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TOMOYO Linux Cross Reference
Linux/include/linux/usb/usbnet.h

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  1 /*
  2  * USB Networking Link Interface
  3  *
  4  * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
  5  * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, write to the Free Software
 19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 20  */
 21 
 22 #ifndef __LINUX_USB_USBNET_H
 23 #define __LINUX_USB_USBNET_H
 24 
 25 /* interface from usbnet core to each USB networking link we handle */
 26 struct usbnet {
 27         /* housekeeping */
 28         struct usb_device       *udev;
 29         struct usb_interface    *intf;
 30         struct driver_info      *driver_info;
 31         const char              *driver_name;
 32         void                    *driver_priv;
 33         wait_queue_head_t       *wait;
 34         struct mutex            phy_mutex;
 35         unsigned char           suspend_count;
 36 
 37         /* i/o info: pipes etc */
 38         unsigned                in, out;
 39         struct usb_host_endpoint *status;
 40         unsigned                maxpacket;
 41         struct timer_list       delay;
 42 
 43         /* protocol/interface state */
 44         struct net_device       *net;
 45         int                     msg_enable;
 46         unsigned long           data[5];
 47         u32                     xid;
 48         u32                     hard_mtu;       /* count any extra framing */
 49         size_t                  rx_urb_size;    /* size for rx urbs */
 50         struct mii_if_info      mii;
 51 
 52         /* various kinds of pending driver work */
 53         struct sk_buff_head     rxq;
 54         struct sk_buff_head     txq;
 55         struct sk_buff_head     done;
 56         struct sk_buff_head     rxq_pause;
 57         struct urb              *interrupt;
 58         struct usb_anchor       deferred;
 59         struct tasklet_struct   bh;
 60 
 61         struct work_struct      kevent;
 62         unsigned long           flags;
 63 #               define EVENT_TX_HALT    0
 64 #               define EVENT_RX_HALT    1
 65 #               define EVENT_RX_MEMORY  2
 66 #               define EVENT_STS_SPLIT  3
 67 #               define EVENT_LINK_RESET 4
 68 #               define EVENT_RX_PAUSED  5
 69 #               define EVENT_DEV_WAKING 6
 70 #               define EVENT_DEV_ASLEEP 7
 71 #               define EVENT_DEV_OPEN   8
 72 };
 73 
 74 static inline struct usb_driver *driver_of(struct usb_interface *intf)
 75 {
 76         return to_usb_driver(intf->dev.driver);
 77 }
 78 
 79 /* interface from the device/framing level "minidriver" to core */
 80 struct driver_info {
 81         char            *description;
 82 
 83         int             flags;
 84 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */
 85 #define FLAG_FRAMING_NC 0x0001          /* guard against device dropouts */
 86 #define FLAG_FRAMING_GL 0x0002          /* genelink batches packets */
 87 #define FLAG_FRAMING_Z  0x0004          /* zaurus adds a trailer */
 88 #define FLAG_FRAMING_RN 0x0008          /* RNDIS batches, plus huge header */
 89 
 90 #define FLAG_NO_SETINT  0x0010          /* device can't set_interface() */
 91 #define FLAG_ETHER      0x0020          /* maybe use "eth%d" names */
 92 
 93 #define FLAG_FRAMING_AX 0x0040          /* AX88772/178 packets */
 94 #define FLAG_WLAN       0x0080          /* use "wlan%d" names */
 95 #define FLAG_AVOID_UNLINK_URBS 0x0100   /* don't unlink urbs at usbnet_stop() */
 96 #define FLAG_SEND_ZLP   0x0200          /* hw requires ZLPs are sent */
 97 #define FLAG_WWAN       0x0400          /* use "wwan%d" names */
 98 
 99 #define FLAG_LINK_INTR  0x0800          /* updates link (carrier) status */
100 
101 #define FLAG_POINTTOPOINT 0x1000        /* possibly use "usb%d" names */
102 
103 /*
104  * Indicates to usbnet, that USB driver accumulates multiple IP packets.
105  * Affects statistic (counters) and short packet handling.
106  */
107 #define FLAG_MULTI_PACKET       0x2000
108 #define FLAG_RX_ASSEMBLE        0x4000  /* rx packets may span >1 frames */
109 
110         /* init device ... can sleep, or cause probe() failure */
111         int     (*bind)(struct usbnet *, struct usb_interface *);
112 
113         /* cleanup device ... can sleep, but can't fail */
114         void    (*unbind)(struct usbnet *, struct usb_interface *);
115 
116         /* reset device ... can sleep */
117         int     (*reset)(struct usbnet *);
118 
119         /* stop device ... can sleep */
120         int     (*stop)(struct usbnet *);
121 
122         /* see if peer is connected ... can sleep */
123         int     (*check_connect)(struct usbnet *);
124 
125         /* (dis)activate runtime power management */
126         int     (*manage_power)(struct usbnet *, int);
127 
128         /* for status polling */
129         void    (*status)(struct usbnet *, struct urb *);
130 
131         /* link reset handling, called from defer_kevent */
132         int     (*link_reset)(struct usbnet *);
133 
134         /* fixup rx packet (strip framing) */
135         int     (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
136 
137         /* fixup tx packet (add framing) */
138         struct sk_buff  *(*tx_fixup)(struct usbnet *dev,
139                                 struct sk_buff *skb, gfp_t flags);
140 
141         /* early initialization code, can sleep. This is for minidrivers
142          * having 'subminidrivers' that need to do extra initialization
143          * right after minidriver have initialized hardware. */
144         int     (*early_init)(struct usbnet *dev);
145 
146         /* called by minidriver when receiving indication */
147         void    (*indication)(struct usbnet *dev, void *ind, int indlen);
148 
149         /* for new devices, use the descriptor-reading code instead */
150         int             in;             /* rx endpoint */
151         int             out;            /* tx endpoint */
152 
153         unsigned long   data;           /* Misc driver specific data */
154 };
155 
156 /* Minidrivers are just drivers using the "usbnet" core as a powerful
157  * network-specific subroutine library ... that happens to do pretty
158  * much everything except custom framing and chip-specific stuff.
159  */
160 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *);
161 extern int usbnet_suspend(struct usb_interface *, pm_message_t);
162 extern int usbnet_resume(struct usb_interface *);
163 extern void usbnet_disconnect(struct usb_interface *);
164 
165 
166 /* Drivers that reuse some of the standard USB CDC infrastructure
167  * (notably, using multiple interfaces according to the CDC
168  * union descriptor) get some helper code.
169  */
170 struct cdc_state {
171         struct usb_cdc_header_desc      *header;
172         struct usb_cdc_union_desc       *u;
173         struct usb_cdc_ether_desc       *ether;
174         struct usb_interface            *control;
175         struct usb_interface            *data;
176 };
177 
178 extern int usbnet_generic_cdc_bind(struct usbnet *, struct usb_interface *);
179 extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *);
180 extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *);
181 extern void usbnet_cdc_status(struct usbnet *, struct urb *);
182 
183 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
184 #define DEFAULT_FILTER  (USB_CDC_PACKET_TYPE_BROADCAST \
185                         |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
186                         |USB_CDC_PACKET_TYPE_PROMISCUOUS \
187                         |USB_CDC_PACKET_TYPE_DIRECTED)
188 
189 
190 /* we record the state for each of our queued skbs */
191 enum skb_state {
192         illegal = 0,
193         tx_start, tx_done,
194         rx_start, rx_done, rx_cleanup,
195         unlink_start
196 };
197 
198 struct skb_data {       /* skb->cb is one of these */
199         struct urb              *urb;
200         struct usbnet           *dev;
201         enum skb_state          state;
202         size_t                  length;
203 };
204 
205 extern int usbnet_open(struct net_device *net);
206 extern int usbnet_stop(struct net_device *net);
207 extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,
208                                      struct net_device *net);
209 extern void usbnet_tx_timeout(struct net_device *net);
210 extern int usbnet_change_mtu(struct net_device *net, int new_mtu);
211 
212 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
213 extern int usbnet_get_ethernet_addr(struct usbnet *, int);
214 extern void usbnet_defer_kevent(struct usbnet *, int);
215 extern void usbnet_skb_return(struct usbnet *, struct sk_buff *);
216 extern void usbnet_unlink_rx_urbs(struct usbnet *);
217 
218 extern void usbnet_pause_rx(struct usbnet *);
219 extern void usbnet_resume_rx(struct usbnet *);
220 extern void usbnet_purge_paused_rxq(struct usbnet *);
221 
222 extern int usbnet_get_settings(struct net_device *net,
223                                struct ethtool_cmd *cmd);
224 extern int usbnet_set_settings(struct net_device *net,
225                                struct ethtool_cmd *cmd);
226 extern u32 usbnet_get_link(struct net_device *net);
227 extern u32 usbnet_get_msglevel(struct net_device *);
228 extern void usbnet_set_msglevel(struct net_device *, u32);
229 extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
230 extern int usbnet_nway_reset(struct net_device *net);
231 
232 #endif /* __LINUX_USB_USBNET_H */
233 

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