// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2012 Smith Micro Software, Inc. * Copyright (c) 2012 Bjørn Mork <[email protected]> * * This driver is based on and reuse most of cdc_ncm, which is * Copyright (C) ST-Ericsson 2010-2012 */ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/ethtool.h> #include <linux/if_vlan.h> #include <linux/ip.h> #include <linux/mii.h> #include <linux/usb.h> #include <linux/usb/cdc.h> #include <linux/usb/usbnet.h> #include <linux/usb/cdc-wdm.h> #include <linux/usb/cdc_ncm.h> #include <net/ipv6.h> #include <net/addrconf.h> #include <net/ipv6_stubs.h> #include <net/ndisc.h> /* alternative VLAN for IP session 0 if not untagged */ #define MBIM_IPS0_VID … /* driver specific data - must match cdc_ncm usage */ struct cdc_mbim_state { … }; /* flags for the cdc_mbim_state.flags field */ enum cdc_mbim_flags { … }; /* using a counter to merge subdriver requests with our own into a combined state */ static int cdc_mbim_manage_power(struct usbnet *dev, int on) { … } static int cdc_mbim_wdm_manage_power(struct usb_interface *intf, int status) { … } static int cdc_mbim_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) { … } static int cdc_mbim_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) { … } static const struct net_device_ops cdc_mbim_netdev_ops = …; /* Change the control interface altsetting and update the .driver_info * pointer if the matching entry after changing class codes points to * a different struct */ static int cdc_mbim_set_ctrlalt(struct usbnet *dev, struct usb_interface *intf, u8 alt) { … } static int cdc_mbim_bind(struct usbnet *dev, struct usb_interface *intf) { … } static void cdc_mbim_unbind(struct usbnet *dev, struct usb_interface *intf) { … } /* verify that the ethernet protocol is IPv4 or IPv6 */ static bool is_ip_proto(__be16 proto) { … } static struct sk_buff *cdc_mbim_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) { … } /* Some devices are known to send Neighbor Solicitation messages and * require Neighbor Advertisement replies. The IPv6 core will not * respond since IFF_NOARP is set, so we must handle them ourselves. */ static void do_neigh_solicit(struct usbnet *dev, u8 *buf, u16 tci) { … } static bool is_neigh_solicit(u8 *buf, size_t len) { … } static struct sk_buff *cdc_mbim_process_dgram(struct usbnet *dev, u8 *buf, size_t len, u16 tci) { … } static int cdc_mbim_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) { … } static int cdc_mbim_suspend(struct usb_interface *intf, pm_message_t message) { … } static int cdc_mbim_resume(struct usb_interface *intf) { … } static const struct driver_info cdc_mbim_info = …; /* MBIM and NCM devices should not need a ZLP after NTBs with * dwNtbOutMaxSize length. Nevertheless, a number of devices from * different vendor IDs will fail unless we send ZLPs, forcing us * to make this the default. * * This default may cause a performance penalty for spec conforming * devices wanting to take advantage of optimizations possible without * ZLPs. A whitelist is added in an attempt to avoid this for devices * known to conform to the MBIM specification. * * All known devices supporting NCM compatibility mode are also * conforming to the NCM and MBIM specifications. For this reason, the * NCM subclass entry is also in the ZLP whitelist. */ static const struct driver_info cdc_mbim_info_zlp = …; /* The spefication explicitly allows NDPs to be placed anywhere in the * frame, but some devices fail unless the NDP is placed after the IP * packets. Using the CDC_NCM_FLAG_NDP_TO_END flags to force this * behaviour. * * Note: The current implementation of this feature restricts each NTB * to a single NDP, implying that multiplexed sessions cannot share an * NTB. This might affect performance for multiplexed sessions. */ static const struct driver_info cdc_mbim_info_ndp_to_end = …; /* Some modems (e.g. Telit LE922A6) do not work properly with altsetting * toggle done in cdc_ncm_bind_common. CDC_MBIM_FLAG_AVOID_ALTSETTING_TOGGLE * flag is used to avoid this procedure. */ static const struct driver_info cdc_mbim_info_avoid_altsetting_toggle = …; static const struct usb_device_id mbim_devs[] = …; MODULE_DEVICE_TABLE(usb, mbim_devs); static struct usb_driver cdc_mbim_driver = …; module_usb_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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