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 /* Device-specific flags */ 843 ctx->drvflags = drvflags; 844 845 /* Reset data interface. Some devices will not reset properly 846 * unless they are configured first. Toggle the altsetting to 847 * force a reset. 848 * Some other devices do not work properly with this procedure 849 * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 850 */ 851 if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) 852 usb_set_interface(dev->udev, iface_no, data_altsetting); 853 854 temp = usb_set_interface(dev->udev, iface_no, 0); 855 if (temp) { 856 dev_dbg(&intf->dev, "set interface failed\n"); 857 goto error2; 858 } 859 860 /* initialize basic device settings */ 861 if (cdc_ncm_init(dev)) 862 goto error2; 863 864 /* Some firmwares need a pause here or they will silently fail 865 * to set up the interface properly. This value was decided 866 * empirically on a Sierra Wireless MC7455 running 02.08.02.00 867 * firmware. 868 */ 869 usleep_range(10000, 20000); 870 871 /* configure data interface */ 872 temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 873 if (temp) { 874 dev_dbg(&intf->dev, "set interface failed\n"); 875 goto error2; 876 } 877 878 cdc_ncm_find_endpoints(dev, ctx->data); 879 cdc_ncm_find_endpoints(dev, ctx->control); 880 if (!dev->in || !dev->out || !dev->status) { 881 dev_dbg(&intf->dev, "failed to collect endpoints\n"); 882 goto error2; 883 } 884 885 usb_set_intfdata(ctx->data, dev); 886 usb_set_intfdata(ctx->control, dev); 887 888 if (ctx->ether_desc) { 889 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 890 if (temp) { 891 dev_dbg(&intf->dev, "failed to get mac address\n"); 892 goto error2; 893 } 894 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 895 } 896 897 /* finish setting up the device specific data */ 898 cdc_ncm_setup(dev); 899 900 /* Allocate the delayed NDP if needed. */ 901 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 902 ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 903 if (!ctx->delayed_ndp16) 904 goto error2; 905 dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 906 } 907 908 /* override ethtool_ops */ 909 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 910 911 /* add our sysfs attrs */ 912 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 913 914 /* must handle MTU changes */ 915 dev->net->netdev_ops = &cdc_ncm_netdev_ops; 916 917 return 0; 918 919 error2: 920 usb_set_intfdata(ctx->control, NULL); 921 usb_set_intfdata(ctx->data, NULL); 922 if (ctx->data != ctx->control) 923 usb_driver_release_interface(driver, ctx->data); 924 error: 925 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 926 dev->data[0] = 0; 927 dev_info(&intf->dev, "bind() failure\n"); 928 return -ENODEV; 929 } 930 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 931 932 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 933 { 934 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 935 struct usb_driver *driver = driver_of(intf); 936 937 if (ctx == NULL) 938 return; /* no setup */ 939 940 atomic_set(&ctx->stop, 1); 941 942 if (hrtimer_active(&ctx->tx_timer)) 943 hrtimer_cancel(&ctx->tx_timer); 944 945 tasklet_kill(&ctx->bh); 946 947 /* handle devices with combined control and data interface */ 948 if (ctx->control == ctx->data) 949 ctx->data = NULL; 950 951 /* disconnect master --> disconnect slave */ 952 if (intf == ctx->control && ctx->data) { 953 usb_set_intfdata(ctx->data, NULL); 954 usb_driver_release_interface(driver, ctx->data); 955 ctx->data = NULL; 956 957 } else if (intf == ctx->data && ctx->control) { 958 usb_set_intfdata(ctx->control, NULL); 959 usb_driver_release_interface(driver, ctx->control); 960 ctx->control = NULL; 961 } 962 963 usb_set_intfdata(intf, NULL); 964 cdc_ncm_free(ctx); 965 } 966 EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 967 968 /* Return the number of the MBIM control interface altsetting iff it 969 * is preferred and available, 970 */ 971 u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 972 { 973 struct usb_host_interface *alt; 974 975 /* The MBIM spec defines a NCM compatible default altsetting, 976 * which we may have matched: 977 * 978 * "Functions that implement both NCM 1.0 and MBIM (an 979 * “NCM/MBIM function”) according to this recommendation 980 * shall provide two alternate settings for the 981 * Communication Interface. Alternate setting 0, and the 982 * associated class and endpoint descriptors, shall be 983 * constructed according to the rules given for the 984 * Communication Interface in section 5 of [USBNCM10]. 985 * Alternate setting 1, and the associated class and 986 * endpoint descriptors, shall be constructed according to 987 * the rules given in section 6 (USB Device Model) of this 988 * specification." 989 */ 990 if (intf->num_altsetting < 2) 991 return intf->cur_altsetting->desc.bAlternateSetting; 992 993 if (prefer_mbim) { 994 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 995 if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 996 return CDC_NCM_COMM_ALTSETTING_MBIM; 997 } 998 return CDC_NCM_COMM_ALTSETTING_NCM; 999 } 1000 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 1001 1002 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 1003 { 1004 /* MBIM backwards compatible function? */ 1005 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 1006 return -ENODEV; 1007 1008 /* The NCM data altsetting is fixed, so we hard-coded it. 1009 * Additionally, generic NCM devices are assumed to accept arbitrarily 1010 * placed NDP. 1011 */ 1012 return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 1013 } 1014 1015 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 1016 { 1017 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 1018 1019 if (skb->len + align > max) 1020 align = max - skb->len; 1021 if (align && skb_tailroom(skb) >= align) 1022 memset(skb_put(skb, align), 0, align); 1023 } 1024 1025 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 1026 * allocating a new one within skb 1027 */ 1028 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 1029 { 1030 struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 1031 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 1032 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 1033 1034 /* If NDP should be moved to the end of the NCM package, we can't follow the 1035 * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 1036 * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 1037 */ 1038 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 1039 if (ctx->delayed_ndp16->dwSignature == sign) 1040 return ctx->delayed_ndp16; 1041 1042 /* We can only push a single NDP to the end. Return 1043 * NULL to send what we've already got and queue this 1044 * skb for later. 1045 */ 1046 else if (ctx->delayed_ndp16->dwSignature) 1047 return NULL; 1048 } 1049 1050 /* follow the chain of NDPs, looking for a match */ 1051 while (ndpoffset) { 1052 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 1053 if (ndp16->dwSignature == sign) 1054 return ndp16; 1055 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1056 } 1057 1058 /* align new NDP */ 1059 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1060 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1061 1062 /* verify that there is room for the NDP and the datagram (reserve) */ 1063 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) 1064 return NULL; 1065 1066 /* link to it */ 1067 if (ndp16) 1068 ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 1069 else 1070 nth16->wNdpIndex = cpu_to_le16(skb->len); 1071 1072 /* push a new empty NDP */ 1073 if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1074 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); 1075 else 1076 ndp16 = ctx->delayed_ndp16; 1077 1078 ndp16->dwSignature = sign; 1079 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 1080 return ndp16; 1081 } 1082 1083 struct sk_buff * 1084 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 1085 { 1086 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1087 struct usb_cdc_ncm_nth16 *nth16; 1088 struct usb_cdc_ncm_ndp16 *ndp16; 1089 struct sk_buff *skb_out; 1090 u16 n = 0, index, ndplen; 1091 u8 ready2send = 0; 1092 u32 delayed_ndp_size; 1093 1094 /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 1095 * accordingly. Otherwise, we should check here. 1096 */ 1097 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 1098 delayed_ndp_size = ctx->max_ndp_size; 1099 else 1100 delayed_ndp_size = 0; 1101 1102 /* if there is a remaining skb, it gets priority */ 1103 if (skb != NULL) { 1104 swap(skb, ctx->tx_rem_skb); 1105 swap(sign, ctx->tx_rem_sign); 1106 } else { 1107 ready2send = 1; 1108 } 1109 1110 /* check if we are resuming an OUT skb */ 1111 skb_out = ctx->tx_curr_skb; 1112 1113 /* allocate a new OUT skb */ 1114 if (!skb_out) { 1115 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 1116 if (skb_out == NULL) { 1117 if (skb != NULL) { 1118 dev_kfree_skb_any(skb); 1119 dev->net->stats.tx_dropped++; 1120 } 1121 goto exit_no_skb; 1122 } 1123 /* fill out the initial 16-bit NTB header */ 1124 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 1125 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 1126 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 1127 nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 1128 1129 /* count total number of frames in this NTB */ 1130 ctx->tx_curr_frame_num = 0; 1131 1132 /* recent payload counter for this skb_out */ 1133 ctx->tx_curr_frame_payload = 0; 1134 } 1135 1136 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1137 /* send any remaining skb first */ 1138 if (skb == NULL) { 1139 skb = ctx->tx_rem_skb; 1140 sign = ctx->tx_rem_sign; 1141 ctx->tx_rem_skb = NULL; 1142 1143 /* check for end of skb */ 1144 if (skb == NULL) 1145 break; 1146 } 1147 1148 /* get the appropriate NDP for this skb */ 1149 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1150 1151 /* align beginning of next frame */ 1152 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 1153 1154 /* check if we had enough room left for both NDP and frame */ 1155 if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { 1156 if (n == 0) { 1157 /* won't fit, MTU problem? */ 1158 dev_kfree_skb_any(skb); 1159 skb = NULL; 1160 dev->net->stats.tx_dropped++; 1161 } else { 1162 /* no room for skb - store for later */ 1163 if (ctx->tx_rem_skb != NULL) { 1164 dev_kfree_skb_any(ctx->tx_rem_skb); 1165 dev->net->stats.tx_dropped++; 1166 } 1167 ctx->tx_rem_skb = skb; 1168 ctx->tx_rem_sign = sign; 1169 skb = NULL; 1170 ready2send = 1; 1171 ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1172 } 1173 break; 1174 } 1175 1176 /* calculate frame number withing this NDP */ 1177 ndplen = le16_to_cpu(ndp16->wLength); 1178 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1179 1180 /* OK, add this skb */ 1181 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 1182 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 1183 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 1184 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 1185 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1186 dev_kfree_skb_any(skb); 1187 skb = NULL; 1188 1189 /* send now if this NDP is full */ 1190 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1191 ready2send = 1; 1192 ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1193 break; 1194 } 1195 } 1196 1197 /* free up any dangling skb */ 1198 if (skb != NULL) { 1199 dev_kfree_skb_any(skb); 1200 skb = NULL; 1201 dev->net->stats.tx_dropped++; 1202 } 1203 1204 ctx->tx_curr_frame_num = n; 1205 1206 if (n == 0) { 1207 /* wait for more frames */ 1208 /* push variables */ 1209 ctx->tx_curr_skb = skb_out; 1210 goto exit_no_skb; 1211 1212 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1213 /* wait for more frames */ 1214 /* push variables */ 1215 ctx->tx_curr_skb = skb_out; 1216 /* set the pending count */ 1217 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1218 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1219 goto exit_no_skb; 1220 1221 } else { 1222 if (n == ctx->tx_max_datagrams) 1223 ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1224 /* frame goes out */ 1225 /* variables will be reset at next call */ 1226 } 1227 1228 /* If requested, put NDP at end of frame. */ 1229 if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 1230 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1231 cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1232 nth16->wNdpIndex = cpu_to_le16(skb_out->len); 1233 memcpy(skb_put(skb_out, ctx->max_ndp_size), ctx->delayed_ndp16, ctx->max_ndp_size); 1234 1235 /* Zero out delayed NDP - signature checking will naturally fail. */ 1236 ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 1237 } 1238 1239 /* If collected data size is less or equal ctx->min_tx_pkt 1240 * bytes, we send buffers as it is. If we get more data, it 1241 * would be more efficient for USB HS mobile device with DMA 1242 * engine to receive a full size NTB, than canceling DMA 1243 * transfer and receiving a short packet. 1244 * 1245 * This optimization support is pointless if we end up sending 1246 * a ZLP after full sized NTBs. 1247 */ 1248 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 1249 skb_out->len > ctx->min_tx_pkt) 1250 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 1251 ctx->tx_max - skb_out->len); 1252 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) 1253 *skb_put(skb_out, 1) = 0; /* force short packet */ 1254 1255 /* set final frame length */ 1256 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1257 nth16->wBlockLength = cpu_to_le16(skb_out->len); 1258 1259 /* return skb */ 1260 ctx->tx_curr_skb = NULL; 1261 1262 /* keep private stats: framing overhead and number of NTBs */ 1263 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1264 ctx->tx_ntbs++; 1265 1266 /* usbnet will count all the framing overhead by default. 1267 * Adjust the stats so that the tx_bytes counter show real 1268 * payload data instead. 1269 */ 1270 usbnet_set_skb_tx_stats(skb_out, n, 1271 (long)ctx->tx_curr_frame_payload - skb_out->len); 1272 1273 return skb_out; 1274 1275 exit_no_skb: 1276 /* Start timer, if there is a remaining non-empty skb */ 1277 if (ctx->tx_curr_skb != NULL && n > 0) 1278 cdc_ncm_tx_timeout_start(ctx); 1279 return NULL; 1280 } 1281 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1282 1283 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1284 { 1285 /* start timer, if not already started */ 1286 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1287 hrtimer_start(&ctx->tx_timer, 1288 ktime_set(0, ctx->timer_interval), 1289 HRTIMER_MODE_REL); 1290 } 1291 1292 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1293 { 1294 struct cdc_ncm_ctx *ctx = 1295 container_of(timer, struct cdc_ncm_ctx, tx_timer); 1296 1297 if (!atomic_read(&ctx->stop)) 1298 tasklet_schedule(&ctx->bh); 1299 return HRTIMER_NORESTART; 1300 } 1301 1302 static void cdc_ncm_txpath_bh(unsigned long param) 1303 { 1304 struct usbnet *dev = (struct usbnet *)param; 1305 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1306 1307 spin_lock_bh(&ctx->mtx); 1308 if (ctx->tx_timer_pending != 0) { 1309 ctx->tx_timer_pending--; 1310 cdc_ncm_tx_timeout_start(ctx); 1311 spin_unlock_bh(&ctx->mtx); 1312 } else if (dev->net != NULL) { 1313 ctx->tx_reason_timeout++; /* count reason for transmitting */ 1314 spin_unlock_bh(&ctx->mtx); 1315 netif_tx_lock_bh(dev->net); 1316 usbnet_start_xmit(NULL, dev->net); 1317 netif_tx_unlock_bh(dev->net); 1318 } else { 1319 spin_unlock_bh(&ctx->mtx); 1320 } 1321 } 1322 1323 struct sk_buff * 1324 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1325 { 1326 struct sk_buff *skb_out; 1327 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1328 1329 /* 1330 * The Ethernet API we are using does not support transmitting 1331 * multiple Ethernet frames in a single call. This driver will 1332 * accumulate multiple Ethernet frames and send out a larger 1333 * USB frame when the USB buffer is full or when a single jiffies 1334 * timeout happens. 1335 */ 1336 if (ctx == NULL) 1337 goto error; 1338 1339 spin_lock_bh(&ctx->mtx); 1340 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 1341 spin_unlock_bh(&ctx->mtx); 1342 return skb_out; 1343 1344 error: 1345 if (skb != NULL) 1346 dev_kfree_skb_any(skb); 1347 1348 return NULL; 1349 } 1350 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1351 1352 /* verify NTB header and return offset of first NDP, or negative error */ 1353 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1354 { 1355 struct usbnet *dev = netdev_priv(skb_in->dev); 1356 struct usb_cdc_ncm_nth16 *nth16; 1357 int len; 1358 int ret = -EINVAL; 1359 1360 if (ctx == NULL) 1361 goto error; 1362 1363 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1364 sizeof(struct usb_cdc_ncm_ndp16))) { 1365 netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1366 goto error; 1367 } 1368 1369 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1370 1371 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 1372 netif_dbg(dev, rx_err, dev->net, 1373 "invalid NTH16 signature <%#010x>\n", 1374 le32_to_cpu(nth16->dwSignature)); 1375 goto error; 1376 } 1377 1378 len = le16_to_cpu(nth16->wBlockLength); 1379 if (len > ctx->rx_max) { 1380 netif_dbg(dev, rx_err, dev->net, 1381 "unsupported NTB block length %u/%u\n", len, 1382 ctx->rx_max); 1383 goto error; 1384 } 1385 1386 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1387 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1388 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1389 netif_dbg(dev, rx_err, dev->net, 1390 "sequence number glitch prev=%d curr=%d\n", 1391 ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1392 } 1393 ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1394 1395 ret = le16_to_cpu(nth16->wNdpIndex); 1396 error: 1397 return ret; 1398 } 1399 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1400 1401 /* verify NDP header and return number of datagrams, or negative error */ 1402 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1403 { 1404 struct usbnet *dev = netdev_priv(skb_in->dev); 1405 struct usb_cdc_ncm_ndp16 *ndp16; 1406 int ret = -EINVAL; 1407 1408 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1409 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1410 ndpoffset); 1411 goto error; 1412 } 1413 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1414 1415 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1416 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1417 le16_to_cpu(ndp16->wLength)); 1418 goto error; 1419 } 1420 1421 ret = ((le16_to_cpu(ndp16->wLength) - 1422 sizeof(struct usb_cdc_ncm_ndp16)) / 1423 sizeof(struct usb_cdc_ncm_dpe16)); 1424 ret--; /* we process NDP entries except for the last one */ 1425 1426 if ((sizeof(struct usb_cdc_ncm_ndp16) + 1427 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1428 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1429 ret = -EINVAL; 1430 } 1431 1432 error: 1433 return ret; 1434 } 1435 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1436 1437 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1438 { 1439 struct sk_buff *skb; 1440 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1441 int len; 1442 int nframes; 1443 int x; 1444 int offset; 1445 struct usb_cdc_ncm_ndp16 *ndp16; 1446 struct usb_cdc_ncm_dpe16 *dpe16; 1447 int ndpoffset; 1448 int loopcount = 50; /* arbitrary max preventing infinite loop */ 1449 u32 payload = 0; 1450 1451 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 1452 if (ndpoffset < 0) 1453 goto error; 1454 1455 next_ndp: 1456 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1457 if (nframes < 0) 1458 goto error; 1459 1460 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1461 1462 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 1463 netif_dbg(dev, rx_err, dev->net, 1464 "invalid DPT16 signature <%#010x>\n", 1465 le32_to_cpu(ndp16->dwSignature)); 1466 goto err_ndp; 1467 } 1468 dpe16 = ndp16->dpe16; 1469 1470 for (x = 0; x < nframes; x++, dpe16++) { 1471 offset = le16_to_cpu(dpe16->wDatagramIndex); 1472 len = le16_to_cpu(dpe16->wDatagramLength); 1473 1474 /* 1475 * CDC NCM ch. 3.7 1476 * All entries after first NULL entry are to be ignored 1477 */ 1478 if ((offset == 0) || (len == 0)) { 1479 if (!x) 1480 goto err_ndp; /* empty NTB */ 1481 break; 1482 } 1483 1484 /* sanity checking */ 1485 if (((offset + len) > skb_in->len) || 1486 (len > ctx->rx_max) || (len < ETH_HLEN)) { 1487 netif_dbg(dev, rx_err, dev->net, 1488 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1489 x, offset, len, skb_in); 1490 if (!x) 1491 goto err_ndp; 1492 break; 1493 1494 } else { 1495 /* create a fresh copy to reduce truesize */ 1496 skb = netdev_alloc_skb_ip_align(dev->net, len); 1497 if (!skb) 1498 goto error; 1499 memcpy(skb_put(skb, len), skb_in->data + offset, len); 1500 usbnet_skb_return(dev, skb); 1501 payload += len; /* count payload bytes in this NTB */ 1502 } 1503 } 1504 err_ndp: 1505 /* are there more NDPs to process? */ 1506 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1507 if (ndpoffset && loopcount--) 1508 goto next_ndp; 1509 1510 /* update stats */ 1511 ctx->rx_overhead += skb_in->len - payload; 1512 ctx->rx_ntbs++; 1513 1514 return 1; 1515 error: 1516 return 0; 1517 } 1518 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1519 1520 static void 1521 cdc_ncm_speed_change(struct usbnet *dev, 1522 struct usb_cdc_speed_change *data) 1523 { 1524 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 1525 uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1526 1527 /* 1528 * Currently the USB-NET API does not support reporting the actual 1529 * device speed. Do print it instead. 1530 */ 1531 if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1532 netif_info(dev, link, dev->net, 1533 "%u mbit/s downlink %u mbit/s uplink\n", 1534 (unsigned int)(rx_speed / 1000000U), 1535 (unsigned int)(tx_speed / 1000000U)); 1536 } else { 1537 netif_info(dev, link, dev->net, 1538 "%u kbit/s downlink %u kbit/s uplink\n", 1539 (unsigned int)(rx_speed / 1000U), 1540 (unsigned int)(tx_speed / 1000U)); 1541 } 1542 } 1543 1544 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1545 { 1546 struct cdc_ncm_ctx *ctx; 1547 struct usb_cdc_notification *event; 1548 1549 ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1550 1551 if (urb->actual_length < sizeof(*event)) 1552 return; 1553 1554 /* test for split data in 8-byte chunks */ 1555 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1556 cdc_ncm_speed_change(dev, 1557 (struct usb_cdc_speed_change *)urb->transfer_buffer); 1558 return; 1559 } 1560 1561 event = urb->transfer_buffer; 1562 1563 switch (event->bNotificationType) { 1564 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1565 /* 1566 * According to the CDC NCM specification ch.7.1 1567 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1568 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1569 */ 1570 netif_info(dev, link, dev->net, 1571 "network connection: %sconnected\n", 1572 !!event->wValue ? "" : "dis"); 1573 usbnet_link_change(dev, !!event->wValue, 0); 1574 break; 1575 1576 case USB_CDC_NOTIFY_SPEED_CHANGE: 1577 if (urb->actual_length < (sizeof(*event) + 1578 sizeof(struct usb_cdc_speed_change))) 1579 set_bit(EVENT_STS_SPLIT, &dev->flags); 1580 else 1581 cdc_ncm_speed_change(dev, 1582 (struct usb_cdc_speed_change *)&event[1]); 1583 break; 1584 1585 default: 1586 dev_dbg(&dev->udev->dev, 1587 "NCM: unexpected notification 0x%02x!\n", 1588 event->bNotificationType); 1589 break; 1590 } 1591 } 1592 1593 static const struct driver_info cdc_ncm_info = { 1594 .description = "CDC NCM", 1595 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1596 | FLAG_LINK_INTR, 1597 .bind = cdc_ncm_bind, 1598 .unbind = cdc_ncm_unbind, 1599 .manage_power = usbnet_manage_power, 1600 .status = cdc_ncm_status, 1601 .rx_fixup = cdc_ncm_rx_fixup, 1602 .tx_fixup = cdc_ncm_tx_fixup, 1603 }; 1604 1605 /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1606 static const struct driver_info wwan_info = { 1607 .description = "Mobile Broadband Network Device", 1608 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1609 | FLAG_LINK_INTR | FLAG_WWAN, 1610 .bind = cdc_ncm_bind, 1611 .unbind = cdc_ncm_unbind, 1612 .manage_power = usbnet_manage_power, 1613 .status = cdc_ncm_status, 1614 .rx_fixup = cdc_ncm_rx_fixup, 1615 .tx_fixup = cdc_ncm_tx_fixup, 1616 }; 1617 1618 /* Same as wwan_info, but with FLAG_NOARP */ 1619 static const struct driver_info wwan_noarp_info = { 1620 .description = "Mobile Broadband Network Device (NO ARP)", 1621 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1622 | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, 1623 .bind = cdc_ncm_bind, 1624 .unbind = cdc_ncm_unbind, 1625 .manage_power = usbnet_manage_power, 1626 .status = cdc_ncm_status, 1627 .rx_fixup = cdc_ncm_rx_fixup, 1628 .tx_fixup = cdc_ncm_tx_fixup, 1629 }; 1630 1631 static const struct usb_device_id cdc_devs[] = { 1632 /* Ericsson MBM devices like F5521gw */ 1633 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1634 | USB_DEVICE_ID_MATCH_VENDOR, 1635 .idVendor = 0x0bdb, 1636 .bInterfaceClass = USB_CLASS_COMM, 1637 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1638 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1639 .driver_info = (unsigned long) &wwan_info, 1640 }, 1641 1642 /* Telit LE910 V2 */ 1643 { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, 1644 USB_CLASS_COMM, 1645 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1646 .driver_info = (unsigned long)&wwan_noarp_info, 1647 }, 1648 1649 /* DW5812 LTE Verizon Mobile Broadband Card 1650 * Unlike DW5550 this device requires FLAG_NOARP 1651 */ 1652 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, 1653 USB_CLASS_COMM, 1654 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1655 .driver_info = (unsigned long)&wwan_noarp_info, 1656 }, 1657 1658 /* DW5813 LTE AT&T Mobile Broadband Card 1659 * Unlike DW5550 this device requires FLAG_NOARP 1660 */ 1661 { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, 1662 USB_CLASS_COMM, 1663 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1664 .driver_info = (unsigned long)&wwan_noarp_info, 1665 }, 1666 1667 /* Dell branded MBM devices like DW5550 */ 1668 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1669 | USB_DEVICE_ID_MATCH_VENDOR, 1670 .idVendor = 0x413c, 1671 .bInterfaceClass = USB_CLASS_COMM, 1672 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1673 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1674 .driver_info = (unsigned long) &wwan_info, 1675 }, 1676 1677 /* Toshiba branded MBM devices */ 1678 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1679 | USB_DEVICE_ID_MATCH_VENDOR, 1680 .idVendor = 0x0930, 1681 .bInterfaceClass = USB_CLASS_COMM, 1682 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1683 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1684 .driver_info = (unsigned long) &wwan_info, 1685 }, 1686 1687 /* tag Huawei devices as wwan */ 1688 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 1689 USB_CLASS_COMM, 1690 USB_CDC_SUBCLASS_NCM, 1691 USB_CDC_PROTO_NONE), 1692 .driver_info = (unsigned long)&wwan_info, 1693 }, 1694 1695 /* Infineon(now Intel) HSPA Modem platform */ 1696 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 1697 USB_CLASS_COMM, 1698 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1699 .driver_info = (unsigned long)&wwan_noarp_info, 1700 }, 1701 1702 /* Generic CDC-NCM devices */ 1703 { USB_INTERFACE_INFO(USB_CLASS_COMM, 1704 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1705 .driver_info = (unsigned long)&cdc_ncm_info, 1706 }, 1707 { 1708 }, 1709 }; 1710 MODULE_DEVICE_TABLE(usb, cdc_devs); 1711 1712 static struct usb_driver cdc_ncm_driver = { 1713 .name = "cdc_ncm", 1714 .id_table = cdc_devs, 1715 .probe = usbnet_probe, 1716 .disconnect = usbnet_disconnect, 1717 .suspend = usbnet_suspend, 1718 .resume = usbnet_resume, 1719 .reset_resume = usbnet_resume, 1720 .supports_autosuspend = 1, 1721 .disable_hub_initiated_lpm = 1, 1722 }; 1723 1724 module_usb_driver(cdc_ncm_driver); 1725 1726 MODULE_AUTHOR("Hans Petter Selasky"); 1727 MODULE_DESCRIPTION("USB CDC NCM host driver"); 1728 MODULE_LICENSE("Dual BSD/GPL"); 1729