1900d495aSAlexey Orishko /* 2900d495aSAlexey Orishko * cdc_ncm.c 3900d495aSAlexey Orishko * 4c84ff1d6SAlexey Orishko * Copyright (C) ST-Ericsson 2010-2012 5900d495aSAlexey Orishko * Contact: Alexey Orishko <alexey.orishko@stericsson.com> 6900d495aSAlexey Orishko * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> 7900d495aSAlexey Orishko * 8900d495aSAlexey Orishko * USB Host Driver for Network Control Model (NCM) 922401ff1SEnrico Mioso * http://www.usb.org/developers/docs/devclass_docs/NCM10_012011.zip 10900d495aSAlexey Orishko * 11900d495aSAlexey Orishko * The NCM encoding, decoding and initialization logic 12900d495aSAlexey Orishko * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h 13900d495aSAlexey Orishko * 14900d495aSAlexey Orishko * This software is available to you under a choice of one of two 15900d495aSAlexey Orishko * licenses. You may choose this file to be licensed under the terms 16900d495aSAlexey Orishko * of the GNU General Public License (GPL) Version 2 or the 2-clause 17900d495aSAlexey Orishko * BSD license listed below: 18900d495aSAlexey Orishko * 19900d495aSAlexey Orishko * Redistribution and use in source and binary forms, with or without 20900d495aSAlexey Orishko * modification, are permitted provided that the following conditions 21900d495aSAlexey Orishko * are met: 22900d495aSAlexey Orishko * 1. Redistributions of source code must retain the above copyright 23900d495aSAlexey Orishko * notice, this list of conditions and the following disclaimer. 24900d495aSAlexey Orishko * 2. Redistributions in binary form must reproduce the above copyright 25900d495aSAlexey Orishko * notice, this list of conditions and the following disclaimer in the 26900d495aSAlexey Orishko * documentation and/or other materials provided with the distribution. 27900d495aSAlexey Orishko * 28900d495aSAlexey Orishko * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 29900d495aSAlexey Orishko * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30900d495aSAlexey Orishko * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31900d495aSAlexey Orishko * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 32900d495aSAlexey Orishko * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33900d495aSAlexey Orishko * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34900d495aSAlexey Orishko * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35900d495aSAlexey Orishko * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36900d495aSAlexey Orishko * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37900d495aSAlexey Orishko * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38900d495aSAlexey Orishko * SUCH DAMAGE. 39900d495aSAlexey Orishko */ 40900d495aSAlexey Orishko 41900d495aSAlexey Orishko #include <linux/module.h> 42900d495aSAlexey Orishko #include <linux/netdevice.h> 43900d495aSAlexey Orishko #include <linux/ctype.h> 44900d495aSAlexey Orishko #include <linux/ethtool.h> 45900d495aSAlexey Orishko #include <linux/workqueue.h> 46900d495aSAlexey Orishko #include <linux/mii.h> 47900d495aSAlexey Orishko #include <linux/crc32.h> 48900d495aSAlexey Orishko #include <linux/usb.h> 49c84ff1d6SAlexey Orishko #include <linux/hrtimer.h> 50900d495aSAlexey Orishko #include <linux/atomic.h> 51900d495aSAlexey Orishko #include <linux/usb/usbnet.h> 52900d495aSAlexey Orishko #include <linux/usb/cdc.h> 53c91ce3b6SBjørn Mork #include <linux/usb/cdc_ncm.h> 54900d495aSAlexey Orishko 551e8bbe6cSBjørn Mork #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 561e8bbe6cSBjørn Mork static bool prefer_mbim = true; 571e8bbe6cSBjørn Mork #else 581e8bbe6cSBjørn Mork static bool prefer_mbim; 591e8bbe6cSBjørn Mork #endif 601e8bbe6cSBjørn Mork module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 611e8bbe6cSBjørn Mork MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 621e8bbe6cSBjørn Mork 63c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param); 64c84ff1d6SAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 65c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 66900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver; 67900d495aSAlexey Orishko 68beeecd42SBjørn Mork struct cdc_ncm_stats { 69beeecd42SBjørn Mork char stat_string[ETH_GSTRING_LEN]; 70beeecd42SBjørn Mork int sizeof_stat; 71beeecd42SBjørn Mork int stat_offset; 72beeecd42SBjørn Mork }; 73beeecd42SBjørn Mork 74beeecd42SBjørn Mork #define CDC_NCM_STAT(str, m) { \ 75beeecd42SBjørn Mork .stat_string = str, \ 76beeecd42SBjørn Mork .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ 77beeecd42SBjørn Mork .stat_offset = offsetof(struct cdc_ncm_ctx, m) } 78beeecd42SBjørn Mork #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) 79beeecd42SBjørn Mork 80beeecd42SBjørn Mork static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { 81beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), 82beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), 83beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_timeout), 84beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), 85beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_overhead), 86beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_ntbs), 87beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(rx_overhead), 88beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(rx_ntbs), 89beeecd42SBjørn Mork }; 90beeecd42SBjørn Mork 91beeecd42SBjørn Mork static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) 92beeecd42SBjørn Mork { 93beeecd42SBjørn Mork switch (sset) { 94beeecd42SBjørn Mork case ETH_SS_STATS: 95beeecd42SBjørn Mork return ARRAY_SIZE(cdc_ncm_gstrings_stats); 96beeecd42SBjørn Mork default: 97beeecd42SBjørn Mork return -EOPNOTSUPP; 98beeecd42SBjørn Mork } 99beeecd42SBjørn Mork } 100beeecd42SBjørn Mork 101beeecd42SBjørn Mork static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, 102beeecd42SBjørn Mork struct ethtool_stats __always_unused *stats, 103beeecd42SBjørn Mork u64 *data) 104beeecd42SBjørn Mork { 105beeecd42SBjørn Mork struct usbnet *dev = netdev_priv(netdev); 106beeecd42SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 107beeecd42SBjørn Mork int i; 108beeecd42SBjørn Mork char *p = NULL; 109beeecd42SBjørn Mork 110beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 111beeecd42SBjørn Mork p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; 112beeecd42SBjørn Mork data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; 113beeecd42SBjørn Mork } 114beeecd42SBjørn Mork } 115beeecd42SBjørn Mork 116beeecd42SBjørn Mork static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) 117beeecd42SBjørn Mork { 118beeecd42SBjørn Mork u8 *p = data; 119beeecd42SBjørn Mork int i; 120beeecd42SBjørn Mork 121beeecd42SBjørn Mork switch (stringset) { 122beeecd42SBjørn Mork case ETH_SS_STATS: 123beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 124beeecd42SBjørn Mork memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); 125beeecd42SBjørn Mork p += ETH_GSTRING_LEN; 126beeecd42SBjørn Mork } 127beeecd42SBjørn Mork } 128beeecd42SBjørn Mork } 129beeecd42SBjørn Mork 1306c4e548fSBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); 1316c4e548fSBjørn Mork 1326c4e548fSBjørn Mork static const struct ethtool_ops cdc_ncm_ethtool_ops = { 1336c4e548fSBjørn Mork .get_settings = usbnet_get_settings, 1346c4e548fSBjørn Mork .set_settings = usbnet_set_settings, 1356c4e548fSBjørn Mork .get_link = usbnet_get_link, 1366c4e548fSBjørn Mork .nway_reset = usbnet_nway_reset, 1376c4e548fSBjørn Mork .get_drvinfo = usbnet_get_drvinfo, 1386c4e548fSBjørn Mork .get_msglevel = usbnet_get_msglevel, 1396c4e548fSBjørn Mork .set_msglevel = usbnet_set_msglevel, 1406c4e548fSBjørn Mork .get_ts_info = ethtool_op_get_ts_info, 141beeecd42SBjørn Mork .get_sset_count = cdc_ncm_get_sset_count, 142beeecd42SBjørn Mork .get_strings = cdc_ncm_get_strings, 143beeecd42SBjørn Mork .get_ethtool_stats = cdc_ncm_get_ethtool_stats, 1446c4e548fSBjørn Mork }; 1456c4e548fSBjørn Mork 146289507d3SBjørn Mork static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) 1475aa73d5dSBjørn Mork { 1485aa73d5dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1495aa73d5dSBjørn Mork u32 val, max, min; 1505aa73d5dSBjørn Mork 1515aa73d5dSBjørn Mork /* clamp new_rx to sane values */ 1525aa73d5dSBjørn Mork min = USB_CDC_NCM_NTB_MIN_IN_SIZE; 1535aa73d5dSBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 1545aa73d5dSBjørn Mork 1555aa73d5dSBjørn Mork /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ 1565aa73d5dSBjørn Mork if (max < min) { 1575aa73d5dSBjørn Mork dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", 1585aa73d5dSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); 1595aa73d5dSBjørn Mork max = min; 1605aa73d5dSBjørn Mork } 1615aa73d5dSBjørn Mork 1625aa73d5dSBjørn Mork val = clamp_t(u32, new_rx, min, max); 163289507d3SBjørn Mork if (val != new_rx) 164289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); 165289507d3SBjørn Mork 166289507d3SBjørn Mork return val; 1675aa73d5dSBjørn Mork } 1685aa73d5dSBjørn Mork 169289507d3SBjørn Mork static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) 170289507d3SBjørn Mork { 171289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 172289507d3SBjørn Mork u32 val, max, min; 173289507d3SBjørn Mork 174289507d3SBjørn Mork /* clamp new_tx to sane values */ 175289507d3SBjørn Mork min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); 176289507d3SBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 177289507d3SBjørn Mork 178289507d3SBjørn Mork /* some devices set dwNtbOutMaxSize too low for the above default */ 179289507d3SBjørn Mork min = min(min, max); 180289507d3SBjørn Mork 181289507d3SBjørn Mork val = clamp_t(u32, new_tx, min, max); 182289507d3SBjørn Mork if (val != new_tx) 183289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); 184289507d3SBjørn Mork 185289507d3SBjørn Mork return val; 186289507d3SBjørn Mork } 187289507d3SBjørn Mork 18839eb7e0eSBjørn Mork static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) 18939eb7e0eSBjørn Mork { 19039eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 19139eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 19239eb7e0eSBjørn Mork 19339eb7e0eSBjørn Mork return sprintf(buf, "%u\n", ctx->min_tx_pkt); 19439eb7e0eSBjørn Mork } 19539eb7e0eSBjørn Mork 196289507d3SBjørn Mork static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) 197289507d3SBjørn Mork { 198289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 199289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 200289507d3SBjørn Mork 201289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->rx_max); 202289507d3SBjørn Mork } 203289507d3SBjørn Mork 204289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) 205289507d3SBjørn Mork { 206289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 207289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 208289507d3SBjørn Mork 209289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->tx_max); 210289507d3SBjørn Mork } 211289507d3SBjørn Mork 212289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) 213289507d3SBjørn Mork { 214289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 215289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 216289507d3SBjørn Mork 217289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); 218289507d3SBjørn Mork } 219289507d3SBjørn Mork 22039eb7e0eSBjørn Mork static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 22139eb7e0eSBjørn Mork { 22239eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 22339eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 22439eb7e0eSBjørn Mork unsigned long val; 22539eb7e0eSBjørn Mork 22639eb7e0eSBjørn Mork /* no need to restrict values - anything from 0 to infinity is OK */ 22739eb7e0eSBjørn Mork if (kstrtoul(buf, 0, &val)) 22839eb7e0eSBjørn Mork return -EINVAL; 22939eb7e0eSBjørn Mork 23039eb7e0eSBjørn Mork ctx->min_tx_pkt = val; 23139eb7e0eSBjørn Mork return len; 23239eb7e0eSBjørn Mork } 23339eb7e0eSBjørn Mork 234289507d3SBjørn Mork static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 235289507d3SBjørn Mork { 236289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 237289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 238289507d3SBjørn Mork unsigned long val; 239289507d3SBjørn Mork 240289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) 241289507d3SBjørn Mork return -EINVAL; 242289507d3SBjørn Mork 243289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); 244289507d3SBjørn Mork return len; 245289507d3SBjørn Mork } 246289507d3SBjørn Mork 247289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 248289507d3SBjørn Mork { 249289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 250289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 251289507d3SBjørn Mork unsigned long val; 252289507d3SBjørn Mork 253289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) 254289507d3SBjørn Mork return -EINVAL; 255289507d3SBjørn Mork 256289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); 257289507d3SBjørn Mork return len; 258289507d3SBjørn Mork } 259289507d3SBjørn Mork 260289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 261289507d3SBjørn Mork { 262289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 263289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 264289507d3SBjørn Mork ssize_t ret; 265289507d3SBjørn Mork unsigned long val; 266289507d3SBjørn Mork 267289507d3SBjørn Mork ret = kstrtoul(buf, 0, &val); 268289507d3SBjørn Mork if (ret) 269289507d3SBjørn Mork return ret; 270289507d3SBjørn Mork if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) 271289507d3SBjørn Mork return -EINVAL; 272289507d3SBjørn Mork 273289507d3SBjørn Mork spin_lock_bh(&ctx->mtx); 274289507d3SBjørn Mork ctx->timer_interval = val * NSEC_PER_USEC; 275289507d3SBjørn Mork if (!ctx->timer_interval) 276289507d3SBjørn Mork ctx->tx_timer_pending = 0; 277289507d3SBjørn Mork spin_unlock_bh(&ctx->mtx); 278289507d3SBjørn Mork return len; 279289507d3SBjørn Mork } 280289507d3SBjørn Mork 28139eb7e0eSBjørn Mork static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); 282289507d3SBjørn Mork static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); 283289507d3SBjørn Mork static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); 284289507d3SBjørn Mork static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); 285289507d3SBjørn Mork 286871578c9SBjørn Mork #define NCM_PARM_ATTR(name, format, tocpu) \ 287871578c9SBjørn Mork static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ 288871578c9SBjørn Mork { \ 289871578c9SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); \ 290871578c9SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ 291871578c9SBjørn Mork return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ 292871578c9SBjørn Mork } \ 293871578c9SBjørn Mork static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) 294871578c9SBjørn Mork 295871578c9SBjørn Mork NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); 296871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 297871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); 298871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); 299871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); 300871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); 301871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); 302871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); 303871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); 304871578c9SBjørn Mork NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); 305871578c9SBjørn Mork 306289507d3SBjørn Mork static struct attribute *cdc_ncm_sysfs_attrs[] = { 30739eb7e0eSBjørn Mork &dev_attr_min_tx_pkt.attr, 308289507d3SBjørn Mork &dev_attr_rx_max.attr, 309289507d3SBjørn Mork &dev_attr_tx_max.attr, 310289507d3SBjørn Mork &dev_attr_tx_timer_usecs.attr, 311871578c9SBjørn Mork &dev_attr_bmNtbFormatsSupported.attr, 312871578c9SBjørn Mork &dev_attr_dwNtbInMaxSize.attr, 313871578c9SBjørn Mork &dev_attr_wNdpInDivisor.attr, 314871578c9SBjørn Mork &dev_attr_wNdpInPayloadRemainder.attr, 315871578c9SBjørn Mork &dev_attr_wNdpInAlignment.attr, 316871578c9SBjørn Mork &dev_attr_dwNtbOutMaxSize.attr, 317871578c9SBjørn Mork &dev_attr_wNdpOutDivisor.attr, 318871578c9SBjørn Mork &dev_attr_wNdpOutPayloadRemainder.attr, 319871578c9SBjørn Mork &dev_attr_wNdpOutAlignment.attr, 320871578c9SBjørn Mork &dev_attr_wNtbOutMaxDatagrams.attr, 321289507d3SBjørn Mork NULL, 322289507d3SBjørn Mork }; 323289507d3SBjørn Mork 324289507d3SBjørn Mork static struct attribute_group cdc_ncm_sysfs_attr_group = { 325289507d3SBjørn Mork .name = "cdc_ncm", 326289507d3SBjørn Mork .attrs = cdc_ncm_sysfs_attrs, 327289507d3SBjørn Mork }; 328289507d3SBjørn Mork 329289507d3SBjørn Mork /* handle rx_max and tx_max changes */ 330289507d3SBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) 331289507d3SBjørn Mork { 332289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 333289507d3SBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 334289507d3SBjørn Mork u32 val; 335289507d3SBjørn Mork 336289507d3SBjørn Mork val = cdc_ncm_check_rx_max(dev, new_rx); 337289507d3SBjørn Mork 3385aa73d5dSBjørn Mork /* inform device about NTB input size changes */ 3395aa73d5dSBjørn Mork if (val != ctx->rx_max) { 3405aa73d5dSBjørn Mork __le32 dwNtbInMaxSize = cpu_to_le32(val); 3415aa73d5dSBjørn Mork 3425aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); 34368864abfSBjørn Mork 34468864abfSBjørn Mork /* tell device to use new size */ 3455aa73d5dSBjørn Mork if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 3465aa73d5dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 3475aa73d5dSBjørn Mork | USB_RECIP_INTERFACE, 3485aa73d5dSBjørn Mork 0, iface_no, &dwNtbInMaxSize, 4) < 0) 3495aa73d5dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 3505aa73d5dSBjørn Mork else 3515aa73d5dSBjørn Mork ctx->rx_max = val; 3525aa73d5dSBjørn Mork } 3535aa73d5dSBjørn Mork 354f42763dbSBjørn Mork /* usbnet use these values for sizing rx queues */ 355f42763dbSBjørn Mork if (dev->rx_urb_size != ctx->rx_max) { 356f42763dbSBjørn Mork dev->rx_urb_size = ctx->rx_max; 357f42763dbSBjørn Mork if (netif_running(dev->net)) 358f42763dbSBjørn Mork usbnet_unlink_rx_urbs(dev); 359f42763dbSBjørn Mork } 360f42763dbSBjørn Mork 361289507d3SBjørn Mork val = cdc_ncm_check_tx_max(dev, new_tx); 3625aa73d5dSBjørn Mork if (val != ctx->tx_max) 3635aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); 36408c74fc9SBjørn Mork 36508c74fc9SBjørn Mork /* Adding a pad byte here if necessary simplifies the handling 36608c74fc9SBjørn Mork * in cdc_ncm_fill_tx_frame, making tx_max always represent 36708c74fc9SBjørn Mork * the real skb max size. 36808c74fc9SBjørn Mork * 36908c74fc9SBjørn Mork * We cannot use dev->maxpacket here because this is called from 37008c74fc9SBjørn Mork * .bind which is called before usbnet sets up dev->maxpacket 37108c74fc9SBjørn Mork */ 37268864abfSBjørn Mork if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 37368864abfSBjørn Mork val % usb_maxpacket(dev->udev, dev->out, 1) == 0) 37468864abfSBjørn Mork val++; 37508c74fc9SBjørn Mork 37668864abfSBjørn Mork /* we might need to flush any pending tx buffers if running */ 37768864abfSBjørn Mork if (netif_running(dev->net) && val > ctx->tx_max) { 37868864abfSBjørn Mork netif_tx_lock_bh(dev->net); 37968864abfSBjørn Mork usbnet_start_xmit(NULL, dev->net); 3801ba5d0ffSBjørn Mork /* make sure tx_curr_skb is reallocated if it was empty */ 3811ba5d0ffSBjørn Mork if (ctx->tx_curr_skb) { 3821ba5d0ffSBjørn Mork dev_kfree_skb_any(ctx->tx_curr_skb); 3831ba5d0ffSBjørn Mork ctx->tx_curr_skb = NULL; 3841ba5d0ffSBjørn Mork } 38568864abfSBjørn Mork ctx->tx_max = val; 38668864abfSBjørn Mork netif_tx_unlock_bh(dev->net); 38768864abfSBjørn Mork } else { 38868864abfSBjørn Mork ctx->tx_max = val; 38968864abfSBjørn Mork } 39068864abfSBjørn Mork 39108c74fc9SBjørn Mork dev->hard_mtu = ctx->tx_max; 39268864abfSBjørn Mork 39368864abfSBjørn Mork /* max qlen depend on hard_mtu and rx_urb_size */ 39468864abfSBjørn Mork usbnet_update_max_qlen(dev); 39543e4c6dfSBjørn Mork 39643e4c6dfSBjørn Mork /* never pad more than 3 full USB packets per transfer */ 39743e4c6dfSBjørn Mork ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), 39843e4c6dfSBjørn Mork CDC_NCM_MIN_TX_PKT, ctx->tx_max); 3995aa73d5dSBjørn Mork } 4005aa73d5dSBjørn Mork 401f8afb73dSBjørn Mork /* helpers for NCM and MBIM differences */ 402f8afb73dSBjørn Mork static u8 cdc_ncm_flags(struct usbnet *dev) 403900d495aSAlexey Orishko { 404bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 405900d495aSAlexey Orishko 406f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 407f8afb73dSBjørn Mork return ctx->mbim_desc->bmNetworkCapabilities; 408f8afb73dSBjørn Mork if (ctx->func_desc) 409f8afb73dSBjørn Mork return ctx->func_desc->bmNetworkCapabilities; 410f8afb73dSBjørn Mork return 0; 411f8afb73dSBjørn Mork } 412f8afb73dSBjørn Mork 413f8afb73dSBjørn Mork static int cdc_ncm_eth_hlen(struct usbnet *dev) 414f8afb73dSBjørn Mork { 415f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 416f8afb73dSBjørn Mork return 0; 417f8afb73dSBjørn Mork return ETH_HLEN; 418f8afb73dSBjørn Mork } 419f8afb73dSBjørn Mork 420f8afb73dSBjørn Mork static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) 421f8afb73dSBjørn Mork { 422f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 423f8afb73dSBjørn Mork return CDC_MBIM_MIN_DATAGRAM_SIZE; 424f8afb73dSBjørn Mork return CDC_NCM_MIN_DATAGRAM_SIZE; 425f8afb73dSBjørn Mork } 426f8afb73dSBjørn Mork 427f8afb73dSBjørn Mork static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) 428f8afb73dSBjørn Mork { 429f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 430f8afb73dSBjørn Mork 431f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 432f8afb73dSBjørn Mork return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 433f8afb73dSBjørn Mork if (ctx->ether_desc) 434f8afb73dSBjørn Mork return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 435f8afb73dSBjørn Mork return CDC_NCM_MAX_DATAGRAM_SIZE; 436f8afb73dSBjørn Mork } 437f8afb73dSBjørn Mork 438f8afb73dSBjørn Mork /* initial one-time device setup. MUST be called with the data interface 439f8afb73dSBjørn Mork * in altsetting 0 440f8afb73dSBjørn Mork */ 441f8afb73dSBjørn Mork static int cdc_ncm_init(struct usbnet *dev) 442f8afb73dSBjørn Mork { 443f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 444f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 445f8afb73dSBjørn Mork int err; 446900d495aSAlexey Orishko 44790b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 44836c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 44936c35416SGiuseppe Scrivano |USB_RECIP_INTERFACE, 450ff0992e9SBjørn Mork 0, iface_no, &ctx->ncm_parm, 451ff0992e9SBjørn Mork sizeof(ctx->ncm_parm)); 45236c35416SGiuseppe Scrivano if (err < 0) { 45359ede316SBjørn Mork dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 45459ede316SBjørn Mork return err; /* GET_NTB_PARAMETERS is required */ 455900d495aSAlexey Orishko } 456900d495aSAlexey Orishko 457f8afb73dSBjørn Mork /* set CRC Mode */ 458f8afb73dSBjørn Mork if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { 459f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); 460f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 461f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 462f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 463f8afb73dSBjørn Mork USB_CDC_NCM_CRC_NOT_APPENDED, 464f8afb73dSBjørn Mork iface_no, NULL, 0); 465f8afb73dSBjørn Mork if (err < 0) 466f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); 467f8afb73dSBjørn Mork } 468f8afb73dSBjørn Mork 469f8afb73dSBjørn Mork /* set NTB format, if both formats are supported. 470f8afb73dSBjørn Mork * 471f8afb73dSBjørn Mork * "The host shall only send this command while the NCM Data 472f8afb73dSBjørn Mork * Interface is in alternate setting 0." 473f8afb73dSBjørn Mork */ 474d22adbfbSDan Carpenter if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & 475d22adbfbSDan Carpenter USB_CDC_NCM_NTB32_SUPPORTED) { 476f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); 477f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 478f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 479f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 480f8afb73dSBjørn Mork USB_CDC_NCM_NTB16_FORMAT, 481f8afb73dSBjørn Mork iface_no, NULL, 0); 482f8afb73dSBjørn Mork if (err < 0) 483f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); 484f8afb73dSBjørn Mork } 485f8afb73dSBjørn Mork 486f8afb73dSBjørn Mork /* set initial device values */ 487ff0992e9SBjørn Mork ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 488ff0992e9SBjørn Mork ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 489ff0992e9SBjørn Mork ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 490ff0992e9SBjørn Mork ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 491ff0992e9SBjørn Mork ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 49284e77a8bSAlexey Orishko /* devices prior to NCM Errata shall set this field to zero */ 493ff0992e9SBjørn Mork ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 49447175e5fSBjørn Mork 495ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, 496ae223cd4SBjørn Mork "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 497900d495aSAlexey Orishko ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 498f8afb73dSBjørn Mork ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); 499900d495aSAlexey Orishko 50084e77a8bSAlexey Orishko /* max count of tx datagrams */ 50184e77a8bSAlexey Orishko if ((ctx->tx_max_datagrams == 0) || 50284e77a8bSAlexey Orishko (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 503900d495aSAlexey Orishko ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 504900d495aSAlexey Orishko 50570559b89SBjørn Mork /* set up maximum NDP size */ 50670559b89SBjørn Mork ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); 50770559b89SBjørn Mork 5086c4e548fSBjørn Mork /* initial coalescing timer interval */ 5096c4e548fSBjørn Mork ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; 5106c4e548fSBjørn Mork 511f8afb73dSBjørn Mork return 0; 512f8afb73dSBjørn Mork } 513f8afb73dSBjørn Mork 514f8afb73dSBjørn Mork /* set a new max datagram size */ 515f8afb73dSBjørn Mork static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) 516f8afb73dSBjørn Mork { 517f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 518f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 519f8afb73dSBjørn Mork __le16 max_datagram_size; 520f8afb73dSBjørn Mork u16 mbim_mtu; 521f8afb73dSBjørn Mork int err; 522f8afb73dSBjørn Mork 523f8afb73dSBjørn Mork /* set default based on descriptors */ 524f8afb73dSBjørn Mork ctx->max_datagram_size = clamp_t(u32, new_size, 525f8afb73dSBjørn Mork cdc_ncm_min_dgram_size(dev), 526f8afb73dSBjørn Mork CDC_NCM_MAX_DATAGRAM_SIZE); 527f8afb73dSBjørn Mork 528f8afb73dSBjørn Mork /* inform the device about the selected Max Datagram Size? */ 529f8afb73dSBjørn Mork if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 530f8afb73dSBjørn Mork goto out; 531f8afb73dSBjørn Mork 532f8afb73dSBjørn Mork /* read current mtu value from device */ 533f8afb73dSBjørn Mork err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 534f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 535f8afb73dSBjørn Mork 0, iface_no, &max_datagram_size, 2); 536f8afb73dSBjørn Mork if (err < 0) { 537f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 538f8afb73dSBjørn Mork goto out; 539f8afb73dSBjørn Mork } 540f8afb73dSBjørn Mork 541f8afb73dSBjørn Mork if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 542f8afb73dSBjørn Mork goto out; 543f8afb73dSBjørn Mork 544f8afb73dSBjørn Mork max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 545f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 546f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 547f8afb73dSBjørn Mork 0, iface_no, &max_datagram_size, 2); 548f8afb73dSBjørn Mork if (err < 0) 549f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 550f8afb73dSBjørn Mork 551f8afb73dSBjørn Mork out: 552f8afb73dSBjørn Mork /* set MTU to max supported by the device if necessary */ 553f8afb73dSBjørn Mork dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); 554f8afb73dSBjørn Mork 555f8afb73dSBjørn Mork /* do not exceed operater preferred MTU */ 556f8afb73dSBjørn Mork if (ctx->mbim_extended_desc) { 557f8afb73dSBjørn Mork mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 558f8afb73dSBjørn Mork if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 559f8afb73dSBjørn Mork dev->net->mtu = mbim_mtu; 560f8afb73dSBjørn Mork } 561f8afb73dSBjørn Mork } 562f8afb73dSBjørn Mork 563f8afb73dSBjørn Mork static void cdc_ncm_fix_modulus(struct usbnet *dev) 564f8afb73dSBjørn Mork { 565f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 566f8afb73dSBjørn Mork u32 val; 567900d495aSAlexey Orishko 568900d495aSAlexey Orishko /* 569900d495aSAlexey Orishko * verify that the structure alignment is: 570900d495aSAlexey Orishko * - power of two 571900d495aSAlexey Orishko * - not greater than the maximum transmit length 572900d495aSAlexey Orishko * - not less than four bytes 573900d495aSAlexey Orishko */ 574900d495aSAlexey Orishko val = ctx->tx_ndp_modulus; 575900d495aSAlexey Orishko 576900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 577900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 578ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 579900d495aSAlexey Orishko ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 580900d495aSAlexey Orishko } 581900d495aSAlexey Orishko 582900d495aSAlexey Orishko /* 583900d495aSAlexey Orishko * verify that the payload alignment is: 584900d495aSAlexey Orishko * - power of two 585900d495aSAlexey Orishko * - not greater than the maximum transmit length 586900d495aSAlexey Orishko * - not less than four bytes 587900d495aSAlexey Orishko */ 588900d495aSAlexey Orishko val = ctx->tx_modulus; 589900d495aSAlexey Orishko 590900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 591900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 592ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 593900d495aSAlexey Orishko ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 594900d495aSAlexey Orishko } 595900d495aSAlexey Orishko 596900d495aSAlexey Orishko /* verify the payload remainder */ 597900d495aSAlexey Orishko if (ctx->tx_remainder >= ctx->tx_modulus) { 598ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 599900d495aSAlexey Orishko ctx->tx_remainder = 0; 600900d495aSAlexey Orishko } 601900d495aSAlexey Orishko 602900d495aSAlexey Orishko /* adjust TX-remainder according to NCM specification. */ 603f8afb73dSBjørn Mork ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & 604900d495aSAlexey Orishko (ctx->tx_modulus - 1)); 60584e77a8bSAlexey Orishko } 606900d495aSAlexey Orishko 607f8afb73dSBjørn Mork static int cdc_ncm_setup(struct usbnet *dev) 608f8afb73dSBjørn Mork { 609f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 61050f1cb1cSBjørn Mork u32 def_rx, def_tx; 61150f1cb1cSBjørn Mork 61250f1cb1cSBjørn Mork /* be conservative when selecting intial buffer size to 61350f1cb1cSBjørn Mork * increase the number of hosts this will work for 61450f1cb1cSBjørn Mork */ 61550f1cb1cSBjørn Mork def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, 61650f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 61750f1cb1cSBjørn Mork def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, 61850f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 61984e77a8bSAlexey Orishko 620f8afb73dSBjørn Mork /* clamp rx_max and tx_max and inform device */ 62150f1cb1cSBjørn Mork cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); 6223f658cdeSAlexey Orishko 623f8afb73dSBjørn Mork /* sanitize the modulus and remainder values */ 624f8afb73dSBjørn Mork cdc_ncm_fix_modulus(dev); 625900d495aSAlexey Orishko 626f8afb73dSBjørn Mork /* set max datagram size */ 627f8afb73dSBjørn Mork cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); 628900d495aSAlexey Orishko return 0; 629900d495aSAlexey Orishko } 630900d495aSAlexey Orishko 631900d495aSAlexey Orishko static void 632ff1632aaSBjørn Mork cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 633900d495aSAlexey Orishko { 634ff1632aaSBjørn Mork struct usb_host_endpoint *e, *in = NULL, *out = NULL; 635900d495aSAlexey Orishko u8 ep; 636900d495aSAlexey Orishko 637900d495aSAlexey Orishko for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 638900d495aSAlexey Orishko 639900d495aSAlexey Orishko e = intf->cur_altsetting->endpoint + ep; 640900d495aSAlexey Orishko switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 641900d495aSAlexey Orishko case USB_ENDPOINT_XFER_INT: 642900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 643ff1632aaSBjørn Mork if (!dev->status) 644ff1632aaSBjørn Mork dev->status = e; 645900d495aSAlexey Orishko } 646900d495aSAlexey Orishko break; 647900d495aSAlexey Orishko 648900d495aSAlexey Orishko case USB_ENDPOINT_XFER_BULK: 649900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 650ff1632aaSBjørn Mork if (!in) 651ff1632aaSBjørn Mork in = e; 652900d495aSAlexey Orishko } else { 653ff1632aaSBjørn Mork if (!out) 654ff1632aaSBjørn Mork out = e; 655900d495aSAlexey Orishko } 656900d495aSAlexey Orishko break; 657900d495aSAlexey Orishko 658900d495aSAlexey Orishko default: 659900d495aSAlexey Orishko break; 660900d495aSAlexey Orishko } 661900d495aSAlexey Orishko } 662ff1632aaSBjørn Mork if (in && !dev->in) 663ff1632aaSBjørn Mork dev->in = usb_rcvbulkpipe(dev->udev, 664ff1632aaSBjørn Mork in->desc.bEndpointAddress & 665ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 666ff1632aaSBjørn Mork if (out && !dev->out) 667ff1632aaSBjørn Mork dev->out = usb_sndbulkpipe(dev->udev, 668ff1632aaSBjørn Mork out->desc.bEndpointAddress & 669ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 670900d495aSAlexey Orishko } 671900d495aSAlexey Orishko 672900d495aSAlexey Orishko static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 673900d495aSAlexey Orishko { 674900d495aSAlexey Orishko if (ctx == NULL) 675900d495aSAlexey Orishko return; 676900d495aSAlexey Orishko 677900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 678900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 679900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 680900d495aSAlexey Orishko } 681900d495aSAlexey Orishko 682900d495aSAlexey Orishko if (ctx->tx_curr_skb != NULL) { 683900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_curr_skb); 684900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 685900d495aSAlexey Orishko } 686900d495aSAlexey Orishko 6874a0e3e98SEnrico Mioso kfree(ctx->delayed_ndp16); 6884a0e3e98SEnrico Mioso 689900d495aSAlexey Orishko kfree(ctx); 690900d495aSAlexey Orishko } 691900d495aSAlexey Orishko 6924a0e3e98SEnrico Mioso int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) 693900d495aSAlexey Orishko { 69483292236SBjørn Mork const struct usb_cdc_union_desc *union_desc = NULL; 695900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 696900d495aSAlexey Orishko struct usb_driver *driver; 697900d495aSAlexey Orishko u8 *buf; 698900d495aSAlexey Orishko int len; 699900d495aSAlexey Orishko int temp; 700900d495aSAlexey Orishko u8 iface_no; 70177b0a099SOliver Neukum struct usb_cdc_parsed_header hdr; 702900d495aSAlexey Orishko 703c796984fSThomas Meyer ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 7048f0923c1SDevendra Naga if (!ctx) 7058f0923c1SDevendra Naga return -ENOMEM; 706900d495aSAlexey Orishko 707c84ff1d6SAlexey Orishko hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 708c84ff1d6SAlexey Orishko ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 709bed6f762SBjørn Mork ctx->bh.data = (unsigned long)dev; 710c84ff1d6SAlexey Orishko ctx->bh.func = cdc_ncm_txpath_bh; 711c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 0); 712900d495aSAlexey Orishko spin_lock_init(&ctx->mtx); 713900d495aSAlexey Orishko 714900d495aSAlexey Orishko /* store ctx pointer in device data field */ 715900d495aSAlexey Orishko dev->data[0] = (unsigned long)ctx; 716900d495aSAlexey Orishko 7179fe0234cSBjørn Mork /* only the control interface can be successfully probed */ 7189fe0234cSBjørn Mork ctx->control = intf; 7199fe0234cSBjørn Mork 720900d495aSAlexey Orishko /* get some pointers */ 721900d495aSAlexey Orishko driver = driver_of(intf); 722900d495aSAlexey Orishko buf = intf->cur_altsetting->extra; 723900d495aSAlexey Orishko len = intf->cur_altsetting->extralen; 724900d495aSAlexey Orishko 725900d495aSAlexey Orishko /* parse through descriptors associated with control interface */ 72677b0a099SOliver Neukum cdc_parse_cdc_header(&hdr, intf, buf, len); 727900d495aSAlexey Orishko 728900d495aSAlexey Orishko ctx->data = usb_ifnum_to_if(dev->udev, 72977b0a099SOliver Neukum hdr.usb_cdc_union_desc->bSlaveInterface0); 73077b0a099SOliver Neukum ctx->ether_desc = hdr.usb_cdc_ether_desc; 73177b0a099SOliver Neukum ctx->func_desc = hdr.usb_cdc_ncm_desc; 73277b0a099SOliver Neukum ctx->mbim_desc = hdr.usb_cdc_mbim_desc; 73377b0a099SOliver Neukum ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; 734900d495aSAlexey Orishko 7359992c2e2SBjørn Mork /* some buggy devices have an IAD but no CDC Union */ 73683292236SBjørn Mork if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 73756a666dcSBjørn Mork ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 73856a666dcSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 7399992c2e2SBjørn Mork } 7409992c2e2SBjørn Mork 741900d495aSAlexey Orishko /* check if we got everything */ 742f8afb73dSBjørn Mork if (!ctx->data) { 743f8afb73dSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); 744900d495aSAlexey Orishko goto error; 745296e81f8SBjørn Mork } 746f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { 747f8afb73dSBjørn Mork if (!ctx->mbim_desc) { 748f8afb73dSBjørn Mork dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); 749f8afb73dSBjørn Mork goto error; 750f8afb73dSBjørn Mork } 751f8afb73dSBjørn Mork } else { 752f8afb73dSBjørn Mork if (!ctx->ether_desc || !ctx->func_desc) { 753f8afb73dSBjørn Mork dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); 754f8afb73dSBjørn Mork goto error; 755f8afb73dSBjørn Mork } 756f8afb73dSBjørn Mork } 757900d495aSAlexey Orishko 758bbc8d922SBjørn Mork /* claim data interface, if different from control */ 759bbc8d922SBjørn Mork if (ctx->data != ctx->control) { 760900d495aSAlexey Orishko temp = usb_driver_claim_interface(driver, ctx->data, dev); 761296e81f8SBjørn Mork if (temp) { 762296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to claim data intf\n"); 763900d495aSAlexey Orishko goto error; 764bbc8d922SBjørn Mork } 765296e81f8SBjørn Mork } 766900d495aSAlexey Orishko 767900d495aSAlexey Orishko iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 768900d495aSAlexey Orishko 769900d495aSAlexey Orishko /* reset data interface */ 770900d495aSAlexey Orishko temp = usb_set_interface(dev->udev, iface_no, 0); 771296e81f8SBjørn Mork if (temp) { 772296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 77319694ac8SAlexey Orishko goto error2; 774296e81f8SBjørn Mork } 775900d495aSAlexey Orishko 77608c74fc9SBjørn Mork /* initialize basic device settings */ 77708c74fc9SBjørn Mork if (cdc_ncm_init(dev)) 778ff0992e9SBjørn Mork goto error2; 779ff0992e9SBjørn Mork 780900d495aSAlexey Orishko /* configure data interface */ 78138396e4cSGreg Suarez temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 782296e81f8SBjørn Mork if (temp) { 783296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 78419694ac8SAlexey Orishko goto error2; 785296e81f8SBjørn Mork } 786900d495aSAlexey Orishko 787ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->data); 788ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->control); 789296e81f8SBjørn Mork if (!dev->in || !dev->out || !dev->status) { 790296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to collect endpoints\n"); 79119694ac8SAlexey Orishko goto error2; 792296e81f8SBjørn Mork } 793900d495aSAlexey Orishko 794900d495aSAlexey Orishko usb_set_intfdata(ctx->data, dev); 795900d495aSAlexey Orishko usb_set_intfdata(ctx->control, dev); 796900d495aSAlexey Orishko 79738396e4cSGreg Suarez if (ctx->ether_desc) { 798900d495aSAlexey Orishko temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 799296e81f8SBjørn Mork if (temp) { 800296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to get mac address\n"); 80119694ac8SAlexey Orishko goto error2; 802296e81f8SBjørn Mork } 803296e81f8SBjørn Mork dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 80438396e4cSGreg Suarez } 80538396e4cSGreg Suarez 80608c74fc9SBjørn Mork /* finish setting up the device specific data */ 80708c74fc9SBjørn Mork cdc_ncm_setup(dev); 808ff0992e9SBjørn Mork 8094a0e3e98SEnrico Mioso /* Device-specific flags */ 8104a0e3e98SEnrico Mioso ctx->drvflags = drvflags; 8114a0e3e98SEnrico Mioso 8124a0e3e98SEnrico Mioso /* Allocate the delayed NDP if needed. */ 8134a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 8144a0e3e98SEnrico Mioso ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 8154a0e3e98SEnrico Mioso if (!ctx->delayed_ndp16) 8164a0e3e98SEnrico Mioso goto error2; 8174a0e3e98SEnrico Mioso dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 8184a0e3e98SEnrico Mioso } 8194a0e3e98SEnrico Mioso 8206c4e548fSBjørn Mork /* override ethtool_ops */ 8216c4e548fSBjørn Mork dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 8226c4e548fSBjørn Mork 823289507d3SBjørn Mork /* add our sysfs attrs */ 824289507d3SBjørn Mork dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 825289507d3SBjørn Mork 826900d495aSAlexey Orishko return 0; 827900d495aSAlexey Orishko 82819694ac8SAlexey Orishko error2: 82919694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 83019694ac8SAlexey Orishko usb_set_intfdata(ctx->data, NULL); 8316b4ef602SBjørn Mork if (ctx->data != ctx->control) 83219694ac8SAlexey Orishko usb_driver_release_interface(driver, ctx->data); 833900d495aSAlexey Orishko error: 834900d495aSAlexey Orishko cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 835900d495aSAlexey Orishko dev->data[0] = 0; 836296e81f8SBjørn Mork dev_info(&intf->dev, "bind() failure\n"); 837900d495aSAlexey Orishko return -ENODEV; 838900d495aSAlexey Orishko } 839c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 840900d495aSAlexey Orishko 841c91ce3b6SBjørn Mork void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 842900d495aSAlexey Orishko { 843900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 84419694ac8SAlexey Orishko struct usb_driver *driver = driver_of(intf); 845900d495aSAlexey Orishko 846900d495aSAlexey Orishko if (ctx == NULL) 847900d495aSAlexey Orishko return; /* no setup */ 848900d495aSAlexey Orishko 849c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 1); 850c84ff1d6SAlexey Orishko 851c84ff1d6SAlexey Orishko if (hrtimer_active(&ctx->tx_timer)) 852c84ff1d6SAlexey Orishko hrtimer_cancel(&ctx->tx_timer); 853c84ff1d6SAlexey Orishko 854c84ff1d6SAlexey Orishko tasklet_kill(&ctx->bh); 855c84ff1d6SAlexey Orishko 856bbc8d922SBjørn Mork /* handle devices with combined control and data interface */ 857bbc8d922SBjørn Mork if (ctx->control == ctx->data) 858bbc8d922SBjørn Mork ctx->data = NULL; 859bbc8d922SBjørn Mork 86019694ac8SAlexey Orishko /* disconnect master --> disconnect slave */ 86119694ac8SAlexey Orishko if (intf == ctx->control && ctx->data) { 862900d495aSAlexey Orishko usb_set_intfdata(ctx->data, NULL); 863900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->data); 86419694ac8SAlexey Orishko ctx->data = NULL; 865900d495aSAlexey Orishko 86619694ac8SAlexey Orishko } else if (intf == ctx->data && ctx->control) { 86719694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 868900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->control); 86919694ac8SAlexey Orishko ctx->control = NULL; 870900d495aSAlexey Orishko } 871900d495aSAlexey Orishko 8723e515665SBjørn Mork usb_set_intfdata(intf, NULL); 873900d495aSAlexey Orishko cdc_ncm_free(ctx); 874900d495aSAlexey Orishko } 875c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 876900d495aSAlexey Orishko 87750a0ffafSBjørn Mork /* Return the number of the MBIM control interface altsetting iff it 87850a0ffafSBjørn Mork * is preferred and available, 8791e8bbe6cSBjørn Mork */ 88050a0ffafSBjørn Mork u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 88138396e4cSGreg Suarez { 8821e8bbe6cSBjørn Mork struct usb_host_interface *alt; 88338396e4cSGreg Suarez 884bd329e12SBjørn Mork /* The MBIM spec defines a NCM compatible default altsetting, 885bd329e12SBjørn Mork * which we may have matched: 886bd329e12SBjørn Mork * 887bd329e12SBjørn Mork * "Functions that implement both NCM 1.0 and MBIM (an 888bd329e12SBjørn Mork * “NCM/MBIM function”) according to this recommendation 889bd329e12SBjørn Mork * shall provide two alternate settings for the 890bd329e12SBjørn Mork * Communication Interface. Alternate setting 0, and the 891bd329e12SBjørn Mork * associated class and endpoint descriptors, shall be 892bd329e12SBjørn Mork * constructed according to the rules given for the 893bd329e12SBjørn Mork * Communication Interface in section 5 of [USBNCM10]. 894bd329e12SBjørn Mork * Alternate setting 1, and the associated class and 895bd329e12SBjørn Mork * endpoint descriptors, shall be constructed according to 896bd329e12SBjørn Mork * the rules given in section 6 (USB Device Model) of this 897bd329e12SBjørn Mork * specification." 898bd329e12SBjørn Mork */ 89950a0ffafSBjørn Mork if (intf->num_altsetting < 2) 90050a0ffafSBjørn Mork return intf->cur_altsetting->desc.bAlternateSetting; 90150a0ffafSBjørn Mork 90250a0ffafSBjørn Mork if (prefer_mbim) { 9031e8bbe6cSBjørn Mork alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 90450a0ffafSBjørn Mork if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 90550a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_MBIM; 9061e8bbe6cSBjørn Mork } 90750a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_NCM; 9081e8bbe6cSBjørn Mork } 9091e8bbe6cSBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 9101e8bbe6cSBjørn Mork 9111e8bbe6cSBjørn Mork static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 9121e8bbe6cSBjørn Mork { 9131e8bbe6cSBjørn Mork int ret; 9141e8bbe6cSBjørn Mork 9151e8bbe6cSBjørn Mork /* MBIM backwards compatible function? */ 91650a0ffafSBjørn Mork if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 917bd329e12SBjørn Mork return -ENODEV; 918bd329e12SBjørn Mork 9194a0e3e98SEnrico Mioso /* The NCM data altsetting is fixed, so we hard-coded it. 9204a0e3e98SEnrico Mioso * Additionally, generic NCM devices are assumed to accept arbitrarily 9214a0e3e98SEnrico Mioso * placed NDP. 9224a0e3e98SEnrico Mioso */ 9234a0e3e98SEnrico Mioso ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 92438396e4cSGreg Suarez 92538396e4cSGreg Suarez /* 92638396e4cSGreg Suarez * We should get an event when network connection is "connected" or 92738396e4cSGreg Suarez * "disconnected". Set network connection in "disconnected" state 92838396e4cSGreg Suarez * (carrier is OFF) during attach, so the IP network stack does not 92938396e4cSGreg Suarez * start IPv6 negotiation and more. 93038396e4cSGreg Suarez */ 9318a34b0aeSMing Lei usbnet_link_change(dev, 0, 0); 93238396e4cSGreg Suarez return ret; 93338396e4cSGreg Suarez } 93438396e4cSGreg Suarez 935c78b7c58SBjørn Mork static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 936900d495aSAlexey Orishko { 937c78b7c58SBjørn Mork size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 938c78b7c58SBjørn Mork 939c78b7c58SBjørn Mork if (skb->len + align > max) 940c78b7c58SBjørn Mork align = max - skb->len; 941c78b7c58SBjørn Mork if (align && skb_tailroom(skb) >= align) 942c78b7c58SBjørn Mork memset(skb_put(skb, align), 0, align); 943c78b7c58SBjørn Mork } 944c78b7c58SBjørn Mork 945c78b7c58SBjørn Mork /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 946c78b7c58SBjørn Mork * allocating a new one within skb 947c78b7c58SBjørn Mork */ 948c78b7c58SBjørn Mork static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 949c78b7c58SBjørn Mork { 950c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 951c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 952c78b7c58SBjørn Mork size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 953c78b7c58SBjørn Mork 9544a0e3e98SEnrico Mioso /* If NDP should be moved to the end of the NCM package, we can't follow the 9554a0e3e98SEnrico Mioso * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 9564a0e3e98SEnrico Mioso * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 9574a0e3e98SEnrico Mioso */ 9584a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 9594a0e3e98SEnrico Mioso if (ctx->delayed_ndp16->dwSignature == sign) 9604a0e3e98SEnrico Mioso return ctx->delayed_ndp16; 9614a0e3e98SEnrico Mioso 962c78b7c58SBjørn Mork /* follow the chain of NDPs, looking for a match */ 963c78b7c58SBjørn Mork while (ndpoffset) { 964c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 965c78b7c58SBjørn Mork if (ndp16->dwSignature == sign) 966c78b7c58SBjørn Mork return ndp16; 967c78b7c58SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 968c78b7c58SBjørn Mork } 969c78b7c58SBjørn Mork 970c78b7c58SBjørn Mork /* align new NDP */ 9714a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 972c78b7c58SBjørn Mork cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 973c78b7c58SBjørn Mork 974c78b7c58SBjørn Mork /* verify that there is room for the NDP and the datagram (reserve) */ 97570559b89SBjørn Mork if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) 976c78b7c58SBjørn Mork return NULL; 977c78b7c58SBjørn Mork 978c78b7c58SBjørn Mork /* link to it */ 979c78b7c58SBjørn Mork if (ndp16) 980c78b7c58SBjørn Mork ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 981c78b7c58SBjørn Mork else 982c78b7c58SBjørn Mork nth16->wNdpIndex = cpu_to_le16(skb->len); 983c78b7c58SBjørn Mork 984c78b7c58SBjørn Mork /* push a new empty NDP */ 9854a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 98670559b89SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); 9874a0e3e98SEnrico Mioso else 9884a0e3e98SEnrico Mioso ndp16 = ctx->delayed_ndp16; 9894a0e3e98SEnrico Mioso 990c78b7c58SBjørn Mork ndp16->dwSignature = sign; 991c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 992c78b7c58SBjørn Mork return ndp16; 993900d495aSAlexey Orishko } 994900d495aSAlexey Orishko 995c91ce3b6SBjørn Mork struct sk_buff * 996bed6f762SBjørn Mork cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 997900d495aSAlexey Orishko { 998bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 999c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16; 1000c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1001900d495aSAlexey Orishko struct sk_buff *skb_out; 1002c78b7c58SBjørn Mork u16 n = 0, index, ndplen; 100384e77a8bSAlexey Orishko u8 ready2send = 0; 10044a0e3e98SEnrico Mioso u32 delayed_ndp_size; 10054a0e3e98SEnrico Mioso 10064a0e3e98SEnrico Mioso /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 10074a0e3e98SEnrico Mioso * accordingly. Otherwise, we should check here. 10084a0e3e98SEnrico Mioso */ 10094a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 10104a0e3e98SEnrico Mioso delayed_ndp_size = ctx->max_ndp_size; 10114a0e3e98SEnrico Mioso else 10124a0e3e98SEnrico Mioso delayed_ndp_size = 0; 1013900d495aSAlexey Orishko 1014900d495aSAlexey Orishko /* if there is a remaining skb, it gets priority */ 1015c78b7c58SBjørn Mork if (skb != NULL) { 1016900d495aSAlexey Orishko swap(skb, ctx->tx_rem_skb); 1017c78b7c58SBjørn Mork swap(sign, ctx->tx_rem_sign); 1018c78b7c58SBjørn Mork } else { 101984e77a8bSAlexey Orishko ready2send = 1; 1020c78b7c58SBjørn Mork } 1021900d495aSAlexey Orishko 1022900d495aSAlexey Orishko /* check if we are resuming an OUT skb */ 1023900d495aSAlexey Orishko skb_out = ctx->tx_curr_skb; 1024900d495aSAlexey Orishko 1025c78b7c58SBjørn Mork /* allocate a new OUT skb */ 1026c78b7c58SBjørn Mork if (!skb_out) { 102720572226SBjørn Mork skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 1028900d495aSAlexey Orishko if (skb_out == NULL) { 1029900d495aSAlexey Orishko if (skb != NULL) { 1030900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1031bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1032900d495aSAlexey Orishko } 1033900d495aSAlexey Orishko goto exit_no_skb; 1034900d495aSAlexey Orishko } 1035c78b7c58SBjørn Mork /* fill out the initial 16-bit NTB header */ 1036c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); 1037c78b7c58SBjørn Mork nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 1038c78b7c58SBjørn Mork nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 1039c78b7c58SBjørn Mork nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 1040900d495aSAlexey Orishko 1041c78b7c58SBjørn Mork /* count total number of frames in this NTB */ 1042900d495aSAlexey Orishko ctx->tx_curr_frame_num = 0; 1043beeecd42SBjørn Mork 1044beeecd42SBjørn Mork /* recent payload counter for this skb_out */ 1045beeecd42SBjørn Mork ctx->tx_curr_frame_payload = 0; 1046900d495aSAlexey Orishko } 1047900d495aSAlexey Orishko 1048c78b7c58SBjørn Mork for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1049c78b7c58SBjørn Mork /* send any remaining skb first */ 1050900d495aSAlexey Orishko if (skb == NULL) { 1051900d495aSAlexey Orishko skb = ctx->tx_rem_skb; 1052c78b7c58SBjørn Mork sign = ctx->tx_rem_sign; 1053900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 1054900d495aSAlexey Orishko 1055900d495aSAlexey Orishko /* check for end of skb */ 1056900d495aSAlexey Orishko if (skb == NULL) 1057900d495aSAlexey Orishko break; 1058900d495aSAlexey Orishko } 1059900d495aSAlexey Orishko 1060c78b7c58SBjørn Mork /* get the appropriate NDP for this skb */ 1061c78b7c58SBjørn Mork ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1062c78b7c58SBjørn Mork 1063c78b7c58SBjørn Mork /* align beginning of next frame */ 1064c78b7c58SBjørn Mork cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 1065c78b7c58SBjørn Mork 1066c78b7c58SBjørn Mork /* check if we had enough room left for both NDP and frame */ 10674a0e3e98SEnrico Mioso if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { 1068900d495aSAlexey Orishko if (n == 0) { 1069900d495aSAlexey Orishko /* won't fit, MTU problem? */ 1070900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1071900d495aSAlexey Orishko skb = NULL; 1072bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1073900d495aSAlexey Orishko } else { 1074900d495aSAlexey Orishko /* no room for skb - store for later */ 1075900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 1076900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 1077bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1078900d495aSAlexey Orishko } 1079900d495aSAlexey Orishko ctx->tx_rem_skb = skb; 1080c78b7c58SBjørn Mork ctx->tx_rem_sign = sign; 1081900d495aSAlexey Orishko skb = NULL; 108284e77a8bSAlexey Orishko ready2send = 1; 1083beeecd42SBjørn Mork ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1084900d495aSAlexey Orishko } 1085900d495aSAlexey Orishko break; 1086900d495aSAlexey Orishko } 1087900d495aSAlexey Orishko 1088c78b7c58SBjørn Mork /* calculate frame number withing this NDP */ 1089c78b7c58SBjørn Mork ndplen = le16_to_cpu(ndp16->wLength); 1090c78b7c58SBjørn Mork index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1091900d495aSAlexey Orishko 1092c78b7c58SBjørn Mork /* OK, add this skb */ 1093c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 1094c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 1095c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 1096c78b7c58SBjørn Mork memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); 1097beeecd42SBjørn Mork ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1098900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1099900d495aSAlexey Orishko skb = NULL; 1100c78b7c58SBjørn Mork 1101c78b7c58SBjørn Mork /* send now if this NDP is full */ 1102c78b7c58SBjørn Mork if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1103c78b7c58SBjørn Mork ready2send = 1; 1104beeecd42SBjørn Mork ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1105c78b7c58SBjørn Mork break; 1106c78b7c58SBjørn Mork } 1107900d495aSAlexey Orishko } 1108900d495aSAlexey Orishko 1109900d495aSAlexey Orishko /* free up any dangling skb */ 1110900d495aSAlexey Orishko if (skb != NULL) { 1111900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1112900d495aSAlexey Orishko skb = NULL; 1113bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1114900d495aSAlexey Orishko } 1115900d495aSAlexey Orishko 1116900d495aSAlexey Orishko ctx->tx_curr_frame_num = n; 1117900d495aSAlexey Orishko 1118900d495aSAlexey Orishko if (n == 0) { 1119900d495aSAlexey Orishko /* wait for more frames */ 1120900d495aSAlexey Orishko /* push variables */ 1121900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1122900d495aSAlexey Orishko goto exit_no_skb; 1123900d495aSAlexey Orishko 11246c4e548fSBjørn Mork } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1125900d495aSAlexey Orishko /* wait for more frames */ 1126900d495aSAlexey Orishko /* push variables */ 1127900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1128900d495aSAlexey Orishko /* set the pending count */ 1129900d495aSAlexey Orishko if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1130c84ff1d6SAlexey Orishko ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1131900d495aSAlexey Orishko goto exit_no_skb; 1132900d495aSAlexey Orishko 1133900d495aSAlexey Orishko } else { 1134beeecd42SBjørn Mork if (n == ctx->tx_max_datagrams) 1135beeecd42SBjørn Mork ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1136900d495aSAlexey Orishko /* frame goes out */ 1137900d495aSAlexey Orishko /* variables will be reset at next call */ 1138900d495aSAlexey Orishko } 1139900d495aSAlexey Orishko 11404a0e3e98SEnrico Mioso /* If requested, put NDP at end of frame. */ 11414a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 11424a0e3e98SEnrico Mioso nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 11434a0e3e98SEnrico Mioso cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); 11444a0e3e98SEnrico Mioso nth16->wNdpIndex = cpu_to_le16(skb_out->len); 11454a0e3e98SEnrico Mioso memcpy(skb_put(skb_out, ctx->max_ndp_size), ctx->delayed_ndp16, ctx->max_ndp_size); 11464a0e3e98SEnrico Mioso 11474a0e3e98SEnrico Mioso /* Zero out delayed NDP - signature checking will naturally fail. */ 11484a0e3e98SEnrico Mioso ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 11494a0e3e98SEnrico Mioso } 11504a0e3e98SEnrico Mioso 115143e4c6dfSBjørn Mork /* If collected data size is less or equal ctx->min_tx_pkt 115220572226SBjørn Mork * bytes, we send buffers as it is. If we get more data, it 115320572226SBjørn Mork * would be more efficient for USB HS mobile device with DMA 115420572226SBjørn Mork * engine to receive a full size NTB, than canceling DMA 115520572226SBjørn Mork * transfer and receiving a short packet. 11564d619f62SBjørn Mork * 11574d619f62SBjørn Mork * This optimization support is pointless if we end up sending 11584d619f62SBjørn Mork * a ZLP after full sized NTBs. 1159900d495aSAlexey Orishko */ 11604d619f62SBjørn Mork if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 116143e4c6dfSBjørn Mork skb_out->len > ctx->min_tx_pkt) 116220572226SBjørn Mork memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, 116320572226SBjørn Mork ctx->tx_max - skb_out->len); 11649becd707SBjørn Mork else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) 1165c78b7c58SBjørn Mork *skb_put(skb_out, 1) = 0; /* force short packet */ 1166900d495aSAlexey Orishko 1167c78b7c58SBjørn Mork /* set final frame length */ 1168c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1169c78b7c58SBjørn Mork nth16->wBlockLength = cpu_to_le16(skb_out->len); 1170900d495aSAlexey Orishko 1171900d495aSAlexey Orishko /* return skb */ 1172900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 1173beeecd42SBjørn Mork 1174beeecd42SBjørn Mork /* keep private stats: framing overhead and number of NTBs */ 1175beeecd42SBjørn Mork ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1176beeecd42SBjørn Mork ctx->tx_ntbs++; 1177beeecd42SBjørn Mork 11787a1e890eSBen Hutchings /* usbnet will count all the framing overhead by default. 1179beeecd42SBjørn Mork * Adjust the stats so that the tx_bytes counter show real 1180beeecd42SBjørn Mork * payload data instead. 1181beeecd42SBjørn Mork */ 11827a1e890eSBen Hutchings usbnet_set_skb_tx_stats(skb_out, n, 118344f6731dSBjørn Mork (long)ctx->tx_curr_frame_payload - skb_out->len); 11841e9e39f4SBen Hutchings 1185900d495aSAlexey Orishko return skb_out; 1186900d495aSAlexey Orishko 1187900d495aSAlexey Orishko exit_no_skb: 1188046c6594SBjørn Mork /* Start timer, if there is a remaining non-empty skb */ 1189046c6594SBjørn Mork if (ctx->tx_curr_skb != NULL && n > 0) 1190c84ff1d6SAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1191900d495aSAlexey Orishko return NULL; 1192900d495aSAlexey Orishko } 1193c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1194900d495aSAlexey Orishko 1195900d495aSAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1196900d495aSAlexey Orishko { 1197900d495aSAlexey Orishko /* start timer, if not already started */ 1198c84ff1d6SAlexey Orishko if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1199c84ff1d6SAlexey Orishko hrtimer_start(&ctx->tx_timer, 12006c4e548fSBjørn Mork ktime_set(0, ctx->timer_interval), 1201c84ff1d6SAlexey Orishko HRTIMER_MODE_REL); 1202900d495aSAlexey Orishko } 1203900d495aSAlexey Orishko 1204c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1205900d495aSAlexey Orishko { 1206c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = 1207c84ff1d6SAlexey Orishko container_of(timer, struct cdc_ncm_ctx, tx_timer); 1208900d495aSAlexey Orishko 1209c84ff1d6SAlexey Orishko if (!atomic_read(&ctx->stop)) 1210c84ff1d6SAlexey Orishko tasklet_schedule(&ctx->bh); 1211c84ff1d6SAlexey Orishko return HRTIMER_NORESTART; 1212c84ff1d6SAlexey Orishko } 1213c84ff1d6SAlexey Orishko 1214c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param) 1215c84ff1d6SAlexey Orishko { 1216bed6f762SBjørn Mork struct usbnet *dev = (struct usbnet *)param; 1217bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1218c84ff1d6SAlexey Orishko 1219c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 1220900d495aSAlexey Orishko if (ctx->tx_timer_pending != 0) { 1221900d495aSAlexey Orishko ctx->tx_timer_pending--; 1222900d495aSAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1223c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1224bed6f762SBjørn Mork } else if (dev->net != NULL) { 1225beeecd42SBjørn Mork ctx->tx_reason_timeout++; /* count reason for transmitting */ 1226c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1227bed6f762SBjørn Mork netif_tx_lock_bh(dev->net); 1228bed6f762SBjørn Mork usbnet_start_xmit(NULL, dev->net); 1229bed6f762SBjørn Mork netif_tx_unlock_bh(dev->net); 12307b1e0cbaSBjørn Mork } else { 12317b1e0cbaSBjørn Mork spin_unlock_bh(&ctx->mtx); 1232900d495aSAlexey Orishko } 1233f742aa8aSAlexey Orishko } 1234900d495aSAlexey Orishko 12352f69702cSEnrico Mioso struct sk_buff * 1236900d495aSAlexey Orishko cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1237900d495aSAlexey Orishko { 1238900d495aSAlexey Orishko struct sk_buff *skb_out; 1239900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1240900d495aSAlexey Orishko 1241900d495aSAlexey Orishko /* 1242900d495aSAlexey Orishko * The Ethernet API we are using does not support transmitting 1243900d495aSAlexey Orishko * multiple Ethernet frames in a single call. This driver will 1244900d495aSAlexey Orishko * accumulate multiple Ethernet frames and send out a larger 1245900d495aSAlexey Orishko * USB frame when the USB buffer is full or when a single jiffies 1246900d495aSAlexey Orishko * timeout happens. 1247900d495aSAlexey Orishko */ 1248900d495aSAlexey Orishko if (ctx == NULL) 1249900d495aSAlexey Orishko goto error; 1250900d495aSAlexey Orishko 1251c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 1252bed6f762SBjørn Mork skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 1253c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1254900d495aSAlexey Orishko return skb_out; 1255900d495aSAlexey Orishko 1256900d495aSAlexey Orishko error: 1257900d495aSAlexey Orishko if (skb != NULL) 1258900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1259900d495aSAlexey Orishko 1260900d495aSAlexey Orishko return NULL; 1261900d495aSAlexey Orishko } 12622f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1263900d495aSAlexey Orishko 1264ff06ab13SBjørn Mork /* verify NTB header and return offset of first NDP, or negative error */ 1265c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1266900d495aSAlexey Orishko { 1267ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1268d5ddb4a5SAlexey Orishko struct usb_cdc_ncm_nth16 *nth16; 1269ff06ab13SBjørn Mork int len; 1270ff06ab13SBjørn Mork int ret = -EINVAL; 1271900d495aSAlexey Orishko 1272900d495aSAlexey Orishko if (ctx == NULL) 1273900d495aSAlexey Orishko goto error; 1274900d495aSAlexey Orishko 1275d5ddb4a5SAlexey Orishko if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1276d5ddb4a5SAlexey Orishko sizeof(struct usb_cdc_ncm_ndp16))) { 1277ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1278900d495aSAlexey Orishko goto error; 1279900d495aSAlexey Orishko } 1280900d495aSAlexey Orishko 1281d5ddb4a5SAlexey Orishko nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1282900d495aSAlexey Orishko 1283986e10d6SBjørn Mork if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 12845448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 12855448d75fSBjørn Mork "invalid NTH16 signature <%#010x>\n", 1286d5ddb4a5SAlexey Orishko le32_to_cpu(nth16->dwSignature)); 1287900d495aSAlexey Orishko goto error; 1288900d495aSAlexey Orishko } 1289900d495aSAlexey Orishko 1290d5ddb4a5SAlexey Orishko len = le16_to_cpu(nth16->wBlockLength); 1291d5ddb4a5SAlexey Orishko if (len > ctx->rx_max) { 1292ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1293ae223cd4SBjørn Mork "unsupported NTB block length %u/%u\n", len, 1294d5ddb4a5SAlexey Orishko ctx->rx_max); 1295900d495aSAlexey Orishko goto error; 1296900d495aSAlexey Orishko } 1297900d495aSAlexey Orishko 1298d5ddb4a5SAlexey Orishko if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1299d5ddb4a5SAlexey Orishko (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1300d5ddb4a5SAlexey Orishko !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1301ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1302ae223cd4SBjørn Mork "sequence number glitch prev=%d curr=%d\n", 1303d5ddb4a5SAlexey Orishko ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1304d5ddb4a5SAlexey Orishko } 1305d5ddb4a5SAlexey Orishko ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1306d5ddb4a5SAlexey Orishko 1307ff06ab13SBjørn Mork ret = le16_to_cpu(nth16->wNdpIndex); 1308ff06ab13SBjørn Mork error: 1309ff06ab13SBjørn Mork return ret; 1310ff06ab13SBjørn Mork } 1311c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1312ff06ab13SBjørn Mork 1313ff06ab13SBjørn Mork /* verify NDP header and return number of datagrams, or negative error */ 1314c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1315ff06ab13SBjørn Mork { 1316ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1317ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1318ff06ab13SBjørn Mork int ret = -EINVAL; 1319ff06ab13SBjørn Mork 132075d67d35SBjørn Mork if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1321ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1322ae223cd4SBjørn Mork ndpoffset); 1323900d495aSAlexey Orishko goto error; 1324900d495aSAlexey Orishko } 132575d67d35SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1326900d495aSAlexey Orishko 1327ff06ab13SBjørn Mork if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1328ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1329a26fd05dSBjørn Mork le16_to_cpu(ndp16->wLength)); 1330ff06ab13SBjørn Mork goto error; 1331ff06ab13SBjørn Mork } 1332ff06ab13SBjørn Mork 1333ff06ab13SBjørn Mork ret = ((le16_to_cpu(ndp16->wLength) - 1334ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_ndp16)) / 1335ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_dpe16)); 1336ff06ab13SBjørn Mork ret--; /* we process NDP entries except for the last one */ 1337ff06ab13SBjørn Mork 1338ae223cd4SBjørn Mork if ((sizeof(struct usb_cdc_ncm_ndp16) + 1339ae223cd4SBjørn Mork ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1340ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1341ff06ab13SBjørn Mork ret = -EINVAL; 1342ff06ab13SBjørn Mork } 1343ff06ab13SBjørn Mork 1344ff06ab13SBjørn Mork error: 1345ff06ab13SBjørn Mork return ret; 1346ff06ab13SBjørn Mork } 1347c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1348ff06ab13SBjørn Mork 13492f69702cSEnrico Mioso int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1350ff06ab13SBjørn Mork { 1351ff06ab13SBjørn Mork struct sk_buff *skb; 1352ff06ab13SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1353ff06ab13SBjørn Mork int len; 1354ff06ab13SBjørn Mork int nframes; 1355ff06ab13SBjørn Mork int x; 1356ff06ab13SBjørn Mork int offset; 1357ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1358ff06ab13SBjørn Mork struct usb_cdc_ncm_dpe16 *dpe16; 1359ff06ab13SBjørn Mork int ndpoffset; 1360ff06ab13SBjørn Mork int loopcount = 50; /* arbitrary max preventing infinite loop */ 1361beeecd42SBjørn Mork u32 payload = 0; 1362ff06ab13SBjørn Mork 1363ff06ab13SBjørn Mork ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 1364ff06ab13SBjørn Mork if (ndpoffset < 0) 1365ff06ab13SBjørn Mork goto error; 1366ff06ab13SBjørn Mork 1367ff06ab13SBjørn Mork next_ndp: 1368ff06ab13SBjørn Mork nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1369ff06ab13SBjørn Mork if (nframes < 0) 1370ff06ab13SBjørn Mork goto error; 1371ff06ab13SBjørn Mork 1372ff06ab13SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1373ff06ab13SBjørn Mork 1374986e10d6SBjørn Mork if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 13755448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 13765448d75fSBjørn Mork "invalid DPT16 signature <%#010x>\n", 1377d5ddb4a5SAlexey Orishko le32_to_cpu(ndp16->dwSignature)); 137875d67d35SBjørn Mork goto err_ndp; 1379900d495aSAlexey Orishko } 1380ff06ab13SBjørn Mork dpe16 = ndp16->dpe16; 1381900d495aSAlexey Orishko 1382d5ddb4a5SAlexey Orishko for (x = 0; x < nframes; x++, dpe16++) { 1383d5ddb4a5SAlexey Orishko offset = le16_to_cpu(dpe16->wDatagramIndex); 1384d5ddb4a5SAlexey Orishko len = le16_to_cpu(dpe16->wDatagramLength); 1385900d495aSAlexey Orishko 1386900d495aSAlexey Orishko /* 1387900d495aSAlexey Orishko * CDC NCM ch. 3.7 1388900d495aSAlexey Orishko * All entries after first NULL entry are to be ignored 1389900d495aSAlexey Orishko */ 1390d5ddb4a5SAlexey Orishko if ((offset == 0) || (len == 0)) { 1391900d495aSAlexey Orishko if (!x) 139275d67d35SBjørn Mork goto err_ndp; /* empty NTB */ 1393900d495aSAlexey Orishko break; 1394900d495aSAlexey Orishko } 1395900d495aSAlexey Orishko 1396900d495aSAlexey Orishko /* sanity checking */ 1397d5ddb4a5SAlexey Orishko if (((offset + len) > skb_in->len) || 1398d5ddb4a5SAlexey Orishko (len > ctx->rx_max) || (len < ETH_HLEN)) { 1399ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1400ae223cd4SBjørn Mork "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1401d5ddb4a5SAlexey Orishko x, offset, len, skb_in); 1402900d495aSAlexey Orishko if (!x) 140375d67d35SBjørn Mork goto err_ndp; 1404900d495aSAlexey Orishko break; 1405900d495aSAlexey Orishko 1406900d495aSAlexey Orishko } else { 14071e2c6117SBjørn Mork /* create a fresh copy to reduce truesize */ 14081e2c6117SBjørn Mork skb = netdev_alloc_skb_ip_align(dev->net, len); 14099e56790aSJesper Juhl if (!skb) 14109e56790aSJesper Juhl goto error; 14111e2c6117SBjørn Mork memcpy(skb_put(skb, len), skb_in->data + offset, len); 1412900d495aSAlexey Orishko usbnet_skb_return(dev, skb); 1413beeecd42SBjørn Mork payload += len; /* count payload bytes in this NTB */ 1414900d495aSAlexey Orishko } 1415900d495aSAlexey Orishko } 141675d67d35SBjørn Mork err_ndp: 141775d67d35SBjørn Mork /* are there more NDPs to process? */ 141875d67d35SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 141975d67d35SBjørn Mork if (ndpoffset && loopcount--) 142075d67d35SBjørn Mork goto next_ndp; 142175d67d35SBjørn Mork 1422beeecd42SBjørn Mork /* update stats */ 1423beeecd42SBjørn Mork ctx->rx_overhead += skb_in->len - payload; 1424beeecd42SBjørn Mork ctx->rx_ntbs++; 1425beeecd42SBjørn Mork 1426900d495aSAlexey Orishko return 1; 1427900d495aSAlexey Orishko error: 1428900d495aSAlexey Orishko return 0; 1429900d495aSAlexey Orishko } 14302f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1431900d495aSAlexey Orishko 1432900d495aSAlexey Orishko static void 1433bed6f762SBjørn Mork cdc_ncm_speed_change(struct usbnet *dev, 143484e77a8bSAlexey Orishko struct usb_cdc_speed_change *data) 1435900d495aSAlexey Orishko { 143684e77a8bSAlexey Orishko uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 143784e77a8bSAlexey Orishko uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1438900d495aSAlexey Orishko 1439900d495aSAlexey Orishko /* 1440900d495aSAlexey Orishko * Currently the USB-NET API does not support reporting the actual 1441900d495aSAlexey Orishko * device speed. Do print it instead. 1442900d495aSAlexey Orishko */ 1443900d495aSAlexey Orishko if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1444ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1445ae223cd4SBjørn Mork "%u mbit/s downlink %u mbit/s uplink\n", 1446900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000000U), 1447900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000000U)); 1448900d495aSAlexey Orishko } else { 1449ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1450ae223cd4SBjørn Mork "%u kbit/s downlink %u kbit/s uplink\n", 1451900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000U), 1452900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000U)); 1453900d495aSAlexey Orishko } 1454900d495aSAlexey Orishko } 1455900d495aSAlexey Orishko 1456900d495aSAlexey Orishko static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1457900d495aSAlexey Orishko { 1458900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1459900d495aSAlexey Orishko struct usb_cdc_notification *event; 1460900d495aSAlexey Orishko 1461900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1462900d495aSAlexey Orishko 1463900d495aSAlexey Orishko if (urb->actual_length < sizeof(*event)) 1464900d495aSAlexey Orishko return; 1465900d495aSAlexey Orishko 1466900d495aSAlexey Orishko /* test for split data in 8-byte chunks */ 1467900d495aSAlexey Orishko if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1468bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 146984e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)urb->transfer_buffer); 1470900d495aSAlexey Orishko return; 1471900d495aSAlexey Orishko } 1472900d495aSAlexey Orishko 1473900d495aSAlexey Orishko event = urb->transfer_buffer; 1474900d495aSAlexey Orishko 1475900d495aSAlexey Orishko switch (event->bNotificationType) { 1476900d495aSAlexey Orishko case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1477900d495aSAlexey Orishko /* 1478900d495aSAlexey Orishko * According to the CDC NCM specification ch.7.1 1479900d495aSAlexey Orishko * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1480900d495aSAlexey Orishko * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1481900d495aSAlexey Orishko */ 1482ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1483ae223cd4SBjørn Mork "network connection: %sconnected\n", 1484fa83dbeeSBjørn Mork !!event->wValue ? "" : "dis"); 1485fa83dbeeSBjørn Mork usbnet_link_change(dev, !!event->wValue, 0); 1486900d495aSAlexey Orishko break; 1487900d495aSAlexey Orishko 1488900d495aSAlexey Orishko case USB_CDC_NOTIFY_SPEED_CHANGE: 148984e77a8bSAlexey Orishko if (urb->actual_length < (sizeof(*event) + 149084e77a8bSAlexey Orishko sizeof(struct usb_cdc_speed_change))) 1491900d495aSAlexey Orishko set_bit(EVENT_STS_SPLIT, &dev->flags); 1492900d495aSAlexey Orishko else 1493bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 149484e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)&event[1]); 1495900d495aSAlexey Orishko break; 1496900d495aSAlexey Orishko 1497900d495aSAlexey Orishko default: 149867a36606SBjørn Mork dev_dbg(&dev->udev->dev, 149967a36606SBjørn Mork "NCM: unexpected notification 0x%02x!\n", 150067a36606SBjørn Mork event->bNotificationType); 1501900d495aSAlexey Orishko break; 1502900d495aSAlexey Orishko } 1503900d495aSAlexey Orishko } 1504900d495aSAlexey Orishko 1505900d495aSAlexey Orishko static const struct driver_info cdc_ncm_info = { 1506900d495aSAlexey Orishko .description = "CDC NCM", 1507c261344dSArnd Bergmann .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, 1508900d495aSAlexey Orishko .bind = cdc_ncm_bind, 1509900d495aSAlexey Orishko .unbind = cdc_ncm_unbind, 1510a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1511900d495aSAlexey Orishko .status = cdc_ncm_status, 1512900d495aSAlexey Orishko .rx_fixup = cdc_ncm_rx_fixup, 1513900d495aSAlexey Orishko .tx_fixup = cdc_ncm_tx_fixup, 1514900d495aSAlexey Orishko }; 1515900d495aSAlexey Orishko 1516f94898eaSDan Williams /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1517f94898eaSDan Williams static const struct driver_info wwan_info = { 1518f94898eaSDan Williams .description = "Mobile Broadband Network Device", 1519f94898eaSDan Williams .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 1520f94898eaSDan Williams | FLAG_WWAN, 1521f94898eaSDan Williams .bind = cdc_ncm_bind, 1522f94898eaSDan Williams .unbind = cdc_ncm_unbind, 1523a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1524f94898eaSDan Williams .status = cdc_ncm_status, 1525f94898eaSDan Williams .rx_fixup = cdc_ncm_rx_fixup, 1526f94898eaSDan Williams .tx_fixup = cdc_ncm_tx_fixup, 1527f94898eaSDan Williams }; 1528f94898eaSDan Williams 15292f62d5aaSWei Shuai /* Same as wwan_info, but with FLAG_NOARP */ 15302f62d5aaSWei Shuai static const struct driver_info wwan_noarp_info = { 15312f62d5aaSWei Shuai .description = "Mobile Broadband Network Device (NO ARP)", 15322f62d5aaSWei Shuai .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 15332f62d5aaSWei Shuai | FLAG_WWAN | FLAG_NOARP, 15342f62d5aaSWei Shuai .bind = cdc_ncm_bind, 15352f62d5aaSWei Shuai .unbind = cdc_ncm_unbind, 15362f62d5aaSWei Shuai .manage_power = usbnet_manage_power, 15372f62d5aaSWei Shuai .status = cdc_ncm_status, 15382f62d5aaSWei Shuai .rx_fixup = cdc_ncm_rx_fixup, 15392f62d5aaSWei Shuai .tx_fixup = cdc_ncm_tx_fixup, 15402f62d5aaSWei Shuai }; 15412f62d5aaSWei Shuai 1542f94898eaSDan Williams static const struct usb_device_id cdc_devs[] = { 1543f94898eaSDan Williams /* Ericsson MBM devices like F5521gw */ 1544f94898eaSDan Williams { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1545f94898eaSDan Williams | USB_DEVICE_ID_MATCH_VENDOR, 1546f94898eaSDan Williams .idVendor = 0x0bdb, 1547f94898eaSDan Williams .bInterfaceClass = USB_CLASS_COMM, 1548f94898eaSDan Williams .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1549f94898eaSDan Williams .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1550f94898eaSDan Williams .driver_info = (unsigned long) &wwan_info, 1551f94898eaSDan Williams }, 1552f94898eaSDan Williams 1553f3a1ef9cSPeter Meiser /* Dell branded MBM devices like DW5550 */ 1554f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1555f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1556f3a1ef9cSPeter Meiser .idVendor = 0x413c, 1557f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1558f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1559f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1560f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1561f3a1ef9cSPeter Meiser }, 1562f3a1ef9cSPeter Meiser 1563f3a1ef9cSPeter Meiser /* Toshiba branded MBM devices */ 1564f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1565f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1566f3a1ef9cSPeter Meiser .idVendor = 0x0930, 1567f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1568f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1569f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1570f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1571f3a1ef9cSPeter Meiser }, 1572f3a1ef9cSPeter Meiser 15731f84eab4SBjørn Mork /* tag Huawei devices as wwan */ 15741f84eab4SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 15751f84eab4SBjørn Mork USB_CLASS_COMM, 15761f84eab4SBjørn Mork USB_CDC_SUBCLASS_NCM, 15771f84eab4SBjørn Mork USB_CDC_PROTO_NONE), 15781f84eab4SBjørn Mork .driver_info = (unsigned long)&wwan_info, 15791f84eab4SBjørn Mork }, 15801f84eab4SBjørn Mork 15812f62d5aaSWei Shuai /* Infineon(now Intel) HSPA Modem platform */ 15822f62d5aaSWei Shuai { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 15832f62d5aaSWei Shuai USB_CLASS_COMM, 15842f62d5aaSWei Shuai USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 15852f62d5aaSWei Shuai .driver_info = (unsigned long)&wwan_noarp_info, 15862f62d5aaSWei Shuai }, 15872f62d5aaSWei Shuai 1588f94898eaSDan Williams /* Generic CDC-NCM devices */ 1589f94898eaSDan Williams { USB_INTERFACE_INFO(USB_CLASS_COMM, 1590f94898eaSDan Williams USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1591f94898eaSDan Williams .driver_info = (unsigned long)&cdc_ncm_info, 1592f94898eaSDan Williams }, 1593f94898eaSDan Williams { 1594f94898eaSDan Williams }, 1595f94898eaSDan Williams }; 1596f94898eaSDan Williams MODULE_DEVICE_TABLE(usb, cdc_devs); 1597f94898eaSDan Williams 1598900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver = { 1599900d495aSAlexey Orishko .name = "cdc_ncm", 1600900d495aSAlexey Orishko .id_table = cdc_devs, 1601085e50e1SBjørn Mork .probe = usbnet_probe, 1602085e50e1SBjørn Mork .disconnect = usbnet_disconnect, 1603900d495aSAlexey Orishko .suspend = usbnet_suspend, 1604900d495aSAlexey Orishko .resume = usbnet_resume, 160585e3c65fSStefan Metzmacher .reset_resume = usbnet_resume, 1606900d495aSAlexey Orishko .supports_autosuspend = 1, 1607e1f12eb6SSarah Sharp .disable_hub_initiated_lpm = 1, 1608900d495aSAlexey Orishko }; 1609900d495aSAlexey Orishko 1610d632eb1bSGreg Kroah-Hartman module_usb_driver(cdc_ncm_driver); 1611900d495aSAlexey Orishko 1612900d495aSAlexey Orishko MODULE_AUTHOR("Hans Petter Selasky"); 1613900d495aSAlexey Orishko MODULE_DESCRIPTION("USB CDC NCM host driver"); 1614900d495aSAlexey Orishko MODULE_LICENSE("Dual BSD/GPL"); 1615