Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Definitions for the Interfaces handler. |
| 7 | * |
| 8 | * Version: @(#)dev.h 1.0.10 08/12/93 |
| 9 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> |
| 13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> |
| 14 | * Alan Cox, <Alan.Cox@linux.org> |
| 15 | * Bjorn Ekwall. <bj0rn@blox.se> |
| 16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License |
| 20 | * as published by the Free Software Foundation; either version |
| 21 | * 2 of the License, or (at your option) any later version. |
| 22 | * |
| 23 | * Moved to /usr/include/linux for NET3 |
| 24 | */ |
| 25 | #ifndef _LINUX_NETDEVICE_H |
| 26 | #define _LINUX_NETDEVICE_H |
| 27 | |
| 28 | #include <linux/if.h> |
| 29 | #include <linux/if_ether.h> |
| 30 | #include <linux/if_packet.h> |
| 31 | |
| 32 | #ifdef __KERNEL__ |
| 33 | #include <asm/atomic.h> |
| 34 | #include <asm/cache.h> |
| 35 | #include <asm/byteorder.h> |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/device.h> |
| 38 | #include <linux/percpu.h> |
Chris Leech | db21733 | 2006-06-17 21:24:58 -0700 | [diff] [blame] | 39 | #include <linux/dmaengine.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | struct divert_blk; |
| 42 | struct vlan_group; |
| 43 | struct ethtool_ops; |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 44 | struct netpoll_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | /* source back-compat hooks */ |
| 46 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
| 47 | ( (netdev)->ethtool_ops = (ops) ) |
| 48 | |
| 49 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev |
| 50 | functions are available. */ |
| 51 | #define HAVE_FREE_NETDEV /* free_netdev() */ |
| 52 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ |
| 53 | |
| 54 | #define NET_XMIT_SUCCESS 0 |
| 55 | #define NET_XMIT_DROP 1 /* skb dropped */ |
| 56 | #define NET_XMIT_CN 2 /* congestion notification */ |
| 57 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ |
| 58 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; |
| 59 | (TC use only - dev_queue_xmit |
| 60 | returns this as NET_XMIT_SUCCESS) */ |
| 61 | |
| 62 | /* Backlog congestion levels */ |
| 63 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
| 64 | #define NET_RX_DROP 1 /* packet dropped */ |
| 65 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ |
| 66 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ |
| 67 | #define NET_RX_CN_HIGH 4 /* The storm is here */ |
| 68 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ |
| 69 | |
| 70 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| 71 | |
| 72 | #endif |
| 73 | |
| 74 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ |
| 75 | |
| 76 | /* Driver transmit return codes */ |
| 77 | #define NETDEV_TX_OK 0 /* driver took care of packet */ |
| 78 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ |
| 79 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ |
| 80 | |
| 81 | /* |
| 82 | * Compute the worst case header length according to the protocols |
| 83 | * used. |
| 84 | */ |
| 85 | |
| 86 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) |
| 87 | #define LL_MAX_HEADER 32 |
| 88 | #else |
| 89 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
| 90 | #define LL_MAX_HEADER 96 |
| 91 | #else |
| 92 | #define LL_MAX_HEADER 48 |
| 93 | #endif |
| 94 | #endif |
| 95 | |
| 96 | #if !defined(CONFIG_NET_IPIP) && \ |
| 97 | !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) |
| 98 | #define MAX_HEADER LL_MAX_HEADER |
| 99 | #else |
| 100 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
| 101 | #endif |
| 102 | |
| 103 | /* |
| 104 | * Network device statistics. Akin to the 2.0 ether stats but |
| 105 | * with byte counters. |
| 106 | */ |
| 107 | |
| 108 | struct net_device_stats |
| 109 | { |
| 110 | unsigned long rx_packets; /* total packets received */ |
| 111 | unsigned long tx_packets; /* total packets transmitted */ |
| 112 | unsigned long rx_bytes; /* total bytes received */ |
| 113 | unsigned long tx_bytes; /* total bytes transmitted */ |
| 114 | unsigned long rx_errors; /* bad packets received */ |
| 115 | unsigned long tx_errors; /* packet transmit problems */ |
| 116 | unsigned long rx_dropped; /* no space in linux buffers */ |
| 117 | unsigned long tx_dropped; /* no space available in linux */ |
| 118 | unsigned long multicast; /* multicast packets received */ |
| 119 | unsigned long collisions; |
| 120 | |
| 121 | /* detailed rx_errors: */ |
| 122 | unsigned long rx_length_errors; |
| 123 | unsigned long rx_over_errors; /* receiver ring buff overflow */ |
| 124 | unsigned long rx_crc_errors; /* recved pkt with crc error */ |
| 125 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ |
| 126 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ |
| 127 | unsigned long rx_missed_errors; /* receiver missed packet */ |
| 128 | |
| 129 | /* detailed tx_errors */ |
| 130 | unsigned long tx_aborted_errors; |
| 131 | unsigned long tx_carrier_errors; |
| 132 | unsigned long tx_fifo_errors; |
| 133 | unsigned long tx_heartbeat_errors; |
| 134 | unsigned long tx_window_errors; |
| 135 | |
| 136 | /* for cslip etc */ |
| 137 | unsigned long rx_compressed; |
| 138 | unsigned long tx_compressed; |
| 139 | }; |
| 140 | |
| 141 | |
| 142 | /* Media selection options. */ |
| 143 | enum { |
| 144 | IF_PORT_UNKNOWN = 0, |
| 145 | IF_PORT_10BASE2, |
| 146 | IF_PORT_10BASET, |
| 147 | IF_PORT_AUI, |
| 148 | IF_PORT_100BASET, |
| 149 | IF_PORT_100BASETX, |
| 150 | IF_PORT_100BASEFX |
| 151 | }; |
| 152 | |
| 153 | #ifdef __KERNEL__ |
| 154 | |
| 155 | #include <linux/cache.h> |
| 156 | #include <linux/skbuff.h> |
| 157 | |
| 158 | struct neighbour; |
| 159 | struct neigh_parms; |
| 160 | struct sk_buff; |
| 161 | |
| 162 | struct netif_rx_stats |
| 163 | { |
| 164 | unsigned total; |
| 165 | unsigned dropped; |
| 166 | unsigned time_squeeze; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | unsigned cpu_collision; |
| 168 | }; |
| 169 | |
| 170 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); |
| 171 | |
| 172 | |
| 173 | /* |
| 174 | * We tag multicasts with these structures. |
| 175 | */ |
| 176 | |
| 177 | struct dev_mc_list |
| 178 | { |
| 179 | struct dev_mc_list *next; |
| 180 | __u8 dmi_addr[MAX_ADDR_LEN]; |
| 181 | unsigned char dmi_addrlen; |
| 182 | int dmi_users; |
| 183 | int dmi_gusers; |
| 184 | }; |
| 185 | |
| 186 | struct hh_cache |
| 187 | { |
| 188 | struct hh_cache *hh_next; /* Next entry */ |
| 189 | atomic_t hh_refcnt; /* number of users */ |
| 190 | unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP |
| 191 | * NOTE: For VLANs, this will be the |
| 192 | * encapuslated type. --BLG |
| 193 | */ |
| 194 | int hh_len; /* length of header */ |
| 195 | int (*hh_output)(struct sk_buff *skb); |
| 196 | rwlock_t hh_lock; |
| 197 | |
| 198 | /* cached hardware header; allow for machine alignment needs. */ |
| 199 | #define HH_DATA_MOD 16 |
| 200 | #define HH_DATA_OFF(__len) \ |
Jiri Benc | 5ba0eac | 2005-06-02 16:48:05 -0700 | [diff] [blame] | 201 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | #define HH_DATA_ALIGN(__len) \ |
| 203 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| 204 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| 205 | }; |
| 206 | |
| 207 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
| 208 | * Alternative is: |
| 209 | * dev->hard_header_len ? (dev->hard_header_len + |
| 210 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| 211 | * |
| 212 | * We could use other alignment values, but we must maintain the |
| 213 | * relationship HH alignment <= LL alignment. |
| 214 | */ |
| 215 | #define LL_RESERVED_SPACE(dev) \ |
| 216 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| 217 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
| 218 | ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| 219 | |
| 220 | /* These flag bits are private to the generic network queueing |
| 221 | * layer, they may not be explicitly referenced by any other |
| 222 | * code. |
| 223 | */ |
| 224 | |
| 225 | enum netdev_state_t |
| 226 | { |
| 227 | __LINK_STATE_XOFF=0, |
| 228 | __LINK_STATE_START, |
| 229 | __LINK_STATE_PRESENT, |
| 230 | __LINK_STATE_SCHED, |
| 231 | __LINK_STATE_NOCARRIER, |
| 232 | __LINK_STATE_RX_SCHED, |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 233 | __LINK_STATE_LINKWATCH_PENDING, |
| 234 | __LINK_STATE_DORMANT, |
Herbert Xu | 48d8332 | 2006-06-19 23:57:59 -0700 | [diff] [blame] | 235 | __LINK_STATE_QDISC_RUNNING, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | }; |
| 237 | |
| 238 | |
| 239 | /* |
| 240 | * This structure holds at boot time configured netdevice settings. They |
| 241 | * are then used in the device probing. |
| 242 | */ |
| 243 | struct netdev_boot_setup { |
| 244 | char name[IFNAMSIZ]; |
| 245 | struct ifmap map; |
| 246 | }; |
| 247 | #define NETDEV_BOOT_SETUP_MAX 8 |
| 248 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 249 | extern int __init netdev_boot_setup(char *str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | /* |
| 252 | * The DEVICE structure. |
| 253 | * Actually, this whole structure is a big mistake. It mixes I/O |
| 254 | * data with strictly "high-level" data, and it has to know about |
| 255 | * almost every data structure used in the INET module. |
| 256 | * |
| 257 | * FIXME: cleanup struct net_device such that network protocol info |
| 258 | * moves out. |
| 259 | */ |
| 260 | |
| 261 | struct net_device |
| 262 | { |
| 263 | |
| 264 | /* |
| 265 | * This is the first field of the "visible" part of this structure |
| 266 | * (i.e. as seen by users in the "Space.c" file). It is the name |
| 267 | * the interface. |
| 268 | */ |
| 269 | char name[IFNAMSIZ]; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 270 | /* device name hash chain */ |
| 271 | struct hlist_node name_hlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | /* |
| 274 | * I/O specific fields |
| 275 | * FIXME: Merge these and struct ifmap into one |
| 276 | */ |
| 277 | unsigned long mem_end; /* shared mem end */ |
| 278 | unsigned long mem_start; /* shared mem start */ |
| 279 | unsigned long base_addr; /* device I/O address */ |
| 280 | unsigned int irq; /* device IRQ number */ |
| 281 | |
| 282 | /* |
| 283 | * Some hardware also needs these fields, but they are not |
| 284 | * part of the usual set specified in Space.c. |
| 285 | */ |
| 286 | |
| 287 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
| 288 | unsigned char dma; /* DMA channel */ |
| 289 | |
| 290 | unsigned long state; |
| 291 | |
| 292 | struct net_device *next; |
| 293 | |
| 294 | /* The device initialization function. Called only once. */ |
| 295 | int (*init)(struct net_device *dev); |
| 296 | |
| 297 | /* ------- Fields preinitialized in Space.c finish here ------- */ |
| 298 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 299 | /* Net device features */ |
| 300 | unsigned long features; |
| 301 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ |
| 302 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ |
| 303 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
| 304 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ |
| 305 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
| 306 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ |
| 307 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ |
| 308 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ |
| 309 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ |
| 310 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 311 | #define NETIF_F_LLTX 4096 /* LockLess TX */ |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame^] | 312 | |
| 313 | /* Segmentation offload features */ |
| 314 | #define NETIF_F_GSO_SHIFT 16 |
| 315 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
| 316 | #define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT) |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 317 | |
Herbert Xu | 8648b30 | 2006-06-17 22:06:05 -0700 | [diff] [blame] | 318 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
| 319 | #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM) |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | struct net_device *next_sched; |
| 322 | |
| 323 | /* Interface index. Unique device identifier */ |
| 324 | int ifindex; |
| 325 | int iflink; |
| 326 | |
| 327 | |
| 328 | struct net_device_stats* (*get_stats)(struct net_device *dev); |
| 329 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); |
| 330 | |
| 331 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
| 332 | * See <net/iw_handler.h> for details. Jean II */ |
| 333 | const struct iw_handler_def * wireless_handlers; |
| 334 | /* Instance data managed by the core of Wireless Extensions. */ |
| 335 | struct iw_public_data * wireless_data; |
| 336 | |
| 337 | struct ethtool_ops *ethtool_ops; |
| 338 | |
| 339 | /* |
| 340 | * This marks the end of the "visible" part of the structure. All |
| 341 | * fields hereafter are internal to the system, and may change at |
| 342 | * will (read: may be cleaned up at will). |
| 343 | */ |
| 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 346 | unsigned int flags; /* interface flags (a la BSD) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | unsigned short gflags; |
| 348 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ |
| 349 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
| 350 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 351 | unsigned char operstate; /* RFC2863 operstate */ |
| 352 | unsigned char link_mode; /* mapping policy to operstate */ |
| 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | unsigned mtu; /* interface MTU value */ |
| 355 | unsigned short type; /* interface hardware type */ |
| 356 | unsigned short hard_header_len; /* hardware hdr length */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
| 358 | struct net_device *master; /* Pointer to master device of a group, |
| 359 | * which this device is member of. |
| 360 | */ |
| 361 | |
| 362 | /* Interface address info. */ |
Jon Wetzel | a6f9a70 | 2005-08-20 17:15:54 -0700 | [diff] [blame] | 363 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | unsigned char addr_len; /* hardware address length */ |
| 365 | unsigned short dev_id; /* for shared network cards */ |
| 366 | |
| 367 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ |
| 368 | int mc_count; /* Number of installed mcasts */ |
| 369 | int promiscuity; |
| 370 | int allmulti; |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
| 373 | /* Protocol specific pointers */ |
| 374 | |
| 375 | void *atalk_ptr; /* AppleTalk link */ |
| 376 | void *ip_ptr; /* IPv4 specific data */ |
| 377 | void *dn_ptr; /* DECnet specific data */ |
| 378 | void *ip6_ptr; /* IPv6 specific data */ |
| 379 | void *ec_ptr; /* Econet specific data */ |
| 380 | void *ax25_ptr; /* AX.25 specific data */ |
| 381 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 382 | /* |
| 383 | * Cache line mostly used on receive path (including eth_type_trans()) |
| 384 | */ |
| 385 | struct list_head poll_list ____cacheline_aligned_in_smp; |
| 386 | /* Link to poll list */ |
| 387 | |
| 388 | int (*poll) (struct net_device *dev, int *quota); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | int quota; |
| 390 | int weight; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 391 | unsigned long last_rx; /* Time of last Rx */ |
| 392 | /* Interface address info used in eth_type_trans() */ |
| 393 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast |
| 394 | because most packets are unicast) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 396 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| 397 | |
| 398 | /* |
| 399 | * Cache line mostly used on queue transmit path (qdisc) |
| 400 | */ |
| 401 | /* device queue lock */ |
| 402 | spinlock_t queue_lock ____cacheline_aligned_in_smp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | struct Qdisc *qdisc; |
| 404 | struct Qdisc *qdisc_sleeping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | struct list_head qdisc_list; |
| 406 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
| 407 | |
| 408 | /* ingress path synchronizer */ |
| 409 | spinlock_t ingress_lock; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 410 | struct Qdisc *qdisc_ingress; |
| 411 | |
| 412 | /* |
| 413 | * One part is mostly used on xmit path (device) |
| 414 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | /* hard_start_xmit synchronizer */ |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 416 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | /* cpu id of processor entered to hard_start_xmit or -1, |
| 418 | if nobody entered there. |
| 419 | */ |
| 420 | int xmit_lock_owner; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 421 | void *priv; /* pointer to private data */ |
| 422 | int (*hard_start_xmit) (struct sk_buff *skb, |
| 423 | struct net_device *dev); |
| 424 | /* These may be needed for future network-power-down code. */ |
| 425 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
| 426 | |
| 427 | int watchdog_timeo; /* used by dev_watchdog() */ |
| 428 | struct timer_list watchdog_timer; |
| 429 | |
| 430 | /* |
| 431 | * refcnt is a very hot point, so align it on SMP |
| 432 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | /* Number of references to this device */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 434 | atomic_t refcnt ____cacheline_aligned_in_smp; |
| 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | /* delayed register/unregister */ |
| 437 | struct list_head todo_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | /* device index hash chain */ |
| 439 | struct hlist_node index_hlist; |
| 440 | |
| 441 | /* register/unregister state machine */ |
| 442 | enum { NETREG_UNINITIALIZED=0, |
Stephen Hemminger | b17a7c1 | 2006-05-10 13:21:17 -0700 | [diff] [blame] | 443 | NETREG_REGISTERED, /* completed register_netdevice */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
| 445 | NETREG_UNREGISTERED, /* completed unregister todo */ |
| 446 | NETREG_RELEASED, /* called free_netdev */ |
| 447 | } reg_state; |
| 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | /* Called after device is detached from network. */ |
| 450 | void (*uninit)(struct net_device *dev); |
| 451 | /* Called after last user reference disappears. */ |
| 452 | void (*destructor)(struct net_device *dev); |
| 453 | |
| 454 | /* Pointers to interface service routines. */ |
| 455 | int (*open)(struct net_device *dev); |
| 456 | int (*stop)(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | #define HAVE_NETDEV_POLL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | int (*hard_header) (struct sk_buff *skb, |
| 459 | struct net_device *dev, |
| 460 | unsigned short type, |
| 461 | void *daddr, |
| 462 | void *saddr, |
| 463 | unsigned len); |
| 464 | int (*rebuild_header)(struct sk_buff *skb); |
| 465 | #define HAVE_MULTICAST |
| 466 | void (*set_multicast_list)(struct net_device *dev); |
| 467 | #define HAVE_SET_MAC_ADDR |
| 468 | int (*set_mac_address)(struct net_device *dev, |
| 469 | void *addr); |
| 470 | #define HAVE_PRIVATE_IOCTL |
| 471 | int (*do_ioctl)(struct net_device *dev, |
| 472 | struct ifreq *ifr, int cmd); |
| 473 | #define HAVE_SET_CONFIG |
| 474 | int (*set_config)(struct net_device *dev, |
| 475 | struct ifmap *map); |
| 476 | #define HAVE_HEADER_CACHE |
| 477 | int (*hard_header_cache)(struct neighbour *neigh, |
| 478 | struct hh_cache *hh); |
| 479 | void (*header_cache_update)(struct hh_cache *hh, |
| 480 | struct net_device *dev, |
| 481 | unsigned char * haddr); |
| 482 | #define HAVE_CHANGE_MTU |
| 483 | int (*change_mtu)(struct net_device *dev, int new_mtu); |
| 484 | |
| 485 | #define HAVE_TX_TIMEOUT |
| 486 | void (*tx_timeout) (struct net_device *dev); |
| 487 | |
| 488 | void (*vlan_rx_register)(struct net_device *dev, |
| 489 | struct vlan_group *grp); |
| 490 | void (*vlan_rx_add_vid)(struct net_device *dev, |
| 491 | unsigned short vid); |
| 492 | void (*vlan_rx_kill_vid)(struct net_device *dev, |
| 493 | unsigned short vid); |
| 494 | |
| 495 | int (*hard_header_parse)(struct sk_buff *skb, |
| 496 | unsigned char *haddr); |
| 497 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); |
| 498 | #ifdef CONFIG_NETPOLL |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 499 | struct netpoll_info *npinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | #endif |
| 501 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 502 | void (*poll_controller)(struct net_device *dev); |
| 503 | #endif |
| 504 | |
| 505 | /* bridge stuff */ |
| 506 | struct net_bridge_port *br_port; |
| 507 | |
| 508 | #ifdef CONFIG_NET_DIVERT |
| 509 | /* this will get initialized at each interface type init routine */ |
| 510 | struct divert_blk *divert; |
| 511 | #endif /* CONFIG_NET_DIVERT */ |
| 512 | |
| 513 | /* class/net/name entry */ |
| 514 | struct class_device class_dev; |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 515 | /* space for optional statistics and wireless sysfs groups */ |
| 516 | struct attribute_group *sysfs_groups[3]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | }; |
| 518 | |
| 519 | #define NETDEV_ALIGN 32 |
| 520 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) |
| 521 | |
| 522 | static inline void *netdev_priv(struct net_device *dev) |
| 523 | { |
| 524 | return (char *)dev + ((sizeof(struct net_device) |
| 525 | + NETDEV_ALIGN_CONST) |
| 526 | & ~NETDEV_ALIGN_CONST); |
| 527 | } |
| 528 | |
| 529 | #define SET_MODULE_OWNER(dev) do { } while (0) |
| 530 | /* Set the sysfs physical device reference for the network logical device |
| 531 | * if set prior to registration will cause a symlink during initialization. |
| 532 | */ |
| 533 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) |
| 534 | |
| 535 | struct packet_type { |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 536 | __be16 type; /* This is really htons(ether_type). */ |
| 537 | struct net_device *dev; /* NULL is wildcarded here */ |
| 538 | int (*func) (struct sk_buff *, |
| 539 | struct net_device *, |
| 540 | struct packet_type *, |
| 541 | struct net_device *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | void *af_packet_priv; |
| 543 | struct list_head list; |
| 544 | }; |
| 545 | |
| 546 | #include <linux/interrupt.h> |
| 547 | #include <linux/notifier.h> |
| 548 | |
| 549 | extern struct net_device loopback_dev; /* The loopback */ |
| 550 | extern struct net_device *dev_base; /* All devices */ |
| 551 | extern rwlock_t dev_base_lock; /* Device list lock */ |
| 552 | |
| 553 | extern int netdev_boot_setup_check(struct net_device *dev); |
| 554 | extern unsigned long netdev_boot_base(const char *prefix, int unit); |
| 555 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); |
| 556 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); |
| 557 | extern void dev_add_pack(struct packet_type *pt); |
| 558 | extern void dev_remove_pack(struct packet_type *pt); |
| 559 | extern void __dev_remove_pack(struct packet_type *pt); |
| 560 | |
| 561 | extern struct net_device *dev_get_by_flags(unsigned short flags, |
| 562 | unsigned short mask); |
| 563 | extern struct net_device *dev_get_by_name(const char *name); |
| 564 | extern struct net_device *__dev_get_by_name(const char *name); |
| 565 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
| 566 | extern int dev_open(struct net_device *dev); |
| 567 | extern int dev_close(struct net_device *dev); |
| 568 | extern int dev_queue_xmit(struct sk_buff *skb); |
| 569 | extern int register_netdevice(struct net_device *dev); |
| 570 | extern int unregister_netdevice(struct net_device *dev); |
| 571 | extern void free_netdev(struct net_device *dev); |
| 572 | extern void synchronize_net(void); |
| 573 | extern int register_netdevice_notifier(struct notifier_block *nb); |
| 574 | extern int unregister_netdevice_notifier(struct notifier_block *nb); |
| 575 | extern int call_netdevice_notifiers(unsigned long val, void *v); |
| 576 | extern struct net_device *dev_get_by_index(int ifindex); |
| 577 | extern struct net_device *__dev_get_by_index(int ifindex); |
| 578 | extern int dev_restart(struct net_device *dev); |
| 579 | #ifdef CONFIG_NETPOLL_TRAP |
| 580 | extern int netpoll_trap(void); |
| 581 | #endif |
| 582 | |
| 583 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
| 584 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
| 585 | static inline int unregister_gifconf(unsigned int family) |
| 586 | { |
| 587 | return register_gifconf(family, NULL); |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * Incoming packets are placed on per-cpu queues so that |
| 592 | * no locking is needed. |
| 593 | */ |
| 594 | |
| 595 | struct softnet_data |
| 596 | { |
Stephen Hemminger | 31aa02c | 2005-06-23 20:12:48 -0700 | [diff] [blame] | 597 | struct net_device *output_queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | struct sk_buff_head input_pkt_queue; |
| 599 | struct list_head poll_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | struct sk_buff *completion_queue; |
| 601 | |
| 602 | struct net_device backlog_dev; /* Sorry. 8) */ |
Chris Leech | db21733 | 2006-06-17 21:24:58 -0700 | [diff] [blame] | 603 | #ifdef CONFIG_NET_DMA |
| 604 | struct dma_chan *net_dma; |
| 605 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | }; |
| 607 | |
| 608 | DECLARE_PER_CPU(struct softnet_data,softnet_data); |
| 609 | |
| 610 | #define HAVE_NETIF_QUEUE |
| 611 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 612 | extern void __netif_schedule(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | static inline void netif_schedule(struct net_device *dev) |
| 615 | { |
| 616 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) |
| 617 | __netif_schedule(dev); |
| 618 | } |
| 619 | |
| 620 | static inline void netif_start_queue(struct net_device *dev) |
| 621 | { |
| 622 | clear_bit(__LINK_STATE_XOFF, &dev->state); |
| 623 | } |
| 624 | |
| 625 | static inline void netif_wake_queue(struct net_device *dev) |
| 626 | { |
| 627 | #ifdef CONFIG_NETPOLL_TRAP |
| 628 | if (netpoll_trap()) |
| 629 | return; |
| 630 | #endif |
| 631 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) |
| 632 | __netif_schedule(dev); |
| 633 | } |
| 634 | |
| 635 | static inline void netif_stop_queue(struct net_device *dev) |
| 636 | { |
| 637 | #ifdef CONFIG_NETPOLL_TRAP |
| 638 | if (netpoll_trap()) |
| 639 | return; |
| 640 | #endif |
| 641 | set_bit(__LINK_STATE_XOFF, &dev->state); |
| 642 | } |
| 643 | |
| 644 | static inline int netif_queue_stopped(const struct net_device *dev) |
| 645 | { |
| 646 | return test_bit(__LINK_STATE_XOFF, &dev->state); |
| 647 | } |
| 648 | |
| 649 | static inline int netif_running(const struct net_device *dev) |
| 650 | { |
| 651 | return test_bit(__LINK_STATE_START, &dev->state); |
| 652 | } |
| 653 | |
| 654 | |
| 655 | /* Use this variant when it is known for sure that it |
| 656 | * is executing from interrupt context. |
| 657 | */ |
| 658 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
| 659 | { |
| 660 | if (atomic_dec_and_test(&skb->users)) { |
| 661 | struct softnet_data *sd; |
| 662 | unsigned long flags; |
| 663 | |
| 664 | local_irq_save(flags); |
| 665 | sd = &__get_cpu_var(softnet_data); |
| 666 | skb->next = sd->completion_queue; |
| 667 | sd->completion_queue = skb; |
| 668 | raise_softirq_irqoff(NET_TX_SOFTIRQ); |
| 669 | local_irq_restore(flags); |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | /* Use this variant in places where it could be invoked |
| 674 | * either from interrupt or non-interrupt context. |
| 675 | */ |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 676 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | #define HAVE_NETIF_RX 1 |
| 679 | extern int netif_rx(struct sk_buff *skb); |
| 680 | extern int netif_rx_ni(struct sk_buff *skb); |
| 681 | #define HAVE_NETIF_RECEIVE_SKB 1 |
| 682 | extern int netif_receive_skb(struct sk_buff *skb); |
Mitch Williams | c2373ee | 2005-11-09 10:34:45 -0800 | [diff] [blame] | 683 | extern int dev_valid_name(const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | extern int dev_ioctl(unsigned int cmd, void __user *); |
| 685 | extern int dev_ethtool(struct ifreq *); |
| 686 | extern unsigned dev_get_flags(const struct net_device *); |
| 687 | extern int dev_change_flags(struct net_device *, unsigned); |
| 688 | extern int dev_change_name(struct net_device *, char *); |
| 689 | extern int dev_set_mtu(struct net_device *, int); |
| 690 | extern int dev_set_mac_address(struct net_device *, |
| 691 | struct sockaddr *); |
| 692 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
| 693 | |
| 694 | extern void dev_init(void); |
| 695 | |
| 696 | extern int netdev_nit; |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 697 | extern int netdev_budget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | /* Called by rtnetlink.c:rtnl_unlock() */ |
| 700 | extern void netdev_run_todo(void); |
| 701 | |
| 702 | static inline void dev_put(struct net_device *dev) |
| 703 | { |
| 704 | atomic_dec(&dev->refcnt); |
| 705 | } |
| 706 | |
Stephen Hemminger | 1533306 | 2006-03-20 22:32:28 -0800 | [diff] [blame] | 707 | static inline void dev_hold(struct net_device *dev) |
| 708 | { |
| 709 | atomic_inc(&dev->refcnt); |
| 710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
| 713 | * and _off may be called from IRQ context, but it is caller |
| 714 | * who is responsible for serialization of these calls. |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 715 | * |
| 716 | * The name carrier is inappropriate, these functions should really be |
| 717 | * called netif_lowerlayer_*() because they represent the state of any |
| 718 | * kind of lower layer not just hardware media. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | */ |
| 720 | |
| 721 | extern void linkwatch_fire_event(struct net_device *dev); |
| 722 | |
| 723 | static inline int netif_carrier_ok(const struct net_device *dev) |
| 724 | { |
| 725 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| 726 | } |
| 727 | |
| 728 | extern void __netdev_watchdog_up(struct net_device *dev); |
| 729 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 730 | extern void netif_carrier_on(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 732 | extern void netif_carrier_off(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 734 | static inline void netif_dormant_on(struct net_device *dev) |
| 735 | { |
| 736 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 737 | linkwatch_fire_event(dev); |
| 738 | } |
| 739 | |
| 740 | static inline void netif_dormant_off(struct net_device *dev) |
| 741 | { |
| 742 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 743 | linkwatch_fire_event(dev); |
| 744 | } |
| 745 | |
| 746 | static inline int netif_dormant(const struct net_device *dev) |
| 747 | { |
| 748 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
| 749 | } |
| 750 | |
| 751 | |
| 752 | static inline int netif_oper_up(const struct net_device *dev) { |
| 753 | return (dev->operstate == IF_OPER_UP || |
| 754 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
| 755 | } |
| 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | /* Hot-plugging. */ |
| 758 | static inline int netif_device_present(struct net_device *dev) |
| 759 | { |
| 760 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| 761 | } |
| 762 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 763 | extern void netif_device_detach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 765 | extern void netif_device_attach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | /* |
| 768 | * Network interface message level settings |
| 769 | */ |
| 770 | #define HAVE_NETIF_MSG 1 |
| 771 | |
| 772 | enum { |
| 773 | NETIF_MSG_DRV = 0x0001, |
| 774 | NETIF_MSG_PROBE = 0x0002, |
| 775 | NETIF_MSG_LINK = 0x0004, |
| 776 | NETIF_MSG_TIMER = 0x0008, |
| 777 | NETIF_MSG_IFDOWN = 0x0010, |
| 778 | NETIF_MSG_IFUP = 0x0020, |
| 779 | NETIF_MSG_RX_ERR = 0x0040, |
| 780 | NETIF_MSG_TX_ERR = 0x0080, |
| 781 | NETIF_MSG_TX_QUEUED = 0x0100, |
| 782 | NETIF_MSG_INTR = 0x0200, |
| 783 | NETIF_MSG_TX_DONE = 0x0400, |
| 784 | NETIF_MSG_RX_STATUS = 0x0800, |
| 785 | NETIF_MSG_PKTDATA = 0x1000, |
| 786 | NETIF_MSG_HW = 0x2000, |
| 787 | NETIF_MSG_WOL = 0x4000, |
| 788 | }; |
| 789 | |
| 790 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
| 791 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
| 792 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
| 793 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
| 794 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
| 795 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
| 796 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
| 797 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
| 798 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
| 799 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
| 800 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
| 801 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
| 802 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
| 803 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
| 804 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
| 805 | |
| 806 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
| 807 | { |
| 808 | /* use default */ |
| 809 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
| 810 | return default_msg_enable_bits; |
| 811 | if (debug_value == 0) /* no output */ |
| 812 | return 0; |
| 813 | /* set low N bits */ |
| 814 | return (1 << debug_value) - 1; |
| 815 | } |
| 816 | |
shemminger@osdl.org | 0a12257 | 2005-11-30 11:45:17 -0800 | [diff] [blame] | 817 | /* Test if receive needs to be scheduled */ |
| 818 | static inline int __netif_rx_schedule_prep(struct net_device *dev) |
Stephen Hemminger | 793b883 | 2005-09-14 16:06:14 -0700 | [diff] [blame] | 819 | { |
| 820 | return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); |
| 821 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
shemminger@osdl.org | 0a12257 | 2005-11-30 11:45:17 -0800 | [diff] [blame] | 823 | /* Test if receive needs to be scheduled but only if up */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
| 825 | { |
shemminger@osdl.org | 0a12257 | 2005-11-30 11:45:17 -0800 | [diff] [blame] | 826 | return netif_running(dev) && __netif_rx_schedule_prep(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | /* Add interface to tail of rx poll list. This assumes that _prep has |
| 830 | * already been called and returned 1. |
| 831 | */ |
| 832 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 833 | extern void __netif_rx_schedule(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
| 835 | /* Try to reschedule poll. Called by irq handler. */ |
| 836 | |
| 837 | static inline void netif_rx_schedule(struct net_device *dev) |
| 838 | { |
| 839 | if (netif_rx_schedule_prep(dev)) |
| 840 | __netif_rx_schedule(dev); |
| 841 | } |
| 842 | |
Stephen Hemminger | d324031 | 2006-05-08 15:11:26 -0700 | [diff] [blame] | 843 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). |
| 844 | * Do not inline this? |
| 845 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) |
| 847 | { |
| 848 | if (netif_rx_schedule_prep(dev)) { |
| 849 | unsigned long flags; |
Stephen Hemminger | d324031 | 2006-05-08 15:11:26 -0700 | [diff] [blame] | 850 | |
| 851 | dev->quota += undo; |
| 852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | local_irq_save(flags); |
Stephen Hemminger | d324031 | 2006-05-08 15:11:26 -0700 | [diff] [blame] | 854 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); |
| 855 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | local_irq_restore(flags); |
| 857 | return 1; |
| 858 | } |
| 859 | return 0; |
| 860 | } |
| 861 | |
| 862 | /* Remove interface from poll list: it must be in the poll list |
| 863 | * on current cpu. This primitive is called by dev->poll(), when |
| 864 | * it completes the work. The device cannot be out of poll list at this |
| 865 | * moment, it is BUG(). |
| 866 | */ |
| 867 | static inline void netif_rx_complete(struct net_device *dev) |
| 868 | { |
| 869 | unsigned long flags; |
| 870 | |
| 871 | local_irq_save(flags); |
| 872 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); |
| 873 | list_del(&dev->poll_list); |
| 874 | smp_mb__before_clear_bit(); |
| 875 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
| 876 | local_irq_restore(flags); |
| 877 | } |
| 878 | |
| 879 | static inline void netif_poll_disable(struct net_device *dev) |
| 880 | { |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 881 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | /* No hurry. */ |
Nishanth Aravamudan | 3173c89 | 2005-09-11 02:09:55 -0700 | [diff] [blame] | 883 | schedule_timeout_interruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | static inline void netif_poll_enable(struct net_device *dev) |
| 887 | { |
| 888 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
| 889 | } |
| 890 | |
| 891 | /* same as netif_rx_complete, except that local_irq_save(flags) |
| 892 | * has already been issued |
| 893 | */ |
| 894 | static inline void __netif_rx_complete(struct net_device *dev) |
| 895 | { |
| 896 | BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state)); |
| 897 | list_del(&dev->poll_list); |
| 898 | smp_mb__before_clear_bit(); |
| 899 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
| 900 | } |
| 901 | |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 902 | static inline void netif_tx_lock(struct net_device *dev) |
| 903 | { |
| 904 | spin_lock(&dev->_xmit_lock); |
| 905 | dev->xmit_lock_owner = smp_processor_id(); |
| 906 | } |
| 907 | |
| 908 | static inline void netif_tx_lock_bh(struct net_device *dev) |
| 909 | { |
| 910 | spin_lock_bh(&dev->_xmit_lock); |
| 911 | dev->xmit_lock_owner = smp_processor_id(); |
| 912 | } |
| 913 | |
| 914 | static inline int netif_tx_trylock(struct net_device *dev) |
| 915 | { |
| 916 | int err = spin_trylock(&dev->_xmit_lock); |
| 917 | if (!err) |
| 918 | dev->xmit_lock_owner = smp_processor_id(); |
| 919 | return err; |
| 920 | } |
| 921 | |
| 922 | static inline void netif_tx_unlock(struct net_device *dev) |
| 923 | { |
| 924 | dev->xmit_lock_owner = -1; |
| 925 | spin_unlock(&dev->_xmit_lock); |
| 926 | } |
| 927 | |
| 928 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
| 929 | { |
| 930 | dev->xmit_lock_owner = -1; |
| 931 | spin_unlock_bh(&dev->_xmit_lock); |
| 932 | } |
| 933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | static inline void netif_tx_disable(struct net_device *dev) |
| 935 | { |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 936 | netif_tx_lock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | netif_stop_queue(dev); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 938 | netif_tx_unlock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
| 942 | |
| 943 | extern void ether_setup(struct net_device *dev); |
| 944 | |
| 945 | /* Support for loadable net-drivers */ |
| 946 | extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, |
| 947 | void (*setup)(struct net_device *)); |
| 948 | extern int register_netdev(struct net_device *dev); |
| 949 | extern void unregister_netdev(struct net_device *dev); |
| 950 | /* Functions used for multicast support */ |
| 951 | extern void dev_mc_upload(struct net_device *dev); |
| 952 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
| 953 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); |
| 954 | extern void dev_mc_discard(struct net_device *dev); |
| 955 | extern void dev_set_promiscuity(struct net_device *dev, int inc); |
| 956 | extern void dev_set_allmulti(struct net_device *dev, int inc); |
| 957 | extern void netdev_state_change(struct net_device *dev); |
Stephen Hemminger | d8a33ac | 2005-05-29 14:13:47 -0700 | [diff] [blame] | 958 | extern void netdev_features_change(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | /* Load a device via the kmod */ |
| 960 | extern void dev_load(const char *name); |
| 961 | extern void dev_mcast_init(void); |
| 962 | extern int netdev_max_backlog; |
| 963 | extern int weight_p; |
| 964 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
| 965 | extern int skb_checksum_help(struct sk_buff *skb, int inward); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 966 | #ifdef CONFIG_BUG |
| 967 | extern void netdev_rx_csum_fault(struct net_device *dev); |
| 968 | #else |
| 969 | static inline void netdev_rx_csum_fault(struct net_device *dev) |
| 970 | { |
| 971 | } |
| 972 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | /* rx skb timestamps */ |
| 974 | extern void net_enable_timestamp(void); |
| 975 | extern void net_disable_timestamp(void); |
| 976 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 977 | #ifdef CONFIG_PROC_FS |
| 978 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); |
| 979 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); |
| 980 | extern void dev_seq_stop(struct seq_file *seq, void *v); |
| 981 | #endif |
| 982 | |
| 983 | extern void linkwatch_run_queue(void); |
| 984 | |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame^] | 985 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
| 986 | { |
| 987 | int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT; |
| 988 | return skb_shinfo(skb)->gso_size && |
| 989 | (dev->features & feature) != feature; |
| 990 | } |
| 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | #endif /* __KERNEL__ */ |
| 993 | |
| 994 | #endif /* _LINUX_DEV_H */ |