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289 lines
10 KiB
289 lines
10 KiB
// 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 <[email protected]> |
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* Copyright (C) 2003-2005 David Hollis <[email protected]> |
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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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const 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 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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u32 rx_speed; /* in bps - NOT Mbps */ |
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u32 tx_speed; /* in bps - NOT Mbps */ |
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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 void usbnet_cdc_update_filter(struct usbnet *dev); |
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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, unsigned int txqueue); |
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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_set_rx_mode(struct net_device *net); |
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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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#endif /* __LINUX_USB_USBNET_H */
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