/* * USB Networking Link Interface * * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net> * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef __USBNET_H #define __USBNET_H /* interface from usbnet core to each USB networking link we handle */ struct usbnet { /* housekeeping */ struct usb_device *udev; struct driver_info *driver_info; wait_queue_head_t *wait; /* i/o info: pipes etc */ unsigned in, out; struct usb_host_endpoint *status; unsigned maxpacket; struct timer_list delay; /* protocol/interface state */ struct net_device *net; struct net_device_stats stats; int msg_enable; unsigned long data [5]; u32 xid; u32 hard_mtu; /* count any extra framing */ size_t rx_urb_size; /* size for rx urbs */ struct mii_if_info mii; /* various kinds of pending driver work */ struct sk_buff_head rxq; struct sk_buff_head txq; struct sk_buff_head done; struct urb *interrupt; struct tasklet_struct bh; struct work_struct kevent; unsigned long flags; # define EVENT_TX_HALT 0 # define EVENT_RX_HALT 1 # define EVENT_RX_MEMORY 2 # define EVENT_STS_SPLIT 3 # define EVENT_LINK_RESET 4 }; static inline struct usb_driver *driver_of(struct usb_interface *intf) { return to_usb_driver(intf->dev.driver); } /* interface from the device/framing level "minidriver" to core */ struct driver_info { char *description; int flags; /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */ #define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */ #define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */ #define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */ #define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */ #define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */ #define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */ #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */ /* init device ... can sleep, or cause probe() failure */ int (*bind)(struct usbnet *, struct usb_interface *); /* cleanup device ... can sleep, but can't fail */ void (*unbind)(struct usbnet *, struct usb_interface *); /* reset device ... can sleep */ int (*reset)(struct usbnet *); /* see if peer is connected ... can sleep */ int (*check_connect)(struct usbnet *); /* for status polling */ void (*status)(struct usbnet *, struct urb *); /* link reset handling, called from defer_kevent */ int (*link_reset)(struct usbnet *); /* fixup rx packet (strip framing) */ int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb); /* fixup tx packet (add framing) */ struct sk_buff *(*tx_fixup)(struct usbnet *dev, struct sk_buff *skb, gfp_t flags); /* for new devices, use the descriptor-reading code instead */ int in; /* rx endpoint */ int out; /* tx endpoint */ unsigned long data; /* Misc driver specific data */ }; /* Minidrivers are just drivers using the "usbnet" core as a powerful * network-specific subroutine library ... that happens to do pretty * much everything except custom framing and chip-specific stuff. */ extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); extern int usbnet_suspend (struct usb_interface *, pm_message_t ); extern int usbnet_resume (struct usb_interface *); extern void usbnet_disconnect(struct usb_interface *); /* Drivers that reuse some of the standard USB CDC infrastructure * (notably, using multiple interfaces according to the the CDC * union descriptor) get some helper code. */ struct cdc_state { struct usb_cdc_header_desc *header; struct usb_cdc_union_desc *u; struct usb_cdc_ether_desc *ether; struct usb_interface *control; struct usb_interface *data; }; extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *); extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *); /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */ #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ |USB_CDC_PACKET_TYPE_PROMISCUOUS \ |USB_CDC_PACKET_TYPE_DIRECTED) /* we record the state for each of our queued skbs */ enum skb_state { illegal = 0, tx_start, tx_done, rx_start, rx_done, rx_cleanup }; struct skb_data { /* skb->cb is one of these */ struct urb *urb; struct usbnet *dev; enum skb_state state; size_t length; }; extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *); extern void usbnet_defer_kevent (struct usbnet *, int); extern void usbnet_skb_return (struct usbnet *, struct sk_buff *); extern u32 usbnet_get_msglevel (struct net_device *); extern void usbnet_set_msglevel (struct net_device *, u32); extern void usbnet_get_drvinfo (struct net_device *, struct ethtool_drvinfo *); /* messaging support includes the interface name, so it must not be * used before it has one ... notably, in minidriver bind() calls. */ #ifdef DEBUG #define devdbg(usbnet, fmt, arg...) \ printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net->name , ## arg) #else #define devdbg(usbnet, fmt, arg...) do {} while(0) #endif #define deverr(usbnet, fmt, arg...) \ printk(KERN_ERR "%s: " fmt "\n" , (usbnet)->net->name , ## arg) #define devwarn(usbnet, fmt, arg...) \ printk(KERN_WARNING "%s: " fmt "\n" , (usbnet)->net->name , ## arg) #define devinfo(usbnet, fmt, arg...) \ printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net->name , ## arg); \ #endif /* __USBNET_H */