1/* 2 * cdc_ncm.c 3 * 4 * Copyright (C) ST-Ericsson 2010-2012 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/docs/devclass_docs/NCM10_012011.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/netdevice.h> 43#include <linux/ctype.h> 44#include <linux/etherdevice.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> 50#include <linux/hrtimer.h> 51#include <linux/atomic.h> 52#include <linux/usb/usbnet.h> 53#include <linux/usb/cdc.h> 54#include <linux/usb/cdc_ncm.h> 55 56#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 57static bool prefer_mbim = true; 58#else 59static bool prefer_mbim; 60#endif 61module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 62MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 63 64static void cdc_ncm_txpath_bh(unsigned long param); 65static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 66static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 67static struct usb_driver cdc_ncm_driver; 68 69struct cdc_ncm_stats { 70 char stat_string[ETH_GSTRING_LEN]; 71 int sizeof_stat; 72 int stat_offset; 73}; 74 75#define CDC_NCM_STAT(str, m) { \ 76 .stat_string = str, \ 77 .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ 78 .stat_offset = offsetof(struct cdc_ncm_ctx, m) } 79#define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) 80 81static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { 82 CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), 83 CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), 84 CDC_NCM_SIMPLE_STAT(tx_reason_timeout), 85 CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), 86 CDC_NCM_SIMPLE_STAT(tx_overhead), 87 CDC_NCM_SIMPLE_STAT(tx_ntbs), 88 CDC_NCM_SIMPLE_STAT(rx_overhead), 89 CDC_NCM_SIMPLE_STAT(rx_ntbs), 90}; 91 92static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) 93{ 94 switch (sset) { 95 case ETH_SS_STATS: 96 return ARRAY_SIZE(cdc_ncm_gstrings_stats); 97 default: 98 return -EOPNOTSUPP; 99 } 100} 101 102static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, 103 struct ethtool_stats __always_unused *stats, 104 u64 *data) 105{ 106 struct usbnet *dev = netdev_priv(netdev); 107 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 108 int i; 109 char *p = NULL; 110 111 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 112 p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; 113 data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; 114 } 115} 116 117static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) 118{ 119 u8 *p = data; 120 int i; 121 122 switch (stringset) { 123 case ETH_SS_STATS: 124 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 125 memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); 126 p += ETH_GSTRING_LEN; 127 } 128 } 129} 130 131static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); 132 133static const struct ethtool_ops cdc_ncm_ethtool_ops = { 134 .get_settings = usbnet_get_settings, 135 .set_settings = usbnet_set_settings, 136 .get_link = usbnet_get_link, 137 .nway_reset = usbnet_nway_reset, 138 .get_drvinfo = usbnet_get_drvinfo, 139 .get_msglevel = usbnet_get_msglevel, 140 .set_msglevel = usbnet_set_msglevel, 141 .get_ts_info = ethtool_op_get_ts_info, 142 .get_sset_count = cdc_ncm_get_sset_count, 143 .get_strings = cdc_ncm_get_strings, 144 .get_ethtool_stats = cdc_ncm_get_ethtool_stats, 145}; 146 147static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) 148{ 149 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 150 u32 val, max, min; 151 152 /* clamp new_rx to sane values */ 153 min = USB_CDC_NCM_NTB_MIN_IN_SIZE; 154 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 155 156 /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ 157 if (max < min) { 158 dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", 159 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); 160 max = min; 161 } 162 163 val = clamp_t(u32, new_rx, min, max); 164 if (val != new_rx) 165 dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); 166 167 return val; 168} 169 170static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) 171{ 172 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 173 u32 val, max, min; 174 175 /* clamp new_tx to sane values */ 176 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); 177 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 178 179 /* some devices set dwNtbOutMaxSize too low for the above default */ 180 min = min(min, max); 181 182 val = clamp_t(u32, new_tx, min, max); 183 if (val != new_tx) 184 dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); 185 186 return val; 187} 188 189static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) 190{ 191 struct usbnet *dev = netdev_priv(to_net_dev(d)); 192 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 193 194 return sprintf(buf, "%u\n", ctx->min_tx_pkt); 195} 196 197static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) 198{ 199 struct usbnet *dev = netdev_priv(to_net_dev(d)); 200 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 201 202 return sprintf(buf, "%u\n", ctx->rx_max); 203} 204 205static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) 206{ 207 struct usbnet *dev = netdev_priv(to_net_dev(d)); 208 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 209 210 return sprintf(buf, "%u\n", ctx->tx_max); 211} 212 213static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) 214{ 215 struct usbnet *dev = netdev_priv(to_net_dev(d)); 216 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 217 218 return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); 219} 220 221static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 222{ 223 struct usbnet *dev = netdev_priv(to_net_dev(d)); 224 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 225 unsigned long val; 226 227 /* no need to restrict values - anything from 0 to infinity is OK */ 228 if (kstrtoul(buf, 0, &val)) 229 return -EINVAL; 230 231 ctx->min_tx_pkt = val; 232 return len; 233} 234 235static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 236{ 237 struct usbnet *dev = netdev_priv(to_net_dev(d)); 238 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 239 unsigned long val; 240 241 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) 242 return -EINVAL; 243 244 cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); 245 return len; 246} 247 248static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 249{ 250 struct usbnet *dev = netdev_priv(to_net_dev(d)); 251 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 252 unsigned long val; 253 254 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) 255 return -EINVAL; 256 257 cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); 258 return len; 259} 260 261static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 262{ 263 struct usbnet *dev = netdev_priv(to_net_dev(d)); 264 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 265 ssize_t ret; 266 unsigned long val; 267 268 ret = kstrtoul(buf, 0, &val); 269 if (ret) 270 return ret; 271 if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) 272 return -EINVAL; 273 274 spin_lock_bh(&ctx->mtx); 275 ctx->timer_interval = val * NSEC_PER_USEC; 276 if (!ctx->timer_interval) 277 ctx->tx_timer_pending = 0; 278 spin_unlock_bh(&ctx->mtx); 279 return len; 280} 281 282static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); 283static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); 284static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); 285static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); 286 287#define NCM_PARM_ATTR(name, format, tocpu) \ 288static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ 289{ \ 290 struct usbnet *dev = netdev_priv(to_net_dev(d)); \ 291 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ 292 return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ 293} \ 294static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) 295 296NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); 297NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 298NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); 299NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); 300NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); 301NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); 302NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); 303NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); 304NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); 305NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); 306 307static struct attribute *cdc_ncm_sysfs_attrs[] = { 308 &dev_attr_min_tx_pkt.attr, 309 &dev_attr_rx_max.attr, 310 &dev_attr_tx_max.attr, 311 &dev_attr_tx_timer_usecs.attr, 312 &dev_attr_bmNtbFormatsSupported.attr, 313 &dev_attr_dwNtbInMaxSize.attr, 314 &dev_attr_wNdpInDivisor.attr, 315 &dev_attr_wNdpInPayloadRemainder.attr, 316 &dev_attr_wNdpInAlignment.attr, 317 &dev_attr_dwNtbOutMaxSize.attr, 318 &dev_attr_wNdpOutDivisor.attr, 319 &dev_attr_wNdpOutPayloadRemainder.attr, 320 &dev_attr_wNdpOutAlignment.attr, 321 &dev_attr_wNtbOutMaxDatagrams.attr, 322 NULL, 323}; 324 325static struct attribute_group cdc_ncm_sysfs_attr_group = { 326 .name = "cdc_ncm", 327 .attrs = cdc_ncm_sysfs_attrs, 328}; 329 330/* handle rx_max and tx_max changes */ 331static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) 332{ 333 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 334 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 335 u32 val; 336 337 val = cdc_ncm_check_rx_max(dev, new_rx); 338 339 /* inform device about NTB input size changes */ 340 if (val != ctx->rx_max) { 341 __le32 dwNtbInMaxSize = cpu_to_le32(val); 342 343 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); 344 345 /* tell device to use new size */ 346 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 347 USB_TYPE_CLASS | USB_DIR_OUT 348 | USB_RECIP_INTERFACE, 349 0, iface_no, &dwNtbInMaxSize, 4) < 0) 350 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 351 else 352 ctx->rx_max = val; 353 } 354 355 /* usbnet use these values for sizing rx queues */ 356 if (dev->rx_urb_size != ctx->rx_max) { 357 dev->rx_urb_size = ctx->rx_max; 358 if (netif_running(dev->net)) 359 usbnet_unlink_rx_urbs(dev); 360 } 361 362 val = cdc_ncm_check_tx_max(dev, new_tx); 363 if (val != ctx->tx_max) 364 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); 365 366 /* Adding a pad byte here if necessary simplifies the handling 367 * in cdc_ncm_fill_tx_frame, making tx_max always represent 368 * the real skb max size. 369 * 370 * We cannot use dev->maxpacket here because this is called from 371 * .bind which is called before usbnet sets up dev->maxpacket 372 */ 373 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 374 val % usb_maxpacket(dev->udev, dev->out, 1) == 0) 375 val++; 376 377 /* we might need to flush any pending tx buffers if running */ 378 if (netif_running(dev->net) && val > ctx->tx_max) { 379 netif_tx_lock_bh(dev->net); 380 usbnet_start_xmit(NULL, dev->net); 381 /* make sure tx_curr_skb is reallocated if it was empty */ 382 if (ctx->tx_curr_skb) { 383 dev_kfree_skb_any(ctx->tx_curr_skb); 384 ctx->tx_curr_skb = NULL; 385 } 386 ctx->tx_max = val; 387 netif_tx_unlock_bh(dev->net); 388 } else { 389 ctx->tx_max = val; 390 } 391 392 dev->hard_mtu = ctx->tx_max; 393 394 /* max qlen depend on hard_mtu and rx_urb_size */ 395 usbnet_update_max_qlen(dev); 396 397 /* never pad more than 3 full USB packets per transfer */ 398 ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), 399 CDC_NCM_MIN_TX_PKT, ctx->tx_max); 400} 401 402/* helpers for NCM and MBIM differences */ 403static u8 cdc_ncm_flags(struct usbnet *dev) 404{ 405 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 406 407 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 408 return ctx->mbim_desc->bmNetworkCapabilities; 409 if (ctx->func_desc) 410 return ctx->func_desc->bmNetworkCapabilities; 411 return 0; 412} 413 414static int cdc_ncm_eth_hlen(struct usbnet *dev) 415{ 416 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 417 return 0; 418 return ETH_HLEN; 419} 420 421static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) 422{ 423 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 424 return CDC_MBIM_MIN_DATAGRAM_SIZE; 425 return CDC_NCM_MIN_DATAGRAM_SIZE; 426} 427 428static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) 429{ 430 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 431 432 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 433 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 434 if (ctx->ether_desc) 435 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 436 return CDC_NCM_MAX_DATAGRAM_SIZE; 437} 438 439/* initial one-time device setup. MUST be called with the data interface 440 * in altsetting 0 441 */ 442static int cdc_ncm_init(struct usbnet *dev) 443{ 444 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 445 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 446 int err; 447 448 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 449 USB_TYPE_CLASS | USB_DIR_IN 450 |USB_RECIP_INTERFACE, 451 0, iface_no, &ctx->ncm_parm, 452 sizeof(ctx->ncm_parm)); 453 if (err < 0) { 454 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 455 return err; /* GET_NTB_PARAMETERS is required */ 456 } 457 458 /* set CRC Mode */ 459 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { 460 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); 461 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 462 USB_TYPE_CLASS | USB_DIR_OUT 463 | USB_RECIP_INTERFACE, 464 USB_CDC_NCM_CRC_NOT_APPENDED, 465 iface_no, NULL, 0); 466 if (err < 0) 467 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); 468 } 469 470 /* set NTB format, if both formats are supported. 471 * 472 * "The host shall only send this command while the NCM Data 473 * Interface is in alternate setting 0." 474 */ 475 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & 476 USB_CDC_NCM_NTB32_SUPPORTED) { 477 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); 478 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 479 USB_TYPE_CLASS | USB_DIR_OUT 480 | USB_RECIP_INTERFACE, 481 USB_CDC_NCM_NTB16_FORMAT, 482 iface_no, NULL, 0); 483 if (err < 0) 484 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); 485 } 486 487 /* set initial device values */ 488 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 489 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 490 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 491 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 492 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 493 /* devices prior to NCM Errata shall set this field to zero */ 494 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 495 496 dev_dbg(&dev->intf->dev, 497 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 498 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 499 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); 500 501 /* max count of tx datagrams */ 502 if ((ctx->tx_max_datagrams == 0) || 503 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 504 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 505 506 /* set up maximum NDP size */ 507 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); 508 509 /* initial coalescing timer interval */ 510 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; 511 512 return 0; 513} 514 515/* set a new max datagram size */ 516static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) 517{ 518 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 519 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 520 __le16 max_datagram_size; 521 u16 mbim_mtu; 522 int err; 523 524 /* set default based on descriptors */ 525 ctx->max_datagram_size = clamp_t(u32, new_size, 526 cdc_ncm_min_dgram_size(dev), 527 CDC_NCM_MAX_DATAGRAM_SIZE); 528 529 /* inform the device about the selected Max Datagram Size? */ 530 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 531 goto out; 532 533 /* read current mtu value from device */ 534 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 535 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 536 0, iface_no, &max_datagram_size, 2); 537 if (err < 0) { 538 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 539 goto out; 540 } 541 542 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 543 goto out; 544 545 max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 546 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 547 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 548 0, iface_no, &max_datagram_size, 2); 549 if (err < 0) 550 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 551 552out: 553 /* set MTU to max supported by the device if necessary */ 554 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); 555 556 /* do not exceed operater preferred MTU */ 557 if (ctx->mbim_extended_desc) { 558 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 559 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 560 dev->net->mtu = mbim_mtu; 561 } 562} 563 564static void cdc_ncm_fix_modulus(struct usbnet *dev) 565{ 566 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 567 u32 val; 568 569 /* 570 * verify that the structure alignment is: 571 * - power of two 572 * - not greater than the maximum transmit length 573 * - not less than four bytes 574 */ 575 val = ctx->tx_ndp_modulus; 576 577 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 578 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 579 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 580 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 581 } 582 583 /* 584 * verify that the payload alignment is: 585 * - power of two 586 * - not greater than the maximum transmit length 587 * - not less than four bytes 588 */ 589 val = ctx->tx_modulus; 590 591 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 592 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 593 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 594 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 595 } 596 597 /* verify the payload remainder */ 598 if (ctx->tx_remainder >= ctx->tx_modulus) { 599 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 600 ctx->tx_remainder = 0; 601 } 602 603 /* adjust TX-remainder according to NCM specification. */ 604 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & 605 (ctx->tx_modulus - 1)); 606} 607 608static int cdc_ncm_setup(struct usbnet *dev) 609{ 610 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 611 u32 def_rx, def_tx; 612 613 /* be conservative when selecting intial buffer size to 614 * increase the number of hosts this will work for 615 */ 616 def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, 617 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 618 def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, 619 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 620 621 /* clamp rx_max and tx_max and inform device */ 622 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); 623 624 /* sanitize the modulus and remainder values */ 625 cdc_ncm_fix_modulus(dev); 626 627 /* set max datagram size */ 628 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); 629 return 0; 630} 631 632static void 633cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 634{ 635 struct usb_host_endpoint *e, *in = NULL, *out = NULL; 636 u8 ep; 637 638 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 639 640 e = intf->cur_altsetting->endpoint + ep; 641 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 642 case USB_ENDPOINT_XFER_INT: 643 if (usb_endpoint_dir_in(&e->desc)) { 644 if (!dev->status) 645 dev->status = e; 646 } 647 break; 648 649 case USB_ENDPOINT_XFER_BULK: 650 if (usb_endpoint_dir_in(&e->desc)) { 651 if (!in) 652 in = e; 653 } else { 654 if (!out) 655 out = e; 656 } 657 break; 658 659 default: 660 break; 661 } 662 } 663 if (in && !dev->in) 664 dev->in = usb_rcvbulkpipe(dev->udev, 665 in->desc.bEndpointAddress & 666 USB_ENDPOINT_NUMBER_MASK); 667 if (out && !dev->out) 668 dev->out = usb_sndbulkpipe(dev->udev, 669 out->desc.bEndpointAddress & 670 USB_ENDPOINT_NUMBER_MASK); 671} 672 673static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 674{ 675 if (ctx == NULL) 676 return; 677 678 if (ctx->tx_rem_skb != NULL) { 679 dev_kfree_skb_any(ctx->tx_rem_skb); 680 ctx->tx_rem_skb = NULL; 681 } 682 683 if (ctx->tx_curr_skb != NULL) { 684 dev_kfree_skb_any(ctx->tx_curr_skb); 685 ctx->tx_curr_skb = NULL; 686 } 687 688 kfree(ctx->delayed_ndp16); 689 690 kfree(ctx); 691} 692 693/* we need to override the usbnet change_mtu ndo for two reasons: 694 * - respect the negotiated maximum datagram size 695 * - avoid unwanted changes to rx and tx buffers 696 */ 697int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) 698{ 699 struct usbnet *dev = netdev_priv(net); 700 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 701 int maxmtu = ctx->max_datagram_size - cdc_ncm_eth_hlen(dev); 702 703 if (new_mtu <= 0 || new_mtu > maxmtu) 704 return -EINVAL; 705 net->mtu = new_mtu; 706 return 0; 707} 708EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); 709 710static const struct net_device_ops cdc_ncm_netdev_ops = { 711 .ndo_open = usbnet_open, 712 .ndo_stop = usbnet_stop, 713 .ndo_start_xmit = usbnet_start_xmit, 714 .ndo_tx_timeout = usbnet_tx_timeout, 715 .ndo_change_mtu = cdc_ncm_change_mtu, 716 .ndo_set_mac_address = eth_mac_addr, 717 .ndo_validate_addr = eth_validate_addr, 718}; 719 720int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) 721{ 722 struct cdc_ncm_ctx *ctx; 723 struct usb_driver *driver; 724 u8 *buf; 725 int len; 726 int temp; 727 u8 iface_no; 728 struct usb_cdc_parsed_header hdr; 729 730 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 731 if (!ctx) 732 return -ENOMEM; 733 734 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 735 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 736 ctx->bh.data = (unsigned long)dev; 737 ctx->bh.func = cdc_ncm_txpath_bh; 738 atomic_set(&ctx->stop, 0); 739 spin_lock_init(&ctx->mtx); 740 741 /* store ctx pointer in device data field */ 742 dev->data[0] = (unsigned long)ctx; 743 744 /* only the control interface can be successfully probed */ 745 ctx->control = intf; 746 747 /* get some pointers */ 748 driver = driver_of(intf); 749 buf = intf->cur_altsetting->extra; 750 len = intf->cur_altsetting->extralen; 751 752 /* parse through descriptors associated with control interface */ 753 cdc_parse_cdc_header(&hdr, intf, buf, len); 754 755 if (hdr.usb_cdc_union_desc) 756 ctx->data = usb_ifnum_to_if(dev->udev, 757 hdr.usb_cdc_union_desc->bSlaveInterface0); 758 ctx->ether_desc = hdr.usb_cdc_ether_desc; 759 ctx->func_desc = hdr.usb_cdc_ncm_desc; 760 ctx->mbim_desc = hdr.usb_cdc_mbim_desc; 761 ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; 762 763 /* some buggy devices have an IAD but no CDC Union */ 764 if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 765 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 766 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 767 } 768 769 /* check if we got everything */ 770 if (!ctx->data) { 771 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); 772 goto error; 773 } 774 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { 775 if (!ctx->mbim_desc) { 776 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); 777 goto error; 778 } 779 } else { 780 if (!ctx->ether_desc || !ctx->func_desc) { 781 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); 782 goto error; 783 } 784 } 785 786 /* claim data interface, if different from control */ 787 if (ctx->data != ctx->control) { 788 temp = usb_driver_claim_interface(driver, ctx->data, dev); 789 if (temp) { 790 dev_dbg(&intf->dev, "failed to claim data intf\n"); 791 goto error; 792 } 793 } 794 795 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 796 797 /* Reset data interface. Some devices will not reset properly 798 * unless they are configured first. Toggle the altsetting to 799 * force a reset 800 */ 801 usb_set_interface(dev->udev, iface_no, data_altsetting); 802 temp = usb_set_interface(dev->udev, iface_no, 0); 803 if (temp) { 804 dev_dbg(&intf->dev, "set interface failed\n"); 805 goto error2; 806 } 807 808 /* initialize basic device settings */ 809 if (cdc_ncm_init(dev)) 810 goto error2; 811 812 /* configure data interface */ 813 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 814 if (temp) { 815 dev_dbg(&intf->dev, "set interface failed\n"); 816 goto error2; 817 } 818 819 cdc_ncm_find_endpoints(dev, ctx->data); 820 cdc_ncm_find_endpoints(dev, ctx->control); 821 if (!dev->in || !dev->out || !dev->status) { 822 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 823 goto error2; 824 } 825 826 usb_set_intfdata(ctx->data, dev); 827 usb_set_intfdata(ctx->control, dev); 828 829 if (ctx->ether_desc) { 830 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 831 if (temp) { 832 dev_dbg(&intf->dev, "failed to get mac address\n"); 833 goto error2; 834 } 835 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 836 } 837 838 /* finish setting up the device specific data */ 839 cdc_ncm_setup(dev); 840 841 /* Device-specific flags */ 842 ctx->drvflags = drvflags; 843 844 /* Allocate the delayed NDP if needed. */ 845 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 846 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 847 if (!ctx->delayed_ndp16) 848 goto error2; 849 dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 850 } 851 852 /* override ethtool_ops */ 853 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 854 855 /* add our sysfs attrs */ 856 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 857 858 /* must handle MTU changes */ 859 dev->net->netdev_ops = &cdc_ncm_netdev_ops; 860 861 return 0; 862 863error2: 864 usb_set_intfdata(ctx->control, NULL); 865 usb_set_intfdata(ctx->data, NULL); 866 if (ctx->data != ctx->control) 867 usb_driver_release_interface(driver, ctx->data); 868error: 869 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 870 dev->data[0] = 0; 871 dev_info(&intf->dev, "bind() failure\n"); 872 return -ENODEV; 873} 874EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 875 876void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 877{ 878 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 879 struct usb_driver *driver = driver_of(intf); 880 881 if (ctx == NULL) 882 return; /* no setup */ 883 884 atomic_set(&ctx->stop, 1); 885 886 if (hrtimer_active(&ctx->tx_timer)) 887 hrtimer_cancel(&ctx->tx_timer); 888 889 tasklet_kill(&ctx->bh); 890 891 /* handle devices with combined control and data interface */ 892 if (ctx->control == ctx->data) 893 ctx->data = NULL; 894 895 /* disconnect master --> disconnect slave */ 896 if (intf == ctx->control && ctx->data) { 897 usb_set_intfdata(ctx->data, NULL); 898 usb_driver_release_interface(driver, ctx->data); 899 ctx->data = NULL; 900 901 } else if (intf == ctx->data && ctx->control) { 902 usb_set_intfdata(ctx->control, NULL); 903 usb_driver_release_interface(driver, ctx->control); 904 ctx->control = NULL; 905 } 906 907 usb_set_intfdata(intf, NULL); 908 cdc_ncm_free(ctx); 909} 910EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 911 912/* Return the number of the MBIM control interface altsetting iff it 913 * is preferred and available, 914 */ 915u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 916{ 917 struct usb_host_interface *alt; 918 919 /* The MBIM spec defines a NCM compatible default altsetting, 920 * which we may have matched: 921 * 922 * "Functions that implement both NCM 1.0 and MBIM (an 923 * ���NCM/MBIM function���) according to this recommendation 924 * shall provide two alternate settings for the 925 * Communication Interface. Alternate setting 0, and the 926 * associated class and endpoint descriptors, shall be 927 * constructed according to the rules given for the 928 * Communication Interface in section 5 of [USBNCM10]. 929 * Alternate setting 1, and the associated class and 930 * endpoint descriptors, shall be constructed according to 931 * the rules given in section 6 (USB Device Model) of this 932 * specification." 933 */ 934 if (intf->num_altsetting < 2) 935 return intf->cur_altsetting->desc.bAlternateSetting; 936 937 if (prefer_mbim) { 938 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 939 if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 940 return CDC_NCM_COMM_ALTSETTING_MBIM; 941 } 942 return CDC_NCM_COMM_ALTSETTING_NCM; 943} 944EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 945 946static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 947{ 948 int ret; 949 950 /* MBIM backwards compatible function? */ 951 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 952 return -ENODEV; 953 954 /* The NCM data altsetting is fixed, so we hard-coded it. 955 * Additionally, generic NCM devices are assumed to accept arbitrarily 956 * placed NDP. 957 */ 958 ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 959 960 /* 961 * We should get an event when network connection is "connected" or 962 * "disconnected". Set network connection in "disconnected" state 963 * (carrier is OFF) during attach, so the IP network stack does not 964 * start IPv6 negotiation and more. 965 */ 966 usbnet_link_change(dev, 0, 0); 967 return ret; 968} 969 970static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 971{ 972 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 973 974 if (skb->len + align > max) 975 align = max - skb->len; 976 if (align && skb_tailroom(skb) >= align) 977 memset(skb_put(skb, align), 0, align); 978} 979 980/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 981 * allocating a new one within skb 982 */ 983static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 984{ 985 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 986 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 987 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 988 989 /* If NDP should be moved to the end of the NCM package, we can't follow the 990 * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 991 * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 992 */ 993 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 994 if (ctx->delayed_ndp16->dwSignature == sign) 995 return ctx->delayed_ndp16; 996 997 /* We can only push a single NDP to the end. Return 998 * NULL to send what we've already got and queue this 999 * skb for later. 1000 */ 1001 else if (ctx->delayed_ndp16->dwSignature) 1002 return NULL; 1003 } 1004 1005 /* follow the chain of NDPs, looking for a match */ 1006 while (ndpoffset) { 1007 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 1008 if (ndp16->dwSignature == sign) 1009 return ndp16; 1010 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1011 } 1012 1013 /* align new NDP */ 1014 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1015 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1016 1017 /* verify that there is room for the NDP and the datagram (reserve) */ 1018 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) 1019 return NULL; 1020 1021 /* link to it */ 1022 if (ndp16) 1023 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 1024 else 1025 nth16->wNdpIndex = cpu_to_le16(skb->len); 1026 1027 /* push a new empty NDP */ 1028 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1029 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); 1030 else 1031 ndp16 = ctx->delayed_ndp16; 1032 1033 ndp16->dwSignature = sign; 1034 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 1035 return ndp16; 1036} 1037 1038struct sk_buff * 1039cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 1040{ 1041 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1042 struct usb_cdc_ncm_nth16 *nth16; 1043 struct usb_cdc_ncm_ndp16 *ndp16; 1044 struct sk_buff *skb_out; 1045 u16 n = 0, index, ndplen; 1046 u8 ready2send = 0; 1047 u32 delayed_ndp_size; 1048 1049 /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 1050 * accordingly. Otherwise, we should check here. 1051 */ 1052 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 1053 delayed_ndp_size = ctx->max_ndp_size; 1054 else 1055 delayed_ndp_size = 0; 1056 1057 /* if there is a remaining skb, it gets priority */ 1058 if (skb != NULL) { 1059 swap(skb, ctx->tx_rem_skb); 1060 swap(sign, ctx->tx_rem_sign); 1061 } else { 1062 ready2send = 1; 1063 } 1064 1065 /* check if we are resuming an OUT skb */ 1066 skb_out = ctx->tx_curr_skb; 1067 1068 /* allocate a new OUT skb */ 1069 if (!skb_out) { 1070 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 1071 if (skb_out == NULL) { 1072 if (skb != NULL) { 1073 dev_kfree_skb_any(skb); 1074 dev->net->stats.tx_dropped++; 1075 } 1076 goto exit_no_skb; 1077 } 1078 /* fill out the initial 16-bit NTB header */ 1079 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 1080 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 1081 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 1082 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 1083 1084 /* count total number of frames in this NTB */ 1085 ctx->tx_curr_frame_num = 0; 1086 1087 /* recent payload counter for this skb_out */ 1088 ctx->tx_curr_frame_payload = 0; 1089 } 1090 1091 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1092 /* send any remaining skb first */ 1093 if (skb == NULL) { 1094 skb = ctx->tx_rem_skb; 1095 sign = ctx->tx_rem_sign; 1096 ctx->tx_rem_skb = NULL; 1097 1098 /* check for end of skb */ 1099 if (skb == NULL) 1100 break; 1101 } 1102 1103 /* get the appropriate NDP for this skb */ 1104 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1105 1106 /* align beginning of next frame */ 1107 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 1108 1109 /* check if we had enough room left for both NDP and frame */ 1110 if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { 1111 if (n == 0) { 1112 /* won't fit, MTU problem? */ 1113 dev_kfree_skb_any(skb); 1114 skb = NULL; 1115 dev->net->stats.tx_dropped++; 1116 } else { 1117 /* no room for skb - store for later */ 1118 if (ctx->tx_rem_skb != NULL) { 1119 dev_kfree_skb_any(ctx->tx_rem_skb); 1120 dev->net->stats.tx_dropped++; 1121 } 1122 ctx->tx_rem_skb = skb; 1123 ctx->tx_rem_sign = sign; 1124 skb = NULL; 1125 ready2send = 1; 1126 ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1127 } 1128 break; 1129 } 1130 1131 /* calculate frame number withing this NDP */ 1132 ndplen = le16_to_cpu(ndp16->wLength); 1133 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1134 1135 /* OK, add this skb */ 1136 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 1137 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 1138 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 1139 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 1140 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1141 dev_kfree_skb_any(skb); 1142 skb = NULL; 1143 1144 /* send now if this NDP is full */ 1145 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1146 ready2send = 1; 1147 ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1148 break; 1149 } 1150 } 1151 1152 /* free up any dangling skb */ 1153 if (skb != NULL) { 1154 dev_kfree_skb_any(skb); 1155 skb = NULL; 1156 dev->net->stats.tx_dropped++; 1157 } 1158 1159 ctx->tx_curr_frame_num = n; 1160 1161 if (n == 0) { 1162 /* wait for more frames */ 1163 /* push variables */ 1164 ctx->tx_curr_skb = skb_out; 1165 goto exit_no_skb; 1166 1167 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1168 /* wait for more frames */ 1169 /* push variables */ 1170 ctx->tx_curr_skb = skb_out; 1171 /* set the pending count */ 1172 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1173 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1174 goto exit_no_skb; 1175 1176 } else { 1177 if (n == ctx->tx_max_datagrams) 1178 ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1179 /* frame goes out */ 1180 /* variables will be reset at next call */ 1181 } 1182 1183 /* If requested, put NDP at end of frame. */ 1184 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 1185 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1186 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1187 nth16->wNdpIndex = cpu_to_le16(skb_out->len); 1188 memcpy(skb_put(skb_out, ctx->max_ndp_size), ctx->delayed_ndp16, ctx->max_ndp_size); 1189 1190 /* Zero out delayed NDP - signature checking will naturally fail. */ 1191 ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 1192 } 1193 1194 /* If collected data size is less or equal ctx->min_tx_pkt 1195 * bytes, we send buffers as it is. If we get more data, it 1196 * would be more efficient for USB HS mobile device with DMA 1197 * engine to receive a full size NTB, than canceling DMA 1198 * transfer and receiving a short packet. 1199 * 1200 * This optimization support is pointless if we end up sending 1201 * a ZLP after full sized NTBs. 1202 */ 1203 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 1204 skb_out->len > ctx->min_tx_pkt) 1205 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 1206 ctx->tx_max - skb_out->len); 1207 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) 1208 *skb_put(skb_out, 1) = 0; /* force short packet */ 1209 1210 /* set final frame length */ 1211 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1212 nth16->wBlockLength = cpu_to_le16(skb_out->len); 1213 1214 /* return skb */ 1215 ctx->tx_curr_skb = NULL; 1216 1217 /* keep private stats: framing overhead and number of NTBs */ 1218 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1219 ctx->tx_ntbs++; 1220 1221 /* usbnet will count all the framing overhead by default. 1222 * Adjust the stats so that the tx_bytes counter show real 1223 * payload data instead. 1224 */ 1225 usbnet_set_skb_tx_stats(skb_out, n, 1226 (long)ctx->tx_curr_frame_payload - skb_out->len); 1227 1228 return skb_out; 1229 1230exit_no_skb: 1231 /* Start timer, if there is a remaining non-empty skb */ 1232 if (ctx->tx_curr_skb != NULL && n > 0) 1233 cdc_ncm_tx_timeout_start(ctx); 1234 return NULL; 1235} 1236EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1237 1238static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1239{ 1240 /* start timer, if not already started */ 1241 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1242 hrtimer_start(&ctx->tx_timer, 1243 ktime_set(0, ctx->timer_interval), 1244 HRTIMER_MODE_REL); 1245} 1246 1247static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1248{ 1249 struct cdc_ncm_ctx *ctx = 1250 container_of(timer, struct cdc_ncm_ctx, tx_timer); 1251 1252 if (!atomic_read(&ctx->stop)) 1253 tasklet_schedule(&ctx->bh); 1254 return HRTIMER_NORESTART; 1255} 1256 1257static void cdc_ncm_txpath_bh(unsigned long param) 1258{ 1259 struct usbnet *dev = (struct usbnet *)param; 1260 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1261 1262 spin_lock_bh(&ctx->mtx); 1263 if (ctx->tx_timer_pending != 0) { 1264 ctx->tx_timer_pending--; 1265 cdc_ncm_tx_timeout_start(ctx); 1266 spin_unlock_bh(&ctx->mtx); 1267 } else if (dev->net != NULL) { 1268 ctx->tx_reason_timeout++; /* count reason for transmitting */ 1269 spin_unlock_bh(&ctx->mtx); 1270 netif_tx_lock_bh(dev->net); 1271 usbnet_start_xmit(NULL, dev->net); 1272 netif_tx_unlock_bh(dev->net); 1273 } else { 1274 spin_unlock_bh(&ctx->mtx); 1275 } 1276} 1277 1278struct sk_buff * 1279cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1280{ 1281 struct sk_buff *skb_out; 1282 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1283 1284 /* 1285 * The Ethernet API we are using does not support transmitting 1286 * multiple Ethernet frames in a single call. This driver will 1287 * accumulate multiple Ethernet frames and send out a larger 1288 * USB frame when the USB buffer is full or when a single jiffies 1289 * timeout happens. 1290 */ 1291 if (ctx == NULL) 1292 goto error; 1293 1294 spin_lock_bh(&ctx->mtx); 1295 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 1296 spin_unlock_bh(&ctx->mtx); 1297 return skb_out; 1298 1299error: 1300 if (skb != NULL) 1301 dev_kfree_skb_any(skb); 1302 1303 return NULL; 1304} 1305EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1306 1307/* verify NTB header and return offset of first NDP, or negative error */ 1308int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1309{ 1310 struct usbnet *dev = netdev_priv(skb_in->dev); 1311 struct usb_cdc_ncm_nth16 *nth16; 1312 int len; 1313 int ret = -EINVAL; 1314 1315 if (ctx == NULL) 1316 goto error; 1317 1318 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1319 sizeof(struct usb_cdc_ncm_ndp16))) { 1320 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1321 goto error; 1322 } 1323 1324 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1325 1326 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 1327 netif_dbg(dev, rx_err, dev->net, 1328 "invalid NTH16 signature <%#010x>\n", 1329 le32_to_cpu(nth16->dwSignature)); 1330 goto error; 1331 } 1332 1333 len = le16_to_cpu(nth16->wBlockLength); 1334 if (len > ctx->rx_max) { 1335 netif_dbg(dev, rx_err, dev->net, 1336 "unsupported NTB block length %u/%u\n", len, 1337 ctx->rx_max); 1338 goto error; 1339 } 1340 1341 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1342 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1343 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1344 netif_dbg(dev, rx_err, dev->net, 1345 "sequence number glitch prev=%d curr=%d\n", 1346 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1347 } 1348 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1349 1350 ret = le16_to_cpu(nth16->wNdpIndex); 1351error: 1352 return ret; 1353} 1354EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1355 1356/* verify NDP header and return number of datagrams, or negative error */ 1357int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1358{ 1359 struct usbnet *dev = netdev_priv(skb_in->dev); 1360 struct usb_cdc_ncm_ndp16 *ndp16; 1361 int ret = -EINVAL; 1362 1363 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1364 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1365 ndpoffset); 1366 goto error; 1367 } 1368 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1369 1370 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1371 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1372 le16_to_cpu(ndp16->wLength)); 1373 goto error; 1374 } 1375 1376 ret = ((le16_to_cpu(ndp16->wLength) - 1377 sizeof(struct usb_cdc_ncm_ndp16)) / 1378 sizeof(struct usb_cdc_ncm_dpe16)); 1379 ret--; /* we process NDP entries except for the last one */ 1380 1381 if ((sizeof(struct usb_cdc_ncm_ndp16) + 1382 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1383 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1384 ret = -EINVAL; 1385 } 1386 1387error: 1388 return ret; 1389} 1390EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1391 1392int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1393{ 1394 struct sk_buff *skb; 1395 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1396 int len; 1397 int nframes; 1398 int x; 1399 int offset; 1400 struct usb_cdc_ncm_ndp16 *ndp16; 1401 struct usb_cdc_ncm_dpe16 *dpe16; 1402 int ndpoffset; 1403 int loopcount = 50; /* arbitrary max preventing infinite loop */ 1404 u32 payload = 0; 1405 1406 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 1407 if (ndpoffset < 0) 1408 goto error; 1409 1410next_ndp: 1411 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1412 if (nframes < 0) 1413 goto error; 1414 1415 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1416 1417 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 1418 netif_dbg(dev, rx_err, dev->net, 1419 "invalid DPT16 signature <%#010x>\n", 1420 le32_to_cpu(ndp16->dwSignature)); 1421 goto err_ndp; 1422 } 1423 dpe16 = ndp16->dpe16; 1424 1425 for (x = 0; x < nframes; x++, dpe16++) { 1426 offset = le16_to_cpu(dpe16->wDatagramIndex); 1427 len = le16_to_cpu(dpe16->wDatagramLength); 1428 1429 /* 1430 * CDC NCM ch. 3.7 1431 * All entries after first NULL entry are to be ignored 1432 */ 1433 if ((offset == 0) || (len == 0)) { 1434 if (!x) 1435 goto err_ndp; /* empty NTB */ 1436 break; 1437 } 1438 1439 /* sanity checking */ 1440 if (((offset + len) > skb_in->len) || 1441 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1442 netif_dbg(dev, rx_err, dev->net, 1443 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1444 x, offset, len, skb_in); 1445 if (!x) 1446 goto err_ndp; 1447 break; 1448 1449 } else { 1450 /* create a fresh copy to reduce truesize */ 1451 skb = netdev_alloc_skb_ip_align(dev->net, len); 1452 if (!skb) 1453 goto error; 1454 memcpy(skb_put(skb, len), skb_in->data + offset, len); 1455 usbnet_skb_return(dev, skb); 1456 payload += len; /* count payload bytes in this NTB */ 1457 } 1458 } 1459err_ndp: 1460 /* are there more NDPs to process? */ 1461 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1462 if (ndpoffset && loopcount--) 1463 goto next_ndp; 1464 1465 /* update stats */ 1466 ctx->rx_overhead += skb_in->len - payload; 1467 ctx->rx_ntbs++; 1468 1469 return 1; 1470error: 1471 return 0; 1472} 1473EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1474 1475static void 1476cdc_ncm_speed_change(struct usbnet *dev, 1477 struct usb_cdc_speed_change *data) 1478{ 1479 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1480 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1481 1482 /* 1483 * Currently the USB-NET API does not support reporting the actual 1484 * device speed. Do print it instead. 1485 */ 1486 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1487 netif_info(dev, link, dev->net, 1488 "%u mbit/s downlink %u mbit/s uplink\n", 1489 (unsigned int)(rx_speed / 1000000U), 1490 (unsigned int)(tx_speed / 1000000U)); 1491 } else { 1492 netif_info(dev, link, dev->net, 1493 "%u kbit/s downlink %u kbit/s uplink\n", 1494 (unsigned int)(rx_speed / 1000U), 1495 (unsigned int)(tx_speed / 1000U)); 1496 } 1497} 1498 1499static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1500{ 1501 struct cdc_ncm_ctx *ctx; 1502 struct usb_cdc_notification *event; 1503 1504 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1505 1506 if (urb->actual_length < sizeof(*event)) 1507 return; 1508 1509 /* test for split data in 8-byte chunks */ 1510 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1511 cdc_ncm_speed_change(dev, 1512 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1513 return; 1514 } 1515 1516 event = urb->transfer_buffer; 1517 1518 switch (event->bNotificationType) { 1519 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1520 /* 1521 * According to the CDC NCM specification ch.7.1 1522 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1523 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1524 */ 1525 netif_info(dev, link, dev->net, 1526 "network connection: %sconnected\n", 1527 !!event->wValue ? "" : "dis"); 1528 usbnet_link_change(dev, !!event->wValue, 0); 1529 break; 1530 1531 case USB_CDC_NOTIFY_SPEED_CHANGE: 1532 if (urb->actual_length < (sizeof(*event) + 1533 sizeof(struct usb_cdc_speed_change))) 1534 set_bit(EVENT_STS_SPLIT, &dev->flags); 1535 else 1536 cdc_ncm_speed_change(dev, 1537 (struct usb_cdc_speed_change *)&event[1]); 1538 break; 1539 1540 default: 1541 dev_dbg(&dev->udev->dev, 1542 "NCM: unexpected notification 0x%02x!\n", 1543 event->bNotificationType); 1544 break; 1545 } 1546} 1547 1548static const struct driver_info cdc_ncm_info = { 1549 .description = "CDC NCM", 1550 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1551 .bind = cdc_ncm_bind, 1552 .unbind = cdc_ncm_unbind, 1553 .manage_power = usbnet_manage_power, 1554 .status = cdc_ncm_status, 1555 .rx_fixup = cdc_ncm_rx_fixup, 1556 .tx_fixup = cdc_ncm_tx_fixup, 1557}; 1558 1559/* Same as cdc_ncm_info, but with FLAG_WWAN */ 1560static const struct driver_info wwan_info = { 1561 .description = "Mobile Broadband Network Device", 1562 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1563 | FLAG_WWAN, 1564 .bind = cdc_ncm_bind, 1565 .unbind = cdc_ncm_unbind, 1566 .manage_power = usbnet_manage_power, 1567 .status = cdc_ncm_status, 1568 .rx_fixup = cdc_ncm_rx_fixup, 1569 .tx_fixup = cdc_ncm_tx_fixup, 1570}; 1571 1572/* Same as wwan_info, but with FLAG_NOARP */ 1573static const struct driver_info wwan_noarp_info = { 1574 .description = "Mobile Broadband Network Device (NO ARP)", 1575 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1576 | FLAG_WWAN | FLAG_NOARP, 1577 .bind = cdc_ncm_bind, 1578 .unbind = cdc_ncm_unbind, 1579 .manage_power = usbnet_manage_power, 1580 .status = cdc_ncm_status, 1581 .rx_fixup = cdc_ncm_rx_fixup, 1582 .tx_fixup = cdc_ncm_tx_fixup, 1583}; 1584 1585static const struct usb_device_id cdc_devs[] = { 1586 /* Ericsson MBM devices like F5521gw */ 1587 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1588 | USB_DEVICE_ID_MATCH_VENDOR, 1589 .idVendor = 0x0bdb, 1590 .bInterfaceClass = USB_CLASS_COMM, 1591 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1592 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1593 .driver_info = (unsigned long) &wwan_info, 1594 }, 1595 1596 /* DW5812 LTE Verizon Mobile Broadband Card 1597 * Unlike DW5550 this device requires FLAG_NOARP 1598 */ 1599 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, 1600 USB_CLASS_COMM, 1601 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1602 .driver_info = (unsigned long)&wwan_noarp_info, 1603 }, 1604 1605 /* DW5813 LTE AT&T Mobile Broadband Card 1606 * Unlike DW5550 this device requires FLAG_NOARP 1607 */ 1608 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, 1609 USB_CLASS_COMM, 1610 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1611 .driver_info = (unsigned long)&wwan_noarp_info, 1612 }, 1613 1614 /* Dell branded MBM devices like DW5550 */ 1615 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1616 | USB_DEVICE_ID_MATCH_VENDOR, 1617 .idVendor = 0x413c, 1618 .bInterfaceClass = USB_CLASS_COMM, 1619 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1620 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1621 .driver_info = (unsigned long) &wwan_info, 1622 }, 1623 1624 /* Toshiba branded MBM devices */ 1625 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1626 | USB_DEVICE_ID_MATCH_VENDOR, 1627 .idVendor = 0x0930, 1628 .bInterfaceClass = USB_CLASS_COMM, 1629 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1630 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1631 .driver_info = (unsigned long) &wwan_info, 1632 }, 1633 1634 /* tag Huawei devices as wwan */ 1635 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1636 USB_CLASS_COMM, 1637 USB_CDC_SUBCLASS_NCM, 1638 USB_CDC_PROTO_NONE), 1639 .driver_info = (unsigned long)&wwan_info, 1640 }, 1641 1642 /* Infineon(now Intel) HSPA Modem platform */ 1643 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1644 USB_CLASS_COMM, 1645 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1646 .driver_info = (unsigned long)&wwan_noarp_info, 1647 }, 1648 1649 /* Generic CDC-NCM devices */ 1650 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1651 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1652 .driver_info = (unsigned long)&cdc_ncm_info, 1653 }, 1654 { 1655 }, 1656}; 1657MODULE_DEVICE_TABLE(usb, cdc_devs); 1658 1659static struct usb_driver cdc_ncm_driver = { 1660 .name = "cdc_ncm", 1661 .id_table = cdc_devs, 1662 .probe = usbnet_probe, 1663 .disconnect = usbnet_disconnect, 1664 .suspend = usbnet_suspend, 1665 .resume = usbnet_resume, 1666 .reset_resume = usbnet_resume, 1667 .supports_autosuspend = 1, 1668 .disable_hub_initiated_lpm = 1, 1669}; 1670 1671module_usb_driver(cdc_ncm_driver); 1672 1673MODULE_AUTHOR("Hans Petter Selasky"); 1674MODULE_DESCRIPTION("USB CDC NCM host driver"); 1675MODULE_LICENSE("Dual BSD/GPL"); 1676