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) 57 static bool prefer_mbim = true; 58 #else 59 static bool prefer_mbim; 60 #endif 61 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 62 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 63 64 static void cdc_ncm_txpath_bh(unsigned long param); 65 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 66 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 67 static struct usb_driver cdc_ncm_driver; 68 69 struct 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 81 static 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 92 static 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 } 101 102 static 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 } 116 117 static 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 } 130 131 static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); 132 133 static 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 }; 146 147 static 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 } 169 170 static 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 } 188 189 static 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 } 196 197 static 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 } 204 205 static 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 } 212 213 static 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 } 220 221 static 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 } 234 235 static 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 } 247 248 static 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 } 260 261 static 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 } 281 282 static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); 283 static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); 284 static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); 285 static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); 286 287 static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) 288 { 289 struct usbnet *dev = netdev_priv(to_net_dev(d)); 290 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 291 292 return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); 293 } 294 295 static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 296 { 297 struct usbnet *dev = netdev_priv(to_net_dev(d)); 298 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 299 bool enable; 300 301 if (strtobool(buf, &enable)) 302 return -EINVAL; 303 304 /* no change? */ 305 if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 306 return len; 307 308 if (enable && !ctx->delayed_ndp16) { 309 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 310 if (!ctx->delayed_ndp16) 311 return -ENOMEM; 312 } 313 314 /* flush pending data before changing flag */ 315 netif_tx_lock_bh(dev->net); 316 usbnet_start_xmit(NULL, dev->net); 317 spin_lock_bh(&ctx->mtx); 318 if (enable) 319 ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; 320 else 321 ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; 322 spin_unlock_bh(&ctx->mtx); 323 netif_tx_unlock_bh(dev->net); 324 325 return len; 326 } 327 static DEVICE_ATTR_RW(ndp_to_end); 328 329 #define NCM_PARM_ATTR(name, format, tocpu) \ 330 static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ 331 { \ 332 struct usbnet *dev = netdev_priv(to_net_dev(d)); \ 333 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ 334 return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ 335 } \ 336 static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) 337 338 NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); 339 NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 340 NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); 341 NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); 342 NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); 343 NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); 344 NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); 345 NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); 346 NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); 347 NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); 348 349 static struct attribute *cdc_ncm_sysfs_attrs[] = { 350 &dev_attr_min_tx_pkt.attr, 351 &dev_attr_ndp_to_end.attr, 352 &dev_attr_rx_max.attr, 353 &dev_attr_tx_max.attr, 354 &dev_attr_tx_timer_usecs.attr, 355 &dev_attr_bmNtbFormatsSupported.attr, 356 &dev_attr_dwNtbInMaxSize.attr, 357 &dev_attr_wNdpInDivisor.attr, 358 &dev_attr_wNdpInPayloadRemainder.attr, 359 &dev_attr_wNdpInAlignment.attr, 360 &dev_attr_dwNtbOutMaxSize.attr, 361 &dev_attr_wNdpOutDivisor.attr, 362 &dev_attr_wNdpOutPayloadRemainder.attr, 363 &dev_attr_wNdpOutAlignment.attr, 364 &dev_attr_wNtbOutMaxDatagrams.attr, 365 NULL, 366 }; 367 368 static struct attribute_group cdc_ncm_sysfs_attr_group = { 369 .name = "cdc_ncm", 370 .attrs = cdc_ncm_sysfs_attrs, 371 }; 372 373 /* handle rx_max and tx_max changes */ 374 static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) 375 { 376 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 377 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 378 u32 val; 379 380 val = cdc_ncm_check_rx_max(dev, new_rx); 381 382 /* inform device about NTB input size changes */ 383 if (val != ctx->rx_max) { 384 __le32 dwNtbInMaxSize = cpu_to_le32(val); 385 386 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); 387 388 /* tell device to use new size */ 389 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 390 USB_TYPE_CLASS | USB_DIR_OUT 391 | USB_RECIP_INTERFACE, 392 0, iface_no, &dwNtbInMaxSize, 4) < 0) 393 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 394 else 395 ctx->rx_max = val; 396 } 397 398 /* usbnet use these values for sizing rx queues */ 399 if (dev->rx_urb_size != ctx->rx_max) { 400 dev->rx_urb_size = ctx->rx_max; 401 if (netif_running(dev->net)) 402 usbnet_unlink_rx_urbs(dev); 403 } 404 405 val = cdc_ncm_check_tx_max(dev, new_tx); 406 if (val != ctx->tx_max) 407 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); 408 409 /* Adding a pad byte here if necessary simplifies the handling 410 * in cdc_ncm_fill_tx_frame, making tx_max always represent 411 * the real skb max size. 412 * 413 * We cannot use dev->maxpacket here because this is called from 414 * .bind which is called before usbnet sets up dev->maxpacket 415 */ 416 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 417 val % usb_maxpacket(dev->udev, dev->out, 1) == 0) 418 val++; 419 420 /* we might need to flush any pending tx buffers if running */ 421 if (netif_running(dev->net) && val > ctx->tx_max) { 422 netif_tx_lock_bh(dev->net); 423 usbnet_start_xmit(NULL, dev->net); 424 /* make sure tx_curr_skb is reallocated if it was empty */ 425 if (ctx->tx_curr_skb) { 426 dev_kfree_skb_any(ctx->tx_curr_skb); 427 ctx->tx_curr_skb = NULL; 428 } 429 ctx->tx_max = val; 430 netif_tx_unlock_bh(dev->net); 431 } else { 432 ctx->tx_max = val; 433 } 434 435 dev->hard_mtu = ctx->tx_max; 436 437 /* max qlen depend on hard_mtu and rx_urb_size */ 438 usbnet_update_max_qlen(dev); 439 440 /* never pad more than 3 full USB packets per transfer */ 441 ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), 442 CDC_NCM_MIN_TX_PKT, ctx->tx_max); 443 } 444 445 /* helpers for NCM and MBIM differences */ 446 static u8 cdc_ncm_flags(struct usbnet *dev) 447 { 448 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 449 450 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 451 return ctx->mbim_desc->bmNetworkCapabilities; 452 if (ctx->func_desc) 453 return ctx->func_desc->bmNetworkCapabilities; 454 return 0; 455 } 456 457 static int cdc_ncm_eth_hlen(struct usbnet *dev) 458 { 459 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 460 return 0; 461 return ETH_HLEN; 462 } 463 464 static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) 465 { 466 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 467 return CDC_MBIM_MIN_DATAGRAM_SIZE; 468 return CDC_NCM_MIN_DATAGRAM_SIZE; 469 } 470 471 static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) 472 { 473 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 474 475 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 476 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 477 if (ctx->ether_desc) 478 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 479 return CDC_NCM_MAX_DATAGRAM_SIZE; 480 } 481 482 /* initial one-time device setup. MUST be called with the data interface 483 * in altsetting 0 484 */ 485 static int cdc_ncm_init(struct usbnet *dev) 486 { 487 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 488 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 489 int err; 490 491 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 492 USB_TYPE_CLASS | USB_DIR_IN 493 |USB_RECIP_INTERFACE, 494 0, iface_no, &ctx->ncm_parm, 495 sizeof(ctx->ncm_parm)); 496 if (err < 0) { 497 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 498 return err; /* GET_NTB_PARAMETERS is required */ 499 } 500 501 /* set CRC Mode */ 502 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { 503 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); 504 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 505 USB_TYPE_CLASS | USB_DIR_OUT 506 | USB_RECIP_INTERFACE, 507 USB_CDC_NCM_CRC_NOT_APPENDED, 508 iface_no, NULL, 0); 509 if (err < 0) 510 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); 511 } 512 513 /* set NTB format, if both formats are supported. 514 * 515 * "The host shall only send this command while the NCM Data 516 * Interface is in alternate setting 0." 517 */ 518 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & 519 USB_CDC_NCM_NTB32_SUPPORTED) { 520 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); 521 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 522 USB_TYPE_CLASS | USB_DIR_OUT 523 | USB_RECIP_INTERFACE, 524 USB_CDC_NCM_NTB16_FORMAT, 525 iface_no, NULL, 0); 526 if (err < 0) 527 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); 528 } 529 530 /* set initial device values */ 531 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 532 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 533 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 534 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 535 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 536 /* devices prior to NCM Errata shall set this field to zero */ 537 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 538 539 dev_dbg(&dev->intf->dev, 540 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 541 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 542 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); 543 544 /* max count of tx datagrams */ 545 if ((ctx->tx_max_datagrams == 0) || 546 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 547 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 548 549 /* set up maximum NDP size */ 550 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); 551 552 /* initial coalescing timer interval */ 553 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; 554 555 return 0; 556 } 557 558 /* set a new max datagram size */ 559 static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) 560 { 561 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 562 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 563 __le16 max_datagram_size; 564 u16 mbim_mtu; 565 int err; 566 567 /* set default based on descriptors */ 568 ctx->max_datagram_size = clamp_t(u32, new_size, 569 cdc_ncm_min_dgram_size(dev), 570 CDC_NCM_MAX_DATAGRAM_SIZE); 571 572 /* inform the device about the selected Max Datagram Size? */ 573 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 574 goto out; 575 576 /* read current mtu value from device */ 577 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 578 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 579 0, iface_no, &max_datagram_size, 2); 580 if (err < 0) { 581 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 582 goto out; 583 } 584 585 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 586 goto out; 587 588 max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 589 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 590 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 591 0, iface_no, &max_datagram_size, 2); 592 if (err < 0) 593 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 594 595 out: 596 /* set MTU to max supported by the device if necessary */ 597 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); 598 599 /* do not exceed operater preferred MTU */ 600 if (ctx->mbim_extended_desc) { 601 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 602 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 603 dev->net->mtu = mbim_mtu; 604 } 605 } 606 607 static void cdc_ncm_fix_modulus(struct usbnet *dev) 608 { 609 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 610 u32 val; 611 612 /* 613 * verify that the structure alignment is: 614 * - power of two 615 * - not greater than the maximum transmit length 616 * - not less than four bytes 617 */ 618 val = ctx->tx_ndp_modulus; 619 620 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 621 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 622 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 623 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 624 } 625 626 /* 627 * verify that the payload alignment is: 628 * - power of two 629 * - not greater than the maximum transmit length 630 * - not less than four bytes 631 */ 632 val = ctx->tx_modulus; 633 634 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 635 (val != ((-val) & val)) || (val >= ctx->tx_max)) { 636 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 637 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 638 } 639 640 /* verify the payload remainder */ 641 if (ctx->tx_remainder >= ctx->tx_modulus) { 642 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 643 ctx->tx_remainder = 0; 644 } 645 646 /* adjust TX-remainder according to NCM specification. */ 647 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & 648 (ctx->tx_modulus - 1)); 649 } 650 651 static int cdc_ncm_setup(struct usbnet *dev) 652 { 653 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 654 u32 def_rx, def_tx; 655 656 /* be conservative when selecting intial buffer size to 657 * increase the number of hosts this will work for 658 */ 659 def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, 660 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 661 def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, 662 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 663 664 /* clamp rx_max and tx_max and inform device */ 665 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); 666 667 /* sanitize the modulus and remainder values */ 668 cdc_ncm_fix_modulus(dev); 669 670 /* set max datagram size */ 671 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); 672 return 0; 673 } 674 675 static void 676 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 677 { 678 struct usb_host_endpoint *e, *in = NULL, *out = NULL; 679 u8 ep; 680 681 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 682 683 e = intf->cur_altsetting->endpoint + ep; 684 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 685 case USB_ENDPOINT_XFER_INT: 686 if (usb_endpoint_dir_in(&e->desc)) { 687 if (!dev->status) 688 dev->status = e; 689 } 690 break; 691 692 case USB_ENDPOINT_XFER_BULK: 693 if (usb_endpoint_dir_in(&e->desc)) { 694 if (!in) 695 in = e; 696 } else { 697 if (!out) 698 out = e; 699 } 700 break; 701 702 default: 703 break; 704 } 705 } 706 if (in && !dev->in) 707 dev->in = usb_rcvbulkpipe(dev->udev, 708 in->desc.bEndpointAddress & 709 USB_ENDPOINT_NUMBER_MASK); 710 if (out && !dev->out) 711 dev->out = usb_sndbulkpipe(dev->udev, 712 out->desc.bEndpointAddress & 713 USB_ENDPOINT_NUMBER_MASK); 714 } 715 716 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 717 { 718 if (ctx == NULL) 719 return; 720 721 if (ctx->tx_rem_skb != NULL) { 722 dev_kfree_skb_any(ctx->tx_rem_skb); 723 ctx->tx_rem_skb = NULL; 724 } 725 726 if (ctx->tx_curr_skb != NULL) { 727 dev_kfree_skb_any(ctx->tx_curr_skb); 728 ctx->tx_curr_skb = NULL; 729 } 730 731 kfree(ctx->delayed_ndp16); 732 733 kfree(ctx); 734 } 735 736 /* we need to override the usbnet change_mtu ndo for two reasons: 737 * - respect the negotiated maximum datagram size 738 * - avoid unwanted changes to rx and tx buffers 739 */ 740 int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) 741 { 742 struct usbnet *dev = netdev_priv(net); 743 int maxmtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); 744 745 if (new_mtu <= 0 || new_mtu > maxmtu) 746 return -EINVAL; 747 748 net->mtu = new_mtu; 749 cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); 750 751 return 0; 752 } 753 EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); 754 755 static const struct net_device_ops cdc_ncm_netdev_ops = { 756 .ndo_open = usbnet_open, 757 .ndo_stop = usbnet_stop, 758 .ndo_start_xmit = usbnet_start_xmit, 759 .ndo_tx_timeout = usbnet_tx_timeout, 760 .ndo_change_mtu = cdc_ncm_change_mtu, 761 .ndo_set_mac_address = eth_mac_addr, 762 .ndo_validate_addr = eth_validate_addr, 763 }; 764 765 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) 766 { 767 struct cdc_ncm_ctx *ctx; 768 struct usb_driver *driver; 769 u8 *buf; 770 int len; 771 int temp; 772 u8 iface_no; 773 struct usb_cdc_parsed_header hdr; 774 775 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 776 if (!ctx) 777 return -ENOMEM; 778 779 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 780 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 781 ctx->bh.data = (unsigned long)dev; 782 ctx->bh.func = cdc_ncm_txpath_bh; 783 atomic_set(&ctx->stop, 0); 784 spin_lock_init(&ctx->mtx); 785 786 /* store ctx pointer in device data field */ 787 dev->data[0] = (unsigned long)ctx; 788 789 /* only the control interface can be successfully probed */ 790 ctx->control = intf; 791 792 /* get some pointers */ 793 driver = driver_of(intf); 794 buf = intf->cur_altsetting->extra; 795 len = intf->cur_altsetting->extralen; 796 797 /* parse through descriptors associated with control interface */ 798 cdc_parse_cdc_header(&hdr, intf, buf, len); 799 800 if (hdr.usb_cdc_union_desc) 801 ctx->data = usb_ifnum_to_if(dev->udev, 802 hdr.usb_cdc_union_desc->bSlaveInterface0); 803 ctx->ether_desc = hdr.usb_cdc_ether_desc; 804 ctx->func_desc = hdr.usb_cdc_ncm_desc; 805 ctx->mbim_desc = hdr.usb_cdc_mbim_desc; 806 ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; 807 808 /* some buggy devices have an IAD but no CDC Union */ 809 if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 810 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 811 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 812 } 813 814 /* check if we got everything */ 815 if (!ctx->data) { 816 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); 817 goto error; 818 } 819 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { 820 if (!ctx->mbim_desc) { 821 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); 822 goto error; 823 } 824 } else { 825 if (!ctx->ether_desc || !ctx->func_desc) { 826 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); 827 goto error; 828 } 829 } 830 831 /* claim data interface, if different from control */ 832 if (ctx->data != ctx->control) { 833 temp = usb_driver_claim_interface(driver, ctx->data, dev); 834 if (temp) { 835 dev_dbg(&intf->dev, "failed to claim data intf\n"); 836 goto error; 837 } 838 } 839 840 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 841 842 /* Reset data interface. Some devices will not reset properly 843 * unless they are configured first. Toggle the altsetting to 844 * force a reset 845 */ 846 usb_set_interface(dev->udev, iface_no, data_altsetting); 847 temp = usb_set_interface(dev->udev, iface_no, 0); 848 if (temp) { 849 dev_dbg(&intf->dev, "set interface failed\n"); 850 goto error2; 851 } 852 853 /* initialize basic device settings */ 854 if (cdc_ncm_init(dev)) 855 goto error2; 856 857 /* Some firmwares need a pause here or they will silently fail 858 * to set up the interface properly. This value was decided 859 * empirically on a Sierra Wireless MC7455 running 02.08.02.00 860 * firmware. 861 */ 862 usleep_range(10000, 20000); 863 864 /* configure data interface */ 865 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 866 if (temp) { 867 dev_dbg(&intf->dev, "set interface failed\n"); 868 goto error2; 869 } 870 871 cdc_ncm_find_endpoints(dev, ctx->data); 872 cdc_ncm_find_endpoints(dev, ctx->control); 873 if (!dev->in || !dev->out || !dev->status) { 874 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 875 goto error2; 876 } 877 878 usb_set_intfdata(ctx->data, dev); 879 usb_set_intfdata(ctx->control, dev); 880 881 if (ctx->ether_desc) { 882 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 883 if (temp) { 884 dev_dbg(&intf->dev, "failed to get mac address\n"); 885 goto error2; 886 } 887 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 888 } 889 890 /* finish setting up the device specific data */ 891 cdc_ncm_setup(dev); 892 893 /* Device-specific flags */ 894 ctx->drvflags = drvflags; 895 896 /* Allocate the delayed NDP if needed. */ 897 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 898 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 899 if (!ctx->delayed_ndp16) 900 goto error2; 901 dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 902 } 903 904 /* override ethtool_ops */ 905 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 906 907 /* add our sysfs attrs */ 908 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 909 910 /* must handle MTU changes */ 911 dev->net->netdev_ops = &cdc_ncm_netdev_ops; 912 913 return 0; 914 915 error2: 916 usb_set_intfdata(ctx->control, NULL); 917 usb_set_intfdata(ctx->data, NULL); 918 if (ctx->data != ctx->control) 919 usb_driver_release_interface(driver, ctx->data); 920 error: 921 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 922 dev->data[0] = 0; 923 dev_info(&intf->dev, "bind() failure\n"); 924 return -ENODEV; 925 } 926 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 927 928 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 929 { 930 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 931 struct usb_driver *driver = driver_of(intf); 932 933 if (ctx == NULL) 934 return; /* no setup */ 935 936 atomic_set(&ctx->stop, 1); 937 938 if (hrtimer_active(&ctx->tx_timer)) 939 hrtimer_cancel(&ctx->tx_timer); 940 941 tasklet_kill(&ctx->bh); 942 943 /* handle devices with combined control and data interface */ 944 if (ctx->control == ctx->data) 945 ctx->data = NULL; 946 947 /* disconnect master --> disconnect slave */ 948 if (intf == ctx->control && ctx->data) { 949 usb_set_intfdata(ctx->data, NULL); 950 usb_driver_release_interface(driver, ctx->data); 951 ctx->data = NULL; 952 953 } else if (intf == ctx->data && ctx->control) { 954 usb_set_intfdata(ctx->control, NULL); 955 usb_driver_release_interface(driver, ctx->control); 956 ctx->control = NULL; 957 } 958 959 usb_set_intfdata(intf, NULL); 960 cdc_ncm_free(ctx); 961 } 962 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 963 964 /* Return the number of the MBIM control interface altsetting iff it 965 * is preferred and available, 966 */ 967 u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 968 { 969 struct usb_host_interface *alt; 970 971 /* The MBIM spec defines a NCM compatible default altsetting, 972 * which we may have matched: 973 * 974 * "Functions that implement both NCM 1.0 and MBIM (an 975 * “NCM/MBIM function”) according to this recommendation 976 * shall provide two alternate settings for the 977 * Communication Interface. Alternate setting 0, and the 978 * associated class and endpoint descriptors, shall be 979 * constructed according to the rules given for the 980 * Communication Interface in section 5 of [USBNCM10]. 981 * Alternate setting 1, and the associated class and 982 * endpoint descriptors, shall be constructed according to 983 * the rules given in section 6 (USB Device Model) of this 984 * specification." 985 */ 986 if (intf->num_altsetting < 2) 987 return intf->cur_altsetting->desc.bAlternateSetting; 988 989 if (prefer_mbim) { 990 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 991 if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 992 return CDC_NCM_COMM_ALTSETTING_MBIM; 993 } 994 return CDC_NCM_COMM_ALTSETTING_NCM; 995 } 996 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 997 998 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 999 { 1000 /* MBIM backwards compatible function? */ 1001 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 1002 return -ENODEV; 1003 1004 /* The NCM data altsetting is fixed, so we hard-coded it. 1005 * Additionally, generic NCM devices are assumed to accept arbitrarily 1006 * placed NDP. 1007 */ 1008 return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 1009 } 1010 1011 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 1012 { 1013 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 1014 1015 if (skb->len + align > max) 1016 align = max - skb->len; 1017 if (align && skb_tailroom(skb) >= align) 1018 memset(skb_put(skb, align), 0, align); 1019 } 1020 1021 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 1022 * allocating a new one within skb 1023 */ 1024 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 1025 { 1026 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 1027 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 1028 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 1029 1030 /* If NDP should be moved to the end of the NCM package, we can't follow the 1031 * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 1032 * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 1033 */ 1034 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 1035 if (ctx->delayed_ndp16->dwSignature == sign) 1036 return ctx->delayed_ndp16; 1037 1038 /* We can only push a single NDP to the end. Return 1039 * NULL to send what we've already got and queue this 1040 * skb for later. 1041 */ 1042 else if (ctx->delayed_ndp16->dwSignature) 1043 return NULL; 1044 } 1045 1046 /* follow the chain of NDPs, looking for a match */ 1047 while (ndpoffset) { 1048 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 1049 if (ndp16->dwSignature == sign) 1050 return ndp16; 1051 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1052 } 1053 1054 /* align new NDP */ 1055 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1056 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1057 1058 /* verify that there is room for the NDP and the datagram (reserve) */ 1059 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) 1060 return NULL; 1061 1062 /* link to it */ 1063 if (ndp16) 1064 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 1065 else 1066 nth16->wNdpIndex = cpu_to_le16(skb->len); 1067 1068 /* push a new empty NDP */ 1069 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1070 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); 1071 else 1072 ndp16 = ctx->delayed_ndp16; 1073 1074 ndp16->dwSignature = sign; 1075 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 1076 return ndp16; 1077 } 1078 1079 struct sk_buff * 1080 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 1081 { 1082 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1083 struct usb_cdc_ncm_nth16 *nth16; 1084 struct usb_cdc_ncm_ndp16 *ndp16; 1085 struct sk_buff *skb_out; 1086 u16 n = 0, index, ndplen; 1087 u8 ready2send = 0; 1088 u32 delayed_ndp_size; 1089 1090 /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 1091 * accordingly. Otherwise, we should check here. 1092 */ 1093 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 1094 delayed_ndp_size = ctx->max_ndp_size; 1095 else 1096 delayed_ndp_size = 0; 1097 1098 /* if there is a remaining skb, it gets priority */ 1099 if (skb != NULL) { 1100 swap(skb, ctx->tx_rem_skb); 1101 swap(sign, ctx->tx_rem_sign); 1102 } else { 1103 ready2send = 1; 1104 } 1105 1106 /* check if we are resuming an OUT skb */ 1107 skb_out = ctx->tx_curr_skb; 1108 1109 /* allocate a new OUT skb */ 1110 if (!skb_out) { 1111 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 1112 if (skb_out == NULL) { 1113 if (skb != NULL) { 1114 dev_kfree_skb_any(skb); 1115 dev->net->stats.tx_dropped++; 1116 } 1117 goto exit_no_skb; 1118 } 1119 /* fill out the initial 16-bit NTB header */ 1120 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 1121 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 1122 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 1123 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 1124 1125 /* count total number of frames in this NTB */ 1126 ctx->tx_curr_frame_num = 0; 1127 1128 /* recent payload counter for this skb_out */ 1129 ctx->tx_curr_frame_payload = 0; 1130 } 1131 1132 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1133 /* send any remaining skb first */ 1134 if (skb == NULL) { 1135 skb = ctx->tx_rem_skb; 1136 sign = ctx->tx_rem_sign; 1137 ctx->tx_rem_skb = NULL; 1138 1139 /* check for end of skb */ 1140 if (skb == NULL) 1141 break; 1142 } 1143 1144 /* get the appropriate NDP for this skb */ 1145 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1146 1147 /* align beginning of next frame */ 1148 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 1149 1150 /* check if we had enough room left for both NDP and frame */ 1151 if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { 1152 if (n == 0) { 1153 /* won't fit, MTU problem? */ 1154 dev_kfree_skb_any(skb); 1155 skb = NULL; 1156 dev->net->stats.tx_dropped++; 1157 } else { 1158 /* no room for skb - store for later */ 1159 if (ctx->tx_rem_skb != NULL) { 1160 dev_kfree_skb_any(ctx->tx_rem_skb); 1161 dev->net->stats.tx_dropped++; 1162 } 1163 ctx->tx_rem_skb = skb; 1164 ctx->tx_rem_sign = sign; 1165 skb = NULL; 1166 ready2send = 1; 1167 ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1168 } 1169 break; 1170 } 1171 1172 /* calculate frame number withing this NDP */ 1173 ndplen = le16_to_cpu(ndp16->wLength); 1174 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1175 1176 /* OK, add this skb */ 1177 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 1178 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 1179 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 1180 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 1181 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1182 dev_kfree_skb_any(skb); 1183 skb = NULL; 1184 1185 /* send now if this NDP is full */ 1186 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1187 ready2send = 1; 1188 ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1189 break; 1190 } 1191 } 1192 1193 /* free up any dangling skb */ 1194 if (skb != NULL) { 1195 dev_kfree_skb_any(skb); 1196 skb = NULL; 1197 dev->net->stats.tx_dropped++; 1198 } 1199 1200 ctx->tx_curr_frame_num = n; 1201 1202 if (n == 0) { 1203 /* wait for more frames */ 1204 /* push variables */ 1205 ctx->tx_curr_skb = skb_out; 1206 goto exit_no_skb; 1207 1208 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1209 /* wait for more frames */ 1210 /* push variables */ 1211 ctx->tx_curr_skb = skb_out; 1212 /* set the pending count */ 1213 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1214 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1215 goto exit_no_skb; 1216 1217 } else { 1218 if (n == ctx->tx_max_datagrams) 1219 ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1220 /* frame goes out */ 1221 /* variables will be reset at next call */ 1222 } 1223 1224 /* If requested, put NDP at end of frame. */ 1225 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 1226 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1227 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1228 nth16->wNdpIndex = cpu_to_le16(skb_out->len); 1229 memcpy(skb_put(skb_out, ctx->max_ndp_size), ctx->delayed_ndp16, ctx->max_ndp_size); 1230 1231 /* Zero out delayed NDP - signature checking will naturally fail. */ 1232 ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 1233 } 1234 1235 /* If collected data size is less or equal ctx->min_tx_pkt 1236 * bytes, we send buffers as it is. If we get more data, it 1237 * would be more efficient for USB HS mobile device with DMA 1238 * engine to receive a full size NTB, than canceling DMA 1239 * transfer and receiving a short packet. 1240 * 1241 * This optimization support is pointless if we end up sending 1242 * a ZLP after full sized NTBs. 1243 */ 1244 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 1245 skb_out->len > ctx->min_tx_pkt) 1246 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 1247 ctx->tx_max - skb_out->len); 1248 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) 1249 *skb_put(skb_out, 1) = 0; /* force short packet */ 1250 1251 /* set final frame length */ 1252 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1253 nth16->wBlockLength = cpu_to_le16(skb_out->len); 1254 1255 /* return skb */ 1256 ctx->tx_curr_skb = NULL; 1257 1258 /* keep private stats: framing overhead and number of NTBs */ 1259 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1260 ctx->tx_ntbs++; 1261 1262 /* usbnet will count all the framing overhead by default. 1263 * Adjust the stats so that the tx_bytes counter show real 1264 * payload data instead. 1265 */ 1266 usbnet_set_skb_tx_stats(skb_out, n, 1267 (long)ctx->tx_curr_frame_payload - skb_out->len); 1268 1269 return skb_out; 1270 1271 exit_no_skb: 1272 /* Start timer, if there is a remaining non-empty skb */ 1273 if (ctx->tx_curr_skb != NULL && n > 0) 1274 cdc_ncm_tx_timeout_start(ctx); 1275 return NULL; 1276 } 1277 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1278 1279 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1280 { 1281 /* start timer, if not already started */ 1282 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1283 hrtimer_start(&ctx->tx_timer, 1284 ktime_set(0, ctx->timer_interval), 1285 HRTIMER_MODE_REL); 1286 } 1287 1288 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1289 { 1290 struct cdc_ncm_ctx *ctx = 1291 container_of(timer, struct cdc_ncm_ctx, tx_timer); 1292 1293 if (!atomic_read(&ctx->stop)) 1294 tasklet_schedule(&ctx->bh); 1295 return HRTIMER_NORESTART; 1296 } 1297 1298 static void cdc_ncm_txpath_bh(unsigned long param) 1299 { 1300 struct usbnet *dev = (struct usbnet *)param; 1301 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1302 1303 spin_lock_bh(&ctx->mtx); 1304 if (ctx->tx_timer_pending != 0) { 1305 ctx->tx_timer_pending--; 1306 cdc_ncm_tx_timeout_start(ctx); 1307 spin_unlock_bh(&ctx->mtx); 1308 } else if (dev->net != NULL) { 1309 ctx->tx_reason_timeout++; /* count reason for transmitting */ 1310 spin_unlock_bh(&ctx->mtx); 1311 netif_tx_lock_bh(dev->net); 1312 usbnet_start_xmit(NULL, dev->net); 1313 netif_tx_unlock_bh(dev->net); 1314 } else { 1315 spin_unlock_bh(&ctx->mtx); 1316 } 1317 } 1318 1319 struct sk_buff * 1320 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1321 { 1322 struct sk_buff *skb_out; 1323 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1324 1325 /* 1326 * The Ethernet API we are using does not support transmitting 1327 * multiple Ethernet frames in a single call. This driver will 1328 * accumulate multiple Ethernet frames and send out a larger 1329 * USB frame when the USB buffer is full or when a single jiffies 1330 * timeout happens. 1331 */ 1332 if (ctx == NULL) 1333 goto error; 1334 1335 spin_lock_bh(&ctx->mtx); 1336 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 1337 spin_unlock_bh(&ctx->mtx); 1338 return skb_out; 1339 1340 error: 1341 if (skb != NULL) 1342 dev_kfree_skb_any(skb); 1343 1344 return NULL; 1345 } 1346 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1347 1348 /* verify NTB header and return offset of first NDP, or negative error */ 1349 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1350 { 1351 struct usbnet *dev = netdev_priv(skb_in->dev); 1352 struct usb_cdc_ncm_nth16 *nth16; 1353 int len; 1354 int ret = -EINVAL; 1355 1356 if (ctx == NULL) 1357 goto error; 1358 1359 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1360 sizeof(struct usb_cdc_ncm_ndp16))) { 1361 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1362 goto error; 1363 } 1364 1365 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1366 1367 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 1368 netif_dbg(dev, rx_err, dev->net, 1369 "invalid NTH16 signature <%#010x>\n", 1370 le32_to_cpu(nth16->dwSignature)); 1371 goto error; 1372 } 1373 1374 len = le16_to_cpu(nth16->wBlockLength); 1375 if (len > ctx->rx_max) { 1376 netif_dbg(dev, rx_err, dev->net, 1377 "unsupported NTB block length %u/%u\n", len, 1378 ctx->rx_max); 1379 goto error; 1380 } 1381 1382 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1383 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1384 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1385 netif_dbg(dev, rx_err, dev->net, 1386 "sequence number glitch prev=%d curr=%d\n", 1387 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1388 } 1389 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1390 1391 ret = le16_to_cpu(nth16->wNdpIndex); 1392 error: 1393 return ret; 1394 } 1395 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1396 1397 /* verify NDP header and return number of datagrams, or negative error */ 1398 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1399 { 1400 struct usbnet *dev = netdev_priv(skb_in->dev); 1401 struct usb_cdc_ncm_ndp16 *ndp16; 1402 int ret = -EINVAL; 1403 1404 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1405 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1406 ndpoffset); 1407 goto error; 1408 } 1409 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1410 1411 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1412 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1413 le16_to_cpu(ndp16->wLength)); 1414 goto error; 1415 } 1416 1417 ret = ((le16_to_cpu(ndp16->wLength) - 1418 sizeof(struct usb_cdc_ncm_ndp16)) / 1419 sizeof(struct usb_cdc_ncm_dpe16)); 1420 ret--; /* we process NDP entries except for the last one */ 1421 1422 if ((sizeof(struct usb_cdc_ncm_ndp16) + 1423 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1424 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1425 ret = -EINVAL; 1426 } 1427 1428 error: 1429 return ret; 1430 } 1431 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1432 1433 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1434 { 1435 struct sk_buff *skb; 1436 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1437 int len; 1438 int nframes; 1439 int x; 1440 int offset; 1441 struct usb_cdc_ncm_ndp16 *ndp16; 1442 struct usb_cdc_ncm_dpe16 *dpe16; 1443 int ndpoffset; 1444 int loopcount = 50; /* arbitrary max preventing infinite loop */ 1445 u32 payload = 0; 1446 1447 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 1448 if (ndpoffset < 0) 1449 goto error; 1450 1451 next_ndp: 1452 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1453 if (nframes < 0) 1454 goto error; 1455 1456 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1457 1458 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 1459 netif_dbg(dev, rx_err, dev->net, 1460 "invalid DPT16 signature <%#010x>\n", 1461 le32_to_cpu(ndp16->dwSignature)); 1462 goto err_ndp; 1463 } 1464 dpe16 = ndp16->dpe16; 1465 1466 for (x = 0; x < nframes; x++, dpe16++) { 1467 offset = le16_to_cpu(dpe16->wDatagramIndex); 1468 len = le16_to_cpu(dpe16->wDatagramLength); 1469 1470 /* 1471 * CDC NCM ch. 3.7 1472 * All entries after first NULL entry are to be ignored 1473 */ 1474 if ((offset == 0) || (len == 0)) { 1475 if (!x) 1476 goto err_ndp; /* empty NTB */ 1477 break; 1478 } 1479 1480 /* sanity checking */ 1481 if (((offset + len) > skb_in->len) || 1482 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1483 netif_dbg(dev, rx_err, dev->net, 1484 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1485 x, offset, len, skb_in); 1486 if (!x) 1487 goto err_ndp; 1488 break; 1489 1490 } else { 1491 /* create a fresh copy to reduce truesize */ 1492 skb = netdev_alloc_skb_ip_align(dev->net, len); 1493 if (!skb) 1494 goto error; 1495 memcpy(skb_put(skb, len), skb_in->data + offset, len); 1496 usbnet_skb_return(dev, skb); 1497 payload += len; /* count payload bytes in this NTB */ 1498 } 1499 } 1500 err_ndp: 1501 /* are there more NDPs to process? */ 1502 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1503 if (ndpoffset && loopcount--) 1504 goto next_ndp; 1505 1506 /* update stats */ 1507 ctx->rx_overhead += skb_in->len - payload; 1508 ctx->rx_ntbs++; 1509 1510 return 1; 1511 error: 1512 return 0; 1513 } 1514 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1515 1516 static void 1517 cdc_ncm_speed_change(struct usbnet *dev, 1518 struct usb_cdc_speed_change *data) 1519 { 1520 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1521 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1522 1523 /* 1524 * Currently the USB-NET API does not support reporting the actual 1525 * device speed. Do print it instead. 1526 */ 1527 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1528 netif_info(dev, link, dev->net, 1529 "%u mbit/s downlink %u mbit/s uplink\n", 1530 (unsigned int)(rx_speed / 1000000U), 1531 (unsigned int)(tx_speed / 1000000U)); 1532 } else { 1533 netif_info(dev, link, dev->net, 1534 "%u kbit/s downlink %u kbit/s uplink\n", 1535 (unsigned int)(rx_speed / 1000U), 1536 (unsigned int)(tx_speed / 1000U)); 1537 } 1538 } 1539 1540 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1541 { 1542 struct cdc_ncm_ctx *ctx; 1543 struct usb_cdc_notification *event; 1544 1545 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1546 1547 if (urb->actual_length < sizeof(*event)) 1548 return; 1549 1550 /* test for split data in 8-byte chunks */ 1551 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1552 cdc_ncm_speed_change(dev, 1553 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1554 return; 1555 } 1556 1557 event = urb->transfer_buffer; 1558 1559 switch (event->bNotificationType) { 1560 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1561 /* 1562 * According to the CDC NCM specification ch.7.1 1563 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1564 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1565 */ 1566 netif_info(dev, link, dev->net, 1567 "network connection: %sconnected\n", 1568 !!event->wValue ? "" : "dis"); 1569 usbnet_link_change(dev, !!event->wValue, 0); 1570 break; 1571 1572 case USB_CDC_NOTIFY_SPEED_CHANGE: 1573 if (urb->actual_length < (sizeof(*event) + 1574 sizeof(struct usb_cdc_speed_change))) 1575 set_bit(EVENT_STS_SPLIT, &dev->flags); 1576 else 1577 cdc_ncm_speed_change(dev, 1578 (struct usb_cdc_speed_change *)&event[1]); 1579 break; 1580 1581 default: 1582 dev_dbg(&dev->udev->dev, 1583 "NCM: unexpected notification 0x%02x!\n", 1584 event->bNotificationType); 1585 break; 1586 } 1587 } 1588 1589 static const struct driver_info cdc_ncm_info = { 1590 .description = "CDC NCM", 1591 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1592 | FLAG_LINK_INTR, 1593 .bind = cdc_ncm_bind, 1594 .unbind = cdc_ncm_unbind, 1595 .manage_power = usbnet_manage_power, 1596 .status = cdc_ncm_status, 1597 .rx_fixup = cdc_ncm_rx_fixup, 1598 .tx_fixup = cdc_ncm_tx_fixup, 1599 }; 1600 1601 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1602 static const struct driver_info wwan_info = { 1603 .description = "Mobile Broadband Network Device", 1604 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1605 | FLAG_LINK_INTR | FLAG_WWAN, 1606 .bind = cdc_ncm_bind, 1607 .unbind = cdc_ncm_unbind, 1608 .manage_power = usbnet_manage_power, 1609 .status = cdc_ncm_status, 1610 .rx_fixup = cdc_ncm_rx_fixup, 1611 .tx_fixup = cdc_ncm_tx_fixup, 1612 }; 1613 1614 /* Same as wwan_info, but with FLAG_NOARP */ 1615 static const struct driver_info wwan_noarp_info = { 1616 .description = "Mobile Broadband Network Device (NO ARP)", 1617 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1618 | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, 1619 .bind = cdc_ncm_bind, 1620 .unbind = cdc_ncm_unbind, 1621 .manage_power = usbnet_manage_power, 1622 .status = cdc_ncm_status, 1623 .rx_fixup = cdc_ncm_rx_fixup, 1624 .tx_fixup = cdc_ncm_tx_fixup, 1625 }; 1626 1627 static const struct usb_device_id cdc_devs[] = { 1628 /* Ericsson MBM devices like F5521gw */ 1629 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1630 | USB_DEVICE_ID_MATCH_VENDOR, 1631 .idVendor = 0x0bdb, 1632 .bInterfaceClass = USB_CLASS_COMM, 1633 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1634 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1635 .driver_info = (unsigned long) &wwan_info, 1636 }, 1637 1638 /* Telit LE910 V2 */ 1639 { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, 1640 USB_CLASS_COMM, 1641 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1642 .driver_info = (unsigned long)&wwan_noarp_info, 1643 }, 1644 1645 /* DW5812 LTE Verizon Mobile Broadband Card 1646 * Unlike DW5550 this device requires FLAG_NOARP 1647 */ 1648 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, 1649 USB_CLASS_COMM, 1650 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1651 .driver_info = (unsigned long)&wwan_noarp_info, 1652 }, 1653 1654 /* DW5813 LTE AT&T Mobile Broadband Card 1655 * Unlike DW5550 this device requires FLAG_NOARP 1656 */ 1657 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, 1658 USB_CLASS_COMM, 1659 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1660 .driver_info = (unsigned long)&wwan_noarp_info, 1661 }, 1662 1663 /* Dell branded MBM devices like DW5550 */ 1664 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1665 | USB_DEVICE_ID_MATCH_VENDOR, 1666 .idVendor = 0x413c, 1667 .bInterfaceClass = USB_CLASS_COMM, 1668 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1669 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1670 .driver_info = (unsigned long) &wwan_info, 1671 }, 1672 1673 /* Toshiba branded MBM devices */ 1674 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1675 | USB_DEVICE_ID_MATCH_VENDOR, 1676 .idVendor = 0x0930, 1677 .bInterfaceClass = USB_CLASS_COMM, 1678 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1679 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1680 .driver_info = (unsigned long) &wwan_info, 1681 }, 1682 1683 /* tag Huawei devices as wwan */ 1684 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1685 USB_CLASS_COMM, 1686 USB_CDC_SUBCLASS_NCM, 1687 USB_CDC_PROTO_NONE), 1688 .driver_info = (unsigned long)&wwan_info, 1689 }, 1690 1691 /* Infineon(now Intel) HSPA Modem platform */ 1692 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1693 USB_CLASS_COMM, 1694 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1695 .driver_info = (unsigned long)&wwan_noarp_info, 1696 }, 1697 1698 /* Generic CDC-NCM devices */ 1699 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1700 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1701 .driver_info = (unsigned long)&cdc_ncm_info, 1702 }, 1703 { 1704 }, 1705 }; 1706 MODULE_DEVICE_TABLE(usb, cdc_devs); 1707 1708 static struct usb_driver cdc_ncm_driver = { 1709 .name = "cdc_ncm", 1710 .id_table = cdc_devs, 1711 .probe = usbnet_probe, 1712 .disconnect = usbnet_disconnect, 1713 .suspend = usbnet_suspend, 1714 .resume = usbnet_resume, 1715 .reset_resume = usbnet_resume, 1716 .supports_autosuspend = 1, 1717 .disable_hub_initiated_lpm = 1, 1718 }; 1719 1720 module_usb_driver(cdc_ncm_driver); 1721 1722 MODULE_AUTHOR("Hans Petter Selasky"); 1723 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1724 MODULE_LICENSE("Dual BSD/GPL"); 1725