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 61d61e4038SJoe Perches module_param(prefer_mbim, bool, 0644); 621e8bbe6cSBjørn Mork MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); 631e8bbe6cSBjørn Mork 644f4e5436SEmil Renner Berthing static void cdc_ncm_txpath_bh(struct tasklet_struct *t); 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 92e1069bbfSJim Baxter #define CDC_NCM_LOW_MEM_MAX_CNT 10 93e1069bbfSJim Baxter 94beeecd42SBjørn Mork static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) 95beeecd42SBjørn Mork { 96beeecd42SBjørn Mork switch (sset) { 97beeecd42SBjørn Mork case ETH_SS_STATS: 98beeecd42SBjørn Mork return ARRAY_SIZE(cdc_ncm_gstrings_stats); 99beeecd42SBjørn Mork default: 100beeecd42SBjørn Mork return -EOPNOTSUPP; 101beeecd42SBjørn Mork } 102beeecd42SBjørn Mork } 103beeecd42SBjørn Mork 104beeecd42SBjørn Mork static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, 105beeecd42SBjørn Mork struct ethtool_stats __always_unused *stats, 106beeecd42SBjørn Mork u64 *data) 107beeecd42SBjørn Mork { 108beeecd42SBjørn Mork struct usbnet *dev = netdev_priv(netdev); 109beeecd42SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 110beeecd42SBjørn Mork int i; 111beeecd42SBjørn Mork char *p = NULL; 112beeecd42SBjørn Mork 113beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 114beeecd42SBjørn Mork p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; 115beeecd42SBjørn Mork data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; 116beeecd42SBjørn Mork } 117beeecd42SBjørn Mork } 118beeecd42SBjørn Mork 119beeecd42SBjørn Mork static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) 120beeecd42SBjørn Mork { 121beeecd42SBjørn Mork u8 *p = data; 122beeecd42SBjørn Mork int i; 123beeecd42SBjørn Mork 124beeecd42SBjørn Mork switch (stringset) { 125beeecd42SBjørn Mork case ETH_SS_STATS: 126beeecd42SBjørn Mork for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { 127beeecd42SBjørn Mork memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); 128beeecd42SBjørn Mork p += ETH_GSTRING_LEN; 129beeecd42SBjørn Mork } 130beeecd42SBjørn Mork } 131beeecd42SBjørn Mork } 132beeecd42SBjørn Mork 1336c4e548fSBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); 1346c4e548fSBjørn Mork 1356c4e548fSBjørn Mork static const struct ethtool_ops cdc_ncm_ethtool_ops = { 1366c4e548fSBjørn Mork .get_link = usbnet_get_link, 1376c4e548fSBjørn Mork .nway_reset = usbnet_nway_reset, 1386c4e548fSBjørn Mork .get_drvinfo = usbnet_get_drvinfo, 1396c4e548fSBjørn Mork .get_msglevel = usbnet_get_msglevel, 1406c4e548fSBjørn Mork .set_msglevel = usbnet_set_msglevel, 1416c4e548fSBjørn Mork .get_ts_info = ethtool_op_get_ts_info, 142beeecd42SBjørn Mork .get_sset_count = cdc_ncm_get_sset_count, 143beeecd42SBjørn Mork .get_strings = cdc_ncm_get_strings, 144beeecd42SBjørn Mork .get_ethtool_stats = cdc_ncm_get_ethtool_stats, 145*eb47c274SOliver Neukum .get_link_ksettings = usbnet_get_link_ksettings_internal, 146*eb47c274SOliver Neukum .set_link_ksettings = NULL, 1476c4e548fSBjørn Mork }; 1486c4e548fSBjørn Mork 149289507d3SBjørn Mork static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) 1505aa73d5dSBjørn Mork { 1515aa73d5dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1525aa73d5dSBjørn Mork u32 val, max, min; 1535aa73d5dSBjørn Mork 1545aa73d5dSBjørn Mork /* clamp new_rx to sane values */ 1555aa73d5dSBjørn Mork min = USB_CDC_NCM_NTB_MIN_IN_SIZE; 1565aa73d5dSBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 1575aa73d5dSBjørn Mork 1585aa73d5dSBjørn Mork /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ 1595aa73d5dSBjørn Mork if (max < min) { 1605aa73d5dSBjørn Mork dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", 1615aa73d5dSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); 1625aa73d5dSBjørn Mork max = min; 1635aa73d5dSBjørn Mork } 1645aa73d5dSBjørn Mork 1655aa73d5dSBjørn Mork val = clamp_t(u32, new_rx, min, max); 166289507d3SBjørn Mork if (val != new_rx) 167289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); 168289507d3SBjørn Mork 169289507d3SBjørn Mork return val; 1705aa73d5dSBjørn Mork } 1715aa73d5dSBjørn Mork 172289507d3SBjørn Mork static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) 173289507d3SBjørn Mork { 174289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 175289507d3SBjørn Mork u32 val, max, min; 176289507d3SBjørn Mork 177289507d3SBjørn Mork /* clamp new_tx to sane values */ 1780fa81b30SAlexander Bersenev if (ctx->is_ndp16) 179289507d3SBjørn Mork min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); 1800fa81b30SAlexander Bersenev else 1810fa81b30SAlexander Bersenev min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth32); 1820fa81b30SAlexander Bersenev 183289507d3SBjørn Mork max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 184289507d3SBjørn Mork 185289507d3SBjørn Mork /* some devices set dwNtbOutMaxSize too low for the above default */ 186289507d3SBjørn Mork min = min(min, max); 187289507d3SBjørn Mork 188289507d3SBjørn Mork val = clamp_t(u32, new_tx, min, max); 189289507d3SBjørn Mork if (val != new_tx) 190289507d3SBjørn Mork dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); 191289507d3SBjørn Mork 192289507d3SBjørn Mork return val; 193289507d3SBjørn Mork } 194289507d3SBjørn Mork 19539eb7e0eSBjørn Mork static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) 19639eb7e0eSBjørn Mork { 19739eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 19839eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 19939eb7e0eSBjørn Mork 20039eb7e0eSBjørn Mork return sprintf(buf, "%u\n", ctx->min_tx_pkt); 20139eb7e0eSBjørn Mork } 20239eb7e0eSBjørn Mork 203289507d3SBjørn Mork static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) 204289507d3SBjørn Mork { 205289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 206289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 207289507d3SBjørn Mork 208289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->rx_max); 209289507d3SBjørn Mork } 210289507d3SBjørn Mork 211289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) 212289507d3SBjørn Mork { 213289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 214289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 215289507d3SBjørn Mork 216289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->tx_max); 217289507d3SBjørn Mork } 218289507d3SBjørn Mork 219289507d3SBjørn Mork static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) 220289507d3SBjørn Mork { 221289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 222289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 223289507d3SBjørn Mork 224289507d3SBjørn Mork return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); 225289507d3SBjørn Mork } 226289507d3SBjørn Mork 22739eb7e0eSBjørn Mork static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 22839eb7e0eSBjørn Mork { 22939eb7e0eSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 23039eb7e0eSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 23139eb7e0eSBjørn Mork unsigned long val; 23239eb7e0eSBjørn Mork 23339eb7e0eSBjørn Mork /* no need to restrict values - anything from 0 to infinity is OK */ 23439eb7e0eSBjørn Mork if (kstrtoul(buf, 0, &val)) 23539eb7e0eSBjørn Mork return -EINVAL; 23639eb7e0eSBjørn Mork 23739eb7e0eSBjørn Mork ctx->min_tx_pkt = val; 23839eb7e0eSBjørn Mork return len; 23939eb7e0eSBjørn Mork } 24039eb7e0eSBjørn Mork 241289507d3SBjørn Mork static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 242289507d3SBjørn Mork { 243289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 244289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 245289507d3SBjørn Mork unsigned long val; 246289507d3SBjørn Mork 247289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) 248289507d3SBjørn Mork return -EINVAL; 249289507d3SBjørn Mork 250289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); 251289507d3SBjørn Mork return len; 252289507d3SBjørn Mork } 253289507d3SBjørn Mork 254289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 255289507d3SBjørn Mork { 256289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 257289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 258289507d3SBjørn Mork unsigned long val; 259289507d3SBjørn Mork 260289507d3SBjørn Mork if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) 261289507d3SBjørn Mork return -EINVAL; 262289507d3SBjørn Mork 263289507d3SBjørn Mork cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); 264289507d3SBjørn Mork return len; 265289507d3SBjørn Mork } 266289507d3SBjørn Mork 267289507d3SBjørn Mork static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 268289507d3SBjørn Mork { 269289507d3SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 270289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 271289507d3SBjørn Mork ssize_t ret; 272289507d3SBjørn Mork unsigned long val; 273289507d3SBjørn Mork 274289507d3SBjørn Mork ret = kstrtoul(buf, 0, &val); 275289507d3SBjørn Mork if (ret) 276289507d3SBjørn Mork return ret; 277289507d3SBjørn Mork if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) 278289507d3SBjørn Mork return -EINVAL; 279289507d3SBjørn Mork 280289507d3SBjørn Mork spin_lock_bh(&ctx->mtx); 281289507d3SBjørn Mork ctx->timer_interval = val * NSEC_PER_USEC; 282289507d3SBjørn Mork if (!ctx->timer_interval) 283289507d3SBjørn Mork ctx->tx_timer_pending = 0; 284289507d3SBjørn Mork spin_unlock_bh(&ctx->mtx); 285289507d3SBjørn Mork return len; 286289507d3SBjørn Mork } 287289507d3SBjørn Mork 288d61e4038SJoe Perches static DEVICE_ATTR(min_tx_pkt, 0644, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); 289d61e4038SJoe Perches static DEVICE_ATTR(rx_max, 0644, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); 290d61e4038SJoe Perches static DEVICE_ATTR(tx_max, 0644, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); 291d61e4038SJoe Perches static DEVICE_ATTR(tx_timer_usecs, 0644, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); 292289507d3SBjørn Mork 293404814afSBjørn Mork static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) 294404814afSBjørn Mork { 295404814afSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 296404814afSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 297404814afSBjørn Mork 298404814afSBjørn Mork return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); 299404814afSBjørn Mork } 300404814afSBjørn Mork 301404814afSBjørn Mork static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) 302404814afSBjørn Mork { 303404814afSBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); 304404814afSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 305404814afSBjørn Mork bool enable; 306404814afSBjørn Mork 307404814afSBjørn Mork if (strtobool(buf, &enable)) 308404814afSBjørn Mork return -EINVAL; 309404814afSBjørn Mork 310404814afSBjørn Mork /* no change? */ 311404814afSBjørn Mork if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 312404814afSBjørn Mork return len; 313404814afSBjørn Mork 3140fa81b30SAlexander Bersenev if (enable) { 3150fa81b30SAlexander Bersenev if (ctx->is_ndp16 && !ctx->delayed_ndp16) { 316404814afSBjørn Mork ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 317404814afSBjørn Mork if (!ctx->delayed_ndp16) 318404814afSBjørn Mork return -ENOMEM; 319404814afSBjørn Mork } 3200fa81b30SAlexander Bersenev if (!ctx->is_ndp16 && !ctx->delayed_ndp32) { 3210fa81b30SAlexander Bersenev ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 3220fa81b30SAlexander Bersenev if (!ctx->delayed_ndp32) 3230fa81b30SAlexander Bersenev return -ENOMEM; 3240fa81b30SAlexander Bersenev } 3250fa81b30SAlexander Bersenev } 326404814afSBjørn Mork 327404814afSBjørn Mork /* flush pending data before changing flag */ 328404814afSBjørn Mork netif_tx_lock_bh(dev->net); 329404814afSBjørn Mork usbnet_start_xmit(NULL, dev->net); 330404814afSBjørn Mork spin_lock_bh(&ctx->mtx); 331404814afSBjørn Mork if (enable) 332404814afSBjørn Mork ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; 333404814afSBjørn Mork else 334404814afSBjørn Mork ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; 335404814afSBjørn Mork spin_unlock_bh(&ctx->mtx); 336404814afSBjørn Mork netif_tx_unlock_bh(dev->net); 337404814afSBjørn Mork 338404814afSBjørn Mork return len; 339404814afSBjørn Mork } 340404814afSBjørn Mork static DEVICE_ATTR_RW(ndp_to_end); 341404814afSBjørn Mork 342871578c9SBjørn Mork #define NCM_PARM_ATTR(name, format, tocpu) \ 343871578c9SBjørn Mork static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ 344871578c9SBjørn Mork { \ 345871578c9SBjørn Mork struct usbnet *dev = netdev_priv(to_net_dev(d)); \ 346871578c9SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ 347871578c9SBjørn Mork return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ 348871578c9SBjørn Mork } \ 349d61e4038SJoe Perches static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL) 350871578c9SBjørn Mork 351871578c9SBjørn Mork NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); 352871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 353871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); 354871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); 355871578c9SBjørn Mork NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); 356871578c9SBjørn Mork NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); 357871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); 358871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); 359871578c9SBjørn Mork NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); 360871578c9SBjørn Mork NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); 361871578c9SBjørn Mork 362289507d3SBjørn Mork static struct attribute *cdc_ncm_sysfs_attrs[] = { 36339eb7e0eSBjørn Mork &dev_attr_min_tx_pkt.attr, 364404814afSBjørn Mork &dev_attr_ndp_to_end.attr, 365289507d3SBjørn Mork &dev_attr_rx_max.attr, 366289507d3SBjørn Mork &dev_attr_tx_max.attr, 367289507d3SBjørn Mork &dev_attr_tx_timer_usecs.attr, 368871578c9SBjørn Mork &dev_attr_bmNtbFormatsSupported.attr, 369871578c9SBjørn Mork &dev_attr_dwNtbInMaxSize.attr, 370871578c9SBjørn Mork &dev_attr_wNdpInDivisor.attr, 371871578c9SBjørn Mork &dev_attr_wNdpInPayloadRemainder.attr, 372871578c9SBjørn Mork &dev_attr_wNdpInAlignment.attr, 373871578c9SBjørn Mork &dev_attr_dwNtbOutMaxSize.attr, 374871578c9SBjørn Mork &dev_attr_wNdpOutDivisor.attr, 375871578c9SBjørn Mork &dev_attr_wNdpOutPayloadRemainder.attr, 376871578c9SBjørn Mork &dev_attr_wNdpOutAlignment.attr, 377871578c9SBjørn Mork &dev_attr_wNtbOutMaxDatagrams.attr, 378289507d3SBjørn Mork NULL, 379289507d3SBjørn Mork }; 380289507d3SBjørn Mork 38143f51ef1SArvind Yadav static const struct attribute_group cdc_ncm_sysfs_attr_group = { 382289507d3SBjørn Mork .name = "cdc_ncm", 383289507d3SBjørn Mork .attrs = cdc_ncm_sysfs_attrs, 384289507d3SBjørn Mork }; 385289507d3SBjørn Mork 386289507d3SBjørn Mork /* handle rx_max and tx_max changes */ 387289507d3SBjørn Mork static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) 388289507d3SBjørn Mork { 389289507d3SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 390289507d3SBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 391289507d3SBjørn Mork u32 val; 392289507d3SBjørn Mork 393289507d3SBjørn Mork val = cdc_ncm_check_rx_max(dev, new_rx); 394289507d3SBjørn Mork 3955aa73d5dSBjørn Mork /* inform device about NTB input size changes */ 3965aa73d5dSBjørn Mork if (val != ctx->rx_max) { 3975aa73d5dSBjørn Mork __le32 dwNtbInMaxSize = cpu_to_le32(val); 3985aa73d5dSBjørn Mork 3995aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); 40068864abfSBjørn Mork 40168864abfSBjørn Mork /* tell device to use new size */ 4025aa73d5dSBjørn Mork if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, 4035aa73d5dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 4045aa73d5dSBjørn Mork | USB_RECIP_INTERFACE, 4055aa73d5dSBjørn Mork 0, iface_no, &dwNtbInMaxSize, 4) < 0) 4065aa73d5dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); 4075aa73d5dSBjørn Mork else 4085aa73d5dSBjørn Mork ctx->rx_max = val; 4095aa73d5dSBjørn Mork } 4105aa73d5dSBjørn Mork 411f42763dbSBjørn Mork /* usbnet use these values for sizing rx queues */ 412f42763dbSBjørn Mork if (dev->rx_urb_size != ctx->rx_max) { 413f42763dbSBjørn Mork dev->rx_urb_size = ctx->rx_max; 414f42763dbSBjørn Mork if (netif_running(dev->net)) 415f42763dbSBjørn Mork usbnet_unlink_rx_urbs(dev); 416f42763dbSBjørn Mork } 417f42763dbSBjørn Mork 418289507d3SBjørn Mork val = cdc_ncm_check_tx_max(dev, new_tx); 4195aa73d5dSBjørn Mork if (val != ctx->tx_max) 4205aa73d5dSBjørn Mork dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); 42108c74fc9SBjørn Mork 42208c74fc9SBjørn Mork /* Adding a pad byte here if necessary simplifies the handling 42308c74fc9SBjørn Mork * in cdc_ncm_fill_tx_frame, making tx_max always represent 42408c74fc9SBjørn Mork * the real skb max size. 42508c74fc9SBjørn Mork * 42608c74fc9SBjørn Mork * We cannot use dev->maxpacket here because this is called from 42708c74fc9SBjørn Mork * .bind which is called before usbnet sets up dev->maxpacket 42808c74fc9SBjørn Mork */ 42968864abfSBjørn Mork if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && 43068864abfSBjørn Mork val % usb_maxpacket(dev->udev, dev->out, 1) == 0) 43168864abfSBjørn Mork val++; 43208c74fc9SBjørn Mork 43368864abfSBjørn Mork /* we might need to flush any pending tx buffers if running */ 43468864abfSBjørn Mork if (netif_running(dev->net) && val > ctx->tx_max) { 43568864abfSBjørn Mork netif_tx_lock_bh(dev->net); 43668864abfSBjørn Mork usbnet_start_xmit(NULL, dev->net); 4371ba5d0ffSBjørn Mork /* make sure tx_curr_skb is reallocated if it was empty */ 4381ba5d0ffSBjørn Mork if (ctx->tx_curr_skb) { 4391ba5d0ffSBjørn Mork dev_kfree_skb_any(ctx->tx_curr_skb); 4401ba5d0ffSBjørn Mork ctx->tx_curr_skb = NULL; 4411ba5d0ffSBjørn Mork } 44268864abfSBjørn Mork ctx->tx_max = val; 44368864abfSBjørn Mork netif_tx_unlock_bh(dev->net); 44468864abfSBjørn Mork } else { 44568864abfSBjørn Mork ctx->tx_max = val; 44668864abfSBjørn Mork } 44768864abfSBjørn Mork 44808c74fc9SBjørn Mork dev->hard_mtu = ctx->tx_max; 44968864abfSBjørn Mork 45068864abfSBjørn Mork /* max qlen depend on hard_mtu and rx_urb_size */ 45168864abfSBjørn Mork usbnet_update_max_qlen(dev); 45243e4c6dfSBjørn Mork 45343e4c6dfSBjørn Mork /* never pad more than 3 full USB packets per transfer */ 45443e4c6dfSBjørn Mork ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), 45543e4c6dfSBjørn Mork CDC_NCM_MIN_TX_PKT, ctx->tx_max); 4565aa73d5dSBjørn Mork } 4575aa73d5dSBjørn Mork 458f8afb73dSBjørn Mork /* helpers for NCM and MBIM differences */ 459f8afb73dSBjørn Mork static u8 cdc_ncm_flags(struct usbnet *dev) 460900d495aSAlexey Orishko { 461bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 462900d495aSAlexey Orishko 463f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 464f8afb73dSBjørn Mork return ctx->mbim_desc->bmNetworkCapabilities; 465f8afb73dSBjørn Mork if (ctx->func_desc) 466f8afb73dSBjørn Mork return ctx->func_desc->bmNetworkCapabilities; 467f8afb73dSBjørn Mork return 0; 468f8afb73dSBjørn Mork } 469f8afb73dSBjørn Mork 470f8afb73dSBjørn Mork static int cdc_ncm_eth_hlen(struct usbnet *dev) 471f8afb73dSBjørn Mork { 472f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 473f8afb73dSBjørn Mork return 0; 474f8afb73dSBjørn Mork return ETH_HLEN; 475f8afb73dSBjørn Mork } 476f8afb73dSBjørn Mork 477f8afb73dSBjørn Mork static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) 478f8afb73dSBjørn Mork { 479f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) 480f8afb73dSBjørn Mork return CDC_MBIM_MIN_DATAGRAM_SIZE; 481f8afb73dSBjørn Mork return CDC_NCM_MIN_DATAGRAM_SIZE; 482f8afb73dSBjørn Mork } 483f8afb73dSBjørn Mork 484f8afb73dSBjørn Mork static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) 485f8afb73dSBjørn Mork { 486f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 487f8afb73dSBjørn Mork 488f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) 489f8afb73dSBjørn Mork return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); 490f8afb73dSBjørn Mork if (ctx->ether_desc) 491f8afb73dSBjørn Mork return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); 492f8afb73dSBjørn Mork return CDC_NCM_MAX_DATAGRAM_SIZE; 493f8afb73dSBjørn Mork } 494f8afb73dSBjørn Mork 495f8afb73dSBjørn Mork /* initial one-time device setup. MUST be called with the data interface 496f8afb73dSBjørn Mork * in altsetting 0 497f8afb73dSBjørn Mork */ 498f8afb73dSBjørn Mork static int cdc_ncm_init(struct usbnet *dev) 499f8afb73dSBjørn Mork { 500f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 501f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 502f8afb73dSBjørn Mork int err; 503900d495aSAlexey Orishko 50490b8b037SMing Lei err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, 50536c35416SGiuseppe Scrivano USB_TYPE_CLASS | USB_DIR_IN 50636c35416SGiuseppe Scrivano |USB_RECIP_INTERFACE, 507ff0992e9SBjørn Mork 0, iface_no, &ctx->ncm_parm, 508ff0992e9SBjørn Mork sizeof(ctx->ncm_parm)); 50936c35416SGiuseppe Scrivano if (err < 0) { 51059ede316SBjørn Mork dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); 51159ede316SBjørn Mork return err; /* GET_NTB_PARAMETERS is required */ 512900d495aSAlexey Orishko } 513900d495aSAlexey Orishko 514f8afb73dSBjørn Mork /* set CRC Mode */ 515f8afb73dSBjørn Mork if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { 516f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); 517f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, 518f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 519f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 520f8afb73dSBjørn Mork USB_CDC_NCM_CRC_NOT_APPENDED, 521f8afb73dSBjørn Mork iface_no, NULL, 0); 522f8afb73dSBjørn Mork if (err < 0) 523f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); 524f8afb73dSBjørn Mork } 525f8afb73dSBjørn Mork 5260fa81b30SAlexander Bersenev /* use ndp16 by default */ 5270fa81b30SAlexander Bersenev ctx->is_ndp16 = 1; 5280fa81b30SAlexander Bersenev 529f8afb73dSBjørn Mork /* set NTB format, if both formats are supported. 530f8afb73dSBjørn Mork * 531f8afb73dSBjørn Mork * "The host shall only send this command while the NCM Data 532f8afb73dSBjørn Mork * Interface is in alternate setting 0." 533f8afb73dSBjørn Mork */ 534d22adbfbSDan Carpenter if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & 535d22adbfbSDan Carpenter USB_CDC_NCM_NTB32_SUPPORTED) { 5360fa81b30SAlexander Bersenev if (ctx->drvflags & CDC_NCM_FLAG_PREFER_NTB32) { 5370fa81b30SAlexander Bersenev ctx->is_ndp16 = 0; 5380fa81b30SAlexander Bersenev dev_dbg(&dev->intf->dev, "Setting NTB format to 32-bit\n"); 5390fa81b30SAlexander Bersenev err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 5400fa81b30SAlexander Bersenev USB_TYPE_CLASS | USB_DIR_OUT 5410fa81b30SAlexander Bersenev | USB_RECIP_INTERFACE, 5420fa81b30SAlexander Bersenev USB_CDC_NCM_NTB32_FORMAT, 5430fa81b30SAlexander Bersenev iface_no, NULL, 0); 5440fa81b30SAlexander Bersenev } else { 5450fa81b30SAlexander Bersenev ctx->is_ndp16 = 1; 546f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); 547f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, 548f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT 549f8afb73dSBjørn Mork | USB_RECIP_INTERFACE, 550f8afb73dSBjørn Mork USB_CDC_NCM_NTB16_FORMAT, 551f8afb73dSBjørn Mork iface_no, NULL, 0); 5520fa81b30SAlexander Bersenev } 5530fa81b30SAlexander Bersenev if (err < 0) { 5540fa81b30SAlexander Bersenev ctx->is_ndp16 = 1; 555f8afb73dSBjørn Mork dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); 556f8afb73dSBjørn Mork } 5570fa81b30SAlexander Bersenev } 558f8afb73dSBjørn Mork 559f8afb73dSBjørn Mork /* set initial device values */ 560ff0992e9SBjørn Mork ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); 561ff0992e9SBjørn Mork ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); 562ff0992e9SBjørn Mork ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); 563ff0992e9SBjørn Mork ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); 564ff0992e9SBjørn Mork ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); 56584e77a8bSAlexey Orishko /* devices prior to NCM Errata shall set this field to zero */ 566ff0992e9SBjørn Mork ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); 56747175e5fSBjørn Mork 568ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, 569ae223cd4SBjørn Mork "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", 570900d495aSAlexey Orishko ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, 571f8afb73dSBjørn Mork ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); 572900d495aSAlexey Orishko 57384e77a8bSAlexey Orishko /* max count of tx datagrams */ 57484e77a8bSAlexey Orishko if ((ctx->tx_max_datagrams == 0) || 57584e77a8bSAlexey Orishko (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) 576900d495aSAlexey Orishko ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; 577900d495aSAlexey Orishko 57870559b89SBjørn Mork /* set up maximum NDP size */ 5790fa81b30SAlexander Bersenev if (ctx->is_ndp16) 58070559b89SBjørn Mork ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); 5810fa81b30SAlexander Bersenev else 5820fa81b30SAlexander Bersenev ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp32) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe32); 58370559b89SBjørn Mork 5846c4e548fSBjørn Mork /* initial coalescing timer interval */ 5856c4e548fSBjørn Mork ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; 5866c4e548fSBjørn Mork 587f8afb73dSBjørn Mork return 0; 588f8afb73dSBjørn Mork } 589f8afb73dSBjørn Mork 590f8afb73dSBjørn Mork /* set a new max datagram size */ 591f8afb73dSBjørn Mork static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) 592f8afb73dSBjørn Mork { 593f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 594f8afb73dSBjørn Mork u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; 595f8afb73dSBjørn Mork __le16 max_datagram_size; 596f8afb73dSBjørn Mork u16 mbim_mtu; 597f8afb73dSBjørn Mork int err; 598f8afb73dSBjørn Mork 599f8afb73dSBjørn Mork /* set default based on descriptors */ 600f8afb73dSBjørn Mork ctx->max_datagram_size = clamp_t(u32, new_size, 601f8afb73dSBjørn Mork cdc_ncm_min_dgram_size(dev), 602f8afb73dSBjørn Mork CDC_NCM_MAX_DATAGRAM_SIZE); 603f8afb73dSBjørn Mork 604f8afb73dSBjørn Mork /* inform the device about the selected Max Datagram Size? */ 605f8afb73dSBjørn Mork if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) 606f8afb73dSBjørn Mork goto out; 607f8afb73dSBjørn Mork 608f8afb73dSBjørn Mork /* read current mtu value from device */ 609f8afb73dSBjørn Mork err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, 610f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, 611332f989aSOliver Neukum 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); 612a56dcc6bSDan Carpenter if (err != sizeof(max_datagram_size)) { 613f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); 614f8afb73dSBjørn Mork goto out; 615f8afb73dSBjørn Mork } 616f8afb73dSBjørn Mork 617f8afb73dSBjørn Mork if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) 618f8afb73dSBjørn Mork goto out; 619f8afb73dSBjørn Mork 620f8afb73dSBjørn Mork max_datagram_size = cpu_to_le16(ctx->max_datagram_size); 621f8afb73dSBjørn Mork err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, 622f8afb73dSBjørn Mork USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, 623332f989aSOliver Neukum 0, iface_no, &max_datagram_size, sizeof(max_datagram_size)); 624f8afb73dSBjørn Mork if (err < 0) 625f8afb73dSBjørn Mork dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); 626f8afb73dSBjørn Mork 627f8afb73dSBjørn Mork out: 628f8afb73dSBjørn Mork /* set MTU to max supported by the device if necessary */ 629f8afb73dSBjørn Mork dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); 630f8afb73dSBjørn Mork 631f8afb73dSBjørn Mork /* do not exceed operater preferred MTU */ 632f8afb73dSBjørn Mork if (ctx->mbim_extended_desc) { 633f8afb73dSBjørn Mork mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); 634f8afb73dSBjørn Mork if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) 635f8afb73dSBjørn Mork dev->net->mtu = mbim_mtu; 636f8afb73dSBjørn Mork } 637f8afb73dSBjørn Mork } 638f8afb73dSBjørn Mork 639f8afb73dSBjørn Mork static void cdc_ncm_fix_modulus(struct usbnet *dev) 640f8afb73dSBjørn Mork { 641f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 642f8afb73dSBjørn Mork u32 val; 643900d495aSAlexey Orishko 644900d495aSAlexey Orishko /* 645900d495aSAlexey Orishko * verify that the structure alignment is: 646900d495aSAlexey Orishko * - power of two 647900d495aSAlexey Orishko * - not greater than the maximum transmit length 648900d495aSAlexey Orishko * - not less than four bytes 649900d495aSAlexey Orishko */ 650900d495aSAlexey Orishko val = ctx->tx_ndp_modulus; 651900d495aSAlexey Orishko 652900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 653900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 654ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); 655900d495aSAlexey Orishko ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 656900d495aSAlexey Orishko } 657900d495aSAlexey Orishko 658900d495aSAlexey Orishko /* 659900d495aSAlexey Orishko * verify that the payload alignment is: 660900d495aSAlexey Orishko * - power of two 661900d495aSAlexey Orishko * - not greater than the maximum transmit length 662900d495aSAlexey Orishko * - not less than four bytes 663900d495aSAlexey Orishko */ 664900d495aSAlexey Orishko val = ctx->tx_modulus; 665900d495aSAlexey Orishko 666900d495aSAlexey Orishko if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || 667900d495aSAlexey Orishko (val != ((-val) & val)) || (val >= ctx->tx_max)) { 668ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); 669900d495aSAlexey Orishko ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; 670900d495aSAlexey Orishko } 671900d495aSAlexey Orishko 672900d495aSAlexey Orishko /* verify the payload remainder */ 673900d495aSAlexey Orishko if (ctx->tx_remainder >= ctx->tx_modulus) { 674ae223cd4SBjørn Mork dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); 675900d495aSAlexey Orishko ctx->tx_remainder = 0; 676900d495aSAlexey Orishko } 677900d495aSAlexey Orishko 678900d495aSAlexey Orishko /* adjust TX-remainder according to NCM specification. */ 679f8afb73dSBjørn Mork ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & 680900d495aSAlexey Orishko (ctx->tx_modulus - 1)); 68184e77a8bSAlexey Orishko } 682900d495aSAlexey Orishko 683f8afb73dSBjørn Mork static int cdc_ncm_setup(struct usbnet *dev) 684f8afb73dSBjørn Mork { 685f8afb73dSBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 68650f1cb1cSBjørn Mork u32 def_rx, def_tx; 68750f1cb1cSBjørn Mork 68850f1cb1cSBjørn Mork /* be conservative when selecting intial buffer size to 68950f1cb1cSBjørn Mork * increase the number of hosts this will work for 69050f1cb1cSBjørn Mork */ 69150f1cb1cSBjørn Mork def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, 69250f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); 69350f1cb1cSBjørn Mork def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, 69450f1cb1cSBjørn Mork le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); 69584e77a8bSAlexey Orishko 696f8afb73dSBjørn Mork /* clamp rx_max and tx_max and inform device */ 69750f1cb1cSBjørn Mork cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); 6983f658cdeSAlexey Orishko 699f8afb73dSBjørn Mork /* sanitize the modulus and remainder values */ 700f8afb73dSBjørn Mork cdc_ncm_fix_modulus(dev); 701900d495aSAlexey Orishko 702f8afb73dSBjørn Mork /* set max datagram size */ 703f8afb73dSBjørn Mork cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); 704900d495aSAlexey Orishko return 0; 705900d495aSAlexey Orishko } 706900d495aSAlexey Orishko 707900d495aSAlexey Orishko static void 708ff1632aaSBjørn Mork cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) 709900d495aSAlexey Orishko { 710ff1632aaSBjørn Mork struct usb_host_endpoint *e, *in = NULL, *out = NULL; 711900d495aSAlexey Orishko u8 ep; 712900d495aSAlexey Orishko 713900d495aSAlexey Orishko for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { 714900d495aSAlexey Orishko e = intf->cur_altsetting->endpoint + ep; 7153fe4b335SBjørn Mork 7163fe4b335SBjørn Mork /* ignore endpoints which cannot transfer data */ 7173fe4b335SBjørn Mork if (!usb_endpoint_maxp(&e->desc)) 7183fe4b335SBjørn Mork continue; 7193fe4b335SBjørn Mork 720900d495aSAlexey Orishko switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 721900d495aSAlexey Orishko case USB_ENDPOINT_XFER_INT: 722900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 723ff1632aaSBjørn Mork if (!dev->status) 724ff1632aaSBjørn Mork dev->status = e; 725900d495aSAlexey Orishko } 726900d495aSAlexey Orishko break; 727900d495aSAlexey Orishko 728900d495aSAlexey Orishko case USB_ENDPOINT_XFER_BULK: 729900d495aSAlexey Orishko if (usb_endpoint_dir_in(&e->desc)) { 730ff1632aaSBjørn Mork if (!in) 731ff1632aaSBjørn Mork in = e; 732900d495aSAlexey Orishko } else { 733ff1632aaSBjørn Mork if (!out) 734ff1632aaSBjørn Mork out = e; 735900d495aSAlexey Orishko } 736900d495aSAlexey Orishko break; 737900d495aSAlexey Orishko 738900d495aSAlexey Orishko default: 739900d495aSAlexey Orishko break; 740900d495aSAlexey Orishko } 741900d495aSAlexey Orishko } 742ff1632aaSBjørn Mork if (in && !dev->in) 743ff1632aaSBjørn Mork dev->in = usb_rcvbulkpipe(dev->udev, 744ff1632aaSBjørn Mork in->desc.bEndpointAddress & 745ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 746ff1632aaSBjørn Mork if (out && !dev->out) 747ff1632aaSBjørn Mork dev->out = usb_sndbulkpipe(dev->udev, 748ff1632aaSBjørn Mork out->desc.bEndpointAddress & 749ff1632aaSBjørn Mork USB_ENDPOINT_NUMBER_MASK); 750900d495aSAlexey Orishko } 751900d495aSAlexey Orishko 752900d495aSAlexey Orishko static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) 753900d495aSAlexey Orishko { 754900d495aSAlexey Orishko if (ctx == NULL) 755900d495aSAlexey Orishko return; 756900d495aSAlexey Orishko 757900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 758900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 759900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 760900d495aSAlexey Orishko } 761900d495aSAlexey Orishko 762900d495aSAlexey Orishko if (ctx->tx_curr_skb != NULL) { 763900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_curr_skb); 764900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 765900d495aSAlexey Orishko } 766900d495aSAlexey Orishko 7670fa81b30SAlexander Bersenev if (ctx->is_ndp16) 7684a0e3e98SEnrico Mioso kfree(ctx->delayed_ndp16); 7690fa81b30SAlexander Bersenev else 7700fa81b30SAlexander Bersenev kfree(ctx->delayed_ndp32); 7714a0e3e98SEnrico Mioso 772900d495aSAlexey Orishko kfree(ctx); 773900d495aSAlexey Orishko } 774900d495aSAlexey Orishko 7751dfddff5SBjørn Mork /* we need to override the usbnet change_mtu ndo for two reasons: 7761dfddff5SBjørn Mork * - respect the negotiated maximum datagram size 7771dfddff5SBjørn Mork * - avoid unwanted changes to rx and tx buffers 7781dfddff5SBjørn Mork */ 7791dfddff5SBjørn Mork int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) 7801dfddff5SBjørn Mork { 7811dfddff5SBjørn Mork struct usbnet *dev = netdev_priv(net); 78205a56487SRafal Redzimski 7831dfddff5SBjørn Mork net->mtu = new_mtu; 78405a56487SRafal Redzimski cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); 78505a56487SRafal Redzimski 7861dfddff5SBjørn Mork return 0; 7871dfddff5SBjørn Mork } 7881dfddff5SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); 7891dfddff5SBjørn Mork 7901dfddff5SBjørn Mork static const struct net_device_ops cdc_ncm_netdev_ops = { 7911dfddff5SBjørn Mork .ndo_open = usbnet_open, 7921dfddff5SBjørn Mork .ndo_stop = usbnet_stop, 7931dfddff5SBjørn Mork .ndo_start_xmit = usbnet_start_xmit, 7941dfddff5SBjørn Mork .ndo_tx_timeout = usbnet_tx_timeout, 79537a2ebddSMiguel Rodríguez Pérez .ndo_set_rx_mode = usbnet_set_rx_mode, 796323955a0SHeiner Kallweit .ndo_get_stats64 = dev_get_tstats64, 7971dfddff5SBjørn Mork .ndo_change_mtu = cdc_ncm_change_mtu, 7981dfddff5SBjørn Mork .ndo_set_mac_address = eth_mac_addr, 7991dfddff5SBjørn Mork .ndo_validate_addr = eth_validate_addr, 8001dfddff5SBjørn Mork }; 8011dfddff5SBjørn Mork 8024a0e3e98SEnrico Mioso int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) 803900d495aSAlexey Orishko { 804900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx; 805900d495aSAlexey Orishko struct usb_driver *driver; 806900d495aSAlexey Orishko u8 *buf; 807900d495aSAlexey Orishko int len; 808900d495aSAlexey Orishko int temp; 809900d495aSAlexey Orishko u8 iface_no; 81077b0a099SOliver Neukum struct usb_cdc_parsed_header hdr; 811900d495aSAlexey Orishko 812c796984fSThomas Meyer ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 8138f0923c1SDevendra Naga if (!ctx) 8148f0923c1SDevendra Naga return -ENOMEM; 815900d495aSAlexey Orishko 8164f4e5436SEmil Renner Berthing ctx->dev = dev; 8174f4e5436SEmil Renner Berthing 818c84ff1d6SAlexey Orishko hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 819c84ff1d6SAlexey Orishko ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; 8204f4e5436SEmil Renner Berthing tasklet_setup(&ctx->bh, cdc_ncm_txpath_bh); 821c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 0); 822900d495aSAlexey Orishko spin_lock_init(&ctx->mtx); 823900d495aSAlexey Orishko 824900d495aSAlexey Orishko /* store ctx pointer in device data field */ 825900d495aSAlexey Orishko dev->data[0] = (unsigned long)ctx; 826900d495aSAlexey Orishko 8279fe0234cSBjørn Mork /* only the control interface can be successfully probed */ 8289fe0234cSBjørn Mork ctx->control = intf; 8299fe0234cSBjørn Mork 830900d495aSAlexey Orishko /* get some pointers */ 831900d495aSAlexey Orishko driver = driver_of(intf); 832900d495aSAlexey Orishko buf = intf->cur_altsetting->extra; 833900d495aSAlexey Orishko len = intf->cur_altsetting->extralen; 834900d495aSAlexey Orishko 835900d495aSAlexey Orishko /* parse through descriptors associated with control interface */ 83677b0a099SOliver Neukum cdc_parse_cdc_header(&hdr, intf, buf, len); 837900d495aSAlexey Orishko 8386527f833SBjørn Mork if (hdr.usb_cdc_union_desc) 839900d495aSAlexey Orishko ctx->data = usb_ifnum_to_if(dev->udev, 84077b0a099SOliver Neukum hdr.usb_cdc_union_desc->bSlaveInterface0); 84177b0a099SOliver Neukum ctx->ether_desc = hdr.usb_cdc_ether_desc; 84277b0a099SOliver Neukum ctx->func_desc = hdr.usb_cdc_ncm_desc; 84377b0a099SOliver Neukum ctx->mbim_desc = hdr.usb_cdc_mbim_desc; 84477b0a099SOliver Neukum ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; 845900d495aSAlexey Orishko 8469992c2e2SBjørn Mork /* some buggy devices have an IAD but no CDC Union */ 8476527f833SBjørn Mork if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { 84856a666dcSBjørn Mork ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); 84956a666dcSBjørn Mork dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); 8509992c2e2SBjørn Mork } 8519992c2e2SBjørn Mork 852900d495aSAlexey Orishko /* check if we got everything */ 853f8afb73dSBjørn Mork if (!ctx->data) { 854492bbe7fSGrant Grundler dev_err(&intf->dev, "CDC Union missing and no IAD found\n"); 855900d495aSAlexey Orishko goto error; 856296e81f8SBjørn Mork } 857f8afb73dSBjørn Mork if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { 858f8afb73dSBjørn Mork if (!ctx->mbim_desc) { 859492bbe7fSGrant Grundler dev_err(&intf->dev, "MBIM functional descriptor missing\n"); 860f8afb73dSBjørn Mork goto error; 861f8afb73dSBjørn Mork } 862f8afb73dSBjørn Mork } else { 863f8afb73dSBjørn Mork if (!ctx->ether_desc || !ctx->func_desc) { 864492bbe7fSGrant Grundler dev_err(&intf->dev, "NCM or ECM functional descriptors missing\n"); 865f8afb73dSBjørn Mork goto error; 866f8afb73dSBjørn Mork } 867f8afb73dSBjørn Mork } 868900d495aSAlexey Orishko 869bbc8d922SBjørn Mork /* claim data interface, if different from control */ 870bbc8d922SBjørn Mork if (ctx->data != ctx->control) { 871900d495aSAlexey Orishko temp = usb_driver_claim_interface(driver, ctx->data, dev); 872296e81f8SBjørn Mork if (temp) { 873492bbe7fSGrant Grundler dev_err(&intf->dev, "failed to claim data intf\n"); 874900d495aSAlexey Orishko goto error; 875bbc8d922SBjørn Mork } 876296e81f8SBjørn Mork } 877900d495aSAlexey Orishko 878900d495aSAlexey Orishko iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; 879900d495aSAlexey Orishko 8807b8076ceSDaniele Palmas /* Device-specific flags */ 8817b8076ceSDaniele Palmas ctx->drvflags = drvflags; 8827b8076ceSDaniele Palmas 88348906f62SBjørn Mork /* Reset data interface. Some devices will not reset properly 88448906f62SBjørn Mork * unless they are configured first. Toggle the altsetting to 8857b8076ceSDaniele Palmas * force a reset. 8867b8076ceSDaniele Palmas * Some other devices do not work properly with this procedure 8877b8076ceSDaniele Palmas * that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE 88848906f62SBjørn Mork */ 8897b8076ceSDaniele Palmas if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE)) 89048906f62SBjørn Mork usb_set_interface(dev->udev, iface_no, data_altsetting); 8917b8076ceSDaniele Palmas 892900d495aSAlexey Orishko temp = usb_set_interface(dev->udev, iface_no, 0); 893296e81f8SBjørn Mork if (temp) { 894296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 89519694ac8SAlexey Orishko goto error2; 896296e81f8SBjørn Mork } 897900d495aSAlexey Orishko 89808c74fc9SBjørn Mork /* initialize basic device settings */ 89908c74fc9SBjørn Mork if (cdc_ncm_init(dev)) 900ff0992e9SBjørn Mork goto error2; 901ff0992e9SBjørn Mork 902c086e709SBjørn Mork /* Some firmwares need a pause here or they will silently fail 903c086e709SBjørn Mork * to set up the interface properly. This value was decided 904c086e709SBjørn Mork * empirically on a Sierra Wireless MC7455 running 02.08.02.00 905c086e709SBjørn Mork * firmware. 906c086e709SBjørn Mork */ 907c086e709SBjørn Mork usleep_range(10000, 20000); 908c086e709SBjørn Mork 909900d495aSAlexey Orishko /* configure data interface */ 91038396e4cSGreg Suarez temp = usb_set_interface(dev->udev, iface_no, data_altsetting); 911296e81f8SBjørn Mork if (temp) { 912296e81f8SBjørn Mork dev_dbg(&intf->dev, "set interface failed\n"); 91319694ac8SAlexey Orishko goto error2; 914296e81f8SBjørn Mork } 915900d495aSAlexey Orishko 916ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->data); 917ff1632aaSBjørn Mork cdc_ncm_find_endpoints(dev, ctx->control); 918296e81f8SBjørn Mork if (!dev->in || !dev->out || !dev->status) { 919296e81f8SBjørn Mork dev_dbg(&intf->dev, "failed to collect endpoints\n"); 92019694ac8SAlexey Orishko goto error2; 921296e81f8SBjørn Mork } 922900d495aSAlexey Orishko 923900d495aSAlexey Orishko usb_set_intfdata(ctx->control, dev); 924900d495aSAlexey Orishko 92538396e4cSGreg Suarez if (ctx->ether_desc) { 926900d495aSAlexey Orishko temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); 927296e81f8SBjørn Mork if (temp) { 928492bbe7fSGrant Grundler dev_err(&intf->dev, "failed to get mac address\n"); 92919694ac8SAlexey Orishko goto error2; 930296e81f8SBjørn Mork } 931296e81f8SBjørn Mork dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); 93238396e4cSGreg Suarez } 93338396e4cSGreg Suarez 93408c74fc9SBjørn Mork /* finish setting up the device specific data */ 93508c74fc9SBjørn Mork cdc_ncm_setup(dev); 936ff0992e9SBjørn Mork 9374a0e3e98SEnrico Mioso /* Allocate the delayed NDP if needed. */ 9384a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 9390fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 9404a0e3e98SEnrico Mioso ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 9414a0e3e98SEnrico Mioso if (!ctx->delayed_ndp16) 9424a0e3e98SEnrico Mioso goto error2; 9430fa81b30SAlexander Bersenev } else { 9440fa81b30SAlexander Bersenev ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); 9450fa81b30SAlexander Bersenev if (!ctx->delayed_ndp32) 9460fa81b30SAlexander Bersenev goto error2; 9470fa81b30SAlexander Bersenev } 9484a0e3e98SEnrico Mioso dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); 9494a0e3e98SEnrico Mioso } 9504a0e3e98SEnrico Mioso 9516c4e548fSBjørn Mork /* override ethtool_ops */ 9526c4e548fSBjørn Mork dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; 9536c4e548fSBjørn Mork 954289507d3SBjørn Mork /* add our sysfs attrs */ 955289507d3SBjørn Mork dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; 956289507d3SBjørn Mork 9571dfddff5SBjørn Mork /* must handle MTU changes */ 9581dfddff5SBjørn Mork dev->net->netdev_ops = &cdc_ncm_netdev_ops; 959f77f0aeeSJarod Wilson dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); 9601dfddff5SBjørn Mork 961900d495aSAlexey Orishko return 0; 962900d495aSAlexey Orishko 96319694ac8SAlexey Orishko error2: 96419694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 96519694ac8SAlexey Orishko usb_set_intfdata(ctx->data, NULL); 9666b4ef602SBjørn Mork if (ctx->data != ctx->control) 96719694ac8SAlexey Orishko usb_driver_release_interface(driver, ctx->data); 968900d495aSAlexey Orishko error: 969900d495aSAlexey Orishko cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); 970900d495aSAlexey Orishko dev->data[0] = 0; 971296e81f8SBjørn Mork dev_info(&intf->dev, "bind() failure\n"); 972900d495aSAlexey Orishko return -ENODEV; 973900d495aSAlexey Orishko } 974c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); 975900d495aSAlexey Orishko 976c91ce3b6SBjørn Mork void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) 977900d495aSAlexey Orishko { 978900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 97919694ac8SAlexey Orishko struct usb_driver *driver = driver_of(intf); 980900d495aSAlexey Orishko 981900d495aSAlexey Orishko if (ctx == NULL) 982900d495aSAlexey Orishko return; /* no setup */ 983900d495aSAlexey Orishko 984c84ff1d6SAlexey Orishko atomic_set(&ctx->stop, 1); 985c84ff1d6SAlexey Orishko 986c84ff1d6SAlexey Orishko hrtimer_cancel(&ctx->tx_timer); 987c84ff1d6SAlexey Orishko 988c84ff1d6SAlexey Orishko tasklet_kill(&ctx->bh); 989c84ff1d6SAlexey Orishko 990bbc8d922SBjørn Mork /* handle devices with combined control and data interface */ 991bbc8d922SBjørn Mork if (ctx->control == ctx->data) 992bbc8d922SBjørn Mork ctx->data = NULL; 993bbc8d922SBjørn Mork 99419694ac8SAlexey Orishko /* disconnect master --> disconnect slave */ 99519694ac8SAlexey Orishko if (intf == ctx->control && ctx->data) { 996900d495aSAlexey Orishko usb_set_intfdata(ctx->data, NULL); 997900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->data); 99819694ac8SAlexey Orishko ctx->data = NULL; 999900d495aSAlexey Orishko 100019694ac8SAlexey Orishko } else if (intf == ctx->data && ctx->control) { 100119694ac8SAlexey Orishko usb_set_intfdata(ctx->control, NULL); 1002900d495aSAlexey Orishko usb_driver_release_interface(driver, ctx->control); 100319694ac8SAlexey Orishko ctx->control = NULL; 1004900d495aSAlexey Orishko } 1005900d495aSAlexey Orishko 10063e515665SBjørn Mork usb_set_intfdata(intf, NULL); 1007900d495aSAlexey Orishko cdc_ncm_free(ctx); 1008900d495aSAlexey Orishko } 1009c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_unbind); 1010900d495aSAlexey Orishko 101150a0ffafSBjørn Mork /* Return the number of the MBIM control interface altsetting iff it 101250a0ffafSBjørn Mork * is preferred and available, 10131e8bbe6cSBjørn Mork */ 101450a0ffafSBjørn Mork u8 cdc_ncm_select_altsetting(struct usb_interface *intf) 101538396e4cSGreg Suarez { 10161e8bbe6cSBjørn Mork struct usb_host_interface *alt; 101738396e4cSGreg Suarez 1018bd329e12SBjørn Mork /* The MBIM spec defines a NCM compatible default altsetting, 1019bd329e12SBjørn Mork * which we may have matched: 1020bd329e12SBjørn Mork * 1021bd329e12SBjørn Mork * "Functions that implement both NCM 1.0 and MBIM (an 1022bd329e12SBjørn Mork * “NCM/MBIM function”) according to this recommendation 1023bd329e12SBjørn Mork * shall provide two alternate settings for the 1024bd329e12SBjørn Mork * Communication Interface. Alternate setting 0, and the 1025bd329e12SBjørn Mork * associated class and endpoint descriptors, shall be 1026bd329e12SBjørn Mork * constructed according to the rules given for the 1027bd329e12SBjørn Mork * Communication Interface in section 5 of [USBNCM10]. 1028bd329e12SBjørn Mork * Alternate setting 1, and the associated class and 1029bd329e12SBjørn Mork * endpoint descriptors, shall be constructed according to 1030bd329e12SBjørn Mork * the rules given in section 6 (USB Device Model) of this 1031bd329e12SBjørn Mork * specification." 1032bd329e12SBjørn Mork */ 103350a0ffafSBjørn Mork if (intf->num_altsetting < 2) 103450a0ffafSBjørn Mork return intf->cur_altsetting->desc.bAlternateSetting; 103550a0ffafSBjørn Mork 103650a0ffafSBjørn Mork if (prefer_mbim) { 10371e8bbe6cSBjørn Mork alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); 103850a0ffafSBjørn Mork if (alt && cdc_ncm_comm_intf_is_mbim(alt)) 103950a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_MBIM; 10401e8bbe6cSBjørn Mork } 104150a0ffafSBjørn Mork return CDC_NCM_COMM_ALTSETTING_NCM; 10421e8bbe6cSBjørn Mork } 10431e8bbe6cSBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); 10441e8bbe6cSBjørn Mork 10451e8bbe6cSBjørn Mork static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) 10461e8bbe6cSBjørn Mork { 10471e8bbe6cSBjørn Mork /* MBIM backwards compatible function? */ 104850a0ffafSBjørn Mork if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) 1049bd329e12SBjørn Mork return -ENODEV; 1050bd329e12SBjørn Mork 10514a0e3e98SEnrico Mioso /* The NCM data altsetting is fixed, so we hard-coded it. 10524a0e3e98SEnrico Mioso * Additionally, generic NCM devices are assumed to accept arbitrarily 10534a0e3e98SEnrico Mioso * placed NDP. 10544a0e3e98SEnrico Mioso */ 10554d06dd53SBjørn Mork return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); 105638396e4cSGreg Suarez } 105738396e4cSGreg Suarez 1058c78b7c58SBjørn Mork static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) 1059900d495aSAlexey Orishko { 1060c78b7c58SBjørn Mork size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; 1061c78b7c58SBjørn Mork 1062c78b7c58SBjørn Mork if (skb->len + align > max) 1063c78b7c58SBjørn Mork align = max - skb->len; 1064c78b7c58SBjørn Mork if (align && skb_tailroom(skb) >= align) 1065b080db58SJohannes Berg skb_put_zero(skb, align); 1066c78b7c58SBjørn Mork } 1067c78b7c58SBjørn Mork 1068c78b7c58SBjørn Mork /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly 1069c78b7c58SBjørn Mork * allocating a new one within skb 1070c78b7c58SBjørn Mork */ 10710fa81b30SAlexander Bersenev static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 1072c78b7c58SBjørn Mork { 1073c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16 = NULL; 1074c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; 1075c78b7c58SBjørn Mork size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); 1076c78b7c58SBjørn Mork 10774a0e3e98SEnrico Mioso /* If NDP should be moved to the end of the NCM package, we can't follow the 10784a0e3e98SEnrico Mioso * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and 10794a0e3e98SEnrico Mioso * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 10804a0e3e98SEnrico Mioso */ 1081f8c0cfa5SBjørn Mork if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 10824a0e3e98SEnrico Mioso if (ctx->delayed_ndp16->dwSignature == sign) 10834a0e3e98SEnrico Mioso return ctx->delayed_ndp16; 10844a0e3e98SEnrico Mioso 1085f8c0cfa5SBjørn Mork /* We can only push a single NDP to the end. Return 1086f8c0cfa5SBjørn Mork * NULL to send what we've already got and queue this 1087f8c0cfa5SBjørn Mork * skb for later. 1088f8c0cfa5SBjørn Mork */ 1089f8c0cfa5SBjørn Mork else if (ctx->delayed_ndp16->dwSignature) 1090f8c0cfa5SBjørn Mork return NULL; 1091f8c0cfa5SBjørn Mork } 1092f8c0cfa5SBjørn Mork 1093c78b7c58SBjørn Mork /* follow the chain of NDPs, looking for a match */ 1094c78b7c58SBjørn Mork while (ndpoffset) { 1095c78b7c58SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); 1096c78b7c58SBjørn Mork if (ndp16->dwSignature == sign) 1097c78b7c58SBjørn Mork return ndp16; 1098c78b7c58SBjørn Mork ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); 1099c78b7c58SBjørn Mork } 1100c78b7c58SBjørn Mork 1101c78b7c58SBjørn Mork /* align new NDP */ 11024a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1103e1069bbfSJim Baxter cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); 1104c78b7c58SBjørn Mork 1105c78b7c58SBjørn Mork /* verify that there is room for the NDP and the datagram (reserve) */ 1106e1069bbfSJim Baxter if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) 1107c78b7c58SBjørn Mork return NULL; 1108c78b7c58SBjørn Mork 1109c78b7c58SBjørn Mork /* link to it */ 1110c78b7c58SBjørn Mork if (ndp16) 1111c78b7c58SBjørn Mork ndp16->wNextNdpIndex = cpu_to_le16(skb->len); 1112c78b7c58SBjørn Mork else 1113c78b7c58SBjørn Mork nth16->wNdpIndex = cpu_to_le16(skb->len); 1114c78b7c58SBjørn Mork 1115c78b7c58SBjørn Mork /* push a new empty NDP */ 11164a0e3e98SEnrico Mioso if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 1117ad941e69Syuan linyu ndp16 = skb_put_zero(skb, ctx->max_ndp_size); 11184a0e3e98SEnrico Mioso else 11194a0e3e98SEnrico Mioso ndp16 = ctx->delayed_ndp16; 11204a0e3e98SEnrico Mioso 1121c78b7c58SBjørn Mork ndp16->dwSignature = sign; 1122c78b7c58SBjørn Mork ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); 1123c78b7c58SBjørn Mork return ndp16; 1124900d495aSAlexey Orishko } 1125900d495aSAlexey Orishko 11260fa81b30SAlexander Bersenev static struct usb_cdc_ncm_ndp32 *cdc_ncm_ndp32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) 11270fa81b30SAlexander Bersenev { 11280fa81b30SAlexander Bersenev struct usb_cdc_ncm_ndp32 *ndp32 = NULL; 11290fa81b30SAlexander Bersenev struct usb_cdc_ncm_nth32 *nth32 = (void *)skb->data; 11300fa81b30SAlexander Bersenev size_t ndpoffset = le32_to_cpu(nth32->dwNdpIndex); 11310fa81b30SAlexander Bersenev 11320fa81b30SAlexander Bersenev /* If NDP should be moved to the end of the NCM package, we can't follow the 11330fa81b30SAlexander Bersenev * NTH32 header as we would normally do. NDP isn't written to the SKB yet, and 11340fa81b30SAlexander Bersenev * the wNdpIndex field in the header is actually not consistent with reality. It will be later. 11350fa81b30SAlexander Bersenev */ 11360fa81b30SAlexander Bersenev if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 11370fa81b30SAlexander Bersenev if (ctx->delayed_ndp32->dwSignature == sign) 11380fa81b30SAlexander Bersenev return ctx->delayed_ndp32; 11390fa81b30SAlexander Bersenev 11400fa81b30SAlexander Bersenev /* We can only push a single NDP to the end. Return 11410fa81b30SAlexander Bersenev * NULL to send what we've already got and queue this 11420fa81b30SAlexander Bersenev * skb for later. 11430fa81b30SAlexander Bersenev */ 11440fa81b30SAlexander Bersenev else if (ctx->delayed_ndp32->dwSignature) 11450fa81b30SAlexander Bersenev return NULL; 11460fa81b30SAlexander Bersenev } 11470fa81b30SAlexander Bersenev 11480fa81b30SAlexander Bersenev /* follow the chain of NDPs, looking for a match */ 11490fa81b30SAlexander Bersenev while (ndpoffset) { 11500fa81b30SAlexander Bersenev ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb->data + ndpoffset); 11510fa81b30SAlexander Bersenev if (ndp32->dwSignature == sign) 11520fa81b30SAlexander Bersenev return ndp32; 11530fa81b30SAlexander Bersenev ndpoffset = le32_to_cpu(ndp32->dwNextNdpIndex); 11540fa81b30SAlexander Bersenev } 11550fa81b30SAlexander Bersenev 11560fa81b30SAlexander Bersenev /* align new NDP */ 11570fa81b30SAlexander Bersenev if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 11580fa81b30SAlexander Bersenev cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size); 11590fa81b30SAlexander Bersenev 11600fa81b30SAlexander Bersenev /* verify that there is room for the NDP and the datagram (reserve) */ 11610fa81b30SAlexander Bersenev if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size) 11620fa81b30SAlexander Bersenev return NULL; 11630fa81b30SAlexander Bersenev 11640fa81b30SAlexander Bersenev /* link to it */ 11650fa81b30SAlexander Bersenev if (ndp32) 11660fa81b30SAlexander Bersenev ndp32->dwNextNdpIndex = cpu_to_le32(skb->len); 11670fa81b30SAlexander Bersenev else 11680fa81b30SAlexander Bersenev nth32->dwNdpIndex = cpu_to_le32(skb->len); 11690fa81b30SAlexander Bersenev 11700fa81b30SAlexander Bersenev /* push a new empty NDP */ 11710fa81b30SAlexander Bersenev if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) 11720fa81b30SAlexander Bersenev ndp32 = skb_put_zero(skb, ctx->max_ndp_size); 11730fa81b30SAlexander Bersenev else 11740fa81b30SAlexander Bersenev ndp32 = ctx->delayed_ndp32; 11750fa81b30SAlexander Bersenev 11760fa81b30SAlexander Bersenev ndp32->dwSignature = sign; 11775d0ab06bSAlexander Bersenev ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32)); 11780fa81b30SAlexander Bersenev return ndp32; 11790fa81b30SAlexander Bersenev } 11800fa81b30SAlexander Bersenev 1181c91ce3b6SBjørn Mork struct sk_buff * 1182bed6f762SBjørn Mork cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) 1183900d495aSAlexey Orishko { 1184bed6f762SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 11850fa81b30SAlexander Bersenev union { 1186c78b7c58SBjørn Mork struct usb_cdc_ncm_nth16 *nth16; 11870fa81b30SAlexander Bersenev struct usb_cdc_ncm_nth32 *nth32; 11880fa81b30SAlexander Bersenev } nth; 11890fa81b30SAlexander Bersenev union { 1190c78b7c58SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 11910fa81b30SAlexander Bersenev struct usb_cdc_ncm_ndp32 *ndp32; 11920fa81b30SAlexander Bersenev } ndp; 1193900d495aSAlexey Orishko struct sk_buff *skb_out; 1194c78b7c58SBjørn Mork u16 n = 0, index, ndplen; 119584e77a8bSAlexey Orishko u8 ready2send = 0; 11964a0e3e98SEnrico Mioso u32 delayed_ndp_size; 1197aeca3a77SJim Baxter size_t padding_count; 11984a0e3e98SEnrico Mioso 11994a0e3e98SEnrico Mioso /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated 12004a0e3e98SEnrico Mioso * accordingly. Otherwise, we should check here. 12014a0e3e98SEnrico Mioso */ 12024a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) 12037a68d725SJouni K. Seppänen delayed_ndp_size = ctx->max_ndp_size + 12047a68d725SJouni K. Seppänen max_t(u32, 12057a68d725SJouni K. Seppänen ctx->tx_ndp_modulus, 12067a68d725SJouni K. Seppänen ctx->tx_modulus + ctx->tx_remainder) - 1; 12074a0e3e98SEnrico Mioso else 12084a0e3e98SEnrico Mioso delayed_ndp_size = 0; 1209900d495aSAlexey Orishko 1210900d495aSAlexey Orishko /* if there is a remaining skb, it gets priority */ 1211c78b7c58SBjørn Mork if (skb != NULL) { 1212900d495aSAlexey Orishko swap(skb, ctx->tx_rem_skb); 1213c78b7c58SBjørn Mork swap(sign, ctx->tx_rem_sign); 1214c78b7c58SBjørn Mork } else { 121584e77a8bSAlexey Orishko ready2send = 1; 1216c78b7c58SBjørn Mork } 1217900d495aSAlexey Orishko 1218900d495aSAlexey Orishko /* check if we are resuming an OUT skb */ 1219900d495aSAlexey Orishko skb_out = ctx->tx_curr_skb; 1220900d495aSAlexey Orishko 1221c78b7c58SBjørn Mork /* allocate a new OUT skb */ 1222c78b7c58SBjørn Mork if (!skb_out) { 1223e1069bbfSJim Baxter if (ctx->tx_low_mem_val == 0) { 1224e1069bbfSJim Baxter ctx->tx_curr_size = ctx->tx_max; 1225e1069bbfSJim Baxter skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); 1226e1069bbfSJim Baxter /* If the memory allocation fails we will wait longer 1227e1069bbfSJim Baxter * each time before attempting another full size 1228e1069bbfSJim Baxter * allocation again to not overload the system 1229e1069bbfSJim Baxter * further. 1230e1069bbfSJim Baxter */ 1231e1069bbfSJim Baxter if (skb_out == NULL) { 1232e1069bbfSJim Baxter ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1, 1233e1069bbfSJim Baxter (unsigned)CDC_NCM_LOW_MEM_MAX_CNT); 1234e1069bbfSJim Baxter ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt; 1235e1069bbfSJim Baxter } 1236e1069bbfSJim Baxter } 1237e1069bbfSJim Baxter if (skb_out == NULL) { 1238e1069bbfSJim Baxter /* See if a very small allocation is possible. 1239e1069bbfSJim Baxter * We will send this packet immediately and hope 1240e1069bbfSJim Baxter * that there is more memory available later. 1241e1069bbfSJim Baxter */ 1242e1069bbfSJim Baxter if (skb) 1243e1069bbfSJim Baxter ctx->tx_curr_size = max(skb->len, 1244e1069bbfSJim Baxter (u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE); 1245e1069bbfSJim Baxter else 1246e1069bbfSJim Baxter ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE; 1247e1069bbfSJim Baxter skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC); 1248e1069bbfSJim Baxter 1249e1069bbfSJim Baxter /* No allocation possible so we will abort */ 1250900d495aSAlexey Orishko if (skb_out == NULL) { 1251900d495aSAlexey Orishko if (skb != NULL) { 1252900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1253bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1254900d495aSAlexey Orishko } 1255900d495aSAlexey Orishko goto exit_no_skb; 1256900d495aSAlexey Orishko } 1257e1069bbfSJim Baxter ctx->tx_low_mem_val--; 1258e1069bbfSJim Baxter } 12590fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 1260c78b7c58SBjørn Mork /* fill out the initial 16-bit NTB header */ 12610fa81b30SAlexander Bersenev nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16)); 12620fa81b30SAlexander Bersenev nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); 12630fa81b30SAlexander Bersenev nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); 12640fa81b30SAlexander Bersenev nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++); 12650fa81b30SAlexander Bersenev } else { 12660fa81b30SAlexander Bersenev /* fill out the initial 32-bit NTB header */ 12670fa81b30SAlexander Bersenev nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32)); 12680fa81b30SAlexander Bersenev nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN); 12690fa81b30SAlexander Bersenev nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32)); 12700fa81b30SAlexander Bersenev nth.nth32->wSequence = cpu_to_le16(ctx->tx_seq++); 12710fa81b30SAlexander Bersenev } 1272900d495aSAlexey Orishko 1273c78b7c58SBjørn Mork /* count total number of frames in this NTB */ 1274900d495aSAlexey Orishko ctx->tx_curr_frame_num = 0; 1275beeecd42SBjørn Mork 1276beeecd42SBjørn Mork /* recent payload counter for this skb_out */ 1277beeecd42SBjørn Mork ctx->tx_curr_frame_payload = 0; 1278900d495aSAlexey Orishko } 1279900d495aSAlexey Orishko 1280c78b7c58SBjørn Mork for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { 1281c78b7c58SBjørn Mork /* send any remaining skb first */ 1282900d495aSAlexey Orishko if (skb == NULL) { 1283900d495aSAlexey Orishko skb = ctx->tx_rem_skb; 1284c78b7c58SBjørn Mork sign = ctx->tx_rem_sign; 1285900d495aSAlexey Orishko ctx->tx_rem_skb = NULL; 1286900d495aSAlexey Orishko 1287900d495aSAlexey Orishko /* check for end of skb */ 1288900d495aSAlexey Orishko if (skb == NULL) 1289900d495aSAlexey Orishko break; 1290900d495aSAlexey Orishko } 1291900d495aSAlexey Orishko 1292c78b7c58SBjørn Mork /* get the appropriate NDP for this skb */ 12930fa81b30SAlexander Bersenev if (ctx->is_ndp16) 12940fa81b30SAlexander Bersenev ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 12950fa81b30SAlexander Bersenev else 12960fa81b30SAlexander Bersenev ndp.ndp32 = cdc_ncm_ndp32(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); 1297c78b7c58SBjørn Mork 1298c78b7c58SBjørn Mork /* align beginning of next frame */ 1299e1069bbfSJim Baxter cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_curr_size); 1300c78b7c58SBjørn Mork 1301c78b7c58SBjørn Mork /* check if we had enough room left for both NDP and frame */ 13020fa81b30SAlexander Bersenev if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) || 13030fa81b30SAlexander Bersenev skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) { 1304900d495aSAlexey Orishko if (n == 0) { 1305900d495aSAlexey Orishko /* won't fit, MTU problem? */ 1306900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1307900d495aSAlexey Orishko skb = NULL; 1308bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1309900d495aSAlexey Orishko } else { 1310900d495aSAlexey Orishko /* no room for skb - store for later */ 1311900d495aSAlexey Orishko if (ctx->tx_rem_skb != NULL) { 1312900d495aSAlexey Orishko dev_kfree_skb_any(ctx->tx_rem_skb); 1313bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1314900d495aSAlexey Orishko } 1315900d495aSAlexey Orishko ctx->tx_rem_skb = skb; 1316c78b7c58SBjørn Mork ctx->tx_rem_sign = sign; 1317900d495aSAlexey Orishko skb = NULL; 131884e77a8bSAlexey Orishko ready2send = 1; 1319beeecd42SBjørn Mork ctx->tx_reason_ntb_full++; /* count reason for transmitting */ 1320900d495aSAlexey Orishko } 1321900d495aSAlexey Orishko break; 1322900d495aSAlexey Orishko } 1323900d495aSAlexey Orishko 1324ef9ac209SWang Qing /* calculate frame number within this NDP */ 13250fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 13260fa81b30SAlexander Bersenev ndplen = le16_to_cpu(ndp.ndp16->wLength); 1327c78b7c58SBjørn Mork index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; 1328900d495aSAlexey Orishko 1329c78b7c58SBjørn Mork /* OK, add this skb */ 13300fa81b30SAlexander Bersenev ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); 13310fa81b30SAlexander Bersenev ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); 13320fa81b30SAlexander Bersenev ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); 13330fa81b30SAlexander Bersenev } else { 13340fa81b30SAlexander Bersenev ndplen = le16_to_cpu(ndp.ndp32->wLength); 13350fa81b30SAlexander Bersenev index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1; 13360fa81b30SAlexander Bersenev 13370fa81b30SAlexander Bersenev ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len); 13380fa81b30SAlexander Bersenev ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len); 13390fa81b30SAlexander Bersenev ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32)); 13400fa81b30SAlexander Bersenev } 134159ae1d12SJohannes Berg skb_put_data(skb_out, skb->data, skb->len); 1342beeecd42SBjørn Mork ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ 1343900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1344900d495aSAlexey Orishko skb = NULL; 1345c78b7c58SBjørn Mork 1346c78b7c58SBjørn Mork /* send now if this NDP is full */ 1347c78b7c58SBjørn Mork if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { 1348c78b7c58SBjørn Mork ready2send = 1; 1349beeecd42SBjørn Mork ctx->tx_reason_ndp_full++; /* count reason for transmitting */ 1350c78b7c58SBjørn Mork break; 1351c78b7c58SBjørn Mork } 1352900d495aSAlexey Orishko } 1353900d495aSAlexey Orishko 1354900d495aSAlexey Orishko /* free up any dangling skb */ 1355900d495aSAlexey Orishko if (skb != NULL) { 1356900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1357900d495aSAlexey Orishko skb = NULL; 1358bed6f762SBjørn Mork dev->net->stats.tx_dropped++; 1359900d495aSAlexey Orishko } 1360900d495aSAlexey Orishko 1361900d495aSAlexey Orishko ctx->tx_curr_frame_num = n; 1362900d495aSAlexey Orishko 1363900d495aSAlexey Orishko if (n == 0) { 1364900d495aSAlexey Orishko /* wait for more frames */ 1365900d495aSAlexey Orishko /* push variables */ 1366900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1367900d495aSAlexey Orishko goto exit_no_skb; 1368900d495aSAlexey Orishko 13696c4e548fSBjørn Mork } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { 1370900d495aSAlexey Orishko /* wait for more frames */ 1371900d495aSAlexey Orishko /* push variables */ 1372900d495aSAlexey Orishko ctx->tx_curr_skb = skb_out; 1373900d495aSAlexey Orishko /* set the pending count */ 1374900d495aSAlexey Orishko if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) 1375c84ff1d6SAlexey Orishko ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; 1376900d495aSAlexey Orishko goto exit_no_skb; 1377900d495aSAlexey Orishko 1378900d495aSAlexey Orishko } else { 1379beeecd42SBjørn Mork if (n == ctx->tx_max_datagrams) 1380beeecd42SBjørn Mork ctx->tx_reason_max_datagram++; /* count reason for transmitting */ 1381900d495aSAlexey Orishko /* frame goes out */ 1382900d495aSAlexey Orishko /* variables will be reset at next call */ 1383900d495aSAlexey Orishko } 1384900d495aSAlexey Orishko 13854a0e3e98SEnrico Mioso /* If requested, put NDP at end of frame. */ 13864a0e3e98SEnrico Mioso if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { 13870fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 13880fa81b30SAlexander Bersenev nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 138949c2c3f2SBjørn Mork cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); 13900fa81b30SAlexander Bersenev nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len); 139159ae1d12SJohannes Berg skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size); 13924a0e3e98SEnrico Mioso 13934a0e3e98SEnrico Mioso /* Zero out delayed NDP - signature checking will naturally fail. */ 13940fa81b30SAlexander Bersenev ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); 13950fa81b30SAlexander Bersenev } else { 13960fa81b30SAlexander Bersenev nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; 13970fa81b30SAlexander Bersenev cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size); 13980fa81b30SAlexander Bersenev nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len); 13990fa81b30SAlexander Bersenev skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size); 14000fa81b30SAlexander Bersenev 14010fa81b30SAlexander Bersenev ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size); 14020fa81b30SAlexander Bersenev } 14034a0e3e98SEnrico Mioso } 14044a0e3e98SEnrico Mioso 140543e4c6dfSBjørn Mork /* If collected data size is less or equal ctx->min_tx_pkt 140620572226SBjørn Mork * bytes, we send buffers as it is. If we get more data, it 140720572226SBjørn Mork * would be more efficient for USB HS mobile device with DMA 140820572226SBjørn Mork * engine to receive a full size NTB, than canceling DMA 140920572226SBjørn Mork * transfer and receiving a short packet. 14104d619f62SBjørn Mork * 14114d619f62SBjørn Mork * This optimization support is pointless if we end up sending 14124d619f62SBjørn Mork * a ZLP after full sized NTBs. 1413900d495aSAlexey Orishko */ 14144d619f62SBjørn Mork if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && 1415aeca3a77SJim Baxter skb_out->len > ctx->min_tx_pkt) { 1416e1069bbfSJim Baxter padding_count = ctx->tx_curr_size - skb_out->len; 14177a68d725SJouni K. Seppänen if (!WARN_ON(padding_count > ctx->tx_curr_size)) 1418b080db58SJohannes Berg skb_put_zero(skb_out, padding_count); 1419e1069bbfSJim Baxter } else if (skb_out->len < ctx->tx_curr_size && 1420aeca3a77SJim Baxter (skb_out->len % dev->maxpacket) == 0) { 1421634fef61SJohannes Berg skb_put_u8(skb_out, 0); /* force short packet */ 1422aeca3a77SJim Baxter } 1423900d495aSAlexey Orishko 1424c78b7c58SBjørn Mork /* set final frame length */ 14250fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 14260fa81b30SAlexander Bersenev nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; 14270fa81b30SAlexander Bersenev nth.nth16->wBlockLength = cpu_to_le16(skb_out->len); 14280fa81b30SAlexander Bersenev } else { 14290fa81b30SAlexander Bersenev nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data; 14300fa81b30SAlexander Bersenev nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len); 14310fa81b30SAlexander Bersenev } 1432900d495aSAlexey Orishko 1433900d495aSAlexey Orishko /* return skb */ 1434900d495aSAlexey Orishko ctx->tx_curr_skb = NULL; 1435beeecd42SBjørn Mork 1436beeecd42SBjørn Mork /* keep private stats: framing overhead and number of NTBs */ 1437beeecd42SBjørn Mork ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; 1438beeecd42SBjørn Mork ctx->tx_ntbs++; 1439beeecd42SBjørn Mork 14407a1e890eSBen Hutchings /* usbnet will count all the framing overhead by default. 1441beeecd42SBjørn Mork * Adjust the stats so that the tx_bytes counter show real 1442beeecd42SBjørn Mork * payload data instead. 1443beeecd42SBjørn Mork */ 14447a1e890eSBen Hutchings usbnet_set_skb_tx_stats(skb_out, n, 144544f6731dSBjørn Mork (long)ctx->tx_curr_frame_payload - skb_out->len); 14461e9e39f4SBen Hutchings 1447900d495aSAlexey Orishko return skb_out; 1448900d495aSAlexey Orishko 1449900d495aSAlexey Orishko exit_no_skb: 1450046c6594SBjørn Mork /* Start timer, if there is a remaining non-empty skb */ 1451046c6594SBjørn Mork if (ctx->tx_curr_skb != NULL && n > 0) 1452c84ff1d6SAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1453900d495aSAlexey Orishko return NULL; 1454900d495aSAlexey Orishko } 1455c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); 1456900d495aSAlexey Orishko 1457900d495aSAlexey Orishko static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) 1458900d495aSAlexey Orishko { 1459900d495aSAlexey Orishko /* start timer, if not already started */ 1460c84ff1d6SAlexey Orishko if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) 1461c84ff1d6SAlexey Orishko hrtimer_start(&ctx->tx_timer, 14628b0e1953SThomas Gleixner ctx->timer_interval, 1463c84ff1d6SAlexey Orishko HRTIMER_MODE_REL); 1464900d495aSAlexey Orishko } 1465900d495aSAlexey Orishko 1466c84ff1d6SAlexey Orishko static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) 1467900d495aSAlexey Orishko { 1468c84ff1d6SAlexey Orishko struct cdc_ncm_ctx *ctx = 1469c84ff1d6SAlexey Orishko container_of(timer, struct cdc_ncm_ctx, tx_timer); 1470900d495aSAlexey Orishko 1471c84ff1d6SAlexey Orishko if (!atomic_read(&ctx->stop)) 1472c84ff1d6SAlexey Orishko tasklet_schedule(&ctx->bh); 1473c84ff1d6SAlexey Orishko return HRTIMER_NORESTART; 1474c84ff1d6SAlexey Orishko } 1475c84ff1d6SAlexey Orishko 14764f4e5436SEmil Renner Berthing static void cdc_ncm_txpath_bh(struct tasklet_struct *t) 1477c84ff1d6SAlexey Orishko { 14784f4e5436SEmil Renner Berthing struct cdc_ncm_ctx *ctx = from_tasklet(ctx, t, bh); 14794f4e5436SEmil Renner Berthing struct usbnet *dev = ctx->dev; 1480c84ff1d6SAlexey Orishko 1481c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 1482900d495aSAlexey Orishko if (ctx->tx_timer_pending != 0) { 1483900d495aSAlexey Orishko ctx->tx_timer_pending--; 1484900d495aSAlexey Orishko cdc_ncm_tx_timeout_start(ctx); 1485c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1486bed6f762SBjørn Mork } else if (dev->net != NULL) { 1487beeecd42SBjørn Mork ctx->tx_reason_timeout++; /* count reason for transmitting */ 1488c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1489bed6f762SBjørn Mork netif_tx_lock_bh(dev->net); 1490bed6f762SBjørn Mork usbnet_start_xmit(NULL, dev->net); 1491bed6f762SBjørn Mork netif_tx_unlock_bh(dev->net); 14927b1e0cbaSBjørn Mork } else { 14937b1e0cbaSBjørn Mork spin_unlock_bh(&ctx->mtx); 1494900d495aSAlexey Orishko } 1495f742aa8aSAlexey Orishko } 1496900d495aSAlexey Orishko 14972f69702cSEnrico Mioso struct sk_buff * 1498900d495aSAlexey Orishko cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) 1499900d495aSAlexey Orishko { 1500900d495aSAlexey Orishko struct sk_buff *skb_out; 1501900d495aSAlexey Orishko struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1502900d495aSAlexey Orishko 1503900d495aSAlexey Orishko /* 1504900d495aSAlexey Orishko * The Ethernet API we are using does not support transmitting 1505900d495aSAlexey Orishko * multiple Ethernet frames in a single call. This driver will 1506900d495aSAlexey Orishko * accumulate multiple Ethernet frames and send out a larger 1507900d495aSAlexey Orishko * USB frame when the USB buffer is full or when a single jiffies 1508900d495aSAlexey Orishko * timeout happens. 1509900d495aSAlexey Orishko */ 1510900d495aSAlexey Orishko if (ctx == NULL) 1511900d495aSAlexey Orishko goto error; 1512900d495aSAlexey Orishko 1513c84ff1d6SAlexey Orishko spin_lock_bh(&ctx->mtx); 15140fa81b30SAlexander Bersenev 15150fa81b30SAlexander Bersenev if (ctx->is_ndp16) 1516bed6f762SBjørn Mork skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); 15170fa81b30SAlexander Bersenev else 15180fa81b30SAlexander Bersenev skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)); 15190fa81b30SAlexander Bersenev 1520c84ff1d6SAlexey Orishko spin_unlock_bh(&ctx->mtx); 1521900d495aSAlexey Orishko return skb_out; 1522900d495aSAlexey Orishko 1523900d495aSAlexey Orishko error: 1524900d495aSAlexey Orishko if (skb != NULL) 1525900d495aSAlexey Orishko dev_kfree_skb_any(skb); 1526900d495aSAlexey Orishko 1527900d495aSAlexey Orishko return NULL; 1528900d495aSAlexey Orishko } 15292f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); 1530900d495aSAlexey Orishko 1531ff06ab13SBjørn Mork /* verify NTB header and return offset of first NDP, or negative error */ 1532c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 1533900d495aSAlexey Orishko { 1534ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1535d5ddb4a5SAlexey Orishko struct usb_cdc_ncm_nth16 *nth16; 1536ff06ab13SBjørn Mork int len; 1537ff06ab13SBjørn Mork int ret = -EINVAL; 1538900d495aSAlexey Orishko 1539900d495aSAlexey Orishko if (ctx == NULL) 1540900d495aSAlexey Orishko goto error; 1541900d495aSAlexey Orishko 1542d5ddb4a5SAlexey Orishko if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + 1543d5ddb4a5SAlexey Orishko sizeof(struct usb_cdc_ncm_ndp16))) { 1544ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 1545900d495aSAlexey Orishko goto error; 1546900d495aSAlexey Orishko } 1547900d495aSAlexey Orishko 1548d5ddb4a5SAlexey Orishko nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; 1549900d495aSAlexey Orishko 1550986e10d6SBjørn Mork if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { 15515448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 15525448d75fSBjørn Mork "invalid NTH16 signature <%#010x>\n", 1553d5ddb4a5SAlexey Orishko le32_to_cpu(nth16->dwSignature)); 1554900d495aSAlexey Orishko goto error; 1555900d495aSAlexey Orishko } 1556900d495aSAlexey Orishko 1557d5ddb4a5SAlexey Orishko len = le16_to_cpu(nth16->wBlockLength); 1558d5ddb4a5SAlexey Orishko if (len > ctx->rx_max) { 1559ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1560ae223cd4SBjørn Mork "unsupported NTB block length %u/%u\n", len, 1561d5ddb4a5SAlexey Orishko ctx->rx_max); 1562900d495aSAlexey Orishko goto error; 1563900d495aSAlexey Orishko } 1564900d495aSAlexey Orishko 1565d5ddb4a5SAlexey Orishko if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && 1566d5ddb4a5SAlexey Orishko (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && 1567d5ddb4a5SAlexey Orishko !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { 1568ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1569ae223cd4SBjørn Mork "sequence number glitch prev=%d curr=%d\n", 1570d5ddb4a5SAlexey Orishko ctx->rx_seq, le16_to_cpu(nth16->wSequence)); 1571d5ddb4a5SAlexey Orishko } 1572d5ddb4a5SAlexey Orishko ctx->rx_seq = le16_to_cpu(nth16->wSequence); 1573d5ddb4a5SAlexey Orishko 1574ff06ab13SBjørn Mork ret = le16_to_cpu(nth16->wNdpIndex); 1575ff06ab13SBjørn Mork error: 1576ff06ab13SBjørn Mork return ret; 1577ff06ab13SBjørn Mork } 1578c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); 1579ff06ab13SBjørn Mork 15800fa81b30SAlexander Bersenev int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) 15810fa81b30SAlexander Bersenev { 15820fa81b30SAlexander Bersenev struct usbnet *dev = netdev_priv(skb_in->dev); 15830fa81b30SAlexander Bersenev struct usb_cdc_ncm_nth32 *nth32; 15840fa81b30SAlexander Bersenev int len; 15850fa81b30SAlexander Bersenev int ret = -EINVAL; 15860fa81b30SAlexander Bersenev 15870fa81b30SAlexander Bersenev if (ctx == NULL) 15880fa81b30SAlexander Bersenev goto error; 15890fa81b30SAlexander Bersenev 15900fa81b30SAlexander Bersenev if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) + 15910fa81b30SAlexander Bersenev sizeof(struct usb_cdc_ncm_ndp32))) { 15920fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, "frame too short\n"); 15930fa81b30SAlexander Bersenev goto error; 15940fa81b30SAlexander Bersenev } 15950fa81b30SAlexander Bersenev 15960fa81b30SAlexander Bersenev nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data; 15970fa81b30SAlexander Bersenev 15980fa81b30SAlexander Bersenev if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) { 15990fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, 16000fa81b30SAlexander Bersenev "invalid NTH32 signature <%#010x>\n", 16010fa81b30SAlexander Bersenev le32_to_cpu(nth32->dwSignature)); 16020fa81b30SAlexander Bersenev goto error; 16030fa81b30SAlexander Bersenev } 16040fa81b30SAlexander Bersenev 16050fa81b30SAlexander Bersenev len = le32_to_cpu(nth32->dwBlockLength); 16060fa81b30SAlexander Bersenev if (len > ctx->rx_max) { 16070fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, 16080fa81b30SAlexander Bersenev "unsupported NTB block length %u/%u\n", len, 16090fa81b30SAlexander Bersenev ctx->rx_max); 16100fa81b30SAlexander Bersenev goto error; 16110fa81b30SAlexander Bersenev } 16120fa81b30SAlexander Bersenev 16130fa81b30SAlexander Bersenev if ((ctx->rx_seq + 1) != le16_to_cpu(nth32->wSequence) && 16140fa81b30SAlexander Bersenev (ctx->rx_seq || le16_to_cpu(nth32->wSequence)) && 16150fa81b30SAlexander Bersenev !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) { 16160fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, 16170fa81b30SAlexander Bersenev "sequence number glitch prev=%d curr=%d\n", 16180fa81b30SAlexander Bersenev ctx->rx_seq, le16_to_cpu(nth32->wSequence)); 16190fa81b30SAlexander Bersenev } 16200fa81b30SAlexander Bersenev ctx->rx_seq = le16_to_cpu(nth32->wSequence); 16210fa81b30SAlexander Bersenev 16220fa81b30SAlexander Bersenev ret = le32_to_cpu(nth32->dwNdpIndex); 16230fa81b30SAlexander Bersenev error: 16240fa81b30SAlexander Bersenev return ret; 16250fa81b30SAlexander Bersenev } 16260fa81b30SAlexander Bersenev EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32); 16270fa81b30SAlexander Bersenev 1628ff06ab13SBjørn Mork /* verify NDP header and return number of datagrams, or negative error */ 1629c91ce3b6SBjørn Mork int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) 1630ff06ab13SBjørn Mork { 1631ae223cd4SBjørn Mork struct usbnet *dev = netdev_priv(skb_in->dev); 1632ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 1633ff06ab13SBjørn Mork int ret = -EINVAL; 1634ff06ab13SBjørn Mork 163575d67d35SBjørn Mork if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { 1636ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 1637ae223cd4SBjørn Mork ndpoffset); 1638900d495aSAlexey Orishko goto error; 1639900d495aSAlexey Orishko } 164075d67d35SBjørn Mork ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1641900d495aSAlexey Orishko 1642ff06ab13SBjørn Mork if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { 1643ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", 1644a26fd05dSBjørn Mork le16_to_cpu(ndp16->wLength)); 1645ff06ab13SBjørn Mork goto error; 1646ff06ab13SBjørn Mork } 1647ff06ab13SBjørn Mork 1648ff06ab13SBjørn Mork ret = ((le16_to_cpu(ndp16->wLength) - 1649ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_ndp16)) / 1650ff06ab13SBjørn Mork sizeof(struct usb_cdc_ncm_dpe16)); 1651ff06ab13SBjørn Mork ret--; /* we process NDP entries except for the last one */ 1652ff06ab13SBjørn Mork 1653ae223cd4SBjørn Mork if ((sizeof(struct usb_cdc_ncm_ndp16) + 1654ae223cd4SBjørn Mork ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { 1655ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 1656ff06ab13SBjørn Mork ret = -EINVAL; 1657ff06ab13SBjørn Mork } 1658ff06ab13SBjørn Mork 1659ff06ab13SBjørn Mork error: 1660ff06ab13SBjørn Mork return ret; 1661ff06ab13SBjørn Mork } 1662c91ce3b6SBjørn Mork EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); 1663ff06ab13SBjørn Mork 16640fa81b30SAlexander Bersenev /* verify NDP header and return number of datagrams, or negative error */ 16650fa81b30SAlexander Bersenev int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset) 16660fa81b30SAlexander Bersenev { 16670fa81b30SAlexander Bersenev struct usbnet *dev = netdev_priv(skb_in->dev); 16680fa81b30SAlexander Bersenev struct usb_cdc_ncm_ndp32 *ndp32; 16690fa81b30SAlexander Bersenev int ret = -EINVAL; 16700fa81b30SAlexander Bersenev 16710fa81b30SAlexander Bersenev if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) { 16720fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", 16730fa81b30SAlexander Bersenev ndpoffset); 16740fa81b30SAlexander Bersenev goto error; 16750fa81b30SAlexander Bersenev } 16760fa81b30SAlexander Bersenev ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); 16770fa81b30SAlexander Bersenev 16780fa81b30SAlexander Bersenev if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) { 16790fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n", 16800fa81b30SAlexander Bersenev le16_to_cpu(ndp32->wLength)); 16810fa81b30SAlexander Bersenev goto error; 16820fa81b30SAlexander Bersenev } 16830fa81b30SAlexander Bersenev 16840fa81b30SAlexander Bersenev ret = ((le16_to_cpu(ndp32->wLength) - 16850fa81b30SAlexander Bersenev sizeof(struct usb_cdc_ncm_ndp32)) / 16860fa81b30SAlexander Bersenev sizeof(struct usb_cdc_ncm_dpe32)); 16870fa81b30SAlexander Bersenev ret--; /* we process NDP entries except for the last one */ 16880fa81b30SAlexander Bersenev 16890fa81b30SAlexander Bersenev if ((sizeof(struct usb_cdc_ncm_ndp32) + 16900fa81b30SAlexander Bersenev ret * (sizeof(struct usb_cdc_ncm_dpe32))) > skb_in->len) { 16910fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); 16920fa81b30SAlexander Bersenev ret = -EINVAL; 16930fa81b30SAlexander Bersenev } 16940fa81b30SAlexander Bersenev 16950fa81b30SAlexander Bersenev error: 16960fa81b30SAlexander Bersenev return ret; 16970fa81b30SAlexander Bersenev } 16980fa81b30SAlexander Bersenev EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp32); 16990fa81b30SAlexander Bersenev 17002f69702cSEnrico Mioso int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) 1701ff06ab13SBjørn Mork { 1702ff06ab13SBjørn Mork struct sk_buff *skb; 1703ff06ab13SBjørn Mork struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; 1704ff06ab13SBjørn Mork int len; 1705ff06ab13SBjørn Mork int nframes; 1706ff06ab13SBjørn Mork int x; 1707ff06ab13SBjørn Mork int offset; 17080fa81b30SAlexander Bersenev union { 1709ff06ab13SBjørn Mork struct usb_cdc_ncm_ndp16 *ndp16; 17100fa81b30SAlexander Bersenev struct usb_cdc_ncm_ndp32 *ndp32; 17110fa81b30SAlexander Bersenev } ndp; 17120fa81b30SAlexander Bersenev union { 1713ff06ab13SBjørn Mork struct usb_cdc_ncm_dpe16 *dpe16; 17140fa81b30SAlexander Bersenev struct usb_cdc_ncm_dpe32 *dpe32; 17150fa81b30SAlexander Bersenev } dpe; 17160fa81b30SAlexander Bersenev 1717ff06ab13SBjørn Mork int ndpoffset; 1718ff06ab13SBjørn Mork int loopcount = 50; /* arbitrary max preventing infinite loop */ 1719beeecd42SBjørn Mork u32 payload = 0; 1720ff06ab13SBjørn Mork 17210fa81b30SAlexander Bersenev if (ctx->is_ndp16) 1722ff06ab13SBjørn Mork ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); 17230fa81b30SAlexander Bersenev else 17240fa81b30SAlexander Bersenev ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in); 17250fa81b30SAlexander Bersenev 1726ff06ab13SBjørn Mork if (ndpoffset < 0) 1727ff06ab13SBjørn Mork goto error; 1728ff06ab13SBjørn Mork 1729ff06ab13SBjørn Mork next_ndp: 17300fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 1731ff06ab13SBjørn Mork nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); 1732ff06ab13SBjørn Mork if (nframes < 0) 1733ff06ab13SBjørn Mork goto error; 1734ff06ab13SBjørn Mork 17350fa81b30SAlexander Bersenev ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); 1736ff06ab13SBjørn Mork 17370fa81b30SAlexander Bersenev if (ndp.ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { 17385448d75fSBjørn Mork netif_dbg(dev, rx_err, dev->net, 17395448d75fSBjørn Mork "invalid DPT16 signature <%#010x>\n", 17400fa81b30SAlexander Bersenev le32_to_cpu(ndp.ndp16->dwSignature)); 174175d67d35SBjørn Mork goto err_ndp; 1742900d495aSAlexey Orishko } 17430fa81b30SAlexander Bersenev dpe.dpe16 = ndp.ndp16->dpe16; 17440fa81b30SAlexander Bersenev } else { 17450fa81b30SAlexander Bersenev nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset); 17460fa81b30SAlexander Bersenev if (nframes < 0) 17470fa81b30SAlexander Bersenev goto error; 1748900d495aSAlexey Orishko 17490fa81b30SAlexander Bersenev ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset); 17500fa81b30SAlexander Bersenev 17510fa81b30SAlexander Bersenev if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) { 17520fa81b30SAlexander Bersenev netif_dbg(dev, rx_err, dev->net, 17530fa81b30SAlexander Bersenev "invalid DPT32 signature <%#010x>\n", 17540fa81b30SAlexander Bersenev le32_to_cpu(ndp.ndp32->dwSignature)); 17550fa81b30SAlexander Bersenev goto err_ndp; 17560fa81b30SAlexander Bersenev } 17570fa81b30SAlexander Bersenev dpe.dpe32 = ndp.ndp32->dpe32; 17580fa81b30SAlexander Bersenev } 17590fa81b30SAlexander Bersenev 17600fa81b30SAlexander Bersenev for (x = 0; x < nframes; x++) { 17610fa81b30SAlexander Bersenev if (ctx->is_ndp16) { 17620fa81b30SAlexander Bersenev offset = le16_to_cpu(dpe.dpe16->wDatagramIndex); 17630fa81b30SAlexander Bersenev len = le16_to_cpu(dpe.dpe16->wDatagramLength); 17640fa81b30SAlexander Bersenev } else { 17650fa81b30SAlexander Bersenev offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex); 17660fa81b30SAlexander Bersenev len = le32_to_cpu(dpe.dpe32->dwDatagramLength); 17670fa81b30SAlexander Bersenev } 1768900d495aSAlexey Orishko 1769900d495aSAlexey Orishko /* 1770900d495aSAlexey Orishko * CDC NCM ch. 3.7 1771900d495aSAlexey Orishko * All entries after first NULL entry are to be ignored 1772900d495aSAlexey Orishko */ 1773d5ddb4a5SAlexey Orishko if ((offset == 0) || (len == 0)) { 1774900d495aSAlexey Orishko if (!x) 177575d67d35SBjørn Mork goto err_ndp; /* empty NTB */ 1776900d495aSAlexey Orishko break; 1777900d495aSAlexey Orishko } 1778900d495aSAlexey Orishko 1779900d495aSAlexey Orishko /* sanity checking */ 1780d5ddb4a5SAlexey Orishko if (((offset + len) > skb_in->len) || 1781d5ddb4a5SAlexey Orishko (len > ctx->rx_max) || (len < ETH_HLEN)) { 1782ae223cd4SBjørn Mork netif_dbg(dev, rx_err, dev->net, 1783ae223cd4SBjørn Mork "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", 1784d5ddb4a5SAlexey Orishko x, offset, len, skb_in); 1785900d495aSAlexey Orishko if (!x) 178675d67d35SBjørn Mork goto err_ndp; 1787900d495aSAlexey Orishko break; 1788900d495aSAlexey Orishko 1789900d495aSAlexey Orishko } else { 17901e2c6117SBjørn Mork /* create a fresh copy to reduce truesize */ 17911e2c6117SBjørn Mork skb = netdev_alloc_skb_ip_align(dev->net, len); 17929e56790aSJesper Juhl if (!skb) 17939e56790aSJesper Juhl goto error; 179459ae1d12SJohannes Berg skb_put_data(skb, skb_in->data + offset, len); 1795900d495aSAlexey Orishko usbnet_skb_return(dev, skb); 1796beeecd42SBjørn Mork payload += len; /* count payload bytes in this NTB */ 1797900d495aSAlexey Orishko } 17980fa81b30SAlexander Bersenev 17990fa81b30SAlexander Bersenev if (ctx->is_ndp16) 18000fa81b30SAlexander Bersenev dpe.dpe16++; 18010fa81b30SAlexander Bersenev else 18020fa81b30SAlexander Bersenev dpe.dpe32++; 1803900d495aSAlexey Orishko } 180475d67d35SBjørn Mork err_ndp: 180575d67d35SBjørn Mork /* are there more NDPs to process? */ 18060fa81b30SAlexander Bersenev if (ctx->is_ndp16) 18070fa81b30SAlexander Bersenev ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex); 18080fa81b30SAlexander Bersenev else 18090fa81b30SAlexander Bersenev ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex); 18100fa81b30SAlexander Bersenev 181175d67d35SBjørn Mork if (ndpoffset && loopcount--) 181275d67d35SBjørn Mork goto next_ndp; 181375d67d35SBjørn Mork 1814beeecd42SBjørn Mork /* update stats */ 1815beeecd42SBjørn Mork ctx->rx_overhead += skb_in->len - payload; 1816beeecd42SBjørn Mork ctx->rx_ntbs++; 1817beeecd42SBjørn Mork 1818900d495aSAlexey Orishko return 1; 1819900d495aSAlexey Orishko error: 1820900d495aSAlexey Orishko return 0; 1821900d495aSAlexey Orishko } 18222f69702cSEnrico Mioso EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); 1823900d495aSAlexey Orishko 1824900d495aSAlexey Orishko static void 1825bed6f762SBjørn Mork cdc_ncm_speed_change(struct usbnet *dev, 182684e77a8bSAlexey Orishko struct usb_cdc_speed_change *data) 1827900d495aSAlexey Orishko { 1828*eb47c274SOliver Neukum /* RTL8156 shipped before 2021 sends notification about every 32ms. */ 1829*eb47c274SOliver Neukum dev->rx_speed = le32_to_cpu(data->DLBitRRate); 1830*eb47c274SOliver Neukum dev->tx_speed = le32_to_cpu(data->ULBitRate); 1831900d495aSAlexey Orishko } 1832900d495aSAlexey Orishko 1833900d495aSAlexey Orishko static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) 1834900d495aSAlexey Orishko { 1835900d495aSAlexey Orishko struct usb_cdc_notification *event; 1836900d495aSAlexey Orishko 1837900d495aSAlexey Orishko if (urb->actual_length < sizeof(*event)) 1838900d495aSAlexey Orishko return; 1839900d495aSAlexey Orishko 1840900d495aSAlexey Orishko /* test for split data in 8-byte chunks */ 1841900d495aSAlexey Orishko if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { 1842bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 184384e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)urb->transfer_buffer); 1844900d495aSAlexey Orishko return; 1845900d495aSAlexey Orishko } 1846900d495aSAlexey Orishko 1847900d495aSAlexey Orishko event = urb->transfer_buffer; 1848900d495aSAlexey Orishko 1849900d495aSAlexey Orishko switch (event->bNotificationType) { 1850900d495aSAlexey Orishko case USB_CDC_NOTIFY_NETWORK_CONNECTION: 1851900d495aSAlexey Orishko /* 1852900d495aSAlexey Orishko * According to the CDC NCM specification ch.7.1 1853900d495aSAlexey Orishko * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be 1854900d495aSAlexey Orishko * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. 1855900d495aSAlexey Orishko */ 1856*eb47c274SOliver Neukum /* RTL8156 shipped before 2021 sends notification about 1857*eb47c274SOliver Neukum * every 32ms. Don't forward notification if state is same. 1858*eb47c274SOliver Neukum */ 1859de658a19SGrant Grundler if (netif_carrier_ok(dev->net) != !!event->wValue) 1860fa83dbeeSBjørn Mork usbnet_link_change(dev, !!event->wValue, 0); 1861900d495aSAlexey Orishko break; 1862900d495aSAlexey Orishko 1863900d495aSAlexey Orishko case USB_CDC_NOTIFY_SPEED_CHANGE: 186484e77a8bSAlexey Orishko if (urb->actual_length < (sizeof(*event) + 186584e77a8bSAlexey Orishko sizeof(struct usb_cdc_speed_change))) 1866900d495aSAlexey Orishko set_bit(EVENT_STS_SPLIT, &dev->flags); 1867900d495aSAlexey Orishko else 1868bed6f762SBjørn Mork cdc_ncm_speed_change(dev, 186984e77a8bSAlexey Orishko (struct usb_cdc_speed_change *)&event[1]); 1870900d495aSAlexey Orishko break; 1871900d495aSAlexey Orishko 1872900d495aSAlexey Orishko default: 187367a36606SBjørn Mork dev_dbg(&dev->udev->dev, 187467a36606SBjørn Mork "NCM: unexpected notification 0x%02x!\n", 187567a36606SBjørn Mork event->bNotificationType); 1876900d495aSAlexey Orishko break; 1877900d495aSAlexey Orishko } 1878900d495aSAlexey Orishko } 1879900d495aSAlexey Orishko 1880900d495aSAlexey Orishko static const struct driver_info cdc_ncm_info = { 1881900d495aSAlexey Orishko .description = "CDC NCM", 18824d06dd53SBjørn Mork .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 18834d06dd53SBjørn Mork | FLAG_LINK_INTR, 1884900d495aSAlexey Orishko .bind = cdc_ncm_bind, 1885900d495aSAlexey Orishko .unbind = cdc_ncm_unbind, 1886a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1887900d495aSAlexey Orishko .status = cdc_ncm_status, 1888900d495aSAlexey Orishko .rx_fixup = cdc_ncm_rx_fixup, 1889900d495aSAlexey Orishko .tx_fixup = cdc_ncm_tx_fixup, 1890e10dcb1bSMiguel Rodríguez Pérez .set_rx_mode = usbnet_cdc_update_filter, 1891900d495aSAlexey Orishko }; 1892900d495aSAlexey Orishko 1893f94898eaSDan Williams /* Same as cdc_ncm_info, but with FLAG_WWAN */ 1894f94898eaSDan Williams static const struct driver_info wwan_info = { 1895f94898eaSDan Williams .description = "Mobile Broadband Network Device", 1896f94898eaSDan Williams .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 18974d06dd53SBjørn Mork | FLAG_LINK_INTR | FLAG_WWAN, 1898f94898eaSDan Williams .bind = cdc_ncm_bind, 1899f94898eaSDan Williams .unbind = cdc_ncm_unbind, 1900a5e40708SOliver Neukum .manage_power = usbnet_manage_power, 1901f94898eaSDan Williams .status = cdc_ncm_status, 1902f94898eaSDan Williams .rx_fixup = cdc_ncm_rx_fixup, 1903f94898eaSDan Williams .tx_fixup = cdc_ncm_tx_fixup, 1904e10dcb1bSMiguel Rodríguez Pérez .set_rx_mode = usbnet_cdc_update_filter, 1905f94898eaSDan Williams }; 1906f94898eaSDan Williams 19072f62d5aaSWei Shuai /* Same as wwan_info, but with FLAG_NOARP */ 19082f62d5aaSWei Shuai static const struct driver_info wwan_noarp_info = { 19092f62d5aaSWei Shuai .description = "Mobile Broadband Network Device (NO ARP)", 19102f62d5aaSWei Shuai .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET 19114d06dd53SBjørn Mork | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, 19122f62d5aaSWei Shuai .bind = cdc_ncm_bind, 19132f62d5aaSWei Shuai .unbind = cdc_ncm_unbind, 19142f62d5aaSWei Shuai .manage_power = usbnet_manage_power, 19152f62d5aaSWei Shuai .status = cdc_ncm_status, 19162f62d5aaSWei Shuai .rx_fixup = cdc_ncm_rx_fixup, 19172f62d5aaSWei Shuai .tx_fixup = cdc_ncm_tx_fixup, 1918e10dcb1bSMiguel Rodríguez Pérez .set_rx_mode = usbnet_cdc_update_filter, 19192f62d5aaSWei Shuai }; 19202f62d5aaSWei Shuai 1921f94898eaSDan Williams static const struct usb_device_id cdc_devs[] = { 1922f94898eaSDan Williams /* Ericsson MBM devices like F5521gw */ 1923f94898eaSDan Williams { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1924f94898eaSDan Williams | USB_DEVICE_ID_MATCH_VENDOR, 1925f94898eaSDan Williams .idVendor = 0x0bdb, 1926f94898eaSDan Williams .bInterfaceClass = USB_CLASS_COMM, 1927f94898eaSDan Williams .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1928f94898eaSDan Williams .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1929f94898eaSDan Williams .driver_info = (unsigned long) &wwan_info, 1930f94898eaSDan Williams }, 1931f94898eaSDan Williams 193279f42232SDaniele Palmas /* Telit LE910 V2 */ 193379f42232SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, 193479f42232SDaniele Palmas USB_CLASS_COMM, 193579f42232SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 193679f42232SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 193779f42232SDaniele Palmas }, 193879f42232SDaniele Palmas 1939670c0d62SDaniele Palmas /* DW5812 LTE Verizon Mobile Broadband Card 1940670c0d62SDaniele Palmas * Unlike DW5550 this device requires FLAG_NOARP 1941670c0d62SDaniele Palmas */ 1942670c0d62SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, 1943670c0d62SDaniele Palmas USB_CLASS_COMM, 1944670c0d62SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1945670c0d62SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 1946670c0d62SDaniele Palmas }, 1947670c0d62SDaniele Palmas 1948fb83d5f2SDaniele Palmas /* DW5813 LTE AT&T Mobile Broadband Card 1949fb83d5f2SDaniele Palmas * Unlike DW5550 this device requires FLAG_NOARP 1950fb83d5f2SDaniele Palmas */ 1951fb83d5f2SDaniele Palmas { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, 1952fb83d5f2SDaniele Palmas USB_CLASS_COMM, 1953fb83d5f2SDaniele Palmas USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 1954fb83d5f2SDaniele Palmas .driver_info = (unsigned long)&wwan_noarp_info, 1955fb83d5f2SDaniele Palmas }, 1956fb83d5f2SDaniele Palmas 1957f3a1ef9cSPeter Meiser /* Dell branded MBM devices like DW5550 */ 1958f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1959f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1960f3a1ef9cSPeter Meiser .idVendor = 0x413c, 1961f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1962f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1963f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1964f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1965f3a1ef9cSPeter Meiser }, 1966f3a1ef9cSPeter Meiser 1967f3a1ef9cSPeter Meiser /* Toshiba branded MBM devices */ 1968f3a1ef9cSPeter Meiser { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO 1969f3a1ef9cSPeter Meiser | USB_DEVICE_ID_MATCH_VENDOR, 1970f3a1ef9cSPeter Meiser .idVendor = 0x0930, 1971f3a1ef9cSPeter Meiser .bInterfaceClass = USB_CLASS_COMM, 1972f3a1ef9cSPeter Meiser .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, 1973f3a1ef9cSPeter Meiser .bInterfaceProtocol = USB_CDC_PROTO_NONE, 1974f3a1ef9cSPeter Meiser .driver_info = (unsigned long) &wwan_info, 1975f3a1ef9cSPeter Meiser }, 1976f3a1ef9cSPeter Meiser 19771f84eab4SBjørn Mork /* tag Huawei devices as wwan */ 19781f84eab4SBjørn Mork { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 19791f84eab4SBjørn Mork USB_CLASS_COMM, 19801f84eab4SBjørn Mork USB_CDC_SUBCLASS_NCM, 19811f84eab4SBjørn Mork USB_CDC_PROTO_NONE), 19821f84eab4SBjørn Mork .driver_info = (unsigned long)&wwan_info, 19831f84eab4SBjørn Mork }, 19841f84eab4SBjørn Mork 19852f62d5aaSWei Shuai /* Infineon(now Intel) HSPA Modem platform */ 19862f62d5aaSWei Shuai { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, 19872f62d5aaSWei Shuai USB_CLASS_COMM, 19882f62d5aaSWei Shuai USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 19892f62d5aaSWei Shuai .driver_info = (unsigned long)&wwan_noarp_info, 19902f62d5aaSWei Shuai }, 19912f62d5aaSWei Shuai 19923b638f0fSAleksander Morgado /* u-blox TOBY-L4 */ 19933b638f0fSAleksander Morgado { USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010, 19943b638f0fSAleksander Morgado USB_CLASS_COMM, 19953b638f0fSAleksander Morgado USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 19963b638f0fSAleksander Morgado .driver_info = (unsigned long)&wwan_info, 19973b638f0fSAleksander Morgado }, 19983b638f0fSAleksander Morgado 1999f94898eaSDan Williams /* Generic CDC-NCM devices */ 2000f94898eaSDan Williams { USB_INTERFACE_INFO(USB_CLASS_COMM, 2001f94898eaSDan Williams USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), 2002f94898eaSDan Williams .driver_info = (unsigned long)&cdc_ncm_info, 2003f94898eaSDan Williams }, 2004f94898eaSDan Williams { 2005f94898eaSDan Williams }, 2006f94898eaSDan Williams }; 2007f94898eaSDan Williams MODULE_DEVICE_TABLE(usb, cdc_devs); 2008f94898eaSDan Williams 2009900d495aSAlexey Orishko static struct usb_driver cdc_ncm_driver = { 2010900d495aSAlexey Orishko .name = "cdc_ncm", 2011900d495aSAlexey Orishko .id_table = cdc_devs, 2012085e50e1SBjørn Mork .probe = usbnet_probe, 2013085e50e1SBjørn Mork .disconnect = usbnet_disconnect, 2014900d495aSAlexey Orishko .suspend = usbnet_suspend, 2015900d495aSAlexey Orishko .resume = usbnet_resume, 201685e3c65fSStefan Metzmacher .reset_resume = usbnet_resume, 2017900d495aSAlexey Orishko .supports_autosuspend = 1, 2018e1f12eb6SSarah Sharp .disable_hub_initiated_lpm = 1, 2019900d495aSAlexey Orishko }; 2020900d495aSAlexey Orishko 2021d632eb1bSGreg Kroah-Hartman module_usb_driver(cdc_ncm_driver); 2022900d495aSAlexey Orishko 2023900d495aSAlexey Orishko MODULE_AUTHOR("Hans Petter Selasky"); 2024900d495aSAlexey Orishko MODULE_DESCRIPTION("USB CDC NCM host driver"); 2025900d495aSAlexey Orishko MODULE_LICENSE("Dual BSD/GPL"); 2026