation | |
573 | * shall provide two alternate settings for the | |
574 | * Communication Interface. Alternate setting 0, and the | |
575 | * associated class and endpoint descriptors, shall be | |
576 | * constructed according to the rules given for the | |
577 | * Communication Interface in section 5 of [USBNCM10]. | |
578 | * Alternate setting 1, and the associated class and | |
579 | * endpoint descriptors, shall be constructed according to | |
580 | * the rules given in section 6 (USB Device Model) of this | |
581 | * specification." | |
bd329e12 | 582 | */ |
1e8bbe6c BM |
583 | if (prefer_mbim && intf->num_altsetting == 2) { |
584 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); | |
585 | if (alt && cdc_ncm_comm_intf_is_mbim(alt) && | |
586 | !usb_set_interface(dev->udev, | |
587 | intf->cur_altsetting->desc.bInterfaceNumber, | |
588 | CDC_NCM_COMM_ALTSETTING_MBIM)) | |
589 | return CDC_NCM_DATA_ALTSETTING_MBIM; | |
f350ca03 | 590 | } |
1e8bbe6c BM |
591 | return CDC_NCM_DATA_ALTSETTING_NCM; |
592 | } | |
593 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
594 | ||
595 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
596 | { | |
597 | int ret; | |
598 | ||
599 | /* MBIM backwards compatible function? */ | |
600 | cdc_ncm_select_altsetting(dev, intf); | |
601 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) | |
602 | return -ENODEV; | |
bd329e12 | 603 | |
38396e4c GS |
604 | /* NCM data altsetting is always 1 */ |
605 | ret = cdc_ncm_bind_common(dev, intf, 1); | |
606 | ||
607 | /* | |
608 | * We should get an event when network connection is "connected" or | |
609 | * "disconnected". Set network connection in "disconnected" state | |
610 | * (carrier is OFF) during attach, so the IP network stack does not | |
611 | * start IPv6 negotiation and more. | |
612 | */ | |
613 | netif_carrier_off(dev->net); | |
614 | return ret; | |
615 | } | |
616 | ||
c78b7c58 | 617 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 618 | { |
c78b7c58 BM |
619 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
620 | ||
621 | if (skb->len + align > max) | |
622 | align = max - skb->len; | |
623 | if (align && skb_tailroom(skb) >= align) | |
624 | memset(skb_put(skb, align), 0, align); | |
625 | } | |
626 | ||
627 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
628 | * allocating a new one within skb | |
629 | */ | |
630 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) | |
631 | { | |
632 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
633 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
634 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
635 | ||
636 | /* follow the chain of NDPs, looking for a match */ | |
637 | while (ndpoffset) { | |
638 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
639 | if (ndp16->dwSignature == sign) | |
640 | return ndp16; | |
641 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
642 | } | |
643 | ||
644 | /* align new NDP */ | |
645 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); | |
646 | ||
647 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
648 | if ((ctx->tx_max - skb->len - reserve) < CDC_NCM_NDP_SIZE) | |
649 | return NULL; | |
650 | ||
651 | /* link to it */ | |
652 | if (ndp16) | |
653 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
654 | else | |
655 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
656 | ||
657 | /* push a new empty NDP */ | |
658 | ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, CDC_NCM_NDP_SIZE), 0, CDC_NCM_NDP_SIZE); | |
659 | ndp16->dwSignature = sign; | |
660 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
661 | return ndp16; | |
900d495a AO |
662 | } |
663 | ||
c91ce3b6 | 664 | struct sk_buff * |
c78b7c58 | 665 | cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign) |
900d495a | 666 | { |
c78b7c58 BM |
667 | struct usb_cdc_ncm_nth16 *nth16; |
668 | struct usb_cdc_ncm_ndp16 *ndp16; | |
900d495a | 669 | struct sk_buff *skb_out; |
c78b7c58 | 670 | u16 n = 0, index, ndplen; |
84e77a8b | 671 | u8 ready2send = 0; |
900d495a AO |
672 | |
673 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 674 | if (skb != NULL) { |
900d495a | 675 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
676 | swap(sign, ctx->tx_rem_sign); |
677 | } else { | |
84e77a8b | 678 | ready2send = 1; |
c78b7c58 | 679 | } |
900d495a AO |
680 | |
681 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 682 | skb_out = ctx->tx_curr_skb; |
900d495a | 683 | |
c78b7c58 BM |
684 | /* allocate a new OUT skb */ |
685 | if (!skb_out) { | |
6c60408e | 686 | skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); |
900d495a AO |
687 | if (skb_out == NULL) { |
688 | if (skb != NULL) { | |
689 | dev_kfree_skb_any(skb); | |
690 | ctx->netdev->stats.tx_dropped++; | |
691 | } | |
692 | goto exit_no_skb; | |
693 | } | |
c78b7c58 BM |
694 | /* fill out the initial 16-bit NTB header */ |
695 | nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); | |
696 | nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
697 | nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
698 | nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
900d495a | 699 | |
c78b7c58 | 700 | /* count total number of frames in this NTB */ |
900d495a AO |
701 | ctx->tx_curr_frame_num = 0; |
702 | } | |
703 | ||
c78b7c58 BM |
704 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
705 | /* send any remaining skb first */ | |
900d495a AO |
706 | if (skb == NULL) { |
707 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 708 | sign = ctx->tx_rem_sign; |
900d495a AO |
709 | ctx->tx_rem_skb = NULL; |
710 | ||
711 | /* check for end of skb */ | |
712 | if (skb == NULL) | |
713 | break; | |
714 | } | |
715 | ||
c78b7c58 BM |
716 | /* get the appropriate NDP for this skb */ |
717 | ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
718 | ||
719 | /* align beginning of next frame */ | |
720 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); | |
721 | ||
722 | /* check if we had enough room left for both NDP and frame */ | |
723 | if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) { | |
900d495a AO |
724 | if (n == 0) { |
725 | /* won't fit, MTU problem? */ | |
726 | dev_kfree_skb_any(skb); | |
727 | skb = NULL; | |
728 | ctx->netdev->stats.tx_dropped++; | |
729 | } else { | |
730 | /* no room for skb - store for later */ | |
731 | if (ctx->tx_rem_skb != NULL) { | |
732 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
733 | ctx->netdev->stats.tx_dropped++; | |
734 | } | |
735 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 736 | ctx->tx_rem_sign = sign; |
900d495a | 737 | skb = NULL; |
84e77a8b | 738 | ready2send = 1; |
900d495a AO |
739 | } |
740 | break; | |
741 | } | |
742 | ||
c78b7c58 BM |
743 | /* calculate frame number withing this NDP */ |
744 | ndplen = le16_to_cpu(ndp16->wLength); | |
745 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
900d495a | 746 | |
c78b7c58 BM |
747 | /* OK, add this skb */ |
748 | ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
749 | ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
750 | ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
751 | memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); | |
900d495a AO |
752 | dev_kfree_skb_any(skb); |
753 | skb = NULL; | |
c78b7c58 BM |
754 | |
755 | /* send now if this NDP is full */ | |
756 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
757 | ready2send = 1; | |
758 | break; | |
759 | } | |
900d495a AO |
760 | } |
761 | ||
762 | /* free up any dangling skb */ | |
763 | if (skb != NULL) { | |
764 | dev_kfree_skb_any(skb); | |
765 | skb = NULL; | |
766 | ctx->netdev->stats.tx_dropped++; | |
767 | } | |
768 | ||
769 | ctx->tx_curr_frame_num = n; | |
770 | ||
771 | if (n == 0) { | |
772 | /* wait for more frames */ | |
773 | /* push variables */ | |
774 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
775 | goto exit_no_skb; |
776 | ||
84e77a8b | 777 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { |
900d495a AO |
778 | /* wait for more frames */ |
779 | /* push variables */ | |
780 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
781 | /* set the pending count */ |
782 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 783 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
784 | goto exit_no_skb; |
785 | ||
786 | } else { | |
787 | /* frame goes out */ | |
788 | /* variables will be reset at next call */ | |
789 | } | |
790 | ||
900d495a AO |
791 | /* |
792 | * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, | |
793 | * we send buffers as it is. If we get more data, it would be more | |
794 | * efficient for USB HS mobile device with DMA engine to receive a full | |
795 | * size NTB, than canceling DMA transfer and receiving a short packet. | |
796 | */ | |
c78b7c58 BM |
797 | if (skb_out->len > CDC_NCM_MIN_TX_PKT) |
798 | /* final zero padding */ | |
799 | memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len); | |
900d495a | 800 | |
c78b7c58 BM |
801 | /* do we need to prevent a ZLP? */ |
802 | if (((skb_out->len % le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0) && | |
803 | (skb_out->len < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)) && skb_tailroom(skb_out)) | |
804 | *skb_put(skb_out, 1) = 0; /* force short packet */ | |
900d495a | 805 | |
c78b7c58 BM |
806 | /* set final frame length */ |
807 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
808 | nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
900d495a AO |
809 | |
810 | /* return skb */ | |
811 | ctx->tx_curr_skb = NULL; | |
c84ff1d6 | 812 | ctx->netdev->stats.tx_packets += ctx->tx_curr_frame_num; |
900d495a AO |
813 | return skb_out; |
814 | ||
815 | exit_no_skb: | |
c84ff1d6 AO |
816 | /* Start timer, if there is a remaining skb */ |
817 | if (ctx->tx_curr_skb != NULL) | |
818 | cdc_ncm_tx_timeout_start(ctx); | |
900d495a AO |
819 | return NULL; |
820 | } | |
c91ce3b6 | 821 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
822 | |
823 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
824 | { | |
825 | /* start timer, if not already started */ | |
c84ff1d6 AO |
826 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
827 | hrtimer_start(&ctx->tx_timer, | |
828 | ktime_set(0, CDC_NCM_TIMER_INTERVAL), | |
829 | HRTIMER_MODE_REL); | |
900d495a AO |
830 | } |
831 | ||
c84ff1d6 | 832 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 833 | { |
c84ff1d6 AO |
834 | struct cdc_ncm_ctx *ctx = |
835 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 836 | |
c84ff1d6 AO |
837 | if (!atomic_read(&ctx->stop)) |
838 | tasklet_schedule(&ctx->bh); | |
839 | return HRTIMER_NORESTART; | |
840 | } | |
900d495a | 841 | |
c84ff1d6 AO |
842 | static void cdc_ncm_txpath_bh(unsigned long param) |
843 | { | |
844 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)param; | |
900d495a | 845 | |
c84ff1d6 AO |
846 | spin_lock_bh(&ctx->mtx); |
847 | if (ctx->tx_timer_pending != 0) { | |
848 | ctx->tx_timer_pending--; | |
900d495a | 849 | cdc_ncm_tx_timeout_start(ctx); |
c84ff1d6 | 850 | spin_unlock_bh(&ctx->mtx); |
f742aa8a | 851 | } else if (ctx->netdev != NULL) { |
c84ff1d6 AO |
852 | spin_unlock_bh(&ctx->mtx); |
853 | netif_tx_lock_bh(ctx->netdev); | |
900d495a | 854 | usbnet_start_xmit(NULL, ctx->netdev); |
c84ff1d6 | 855 | netif_tx_unlock_bh(ctx->netdev); |
7b1e0cba BM |
856 | } else { |
857 | spin_unlock_bh(&ctx->mtx); | |
f742aa8a | 858 | } |
900d495a AO |
859 | } |
860 | ||
861 | static struct sk_buff * | |
862 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) | |
863 | { | |
864 | struct sk_buff *skb_out; | |
865 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
866 | |
867 | /* | |
868 | * The Ethernet API we are using does not support transmitting | |
869 | * multiple Ethernet frames in a single call. This driver will | |
870 | * accumulate multiple Ethernet frames and send out a larger | |
871 | * USB frame when the USB buffer is full or when a single jiffies | |
872 | * timeout happens. | |
873 | */ | |
874 | if (ctx == NULL) | |
875 | goto error; | |
876 | ||
c84ff1d6 | 877 | spin_lock_bh(&ctx->mtx); |
c78b7c58 | 878 | skb_out = cdc_ncm_fill_tx_frame(ctx, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); |
c84ff1d6 | 879 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
880 | return skb_out; |
881 | ||
882 | error: | |
883 | if (skb != NULL) | |
884 | dev_kfree_skb_any(skb); | |
885 | ||
886 | return NULL; | |
887 | } | |
888 | ||
ff06ab13 | 889 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 890 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 891 | { |
d5ddb4a5 | 892 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
893 | int len; |
894 | int ret = -EINVAL; | |
900d495a | 895 | |
900d495a AO |
896 | if (ctx == NULL) |
897 | goto error; | |
898 | ||
d5ddb4a5 AO |
899 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
900 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
900d495a AO |
901 | pr_debug("frame too short\n"); |
902 | goto error; | |
903 | } | |
904 | ||
d5ddb4a5 | 905 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 906 | |
d5ddb4a5 | 907 | if (le32_to_cpu(nth16->dwSignature) != USB_CDC_NCM_NTH16_SIGN) { |
900d495a | 908 | pr_debug("invalid NTH16 signature <%u>\n", |
d5ddb4a5 | 909 | le32_to_cpu(nth16->dwSignature)); |
900d495a AO |
910 | goto error; |
911 | } | |
912 | ||
d5ddb4a5 AO |
913 | len = le16_to_cpu(nth16->wBlockLength); |
914 | if (len > ctx->rx_max) { | |
915 | pr_debug("unsupported NTB block length %u/%u\n", len, | |
916 | ctx->rx_max); | |
900d495a AO |
917 | goto error; |
918 | } | |
919 | ||
d5ddb4a5 AO |
920 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
921 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && | |
922 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
923 | pr_debug("sequence number glitch prev=%d curr=%d\n", | |
924 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
925 | } | |
926 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
927 | ||
ff06ab13 BM |
928 | ret = le16_to_cpu(nth16->wNdpIndex); |
929 | error: | |
930 | return ret; | |
931 | } | |
c91ce3b6 | 932 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 BM |
933 | |
934 | /* verify NDP header and return number of datagrams, or negative error */ | |
c91ce3b6 | 935 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 BM |
936 | { |
937 | struct usb_cdc_ncm_ndp16 *ndp16; | |
938 | int ret = -EINVAL; | |
939 | ||
75d67d35 BM |
940 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
941 | pr_debug("invalid NDP offset <%u>\n", ndpoffset); | |
900d495a AO |
942 | goto error; |
943 | } | |
75d67d35 | 944 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 945 | |
d5ddb4a5 | 946 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
900d495a | 947 | pr_debug("invalid DPT16 length <%u>\n", |
d5ddb4a5 | 948 | le32_to_cpu(ndp16->dwSignature)); |
ff06ab13 | 949 | goto error; |
900d495a AO |
950 | } |
951 | ||
ff06ab13 | 952 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
953 | sizeof(struct usb_cdc_ncm_ndp16)) / |
954 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 955 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 956 | |
ff06ab13 | 957 | if ((sizeof(struct usb_cdc_ncm_ndp16) + ret * (sizeof(struct usb_cdc_ncm_dpe16))) > |
d5ddb4a5 | 958 | skb_in->len) { |
ff06ab13 BM |
959 | pr_debug("Invalid nframes = %d\n", ret); |
960 | ret = -EINVAL; | |
900d495a AO |
961 | } |
962 | ||
ff06ab13 BM |
963 | error: |
964 | return ret; | |
965 | } | |
c91ce3b6 | 966 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 BM |
967 | |
968 | static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) | |
969 | { | |
970 | struct sk_buff *skb; | |
971 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
972 | int len; | |
973 | int nframes; | |
974 | int x; | |
975 | int offset; | |
976 | struct usb_cdc_ncm_ndp16 *ndp16; | |
977 | struct usb_cdc_ncm_dpe16 *dpe16; | |
978 | int ndpoffset; | |
979 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
980 | ||
981 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
982 | if (ndpoffset < 0) | |
983 | goto error; | |
984 | ||
985 | next_ndp: | |
986 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
987 | if (nframes < 0) | |
988 | goto error; | |
989 | ||
990 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); | |
991 | ||
992 | if (le32_to_cpu(ndp16->dwSignature) != USB_CDC_NCM_NDP16_NOCRC_SIGN) { | |
993 | pr_debug("invalid DPT16 signature <%u>\n", | |
994 | le32_to_cpu(ndp16->dwSignature)); | |
995 | goto err_ndp; | |
996 | } | |
997 | dpe16 = ndp16->dpe16; | |
900d495a | 998 | |
d5ddb4a5 AO |
999 | for (x = 0; x < nframes; x++, dpe16++) { |
1000 | offset = le16_to_cpu(dpe16->wDatagramIndex); | |
1001 | len = le16_to_cpu(dpe16->wDatagramLength); | |
900d495a AO |
1002 | |
1003 | /* | |
1004 | * CDC NCM ch. 3.7 | |
1005 | * All entries after first NULL entry are to be ignored | |
1006 | */ | |
d5ddb4a5 | 1007 | if ((offset == 0) || (len == 0)) { |
900d495a | 1008 | if (!x) |
75d67d35 | 1009 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1010 | break; |
1011 | } | |
1012 | ||
1013 | /* sanity checking */ | |
d5ddb4a5 AO |
1014 | if (((offset + len) > skb_in->len) || |
1015 | (len > ctx->rx_max) || (len < ETH_HLEN)) { | |
900d495a | 1016 | pr_debug("invalid frame detected (ignored)" |
f742aa8a | 1017 | "offset[%u]=%u, length=%u, skb=%p\n", |
d5ddb4a5 | 1018 | x, offset, len, skb_in); |
900d495a | 1019 | if (!x) |
75d67d35 | 1020 | goto err_ndp; |
900d495a AO |
1021 | break; |
1022 | ||
1023 | } else { | |
1024 | skb = skb_clone(skb_in, GFP_ATOMIC); | |
9e56790a JJ |
1025 | if (!skb) |
1026 | goto error; | |
d5ddb4a5 | 1027 | skb->len = len; |
900d495a | 1028 | skb->data = ((u8 *)skb_in->data) + offset; |
d5ddb4a5 | 1029 | skb_set_tail_pointer(skb, len); |
900d495a AO |
1030 | usbnet_skb_return(dev, skb); |
1031 | } | |
1032 | } | |
75d67d35 BM |
1033 | err_ndp: |
1034 | /* are there more NDPs to process? */ | |
1035 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1036 | if (ndpoffset && loopcount--) | |
1037 | goto next_ndp; | |
1038 | ||
900d495a AO |
1039 | return 1; |
1040 | error: | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static void | |
1045 | cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, | |
84e77a8b | 1046 | struct usb_cdc_speed_change *data) |
900d495a | 1047 | { |
84e77a8b AO |
1048 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1049 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1050 | |
1051 | /* | |
1052 | * Currently the USB-NET API does not support reporting the actual | |
1053 | * device speed. Do print it instead. | |
1054 | */ | |
1055 | if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { | |
1056 | ctx->tx_speed = tx_speed; | |
1057 | ctx->rx_speed = rx_speed; | |
1058 | ||
1059 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { | |
1060 | printk(KERN_INFO KBUILD_MODNAME | |
1061 | ": %s: %u mbit/s downlink " | |
1062 | "%u mbit/s uplink\n", | |
1063 | ctx->netdev->name, | |
1064 | (unsigned int)(rx_speed / 1000000U), | |
1065 | (unsigned int)(tx_speed / 1000000U)); | |
1066 | } else { | |
1067 | printk(KERN_INFO KBUILD_MODNAME | |
1068 | ": %s: %u kbit/s downlink " | |
1069 | "%u kbit/s uplink\n", | |
1070 | ctx->netdev->name, | |
1071 | (unsigned int)(rx_speed / 1000U), | |
1072 | (unsigned int)(tx_speed / 1000U)); | |
1073 | } | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1078 | { | |
1079 | struct cdc_ncm_ctx *ctx; | |
1080 | struct usb_cdc_notification *event; | |
1081 | ||
1082 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1083 | ||
1084 | if (urb->actual_length < sizeof(*event)) | |
1085 | return; | |
1086 | ||
1087 | /* test for split data in 8-byte chunks */ | |
1088 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
1089 | cdc_ncm_speed_change(ctx, | |
84e77a8b | 1090 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1091 | return; |
1092 | } | |
1093 | ||
1094 | event = urb->transfer_buffer; | |
1095 | ||
1096 | switch (event->bNotificationType) { | |
1097 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1098 | /* | |
1099 | * According to the CDC NCM specification ch.7.1 | |
1100 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1101 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1102 | */ | |
1a7c6cc6 | 1103 | ctx->connected = le16_to_cpu(event->wValue); |
900d495a AO |
1104 | |
1105 | printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" | |
1106 | " %sconnected\n", | |
1107 | ctx->netdev->name, ctx->connected ? "" : "dis"); | |
1108 | ||
1109 | if (ctx->connected) | |
1110 | netif_carrier_on(dev->net); | |
1111 | else { | |
1112 | netif_carrier_off(dev->net); | |
1113 | ctx->tx_speed = ctx->rx_speed = 0; | |
1114 | } | |
1115 | break; | |
1116 | ||
1117 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1118 | if (urb->actual_length < (sizeof(*event) + |
1119 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1120 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1121 | else | |
1122 | cdc_ncm_speed_change(ctx, | |
84e77a8b | 1123 | (struct usb_cdc_speed_change *) &event[1]); |
900d495a AO |
1124 | break; |
1125 | ||
1126 | default: | |
67a36606 BM |
1127 | dev_dbg(&dev->udev->dev, |
1128 | "NCM: unexpected notification 0x%02x!\n", | |
1129 | event->bNotificationType); | |
900d495a AO |
1130 | break; |
1131 | } | |
1132 | } | |
1133 | ||
1134 | static int cdc_ncm_check_connect(struct usbnet *dev) | |
1135 | { | |
1136 | struct cdc_ncm_ctx *ctx; | |
1137 | ||
1138 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1139 | if (ctx == NULL) | |
1140 | return 1; /* disconnected */ | |
1141 | ||
1142 | return !ctx->connected; | |
1143 | } | |
1144 | ||
1145 | static int | |
1146 | cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) | |
1147 | { | |
1148 | return usbnet_probe(udev, prod); | |
1149 | } | |
1150 | ||
1151 | static void cdc_ncm_disconnect(struct usb_interface *intf) | |
1152 | { | |
1153 | struct usbnet *dev = usb_get_intfdata(intf); | |
1154 | ||
1155 | if (dev == NULL) | |
1156 | return; /* already disconnected */ | |
1157 | ||
1158 | usbnet_disconnect(intf); | |
1159 | } | |
1160 | ||
900d495a AO |
1161 | static const struct driver_info cdc_ncm_info = { |
1162 | .description = "CDC NCM", | |
c261344d | 1163 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, |
900d495a AO |
1164 | .bind = cdc_ncm_bind, |
1165 | .unbind = cdc_ncm_unbind, | |
1166 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1167 | .manage_power = usbnet_manage_power, |
900d495a AO |
1168 | .status = cdc_ncm_status, |
1169 | .rx_fixup = cdc_ncm_rx_fixup, | |
1170 | .tx_fixup = cdc_ncm_tx_fixup, | |
1171 | }; | |
1172 | ||
f94898ea DW |
1173 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1174 | static const struct driver_info wwan_info = { | |
1175 | .description = "Mobile Broadband Network Device", | |
1176 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1177 | | FLAG_WWAN, | |
1178 | .bind = cdc_ncm_bind, | |
1179 | .unbind = cdc_ncm_unbind, | |
1180 | .check_connect = cdc_ncm_check_connect, | |
a5e40708 | 1181 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1182 | .status = cdc_ncm_status, |
1183 | .rx_fixup = cdc_ncm_rx_fixup, | |
1184 | .tx_fixup = cdc_ncm_tx_fixup, | |
1185 | }; | |
1186 | ||
2f62d5aa WS |
1187 | /* Same as wwan_info, but with FLAG_NOARP */ |
1188 | static const struct driver_info wwan_noarp_info = { | |
1189 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1190 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
1191 | | FLAG_WWAN | FLAG_NOARP, | |
1192 | .bind = cdc_ncm_bind, | |
1193 | .unbind = cdc_ncm_unbind, | |
1194 | .check_connect = cdc_ncm_check_connect, | |
1195 | .manage_power = usbnet_manage_power, | |
1196 | .status = cdc_ncm_status, | |
1197 | .rx_fixup = cdc_ncm_rx_fixup, | |
1198 | .tx_fixup = cdc_ncm_tx_fixup, | |
1199 | }; | |
1200 | ||
f94898ea DW |
1201 | static const struct usb_device_id cdc_devs[] = { |
1202 | /* Ericsson MBM devices like F5521gw */ | |
1203 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1204 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1205 | .idVendor = 0x0bdb, | |
1206 | .bInterfaceClass = USB_CLASS_COMM, | |
1207 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1208 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1209 | .driver_info = (unsigned long) &wwan_info, | |
1210 | }, | |
1211 | ||
f3a1ef9c PM |
1212 | /* Dell branded MBM devices like DW5550 */ |
1213 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1214 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1215 | .idVendor = 0x413c, | |
1216 | .bInterfaceClass = USB_CLASS_COMM, | |
1217 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1218 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1219 | .driver_info = (unsigned long) &wwan_info, | |
1220 | }, | |
1221 | ||
1222 | /* Toshiba branded MBM devices */ | |
1223 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1224 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1225 | .idVendor = 0x0930, | |
1226 | .bInterfaceClass = USB_CLASS_COMM, | |
1227 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1228 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1229 | .driver_info = (unsigned long) &wwan_info, | |
1230 | }, | |
1231 | ||
1f84eab4 BM |
1232 | /* tag Huawei devices as wwan */ |
1233 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
1234 | USB_CLASS_COMM, | |
1235 | USB_CDC_SUBCLASS_NCM, | |
1236 | USB_CDC_PROTO_NONE), | |
1237 | .driver_info = (unsigned long)&wwan_info, | |
1238 | }, | |
1239 | ||
bbc8d922 BM |
1240 | /* Huawei NCM devices disguised as vendor specific */ |
1241 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), | |
1242 | .driver_info = (unsigned long)&wwan_info, | |
1243 | }, | |
1244 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), | |
1245 | .driver_info = (unsigned long)&wwan_info, | |
1246 | }, | |
96316c59 BM |
1247 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76), |
1248 | .driver_info = (unsigned long)&wwan_info, | |
1249 | }, | |
bbc8d922 | 1250 | |
2f62d5aa WS |
1251 | /* Infineon(now Intel) HSPA Modem platform */ |
1252 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
1253 | USB_CLASS_COMM, | |
1254 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1255 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1256 | }, | |
1257 | ||
f94898ea DW |
1258 | /* Generic CDC-NCM devices */ |
1259 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
1260 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1261 | .driver_info = (unsigned long)&cdc_ncm_info, | |
1262 | }, | |
1263 | { | |
1264 | }, | |
1265 | }; | |
1266 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
1267 | ||
900d495a AO |
1268 | static struct usb_driver cdc_ncm_driver = { |
1269 | .name = "cdc_ncm", | |
1270 | .id_table = cdc_devs, | |
1271 | .probe = cdc_ncm_probe, | |
1272 | .disconnect = cdc_ncm_disconnect, | |
1273 | .suspend = usbnet_suspend, | |
1274 | .resume = usbnet_resume, | |
85e3c65f | 1275 | .reset_resume = usbnet_resume, |
900d495a | 1276 | .supports_autosuspend = 1, |
e1f12eb6 | 1277 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
1278 | }; |
1279 | ||
d632eb1b | 1280 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
1281 | |
1282 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1283 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1284 | MODULE_LICENSE("Dual BSD/GPL"); |