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> 441dfddff5SBjørn Mork #include <linux/etherdevice.h> 45900d495aSAlexey Orishko #include <linux/ethtool.h> 46900d495aSAlexey Orishko #include <linux/workqueue.h> 47900d495aSAlexey Orishko #include <linux/mii.h> 48900d495aSAlexey Orishko #include <linux/crc32.h> 49900d495aSAlexey Orishko #include <linux/usb.h> 50c84ff1d6SAlexey Orishko #include <linux/hrtimer.h> 51900d495aSAlexey Orishko #include <linux/atomic.h> 52900d495aSAlexey Orishko #include <linux/usb/usbnet.h> 53900d495aSAlexey Orishko #include <linux/usb/cdc.h> 54c91ce3b6SBjørn Mork #include <linux/usb/cdc_ncm.h> 55900d495aSAlexey Orishko 561e8bbe6cSBjørn Mork #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) 571e8bbe6cSBjørn Mork static bool prefer_mbim = true; 581e8bbe6cSBjørn Mork #else 591e8bbe6cSBjørn Mork static bool prefer_mbim; 601e8bbe6cSBjørn Mork #endif 611e8bbe6cSBjørn Mork module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); 621e8bbe6cSBjørn Mork MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 631e8bbe6cSBjørn Mork 64c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param); 65c84ff1d6SAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); 66c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); 67900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver; 68900d495aSAlexey Orishko 69beeecd42SBjørn Mork struct cdc_ncm_stats { 70beeecd42SBjørn Mork char stat_string[ETH_GSTRING_LEN]; 71beeecd42SBjørn Mork int sizeof_stat; 72beeecd42SBjørn Mork int stat_offset; 73beeecd42SBjørn Mork }; 74beeecd42SBjørn Mork 75beeecd42SBjørn Mork #define CDC_NCM_STAT(str, m) { \ 76beeecd42SBjørn Mork .stat_string = str, \ 77beeecd42SBjørn Mork .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ 78beeecd42SBjørn Mork .stat_offset = offsetof(struct cdc_ncm_ctx, m) } 79beeecd42SBjørn Mork #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) 80beeecd42SBjørn Mork 81beeecd42SBjørn Mork static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { 82beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), 83beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), 84beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_timeout), 85beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), 86beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_overhead), 87beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(tx_ntbs), 88beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(rx_overhead), 89beeecd42SBjørn Mork CDC_NCM_SIMPLE_STAT(rx_ntbs), 90beeecd42SBjørn Mork }; 91beeecd42SBjørn Mork 92beeecd42SBjørn Mork static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) 93beeecd42SBjørn Mork { 94beeecd42SBjørn Mork switch (sset) { 95beeecd42SBjørn Mork case ETH_SS_STATS: 96beeecd42SBjørn Mork return ARRAY_SIZE(cdc_ncm_gstrings_stats); 97beeecd42SBjørn Mork default: 98beeecd42SBjørn Mork return -EOPNOTSUPP; 99beeecd42SBjørn Mork } 100beeecd42SBjørn Mork } 101beeecd42SBjørn Mork 102beeecd42SBjørn Mork static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, 103beeecd42SBjørn Mork struct ethtool_stats __always_unused *stats, 104beeecd42SBjørn Mork u64 *data) 105beeecd42SBjørn Mork { 106beeecd42SBjørn Mork struct usbnet *dev = netdev_priv(netdev); 107beeecd42SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 108beeecd42SBjørn Mork int i; 109beeecd42SBjørn Mork char *p = NULL; 110beeecd42SBjørn Mork 111beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 112beeecd42SBjørn Mork p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; 113beeecd42SBjørn Mork data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; 114beeecd42SBjørn Mork } 115beeecd42SBjørn Mork } 116beeecd42SBjørn Mork 117beeecd42SBjørn Mork static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) 118beeecd42SBjørn Mork { 119beeecd42SBjørn Mork u8 *p = data; 120beeecd42SBjørn Mork int i; 121beeecd42SBjørn Mork 122beeecd42SBjørn Mork switch (stringset) { 123beeecd42SBjørn Mork case ETH_SS_STATS: 124beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 125beeecd42SBjørn Mork memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); 126beeecd42SBjørn Mork p += ETH_GSTRING_LEN; 127beeecd42SBjørn Mork } 128beeecd42SBjørn Mork } 129beeecd42SBjørn Mork } 130beeecd42SBjørn Mork 1316c4e548fSBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); 1326c4e548fSBjørn Mork 1336c4e548fSBjørn Mork static const struct ethtool_ops cdc_ncm_ethtool_ops = { 1346c4e548fSBjørn Mork .get_link = usbnet_get_link, 1356c4e548fSBjørn Mork .nway_reset = usbnet_nway_reset, 1366c4e548fSBjørn Mork .get_drvinfo = usbnet_get_drvinfo, 1376c4e548fSBjørn Mork .get_msglevel = usbnet_get_msglevel, 1386c4e548fSBjørn Mork .set_msglevel = usbnet_set_msglevel, 1396c4e548fSBjørn Mork .get_ts_info = ethtool_op_get_ts_info, 140beeecd42SBjørn Mork .get_sset_count = cdc_ncm_get_sset_count, 141beeecd42SBjørn Mork .get_strings = cdc_ncm_get_strings, 142beeecd42SBjørn Mork .get_ethtool_stats = cdc_ncm_get_ethtool_stats, 143d0b3ab30SPhilippe Reynes .get_link_ksettings = usbnet_get_link_ksettings, 144d0b3ab30SPhilippe Reynes .set_link_ksettings = usbnet_set_link_ksettings, 1456c4e548fSBjørn Mork }; 1466c4e548fSBjørn Mork 147289507d3SBjørn Mork static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) 1485aa73d5dSBjørn Mork { 1495aa73d5dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1505aa73d5dSBjørn Mork u32 val, max, min; 1515aa73d5dSBjørn Mork 1525aa73d5dSBjørn Mork /* clamp new_rx to sane values */ 1535aa73d5dSBjørn Mork min = USB_CDC_NCM_NTB_MIN_IN_SIZE; 1545aa73d5dSBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 1555aa73d5dSBjørn Mork 1565aa73d5dSBjørn Mork /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ 1575aa73d5dSBjørn Mork if (max < min) { 1585aa73d5dSBjørn Mork dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", 1595aa73d5dSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); 1605aa73d5dSBjørn Mork max = min; 1615aa73d5dSBjørn Mork } 1625aa73d5dSBjørn Mork 1635aa73d5dSBjørn Mork val = clamp_t(u32, new_rx, min, max); 164289507d3SBjørn Mork if (val != new_rx) 165289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); 166289507d3SBjørn Mork 167289507d3SBjørn Mork return val; 1685aa73d5dSBjørn Mork } 1695aa73d5dSBjørn Mork 170289507d3SBjørn Mork static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) 171289507d3SBjørn Mork { 172289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 173289507d3SBjørn Mork u32 val, max, min; 174289507d3SBjørn Mork 175289507d3SBjørn Mork /* clamp new_tx to sane values */ 176289507d3SBjørn Mork min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); 177289507d3SBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 178289507d3SBjørn Mork 179289507d3SBjørn Mork /* some devices set dwNtbOutMaxSize too low for the above default */ 180289507d3SBjørn Mork min = min(min, max); 181289507d3SBjørn Mork 182289507d3SBjørn Mork val = clamp_t(u32, new_tx, min, max); 183289507d3SBjørn Mork if (val != new_tx) 184289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); 185289507d3SBjørn Mork 186289507d3SBjørn Mork return val; 187289507d3SBjørn Mork } 188289507d3SBjørn Mork 18939eb7e0eSBjørn Mork static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) 19039eb7e0eSBjørn Mork { 19139eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 19239eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 19339eb7e0eSBjørn Mork 19439eb7e0eSBjørn Mork return sprintf(buf, "%u\n", ctx->min_tx_pkt); 19539eb7e0eSBjørn Mork } 19639eb7e0eSBjørn Mork 197289507d3SBjørn Mork static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) 198289507d3SBjørn Mork { 199289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 200289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 201289507d3SBjørn Mork 202289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->rx_max); 203289507d3SBjørn Mork } 204289507d3SBjørn Mork 205289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) 206289507d3SBjørn Mork { 207289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 208289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 209289507d3SBjørn Mork 210289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->tx_max); 211289507d3SBjørn Mork } 212289507d3SBjørn Mork 213289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) 214289507d3SBjørn Mork { 215289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 216289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 217289507d3SBjørn Mork 218289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); 219289507d3SBjørn Mork } 220289507d3SBjørn Mork 22139eb7e0eSBjørn Mork static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 22239eb7e0eSBjørn Mork { 22339eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 22439eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 22539eb7e0eSBjørn Mork unsigned long val; 22639eb7e0eSBjørn Mork 22739eb7e0eSBjørn Mork /* no need to restrict values - anything from 0 to infinity is OK */ 22839eb7e0eSBjørn Mork if (kstrtoul(buf, 0, &val)) 22939eb7e0eSBjørn Mork return -EINVAL; 23039eb7e0eSBjørn Mork 23139eb7e0eSBjørn Mork ctx->min_tx_pkt = val; 23239eb7e0eSBjørn Mork return len; 23339eb7e0eSBjørn Mork } 23439eb7e0eSBjørn Mork 235289507d3SBjørn Mork static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 236289507d3SBjørn Mork { 237289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 238289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 239289507d3SBjørn Mork unsigned long val; 240289507d3SBjørn Mork 241289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) 242289507d3SBjørn Mork return -EINVAL; 243289507d3SBjørn Mork 244289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); 245289507d3SBjørn Mork return len; 246289507d3SBjørn Mork } 247289507d3SBjørn Mork 248289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 249289507d3SBjørn Mork { 250289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 251289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 252289507d3SBjørn Mork unsigned long val; 253289507d3SBjørn Mork 254289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) 255289507d3SBjørn Mork return -EINVAL; 256289507d3SBjørn Mork 257289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); 258289507d3SBjørn Mork return len; 259289507d3SBjørn Mork } 260289507d3SBjørn Mork 261289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 262289507d3SBjørn Mork { 263289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 264289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 265289507d3SBjørn Mork ssize_t ret; 266289507d3SBjørn Mork unsigned long val; 267289507d3SBjørn Mork 268289507d3SBjørn Mork ret = kstrtoul(buf, 0, &val); 269289507d3SBjørn Mork if (ret) 270289507d3SBjørn Mork return ret; 271289507d3SBjørn Mork if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) 272289507d3SBjørn Mork return -EINVAL; 273289507d3SBjørn Mork 274289507d3SBjørn Mork spin_lock_bh(&ctx->mtx); 275289507d3SBjørn Mork ctx->timer_interval = val * NSEC_PER_USEC; 276289507d3SBjørn Mork if (!ctx->timer_interval) 277289507d3SBjørn Mork ctx->tx_timer_pending = 0; 278289507d3SBjørn Mork spin_unlock_bh(&ctx->mtx); 279289507d3SBjørn Mork return len; 280289507d3SBjørn Mork } 281289507d3SBjørn Mork 28239eb7e0eSBjørn Mork static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); 283289507d3SBjørn Mork static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); 284289507d3SBjørn Mork static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); 285289507d3SBjørn Mork static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); 286289507d3SBjørn Mork 287404814afSBjørn Mork static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) 288404814afSBjørn Mork { 289404814afSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 290404814afSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 291404814afSBjørn Mork 292404814afSBjørn Mork return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); 293404814afSBjørn Mork } 294404814afSBjørn Mork 295404814afSBjørn Mork static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 296404814afSBjørn Mork { 297404814afSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 298404814afSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 299404814afSBjørn Mork bool enable; 300404814afSBjørn Mork 301404814afSBjørn Mork if (strtobool(buf, &enable)) 302404814afSBjørn Mork return -EINVAL; 303404814afSBjørn Mork 304404814afSBjørn Mork /* no change? */ 305404814afSBjørn Mork if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 306404814afSBjørn Mork return len; 307404814afSBjørn Mork 308404814afSBjørn Mork if (enable && !ctx->delayed_ndp16) { 309404814afSBjørn Mork ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 310404814afSBjørn Mork if (!ctx->delayed_ndp16) 311404814afSBjørn Mork return -ENOMEM; 312404814afSBjørn Mork } 313404814afSBjørn Mork 314404814afSBjørn Mork /* flush pending data before changing flag */ 315404814afSBjørn Mork netif_tx_lock_bh(dev->net); 316404814afSBjørn Mork usbnet_start_xmit(NULL, dev->net); 317404814afSBjørn Mork spin_lock_bh(&ctx->mtx); 318404814afSBjørn Mork if (enable) 319404814afSBjørn Mork ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; 320404814afSBjørn Mork else 321404814afSBjørn Mork ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; 322404814afSBjørn Mork spin_unlock_bh(&ctx->mtx); 323404814afSBjørn Mork netif_tx_unlock_bh(dev->net); 324404814afSBjørn Mork 325404814afSBjørn Mork return len; 326404814afSBjørn Mork } 327404814afSBjørn Mork static DEVICE_ATTR_RW(ndp_to_end); 328404814afSBjørn Mork 329871578c9SBjørn Mork #define NCM_PARM_ATTR(name, format, tocpu) \ 330871578c9SBjørn Mork static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ 331871578c9SBjørn Mork { \ 332871578c9SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); \ 333871578c9SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ 334871578c9SBjørn Mork return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ 335871578c9SBjørn Mork } \ 336871578c9SBjørn Mork static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) 337871578c9SBjørn Mork 338871578c9SBjørn Mork NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); 339871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 340871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); 341871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); 342871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); 343871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); 344871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); 345871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); 346871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); 347871578c9SBjørn Mork NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); 348871578c9SBjørn Mork 349289507d3SBjørn Mork static struct attribute *cdc_ncm_sysfs_attrs[] = { 35039eb7e0eSBjørn Mork &dev_attr_min_tx_pkt.attr, 351404814afSBjørn Mork &dev_attr_ndp_to_end.attr, 352289507d3SBjørn Mork &dev_attr_rx_max.attr, 353289507d3SBjørn Mork &dev_attr_tx_max.attr, 354289507d3SBjørn Mork &dev_attr_tx_timer_usecs.attr, 355871578c9SBjørn Mork &dev_attr_bmNtbFormatsSupported.attr, 356871578c9SBjørn Mork &dev_attr_dwNtbInMaxSize.attr, 357871578c9SBjørn Mork &dev_attr_wNdpInDivisor.attr, 358871578c9SBjørn Mork &dev_attr_wNdpInPayloadRemainder.attr, 359871578c9SBjørn Mork &dev_attr_wNdpInAlignment.attr, 360871578c9SBjørn Mork &dev_attr_dwNtbOutMaxSize.attr, 361871578c9SBjørn Mork &dev_attr_wNdpOutDivisor.attr, 362871578c9SBjørn Mork &dev_attr_wNdpOutPayloadRemainder.attr, 363871578c9SBjørn Mork &dev_attr_wNdpOutAlignment.attr, 364871578c9SBjørn Mork &dev_attr_wNtbOutMaxDatagrams.attr, 365289507d3SBjørn Mork NULL, 366289507d3SBjørn Mork }; 367289507d3SBjørn Mork 368289507d3SBjørn Mork static struct attribute_group cdc_ncm_sysfs_attr_group = { 369289507d3SBjørn Mork .name = "cdc_ncm", 370289507d3SBjørn Mork .attrs = cdc_ncm_sysfs_attrs, 371289507d3SBjørn Mork }; 372289507d3SBjørn Mork 373289507d3SBjørn Mork /* handle rx_max and tx_max changes */ 374289507d3SBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) 375289507d3SBjørn Mork { 376289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 377289507d3SBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 378289507d3SBjørn Mork u32 val; 379289507d3SBjørn Mork 380289507d3SBjørn Mork val = cdc_ncm_check_rx_max(dev, new_rx); 381289507d3SBjørn Mork 3825aa73d5dSBjørn Mork /* inform device about NTB input size changes */ 3835aa73d5dSBjørn Mork if (val != ctx->rx_max) { 3845aa73d5dSBjørn Mork __le32 dwNtbInMaxSize = cpu_to_le32(val); 3855aa73d5dSBjørn Mork 3865aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); 38768864abfSBjørn Mork 38868864abfSBjørn Mork /* tell device to use new size */ 3895aa73d5dSBjørn Mork if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 3905aa73d5dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 3915aa73d5dSBjørn Mork | USB_RECIP_INTERFACE, 3925aa73d5dSBjørn Mork 0, iface_no, &dwNtbInMaxSize, 4) < 0) 3935aa73d5dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 3945aa73d5dSBjørn Mork else 3955aa73d5dSBjørn Mork ctx->rx_max = val; 3965aa73d5dSBjørn Mork } 3975aa73d5dSBjørn Mork 398f42763dbSBjørn Mork /* usbnet use these values for sizing rx queues */ 399f42763dbSBjørn Mork if (dev->rx_urb_size != ctx->rx_max) { 400f42763dbSBjørn Mork dev->rx_urb_size = ctx->rx_max; 401f42763dbSBjørn Mork if (netif_running(dev->net)) 402f42763dbSBjørn Mork usbnet_unlink_rx_urbs(dev); 403f42763dbSBjørn Mork } 404f42763dbSBjørn Mork 405289507d3SBjørn Mork val = cdc_ncm_check_tx_max(dev, new_tx); 4065aa73d5dSBjørn Mork if (val != ctx->tx_max) 4075aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); 40808c74fc9SBjørn Mork 40908c74fc9SBjørn Mork /* Adding a pad byte here if necessary simplifies the handling 41008c74fc9SBjørn Mork * in cdc_ncm_fill_tx_frame, making tx_max always represent 41108c74fc9SBjørn Mork * the real skb max size. 41208c74fc9SBjørn Mork * 41308c74fc9SBjørn Mork * We cannot use dev->maxpacket here because this is called from 41408c74fc9SBjørn Mork * .bind which is called before usbnet sets up dev->maxpacket 41508c74fc9SBjørn Mork */ 41668864abfSBjørn Mork if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 41768864abfSBjørn Mork val % usb_maxpacket(dev->udev, dev->out, 1) == 0) 41868864abfSBjørn Mork val++; 41908c74fc9SBjørn Mork 42068864abfSBjørn Mork /* we might need to flush any pending tx buffers if running */ 42168864abfSBjørn Mork if (netif_running(dev->net) && val > ctx->tx_max) { 42268864abfSBjørn Mork netif_tx_lock_bh(dev->net); 42368864abfSBjørn Mork usbnet_start_xmit(NULL, dev->net); 4241ba5d0ffSBjørn Mork /* make sure tx_curr_skb is reallocated if it was empty */ 4251ba5d0ffSBjørn Mork if (ctx->tx_curr_skb) { 4261ba5d0ffSBjørn Mork dev_kfree_skb_any(ctx->tx_curr_skb); 4271ba5d0ffSBjørn Mork ctx->tx_curr_skb = NULL; 4281ba5d0ffSBjørn Mork } 42968864abfSBjørn Mork ctx->tx_max = val; 43068864abfSBjørn Mork netif_tx_unlock_bh(dev->net); 43168864abfSBjørn Mork } else { 43268864abfSBjørn Mork ctx->tx_max = val; 43368864abfSBjørn Mork } 43468864abfSBjørn Mork 43508c74fc9SBjørn Mork dev->hard_mtu = ctx->tx_max; 43668864abfSBjørn Mork 43768864abfSBjørn Mork /* max qlen depend on hard_mtu and rx_urb_size */ 43868864abfSBjørn Mork usbnet_update_max_qlen(dev); 43943e4c6dfSBjørn Mork 44043e4c6dfSBjørn Mork /* never pad more than 3 full USB packets per transfer */ 44143e4c6dfSBjørn Mork ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), 44243e4c6dfSBjørn Mork CDC_NCM_MIN_TX_PKT, ctx->tx_max); 4435aa73d5dSBjørn Mork } 4445aa73d5dSBjørn Mork 445f8afb73dSBjørn Mork /* helpers for NCM and MBIM differences */ 446f8afb73dSBjørn Mork static u8 cdc_ncm_flags(struct usbnet *dev) 447900d495aSAlexey Orishko { 448bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 449900d495aSAlexey Orishko 450f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 451f8afb73dSBjørn Mork return ctx->mbim_desc->bmNetworkCapabilities; 452f8afb73dSBjørn Mork if (ctx->func_desc) 453f8afb73dSBjørn Mork return ctx->func_desc->bmNetworkCapabilities; 454f8afb73dSBjørn Mork return 0; 455f8afb73dSBjørn Mork } 456f8afb73dSBjørn Mork 457f8afb73dSBjørn Mork static int cdc_ncm_eth_hlen(struct usbnet *dev) 458f8afb73dSBjørn Mork { 459f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 460f8afb73dSBjørn Mork return 0; 461f8afb73dSBjørn Mork return ETH_HLEN; 462f8afb73dSBjørn Mork } 463f8afb73dSBjørn Mork 464f8afb73dSBjørn Mork static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) 465f8afb73dSBjørn Mork { 466f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 467f8afb73dSBjørn Mork return CDC_MBIM_MIN_DATAGRAM_SIZE; 468f8afb73dSBjørn Mork return CDC_NCM_MIN_DATAGRAM_SIZE; 469f8afb73dSBjørn Mork } 470f8afb73dSBjørn Mork 471f8afb73dSBjørn Mork static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) 472f8afb73dSBjørn Mork { 473f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 474f8afb73dSBjørn Mork 475f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 476f8afb73dSBjørn Mork return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 477f8afb73dSBjørn Mork if (ctx->ether_desc) 478f8afb73dSBjørn Mork return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 479f8afb73dSBjørn Mork return CDC_NCM_MAX_DATAGRAM_SIZE; 480f8afb73dSBjørn Mork } 481f8afb73dSBjørn Mork 482f8afb73dSBjørn Mork /* initial one-time device setup. MUST be called with the data interface 483f8afb73dSBjørn Mork * in altsetting 0 484f8afb73dSBjørn Mork */ 485f8afb73dSBjørn Mork static int cdc_ncm_init(struct usbnet *dev) 486f8afb73dSBjørn Mork { 487f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 488f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 489f8afb73dSBjørn Mork int err; 490900d495aSAlexey Orishko 49190b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 49236c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 49336c35416SGiuseppe Scrivano |USB_RECIP_INTERFACE, 494ff0992e9SBjørn Mork 0, iface_no, &ctx->ncm_parm, 495ff0992e9SBjørn Mork sizeof(ctx->ncm_parm)); 49636c35416SGiuseppe Scrivano if (err < 0) { 49759ede316SBjørn Mork dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 49859ede316SBjørn Mork return err; /* GET_NTB_PARAMETERS is required */ 499900d495aSAlexey Orishko } 500900d495aSAlexey Orishko 501f8afb73dSBjørn Mork /* set CRC Mode */ 502f8afb73dSBjørn Mork if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { 503f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); 504f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 505f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 506f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 507f8afb73dSBjørn Mork USB_CDC_NCM_CRC_NOT_APPENDED, 508f8afb73dSBjørn Mork iface_no, NULL, 0); 509f8afb73dSBjørn Mork if (err < 0) 510f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); 511f8afb73dSBjørn Mork } 512f8afb73dSBjørn Mork 513f8afb73dSBjørn Mork /* set NTB format, if both formats are supported. 514f8afb73dSBjørn Mork * 515f8afb73dSBjørn Mork * "The host shall only send this command while the NCM Data 516f8afb73dSBjørn Mork * Interface is in alternate setting 0." 517f8afb73dSBjørn Mork */ 518d22adbfbSDan Carpenter if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & 519d22adbfbSDan Carpenter USB_CDC_NCM_NTB32_SUPPORTED) { 520f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); 521f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 522f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 523f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 524f8afb73dSBjørn Mork USB_CDC_NCM_NTB16_FORMAT, 525f8afb73dSBjørn Mork iface_no, NULL, 0); 526f8afb73dSBjørn Mork if (err < 0) 527f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); 528f8afb73dSBjørn Mork } 529f8afb73dSBjørn Mork 530f8afb73dSBjørn Mork /* set initial device values */ 531ff0992e9SBjørn Mork ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 532ff0992e9SBjørn Mork ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 533ff0992e9SBjørn Mork ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 534ff0992e9SBjørn Mork ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 535ff0992e9SBjørn Mork ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 53684e77a8bSAlexey Orishko /* devices prior to NCM Errata shall set this field to zero */ 537ff0992e9SBjørn Mork ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 53847175e5fSBjørn Mork 539ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, 540ae223cd4SBjørn Mork "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 541900d495aSAlexey Orishko ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 542f8afb73dSBjørn Mork ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); 543900d495aSAlexey Orishko 54484e77a8bSAlexey Orishko /* max count of tx datagrams */ 54584e77a8bSAlexey Orishko if ((ctx->tx_max_datagrams == 0) || 54684e77a8bSAlexey Orishko (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 547900d495aSAlexey Orishko ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 548900d495aSAlexey Orishko 54970559b89SBjørn Mork /* set up maximum NDP size */ 55070559b89SBjørn Mork ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); 55170559b89SBjørn Mork 5526c4e548fSBjørn Mork /* initial coalescing timer interval */ 5536c4e548fSBjørn Mork ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; 5546c4e548fSBjørn Mork 555f8afb73dSBjørn Mork return 0; 556f8afb73dSBjørn Mork } 557f8afb73dSBjørn Mork 558f8afb73dSBjørn Mork /* set a new max datagram size */ 559f8afb73dSBjørn Mork static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) 560f8afb73dSBjørn Mork { 561f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 562f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 563f8afb73dSBjørn Mork __le16 max_datagram_size; 564f8afb73dSBjørn Mork u16 mbim_mtu; 565f8afb73dSBjørn Mork int err; 566f8afb73dSBjørn Mork 567f8afb73dSBjørn Mork /* set default based on descriptors */ 568f8afb73dSBjørn Mork ctx->max_datagram_size = clamp_t(u32, new_size, 569f8afb73dSBjørn Mork cdc_ncm_min_dgram_size(dev), 570f8afb73dSBjørn Mork CDC_NCM_MAX_DATAGRAM_SIZE); 571f8afb73dSBjørn Mork 572f8afb73dSBjørn Mork /* inform the device about the selected Max Datagram Size? */ 573f8afb73dSBjørn Mork if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 574f8afb73dSBjørn Mork goto out; 575f8afb73dSBjørn Mork 576f8afb73dSBjørn Mork /* read current mtu value from device */ 577f8afb73dSBjørn Mork err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 578f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 579f8afb73dSBjørn Mork 0, iface_no, &max_datagram_size, 2); 580f8afb73dSBjørn Mork if (err < 0) { 581f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 582f8afb73dSBjørn Mork goto out; 583f8afb73dSBjørn Mork } 584f8afb73dSBjørn Mork 585f8afb73dSBjørn Mork if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 586f8afb73dSBjørn Mork goto out; 587f8afb73dSBjørn Mork 588f8afb73dSBjørn Mork max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 589f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 590f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 591f8afb73dSBjørn Mork 0, iface_no, &max_datagram_size, 2); 592f8afb73dSBjørn Mork if (err < 0) 593f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 594f8afb73dSBjørn Mork 595f8afb73dSBjørn Mork out: 596f8afb73dSBjørn Mork /* set MTU to max supported by the device if necessary */ 597f8afb73dSBjørn Mork dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); 598f8afb73dSBjørn Mork 599f8afb73dSBjørn Mork /* do not exceed operater preferred MTU */ 600f8afb73dSBjørn Mork if (ctx->mbim_extended_desc) { 601f8afb73dSBjørn Mork mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 602f8afb73dSBjørn Mork if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 603f8afb73dSBjørn Mork dev->net->mtu = mbim_mtu; 604f8afb73dSBjørn Mork } 605f8afb73dSBjørn Mork } 606f8afb73dSBjørn Mork 607f8afb73dSBjørn Mork static void cdc_ncm_fix_modulus(struct usbnet *dev) 608f8afb73dSBjørn Mork { 609f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 610f8afb73dSBjørn Mork u32 val; 611900d495aSAlexey Orishko 612900d495aSAlexey Orishko /* 613900d495aSAlexey Orishko * verify that the structure alignment is: 614900d495aSAlexey Orishko * - power of two 615900d495aSAlexey Orishko * - not greater than the maximum transmit length 616900d495aSAlexey Orishko * - not less than four bytes 617900d495aSAlexey Orishko */ 618900d495aSAlexey Orishko val = ctx->tx_ndp_modulus; 619900d495aSAlexey Orishko 620900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 621900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 622ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 623900d495aSAlexey Orishko ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 624900d495aSAlexey Orishko } 625900d495aSAlexey Orishko 626900d495aSAlexey Orishko /* 627900d495aSAlexey Orishko * verify that the payload alignment is: 628900d495aSAlexey Orishko * - power of two 629900d495aSAlexey Orishko * - not greater than the maximum transmit length 630900d495aSAlexey Orishko * - not less than four bytes 631900d495aSAlexey Orishko */ 632900d495aSAlexey Orishko val = ctx->tx_modulus; 633900d495aSAlexey Orishko 634900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 635900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 636ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 637900d495aSAlexey Orishko ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 638900d495aSAlexey Orishko } 639900d495aSAlexey Orishko 640900d495aSAlexey Orishko /* verify the payload remainder */ 641900d495aSAlexey Orishko if (ctx->tx_remainder >= ctx->tx_modulus) { 642ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 643900d495aSAlexey Orishko ctx->tx_remainder = 0; 644900d495aSAlexey Orishko } 645900d495aSAlexey Orishko 646900d495aSAlexey Orishko /* adjust TX-remainder according to NCM specification. */ 647f8afb73dSBjørn Mork ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & 648900d495aSAlexey Orishko (ctx->tx_modulus - 1)); 64984e77a8bSAlexey Orishko } 650900d495aSAlexey Orishko 651f8afb73dSBjørn Mork static int cdc_ncm_setup(struct usbnet *dev) 652f8afb73dSBjørn Mork { 653f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 65450f1cb1cSBjørn Mork u32 def_rx, def_tx; 65550f1cb1cSBjørn Mork 65650f1cb1cSBjørn Mork /* be conservative when selecting intial buffer size to 65750f1cb1cSBjørn Mork * increase the number of hosts this will work for 65850f1cb1cSBjørn Mork */ 65950f1cb1cSBjørn Mork def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, 66050f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 66150f1cb1cSBjørn Mork def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, 66250f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 66384e77a8bSAlexey Orishko 664f8afb73dSBjørn Mork /* clamp rx_max and tx_max and inform device */ 66550f1cb1cSBjørn Mork cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); 6663f658cdeSAlexey Orishko 667f8afb73dSBjørn Mork /* sanitize the modulus and remainder values */ 668f8afb73dSBjørn Mork cdc_ncm_fix_modulus(dev); 669900d495aSAlexey Orishko 670f8afb73dSBjørn Mork /* set max datagram size */ 671f8afb73dSBjørn Mork cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); 672900d495aSAlexey Orishko return 0; 673900d495aSAlexey Orishko } 674900d495aSAlexey Orishko 675900d495aSAlexey Orishko static void 676ff1632aaSBjørn Mork cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 677900d495aSAlexey Orishko { 678ff1632aaSBjørn Mork struct usb_host_endpoint *e, *in = NULL, *out = NULL; 679900d495aSAlexey Orishko u8 ep; 680900d495aSAlexey Orishko 681900d495aSAlexey Orishko for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 682900d495aSAlexey Orishko 683900d495aSAlexey Orishko e = intf->cur_altsetting->endpoint + ep; 684900d495aSAlexey Orishko switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 685900d495aSAlexey Orishko case USB_ENDPOINT_XFER_INT: 686900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 687ff1632aaSBjørn Mork if (!dev->status) 688ff1632aaSBjørn Mork dev->status = e; 689900d495aSAlexey Orishko } 690900d495aSAlexey Orishko break; 691900d495aSAlexey Orishko 692900d495aSAlexey Orishko case USB_ENDPOINT_XFER_BULK: 693900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 694ff1632aaSBjørn Mork if (!in) 695ff1632aaSBjørn Mork in = e; 696900d495aSAlexey Orishko } else { 697ff1632aaSBjørn Mork if (!out) 698ff1632aaSBjørn Mork out = e; 699900d495aSAlexey Orishko } 700900d495aSAlexey Orishko break; 701900d495aSAlexey Orishko 702900d495aSAlexey Orishko default: 703900d495aSAlexey Orishko break; 704900d495aSAlexey Orishko } 705900d495aSAlexey Orishko } 706ff1632aaSBjørn Mork if (in && !dev->in) 707ff1632aaSBjørn Mork dev->in = usb_rcvbulkpipe(dev->udev, 708ff1632aaSBjørn Mork in->desc.bEndpointAddress & 709ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 710ff1632aaSBjørn Mork if (out && !dev->out) 711ff1632aaSBjørn Mork dev->out = usb_sndbulkpipe(dev->udev, 712ff1632aaSBjørn Mork out->desc.bEndpointAddress & 713ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 714900d495aSAlexey Orishko } 715900d495aSAlexey Orishko 716900d495aSAlexey Orishko static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 717900d495aSAlexey Orishko { 718900d495aSAlexey Orishko if (ctx == NULL) 719900d495aSAlexey Orishko return; 720900d495aSAlexey Orishko 721900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 722900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 723900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 724900d495aSAlexey Orishko } 725900d495aSAlexey Orishko 726900d495aSAlexey Orishko if (ctx->tx_curr_skb != NULL) { 727900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_curr_skb); 728900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 729900d495aSAlexey Orishko } 730900d495aSAlexey Orishko 7314a0e3e98SEnrico Mioso kfree(ctx->delayed_ndp16); 7324a0e3e98SEnrico Mioso 733900d495aSAlexey Orishko kfree(ctx); 734900d495aSAlexey Orishko } 735900d495aSAlexey Orishko 7361dfddff5SBjørn Mork /* we need to override the usbnet change_mtu ndo for two reasons: 7371dfddff5SBjørn Mork * - respect the negotiated maximum datagram size 7381dfddff5SBjørn Mork * - avoid unwanted changes to rx and tx buffers 7391dfddff5SBjørn Mork */ 7401dfddff5SBjørn Mork int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) 7411dfddff5SBjørn Mork { 7421dfddff5SBjørn Mork struct usbnet *dev = netdev_priv(net); 74305a56487SRafal Redzimski 7441dfddff5SBjørn Mork net->mtu = new_mtu; 74505a56487SRafal Redzimski cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); 74605a56487SRafal Redzimski 7471dfddff5SBjørn Mork return 0; 7481dfddff5SBjørn Mork } 7491dfddff5SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); 7501dfddff5SBjørn Mork 7511dfddff5SBjørn Mork static const struct net_device_ops cdc_ncm_netdev_ops = { 7521dfddff5SBjørn Mork .ndo_open = usbnet_open, 7531dfddff5SBjørn Mork .ndo_stop = usbnet_stop, 7541dfddff5SBjørn Mork .ndo_start_xmit = usbnet_start_xmit, 7551dfddff5SBjørn Mork .ndo_tx_timeout = usbnet_tx_timeout, 756c8b5d129SGreg Ungerer .ndo_get_stats64 = usbnet_get_stats64, 7571dfddff5SBjørn Mork .ndo_change_mtu = cdc_ncm_change_mtu, 7581dfddff5SBjørn Mork .ndo_set_mac_address = eth_mac_addr, 7591dfddff5SBjørn Mork .ndo_validate_addr = eth_validate_addr, 7601dfddff5SBjørn Mork }; 7611dfddff5SBjørn Mork 7624a0e3e98SEnrico Mioso int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) 763900d495aSAlexey Orishko { 764900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 765900d495aSAlexey Orishko struct usb_driver *driver; 766900d495aSAlexey Orishko u8 *buf; 767900d495aSAlexey Orishko int len; 768900d495aSAlexey Orishko int temp; 769900d495aSAlexey Orishko u8 iface_no; 77077b0a099SOliver Neukum struct usb_cdc_parsed_header hdr; 771900d495aSAlexey Orishko 772c796984fSThomas Meyer ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 7738f0923c1SDevendra Naga if (!ctx) 7748f0923c1SDevendra Naga return -ENOMEM; 775900d495aSAlexey Orishko 776c84ff1d6SAlexey Orishko hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 777c84ff1d6SAlexey Orishko ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 778bed6f762SBjørn Mork ctx->bh.data = (unsigned long)dev; 779c84ff1d6SAlexey Orishko ctx->bh.func = cdc_ncm_txpath_bh; 780c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 0); 781900d495aSAlexey Orishko spin_lock_init(&ctx->mtx); 782900d495aSAlexey Orishko 783900d495aSAlexey Orishko /* store ctx pointer in device data field */ 784900d495aSAlexey Orishko dev->data[0] = (unsigned long)ctx; 785900d495aSAlexey Orishko 7869fe0234cSBjørn Mork /* only the control interface can be successfully probed */ 7879fe0234cSBjørn Mork ctx->control = intf; 7889fe0234cSBjørn Mork 789900d495aSAlexey Orishko /* get some pointers */ 790900d495aSAlexey Orishko driver = driver_of(intf); 791900d495aSAlexey Orishko buf = intf->cur_altsetting->extra; 792900d495aSAlexey Orishko len = intf->cur_altsetting->extralen; 793900d495aSAlexey Orishko 794900d495aSAlexey Orishko /* parse through descriptors associated with control interface */ 79577b0a099SOliver Neukum cdc_parse_cdc_header(&hdr, intf, buf, len); 796900d495aSAlexey Orishko 7976527f833SBjørn Mork if (hdr.usb_cdc_union_desc) 798900d495aSAlexey Orishko ctx->data = usb_ifnum_to_if(dev->udev, 79977b0a099SOliver Neukum hdr.usb_cdc_union_desc->bSlaveInterface0); 80077b0a099SOliver Neukum ctx->ether_desc = hdr.usb_cdc_ether_desc; 80177b0a099SOliver Neukum ctx->func_desc = hdr.usb_cdc_ncm_desc; 80277b0a099SOliver Neukum ctx->mbim_desc = hdr.usb_cdc_mbim_desc; 80377b0a099SOliver Neukum ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; 804900d495aSAlexey Orishko 8059992c2e2SBjørn Mork /* some buggy devices have an IAD but no CDC Union */ 8066527f833SBjørn Mork if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 80756a666dcSBjørn Mork ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 80856a666dcSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 8099992c2e2SBjørn Mork } 8109992c2e2SBjørn Mork 811900d495aSAlexey Orishko /* check if we got everything */ 812f8afb73dSBjørn Mork if (!ctx->data) { 813f8afb73dSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); 814900d495aSAlexey Orishko goto error; 815296e81f8SBjørn Mork } 816f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { 817f8afb73dSBjørn Mork if (!ctx->mbim_desc) { 818f8afb73dSBjørn Mork dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); 819f8afb73dSBjørn Mork goto error; 820f8afb73dSBjørn Mork } 821f8afb73dSBjørn Mork } else { 822f8afb73dSBjørn Mork if (!ctx->ether_desc || !ctx->func_desc) { 823f8afb73dSBjørn Mork dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); 824f8afb73dSBjørn Mork goto error; 825f8afb73dSBjørn Mork } 826f8afb73dSBjørn Mork } 827900d495aSAlexey Orishko 828bbc8d922SBjørn Mork /* claim data interface, if different from control */ 829bbc8d922SBjørn Mork if (ctx->data != ctx->control) { 830900d495aSAlexey Orishko temp = usb_driver_claim_interface(driver, ctx->data, dev); 831296e81f8SBjørn Mork if (temp) { 832296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to claim data intf\n"); 833900d495aSAlexey Orishko goto error; 834bbc8d922SBjørn Mork } 835296e81f8SBjørn Mork } 836900d495aSAlexey Orishko 837900d495aSAlexey Orishko iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 838900d495aSAlexey Orishko 8397b8076ceSDaniele Palmas /* Device-specific flags */ 8407b8076ceSDaniele Palmas ctx->drvflags = drvflags; 8417b8076ceSDaniele Palmas 84248906f62SBjørn Mork /* Reset data interface. Some devices will not reset properly 84348906f62SBjørn Mork * unless they are configured first. Toggle the altsetting to 8447b8076ceSDaniele Palmas * force a reset. 8457b8076ceSDaniele Palmas * Some other devices do not work properly with this procedure 8467b8076ceSDaniele Palmas * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 84748906f62SBjørn Mork */ 8487b8076ceSDaniele Palmas if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) 84948906f62SBjørn Mork usb_set_interface(dev->udev, iface_no, data_altsetting); 8507b8076ceSDaniele Palmas 851900d495aSAlexey Orishko temp = usb_set_interface(dev->udev, iface_no, 0); 852296e81f8SBjørn Mork if (temp) { 853296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 85419694ac8SAlexey Orishko goto error2; 855296e81f8SBjørn Mork } 856900d495aSAlexey Orishko 85708c74fc9SBjørn Mork /* initialize basic device settings */ 85808c74fc9SBjørn Mork if (cdc_ncm_init(dev)) 859ff0992e9SBjørn Mork goto error2; 860ff0992e9SBjørn Mork 861c086e709SBjørn Mork /* Some firmwares need a pause here or they will silently fail 862c086e709SBjørn Mork * to set up the interface properly. This value was decided 863c086e709SBjørn Mork * empirically on a Sierra Wireless MC7455 running 02.08.02.00 864c086e709SBjørn Mork * firmware. 865c086e709SBjørn Mork */ 866c086e709SBjørn Mork usleep_range(10000, 20000); 867c086e709SBjørn Mork 868900d495aSAlexey Orishko /* configure data interface */ 86938396e4cSGreg Suarez temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 870296e81f8SBjørn Mork if (temp) { 871296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 87219694ac8SAlexey Orishko goto error2; 873296e81f8SBjørn Mork } 874900d495aSAlexey Orishko 875ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->data); 876ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->control); 877296e81f8SBjørn Mork if (!dev->in || !dev->out || !dev->status) { 878296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to collect endpoints\n"); 87919694ac8SAlexey Orishko goto error2; 880296e81f8SBjørn Mork } 881900d495aSAlexey Orishko 882900d495aSAlexey Orishko usb_set_intfdata(ctx->data, dev); 883900d495aSAlexey Orishko usb_set_intfdata(ctx->control, dev); 884900d495aSAlexey Orishko 88538396e4cSGreg Suarez if (ctx->ether_desc) { 886900d495aSAlexey Orishko temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 887296e81f8SBjørn Mork if (temp) { 888296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to get mac address\n"); 88919694ac8SAlexey Orishko goto error2; 890296e81f8SBjørn Mork } 891296e81f8SBjørn Mork dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 89238396e4cSGreg Suarez } 89338396e4cSGreg Suarez 89408c74fc9SBjørn Mork /* finish setting up the device specific data */ 89508c74fc9SBjørn Mork cdc_ncm_setup(dev); 896ff0992e9SBjørn Mork 8974a0e3e98SEnrico Mioso /* Allocate the delayed NDP if needed. */ 8984a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 8994a0e3e98SEnrico Mioso ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 9004a0e3e98SEnrico Mioso if (!ctx->delayed_ndp16) 9014a0e3e98SEnrico Mioso goto error2; 9024a0e3e98SEnrico Mioso dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 9034a0e3e98SEnrico Mioso } 9044a0e3e98SEnrico Mioso 9056c4e548fSBjørn Mork /* override ethtool_ops */ 9066c4e548fSBjørn Mork dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 9076c4e548fSBjørn Mork 908289507d3SBjørn Mork /* add our sysfs attrs */ 909289507d3SBjørn Mork dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 910289507d3SBjørn Mork 9111dfddff5SBjørn Mork /* must handle MTU changes */ 9121dfddff5SBjørn Mork dev->net->netdev_ops = &cdc_ncm_netdev_ops; 913f77f0aeeSJarod Wilson dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); 9141dfddff5SBjørn Mork 915900d495aSAlexey Orishko return 0; 916900d495aSAlexey Orishko 91719694ac8SAlexey Orishko error2: 91819694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 91919694ac8SAlexey Orishko usb_set_intfdata(ctx->data, NULL); 9206b4ef602SBjørn Mork if (ctx->data != ctx->control) 92119694ac8SAlexey Orishko usb_driver_release_interface(driver, ctx->data); 922900d495aSAlexey Orishko error: 923900d495aSAlexey Orishko cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 924900d495aSAlexey Orishko dev->data[0] = 0; 925296e81f8SBjørn Mork dev_info(&intf->dev, "bind() failure\n"); 926900d495aSAlexey Orishko return -ENODEV; 927900d495aSAlexey Orishko } 928c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 929900d495aSAlexey Orishko 930c91ce3b6SBjørn Mork void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 931900d495aSAlexey Orishko { 932900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 93319694ac8SAlexey Orishko struct usb_driver *driver = driver_of(intf); 934900d495aSAlexey Orishko 935900d495aSAlexey Orishko if (ctx == NULL) 936900d495aSAlexey Orishko return; /* no setup */ 937900d495aSAlexey Orishko 938c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 1); 939c84ff1d6SAlexey Orishko 940c84ff1d6SAlexey Orishko if (hrtimer_active(&ctx->tx_timer)) 941c84ff1d6SAlexey Orishko hrtimer_cancel(&ctx->tx_timer); 942c84ff1d6SAlexey Orishko 943c84ff1d6SAlexey Orishko tasklet_kill(&ctx->bh); 944c84ff1d6SAlexey Orishko 945bbc8d922SBjørn Mork /* handle devices with combined control and data interface */ 946bbc8d922SBjørn Mork if (ctx->control == ctx->data) 947bbc8d922SBjørn Mork ctx->data = NULL; 948bbc8d922SBjørn Mork 94919694ac8SAlexey Orishko /* disconnect master --> disconnect slave */ 95019694ac8SAlexey Orishko if (intf == ctx->control && ctx->data) { 951900d495aSAlexey Orishko usb_set_intfdata(ctx->data, NULL); 952900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->data); 95319694ac8SAlexey Orishko ctx->data = NULL; 954900d495aSAlexey Orishko 95519694ac8SAlexey Orishko } else if (intf == ctx->data && ctx->control) { 95619694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 957900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->control); 95819694ac8SAlexey Orishko ctx->control = NULL; 959900d495aSAlexey Orishko } 960900d495aSAlexey Orishko 9613e515665SBjørn Mork usb_set_intfdata(intf, NULL); 962900d495aSAlexey Orishko cdc_ncm_free(ctx); 963900d495aSAlexey Orishko } 964c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 965900d495aSAlexey Orishko 96650a0ffafSBjørn Mork /* Return the number of the MBIM control interface altsetting iff it 96750a0ffafSBjørn Mork * is preferred and available, 9681e8bbe6cSBjørn Mork */ 96950a0ffafSBjørn Mork u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 97038396e4cSGreg Suarez { 9711e8bbe6cSBjørn Mork struct usb_host_interface *alt; 97238396e4cSGreg Suarez 973bd329e12SBjørn Mork /* The MBIM spec defines a NCM compatible default altsetting, 974bd329e12SBjørn Mork * which we may have matched: 975bd329e12SBjørn Mork * 976bd329e12SBjørn Mork * "Functions that implement both NCM 1.0 and MBIM (an 977bd329e12SBjørn Mork * “NCM/MBIM function”) according to this recommendation 978bd329e12SBjørn Mork * shall provide two alternate settings for the 979bd329e12SBjørn Mork * Communication Interface. Alternate setting 0, and the 980bd329e12SBjørn Mork * associated class and endpoint descriptors, shall be 981bd329e12SBjørn Mork * constructed according to the rules given for the 982bd329e12SBjørn Mork * Communication Interface in section 5 of [USBNCM10]. 983bd329e12SBjørn Mork * Alternate setting 1, and the associated class and 984bd329e12SBjørn Mork * endpoint descriptors, shall be constructed according to 985bd329e12SBjørn Mork * the rules given in section 6 (USB Device Model) of this 986bd329e12SBjørn Mork * specification." 987bd329e12SBjørn Mork */ 98850a0ffafSBjørn Mork if (intf->num_altsetting < 2) 98950a0ffafSBjørn Mork return intf->cur_altsetting->desc.bAlternateSetting; 99050a0ffafSBjørn Mork 99150a0ffafSBjørn Mork if (prefer_mbim) { 9921e8bbe6cSBjørn Mork alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 99350a0ffafSBjørn Mork if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 99450a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_MBIM; 9951e8bbe6cSBjørn Mork } 99650a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_NCM; 9971e8bbe6cSBjørn Mork } 9981e8bbe6cSBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 9991e8bbe6cSBjørn Mork 10001e8bbe6cSBjørn Mork static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 10011e8bbe6cSBjørn Mork { 10021e8bbe6cSBjørn Mork /* MBIM backwards compatible function? */ 100350a0ffafSBjørn Mork if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 1004bd329e12SBjørn Mork return -ENODEV; 1005bd329e12SBjørn Mork 10064a0e3e98SEnrico Mioso /* The NCM data altsetting is fixed, so we hard-coded it. 10074a0e3e98SEnrico Mioso * Additionally, generic NCM devices are assumed to accept arbitrarily 10084a0e3e98SEnrico Mioso * placed NDP. 10094a0e3e98SEnrico Mioso */ 10104d06dd53SBjørn Mork return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 101138396e4cSGreg Suarez } 101238396e4cSGreg Suarez 1013c78b7c58SBjørn Mork static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 1014900d495aSAlexey Orishko { 1015c78b7c58SBjørn Mork size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 1016c78b7c58SBjørn Mork 1017c78b7c58SBjørn Mork if (skb->len + align > max) 1018c78b7c58SBjørn Mork align = max - skb->len; 1019c78b7c58SBjørn Mork if (align && skb_tailroom(skb) >= align) 1020b080db58SJohannes Berg skb_put_zero(skb, align); 1021c78b7c58SBjørn Mork } 1022c78b7c58SBjørn Mork 1023c78b7c58SBjørn Mork /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 1024c78b7c58SBjørn Mork * allocating a new one within skb 1025c78b7c58SBjørn Mork */ 1026c78b7c58SBjørn Mork static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 1027c78b7c58SBjørn Mork { 1028c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 1029c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 1030c78b7c58SBjørn Mork size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 1031c78b7c58SBjørn Mork 10324a0e3e98SEnrico Mioso /* If NDP should be moved to the end of the NCM package, we can't follow the 10334a0e3e98SEnrico Mioso * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 10344a0e3e98SEnrico Mioso * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 10354a0e3e98SEnrico Mioso */ 1036f8c0cfa5SBjørn Mork if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 10374a0e3e98SEnrico Mioso if (ctx->delayed_ndp16->dwSignature == sign) 10384a0e3e98SEnrico Mioso return ctx->delayed_ndp16; 10394a0e3e98SEnrico Mioso 1040f8c0cfa5SBjørn Mork /* We can only push a single NDP to the end. Return 1041f8c0cfa5SBjørn Mork * NULL to send what we've already got and queue this 1042f8c0cfa5SBjørn Mork * skb for later. 1043f8c0cfa5SBjørn Mork */ 1044f8c0cfa5SBjørn Mork else if (ctx->delayed_ndp16->dwSignature) 1045f8c0cfa5SBjørn Mork return NULL; 1046f8c0cfa5SBjørn Mork } 1047f8c0cfa5SBjørn Mork 1048c78b7c58SBjørn Mork /* follow the chain of NDPs, looking for a match */ 1049c78b7c58SBjørn Mork while (ndpoffset) { 1050c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 1051c78b7c58SBjørn Mork if (ndp16->dwSignature == sign) 1052c78b7c58SBjørn Mork return ndp16; 1053c78b7c58SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1054c78b7c58SBjørn Mork } 1055c78b7c58SBjørn Mork 1056c78b7c58SBjørn Mork /* align new NDP */ 10574a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1058c78b7c58SBjørn Mork cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); 1059c78b7c58SBjørn Mork 1060c78b7c58SBjørn Mork /* verify that there is room for the NDP and the datagram (reserve) */ 106170559b89SBjørn Mork if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) 1062c78b7c58SBjørn Mork return NULL; 1063c78b7c58SBjørn Mork 1064c78b7c58SBjørn Mork /* link to it */ 1065c78b7c58SBjørn Mork if (ndp16) 1066c78b7c58SBjørn Mork ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 1067c78b7c58SBjørn Mork else 1068c78b7c58SBjørn Mork nth16->wNdpIndex = cpu_to_le16(skb->len); 1069c78b7c58SBjørn Mork 1070c78b7c58SBjørn Mork /* push a new empty NDP */ 10714a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 107270559b89SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); 10734a0e3e98SEnrico Mioso else 10744a0e3e98SEnrico Mioso ndp16 = ctx->delayed_ndp16; 10754a0e3e98SEnrico Mioso 1076c78b7c58SBjørn Mork ndp16->dwSignature = sign; 1077c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 1078c78b7c58SBjørn Mork return ndp16; 1079900d495aSAlexey Orishko } 1080900d495aSAlexey Orishko 1081c91ce3b6SBjørn Mork struct sk_buff * 1082bed6f762SBjørn Mork cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 1083900d495aSAlexey Orishko { 1084bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1085c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16; 1086c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1087900d495aSAlexey Orishko struct sk_buff *skb_out; 1088c78b7c58SBjørn Mork u16 n = 0, index, ndplen; 108984e77a8bSAlexey Orishko u8 ready2send = 0; 10904a0e3e98SEnrico Mioso u32 delayed_ndp_size; 1091aeca3a77SJim Baxter size_t padding_count; 10924a0e3e98SEnrico Mioso 10934a0e3e98SEnrico Mioso /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 10944a0e3e98SEnrico Mioso * accordingly. Otherwise, we should check here. 10954a0e3e98SEnrico Mioso */ 10964a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 10974a0e3e98SEnrico Mioso delayed_ndp_size = ctx->max_ndp_size; 10984a0e3e98SEnrico Mioso else 10994a0e3e98SEnrico Mioso delayed_ndp_size = 0; 1100900d495aSAlexey Orishko 1101900d495aSAlexey Orishko /* if there is a remaining skb, it gets priority */ 1102c78b7c58SBjørn Mork if (skb != NULL) { 1103900d495aSAlexey Orishko swap(skb, ctx->tx_rem_skb); 1104c78b7c58SBjørn Mork swap(sign, ctx->tx_rem_sign); 1105c78b7c58SBjørn Mork } else { 110684e77a8bSAlexey Orishko ready2send = 1; 1107c78b7c58SBjørn Mork } 1108900d495aSAlexey Orishko 1109900d495aSAlexey Orishko /* check if we are resuming an OUT skb */ 1110900d495aSAlexey Orishko skb_out = ctx->tx_curr_skb; 1111900d495aSAlexey Orishko 1112c78b7c58SBjørn Mork /* allocate a new OUT skb */ 1113c78b7c58SBjørn Mork if (!skb_out) { 111420572226SBjørn Mork skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); 1115900d495aSAlexey Orishko if (skb_out == NULL) { 1116900d495aSAlexey Orishko if (skb != NULL) { 1117900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1118bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1119900d495aSAlexey Orishko } 1120900d495aSAlexey Orishko goto exit_no_skb; 1121900d495aSAlexey Orishko } 1122c78b7c58SBjørn Mork /* fill out the initial 16-bit NTB header */ 1123c78b7c58SBjørn 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)); 1124c78b7c58SBjørn Mork nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 1125c78b7c58SBjørn Mork nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 1126c78b7c58SBjørn Mork nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 1127900d495aSAlexey Orishko 1128c78b7c58SBjørn Mork /* count total number of frames in this NTB */ 1129900d495aSAlexey Orishko ctx->tx_curr_frame_num = 0; 1130beeecd42SBjørn Mork 1131beeecd42SBjørn Mork /* recent payload counter for this skb_out */ 1132beeecd42SBjørn Mork ctx->tx_curr_frame_payload = 0; 1133900d495aSAlexey Orishko } 1134900d495aSAlexey Orishko 1135c78b7c58SBjørn Mork for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1136c78b7c58SBjørn Mork /* send any remaining skb first */ 1137900d495aSAlexey Orishko if (skb == NULL) { 1138900d495aSAlexey Orishko skb = ctx->tx_rem_skb; 1139c78b7c58SBjørn Mork sign = ctx->tx_rem_sign; 1140900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 1141900d495aSAlexey Orishko 1142900d495aSAlexey Orishko /* check for end of skb */ 1143900d495aSAlexey Orishko if (skb == NULL) 1144900d495aSAlexey Orishko break; 1145900d495aSAlexey Orishko } 1146900d495aSAlexey Orishko 1147c78b7c58SBjørn Mork /* get the appropriate NDP for this skb */ 1148c78b7c58SBjørn Mork ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1149c78b7c58SBjørn Mork 1150c78b7c58SBjørn Mork /* align beginning of next frame */ 1151c78b7c58SBjørn Mork cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); 1152c78b7c58SBjørn Mork 1153c78b7c58SBjørn Mork /* check if we had enough room left for both NDP and frame */ 11544a0e3e98SEnrico Mioso if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { 1155900d495aSAlexey Orishko if (n == 0) { 1156900d495aSAlexey Orishko /* won't fit, MTU problem? */ 1157900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1158900d495aSAlexey Orishko skb = NULL; 1159bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1160900d495aSAlexey Orishko } else { 1161900d495aSAlexey Orishko /* no room for skb - store for later */ 1162900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 1163900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 1164bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1165900d495aSAlexey Orishko } 1166900d495aSAlexey Orishko ctx->tx_rem_skb = skb; 1167c78b7c58SBjørn Mork ctx->tx_rem_sign = sign; 1168900d495aSAlexey Orishko skb = NULL; 116984e77a8bSAlexey Orishko ready2send = 1; 1170beeecd42SBjørn Mork ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1171900d495aSAlexey Orishko } 1172900d495aSAlexey Orishko break; 1173900d495aSAlexey Orishko } 1174900d495aSAlexey Orishko 1175c78b7c58SBjørn Mork /* calculate frame number withing this NDP */ 1176c78b7c58SBjørn Mork ndplen = le16_to_cpu(ndp16->wLength); 1177c78b7c58SBjørn Mork index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1178900d495aSAlexey Orishko 1179c78b7c58SBjørn Mork /* OK, add this skb */ 1180c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 1181c78b7c58SBjørn Mork ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 1182c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 118359ae1d12SJohannes Berg skb_put_data(skb_out, skb->data, skb->len); 1184beeecd42SBjørn Mork ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1185900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1186900d495aSAlexey Orishko skb = NULL; 1187c78b7c58SBjørn Mork 1188c78b7c58SBjørn Mork /* send now if this NDP is full */ 1189c78b7c58SBjørn Mork if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1190c78b7c58SBjørn Mork ready2send = 1; 1191beeecd42SBjørn Mork ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1192c78b7c58SBjørn Mork break; 1193c78b7c58SBjørn Mork } 1194900d495aSAlexey Orishko } 1195900d495aSAlexey Orishko 1196900d495aSAlexey Orishko /* free up any dangling skb */ 1197900d495aSAlexey Orishko if (skb != NULL) { 1198900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1199900d495aSAlexey Orishko skb = NULL; 1200bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1201900d495aSAlexey Orishko } 1202900d495aSAlexey Orishko 1203900d495aSAlexey Orishko ctx->tx_curr_frame_num = n; 1204900d495aSAlexey Orishko 1205900d495aSAlexey Orishko if (n == 0) { 1206900d495aSAlexey Orishko /* wait for more frames */ 1207900d495aSAlexey Orishko /* push variables */ 1208900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1209900d495aSAlexey Orishko goto exit_no_skb; 1210900d495aSAlexey Orishko 12116c4e548fSBjørn Mork } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1212900d495aSAlexey Orishko /* wait for more frames */ 1213900d495aSAlexey Orishko /* push variables */ 1214900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1215900d495aSAlexey Orishko /* set the pending count */ 1216900d495aSAlexey Orishko if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1217c84ff1d6SAlexey Orishko ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1218900d495aSAlexey Orishko goto exit_no_skb; 1219900d495aSAlexey Orishko 1220900d495aSAlexey Orishko } else { 1221beeecd42SBjørn Mork if (n == ctx->tx_max_datagrams) 1222beeecd42SBjørn Mork ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1223900d495aSAlexey Orishko /* frame goes out */ 1224900d495aSAlexey Orishko /* variables will be reset at next call */ 1225900d495aSAlexey Orishko } 1226900d495aSAlexey Orishko 12274a0e3e98SEnrico Mioso /* If requested, put NDP at end of frame. */ 12284a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 12294a0e3e98SEnrico Mioso nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 12304a0e3e98SEnrico Mioso cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); 12314a0e3e98SEnrico Mioso nth16->wNdpIndex = cpu_to_le16(skb_out->len); 123259ae1d12SJohannes Berg skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size); 12334a0e3e98SEnrico Mioso 12344a0e3e98SEnrico Mioso /* Zero out delayed NDP - signature checking will naturally fail. */ 12354a0e3e98SEnrico Mioso ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 12364a0e3e98SEnrico Mioso } 12374a0e3e98SEnrico Mioso 123843e4c6dfSBjørn Mork /* If collected data size is less or equal ctx->min_tx_pkt 123920572226SBjørn Mork * bytes, we send buffers as it is. If we get more data, it 124020572226SBjørn Mork * would be more efficient for USB HS mobile device with DMA 124120572226SBjørn Mork * engine to receive a full size NTB, than canceling DMA 124220572226SBjørn Mork * transfer and receiving a short packet. 12434d619f62SBjørn Mork * 12444d619f62SBjørn Mork * This optimization support is pointless if we end up sending 12454d619f62SBjørn Mork * a ZLP after full sized NTBs. 1246900d495aSAlexey Orishko */ 12474d619f62SBjørn Mork if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 1248aeca3a77SJim Baxter skb_out->len > ctx->min_tx_pkt) { 1249aeca3a77SJim Baxter padding_count = ctx->tx_max - skb_out->len; 1250b080db58SJohannes Berg skb_put_zero(skb_out, padding_count); 1251aeca3a77SJim Baxter } else if (skb_out->len < ctx->tx_max && 1252aeca3a77SJim Baxter (skb_out->len % dev->maxpacket) == 0) { 1253634fef61SJohannes Berg skb_put_u8(skb_out, 0); /* force short packet */ 1254aeca3a77SJim Baxter } 1255900d495aSAlexey Orishko 1256c78b7c58SBjørn Mork /* set final frame length */ 1257c78b7c58SBjørn Mork nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 1258c78b7c58SBjørn Mork nth16->wBlockLength = cpu_to_le16(skb_out->len); 1259900d495aSAlexey Orishko 1260900d495aSAlexey Orishko /* return skb */ 1261900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 1262beeecd42SBjørn Mork 1263beeecd42SBjørn Mork /* keep private stats: framing overhead and number of NTBs */ 1264beeecd42SBjørn Mork ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1265beeecd42SBjørn Mork ctx->tx_ntbs++; 1266beeecd42SBjørn Mork 12677a1e890eSBen Hutchings /* usbnet will count all the framing overhead by default. 1268beeecd42SBjørn Mork * Adjust the stats so that the tx_bytes counter show real 1269beeecd42SBjørn Mork * payload data instead. 1270beeecd42SBjørn Mork */ 12717a1e890eSBen Hutchings usbnet_set_skb_tx_stats(skb_out, n, 127244f6731dSBjørn Mork (long)ctx->tx_curr_frame_payload - skb_out->len); 12731e9e39f4SBen Hutchings 1274900d495aSAlexey Orishko return skb_out; 1275900d495aSAlexey Orishko 1276900d495aSAlexey Orishko exit_no_skb: 1277046c6594SBjørn Mork /* Start timer, if there is a remaining non-empty skb */ 1278046c6594SBjørn Mork if (ctx->tx_curr_skb != NULL && n > 0) 1279c84ff1d6SAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1280900d495aSAlexey Orishko return NULL; 1281900d495aSAlexey Orishko } 1282c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1283900d495aSAlexey Orishko 1284900d495aSAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1285900d495aSAlexey Orishko { 1286900d495aSAlexey Orishko /* start timer, if not already started */ 1287c84ff1d6SAlexey Orishko if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1288c84ff1d6SAlexey Orishko hrtimer_start(&ctx->tx_timer, 12898b0e1953SThomas Gleixner ctx->timer_interval, 1290c84ff1d6SAlexey Orishko HRTIMER_MODE_REL); 1291900d495aSAlexey Orishko } 1292900d495aSAlexey Orishko 1293c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1294900d495aSAlexey Orishko { 1295c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = 1296c84ff1d6SAlexey Orishko container_of(timer, struct cdc_ncm_ctx, tx_timer); 1297900d495aSAlexey Orishko 1298c84ff1d6SAlexey Orishko if (!atomic_read(&ctx->stop)) 1299c84ff1d6SAlexey Orishko tasklet_schedule(&ctx->bh); 1300c84ff1d6SAlexey Orishko return HRTIMER_NORESTART; 1301c84ff1d6SAlexey Orishko } 1302c84ff1d6SAlexey Orishko 1303c84ff1d6SAlexey Orishko static void cdc_ncm_txpath_bh(unsigned long param) 1304c84ff1d6SAlexey Orishko { 1305bed6f762SBjørn Mork struct usbnet *dev = (struct usbnet *)param; 1306bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1307c84ff1d6SAlexey Orishko 1308c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 1309900d495aSAlexey Orishko if (ctx->tx_timer_pending != 0) { 1310900d495aSAlexey Orishko ctx->tx_timer_pending--; 1311900d495aSAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1312c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1313bed6f762SBjørn Mork } else if (dev->net != NULL) { 1314beeecd42SBjørn Mork ctx->tx_reason_timeout++; /* count reason for transmitting */ 1315c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1316bed6f762SBjørn Mork netif_tx_lock_bh(dev->net); 1317bed6f762SBjørn Mork usbnet_start_xmit(NULL, dev->net); 1318bed6f762SBjørn Mork netif_tx_unlock_bh(dev->net); 13197b1e0cbaSBjørn Mork } else { 13207b1e0cbaSBjørn Mork spin_unlock_bh(&ctx->mtx); 1321900d495aSAlexey Orishko } 1322f742aa8aSAlexey Orishko } 1323900d495aSAlexey Orishko 13242f69702cSEnrico Mioso struct sk_buff * 1325900d495aSAlexey Orishko cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1326900d495aSAlexey Orishko { 1327900d495aSAlexey Orishko struct sk_buff *skb_out; 1328900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1329900d495aSAlexey Orishko 1330900d495aSAlexey Orishko /* 1331900d495aSAlexey Orishko * The Ethernet API we are using does not support transmitting 1332900d495aSAlexey Orishko * multiple Ethernet frames in a single call. This driver will 1333900d495aSAlexey Orishko * accumulate multiple Ethernet frames and send out a larger 1334900d495aSAlexey Orishko * USB frame when the USB buffer is full or when a single jiffies 1335900d495aSAlexey Orishko * timeout happens. 1336900d495aSAlexey Orishko */ 1337900d495aSAlexey Orishko if (ctx == NULL) 1338900d495aSAlexey Orishko goto error; 1339900d495aSAlexey Orishko 1340c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 1341bed6f762SBjørn Mork skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 1342c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1343900d495aSAlexey Orishko return skb_out; 1344900d495aSAlexey Orishko 1345900d495aSAlexey Orishko error: 1346900d495aSAlexey Orishko if (skb != NULL) 1347900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1348900d495aSAlexey Orishko 1349900d495aSAlexey Orishko return NULL; 1350900d495aSAlexey Orishko } 13512f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1352900d495aSAlexey Orishko 1353ff06ab13SBjørn Mork /* verify NTB header and return offset of first NDP, or negative error */ 1354c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1355900d495aSAlexey Orishko { 1356ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1357d5ddb4a5SAlexey Orishko struct usb_cdc_ncm_nth16 *nth16; 1358ff06ab13SBjørn Mork int len; 1359ff06ab13SBjørn Mork int ret = -EINVAL; 1360900d495aSAlexey Orishko 1361900d495aSAlexey Orishko if (ctx == NULL) 1362900d495aSAlexey Orishko goto error; 1363900d495aSAlexey Orishko 1364d5ddb4a5SAlexey Orishko if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1365d5ddb4a5SAlexey Orishko sizeof(struct usb_cdc_ncm_ndp16))) { 1366ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1367900d495aSAlexey Orishko goto error; 1368900d495aSAlexey Orishko } 1369900d495aSAlexey Orishko 1370d5ddb4a5SAlexey Orishko nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1371900d495aSAlexey Orishko 1372986e10d6SBjørn Mork if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 13735448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 13745448d75fSBjørn Mork "invalid NTH16 signature <%#010x>\n", 1375d5ddb4a5SAlexey Orishko le32_to_cpu(nth16->dwSignature)); 1376900d495aSAlexey Orishko goto error; 1377900d495aSAlexey Orishko } 1378900d495aSAlexey Orishko 1379d5ddb4a5SAlexey Orishko len = le16_to_cpu(nth16->wBlockLength); 1380d5ddb4a5SAlexey Orishko if (len > ctx->rx_max) { 1381ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1382ae223cd4SBjørn Mork "unsupported NTB block length %u/%u\n", len, 1383d5ddb4a5SAlexey Orishko ctx->rx_max); 1384900d495aSAlexey Orishko goto error; 1385900d495aSAlexey Orishko } 1386900d495aSAlexey Orishko 1387d5ddb4a5SAlexey Orishko if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1388d5ddb4a5SAlexey Orishko (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1389d5ddb4a5SAlexey Orishko !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1390ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1391ae223cd4SBjørn Mork "sequence number glitch prev=%d curr=%d\n", 1392d5ddb4a5SAlexey Orishko ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1393d5ddb4a5SAlexey Orishko } 1394d5ddb4a5SAlexey Orishko ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1395d5ddb4a5SAlexey Orishko 1396ff06ab13SBjørn Mork ret = le16_to_cpu(nth16->wNdpIndex); 1397ff06ab13SBjørn Mork error: 1398ff06ab13SBjørn Mork return ret; 1399ff06ab13SBjørn Mork } 1400c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1401ff06ab13SBjørn Mork 1402ff06ab13SBjørn Mork /* verify NDP header and return number of datagrams, or negative error */ 1403c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1404ff06ab13SBjørn Mork { 1405ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1406ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1407ff06ab13SBjørn Mork int ret = -EINVAL; 1408ff06ab13SBjørn Mork 140975d67d35SBjørn Mork if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1410ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1411ae223cd4SBjørn Mork ndpoffset); 1412900d495aSAlexey Orishko goto error; 1413900d495aSAlexey Orishko } 141475d67d35SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1415900d495aSAlexey Orishko 1416ff06ab13SBjørn Mork if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1417ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1418a26fd05dSBjørn Mork le16_to_cpu(ndp16->wLength)); 1419ff06ab13SBjørn Mork goto error; 1420ff06ab13SBjørn Mork } 1421ff06ab13SBjørn Mork 1422ff06ab13SBjørn Mork ret = ((le16_to_cpu(ndp16->wLength) - 1423ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_ndp16)) / 1424ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_dpe16)); 1425ff06ab13SBjørn Mork ret--; /* we process NDP entries except for the last one */ 1426ff06ab13SBjørn Mork 1427ae223cd4SBjørn Mork if ((sizeof(struct usb_cdc_ncm_ndp16) + 1428ae223cd4SBjørn Mork ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1429ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1430ff06ab13SBjørn Mork ret = -EINVAL; 1431ff06ab13SBjørn Mork } 1432ff06ab13SBjørn Mork 1433ff06ab13SBjørn Mork error: 1434ff06ab13SBjørn Mork return ret; 1435ff06ab13SBjørn Mork } 1436c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1437ff06ab13SBjørn Mork 14382f69702cSEnrico Mioso int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1439ff06ab13SBjørn Mork { 1440ff06ab13SBjørn Mork struct sk_buff *skb; 1441ff06ab13SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1442ff06ab13SBjørn Mork int len; 1443ff06ab13SBjørn Mork int nframes; 1444ff06ab13SBjørn Mork int x; 1445ff06ab13SBjørn Mork int offset; 1446ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1447ff06ab13SBjørn Mork struct usb_cdc_ncm_dpe16 *dpe16; 1448ff06ab13SBjørn Mork int ndpoffset; 1449ff06ab13SBjørn Mork int loopcount = 50; /* arbitrary max preventing infinite loop */ 1450beeecd42SBjørn Mork u32 payload = 0; 1451ff06ab13SBjørn Mork 1452ff06ab13SBjørn Mork ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 1453ff06ab13SBjørn Mork if (ndpoffset < 0) 1454ff06ab13SBjørn Mork goto error; 1455ff06ab13SBjørn Mork 1456ff06ab13SBjørn Mork next_ndp: 1457ff06ab13SBjørn Mork nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1458ff06ab13SBjørn Mork if (nframes < 0) 1459ff06ab13SBjørn Mork goto error; 1460ff06ab13SBjørn Mork 1461ff06ab13SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1462ff06ab13SBjørn Mork 1463986e10d6SBjørn Mork if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 14645448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 14655448d75fSBjørn Mork "invalid DPT16 signature <%#010x>\n", 1466d5ddb4a5SAlexey Orishko le32_to_cpu(ndp16->dwSignature)); 146775d67d35SBjørn Mork goto err_ndp; 1468900d495aSAlexey Orishko } 1469ff06ab13SBjørn Mork dpe16 = ndp16->dpe16; 1470900d495aSAlexey Orishko 1471d5ddb4a5SAlexey Orishko for (x = 0; x < nframes; x++, dpe16++) { 1472d5ddb4a5SAlexey Orishko offset = le16_to_cpu(dpe16->wDatagramIndex); 1473d5ddb4a5SAlexey Orishko len = le16_to_cpu(dpe16->wDatagramLength); 1474900d495aSAlexey Orishko 1475900d495aSAlexey Orishko /* 1476900d495aSAlexey Orishko * CDC NCM ch. 3.7 1477900d495aSAlexey Orishko * All entries after first NULL entry are to be ignored 1478900d495aSAlexey Orishko */ 1479d5ddb4a5SAlexey Orishko if ((offset == 0) || (len == 0)) { 1480900d495aSAlexey Orishko if (!x) 148175d67d35SBjørn Mork goto err_ndp; /* empty NTB */ 1482900d495aSAlexey Orishko break; 1483900d495aSAlexey Orishko } 1484900d495aSAlexey Orishko 1485900d495aSAlexey Orishko /* sanity checking */ 1486d5ddb4a5SAlexey Orishko if (((offset + len) > skb_in->len) || 1487d5ddb4a5SAlexey Orishko (len > ctx->rx_max) || (len < ETH_HLEN)) { 1488ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1489ae223cd4SBjørn Mork "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1490d5ddb4a5SAlexey Orishko x, offset, len, skb_in); 1491900d495aSAlexey Orishko if (!x) 149275d67d35SBjørn Mork goto err_ndp; 1493900d495aSAlexey Orishko break; 1494900d495aSAlexey Orishko 1495900d495aSAlexey Orishko } else { 14961e2c6117SBjørn Mork /* create a fresh copy to reduce truesize */ 14971e2c6117SBjørn Mork skb = netdev_alloc_skb_ip_align(dev->net, len); 14989e56790aSJesper Juhl if (!skb) 14999e56790aSJesper Juhl goto error; 150059ae1d12SJohannes Berg skb_put_data(skb, skb_in->data + offset, len); 1501900d495aSAlexey Orishko usbnet_skb_return(dev, skb); 1502beeecd42SBjørn Mork payload += len; /* count payload bytes in this NTB */ 1503900d495aSAlexey Orishko } 1504900d495aSAlexey Orishko } 150575d67d35SBjørn Mork err_ndp: 150675d67d35SBjørn Mork /* are there more NDPs to process? */ 150775d67d35SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 150875d67d35SBjørn Mork if (ndpoffset && loopcount--) 150975d67d35SBjørn Mork goto next_ndp; 151075d67d35SBjørn Mork 1511beeecd42SBjørn Mork /* update stats */ 1512beeecd42SBjørn Mork ctx->rx_overhead += skb_in->len - payload; 1513beeecd42SBjørn Mork ctx->rx_ntbs++; 1514beeecd42SBjørn Mork 1515900d495aSAlexey Orishko return 1; 1516900d495aSAlexey Orishko error: 1517900d495aSAlexey Orishko return 0; 1518900d495aSAlexey Orishko } 15192f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1520900d495aSAlexey Orishko 1521900d495aSAlexey Orishko static void 1522bed6f762SBjørn Mork cdc_ncm_speed_change(struct usbnet *dev, 152384e77a8bSAlexey Orishko struct usb_cdc_speed_change *data) 1524900d495aSAlexey Orishko { 152584e77a8bSAlexey Orishko uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); 152684e77a8bSAlexey Orishko uint32_t tx_speed = le32_to_cpu(data->ULBitRate); 1527900d495aSAlexey Orishko 1528900d495aSAlexey Orishko /* 1529900d495aSAlexey Orishko * Currently the USB-NET API does not support reporting the actual 1530900d495aSAlexey Orishko * device speed. Do print it instead. 1531900d495aSAlexey Orishko */ 1532900d495aSAlexey Orishko if ((tx_speed > 1000000) && (rx_speed > 1000000)) { 1533ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1534ae223cd4SBjørn Mork "%u mbit/s downlink %u mbit/s uplink\n", 1535900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000000U), 1536900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000000U)); 1537900d495aSAlexey Orishko } else { 1538ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1539ae223cd4SBjørn Mork "%u kbit/s downlink %u kbit/s uplink\n", 1540900d495aSAlexey Orishko (unsigned int)(rx_speed / 1000U), 1541900d495aSAlexey Orishko (unsigned int)(tx_speed / 1000U)); 1542900d495aSAlexey Orishko } 1543900d495aSAlexey Orishko } 1544900d495aSAlexey Orishko 1545900d495aSAlexey Orishko static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1546900d495aSAlexey Orishko { 1547900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 1548900d495aSAlexey Orishko struct usb_cdc_notification *event; 1549900d495aSAlexey Orishko 1550900d495aSAlexey Orishko ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1551900d495aSAlexey Orishko 1552900d495aSAlexey Orishko if (urb->actual_length < sizeof(*event)) 1553900d495aSAlexey Orishko return; 1554900d495aSAlexey Orishko 1555900d495aSAlexey Orishko /* test for split data in 8-byte chunks */ 1556900d495aSAlexey Orishko if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1557bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 155884e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)urb->transfer_buffer); 1559900d495aSAlexey Orishko return; 1560900d495aSAlexey Orishko } 1561900d495aSAlexey Orishko 1562900d495aSAlexey Orishko event = urb->transfer_buffer; 1563900d495aSAlexey Orishko 1564900d495aSAlexey Orishko switch (event->bNotificationType) { 1565900d495aSAlexey Orishko case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1566900d495aSAlexey Orishko /* 1567900d495aSAlexey Orishko * According to the CDC NCM specification ch.7.1 1568900d495aSAlexey Orishko * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1569900d495aSAlexey Orishko * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1570900d495aSAlexey Orishko */ 1571ae223cd4SBjørn Mork netif_info(dev, link, dev->net, 1572ae223cd4SBjørn Mork "network connection: %sconnected\n", 1573fa83dbeeSBjørn Mork !!event->wValue ? "" : "dis"); 1574fa83dbeeSBjørn Mork usbnet_link_change(dev, !!event->wValue, 0); 1575900d495aSAlexey Orishko break; 1576900d495aSAlexey Orishko 1577900d495aSAlexey Orishko case USB_CDC_NOTIFY_SPEED_CHANGE: 157884e77a8bSAlexey Orishko if (urb->actual_length < (sizeof(*event) + 157984e77a8bSAlexey Orishko sizeof(struct usb_cdc_speed_change))) 1580900d495aSAlexey Orishko set_bit(EVENT_STS_SPLIT, &dev->flags); 1581900d495aSAlexey Orishko else 1582bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 158384e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)&event[1]); 1584900d495aSAlexey Orishko break; 1585900d495aSAlexey Orishko 1586900d495aSAlexey Orishko default: 158767a36606SBjørn Mork dev_dbg(&dev->udev->dev, 158867a36606SBjørn Mork "NCM: unexpected notification 0x%02x!\n", 158967a36606SBjørn Mork event->bNotificationType); 1590900d495aSAlexey Orishko break; 1591900d495aSAlexey Orishko } 1592900d495aSAlexey Orishko } 1593900d495aSAlexey Orishko 1594900d495aSAlexey Orishko static const struct driver_info cdc_ncm_info = { 1595900d495aSAlexey Orishko .description = "CDC NCM", 15964d06dd53SBjørn Mork .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 15974d06dd53SBjørn Mork | FLAG_LINK_INTR, 1598900d495aSAlexey Orishko .bind = cdc_ncm_bind, 1599900d495aSAlexey Orishko .unbind = cdc_ncm_unbind, 1600a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1601900d495aSAlexey Orishko .status = cdc_ncm_status, 1602900d495aSAlexey Orishko .rx_fixup = cdc_ncm_rx_fixup, 1603900d495aSAlexey Orishko .tx_fixup = cdc_ncm_tx_fixup, 1604900d495aSAlexey Orishko }; 1605900d495aSAlexey Orishko 1606f94898eaSDan Williams /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1607f94898eaSDan Williams static const struct driver_info wwan_info = { 1608f94898eaSDan Williams .description = "Mobile Broadband Network Device", 1609f94898eaSDan Williams .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 16104d06dd53SBjørn Mork | FLAG_LINK_INTR | FLAG_WWAN, 1611f94898eaSDan Williams .bind = cdc_ncm_bind, 1612f94898eaSDan Williams .unbind = cdc_ncm_unbind, 1613a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1614f94898eaSDan Williams .status = cdc_ncm_status, 1615f94898eaSDan Williams .rx_fixup = cdc_ncm_rx_fixup, 1616f94898eaSDan Williams .tx_fixup = cdc_ncm_tx_fixup, 1617f94898eaSDan Williams }; 1618f94898eaSDan Williams 16192f62d5aaSWei Shuai /* Same as wwan_info, but with FLAG_NOARP */ 16202f62d5aaSWei Shuai static const struct driver_info wwan_noarp_info = { 16212f62d5aaSWei Shuai .description = "Mobile Broadband Network Device (NO ARP)", 16222f62d5aaSWei Shuai .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 16234d06dd53SBjørn Mork | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, 16242f62d5aaSWei Shuai .bind = cdc_ncm_bind, 16252f62d5aaSWei Shuai .unbind = cdc_ncm_unbind, 16262f62d5aaSWei Shuai .manage_power = usbnet_manage_power, 16272f62d5aaSWei Shuai .status = cdc_ncm_status, 16282f62d5aaSWei Shuai .rx_fixup = cdc_ncm_rx_fixup, 16292f62d5aaSWei Shuai .tx_fixup = cdc_ncm_tx_fixup, 16302f62d5aaSWei Shuai }; 16312f62d5aaSWei Shuai 1632f94898eaSDan Williams static const struct usb_device_id cdc_devs[] = { 1633f94898eaSDan Williams /* Ericsson MBM devices like F5521gw */ 1634f94898eaSDan Williams { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1635f94898eaSDan Williams | USB_DEVICE_ID_MATCH_VENDOR, 1636f94898eaSDan Williams .idVendor = 0x0bdb, 1637f94898eaSDan Williams .bInterfaceClass = USB_CLASS_COMM, 1638f94898eaSDan Williams .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1639f94898eaSDan Williams .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1640f94898eaSDan Williams .driver_info = (unsigned long) &wwan_info, 1641f94898eaSDan Williams }, 1642f94898eaSDan Williams 164379f42232SDaniele Palmas /* Telit LE910 V2 */ 164479f42232SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, 164579f42232SDaniele Palmas USB_CLASS_COMM, 164679f42232SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 164779f42232SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 164879f42232SDaniele Palmas }, 164979f42232SDaniele Palmas 1650670c0d62SDaniele Palmas /* DW5812 LTE Verizon Mobile Broadband Card 1651670c0d62SDaniele Palmas * Unlike DW5550 this device requires FLAG_NOARP 1652670c0d62SDaniele Palmas */ 1653670c0d62SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, 1654670c0d62SDaniele Palmas USB_CLASS_COMM, 1655670c0d62SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1656670c0d62SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 1657670c0d62SDaniele Palmas }, 1658670c0d62SDaniele Palmas 1659fb83d5f2SDaniele Palmas /* DW5813 LTE AT&T Mobile Broadband Card 1660fb83d5f2SDaniele Palmas * Unlike DW5550 this device requires FLAG_NOARP 1661fb83d5f2SDaniele Palmas */ 1662fb83d5f2SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, 1663fb83d5f2SDaniele Palmas USB_CLASS_COMM, 1664fb83d5f2SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1665fb83d5f2SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 1666fb83d5f2SDaniele Palmas }, 1667fb83d5f2SDaniele Palmas 1668f3a1ef9cSPeter Meiser /* Dell branded MBM devices like DW5550 */ 1669f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1670f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1671f3a1ef9cSPeter Meiser .idVendor = 0x413c, 1672f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1673f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1674f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1675f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1676f3a1ef9cSPeter Meiser }, 1677f3a1ef9cSPeter Meiser 1678f3a1ef9cSPeter Meiser /* Toshiba branded MBM devices */ 1679f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1680f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1681f3a1ef9cSPeter Meiser .idVendor = 0x0930, 1682f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1683f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1684f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1685f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1686f3a1ef9cSPeter Meiser }, 1687f3a1ef9cSPeter Meiser 16881f84eab4SBjørn Mork /* tag Huawei devices as wwan */ 16891f84eab4SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 16901f84eab4SBjørn Mork USB_CLASS_COMM, 16911f84eab4SBjørn Mork USB_CDC_SUBCLASS_NCM, 16921f84eab4SBjørn Mork USB_CDC_PROTO_NONE), 16931f84eab4SBjørn Mork .driver_info = (unsigned long)&wwan_info, 16941f84eab4SBjørn Mork }, 16951f84eab4SBjørn Mork 16962f62d5aaSWei Shuai /* Infineon(now Intel) HSPA Modem platform */ 16972f62d5aaSWei Shuai { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 16982f62d5aaSWei Shuai USB_CLASS_COMM, 16992f62d5aaSWei Shuai USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 17002f62d5aaSWei Shuai .driver_info = (unsigned long)&wwan_noarp_info, 17012f62d5aaSWei Shuai }, 17022f62d5aaSWei Shuai 1703f94898eaSDan Williams /* Generic CDC-NCM devices */ 1704f94898eaSDan Williams { USB_INTERFACE_INFO(USB_CLASS_COMM, 1705f94898eaSDan Williams USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1706f94898eaSDan Williams .driver_info = (unsigned long)&cdc_ncm_info, 1707f94898eaSDan Williams }, 1708f94898eaSDan Williams { 1709f94898eaSDan Williams }, 1710f94898eaSDan Williams }; 1711f94898eaSDan Williams MODULE_DEVICE_TABLE(usb, cdc_devs); 1712f94898eaSDan Williams 1713900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver = { 1714900d495aSAlexey Orishko .name = "cdc_ncm", 1715900d495aSAlexey Orishko .id_table = cdc_devs, 1716085e50e1SBjørn Mork .probe = usbnet_probe, 1717085e50e1SBjørn Mork .disconnect = usbnet_disconnect, 1718900d495aSAlexey Orishko .suspend = usbnet_suspend, 1719900d495aSAlexey Orishko .resume = usbnet_resume, 172085e3c65fSStefan Metzmacher .reset_resume = usbnet_resume, 1721900d495aSAlexey Orishko .supports_autosuspend = 1, 1722e1f12eb6SSarah Sharp .disable_hub_initiated_lpm = 1, 1723900d495aSAlexey Orishko }; 1724900d495aSAlexey Orishko 1725d632eb1bSGreg Kroah-Hartman module_usb_driver(cdc_ncm_driver); 1726900d495aSAlexey Orishko 1727900d495aSAlexey Orishko MODULE_AUTHOR("Hans Petter Selasky"); 1728900d495aSAlexey Orishko MODULE_DESCRIPTION("USB CDC NCM host driver"); 1729900d495aSAlexey Orishko MODULE_LICENSE("Dual BSD/GPL"); 1730