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![Tudor Ambarus](/assets/img/avatar_default.png)
Currently in cdc_ncm_check_tx_max(), if dwNtbOutMaxSize is lower than the calculated "min" value, but greater than zero, the logic sets tx_max to dwNtbOutMaxSize. This is then used to allocate a new SKB in cdc_ncm_fill_tx_frame() where all the data is handled. For small values of dwNtbOutMaxSize the memory allocated during alloc_skb(dwNtbOutMaxSize, GFP_ATOMIC) will have the same size, due to how size is aligned at alloc time: size = SKB_DATA_ALIGN(size); size += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); Thus we hit the same bug that we tried to squash with commit2be6d4d16a
("net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero") Low values of dwNtbOutMaxSize do not cause an issue presently because at alloc_skb() time more memory (512b) is allocated than required for the SKB headers alone (320b), leaving some space (512b - 320b = 192b) for CDC data (172b). However, if more elements (for example 3 x u64 = [24b]) were added to one of the SKB header structs, say 'struct skb_shared_info', increasing its original size (320b [320b aligned]) to something larger (344b [384b aligned]), then suddenly the CDC data (172b) no longer fits in the spare SKB data area (512b - 384b = 128b). Consequently the SKB bounds checking semantics fails and panics: skbuff: skb_over_panic: text:ffffffff831f755b len:184 put:172 head:ffff88811f1c6c00 data:ffff88811f1c6c00 tail:0xb8 end:0x80 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:113! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 57 Comm: kworker/0:2 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Workqueue: mld mld_ifc_work RIP: 0010:skb_panic net/core/skbuff.c:113 [inline] RIP: 0010:skb_over_panic+0x14c/0x150 net/core/skbuff.c:118 [snip] Call Trace: <TASK> skb_put+0x151/0x210 net/core/skbuff.c:2047 skb_put_zero include/linux/skbuff.h:2422 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1131 [inline] cdc_ncm_fill_tx_frame+0x11ab/0x3da0 drivers/net/usb/cdc_ncm.c:1308 cdc_ncm_tx_fixup+0xa3/0x100 Deal with too low values of dwNtbOutMaxSize, clamp it in the range [USB_CDC_NCM_NTB_MIN_OUT_SIZE, CDC_NCM_NTB_MAX_SIZE_TX]. We ensure enough data space is allocated to handle CDC data by making sure dwNtbOutMaxSize is not smaller than USB_CDC_NCM_NTB_MIN_OUT_SIZE. Fixes:289507d336
("net: cdc_ncm: use sysfs for rx/tx aggregation tuning") Cc: stable@vger.kernel.org Reported-by: syzbot+9f575a1f15fc0c01ed69@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=b982f1059506db48409d Link: https://lore.kernel.org/all/20211202143437.1411410-1-lee.jones@linaro.org/ Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230517133808.1873695-2-tudor.ambarus@linaro.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2070 lines
62 KiB
C
2070 lines
62 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/docs/devclass_docs/NCM10_012011.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/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/kstrtox.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, 0644);
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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(struct tasklet_struct *t);
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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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#define CDC_NCM_LOW_MEM_MAX_CNT 10
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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_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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.get_link_ksettings = usbnet_get_link_ksettings_internal,
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.set_link_ksettings = NULL,
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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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if (ctx->is_ndp16)
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min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
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else
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min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth32);
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if (le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) == 0)
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max = CDC_NCM_NTB_MAX_SIZE_TX; /* dwNtbOutMaxSize not set */
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else
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max = clamp_t(u32, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize),
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USB_CDC_NCM_NTB_MIN_OUT_SIZE,
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CDC_NCM_NTB_MAX_SIZE_TX);
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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 min_tx_pkt_show(struct device *d,
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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 rx_max_show(struct device *d,
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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 tx_max_show(struct device *d,
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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 tx_timer_usecs_show(struct device *d,
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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 min_tx_pkt_store(struct device *d,
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struct device_attribute *attr,
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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 rx_max_store(struct device *d,
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struct device_attribute *attr,
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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 tx_max_store(struct device *d,
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struct device_attribute *attr,
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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 tx_timer_usecs_store(struct device *d,
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struct device_attribute *attr,
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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_RW(min_tx_pkt);
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static DEVICE_ATTR_RW(rx_max);
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static DEVICE_ATTR_RW(tx_max);
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static DEVICE_ATTR_RW(tx_timer_usecs);
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static ssize_t ndp_to_end_show(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, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N');
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}
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static ssize_t ndp_to_end_store(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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bool enable;
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if (kstrtobool(buf, &enable))
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return -EINVAL;
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/* no change? */
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if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
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return len;
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if (enable) {
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if (ctx->is_ndp16 && !ctx->delayed_ndp16) {
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ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
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if (!ctx->delayed_ndp16)
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return -ENOMEM;
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}
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if (!ctx->is_ndp16 && !ctx->delayed_ndp32) {
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ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
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if (!ctx->delayed_ndp32)
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return -ENOMEM;
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}
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}
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/* flush pending data before changing flag */
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netif_tx_lock_bh(dev->net);
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usbnet_start_xmit(NULL, dev->net);
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spin_lock_bh(&ctx->mtx);
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if (enable)
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ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END;
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else
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ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END;
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spin_unlock_bh(&ctx->mtx);
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netif_tx_unlock_bh(dev->net);
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return len;
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}
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static DEVICE_ATTR_RW(ndp_to_end);
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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, 0444, 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);
|
|
NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu);
|
|
NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu);
|
|
NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu);
|
|
NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu);
|
|
NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu);
|
|
NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu);
|
|
NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu);
|
|
|
|
static struct attribute *cdc_ncm_sysfs_attrs[] = {
|
|
&dev_attr_min_tx_pkt.attr,
|
|
&dev_attr_ndp_to_end.attr,
|
|
&dev_attr_rx_max.attr,
|
|
&dev_attr_tx_max.attr,
|
|
&dev_attr_tx_timer_usecs.attr,
|
|
&dev_attr_bmNtbFormatsSupported.attr,
|
|
&dev_attr_dwNtbInMaxSize.attr,
|
|
&dev_attr_wNdpInDivisor.attr,
|
|
&dev_attr_wNdpInPayloadRemainder.attr,
|
|
&dev_attr_wNdpInAlignment.attr,
|
|
&dev_attr_dwNtbOutMaxSize.attr,
|
|
&dev_attr_wNdpOutDivisor.attr,
|
|
&dev_attr_wNdpOutPayloadRemainder.attr,
|
|
&dev_attr_wNdpOutAlignment.attr,
|
|
&dev_attr_wNtbOutMaxDatagrams.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group cdc_ncm_sysfs_attr_group = {
|
|
.name = "cdc_ncm",
|
|
.attrs = cdc_ncm_sysfs_attrs,
|
|
};
|
|
|
|
/* handle rx_max and tx_max changes */
|
|
static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
|
|
u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
|
|
u32 val;
|
|
|
|
val = cdc_ncm_check_rx_max(dev, new_rx);
|
|
|
|
/* inform device about NTB input size changes */
|
|
if (val != ctx->rx_max) {
|
|
__le32 dwNtbInMaxSize = cpu_to_le32(val);
|
|
|
|
dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
|
|
|
|
/* tell device to use new size */
|
|
if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
|
|
USB_TYPE_CLASS | USB_DIR_OUT
|
|
| USB_RECIP_INTERFACE,
|
|
0, iface_no, &dwNtbInMaxSize, 4) < 0)
|
|
dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
|
|
else
|
|
ctx->rx_max = val;
|
|
}
|
|
|
|
/* usbnet use these values for sizing rx queues */
|
|
if (dev->rx_urb_size != ctx->rx_max) {
|
|
dev->rx_urb_size = ctx->rx_max;
|
|
if (netif_running(dev->net))
|
|
usbnet_unlink_rx_urbs(dev);
|
|
}
|
|
|
|
val = cdc_ncm_check_tx_max(dev, new_tx);
|
|
if (val != ctx->tx_max)
|
|
dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
|
|
|
|
/* Adding a pad byte here if necessary simplifies the handling
|
|
* in cdc_ncm_fill_tx_frame, making tx_max always represent
|
|
* the real skb max size.
|
|
*
|
|
* We cannot use dev->maxpacket here because this is called from
|
|
* .bind which is called before usbnet sets up dev->maxpacket
|
|
*/
|
|
if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
|
|
val % usb_maxpacket(dev->udev, dev->out) == 0)
|
|
val++;
|
|
|
|
/* we might need to flush any pending tx buffers if running */
|
|
if (netif_running(dev->net) && val > ctx->tx_max) {
|
|
netif_tx_lock_bh(dev->net);
|
|
usbnet_start_xmit(NULL, dev->net);
|
|
/* make sure tx_curr_skb is reallocated if it was empty */
|
|
if (ctx->tx_curr_skb) {
|
|
dev_kfree_skb_any(ctx->tx_curr_skb);
|
|
ctx->tx_curr_skb = NULL;
|
|
}
|
|
ctx->tx_max = val;
|
|
netif_tx_unlock_bh(dev->net);
|
|
} else {
|
|
ctx->tx_max = val;
|
|
}
|
|
|
|
dev->hard_mtu = ctx->tx_max;
|
|
|
|
/* max qlen depend on hard_mtu and rx_urb_size */
|
|
usbnet_update_max_qlen(dev);
|
|
|
|
/* 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),
|
|
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");
|
|
}
|
|
|
|
/* use ndp16 by default */
|
|
ctx->is_ndp16 = 1;
|
|
|
|
/* 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) {
|
|
if (ctx->drvflags & CDC_NCM_FLAG_PREFER_NTB32) {
|
|
ctx->is_ndp16 = 0;
|
|
dev_dbg(&dev->intf->dev, "Setting NTB format to 32-bit\n");
|
|
err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
|
|
USB_TYPE_CLASS | USB_DIR_OUT
|
|
| USB_RECIP_INTERFACE,
|
|
USB_CDC_NCM_NTB32_FORMAT,
|
|
iface_no, NULL, 0);
|
|
} else {
|
|
ctx->is_ndp16 = 1;
|
|
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) {
|
|
ctx->is_ndp16 = 1;
|
|
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 */
|
|
if (ctx->is_ndp16)
|
|
ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
|
|
else
|
|
ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp32) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe32);
|
|
|
|
/* 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, sizeof(max_datagram_size));
|
|
if (err != sizeof(max_datagram_size)) {
|
|
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, sizeof(max_datagram_size));
|
|
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 operator 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 initial 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;
|
|
|
|
/* ignore endpoints which cannot transfer data */
|
|
if (!usb_endpoint_maxp(&e->desc))
|
|
continue;
|
|
|
|
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;
|
|
}
|
|
|
|
if (ctx->is_ndp16)
|
|
kfree(ctx->delayed_ndp16);
|
|
else
|
|
kfree(ctx->delayed_ndp32);
|
|
|
|
kfree(ctx);
|
|
}
|
|
|
|
/* we need to override the usbnet change_mtu ndo for two reasons:
|
|
* - respect the negotiated maximum datagram size
|
|
* - avoid unwanted changes to rx and tx buffers
|
|
*/
|
|
int cdc_ncm_change_mtu(struct net_device *net, int new_mtu)
|
|
{
|
|
struct usbnet *dev = netdev_priv(net);
|
|
|
|
net->mtu = new_mtu;
|
|
cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu);
|
|
|
|
static const struct net_device_ops cdc_ncm_netdev_ops = {
|
|
.ndo_open = usbnet_open,
|
|
.ndo_stop = usbnet_stop,
|
|
.ndo_start_xmit = usbnet_start_xmit,
|
|
.ndo_tx_timeout = usbnet_tx_timeout,
|
|
.ndo_set_rx_mode = usbnet_set_rx_mode,
|
|
.ndo_get_stats64 = dev_get_tstats64,
|
|
.ndo_change_mtu = cdc_ncm_change_mtu,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags)
|
|
{
|
|
struct cdc_ncm_ctx *ctx;
|
|
struct usb_driver *driver;
|
|
u8 *buf;
|
|
int len;
|
|
int temp;
|
|
u8 iface_no;
|
|
struct usb_cdc_parsed_header hdr;
|
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->dev = dev;
|
|
|
|
hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
|
|
tasklet_setup(&ctx->bh, 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 */
|
|
cdc_parse_cdc_header(&hdr, intf, buf, len);
|
|
|
|
if (hdr.usb_cdc_union_desc)
|
|
ctx->data = usb_ifnum_to_if(dev->udev,
|
|
hdr.usb_cdc_union_desc->bSlaveInterface0);
|
|
ctx->ether_desc = hdr.usb_cdc_ether_desc;
|
|
ctx->func_desc = hdr.usb_cdc_ncm_desc;
|
|
ctx->mbim_desc = hdr.usb_cdc_mbim_desc;
|
|
ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc;
|
|
|
|
/* some buggy devices have an IAD but no CDC Union */
|
|
if (!hdr.usb_cdc_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_err(&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_err(&intf->dev, "MBIM functional descriptor missing\n");
|
|
goto error;
|
|
}
|
|
} else {
|
|
if (!ctx->ether_desc || !ctx->func_desc) {
|
|
dev_err(&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_err(&intf->dev, "failed to claim data intf\n");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
|
|
|
|
/* Device-specific flags */
|
|
ctx->drvflags = drvflags;
|
|
|
|
/* Reset data interface. Some devices will not reset properly
|
|
* unless they are configured first. Toggle the altsetting to
|
|
* force a reset.
|
|
* Some other devices do not work properly with this procedure
|
|
* that can be avoided using quirk CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE
|
|
*/
|
|
if (!(ctx->drvflags & CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE))
|
|
usb_set_interface(dev->udev, iface_no, data_altsetting);
|
|
|
|
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;
|
|
|
|
/* Some firmwares need a pause here or they will silently fail
|
|
* to set up the interface properly. This value was decided
|
|
* empirically on a Sierra Wireless MC7455 running 02.08.02.00
|
|
* firmware.
|
|
*/
|
|
usleep_range(10000, 20000);
|
|
|
|
/* 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->control, dev);
|
|
|
|
if (ctx->ether_desc) {
|
|
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
|
|
if (temp) {
|
|
dev_err(&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);
|
|
|
|
/* Allocate the delayed NDP if needed. */
|
|
if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
|
|
if (ctx->is_ndp16) {
|
|
ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
|
|
if (!ctx->delayed_ndp16)
|
|
goto error2;
|
|
} else {
|
|
ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL);
|
|
if (!ctx->delayed_ndp32)
|
|
goto error2;
|
|
}
|
|
dev_info(&intf->dev, "NDP will be placed at end of frame for this device.");
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* must handle MTU changes */
|
|
dev->net->netdev_ops = &cdc_ncm_netdev_ops;
|
|
dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev);
|
|
|
|
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);
|
|
|
|
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)
|
|
{
|
|
/* MBIM backwards compatible function? */
|
|
if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
|
|
return -ENODEV;
|
|
|
|
/* The NCM data altsetting is fixed, so we hard-coded it.
|
|
* Additionally, generic NCM devices are assumed to accept arbitrarily
|
|
* placed NDP.
|
|
*/
|
|
return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0);
|
|
}
|
|
|
|
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)
|
|
skb_put_zero(skb, 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_ndp16(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);
|
|
|
|
/* If NDP should be moved to the end of the NCM package, we can't follow the
|
|
* NTH16 header as we would normally do. NDP isn't written to the SKB yet, and
|
|
* the wNdpIndex field in the header is actually not consistent with reality. It will be later.
|
|
*/
|
|
if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
|
|
if (ctx->delayed_ndp16->dwSignature == sign)
|
|
return ctx->delayed_ndp16;
|
|
|
|
/* We can only push a single NDP to the end. Return
|
|
* NULL to send what we've already got and queue this
|
|
* skb for later.
|
|
*/
|
|
else if (ctx->delayed_ndp16->dwSignature)
|
|
return NULL;
|
|
}
|
|
|
|
/* 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 */
|
|
if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
|
|
cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size);
|
|
|
|
/* verify that there is room for the NDP and the datagram (reserve) */
|
|
if ((ctx->tx_curr_size - 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 */
|
|
if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
|
|
ndp16 = skb_put_zero(skb, ctx->max_ndp_size);
|
|
else
|
|
ndp16 = ctx->delayed_ndp16;
|
|
|
|
ndp16->dwSignature = sign;
|
|
ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
|
|
return ndp16;
|
|
}
|
|
|
|
static struct usb_cdc_ncm_ndp32 *cdc_ncm_ndp32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
|
|
{
|
|
struct usb_cdc_ncm_ndp32 *ndp32 = NULL;
|
|
struct usb_cdc_ncm_nth32 *nth32 = (void *)skb->data;
|
|
size_t ndpoffset = le32_to_cpu(nth32->dwNdpIndex);
|
|
|
|
/* If NDP should be moved to the end of the NCM package, we can't follow the
|
|
* NTH32 header as we would normally do. NDP isn't written to the SKB yet, and
|
|
* the wNdpIndex field in the header is actually not consistent with reality. It will be later.
|
|
*/
|
|
if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
|
|
if (ctx->delayed_ndp32->dwSignature == sign)
|
|
return ctx->delayed_ndp32;
|
|
|
|
/* We can only push a single NDP to the end. Return
|
|
* NULL to send what we've already got and queue this
|
|
* skb for later.
|
|
*/
|
|
else if (ctx->delayed_ndp32->dwSignature)
|
|
return NULL;
|
|
}
|
|
|
|
/* follow the chain of NDPs, looking for a match */
|
|
while (ndpoffset) {
|
|
ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb->data + ndpoffset);
|
|
if (ndp32->dwSignature == sign)
|
|
return ndp32;
|
|
ndpoffset = le32_to_cpu(ndp32->dwNextNdpIndex);
|
|
}
|
|
|
|
/* align new NDP */
|
|
if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
|
|
cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size);
|
|
|
|
/* verify that there is room for the NDP and the datagram (reserve) */
|
|
if ((ctx->tx_curr_size - skb->len - reserve) < ctx->max_ndp_size)
|
|
return NULL;
|
|
|
|
/* link to it */
|
|
if (ndp32)
|
|
ndp32->dwNextNdpIndex = cpu_to_le32(skb->len);
|
|
else
|
|
nth32->dwNdpIndex = cpu_to_le32(skb->len);
|
|
|
|
/* push a new empty NDP */
|
|
if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END))
|
|
ndp32 = skb_put_zero(skb, ctx->max_ndp_size);
|
|
else
|
|
ndp32 = ctx->delayed_ndp32;
|
|
|
|
ndp32->dwSignature = sign;
|
|
ndp32->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp32) + sizeof(struct usb_cdc_ncm_dpe32));
|
|
return ndp32;
|
|
}
|
|
|
|
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];
|
|
union {
|
|
struct usb_cdc_ncm_nth16 *nth16;
|
|
struct usb_cdc_ncm_nth32 *nth32;
|
|
} nth;
|
|
union {
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
struct usb_cdc_ncm_ndp32 *ndp32;
|
|
} ndp;
|
|
struct sk_buff *skb_out;
|
|
u16 n = 0, index, ndplen;
|
|
u8 ready2send = 0;
|
|
u32 delayed_ndp_size;
|
|
size_t padding_count;
|
|
|
|
/* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated
|
|
* accordingly. Otherwise, we should check here.
|
|
*/
|
|
if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)
|
|
delayed_ndp_size = ctx->max_ndp_size +
|
|
max_t(u32,
|
|
ctx->tx_ndp_modulus,
|
|
ctx->tx_modulus + ctx->tx_remainder) - 1;
|
|
else
|
|
delayed_ndp_size = 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) {
|
|
if (ctx->tx_low_mem_val == 0) {
|
|
ctx->tx_curr_size = ctx->tx_max;
|
|
skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
|
|
/* If the memory allocation fails we will wait longer
|
|
* each time before attempting another full size
|
|
* allocation again to not overload the system
|
|
* further.
|
|
*/
|
|
if (skb_out == NULL) {
|
|
/* If even the smallest allocation fails, abort. */
|
|
if (ctx->tx_curr_size == USB_CDC_NCM_NTB_MIN_OUT_SIZE)
|
|
goto alloc_failed;
|
|
ctx->tx_low_mem_max_cnt = min(ctx->tx_low_mem_max_cnt + 1,
|
|
(unsigned)CDC_NCM_LOW_MEM_MAX_CNT);
|
|
ctx->tx_low_mem_val = ctx->tx_low_mem_max_cnt;
|
|
}
|
|
}
|
|
if (skb_out == NULL) {
|
|
/* See if a very small allocation is possible.
|
|
* We will send this packet immediately and hope
|
|
* that there is more memory available later.
|
|
*/
|
|
if (skb)
|
|
ctx->tx_curr_size = max(skb->len,
|
|
(u32)USB_CDC_NCM_NTB_MIN_OUT_SIZE);
|
|
else
|
|
ctx->tx_curr_size = USB_CDC_NCM_NTB_MIN_OUT_SIZE;
|
|
skb_out = alloc_skb(ctx->tx_curr_size, GFP_ATOMIC);
|
|
|
|
/* No allocation possible so we will abort */
|
|
if (!skb_out)
|
|
goto alloc_failed;
|
|
ctx->tx_low_mem_val--;
|
|
}
|
|
if (ctx->is_ndp16) {
|
|
/* fill out the initial 16-bit NTB header */
|
|
nth.nth16 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth16));
|
|
nth.nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
|
|
nth.nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
|
|
nth.nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
|
|
} else {
|
|
/* fill out the initial 32-bit NTB header */
|
|
nth.nth32 = skb_put_zero(skb_out, sizeof(struct usb_cdc_ncm_nth32));
|
|
nth.nth32->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH32_SIGN);
|
|
nth.nth32->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth32));
|
|
nth.nth32->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 */
|
|
if (ctx->is_ndp16)
|
|
ndp.ndp16 = cdc_ncm_ndp16(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
|
|
else
|
|
ndp.ndp32 = cdc_ncm_ndp32(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_curr_size);
|
|
|
|
/* check if we had enough room left for both NDP and frame */
|
|
if ((ctx->is_ndp16 && !ndp.ndp16) || (!ctx->is_ndp16 && !ndp.ndp32) ||
|
|
skb_out->len + skb->len + delayed_ndp_size > ctx->tx_curr_size) {
|
|
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 within this NDP */
|
|
if (ctx->is_ndp16) {
|
|
ndplen = le16_to_cpu(ndp.ndp16->wLength);
|
|
index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
|
|
|
|
/* OK, add this skb */
|
|
ndp.ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
|
|
ndp.ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
|
|
ndp.ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
|
|
} else {
|
|
ndplen = le16_to_cpu(ndp.ndp32->wLength);
|
|
index = (ndplen - sizeof(struct usb_cdc_ncm_ndp32)) / sizeof(struct usb_cdc_ncm_dpe32) - 1;
|
|
|
|
ndp.ndp32->dpe32[index].dwDatagramLength = cpu_to_le32(skb->len);
|
|
ndp.ndp32->dpe32[index].dwDatagramIndex = cpu_to_le32(skb_out->len);
|
|
ndp.ndp32->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe32));
|
|
}
|
|
skb_put_data(skb_out, 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 requested, put NDP at end of frame. */
|
|
if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) {
|
|
if (ctx->is_ndp16) {
|
|
nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
|
|
cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
|
|
nth.nth16->wNdpIndex = cpu_to_le16(skb_out->len);
|
|
skb_put_data(skb_out, ctx->delayed_ndp16, ctx->max_ndp_size);
|
|
|
|
/* Zero out delayed NDP - signature checking will naturally fail. */
|
|
ndp.ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size);
|
|
} else {
|
|
nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
|
|
cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_curr_size - ctx->max_ndp_size);
|
|
nth.nth32->dwNdpIndex = cpu_to_le32(skb_out->len);
|
|
skb_put_data(skb_out, ctx->delayed_ndp32, ctx->max_ndp_size);
|
|
|
|
ndp.ndp32 = memset(ctx->delayed_ndp32, 0, ctx->max_ndp_size);
|
|
}
|
|
}
|
|
|
|
/* 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) {
|
|
padding_count = ctx->tx_curr_size - skb_out->len;
|
|
if (!WARN_ON(padding_count > ctx->tx_curr_size))
|
|
skb_put_zero(skb_out, padding_count);
|
|
} else if (skb_out->len < ctx->tx_curr_size &&
|
|
(skb_out->len % dev->maxpacket) == 0) {
|
|
skb_put_u8(skb_out, 0); /* force short packet */
|
|
}
|
|
|
|
/* set final frame length */
|
|
if (ctx->is_ndp16) {
|
|
nth.nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
|
|
nth.nth16->wBlockLength = cpu_to_le16(skb_out->len);
|
|
} else {
|
|
nth.nth32 = (struct usb_cdc_ncm_nth32 *)skb_out->data;
|
|
nth.nth32->dwBlockLength = cpu_to_le32(skb_out->len);
|
|
}
|
|
|
|
/* return skb */
|
|
ctx->tx_curr_skb = NULL;
|
|
|
|
/* keep private stats: framing overhead and number of NTBs */
|
|
ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
|
|
ctx->tx_ntbs++;
|
|
|
|
/* usbnet will count all the framing overhead by default.
|
|
* Adjust the stats so that the tx_bytes counter show real
|
|
* payload data instead.
|
|
*/
|
|
usbnet_set_skb_tx_stats(skb_out, n,
|
|
(long)ctx->tx_curr_frame_payload - skb_out->len);
|
|
|
|
return skb_out;
|
|
|
|
alloc_failed:
|
|
if (skb) {
|
|
dev_kfree_skb_any(skb);
|
|
dev->net->stats.tx_dropped++;
|
|
}
|
|
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,
|
|
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(struct tasklet_struct *t)
|
|
{
|
|
struct cdc_ncm_ctx *ctx = from_tasklet(ctx, t, bh);
|
|
struct usbnet *dev = ctx->dev;
|
|
|
|
spin_lock(&ctx->mtx);
|
|
if (ctx->tx_timer_pending != 0) {
|
|
ctx->tx_timer_pending--;
|
|
cdc_ncm_tx_timeout_start(ctx);
|
|
spin_unlock(&ctx->mtx);
|
|
} else if (dev->net != NULL) {
|
|
ctx->tx_reason_timeout++; /* count reason for transmitting */
|
|
spin_unlock(&ctx->mtx);
|
|
netif_tx_lock_bh(dev->net);
|
|
usbnet_start_xmit(NULL, dev->net);
|
|
netif_tx_unlock_bh(dev->net);
|
|
} else {
|
|
spin_unlock(&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);
|
|
|
|
if (ctx->is_ndp16)
|
|
skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
|
|
else
|
|
skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP32_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);
|
|
|
|
int cdc_ncm_rx_verify_nth32(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
|
|
{
|
|
struct usbnet *dev = netdev_priv(skb_in->dev);
|
|
struct usb_cdc_ncm_nth32 *nth32;
|
|
int len;
|
|
int ret = -EINVAL;
|
|
|
|
if (ctx == NULL)
|
|
goto error;
|
|
|
|
if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth32) +
|
|
sizeof(struct usb_cdc_ncm_ndp32))) {
|
|
netif_dbg(dev, rx_err, dev->net, "frame too short\n");
|
|
goto error;
|
|
}
|
|
|
|
nth32 = (struct usb_cdc_ncm_nth32 *)skb_in->data;
|
|
|
|
if (nth32->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH32_SIGN)) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"invalid NTH32 signature <%#010x>\n",
|
|
le32_to_cpu(nth32->dwSignature));
|
|
goto error;
|
|
}
|
|
|
|
len = le32_to_cpu(nth32->dwBlockLength);
|
|
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(nth32->wSequence) &&
|
|
(ctx->rx_seq || le16_to_cpu(nth32->wSequence)) &&
|
|
!((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth32->wSequence))) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"sequence number glitch prev=%d curr=%d\n",
|
|
ctx->rx_seq, le16_to_cpu(nth32->wSequence));
|
|
}
|
|
ctx->rx_seq = le16_to_cpu(nth32->wSequence);
|
|
|
|
ret = le32_to_cpu(nth32->dwNdpIndex);
|
|
error:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth32);
|
|
|
|
/* 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);
|
|
|
|
/* verify NDP header and return number of datagrams, or negative error */
|
|
int cdc_ncm_rx_verify_ndp32(struct sk_buff *skb_in, int ndpoffset)
|
|
{
|
|
struct usbnet *dev = netdev_priv(skb_in->dev);
|
|
struct usb_cdc_ncm_ndp32 *ndp32;
|
|
int ret = -EINVAL;
|
|
|
|
if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp32)) > skb_in->len) {
|
|
netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
|
|
ndpoffset);
|
|
goto error;
|
|
}
|
|
ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
|
|
|
|
if (le16_to_cpu(ndp32->wLength) < USB_CDC_NCM_NDP32_LENGTH_MIN) {
|
|
netif_dbg(dev, rx_err, dev->net, "invalid DPT32 length <%u>\n",
|
|
le16_to_cpu(ndp32->wLength));
|
|
goto error;
|
|
}
|
|
|
|
ret = ((le16_to_cpu(ndp32->wLength) -
|
|
sizeof(struct usb_cdc_ncm_ndp32)) /
|
|
sizeof(struct usb_cdc_ncm_dpe32));
|
|
ret--; /* we process NDP entries except for the last one */
|
|
|
|
if ((sizeof(struct usb_cdc_ncm_ndp32) +
|
|
ret * (sizeof(struct usb_cdc_ncm_dpe32))) > 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_ndp32);
|
|
|
|
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];
|
|
unsigned int len;
|
|
int nframes;
|
|
int x;
|
|
unsigned int offset;
|
|
union {
|
|
struct usb_cdc_ncm_ndp16 *ndp16;
|
|
struct usb_cdc_ncm_ndp32 *ndp32;
|
|
} ndp;
|
|
union {
|
|
struct usb_cdc_ncm_dpe16 *dpe16;
|
|
struct usb_cdc_ncm_dpe32 *dpe32;
|
|
} dpe;
|
|
|
|
int ndpoffset;
|
|
int loopcount = 50; /* arbitrary max preventing infinite loop */
|
|
u32 payload = 0;
|
|
|
|
if (ctx->is_ndp16)
|
|
ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
|
|
else
|
|
ndpoffset = cdc_ncm_rx_verify_nth32(ctx, skb_in);
|
|
|
|
if (ndpoffset < 0)
|
|
goto error;
|
|
|
|
next_ndp:
|
|
if (ctx->is_ndp16) {
|
|
nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
|
|
if (nframes < 0)
|
|
goto error;
|
|
|
|
ndp.ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
|
|
|
|
if (ndp.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(ndp.ndp16->dwSignature));
|
|
goto err_ndp;
|
|
}
|
|
dpe.dpe16 = ndp.ndp16->dpe16;
|
|
} else {
|
|
nframes = cdc_ncm_rx_verify_ndp32(skb_in, ndpoffset);
|
|
if (nframes < 0)
|
|
goto error;
|
|
|
|
ndp.ndp32 = (struct usb_cdc_ncm_ndp32 *)(skb_in->data + ndpoffset);
|
|
|
|
if (ndp.ndp32->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP32_NOCRC_SIGN)) {
|
|
netif_dbg(dev, rx_err, dev->net,
|
|
"invalid DPT32 signature <%#010x>\n",
|
|
le32_to_cpu(ndp.ndp32->dwSignature));
|
|
goto err_ndp;
|
|
}
|
|
dpe.dpe32 = ndp.ndp32->dpe32;
|
|
}
|
|
|
|
for (x = 0; x < nframes; x++) {
|
|
if (ctx->is_ndp16) {
|
|
offset = le16_to_cpu(dpe.dpe16->wDatagramIndex);
|
|
len = le16_to_cpu(dpe.dpe16->wDatagramLength);
|
|
} else {
|
|
offset = le32_to_cpu(dpe.dpe32->dwDatagramIndex);
|
|
len = le32_to_cpu(dpe.dpe32->dwDatagramLength);
|
|
}
|
|
|
|
/*
|
|
* 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 - watch out for integer wrap*/
|
|
if ((offset > skb_in->len) || (len > skb_in->len - offset) ||
|
|
(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;
|
|
skb_put_data(skb, skb_in->data + offset, len);
|
|
usbnet_skb_return(dev, skb);
|
|
payload += len; /* count payload bytes in this NTB */
|
|
}
|
|
|
|
if (ctx->is_ndp16)
|
|
dpe.dpe16++;
|
|
else
|
|
dpe.dpe32++;
|
|
}
|
|
err_ndp:
|
|
/* are there more NDPs to process? */
|
|
if (ctx->is_ndp16)
|
|
ndpoffset = le16_to_cpu(ndp.ndp16->wNextNdpIndex);
|
|
else
|
|
ndpoffset = le32_to_cpu(ndp.ndp32->dwNextNdpIndex);
|
|
|
|
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)
|
|
{
|
|
/* RTL8156 shipped before 2021 sends notification about every 32ms. */
|
|
dev->rx_speed = le32_to_cpu(data->DLBitRRate);
|
|
dev->tx_speed = le32_to_cpu(data->ULBitRate);
|
|
}
|
|
|
|
static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
struct usb_cdc_notification *event;
|
|
|
|
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.
|
|
*/
|
|
/* RTL8156 shipped before 2021 sends notification about
|
|
* every 32ms. Don't forward notification if state is same.
|
|
*/
|
|
if (netif_carrier_ok(dev->net) != !!event->wValue)
|
|
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 (NO ZLP)",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_LINK_INTR | FLAG_ETHER,
|
|
.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,
|
|
.set_rx_mode = usbnet_cdc_update_filter,
|
|
};
|
|
|
|
/* Same as cdc_ncm_info, but with FLAG_SEND_ZLP */
|
|
static const struct driver_info cdc_ncm_zlp_info = {
|
|
.description = "CDC NCM (SEND ZLP)",
|
|
.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
|
|
| FLAG_LINK_INTR | FLAG_ETHER | FLAG_SEND_ZLP,
|
|
.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,
|
|
.set_rx_mode = usbnet_cdc_update_filter,
|
|
};
|
|
|
|
/* 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_LINK_INTR | 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,
|
|
.set_rx_mode = usbnet_cdc_update_filter,
|
|
};
|
|
|
|
/* 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_LINK_INTR | 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,
|
|
.set_rx_mode = usbnet_cdc_update_filter,
|
|
};
|
|
|
|
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,
|
|
},
|
|
|
|
/* Telit LE910 V2 */
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_noarp_info,
|
|
},
|
|
|
|
/* DW5812 LTE Verizon Mobile Broadband Card
|
|
* Unlike DW5550 this device requires FLAG_NOARP
|
|
*/
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_noarp_info,
|
|
},
|
|
|
|
/* DW5813 LTE AT&T Mobile Broadband Card
|
|
* Unlike DW5550 this device requires FLAG_NOARP
|
|
*/
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_noarp_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,
|
|
},
|
|
|
|
/* u-blox TOBY-L4 */
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(0x1546, 0x1010,
|
|
USB_CLASS_COMM,
|
|
USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
|
|
.driver_info = (unsigned long)&wwan_info,
|
|
},
|
|
|
|
/* DisplayLink docking stations */
|
|
{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
|
|
| USB_DEVICE_ID_MATCH_VENDOR,
|
|
.idVendor = 0x17e9,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.driver_info = (unsigned long)&cdc_ncm_zlp_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");
|