| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Björn Mork | 3982 | 39.03% | 57 | 41.61% |
| Alexey Orishko | 2817 | 27.61% | 8 | 5.84% |
| Alexander Bersenev | 2325 | 22.79% | 2 | 1.46% |
| Enrico Mioso | 213 | 2.09% | 5 | 3.65% |
| Dan J Williams | 172 | 1.69% | 1 | 0.73% |
| Greg Suarez | 59 | 0.58% | 3 | 2.19% |
| Oliver Neukum | 58 | 0.57% | 5 | 3.65% |
| Jim Baxter | 55 | 0.54% | 2 | 1.46% |
| Giuseppe Scrivano | 55 | 0.54% | 1 | 0.73% |
| Tudor-Dan Ambarus | 51 | 0.50% | 1 | 0.73% |
| Daniele Palmas | 40 | 0.39% | 4 | 2.92% |
| Wei Shuai | 38 | 0.37% | 1 | 0.73% |
| Emil Renner Berthing | 29 | 0.28% | 1 | 0.73% |
| Jouni K. Seppänen | 26 | 0.25% | 1 | 0.73% |
| Grant Grundler | 25 | 0.25% | 2 | 1.46% |
| Miguel Rodríguez Pérez | 25 | 0.25% | 2 | 1.46% |
| Ben Chan | 21 | 0.21% | 1 | 0.73% |
| Dominik Czerwik | 19 | 0.19% | 1 | 0.73% |
| David S. Miller | 17 | 0.17% | 1 | 0.73% |
| Jarod Wilson | 16 | 0.16% | 1 | 0.73% |
| Ming Lei | 15 | 0.15% | 2 | 1.46% |
| Stefan Metzmacher | 14 | 0.14% | 1 | 0.73% |
| Sage Sharp | 14 | 0.14% | 1 | 0.73% |
| Rafal Redzimski | 12 | 0.12% | 1 | 0.73% |
| Yue haibing | 12 | 0.12% | 1 | 0.73% |
| Jesper Juhl | 9 | 0.09% | 1 | 0.73% |
| Arnd Bergmann | 8 | 0.08% | 1 | 0.73% |
| Lee Jones | 8 | 0.08% | 1 | 0.73% |
| Philippe Reynes | 8 | 0.08% | 1 | 0.73% |
| Ben Hutchings | 7 | 0.07% | 2 | 1.46% |
| Aleksander Morgado | 7 | 0.07% | 1 | 0.73% |
| Ben Dooks | 5 | 0.05% | 1 | 0.73% |
| Greg Ungerer | 4 | 0.04% | 1 | 0.73% |
| Peter Meiser | 4 | 0.04% | 1 | 0.73% |
| Yunbo Yu | 4 | 0.04% | 1 | 0.73% |
| Christophe Jaillet | 4 | 0.04% | 1 | 0.73% |
| Dan Carpenter | 3 | 0.03% | 3 | 2.19% |
| Johannes Berg | 3 | 0.03% | 3 | 2.19% |
| Devendra Naga | 2 | 0.02% | 1 | 0.73% |
| Zheng Yongjun | 2 | 0.02% | 1 | 0.73% |
| Joe Perches | 2 | 0.02% | 1 | 0.73% |
| Josh Boyer | 2 | 0.02% | 1 | 0.73% |
| Maciej Żenczykowski | 2 | 0.02% | 1 | 0.73% |
| yuan linyu | 2 | 0.02% | 1 | 0.73% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.73% |
| Thomas Meyer | 1 | 0.01% | 1 | 0.73% |
| Heiner Kallweit | 1 | 0.01% | 1 | 0.73% |
| Wang Qing | 1 | 0.01% | 1 | 0.73% |
| Stephen Hemminger | 1 | 0.01% | 1 | 0.73% |
| Arvind Yadav | 1 | 0.01% | 1 | 0.73% |
| Danny Kukawka | 1 | 0.01% | 1 | 0.73% |
| Total | 10203 | 137 |
/* * cdc_ncm.c * * Copyright (C) ST-Ericsson 2010-2012 * Contact: Alexey Orishko <alexey.orishko@stericsson.com> * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com> * * USB Host Driver for Network Control Model (NCM) * http://www.usb.org/developers/docs/devclass_docs/NCM10_012011.zip * * The NCM encoding, decoding and initialization logic * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h * * This software is available to you under a choice of one of two * licenses. You may choose this file to be licensed under the terms * of the GNU General Public License (GPL) Version 2 or the 2-clause * BSD license listed below: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/ctype.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/kstrtox.h> #include <linux/workqueue.h> #include <linux/mii.h> #include <linux/crc32.h> #include <linux/usb.h> #include <linux/hrtimer.h> #include <linux/atomic.h> #include <linux/usb/usbnet.h> #include <linux/usb/cdc.h> #include <linux/usb/cdc_ncm.h> #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) static bool prefer_mbim = true; #else static bool prefer_mbim; #endif module_param(prefer_mbim, bool, 0644); MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); static void cdc_ncm_txpath_bh(struct tasklet_struct *t); static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); static struct usb_driver cdc_ncm_driver; struct cdc_ncm_stats { char stat_string[ETH_GSTRING_LEN]; int sizeof_stat; int stat_offset; }; #define CDC_NCM_STAT(str, m) { \ .stat_string = str, \ .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ .stat_offset = offsetof(struct cdc_ncm_ctx, m) } #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), CDC_NCM_SIMPLE_STAT(tx_reason_timeout), CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), CDC_NCM_SIMPLE_STAT(tx_overhead), CDC_NCM_SIMPLE_STAT(tx_ntbs), CDC_NCM_SIMPLE_STAT(rx_overhead), CDC_NCM_SIMPLE_STAT(rx_ntbs), }; #define CDC_NCM_LOW_MEM_MAX_CNT 10 static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) { switch (sset) { case ETH_SS_STATS: return ARRAY_SIZE(cdc_ncm_gstrings_stats); default: return -EOPNOTSUPP; } } static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats __always_unused *stats, u64 *data) { struct usbnet *dev = netdev_priv(netdev); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; int i; char *p = NULL; for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; } } static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) { u8 *p = data; int i; switch (stringset) { case ETH_SS_STATS: for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); p += ETH_GSTRING_LEN; } } } static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); static const struct ethtool_ops cdc_ncm_ethtool_ops = { .get_link = usbnet_get_link, .nway_reset = usbnet_nway_reset, .get_drvinfo = usbnet_get_drvinfo, .get_msglevel = usbnet_get_msglevel, .set_msglevel = usbnet_set_msglevel, .get_ts_info = ethtool_op_get_ts_info, .get_sset_count = cdc_ncm_get_sset_count, .get_strings = cdc_ncm_get_strings, .get_ethtool_stats = cdc_ncm_get_ethtool_stats, .get_link_ksettings = usbnet_get_link_ksettings_internal, .set_link_ksettings = NULL, }; static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) { struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; u32 val, max, min; /* clamp new_rx to sane values */ min = USB_CDC_NCM_NTB_MIN_IN_SIZE; max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ if (max < min) { dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); max = min; } val = clamp_t(u32, new_rx, min, max); if (val != new_rx) dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); return val; } static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) { struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; u32 val, max, min; /* clamp new_tx to sane values */ if (ctx->is_ndp16) min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); else min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth32); if (le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) == 0) max = CDC_NCM_NTB_MAX_SIZE_TX; /* dwNtbOutMaxSize not set */ else max = clamp_t(u32, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize), USB_CDC_NCM_NTB_MIN_OUT_SIZE, CDC_NCM_NTB_MAX_SIZE_TX); /* some devices set dwNtbOutMaxSize too low for the above default */ min = min(min, max); val = clamp_t(u32, new_tx, min, max); if (val != new_tx) dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); return val; } static ssize_t min_tx_pkt_show(struct device *d, struct device_attribute *attr, char *buf) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; return sprintf(buf, "%u\n", ctx->min_tx_pkt); } static ssize_t rx_max_show(struct device *d, struct device_attribute *attr, char *buf) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; return sprintf(buf, "%u\n", ctx->rx_max); } static ssize_t tx_max_show(struct device *d, struct device_attribute *attr, char *buf) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; return sprintf(buf, "%u\n", ctx->tx_max); } static ssize_t tx_timer_usecs_show(struct device *d, struct device_attribute *attr, char *buf) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); } static ssize_t min_tx_pkt_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; unsigned long val; /* no need to restrict values - anything from 0 to infinity is OK */ if (kstrtoul(buf, 0, &val)) return -EINVAL; ctx->min_tx_pkt = val; return len; } static ssize_t rx_max_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; unsigned long val; if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) return -EINVAL; cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); return len; } static ssize_t tx_max_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; unsigned long val; if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) return -EINVAL; cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); return len; } static ssize_t tx_timer_usecs_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; ssize_t ret; unsigned long val; ret = kstrtoul(buf, 0, &val); if (ret) return ret; if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) return -EINVAL; spin_lock_bh(&ctx->mtx); ctx->timer_interval = val * NSEC_PER_USEC; if (!ctx->timer_interval) ctx->tx_timer_pending = 0; spin_unlock_bh(&ctx->mtx); return len; } static DEVICE_ATTR_RW(min_tx_pkt); static DEVICE_ATTR_RW(rx_max); static DEVICE_ATTR_RW(tx_max); static DEVICE_ATTR_RW(tx_timer_usecs); static ssize_t ndp_to_end_show(struct device *d, struct device_attribute *attr, char *buf) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); } static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) { struct usbnet *dev = netdev_priv(to_net_dev(d)); struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; bool enable; if (kstrtobool(buf, &enable)) return -EINVAL; /* no change? */ if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) return len; if (enable) { if (ctx->is_ndp16 && !ctx->delayed_ndp16) { ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); if (!ctx->delayed_ndp16) return -ENOMEM; } if (!ctx->is_ndp16 && !ctx->delayed_ndp32) { ctx->delayed_ndp32 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); if (!ctx->delayed_ndp32) return -ENOMEM; } } /* flush pending data before changing flag */ netif_tx_lock_bh(dev->net); usbnet_start_xmit(NULL, dev->net); spin_lock_bh(&ctx->mtx); if (enable) ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; else ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; spin_unlock_bh(&ctx->mtx); netif_tx_unlock_bh(dev->net); return len; } static DEVICE_ATTR_RW(ndp_to_end); #define NCM_PARM_ATTR(name, format, tocpu) \ static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ { \ struct usbnet *dev = netdev_priv(to_net_dev(d)); \ struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ } \ static DEVICE_ATTR(name, 0444, cdc_ncm_show_##name, NULL) NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); 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");
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