1 /* 2 * USB Networking Link Interface 3 * 4 * Copyright (C) 2000-2005 by David Brownell <[email protected]> 5 * Copyright (C) 2003-2005 David Hollis <[email protected]> 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 unsigned char pkt_cnt, pkt_err; 37 unsigned short rx_qlen, tx_qlen; 38 unsigned can_dma_sg:1; 39 40 /* i/o info: pipes etc */ 41 unsigned in, out; 42 struct usb_host_endpoint *status; 43 unsigned maxpacket; 44 struct timer_list delay; 45 const char *padding_pkt; 46 47 /* protocol/interface state */ 48 struct net_device *net; 49 int msg_enable; 50 unsigned long data[5]; 51 u32 xid; 52 u32 hard_mtu; /* count any extra framing */ 53 size_t rx_urb_size; /* size for rx urbs */ 54 struct mii_if_info mii; 55 56 /* various kinds of pending driver work */ 57 struct sk_buff_head rxq; 58 struct sk_buff_head txq; 59 struct sk_buff_head done; 60 struct sk_buff_head rxq_pause; 61 struct urb *interrupt; 62 unsigned interrupt_count; 63 struct mutex interrupt_mutex; 64 struct usb_anchor deferred; 65 struct tasklet_struct bh; 66 67 struct work_struct kevent; 68 unsigned long flags; 69 # define EVENT_TX_HALT 0 70 # define EVENT_RX_HALT 1 71 # define EVENT_RX_MEMORY 2 72 # define EVENT_STS_SPLIT 3 73 # define EVENT_LINK_RESET 4 74 # define EVENT_RX_PAUSED 5 75 # define EVENT_DEV_ASLEEP 6 76 # define EVENT_DEV_OPEN 7 77 # define EVENT_DEVICE_REPORT_IDLE 8 78 # define EVENT_NO_RUNTIME_PM 9 79 # define EVENT_RX_KILL 10 80 # define EVENT_LINK_CHANGE 11 81 # define EVENT_SET_RX_MODE 12 82 }; 83 84 static inline struct usb_driver *driver_of(struct usb_interface *intf) 85 { 86 return to_usb_driver(intf->dev.driver); 87 } 88 89 /* interface from the device/framing level "minidriver" to core */ 90 struct driver_info { 91 char *description; 92 93 int flags; 94 /* framing is CDC Ethernet, not writing ZLPs (hw issues), or optionally: */ 95 #define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */ 96 #define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */ 97 #define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */ 98 #define FLAG_FRAMING_RN 0x0008 /* RNDIS batches, plus huge header */ 99 100 #define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */ 101 #define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */ 102 103 #define FLAG_FRAMING_AX 0x0040 /* AX88772/178 packets */ 104 #define FLAG_WLAN 0x0080 /* use "wlan%d" names */ 105 #define FLAG_AVOID_UNLINK_URBS 0x0100 /* don't unlink urbs at usbnet_stop() */ 106 #define FLAG_SEND_ZLP 0x0200 /* hw requires ZLPs are sent */ 107 #define FLAG_WWAN 0x0400 /* use "wwan%d" names */ 108 109 #define FLAG_LINK_INTR 0x0800 /* updates link (carrier) status */ 110 111 #define FLAG_POINTTOPOINT 0x1000 /* possibly use "usb%d" names */ 112 113 /* 114 * Indicates to usbnet, that USB driver accumulates multiple IP packets. 115 * Affects statistic (counters) and short packet handling. 116 */ 117 #define FLAG_MULTI_PACKET 0x2000 118 #define FLAG_RX_ASSEMBLE 0x4000 /* rx packets may span >1 frames */ 119 #define FLAG_NOARP 0x8000 /* device can't do ARP */ 120 121 /* init device ... can sleep, or cause probe() failure */ 122 int (*bind)(struct usbnet *, struct usb_interface *); 123 124 /* cleanup device ... can sleep, but can't fail */ 125 void (*unbind)(struct usbnet *, struct usb_interface *); 126 127 /* reset device ... can sleep */ 128 int (*reset)(struct usbnet *); 129 130 /* stop device ... can sleep */ 131 int (*stop)(struct usbnet *); 132 133 /* see if peer is connected ... can sleep */ 134 int (*check_connect)(struct usbnet *); 135 136 /* (dis)activate runtime power management */ 137 int (*manage_power)(struct usbnet *, int); 138 139 /* for status polling */ 140 void (*status)(struct usbnet *, struct urb *); 141 142 /* link reset handling, called from defer_kevent */ 143 int (*link_reset)(struct usbnet *); 144 145 /* fixup rx packet (strip framing) */ 146 int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb); 147 148 /* fixup tx packet (add framing) */ 149 struct sk_buff *(*tx_fixup)(struct usbnet *dev, 150 struct sk_buff *skb, gfp_t flags); 151 152 /* recover from timeout */ 153 void (*recover)(struct usbnet *dev); 154 155 /* early initialization code, can sleep. This is for minidrivers 156 * having 'subminidrivers' that need to do extra initialization 157 * right after minidriver have initialized hardware. */ 158 int (*early_init)(struct usbnet *dev); 159 160 /* called by minidriver when receiving indication */ 161 void (*indication)(struct usbnet *dev, void *ind, int indlen); 162 163 /* rx mode change (device changes address list filtering) */ 164 void (*set_rx_mode)(struct usbnet *dev); 165 166 /* for new devices, use the descriptor-reading code instead */ 167 int in; /* rx endpoint */ 168 int out; /* tx endpoint */ 169 170 unsigned long data; /* Misc driver specific data */ 171 }; 172 173 /* Minidrivers are just drivers using the "usbnet" core as a powerful 174 * network-specific subroutine library ... that happens to do pretty 175 * much everything except custom framing and chip-specific stuff. 176 */ 177 extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); 178 extern int usbnet_suspend(struct usb_interface *, pm_message_t); 179 extern int usbnet_resume(struct usb_interface *); 180 extern void usbnet_disconnect(struct usb_interface *); 181 extern void usbnet_device_suggests_idle(struct usbnet *dev); 182 183 extern int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, 184 u16 value, u16 index, void *data, u16 size); 185 extern int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, 186 u16 value, u16 index, const void *data, u16 size); 187 extern int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, 188 u16 value, u16 index, void *data, u16 size); 189 extern int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype, 190 u16 value, u16 index, const void *data, u16 size); 191 extern int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype, 192 u16 value, u16 index, const void *data, u16 size); 193 194 /* Drivers that reuse some of the standard USB CDC infrastructure 195 * (notably, using multiple interfaces according to the CDC 196 * union descriptor) get some helper code. 197 */ 198 struct cdc_state { 199 struct usb_cdc_header_desc *header; 200 struct usb_cdc_union_desc *u; 201 struct usb_cdc_ether_desc *ether; 202 struct usb_interface *control; 203 struct usb_interface *data; 204 }; 205 206 extern int usbnet_generic_cdc_bind(struct usbnet *, struct usb_interface *); 207 extern int usbnet_cdc_bind(struct usbnet *, struct usb_interface *); 208 extern void usbnet_cdc_unbind(struct usbnet *, struct usb_interface *); 209 extern void usbnet_cdc_status(struct usbnet *, struct urb *); 210 211 /* CDC and RNDIS support the same host-chosen packet filters for IN transfers */ 212 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 213 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 214 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 215 |USB_CDC_PACKET_TYPE_DIRECTED) 216 217 218 /* we record the state for each of our queued skbs */ 219 enum skb_state { 220 illegal = 0, 221 tx_start, tx_done, 222 rx_start, rx_done, rx_cleanup, 223 unlink_start 224 }; 225 226 struct skb_data { /* skb->cb is one of these */ 227 struct urb *urb; 228 struct usbnet *dev; 229 enum skb_state state; 230 long length; 231 unsigned long packets; 232 }; 233 234 /* Drivers that set FLAG_MULTI_PACKET must call this in their 235 * tx_fixup method before returning an skb. 236 */ 237 static inline void 238 usbnet_set_skb_tx_stats(struct sk_buff *skb, 239 unsigned long packets, long bytes_delta) 240 { 241 struct skb_data *entry = (struct skb_data *) skb->cb; 242 243 entry->packets = packets; 244 entry->length = bytes_delta; 245 } 246 247 extern int usbnet_open(struct net_device *net); 248 extern int usbnet_stop(struct net_device *net); 249 extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb, 250 struct net_device *net); 251 extern void usbnet_tx_timeout(struct net_device *net); 252 extern int usbnet_change_mtu(struct net_device *net, int new_mtu); 253 254 extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *); 255 extern int usbnet_get_ethernet_addr(struct usbnet *, int); 256 extern void usbnet_defer_kevent(struct usbnet *, int); 257 extern void usbnet_skb_return(struct usbnet *, struct sk_buff *); 258 extern void usbnet_unlink_rx_urbs(struct usbnet *); 259 260 extern void usbnet_pause_rx(struct usbnet *); 261 extern void usbnet_resume_rx(struct usbnet *); 262 extern void usbnet_purge_paused_rxq(struct usbnet *); 263 264 extern int usbnet_get_settings(struct net_device *net, 265 struct ethtool_cmd *cmd); 266 extern int usbnet_set_settings(struct net_device *net, 267 struct ethtool_cmd *cmd); 268 extern u32 usbnet_get_link(struct net_device *net); 269 extern u32 usbnet_get_msglevel(struct net_device *); 270 extern void usbnet_set_msglevel(struct net_device *, u32); 271 extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); 272 extern int usbnet_nway_reset(struct net_device *net); 273 274 extern int usbnet_manage_power(struct usbnet *, int); 275 extern void usbnet_link_change(struct usbnet *, bool, bool); 276 277 extern int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags); 278 extern void usbnet_status_stop(struct usbnet *dev); 279 280 extern void usbnet_update_max_qlen(struct usbnet *dev); 281 282 #endif /* __LINUX_USB_USBNET_H */ 283