290 lines
9.9 KiB
C
290 lines
9.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* USB Networking Link Interface
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*
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* Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
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* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __LINUX_USB_USBNET_H
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#define __LINUX_USB_USBNET_H
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/* interface from usbnet core to each USB networking link we handle */
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struct usbnet {
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/* housekeeping */
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struct usb_device *udev;
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struct usb_interface *intf;
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struct driver_info *driver_info;
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const char *driver_name;
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void *driver_priv;
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wait_queue_head_t wait;
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struct mutex phy_mutex;
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unsigned char suspend_count;
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unsigned char pkt_cnt, pkt_err;
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unsigned short rx_qlen, tx_qlen;
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unsigned can_dma_sg:1;
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/* i/o info: pipes etc */
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unsigned in, out;
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struct usb_host_endpoint *status;
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unsigned maxpacket;
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struct timer_list delay;
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const char *padding_pkt;
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/* protocol/interface state */
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struct net_device *net;
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int msg_enable;
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unsigned long data[5];
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u32 xid;
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u32 hard_mtu; /* count any extra framing */
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size_t rx_urb_size; /* size for rx urbs */
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struct mii_if_info mii;
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/* various kinds of pending driver work */
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struct sk_buff_head rxq;
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struct sk_buff_head txq;
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struct sk_buff_head done;
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struct sk_buff_head rxq_pause;
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struct urb *interrupt;
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unsigned interrupt_count;
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struct mutex interrupt_mutex;
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struct usb_anchor deferred;
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struct tasklet_struct bh;
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struct pcpu_sw_netstats __percpu *stats64;
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struct work_struct kevent;
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unsigned long flags;
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# define EVENT_TX_HALT 0
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# define EVENT_RX_HALT 1
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# define EVENT_RX_MEMORY 2
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# define EVENT_STS_SPLIT 3
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# define EVENT_LINK_RESET 4
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# define EVENT_RX_PAUSED 5
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# define EVENT_DEV_ASLEEP 6
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# define EVENT_DEV_OPEN 7
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# define EVENT_DEVICE_REPORT_IDLE 8
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# define EVENT_NO_RUNTIME_PM 9
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# define EVENT_RX_KILL 10
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# define EVENT_LINK_CHANGE 11
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# define EVENT_SET_RX_MODE 12
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# define EVENT_NO_IP_ALIGN 13
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};
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static inline struct usb_driver *driver_of(struct usb_interface *intf)
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{
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return to_usb_driver(intf->dev.driver);
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}
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/* interface from the device/framing level "minidriver" to core */
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struct driver_info {
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char *description;
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int flags;
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/* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
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#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
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#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
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#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
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#define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */
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#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
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#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
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#define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */
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#define FLAG_WLAN 0x0080 /* use "wlan%d" names */
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#define FLAG_AVOID_UNLINK_URBS 0x0100 /* don't unlink urbs at usbnet_stop() */
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#define FLAG_SEND_ZLP 0x0200 /* hw requires ZLPs are sent */
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#define FLAG_WWAN 0x0400 /* use "wwan%d" names */
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#define FLAG_LINK_INTR 0x0800 /* updates link (carrier) status */
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#define FLAG_POINTTOPOINT 0x1000 /* possibly use "usb%d" names */
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/*
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* Indicates to usbnet, that USB driver accumulates multiple IP packets.
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* Affects statistic (counters) and short packet handling.
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*/
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#define FLAG_MULTI_PACKET 0x2000
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#define FLAG_RX_ASSEMBLE 0x4000 /* rx packets may span >1 frames */
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#define FLAG_NOARP 0x8000 /* device can't do ARP */
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/* init device ... can sleep, or cause probe() failure */
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int (*bind)(struct usbnet *, struct usb_interface *);
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/* cleanup device ... can sleep, but can't fail */
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void (*unbind)(struct usbnet *, struct usb_interface *);
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/* reset device ... can sleep */
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int (*reset)(struct usbnet *);
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/* stop device ... can sleep */
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int (*stop)(struct usbnet *);
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/* see if peer is connected ... can sleep */
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int (*check_connect)(struct usbnet *);
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/* (dis)activate runtime power management */
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int (*manage_power)(struct usbnet *, int);
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/* for status polling */
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void (*status)(struct usbnet *, struct urb *);
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/* link reset handling, called from defer_kevent */
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int (*link_reset)(struct usbnet *);
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/* fixup rx packet (strip framing) */
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int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
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/* fixup tx packet (add framing) */
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struct sk_buff *(*tx_fixup)(struct usbnet *dev,
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struct sk_buff *skb, gfp_t flags);
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/* recover from timeout */
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void (*recover)(struct usbnet *dev);
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/* early initialization code, can sleep. This is for minidrivers
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* having 'subminidrivers' that need to do extra initialization
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* right after minidriver have initialized hardware. */
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int (*early_init)(struct usbnet *dev);
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/* called by minidriver when receiving indication */
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void (*indication)(struct usbnet *dev, void *ind, int indlen);
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/* rx mode change (device changes address list filtering) */
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void (*set_rx_mode)(struct usbnet *dev);
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/* for new devices, use the descriptor-reading code instead */
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int in; /* rx endpoint */
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int out; /* tx endpoint */
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unsigned long data; /* Misc driver specific data */
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};
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/* Minidrivers are just drivers using the "usbnet" core as a powerful
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* network-specific subroutine library ... that happens to do pretty
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* much everything except custom framing and chip-specific stuff.
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*/
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extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
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extern int usbnet_suspend(struct usb_interface *, pm_message_t);
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extern int usbnet_resume(struct usb_interface *);
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extern void usbnet_disconnect(struct usb_interface *);
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extern void usbnet_device_suggests_idle(struct usbnet *dev);
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extern int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
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u16 value, u16 index, void *data, u16 size);
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extern int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
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u16 value, u16 index, const void *data, u16 size);
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extern int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
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u16 value, u16 index, void *data, u16 size);
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extern int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
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u16 value, u16 index, const void *data, u16 size);
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extern int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype,
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u16 value, u16 index, const void *data, u16 size);
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/* Drivers that reuse some of the standard USB CDC infrastructure
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* (notably, using multiple interfaces according to the CDC
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* union descriptor) get some helper code.
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*/
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struct cdc_state {
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struct usb_cdc_header_desc *header;
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struct usb_cdc_union_desc *u;
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struct usb_cdc_ether_desc *ether;
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struct usb_interface *control;
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struct usb_interface *data;
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};
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extern int usbnet_generic_cdc_bind(struct usbnet *, struct usb_interface *);
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extern int usbnet_ether_cdc_bind(struct usbnet *dev, struct usb_interface *intf);
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extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *);
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extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *);
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extern void usbnet_cdc_status(struct usbnet *, struct urb *);
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/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
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#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
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|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
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|USB_CDC_PACKET_TYPE_PROMISCUOUS \
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|USB_CDC_PACKET_TYPE_DIRECTED)
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/* we record the state for each of our queued skbs */
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enum skb_state {
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illegal = 0,
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tx_start, tx_done,
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rx_start, rx_done, rx_cleanup,
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unlink_start
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};
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struct skb_data { /* skb->cb is one of these */
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struct urb *urb;
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struct usbnet *dev;
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enum skb_state state;
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long length;
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unsigned long packets;
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};
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/* Drivers that set FLAG_MULTI_PACKET must call this in their
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* tx_fixup method before returning an skb.
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*/
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static inline void
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usbnet_set_skb_tx_stats(struct sk_buff *skb,
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unsigned long packets, long bytes_delta)
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{
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struct skb_data *entry = (struct skb_data *) skb->cb;
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entry->packets = packets;
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entry->length = bytes_delta;
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}
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extern int usbnet_open(struct net_device *net);
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extern int usbnet_stop(struct net_device *net);
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extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,
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struct net_device *net);
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extern void usbnet_tx_timeout(struct net_device *net);
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extern int usbnet_change_mtu(struct net_device *net, int new_mtu);
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extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
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extern int usbnet_get_ethernet_addr(struct usbnet *, int);
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extern void usbnet_defer_kevent(struct usbnet *, int);
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extern void usbnet_skb_return(struct usbnet *, struct sk_buff *);
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extern void usbnet_unlink_rx_urbs(struct usbnet *);
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extern void usbnet_pause_rx(struct usbnet *);
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extern void usbnet_resume_rx(struct usbnet *);
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extern void usbnet_purge_paused_rxq(struct usbnet *);
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extern int usbnet_get_link_ksettings(struct net_device *net,
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struct ethtool_link_ksettings *cmd);
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extern int usbnet_set_link_ksettings(struct net_device *net,
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const struct ethtool_link_ksettings *cmd);
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extern u32 usbnet_get_link(struct net_device *net);
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extern u32 usbnet_get_msglevel(struct net_device *);
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extern void usbnet_set_msglevel(struct net_device *, u32);
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extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
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extern int usbnet_nway_reset(struct net_device *net);
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extern int usbnet_manage_power(struct usbnet *, int);
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extern void usbnet_link_change(struct usbnet *, bool, bool);
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extern int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags);
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extern void usbnet_status_stop(struct usbnet *dev);
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extern void usbnet_update_max_qlen(struct usbnet *dev);
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extern void usbnet_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *stats);
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#endif /* __LINUX_USB_USBNET_H */
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