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![Bjørn Mork](/assets/img/avatar_default.png)
The min_tx_pkt variable decides the cutoff point where the driver will stop padding out NTBs to maximum size. The padding is a tradeoff where we use some USB bus bandwidth to allow the device to receive fixed size buffers. Different devices will have different optimal settings, spanning from no padding at all to padding every NTB. There is no way to automatically figure out which setting is best for a specific device. The default value is a reasonable tradeoff, calculated based on the USB packet size and out NTB max size. This may have to be changed along with any tx_max changes. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
1616 lines
48 KiB
C
1616 lines
48 KiB
C
/*
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* cdc_ncm.c
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*
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* Copyright (C) ST-Ericsson 2010-2012
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* Contact: Alexey Orishko <alexey.orishko@stericsson.com>
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* Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
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*
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* USB Host Driver for Network Control Model (NCM)
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* http://www.usb.org/developers/devclass_docs/NCM10.zip
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*
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* The NCM encoding, decoding and initialization logic
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* derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose this file to be licensed under the terms
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* of the GNU General Public License (GPL) Version 2 or the 2-clause
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* BSD license listed below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/ctype.h>
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#include <linux/ethtool.h>
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#include <linux/workqueue.h>
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#include <linux/mii.h>
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#include <linux/crc32.h>
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#include <linux/usb.h>
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#include <linux/hrtimer.h>
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#include <linux/atomic.h>
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#include <linux/usb/usbnet.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb/cdc_ncm.h>
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#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
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static bool prefer_mbim = true;
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#else
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static bool prefer_mbim;
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#endif
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module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
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static void cdc_ncm_txpath_bh(unsigned long param);
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static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
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static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
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static struct usb_driver cdc_ncm_driver;
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struct cdc_ncm_stats {
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char stat_string[ETH_GSTRING_LEN];
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int sizeof_stat;
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int stat_offset;
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};
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#define CDC_NCM_STAT(str, m) { \
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.stat_string = str, \
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.sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \
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.stat_offset = offsetof(struct cdc_ncm_ctx, m) }
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#define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m)
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static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = {
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CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full),
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CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full),
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CDC_NCM_SIMPLE_STAT(tx_reason_timeout),
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CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram),
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CDC_NCM_SIMPLE_STAT(tx_overhead),
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CDC_NCM_SIMPLE_STAT(tx_ntbs),
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CDC_NCM_SIMPLE_STAT(rx_overhead),
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CDC_NCM_SIMPLE_STAT(rx_ntbs),
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};
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static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset)
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{
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switch (sset) {
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case ETH_SS_STATS:
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return ARRAY_SIZE(cdc_ncm_gstrings_stats);
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default:
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return -EOPNOTSUPP;
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}
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}
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static void cdc_ncm_get_ethtool_stats(struct net_device *netdev,
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struct ethtool_stats __always_unused *stats,
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u64 *data)
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{
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struct usbnet *dev = netdev_priv(netdev);
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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int i;
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char *p = NULL;
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for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
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p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset;
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data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
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}
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}
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static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data)
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{
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u8 *p = data;
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int i;
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switch (stringset) {
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case ETH_SS_STATS:
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for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
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memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN);
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p += ETH_GSTRING_LEN;
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}
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}
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}
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static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
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static const struct ethtool_ops cdc_ncm_ethtool_ops = {
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.get_settings = usbnet_get_settings,
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.set_settings = usbnet_set_settings,
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.get_link = usbnet_get_link,
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.nway_reset = usbnet_nway_reset,
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.get_drvinfo = usbnet_get_drvinfo,
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.get_msglevel = usbnet_get_msglevel,
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.set_msglevel = usbnet_set_msglevel,
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.get_ts_info = ethtool_op_get_ts_info,
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.get_sset_count = cdc_ncm_get_sset_count,
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.get_strings = cdc_ncm_get_strings,
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.get_ethtool_stats = cdc_ncm_get_ethtool_stats,
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};
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static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx)
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{
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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u32 val, max, min;
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/* clamp new_rx to sane values */
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min = USB_CDC_NCM_NTB_MIN_IN_SIZE;
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max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
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/* dwNtbInMaxSize spec violation? Use MIN size for both limits */
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if (max < min) {
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dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n",
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le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min);
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max = min;
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}
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val = clamp_t(u32, new_rx, min, max);
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if (val != new_rx)
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dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max);
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return val;
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}
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static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx)
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{
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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u32 val, max, min;
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/* clamp new_tx to sane values */
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min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
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max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
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/* some devices set dwNtbOutMaxSize too low for the above default */
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min = min(min, max);
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val = clamp_t(u32, new_tx, min, max);
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if (val != new_tx)
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dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max);
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return val;
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}
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static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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return sprintf(buf, "%u\n", ctx->min_tx_pkt);
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}
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static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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return sprintf(buf, "%u\n", ctx->rx_max);
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}
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static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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return sprintf(buf, "%u\n", ctx->tx_max);
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}
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static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC);
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}
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static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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unsigned long val;
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/* no need to restrict values - anything from 0 to infinity is OK */
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if (kstrtoul(buf, 0, &val))
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return -EINVAL;
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ctx->min_tx_pkt = val;
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return len;
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}
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static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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unsigned long val;
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if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val)
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return -EINVAL;
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cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max);
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return len;
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}
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static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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unsigned long val;
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if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val)
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return -EINVAL;
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cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val);
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return len;
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}
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static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
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{
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struct usbnet *dev = netdev_priv(to_net_dev(d));
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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ssize_t ret;
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unsigned long val;
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ret = kstrtoul(buf, 0, &val);
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if (ret)
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return ret;
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if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX))
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return -EINVAL;
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spin_lock_bh(&ctx->mtx);
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ctx->timer_interval = val * NSEC_PER_USEC;
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if (!ctx->timer_interval)
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ctx->tx_timer_pending = 0;
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spin_unlock_bh(&ctx->mtx);
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return len;
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}
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static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt);
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static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max);
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static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max);
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static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs);
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#define NCM_PARM_ATTR(name, format, tocpu) \
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static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \
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{ \
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struct usbnet *dev = netdev_priv(to_net_dev(d)); \
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \
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return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL)
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NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu);
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NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu);
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NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu);
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NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu);
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NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu);
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NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu);
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NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu);
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NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu);
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NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu);
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NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu);
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static struct attribute *cdc_ncm_sysfs_attrs[] = {
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&dev_attr_min_tx_pkt.attr,
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&dev_attr_rx_max.attr,
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&dev_attr_tx_max.attr,
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&dev_attr_tx_timer_usecs.attr,
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&dev_attr_bmNtbFormatsSupported.attr,
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&dev_attr_dwNtbInMaxSize.attr,
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&dev_attr_wNdpInDivisor.attr,
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&dev_attr_wNdpInPayloadRemainder.attr,
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&dev_attr_wNdpInAlignment.attr,
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&dev_attr_dwNtbOutMaxSize.attr,
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&dev_attr_wNdpOutDivisor.attr,
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&dev_attr_wNdpOutPayloadRemainder.attr,
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&dev_attr_wNdpOutAlignment.attr,
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&dev_attr_wNtbOutMaxDatagrams.attr,
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NULL,
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};
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static struct attribute_group cdc_ncm_sysfs_attr_group = {
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.name = "cdc_ncm",
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.attrs = cdc_ncm_sysfs_attrs,
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};
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/* handle rx_max and tx_max changes */
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static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
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{
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struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
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u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
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u32 val;
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val = cdc_ncm_check_rx_max(dev, new_rx);
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/* inform device about NTB input size changes */
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if (val != ctx->rx_max) {
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__le32 dwNtbInMaxSize = cpu_to_le32(val);
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dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
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/* tell device to use new size */
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if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
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USB_TYPE_CLASS | USB_DIR_OUT
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| USB_RECIP_INTERFACE,
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0, iface_no, &dwNtbInMaxSize, 4) < 0)
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dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
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else
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ctx->rx_max = val;
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}
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/* usbnet use these values for sizing rx queues */
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if (dev->rx_urb_size != ctx->rx_max) {
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dev->rx_urb_size = ctx->rx_max;
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if (netif_running(dev->net))
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usbnet_unlink_rx_urbs(dev);
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}
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val = cdc_ncm_check_tx_max(dev, new_tx);
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if (val != ctx->tx_max)
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dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
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/* Adding a pad byte here if necessary simplifies the handling
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* in cdc_ncm_fill_tx_frame, making tx_max always represent
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* the real skb max size.
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*
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* We cannot use dev->maxpacket here because this is called from
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* .bind which is called before usbnet sets up dev->maxpacket
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*/
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if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
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val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
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val++;
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/* we might need to flush any pending tx buffers if running */
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if (netif_running(dev->net) && val > ctx->tx_max) {
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netif_tx_lock_bh(dev->net);
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usbnet_start_xmit(NULL, dev->net);
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/* make sure tx_curr_skb is reallocated if it was empty */
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if (ctx->tx_curr_skb) {
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dev_kfree_skb_any(ctx->tx_curr_skb);
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ctx->tx_curr_skb = NULL;
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}
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ctx->tx_max = val;
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netif_tx_unlock_bh(dev->net);
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} else {
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ctx->tx_max = val;
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}
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dev->hard_mtu = ctx->tx_max;
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/* max qlen depend on hard_mtu and rx_urb_size */
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usbnet_update_max_qlen(dev);
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/* never pad more than 3 full USB packets per transfer */
|
|
ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1),
|
|
CDC_NCM_MIN_TX_PKT, ctx->tx_max);
|
|
}
|
|
|
|
/* helpers for NCM and MBIM differences */
|
|
static u8 cdc_ncm_flags(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
|
|
return ctx->mbim_desc->bmNetworkCapabilities;
|
|
if (ctx->func_desc)
|
|
return ctx->func_desc->bmNetworkCapabilities;
|
|
return 0;
|
|
}
|
|
|
|
static int cdc_ncm_eth_hlen(struct usbnet *dev)
|
|
{
|
|
if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
|
|
return 0;
|
|
return ETH_HLEN;
|
|
}
|
|
|
|
static u32 cdc_ncm_min_dgram_size(struct usbnet *dev)
|
|
{
|
|
if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
|
|
return CDC_MBIM_MIN_DATAGRAM_SIZE;
|
|
return CDC_NCM_MIN_DATAGRAM_SIZE;
|
|
}
|
|
|
|
static u32 cdc_ncm_max_dgram_size(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
|
|
return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
|
|
if (ctx->ether_desc)
|
|
return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
|
|
return CDC_NCM_MAX_DATAGRAM_SIZE;
|
|
}
|
|
|
|
/* initial one-time device setup. MUST be called with the data interface
|
|
* in altsetting 0
|
|
*/
|
|
static int cdc_ncm_init(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
|
|
int err;
|
|
|
|
err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
|
|
USB_TYPE_CLASS | USB_DIR_IN
|
|
|USB_RECIP_INTERFACE,
|
|
0, iface_no, &ctx->ncm_parm,
|
|
sizeof(ctx->ncm_parm));
|
|
if (err < 0) {
|
|
dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
|
|
return err; /* GET_NTB_PARAMETERS is required */
|
|
}
|
|
|
|
/* set CRC Mode */
|
|
if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) {
|
|
dev_dbg(&dev->intf->dev, "Setting CRC mode off\n");
|
|
err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
|
|
USB_TYPE_CLASS | USB_DIR_OUT
|
|
| USB_RECIP_INTERFACE,
|
|
USB_CDC_NCM_CRC_NOT_APPENDED,
|
|
iface_no, NULL, 0);
|
|
if (err < 0)
|
|
dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n");
|
|
}
|
|
|
|
/* set NTB format, if both formats are supported.
|
|
*
|
|
* "The host shall only send this command while the NCM Data
|
|
* Interface is in alternate setting 0."
|
|
*/
|
|
if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) &
|
|
USB_CDC_NCM_NTB32_SUPPORTED) {
|
|
dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n");
|
|
err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
|
|
USB_TYPE_CLASS | USB_DIR_OUT
|
|
| USB_RECIP_INTERFACE,
|
|
USB_CDC_NCM_NTB16_FORMAT,
|
|
iface_no, NULL, 0);
|
|
if (err < 0)
|
|
dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
|
|
}
|
|
|
|
/* set initial device values */
|
|
ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
|
|
ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
|
|
ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
|
|
ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
|
|
ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
|
|
/* devices prior to NCM Errata shall set this field to zero */
|
|
ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
|
|
|
|
dev_dbg(&dev->intf->dev,
|
|
"dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
|
|
ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
|
|
ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
|
|
|
|
/* max count of tx datagrams */
|
|
if ((ctx->tx_max_datagrams == 0) ||
|
|
(ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
|
|
ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
|
|
|
|
/* set up maximum NDP size */
|
|
ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
|
|
|
|
/* initial coalescing timer interval */
|
|
ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* set a new max datagram size */
|
|
static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
|
|
__le16 max_datagram_size;
|
|
u16 mbim_mtu;
|
|
int err;
|
|
|
|
/* set default based on descriptors */
|
|
ctx->max_datagram_size = clamp_t(u32, new_size,
|
|
cdc_ncm_min_dgram_size(dev),
|
|
CDC_NCM_MAX_DATAGRAM_SIZE);
|
|
|
|
/* inform the device about the selected Max Datagram Size? */
|
|
if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
|
|
goto out;
|
|
|
|
/* read current mtu value from device */
|
|
err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
|
|
USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
|
|
0, iface_no, &max_datagram_size, 2);
|
|
if (err < 0) {
|
|
dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
|
|
goto out;
|
|
}
|
|
|
|
if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
|
|
goto out;
|
|
|
|
max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
|
|
err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
|
|
USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
|
|
0, iface_no, &max_datagram_size, 2);
|
|
if (err < 0)
|
|
dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
|
|
|
|
out:
|
|
/* set MTU to max supported by the device if necessary */
|
|
dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
|
|
|
|
/* do not exceed operater preferred MTU */
|
|
if (ctx->mbim_extended_desc) {
|
|
mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU);
|
|
if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu)
|
|
dev->net->mtu = mbim_mtu;
|
|
}
|
|
}
|
|
|
|
static void cdc_ncm_fix_modulus(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
u32 val;
|
|
|
|
/*
|
|
* verify that the structure alignment is:
|
|
* - power of two
|
|
* - not greater than the maximum transmit length
|
|
* - not less than four bytes
|
|
*/
|
|
val = ctx->tx_ndp_modulus;
|
|
|
|
if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
|
|
(val != ((-val) & val)) || (val >= ctx->tx_max)) {
|
|
dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
|
|
ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
|
|
}
|
|
|
|
/*
|
|
* verify that the payload alignment is:
|
|
* - power of two
|
|
* - not greater than the maximum transmit length
|
|
* - not less than four bytes
|
|
*/
|
|
val = ctx->tx_modulus;
|
|
|
|
if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
|
|
(val != ((-val) & val)) || (val >= ctx->tx_max)) {
|
|
dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
|
|
ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
|
|
}
|
|
|
|
/* verify the payload remainder */
|
|
if (ctx->tx_remainder >= ctx->tx_modulus) {
|
|
dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
|
|
ctx->tx_remainder = 0;
|
|
}
|
|
|
|
/* adjust TX-remainder according to NCM specification. */
|
|
ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
|
|
(ctx->tx_modulus - 1));
|
|
}
|
|
|
|
static int cdc_ncm_setup(struct usbnet *dev)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
u32 def_rx, def_tx;
|
|
|
|
/* be conservative when selecting intial buffer size to
|
|
* increase the number of hosts this will work for
|
|
*/
|
|
def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX,
|
|
le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
|
|
def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX,
|
|
le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
|
|
|
|
/* clamp rx_max and tx_max and inform device */
|
|
cdc_ncm_update_rxtx_max(dev, def_rx, def_tx);
|
|
|
|
/* sanitize the modulus and remainder values */
|
|
cdc_ncm_fix_modulus(dev);
|
|
|
|
/* set max datagram size */
|
|
cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
struct usb_host_endpoint *e, *in = NULL, *out = NULL;
|
|
u8 ep;
|
|
|
|
for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
|
|
|
|
e = intf->cur_altsetting->endpoint + ep;
|
|
switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
|
|
case USB_ENDPOINT_XFER_INT:
|
|
if (usb_endpoint_dir_in(&e->desc)) {
|
|
if (!dev->status)
|
|
dev->status = e;
|
|
}
|
|
break;
|
|
|
|
case USB_ENDPOINT_XFER_BULK:
|
|
if (usb_endpoint_dir_in(&e->desc)) {
|
|
if (!in)
|
|
in = e;
|
|
} else {
|
|
if (!out)
|
|
out = e;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (in && !dev->in)
|
|
dev->in = usb_rcvbulkpipe(dev->udev,
|
|
in->desc.bEndpointAddress &
|
|
USB_ENDPOINT_NUMBER_MASK);
|
|
if (out && !dev->out)
|
|
dev->out = usb_sndbulkpipe(dev->udev,
|
|
out->desc.bEndpointAddress &
|
|
USB_ENDPOINT_NUMBER_MASK);
|
|
}
|
|
|
|
static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
|
|
{
|
|
if (ctx == NULL)
|
|
return;
|
|
|
|
if (ctx->tx_rem_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_rem_skb);
|
|
ctx->tx_rem_skb = NULL;
|
|
}
|
|
|
|
if (ctx->tx_curr_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_curr_skb);
|
|
ctx->tx_curr_skb = NULL;
|
|
}
|
|
|
|
kfree(ctx);
|
|
}
|
|
|
|
int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
|
|
{
|
|
const struct usb_cdc_union_desc *union_desc = NULL;
|
|
struct cdc_ncm_ctx *ctx;
|
|
struct usb_driver *driver;
|
|
u8 *buf;
|
|
int len;
|
|
int temp;
|
|
u8 iface_no;
|
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
|
|
ctx->bh.data = (unsigned long)dev;
|
|
ctx->bh.func = cdc_ncm_txpath_bh;
|
|
atomic_set(&ctx->stop, 0);
|
|
spin_lock_init(&ctx->mtx);
|
|
|
|
/* store ctx pointer in device data field */
|
|
dev->data[0] = (unsigned long)ctx;
|
|
|
|
/* only the control interface can be successfully probed */
|
|
ctx->control = intf;
|
|
|
|
/* get some pointers */
|
|
driver = driver_of(intf);
|
|
buf = intf->cur_altsetting->extra;
|
|
len = intf->cur_altsetting->extralen;
|
|
|
|
/* parse through descriptors associated with control interface */
|
|
while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
|
|
|
|
if (buf[1] != USB_DT_CS_INTERFACE)
|
|
goto advance;
|
|
|
|
switch (buf[2]) {
|
|
case USB_CDC_UNION_TYPE:
|
|
if (buf[0] < sizeof(*union_desc))
|
|
break;
|
|
|
|
union_desc = (const struct usb_cdc_union_desc *)buf;
|
|
/* the master must be the interface we are probing */
|
|
if (intf->cur_altsetting->desc.bInterfaceNumber !=
|
|
union_desc->bMasterInterface0) {
|
|
dev_dbg(&intf->dev, "bogus CDC Union\n");
|
|
goto error;
|
|
}
|
|
ctx->data = usb_ifnum_to_if(dev->udev,
|
|
union_desc->bSlaveInterface0);
|
|
break;
|
|
|
|
case USB_CDC_ETHERNET_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->ether_desc)))
|
|
break;
|
|
|
|
ctx->ether_desc =
|
|
(const struct usb_cdc_ether_desc *)buf;
|
|
break;
|
|
|
|
case USB_CDC_NCM_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->func_desc)))
|
|
break;
|
|
|
|
ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
|
|
break;
|
|
|
|
case USB_CDC_MBIM_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->mbim_desc)))
|
|
break;
|
|
|
|
ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
|
|
break;
|
|
|
|
case USB_CDC_MBIM_EXTENDED_TYPE:
|
|
if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))
|
|
break;
|
|
|
|
ctx->mbim_extended_desc =
|
|
(const struct usb_cdc_mbim_extended_desc *)buf;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
advance:
|
|
/* advance to next descriptor */
|
|
temp = buf[0];
|
|
buf += temp;
|
|
len -= temp;
|
|
}
|
|
|
|
/* some buggy devices have an IAD but no CDC Union */
|
|
if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
|
|
ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
|
|
dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
|
|
}
|
|
|
|
/* check if we got everything */
|
|
if (!ctx->data) {
|
|
dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
|
|
goto error;
|
|
}
|
|
if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) {
|
|
if (!ctx->mbim_desc) {
|
|
dev_dbg(&intf->dev, "MBIM functional descriptor missing\n");
|
|
goto error;
|
|
}
|
|
} else {
|
|
if (!ctx->ether_desc || !ctx->func_desc) {
|
|
dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
/* claim data interface, if different from control */
|
|
if (ctx->data != ctx->control) {
|
|
temp = usb_driver_claim_interface(driver, ctx->data, dev);
|
|
if (temp) {
|
|
dev_dbg(&intf->dev, "failed to claim data intf\n");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
|
|
|
|
/* reset data interface */
|
|
temp = usb_set_interface(dev->udev, iface_no, 0);
|
|
if (temp) {
|
|
dev_dbg(&intf->dev, "set interface failed\n");
|
|
goto error2;
|
|
}
|
|
|
|
/* initialize basic device settings */
|
|
if (cdc_ncm_init(dev))
|
|
goto error2;
|
|
|
|
/* configure data interface */
|
|
temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
|
|
if (temp) {
|
|
dev_dbg(&intf->dev, "set interface failed\n");
|
|
goto error2;
|
|
}
|
|
|
|
cdc_ncm_find_endpoints(dev, ctx->data);
|
|
cdc_ncm_find_endpoints(dev, ctx->control);
|
|
if (!dev->in || !dev->out || !dev->status) {
|
|
dev_dbg(&intf->dev, "failed to collect endpoints\n");
|
|
goto error2;
|
|
}
|
|
|
|
usb_set_intfdata(ctx->data, dev);
|
|
usb_set_intfdata(ctx->control, dev);
|
|
|
|
if (ctx->ether_desc) {
|
|
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
|
|
if (temp) {
|
|
dev_dbg(&intf->dev, "failed to get mac address\n");
|
|
goto error2;
|
|
}
|
|
dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
|
|
}
|
|
|
|
/* finish setting up the device specific data */
|
|
cdc_ncm_setup(dev);
|
|
|
|
/* override ethtool_ops */
|
|
dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
|
|
|
|
/* add our sysfs attrs */
|
|
dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group;
|
|
|
|
return 0;
|
|
|
|
error2:
|
|
usb_set_intfdata(ctx->control, NULL);
|
|
usb_set_intfdata(ctx->data, NULL);
|
|
if (ctx->data != ctx->control)
|
|
usb_driver_release_interface(driver, ctx->data);
|
|
error:
|
|
cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
|
|
dev->data[0] = 0;
|
|
dev_info(&intf->dev, "bind() failure\n");
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
|
|
|
|
void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
struct usb_driver *driver = driver_of(intf);
|
|
|
|
if (ctx == NULL)
|
|
return; /* no setup */
|
|
|
|
atomic_set(&ctx->stop, 1);
|
|
|
|
if (hrtimer_active(&ctx->tx_timer))
|
|
hrtimer_cancel(&ctx->tx_timer);
|
|
|
|
tasklet_kill(&ctx->bh);
|
|
|
|
/* handle devices with combined control and data interface */
|
|
if (ctx->control == ctx->data)
|
|
ctx->data = NULL;
|
|
|
|
/* disconnect master --> disconnect slave */
|
|
if (intf == ctx->control && ctx->data) {
|
|
usb_set_intfdata(ctx->data, NULL);
|
|
usb_driver_release_interface(driver, ctx->data);
|
|
ctx->data = NULL;
|
|
|
|
} else if (intf == ctx->data && ctx->control) {
|
|
usb_set_intfdata(ctx->control, NULL);
|
|
usb_driver_release_interface(driver, ctx->control);
|
|
ctx->control = NULL;
|
|
}
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
cdc_ncm_free(ctx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
|
|
|
|
/* Return the number of the MBIM control interface altsetting iff it
|
|
* is preferred and available,
|
|
*/
|
|
u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
|
|
{
|
|
struct usb_host_interface *alt;
|
|
|
|
/* The MBIM spec defines a NCM compatible default altsetting,
|
|
* which we may have matched:
|
|
*
|
|
* "Functions that implement both NCM 1.0 and MBIM (an
|
|
* “NCM/MBIM function”) according to this recommendation
|
|
* shall provide two alternate settings for the
|
|
* Communication Interface. Alternate setting 0, and the
|
|
* associated class and endpoint descriptors, shall be
|
|
* constructed according to the rules given for the
|
|
* Communication Interface in section 5 of [USBNCM10].
|
|
* Alternate setting 1, and the associated class and
|
|
* endpoint descriptors, shall be constructed according to
|
|
* the rules given in section 6 (USB Device Model) of this
|
|
* specification."
|
|
*/
|
|
if (intf->num_altsetting < 2)
|
|
return intf->cur_altsetting->desc.bAlternateSetting;
|
|
|
|
if (prefer_mbim) {
|
|
alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
|
|
if (alt && cdc_ncm_comm_intf_is_mbim(alt))
|
|
return CDC_NCM_COMM_ALTSETTING_MBIM;
|
|
}
|
|
return CDC_NCM_COMM_ALTSETTING_NCM;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
|
|
|
|
static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
{
|
|
int ret;
|
|
|
|
/* MBIM backwards compatible function? */
|
|
if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
|
|
return -ENODEV;
|
|
|
|
/* The NCM data altsetting is fixed */
|
|
ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM);
|
|
|
|
/*
|
|
* We should get an event when network connection is "connected" or
|
|
* "disconnected". Set network connection in "disconnected" state
|
|
* (carrier is OFF) during attach, so the IP network stack does not
|
|
* start IPv6 negotiation and more.
|
|
*/
|
|
usbnet_link_change(dev, 0, 0);
|
|
return ret;
|
|
}
|
|
|
|
static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
|
|
{
|
|
size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
|
|
|
|
if (skb->len + align > max)
|
|
align = max - skb->len;
|
|
if (align && skb_tailroom(skb) >= align)
|
|
memset(skb_put(skb, align), 0, align);
|
|
}
|
|
|
|
/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
|
|
* allocating a new one within skb
|
|
*/
|
|
static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
|
|
{
|
|
struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
|
|
struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
|
|
size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
|
|
|
|
/* follow the chain of NDPs, looking for a match */
|
|
while (ndpoffset) {
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
|
|
if (ndp16->dwSignature == sign)
|
|
return ndp16;
|
|
ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
|
|
}
|
|
|
|
/* align new NDP */
|
|
cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
|
|
|
|
/* verify that there is room for the NDP and the datagram (reserve) */
|
|
if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size)
|
|
return NULL;
|
|
|
|
/* link to it */
|
|
if (ndp16)
|
|
ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
|
|
else
|
|
nth16->wNdpIndex = cpu_to_le16(skb->len);
|
|
|
|
/* push a new empty NDP */
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size);
|
|
ndp16->dwSignature = sign;
|
|
ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
|
|
return ndp16;
|
|
}
|
|
|
|
struct sk_buff *
|
|
cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
struct usb_cdc_ncm_nth16 *nth16;
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
struct sk_buff *skb_out;
|
|
u16 n = 0, index, ndplen;
|
|
u8 ready2send = 0;
|
|
|
|
/* if there is a remaining skb, it gets priority */
|
|
if (skb != NULL) {
|
|
swap(skb, ctx->tx_rem_skb);
|
|
swap(sign, ctx->tx_rem_sign);
|
|
} else {
|
|
ready2send = 1;
|
|
}
|
|
|
|
/* check if we are resuming an OUT skb */
|
|
skb_out = ctx->tx_curr_skb;
|
|
|
|
/* allocate a new OUT skb */
|
|
if (!skb_out) {
|
|
skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
|
|
if (skb_out == NULL) {
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
goto exit_no_skb;
|
|
}
|
|
/* fill out the initial 16-bit NTB header */
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
|
|
nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
|
|
nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
|
|
nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
|
|
|
|
/* count total number of frames in this NTB */
|
|
ctx->tx_curr_frame_num = 0;
|
|
|
|
/* recent payload counter for this skb_out */
|
|
ctx->tx_curr_frame_payload = 0;
|
|
}
|
|
|
|
for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
|
|
/* send any remaining skb first */
|
|
if (skb == NULL) {
|
|
skb = ctx->tx_rem_skb;
|
|
sign = ctx->tx_rem_sign;
|
|
ctx->tx_rem_skb = NULL;
|
|
|
|
/* check for end of skb */
|
|
if (skb == NULL)
|
|
break;
|
|
}
|
|
|
|
/* get the appropriate NDP for this skb */
|
|
ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
|
|
|
|
/* align beginning of next frame */
|
|
cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
|
|
|
|
/* check if we had enough room left for both NDP and frame */
|
|
if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
|
|
if (n == 0) {
|
|
/* won't fit, MTU problem? */
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
dev->net->stats.tx_dropped++;
|
|
} else {
|
|
/* no room for skb - store for later */
|
|
if (ctx->tx_rem_skb != NULL) {
|
|
dev_kfree_skb_any(ctx->tx_rem_skb);
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
ctx->tx_rem_skb = skb;
|
|
ctx->tx_rem_sign = sign;
|
|
skb = NULL;
|
|
ready2send = 1;
|
|
ctx->tx_reason_ntb_full++; /* count reason for transmitting */
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* calculate frame number withing this NDP */
|
|
ndplen = le16_to_cpu(ndp16->wLength);
|
|
index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
|
|
|
|
/* OK, add this skb */
|
|
ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
|
|
ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
|
|
ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
|
|
memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
|
|
ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
|
|
/* send now if this NDP is full */
|
|
if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
|
|
ready2send = 1;
|
|
ctx->tx_reason_ndp_full++; /* count reason for transmitting */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* free up any dangling skb */
|
|
if (skb != NULL) {
|
|
dev_kfree_skb_any(skb);
|
|
skb = NULL;
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
|
|
ctx->tx_curr_frame_num = n;
|
|
|
|
if (n == 0) {
|
|
/* wait for more frames */
|
|
/* push variables */
|
|
ctx->tx_curr_skb = skb_out;
|
|
goto exit_no_skb;
|
|
|
|
} else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
|
|
/* wait for more frames */
|
|
/* push variables */
|
|
ctx->tx_curr_skb = skb_out;
|
|
/* set the pending count */
|
|
if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
|
|
ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
|
|
goto exit_no_skb;
|
|
|
|
} else {
|
|
if (n == ctx->tx_max_datagrams)
|
|
ctx->tx_reason_max_datagram++; /* count reason for transmitting */
|
|
/* frame goes out */
|
|
/* variables will be reset at next call */
|
|
}
|
|
|
|
/* If collected data size is less or equal ctx->min_tx_pkt
|
|
* bytes, we send buffers as it is. If we get more data, it
|
|
* would be more efficient for USB HS mobile device with DMA
|
|
* engine to receive a full size NTB, than canceling DMA
|
|
* transfer and receiving a short packet.
|
|
*
|
|
* This optimization support is pointless if we end up sending
|
|
* a ZLP after full sized NTBs.
|
|
*/
|
|
if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
|
|
skb_out->len > ctx->min_tx_pkt)
|
|
memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
|
|
ctx->tx_max - skb_out->len);
|
|
else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0)
|
|
*skb_put(skb_out, 1) = 0; /* force short packet */
|
|
|
|
/* set final frame length */
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
|
|
nth16->wBlockLength = cpu_to_le16(skb_out->len);
|
|
|
|
/* return skb */
|
|
ctx->tx_curr_skb = NULL;
|
|
dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
|
|
|
|
/* keep private stats: framing overhead and number of NTBs */
|
|
ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
|
|
ctx->tx_ntbs++;
|
|
|
|
/* usbnet has already counted all the framing overhead.
|
|
* Adjust the stats so that the tx_bytes counter show real
|
|
* payload data instead.
|
|
*/
|
|
dev->net->stats.tx_bytes -= skb_out->len - ctx->tx_curr_frame_payload;
|
|
|
|
return skb_out;
|
|
|
|
exit_no_skb:
|
|
/* Start timer, if there is a remaining non-empty skb */
|
|
if (ctx->tx_curr_skb != NULL && n > 0)
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
|
|
|
|
static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
|
|
{
|
|
/* start timer, if not already started */
|
|
if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
|
|
hrtimer_start(&ctx->tx_timer,
|
|
ktime_set(0, ctx->timer_interval),
|
|
HRTIMER_MODE_REL);
|
|
}
|
|
|
|
static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
|
|
{
|
|
struct cdc_ncm_ctx *ctx =
|
|
container_of(timer, struct cdc_ncm_ctx, tx_timer);
|
|
|
|
if (!atomic_read(&ctx->stop))
|
|
tasklet_schedule(&ctx->bh);
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
static void cdc_ncm_txpath_bh(unsigned long param)
|
|
{
|
|
struct usbnet *dev = (struct usbnet *)param;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
spin_lock_bh(&ctx->mtx);
|
|
if (ctx->tx_timer_pending != 0) {
|
|
ctx->tx_timer_pending--;
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
spin_unlock_bh(&ctx->mtx);
|
|
} else if (dev->net != NULL) {
|
|
ctx->tx_reason_timeout++; /* count reason for transmitting */
|
|
spin_unlock_bh(&ctx->mtx);
|
|
netif_tx_lock_bh(dev->net);
|
|
usbnet_start_xmit(NULL, dev->net);
|
|
netif_tx_unlock_bh(dev->net);
|
|
} else {
|
|
spin_unlock_bh(&ctx->mtx);
|
|
}
|
|
}
|
|
|
|
struct sk_buff *
|
|
cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
|
|
{
|
|
struct sk_buff *skb_out;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
/*
|
|
* The Ethernet API we are using does not support transmitting
|
|
* multiple Ethernet frames in a single call. This driver will
|
|
* accumulate multiple Ethernet frames and send out a larger
|
|
* USB frame when the USB buffer is full or when a single jiffies
|
|
* timeout happens.
|
|
*/
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
spin_lock_bh(&ctx->mtx);
|
|
skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
|
|
spin_unlock_bh(&ctx->mtx);
|
|
return skb_out;
|
|
|
|
error:
|
|
if (skb != NULL)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
|
|
|
|
/* verify NTB header and return offset of first NDP, or negative error */
|
|
int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
|
|
{
|
|
struct usbnet *dev = netdev_priv(skb_in->dev);
|
|
struct usb_cdc_ncm_nth16 *nth16;
|
|
int len;
|
|
int ret = -EINVAL;
|
|
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
|
|
sizeof(struct usb_cdc_ncm_ndp16))) {
|
|
netif_dbg(dev, rx_err, dev->net, "frame too short\n");
|
|
goto error;
|
|
}
|
|
|
|
nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
|
|
|
|
if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"invalid NTH16 signature <%#010x>\n",
|
|
le32_to_cpu(nth16->dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
len = le16_to_cpu(nth16->wBlockLength);
|
|
if (len > ctx->rx_max) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"unsupported NTB block length %u/%u\n", len,
|
|
ctx->rx_max);
|
|
goto error;
|
|
}
|
|
|
|
if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
|
|
(ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
|
|
!((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"sequence number glitch prev=%d curr=%d\n",
|
|
ctx->rx_seq, le16_to_cpu(nth16->wSequence));
|
|
}
|
|
ctx->rx_seq = le16_to_cpu(nth16->wSequence);
|
|
|
|
ret = le16_to_cpu(nth16->wNdpIndex);
|
|
error:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
|
|
|
|
/* verify NDP header and return number of datagrams, or negative error */
|
|
int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
|
|
{
|
|
struct usbnet *dev = netdev_priv(skb_in->dev);
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
int ret = -EINVAL;
|
|
|
|
if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
|
|
netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
|
|
ndpoffset);
|
|
goto error;
|
|
}
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
|
|
|
|
if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
|
|
netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
|
|
le16_to_cpu(ndp16->wLength));
|
|
goto error;
|
|
}
|
|
|
|
ret = ((le16_to_cpu(ndp16->wLength) -
|
|
sizeof(struct usb_cdc_ncm_ndp16)) /
|
|
sizeof(struct usb_cdc_ncm_dpe16));
|
|
ret--; /* we process NDP entries except for the last one */
|
|
|
|
if ((sizeof(struct usb_cdc_ncm_ndp16) +
|
|
ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
|
|
netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
error:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
|
|
|
|
int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
int len;
|
|
int nframes;
|
|
int x;
|
|
int offset;
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
struct usb_cdc_ncm_dpe16 *dpe16;
|
|
int ndpoffset;
|
|
int loopcount = 50; /* arbitrary max preventing infinite loop */
|
|
u32 payload = 0;
|
|
|
|
ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
|
|
if (ndpoffset < 0)
|
|
goto error;
|
|
|
|
next_ndp:
|
|
nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
|
|
if (nframes < 0)
|
|
goto error;
|
|
|
|
ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
|
|
|
|
if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"invalid DPT16 signature <%#010x>\n",
|
|
le32_to_cpu(ndp16->dwSignature));
|
|
goto err_ndp;
|
|
}
|
|
dpe16 = ndp16->dpe16;
|
|
|
|
for (x = 0; x < nframes; x++, dpe16++) {
|
|
offset = le16_to_cpu(dpe16->wDatagramIndex);
|
|
len = le16_to_cpu(dpe16->wDatagramLength);
|
|
|
|
/*
|
|
* CDC NCM ch. 3.7
|
|
* All entries after first NULL entry are to be ignored
|
|
*/
|
|
if ((offset == 0) || (len == 0)) {
|
|
if (!x)
|
|
goto err_ndp; /* empty NTB */
|
|
break;
|
|
}
|
|
|
|
/* sanity checking */
|
|
if (((offset + len) > skb_in->len) ||
|
|
(len > ctx->rx_max) || (len < ETH_HLEN)) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
|
|
x, offset, len, skb_in);
|
|
if (!x)
|
|
goto err_ndp;
|
|
break;
|
|
|
|
} else {
|
|
/* create a fresh copy to reduce truesize */
|
|
skb = netdev_alloc_skb_ip_align(dev->net, len);
|
|
if (!skb)
|
|
goto error;
|
|
memcpy(skb_put(skb, len), skb_in->data + offset, len);
|
|
usbnet_skb_return(dev, skb);
|
|
payload += len; /* count payload bytes in this NTB */
|
|
}
|
|
}
|
|
err_ndp:
|
|
/* are there more NDPs to process? */
|
|
ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
|
|
if (ndpoffset && loopcount--)
|
|
goto next_ndp;
|
|
|
|
/* update stats */
|
|
ctx->rx_overhead += skb_in->len - payload;
|
|
ctx->rx_ntbs++;
|
|
|
|
return 1;
|
|
error:
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
|
|
|
|
static void
|
|
cdc_ncm_speed_change(struct usbnet *dev,
|
|
struct usb_cdc_speed_change *data)
|
|
{
|
|
uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
|
|
uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
|
|
|
|
/*
|
|
* Currently the USB-NET API does not support reporting the actual
|
|
* device speed. Do print it instead.
|
|
*/
|
|
if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
|
|
netif_info(dev, link, dev->net,
|
|
"%u mbit/s downlink %u mbit/s uplink\n",
|
|
(unsigned int)(rx_speed / 1000000U),
|
|
(unsigned int)(tx_speed / 1000000U));
|
|
} else {
|
|
netif_info(dev, link, dev->net,
|
|
"%u kbit/s downlink %u kbit/s uplink\n",
|
|
(unsigned int)(rx_speed / 1000U),
|
|
(unsigned int)(tx_speed / 1000U));
|
|
}
|
|
}
|
|
|
|
static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
struct cdc_ncm_ctx *ctx;
|
|
struct usb_cdc_notification *event;
|
|
|
|
ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
|
|
if (urb->actual_length < sizeof(*event))
|
|
return;
|
|
|
|
/* test for split data in 8-byte chunks */
|
|
if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
|
|
cdc_ncm_speed_change(dev,
|
|
(struct usb_cdc_speed_change *)urb->transfer_buffer);
|
|
return;
|
|
}
|
|
|
|
event = urb->transfer_buffer;
|
|
|
|
switch (event->bNotificationType) {
|
|
case USB_CDC_NOTIFY_NETWORK_CONNECTION:
|
|
/*
|
|
* According to the CDC NCM specification ch.7.1
|
|
* USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
|
|
* sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
|
|
*/
|
|
netif_info(dev, link, dev->net,
|
|
"network connection: %sconnected\n",
|
|
!!event->wValue ? "" : "dis");
|
|
usbnet_link_change(dev, !!event->wValue, 0);
|
|
break;
|
|
|
|
case USB_CDC_NOTIFY_SPEED_CHANGE:
|
|
if (urb->actual_length < (sizeof(*event) +
|
|
sizeof(struct usb_cdc_speed_change)))
|
|
set_bit(EVENT_STS_SPLIT, &dev->flags);
|
|
else
|
|
cdc_ncm_speed_change(dev,
|
|
(struct usb_cdc_speed_change *)&event[1]);
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(&dev->udev->dev,
|
|
"NCM: unexpected notification 0x%02x!\n",
|
|
event->bNotificationType);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const struct driver_info cdc_ncm_info = {
|
|
.description = "CDC NCM",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
/* Same as cdc_ncm_info, but with FLAG_WWAN */
|
|
static const struct driver_info wwan_info = {
|
|
.description = "Mobile Broadband Network Device",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_WWAN,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
/* Same as wwan_info, but with FLAG_NOARP */
|
|
static const struct driver_info wwan_noarp_info = {
|
|
.description = "Mobile Broadband Network Device (NO ARP)",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_WWAN | FLAG_NOARP,
|
|
.bind = cdc_ncm_bind,
|
|
.unbind = cdc_ncm_unbind,
|
|
.manage_power = usbnet_manage_power,
|
|
.status = cdc_ncm_status,
|
|
.rx_fixup = cdc_ncm_rx_fixup,
|
|
.tx_fixup = cdc_ncm_tx_fixup,
|
|
};
|
|
|
|
static const struct usb_device_id cdc_devs[] = {
|
|
/* Ericsson MBM devices like F5521gw */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x0bdb,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* Dell branded MBM devices like DW5550 */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x413c,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* Toshiba branded MBM devices */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x0930,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long) &wwan_info,
|
|
},
|
|
|
|
/* tag Huawei devices as wwan */
|
|
{ USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM,
|
|
USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
|
|
/* Infineon(now Intel) HSPA Modem platform */
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_noarp_info,
|
|
},
|
|
|
|
/* Generic CDC-NCM devices */
|
|
{ USB_INTERFACE_INFO(USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&cdc_ncm_info,
|
|
},
|
|
{
|
|
},
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, cdc_devs);
|
|
|
|
static struct usb_driver cdc_ncm_driver = {
|
|
.name = "cdc_ncm",
|
|
.id_table = cdc_devs,
|
|
.probe = usbnet_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
.reset_resume = usbnet_resume,
|
|
.supports_autosuspend = 1,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(cdc_ncm_driver);
|
|
|
|
MODULE_AUTHOR("Hans Petter Selasky");
|
|
MODULE_DESCRIPTION("USB CDC NCM host driver");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|