2005-04-16 16:20:36 -06:00
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the Interfaces handler.
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*
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* Version: @(#)dev.h 1.0.10 08/12/93
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*
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2005-05-05 17:16:16 -06:00
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* Authors: Ross Biro
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2005-04-16 16:20:36 -06:00
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Corey Minyard <wf-rch!minyard@relay.EU.net>
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* Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
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2008-10-13 20:01:08 -06:00
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* Alan Cox, <alan@lxorguk.ukuu.org.uk>
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2005-04-16 16:20:36 -06:00
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* Bjorn Ekwall. <bj0rn@blox.se>
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* Pekka Riikonen <priikone@poseidon.pspt.fi>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Moved to /usr/include/linux for NET3
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*/
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#ifndef _LINUX_NETDEVICE_H
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#define _LINUX_NETDEVICE_H
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#include <linux/if.h>
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#include <linux/if_ether.h>
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#include <linux/if_packet.h>
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#ifdef __KERNEL__
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2006-12-03 21:15:30 -07:00
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#include <linux/timer.h>
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[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
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#include <linux/delay.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/atomic.h>
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#include <asm/cache.h>
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#include <asm/byteorder.h>
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#include <linux/device.h>
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#include <linux/percpu.h>
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2006-06-17 22:24:58 -06:00
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#include <linux/dmaengine.h>
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[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
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#include <linux/workqueue.h>
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2005-04-16 16:20:36 -06:00
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2007-09-12 06:57:09 -06:00
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#include <net/net_namespace.h>
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2008-10-07 07:45:02 -06:00
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#include <net/dsa.h>
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2007-09-12 06:57:09 -06:00
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2005-04-16 16:20:36 -06:00
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struct vlan_group;
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struct ethtool_ops;
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2005-06-22 23:05:31 -06:00
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struct netpoll_info;
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2007-04-23 13:20:05 -06:00
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/* 802.11 specific */
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struct wireless_dev;
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2005-04-16 16:20:36 -06:00
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/* source back-compat hooks */
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#define SET_ETHTOOL_OPS(netdev,ops) \
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( (netdev)->ethtool_ops = (ops) )
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#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
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functions are available. */
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#define HAVE_FREE_NETDEV /* free_netdev() */
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#define HAVE_NETDEV_PRIV /* netdev_priv() */
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#define NET_XMIT_SUCCESS 0
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#define NET_XMIT_DROP 1 /* skb dropped */
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#define NET_XMIT_CN 2 /* congestion notification */
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#define NET_XMIT_POLICED 3 /* skb is shot by police */
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2008-08-04 23:31:03 -06:00
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#define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
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2005-04-16 16:20:36 -06:00
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/* Backlog congestion levels */
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#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
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#define NET_RX_DROP 1 /* packet dropped */
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#define NET_RX_CN_LOW 2 /* storm alert, just in case */
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#define NET_RX_CN_MOD 3 /* Storm on its way! */
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#define NET_RX_CN_HIGH 4 /* The storm is here */
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#define NET_RX_BAD 5 /* packet dropped due to kernel error */
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2006-11-14 06:21:36 -07:00
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/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
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* indicates that the device will soon be dropping packets, or already drops
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* some packets of the same priority; prompting us to send less aggressively. */
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#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
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2005-04-16 16:20:36 -06:00
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#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
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#endif
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#define MAX_ADDR_LEN 32 /* Largest hardware address length */
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/* Driver transmit return codes */
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#define NETDEV_TX_OK 0 /* driver took care of packet */
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#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
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#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
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2008-06-27 20:54:54 -06:00
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#ifdef __KERNEL__
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2005-04-16 16:20:36 -06:00
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/*
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* Compute the worst case header length according to the protocols
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* used.
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*/
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2008-05-12 21:17:33 -06:00
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#if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
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# if defined(CONFIG_MAC80211_MESH)
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# define LL_MAX_HEADER 128
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# else
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# define LL_MAX_HEADER 96
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# endif
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#elif defined(CONFIG_TR)
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# define LL_MAX_HEADER 48
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2005-04-16 16:20:36 -06:00
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#else
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2008-05-12 21:17:33 -06:00
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# define LL_MAX_HEADER 32
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2005-04-16 16:20:36 -06:00
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#endif
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2006-11-28 21:53:39 -07:00
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#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
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!defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
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!defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
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!defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
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2005-04-16 16:20:36 -06:00
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#define MAX_HEADER LL_MAX_HEADER
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#else
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#define MAX_HEADER (LL_MAX_HEADER + 48)
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#endif
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2008-06-27 20:54:54 -06:00
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#endif /* __KERNEL__ */
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2005-04-16 16:20:36 -06:00
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/*
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* Network device statistics. Akin to the 2.0 ether stats but
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* with byte counters.
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*/
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struct net_device_stats
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{
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unsigned long rx_packets; /* total packets received */
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unsigned long tx_packets; /* total packets transmitted */
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unsigned long rx_bytes; /* total bytes received */
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unsigned long tx_bytes; /* total bytes transmitted */
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unsigned long rx_errors; /* bad packets received */
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unsigned long tx_errors; /* packet transmit problems */
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unsigned long rx_dropped; /* no space in linux buffers */
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unsigned long tx_dropped; /* no space available in linux */
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unsigned long multicast; /* multicast packets received */
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unsigned long collisions;
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/* detailed rx_errors: */
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unsigned long rx_length_errors;
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unsigned long rx_over_errors; /* receiver ring buff overflow */
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unsigned long rx_crc_errors; /* recved pkt with crc error */
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unsigned long rx_frame_errors; /* recv'd frame alignment error */
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unsigned long rx_fifo_errors; /* recv'r fifo overrun */
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unsigned long rx_missed_errors; /* receiver missed packet */
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/* detailed tx_errors */
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unsigned long tx_aborted_errors;
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unsigned long tx_carrier_errors;
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unsigned long tx_fifo_errors;
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unsigned long tx_heartbeat_errors;
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unsigned long tx_window_errors;
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/* for cslip etc */
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unsigned long rx_compressed;
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unsigned long tx_compressed;
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};
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/* Media selection options. */
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enum {
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IF_PORT_UNKNOWN = 0,
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IF_PORT_10BASE2,
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IF_PORT_10BASET,
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IF_PORT_AUI,
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IF_PORT_100BASET,
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IF_PORT_100BASETX,
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IF_PORT_100BASEFX
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};
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#ifdef __KERNEL__
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#include <linux/cache.h>
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#include <linux/skbuff.h>
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struct neighbour;
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struct neigh_parms;
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struct sk_buff;
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struct netif_rx_stats
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{
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unsigned total;
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unsigned dropped;
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unsigned time_squeeze;
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unsigned cpu_collision;
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};
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DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
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2007-06-27 02:26:19 -06:00
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struct dev_addr_list
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{
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struct dev_addr_list *next;
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u8 da_addr[MAX_ADDR_LEN];
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u8 da_addrlen;
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2007-07-14 19:52:02 -06:00
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u8 da_synced;
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2007-06-27 02:26:19 -06:00
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int da_users;
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int da_gusers;
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};
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2005-04-16 16:20:36 -06:00
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/*
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* We tag multicasts with these structures.
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*/
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2007-06-27 02:26:58 -06:00
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#define dev_mc_list dev_addr_list
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#define dmi_addr da_addr
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#define dmi_addrlen da_addrlen
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#define dmi_users da_users
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#define dmi_gusers da_gusers
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2005-04-16 16:20:36 -06:00
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struct hh_cache
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{
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struct hh_cache *hh_next; /* Next entry */
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atomic_t hh_refcnt; /* number of users */
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2006-12-08 01:08:43 -07:00
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/*
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* We want hh_output, hh_len, hh_lock and hh_data be a in a separate
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* cache line on SMP.
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* They are mostly read, but hh_refcnt may be changed quite frequently,
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* incurring cache line ping pongs.
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*/
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__be16 hh_type ____cacheline_aligned_in_smp;
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/* protocol identifier, f.e ETH_P_IP
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2005-04-16 16:20:36 -06:00
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* NOTE: For VLANs, this will be the
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* encapuslated type. --BLG
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*/
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2006-11-27 12:58:02 -07:00
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u16 hh_len; /* length of header */
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2005-04-16 16:20:36 -06:00
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int (*hh_output)(struct sk_buff *skb);
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2006-12-07 16:08:17 -07:00
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seqlock_t hh_lock;
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2005-04-16 16:20:36 -06:00
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/* cached hardware header; allow for machine alignment needs. */
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#define HH_DATA_MOD 16
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#define HH_DATA_OFF(__len) \
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2005-06-02 17:48:05 -06:00
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(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
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2005-04-16 16:20:36 -06:00
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#define HH_DATA_ALIGN(__len) \
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(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
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unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
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};
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/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
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* Alternative is:
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* dev->hard_header_len ? (dev->hard_header_len +
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* (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
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*
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* We could use other alignment values, but we must maintain the
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* relationship HH alignment <= LL alignment.
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2008-05-12 21:48:31 -06:00
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*
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* LL_ALLOCATED_SPACE also takes into account the tailroom the device
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* may need.
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2005-04-16 16:20:36 -06:00
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*/
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#define LL_RESERVED_SPACE(dev) \
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2008-05-12 21:48:31 -06:00
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((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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2005-04-16 16:20:36 -06:00
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#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
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2008-05-12 21:48:31 -06:00
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((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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#define LL_ALLOCATED_SPACE(dev) \
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((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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2005-04-16 16:20:36 -06:00
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2007-10-09 02:40:57 -06:00
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struct header_ops {
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int (*create) (struct sk_buff *skb, struct net_device *dev,
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unsigned short type, const void *daddr,
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const void *saddr, unsigned len);
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int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
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int (*rebuild)(struct sk_buff *skb);
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#define HAVE_HEADER_CACHE
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int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
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void (*cache_update)(struct hh_cache *hh,
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const struct net_device *dev,
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const unsigned char *haddr);
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};
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2005-04-16 16:20:36 -06:00
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/* These flag bits are private to the generic network queueing
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* layer, they may not be explicitly referenced by any other
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* code.
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*/
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enum netdev_state_t
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{
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__LINK_STATE_START,
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__LINK_STATE_PRESENT,
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__LINK_STATE_NOCARRIER,
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2006-03-20 18:09:11 -07:00
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__LINK_STATE_LINKWATCH_PENDING,
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__LINK_STATE_DORMANT,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This structure holds at boot time configured netdevice settings. They
|
|
|
|
* are then used in the device probing.
|
|
|
|
*/
|
|
|
|
struct netdev_boot_setup {
|
|
|
|
char name[IFNAMSIZ];
|
|
|
|
struct ifmap map;
|
|
|
|
};
|
|
|
|
#define NETDEV_BOOT_SETUP_MAX 8
|
|
|
|
|
2005-08-15 23:18:02 -06:00
|
|
|
extern int __init netdev_boot_setup(char *str);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/*
|
|
|
|
* Structure for NAPI scheduling similar to tasklet but with weighting
|
|
|
|
*/
|
|
|
|
struct napi_struct {
|
|
|
|
/* The poll_list must only be managed by the entity which
|
|
|
|
* changes the state of the NAPI_STATE_SCHED bit. This means
|
|
|
|
* whoever atomically sets that bit can add this napi_struct
|
|
|
|
* to the per-cpu poll_list, and whoever clears that bit
|
|
|
|
* can remove from the list right before clearing the bit.
|
|
|
|
*/
|
|
|
|
struct list_head poll_list;
|
|
|
|
|
|
|
|
unsigned long state;
|
|
|
|
int weight;
|
|
|
|
int (*poll)(struct napi_struct *, int);
|
|
|
|
#ifdef CONFIG_NETPOLL
|
|
|
|
spinlock_t poll_lock;
|
|
|
|
int poll_owner;
|
|
|
|
struct net_device *dev;
|
|
|
|
struct list_head dev_list;
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
NAPI_STATE_SCHED, /* Poll is scheduled */
|
2008-01-07 21:35:07 -07:00
|
|
|
NAPI_STATE_DISABLE, /* Disable pending */
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
};
|
|
|
|
|
2008-02-13 16:03:15 -07:00
|
|
|
extern void __napi_schedule(struct napi_struct *n);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
|
2008-01-07 21:35:07 -07:00
|
|
|
static inline int napi_disable_pending(struct napi_struct *n)
|
|
|
|
{
|
|
|
|
return test_bit(NAPI_STATE_DISABLE, &n->state);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* napi_schedule_prep - check if napi can be scheduled
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Test if NAPI routine is already running, and if not mark
|
|
|
|
* it as running. This is used as a condition variable
|
2008-01-07 21:35:07 -07:00
|
|
|
* insure only one NAPI poll instance runs. We also make
|
|
|
|
* sure there is no pending NAPI disable.
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
*/
|
|
|
|
static inline int napi_schedule_prep(struct napi_struct *n)
|
|
|
|
{
|
2008-01-07 21:35:07 -07:00
|
|
|
return !napi_disable_pending(n) &&
|
|
|
|
!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* napi_schedule - schedule NAPI poll
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Schedule NAPI poll routine to be called if it is not already
|
|
|
|
* running.
|
|
|
|
*/
|
|
|
|
static inline void napi_schedule(struct napi_struct *n)
|
|
|
|
{
|
|
|
|
if (napi_schedule_prep(n))
|
|
|
|
__napi_schedule(n);
|
|
|
|
}
|
|
|
|
|
2007-10-09 16:47:37 -06:00
|
|
|
/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
|
|
|
|
static inline int napi_reschedule(struct napi_struct *napi)
|
|
|
|
{
|
|
|
|
if (napi_schedule_prep(napi)) {
|
|
|
|
__napi_schedule(napi);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* napi_complete - NAPI processing complete
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Mark NAPI processing as complete.
|
|
|
|
*/
|
|
|
|
static inline void __napi_complete(struct napi_struct *n)
|
|
|
|
{
|
|
|
|
BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
|
|
|
|
list_del(&n->poll_list);
|
|
|
|
smp_mb__before_clear_bit();
|
|
|
|
clear_bit(NAPI_STATE_SCHED, &n->state);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void napi_complete(struct napi_struct *n)
|
|
|
|
{
|
2008-03-27 18:42:50 -06:00
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
__napi_complete(n);
|
2008-03-27 18:42:50 -06:00
|
|
|
local_irq_restore(flags);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* napi_disable - prevent NAPI from scheduling
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Stop NAPI from being scheduled on this context.
|
|
|
|
* Waits till any outstanding processing completes.
|
|
|
|
*/
|
|
|
|
static inline void napi_disable(struct napi_struct *n)
|
|
|
|
{
|
2008-01-07 21:35:07 -07:00
|
|
|
set_bit(NAPI_STATE_DISABLE, &n->state);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
|
2007-10-26 05:23:22 -06:00
|
|
|
msleep(1);
|
2008-01-07 21:35:07 -07:00
|
|
|
clear_bit(NAPI_STATE_DISABLE, &n->state);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* napi_enable - enable NAPI scheduling
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Resume NAPI from being scheduled on this context.
|
|
|
|
* Must be paired with napi_disable.
|
|
|
|
*/
|
|
|
|
static inline void napi_enable(struct napi_struct *n)
|
|
|
|
{
|
|
|
|
BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
|
|
|
|
smp_mb__before_clear_bit();
|
|
|
|
clear_bit(NAPI_STATE_SCHED, &n->state);
|
|
|
|
}
|
|
|
|
|
2007-10-17 14:26:41 -06:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
/**
|
|
|
|
* napi_synchronize - wait until NAPI is not running
|
|
|
|
* @n: napi context
|
|
|
|
*
|
|
|
|
* Wait until NAPI is done being scheduled on this context.
|
|
|
|
* Waits till any outstanding processing completes but
|
|
|
|
* does not disable future activations.
|
|
|
|
*/
|
|
|
|
static inline void napi_synchronize(const struct napi_struct *n)
|
|
|
|
{
|
|
|
|
while (test_bit(NAPI_STATE_SCHED, &n->state))
|
|
|
|
msleep(1);
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
# define napi_synchronize(n) barrier()
|
|
|
|
#endif
|
|
|
|
|
2008-07-09 00:14:46 -06:00
|
|
|
enum netdev_queue_state_t
|
|
|
|
{
|
|
|
|
__QUEUE_STATE_XOFF,
|
2008-07-31 17:58:50 -06:00
|
|
|
__QUEUE_STATE_FROZEN,
|
2008-07-09 00:14:46 -06:00
|
|
|
};
|
|
|
|
|
2008-07-08 17:55:56 -06:00
|
|
|
struct netdev_queue {
|
|
|
|
struct net_device *dev;
|
2008-07-08 18:42:10 -06:00
|
|
|
struct Qdisc *qdisc;
|
2008-07-09 00:14:46 -06:00
|
|
|
unsigned long state;
|
2008-07-09 00:13:53 -06:00
|
|
|
spinlock_t _xmit_lock;
|
|
|
|
int xmit_lock_owner;
|
2008-07-08 18:42:10 -06:00
|
|
|
struct Qdisc *qdisc_sleeping;
|
2008-07-17 01:34:19 -06:00
|
|
|
} ____cacheline_aligned_in_smp;
|
2008-07-08 17:55:56 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* The DEVICE structure.
|
|
|
|
* Actually, this whole structure is a big mistake. It mixes I/O
|
|
|
|
* data with strictly "high-level" data, and it has to know about
|
|
|
|
* almost every data structure used in the INET module.
|
|
|
|
*
|
|
|
|
* FIXME: cleanup struct net_device such that network protocol info
|
|
|
|
* moves out.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct net_device
|
|
|
|
{
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the first field of the "visible" part of this structure
|
|
|
|
* (i.e. as seen by users in the "Space.c" file). It is the name
|
|
|
|
* the interface.
|
|
|
|
*/
|
|
|
|
char name[IFNAMSIZ];
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
/* device name hash chain */
|
|
|
|
struct hlist_node name_hlist;
|
2008-09-22 22:28:11 -06:00
|
|
|
/* snmp alias */
|
|
|
|
char *ifalias;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* I/O specific fields
|
|
|
|
* FIXME: Merge these and struct ifmap into one
|
|
|
|
*/
|
|
|
|
unsigned long mem_end; /* shared mem end */
|
|
|
|
unsigned long mem_start; /* shared mem start */
|
|
|
|
unsigned long base_addr; /* device I/O address */
|
|
|
|
unsigned int irq; /* device IRQ number */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Some hardware also needs these fields, but they are not
|
|
|
|
* part of the usual set specified in Space.c.
|
|
|
|
*/
|
|
|
|
|
|
|
|
unsigned char if_port; /* Selectable AUI, TP,..*/
|
|
|
|
unsigned char dma; /* DMA channel */
|
|
|
|
|
|
|
|
unsigned long state;
|
|
|
|
|
2007-05-03 16:13:45 -06:00
|
|
|
struct list_head dev_list;
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
#ifdef CONFIG_NETPOLL
|
|
|
|
struct list_head napi_list;
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* The device initialization function. Called only once. */
|
|
|
|
int (*init)(struct net_device *dev);
|
|
|
|
|
|
|
|
/* ------- Fields preinitialized in Space.c finish here ------- */
|
|
|
|
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
/* Net device features */
|
|
|
|
unsigned long features;
|
|
|
|
#define NETIF_F_SG 1 /* Scatter/gather IO. */
|
2007-06-27 01:47:37 -06:00
|
|
|
#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
|
|
|
|
#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
|
2007-06-27 01:47:37 -06:00
|
|
|
#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
|
|
|
|
#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
|
|
|
|
#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
|
|
|
|
#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
|
|
|
|
#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
|
|
|
|
#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
|
2006-06-22 04:07:29 -06:00
|
|
|
#define NETIF_F_GSO 2048 /* Enable software GSO. */
|
2007-09-25 20:42:02 -06:00
|
|
|
#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
|
|
|
|
/* do not use LLTX in new drivers */
|
2007-09-12 05:53:49 -06:00
|
|
|
#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
|
2007-08-15 17:00:51 -06:00
|
|
|
#define NETIF_F_LRO 32768 /* large receive offload */
|
2006-06-22 03:40:14 -06:00
|
|
|
|
|
|
|
/* Segmentation offload features */
|
2008-05-23 01:22:04 -06:00
|
|
|
#define NETIF_F_GSO_SHIFT 16
|
|
|
|
#define NETIF_F_GSO_MASK 0xffff0000
|
2006-06-22 03:40:14 -06:00
|
|
|
#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
|
2006-06-30 14:37:03 -06:00
|
|
|
#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
|
2006-06-27 14:22:38 -06:00
|
|
|
#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
|
2006-06-30 14:37:03 -06:00
|
|
|
#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
|
|
|
|
#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
|
2006-08-17 19:22:32 -06:00
|
|
|
/* List of features with software fallbacks. */
|
|
|
|
#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
|
|
|
|
|
2007-06-27 01:47:37 -06:00
|
|
|
|
2006-06-17 23:06:05 -06:00
|
|
|
#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
|
2007-06-27 01:47:37 -06:00
|
|
|
#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
|
|
|
|
#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
|
|
|
|
#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
|
2006-06-17 23:06:05 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Interface index. Unique device identifier */
|
|
|
|
int ifindex;
|
|
|
|
int iflink;
|
|
|
|
|
|
|
|
|
|
|
|
struct net_device_stats* (*get_stats)(struct net_device *dev);
|
2007-03-28 15:29:08 -06:00
|
|
|
struct net_device_stats stats;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-04-26 21:48:23 -06:00
|
|
|
#ifdef CONFIG_WIRELESS_EXT
|
2005-04-16 16:20:36 -06:00
|
|
|
/* List of functions to handle Wireless Extensions (instead of ioctl).
|
|
|
|
* See <net/iw_handler.h> for details. Jean II */
|
|
|
|
const struct iw_handler_def * wireless_handlers;
|
|
|
|
/* Instance data managed by the core of Wireless Extensions. */
|
|
|
|
struct iw_public_data * wireless_data;
|
2007-04-26 21:48:23 -06:00
|
|
|
#endif
|
2006-09-08 12:16:13 -06:00
|
|
|
const struct ethtool_ops *ethtool_ops;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-09 02:40:57 -06:00
|
|
|
/* Hardware header description */
|
|
|
|
const struct header_ops *header_ops;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* This marks the end of the "visible" part of the structure. All
|
|
|
|
* fields hereafter are internal to the system, and may change at
|
|
|
|
* will (read: may be cleaned up at will).
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
2006-03-20 18:09:11 -07:00
|
|
|
unsigned int flags; /* interface flags (a la BSD) */
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned short gflags;
|
|
|
|
unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
|
|
|
|
unsigned short padded; /* How much padding added by alloc_netdev() */
|
|
|
|
|
2006-03-20 18:09:11 -07:00
|
|
|
unsigned char operstate; /* RFC2863 operstate */
|
|
|
|
unsigned char link_mode; /* mapping policy to operstate */
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned mtu; /* interface MTU value */
|
|
|
|
unsigned short type; /* interface hardware type */
|
|
|
|
unsigned short hard_header_len; /* hardware hdr length */
|
|
|
|
|
2008-05-12 21:48:31 -06:00
|
|
|
/* extra head- and tailroom the hardware may need, but not in all cases
|
|
|
|
* can this be guaranteed, especially tailroom. Some cases also use
|
|
|
|
* LL_MAX_HEADER instead to allocate the skb.
|
|
|
|
*/
|
|
|
|
unsigned short needed_headroom;
|
|
|
|
unsigned short needed_tailroom;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
struct net_device *master; /* Pointer to master device of a group,
|
|
|
|
* which this device is member of.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Interface address info. */
|
2005-08-20 18:15:54 -06:00
|
|
|
unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned char addr_len; /* hardware address length */
|
|
|
|
unsigned short dev_id; /* for shared network cards */
|
|
|
|
|
2008-07-15 01:08:33 -06:00
|
|
|
spinlock_t addr_list_lock;
|
2007-06-27 02:28:10 -06:00
|
|
|
struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
|
|
|
|
int uc_count; /* Number of installed ucasts */
|
|
|
|
int uc_promisc;
|
2007-06-27 02:26:58 -06:00
|
|
|
struct dev_addr_list *mc_list; /* Multicast mac addresses */
|
2005-04-16 16:20:36 -06:00
|
|
|
int mc_count; /* Number of installed mcasts */
|
2008-06-17 22:12:48 -06:00
|
|
|
unsigned int promiscuity;
|
|
|
|
unsigned int allmulti;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
|
|
|
|
/* Protocol specific pointers */
|
|
|
|
|
net: Distributed Switch Architecture protocol support
Distributed Switch Architecture is a protocol for managing hardware
switch chips. It consists of a set of MII management registers and
commands to configure the switch, and an ethernet header format to
signal which of the ports of the switch a packet was received from
or is intended to be sent to.
The switches that this driver supports are typically embedded in
access points and routers, and a typical setup with a DSA switch
looks something like this:
+-----------+ +-----------+
| | RGMII | |
| +-------+ +------ 1000baseT MDI ("WAN")
| | | 6-port +------ 1000baseT MDI ("LAN1")
| CPU | | ethernet +------ 1000baseT MDI ("LAN2")
| |MIImgmt| switch +------ 1000baseT MDI ("LAN3")
| +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4")
| | | |
+-----------+ +-----------+
The switch driver presents each port on the switch as a separate
network interface to Linux, polls the switch to maintain software
link state of those ports, forwards MII management interface
accesses to those network interfaces (e.g. as done by ethtool) to
the switch, and exposes the switch's hardware statistics counters
via the appropriate Linux kernel interfaces.
This initial patch supports the MII management interface register
layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and
supports the "Ethertype DSA" packet tagging format.
(There is no officially registered ethertype for the Ethertype DSA
packet format, so we just grab a random one. The ethertype to use
is programmed into the switch, and the switch driver uses the value
of ETH_P_EDSA for this, so this define can be changed at any time in
the future if the one we chose is allocated to another protocol or
if Ethertype DSA gets its own officially registered ethertype, and
everything will continue to work.)
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Nicolas Pitre <nico@marvell.com>
Tested-by: Byron Bradley <byron.bbradley@gmail.com>
Tested-by: Tim Ellis <tim.ellis@mac.com>
Tested-by: Peter van Valderen <linux@ddcrew.com>
Tested-by: Dirk Teurlings <dirk@upexia.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 07:44:02 -06:00
|
|
|
#ifdef CONFIG_NET_DSA
|
|
|
|
void *dsa_ptr; /* dsa specific data */
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
void *atalk_ptr; /* AppleTalk link */
|
|
|
|
void *ip_ptr; /* IPv4 specific data */
|
|
|
|
void *dn_ptr; /* DECnet specific data */
|
|
|
|
void *ip6_ptr; /* IPv6 specific data */
|
|
|
|
void *ec_ptr; /* Econet specific data */
|
|
|
|
void *ax25_ptr; /* AX.25 specific data */
|
2007-04-23 13:20:05 -06:00
|
|
|
struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
|
|
|
|
assign before registering */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
/*
|
|
|
|
* Cache line mostly used on receive path (including eth_type_trans())
|
|
|
|
*/
|
|
|
|
unsigned long last_rx; /* Time of last Rx */
|
|
|
|
/* Interface address info used in eth_type_trans() */
|
|
|
|
unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
|
|
|
|
because most packets are unicast) */
|
|
|
|
|
|
|
|
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-07-08 17:55:56 -06:00
|
|
|
struct netdev_queue rx_queue;
|
2008-07-17 01:34:19 -06:00
|
|
|
|
|
|
|
struct netdev_queue *_tx ____cacheline_aligned_in_smp;
|
2008-07-17 02:56:23 -06:00
|
|
|
|
|
|
|
/* Number of TX queues allocated at alloc_netdev_mq() time */
|
2008-07-17 01:34:19 -06:00
|
|
|
unsigned int num_tx_queues;
|
2008-07-17 02:56:23 -06:00
|
|
|
|
|
|
|
/* Number of TX queues currently active in device */
|
|
|
|
unsigned int real_num_tx_queues;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long tx_queue_len; /* Max frames per queue allowed */
|
2008-07-31 17:58:50 -06:00
|
|
|
spinlock_t tx_global_lock;
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
/*
|
|
|
|
* One part is mostly used on xmit path (device)
|
|
|
|
*/
|
|
|
|
void *priv; /* pointer to private data */
|
|
|
|
int (*hard_start_xmit) (struct sk_buff *skb,
|
|
|
|
struct net_device *dev);
|
|
|
|
/* These may be needed for future network-power-down code. */
|
|
|
|
unsigned long trans_start; /* Time (in jiffies) of last Tx */
|
|
|
|
|
|
|
|
int watchdog_timeo; /* used by dev_watchdog() */
|
|
|
|
struct timer_list watchdog_timer;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* refcnt is a very hot point, so align it on SMP
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Number of references to this device */
|
[NET]: Reorder some hot fields of struct net_device
Place them on separate cache lines in SMP to lower memory bouncing
between multiple CPU accessing the device.
- One part is mostly used on receive path (including
eth_type_trans()) (poll_list, poll, quota, weight, last_rx,
dev_addr, broadcast)
- One part is mostly used on queue transmit path (qdisc)
(queue_lock, qdisc, qdisc_sleeping, qdisc_list, tx_queue_len)
- One part is mostly used on xmit path (device)
(xmit_lock, xmit_lock_owner, priv, hard_start_xmit, trans_start)
'features' is placed outside of these hot points, in a location that
may be shared by all cpus (because mostly read)
name_hlist is moved close to name[IFNAMSIZ] to speedup __dev_get_by_name()
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 16:23:16 -06:00
|
|
|
atomic_t refcnt ____cacheline_aligned_in_smp;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* delayed register/unregister */
|
|
|
|
struct list_head todo_list;
|
|
|
|
/* device index hash chain */
|
|
|
|
struct hlist_node index_hlist;
|
|
|
|
|
2007-05-08 19:34:17 -06:00
|
|
|
struct net_device *link_watch_next;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* register/unregister state machine */
|
|
|
|
enum { NETREG_UNINITIALIZED=0,
|
2006-05-10 14:21:17 -06:00
|
|
|
NETREG_REGISTERED, /* completed register_netdevice */
|
2005-04-16 16:20:36 -06:00
|
|
|
NETREG_UNREGISTERING, /* called unregister_netdevice */
|
|
|
|
NETREG_UNREGISTERED, /* completed unregister todo */
|
|
|
|
NETREG_RELEASED, /* called free_netdev */
|
|
|
|
} reg_state;
|
|
|
|
|
|
|
|
/* Called after device is detached from network. */
|
|
|
|
void (*uninit)(struct net_device *dev);
|
|
|
|
/* Called after last user reference disappears. */
|
|
|
|
void (*destructor)(struct net_device *dev);
|
|
|
|
|
|
|
|
/* Pointers to interface service routines. */
|
|
|
|
int (*open)(struct net_device *dev);
|
|
|
|
int (*stop)(struct net_device *dev);
|
|
|
|
#define HAVE_NETDEV_POLL
|
2007-07-14 19:51:31 -06:00
|
|
|
#define HAVE_CHANGE_RX_FLAGS
|
|
|
|
void (*change_rx_flags)(struct net_device *dev,
|
|
|
|
int flags);
|
2007-06-27 02:28:10 -06:00
|
|
|
#define HAVE_SET_RX_MODE
|
|
|
|
void (*set_rx_mode)(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
#define HAVE_MULTICAST
|
|
|
|
void (*set_multicast_list)(struct net_device *dev);
|
|
|
|
#define HAVE_SET_MAC_ADDR
|
|
|
|
int (*set_mac_address)(struct net_device *dev,
|
|
|
|
void *addr);
|
2007-10-23 21:19:37 -06:00
|
|
|
#define HAVE_VALIDATE_ADDR
|
|
|
|
int (*validate_addr)(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
#define HAVE_PRIVATE_IOCTL
|
|
|
|
int (*do_ioctl)(struct net_device *dev,
|
|
|
|
struct ifreq *ifr, int cmd);
|
|
|
|
#define HAVE_SET_CONFIG
|
|
|
|
int (*set_config)(struct net_device *dev,
|
|
|
|
struct ifmap *map);
|
|
|
|
#define HAVE_CHANGE_MTU
|
|
|
|
int (*change_mtu)(struct net_device *dev, int new_mtu);
|
|
|
|
|
|
|
|
#define HAVE_TX_TIMEOUT
|
|
|
|
void (*tx_timeout) (struct net_device *dev);
|
|
|
|
|
|
|
|
void (*vlan_rx_register)(struct net_device *dev,
|
|
|
|
struct vlan_group *grp);
|
|
|
|
void (*vlan_rx_add_vid)(struct net_device *dev,
|
|
|
|
unsigned short vid);
|
|
|
|
void (*vlan_rx_kill_vid)(struct net_device *dev,
|
|
|
|
unsigned short vid);
|
|
|
|
|
|
|
|
int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
|
|
|
|
#ifdef CONFIG_NETPOLL
|
2005-06-22 23:05:31 -06:00
|
|
|
struct netpoll_info *npinfo;
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
|
|
void (*poll_controller)(struct net_device *dev);
|
|
|
|
#endif
|
|
|
|
|
2008-07-15 04:03:33 -06:00
|
|
|
u16 (*select_queue)(struct net_device *dev,
|
|
|
|
struct sk_buff *skb);
|
|
|
|
|
2008-03-25 06:47:49 -06:00
|
|
|
#ifdef CONFIG_NET_NS
|
2007-09-12 03:56:32 -06:00
|
|
|
/* Network namespace this network device is inside */
|
|
|
|
struct net *nd_net;
|
2008-03-25 06:47:49 -06:00
|
|
|
#endif
|
2007-09-12 03:56:32 -06:00
|
|
|
|
2008-05-12 04:29:11 -06:00
|
|
|
/* mid-layer private */
|
|
|
|
void *ml_priv;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* bridge stuff */
|
|
|
|
struct net_bridge_port *br_port;
|
2007-07-14 19:55:06 -06:00
|
|
|
/* macvlan */
|
|
|
|
struct macvlan_port *macvlan_port;
|
2008-07-05 22:26:13 -06:00
|
|
|
/* GARP */
|
|
|
|
struct garp_port *garp_port;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* class/net/name entry */
|
2002-04-09 13:14:34 -06:00
|
|
|
struct device dev;
|
2006-05-06 18:56:03 -06:00
|
|
|
/* space for optional statistics and wireless sysfs groups */
|
|
|
|
struct attribute_group *sysfs_groups[3];
|
2007-06-13 13:03:51 -06:00
|
|
|
|
|
|
|
/* rtnetlink link ops */
|
|
|
|
const struct rtnl_link_ops *rtnl_link_ops;
|
2007-07-06 14:36:20 -06:00
|
|
|
|
2008-05-23 01:22:04 -06:00
|
|
|
/* VLAN feature mask */
|
|
|
|
unsigned long vlan_features;
|
|
|
|
|
[NET]: Add per-connection option to set max TSO frame size
Update: My mailer ate one of Jarek's feedback mails... Fixed the
parameter in netif_set_gso_max_size() to be u32, not u16. Fixed the
whitespace issue due to a patch import botch. Changed the types from
u32 to unsigned int to be more consistent with other variables in the
area. Also brought the patch up to the latest net-2.6.26 tree.
Update: Made gso_max_size container 32 bits, not 16. Moved the
location of gso_max_size within netdev to be less hotpath. Made more
consistent names between the sock and netdev layers, and added a
define for the max GSO size.
Update: Respun for net-2.6.26 tree.
Update: changed max_gso_frame_size and sk_gso_max_size from signed to
unsigned - thanks Stephen!
This patch adds the ability for device drivers to control the size of
the TSO frames being sent to them, per TCP connection. By setting the
netdevice's gso_max_size value, the socket layer will set the GSO
frame size based on that value. This will propogate into the TCP
layer, and send TSO's of that size to the hardware.
This can be desirable to help tune the bursty nature of TSO on a
per-adapter basis, where one may have 1 GbE and 10 GbE devices
coexisting in a system, one running multiqueue and the other not, etc.
This can also be desirable for devices that cannot support full 64 KB
TSO's, but still want to benefit from some level of segmentation
offloading.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-21 04:43:19 -06:00
|
|
|
/* for setting kernel sock attribute on TCP connection setup */
|
|
|
|
#define GSO_MAX_SIZE 65536
|
|
|
|
unsigned int gso_max_size;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
2002-04-09 13:14:34 -06:00
|
|
|
#define to_net_dev(d) container_of(d, struct net_device, dev)
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#define NETDEV_ALIGN 32
|
|
|
|
#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
|
|
|
|
|
2008-07-17 01:34:19 -06:00
|
|
|
static inline
|
|
|
|
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
|
|
|
|
unsigned int index)
|
|
|
|
{
|
|
|
|
return &dev->_tx[index];
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netdev_for_each_tx_queue(struct net_device *dev,
|
|
|
|
void (*f)(struct net_device *,
|
|
|
|
struct netdev_queue *,
|
|
|
|
void *),
|
|
|
|
void *arg)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
|
|
f(dev, &dev->_tx[i], arg);
|
|
|
|
}
|
|
|
|
|
2008-03-25 06:47:49 -06:00
|
|
|
/*
|
|
|
|
* Net namespace inlines
|
|
|
|
*/
|
|
|
|
static inline
|
|
|
|
struct net *dev_net(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_NET_NS
|
|
|
|
return dev->nd_net;
|
|
|
|
#else
|
|
|
|
return &init_net;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline
|
2008-03-26 01:48:17 -06:00
|
|
|
void dev_net_set(struct net_device *dev, struct net *net)
|
2008-03-25 06:47:49 -06:00
|
|
|
{
|
|
|
|
#ifdef CONFIG_NET_NS
|
2008-04-16 03:02:18 -06:00
|
|
|
release_net(dev->nd_net);
|
|
|
|
dev->nd_net = hold_net(net);
|
2008-03-25 06:47:49 -06:00
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2008-10-07 07:45:02 -06:00
|
|
|
static inline bool netdev_uses_dsa_tags(struct net_device *dev)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_NET_DSA_TAG_DSA
|
|
|
|
if (dev->dsa_ptr != NULL)
|
|
|
|
return dsa_uses_dsa_tags(dev->dsa_ptr);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-10-07 07:46:07 -06:00
|
|
|
static inline bool netdev_uses_trailer_tags(struct net_device *dev)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_NET_DSA_TAG_TRAILER
|
|
|
|
if (dev->dsa_ptr != NULL)
|
|
|
|
return dsa_uses_trailer_tags(dev->dsa_ptr);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netdev_priv - access network device private data
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Get network device private data
|
|
|
|
*/
|
2007-06-13 13:03:21 -06:00
|
|
|
static inline void *netdev_priv(const struct net_device *dev)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-07-15 03:58:39 -06:00
|
|
|
return (char *)dev + ((sizeof(struct net_device)
|
|
|
|
+ NETDEV_ALIGN_CONST)
|
|
|
|
& ~NETDEV_ALIGN_CONST);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Set the sysfs physical device reference for the network logical device
|
|
|
|
* if set prior to registration will cause a symlink during initialization.
|
|
|
|
*/
|
2002-04-09 13:14:34 -06:00
|
|
|
#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-11-01 03:21:47 -06:00
|
|
|
/**
|
|
|
|
* netif_napi_add - initialize a napi context
|
|
|
|
* @dev: network device
|
|
|
|
* @napi: napi context
|
|
|
|
* @poll: polling function
|
|
|
|
* @weight: default weight
|
|
|
|
*
|
|
|
|
* netif_napi_add() must be used to initialize a napi context prior to calling
|
|
|
|
* *any* of the other napi related functions.
|
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline void netif_napi_add(struct net_device *dev,
|
|
|
|
struct napi_struct *napi,
|
|
|
|
int (*poll)(struct napi_struct *, int),
|
|
|
|
int weight)
|
|
|
|
{
|
|
|
|
INIT_LIST_HEAD(&napi->poll_list);
|
|
|
|
napi->poll = poll;
|
|
|
|
napi->weight = weight;
|
|
|
|
#ifdef CONFIG_NETPOLL
|
|
|
|
napi->dev = dev;
|
|
|
|
list_add(&napi->dev_list, &dev->napi_list);
|
|
|
|
spin_lock_init(&napi->poll_lock);
|
|
|
|
napi->poll_owner = -1;
|
|
|
|
#endif
|
|
|
|
set_bit(NAPI_STATE_SCHED, &napi->state);
|
|
|
|
}
|
|
|
|
|
2008-07-08 16:13:05 -06:00
|
|
|
/**
|
|
|
|
* netif_napi_del - remove a napi context
|
|
|
|
* @napi: napi context
|
|
|
|
*
|
|
|
|
* netif_napi_del() removes a napi context from the network device napi list
|
|
|
|
*/
|
|
|
|
static inline void netif_napi_del(struct napi_struct *napi)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_NETPOLL
|
|
|
|
list_del(&napi->dev_list);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
struct packet_type {
|
2005-08-09 20:34:12 -06:00
|
|
|
__be16 type; /* This is really htons(ether_type). */
|
|
|
|
struct net_device *dev; /* NULL is wildcarded here */
|
|
|
|
int (*func) (struct sk_buff *,
|
|
|
|
struct net_device *,
|
|
|
|
struct packet_type *,
|
|
|
|
struct net_device *);
|
2006-06-27 14:22:38 -06:00
|
|
|
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
|
|
|
|
int features);
|
2006-07-08 14:34:56 -06:00
|
|
|
int (*gso_send_check)(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
void *af_packet_priv;
|
|
|
|
struct list_head list;
|
|
|
|
};
|
|
|
|
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/notifier.h>
|
|
|
|
|
|
|
|
extern rwlock_t dev_base_lock; /* Device list lock */
|
|
|
|
|
2007-05-03 16:13:45 -06:00
|
|
|
|
2007-09-17 12:56:21 -06:00
|
|
|
#define for_each_netdev(net, d) \
|
|
|
|
list_for_each_entry(d, &(net)->dev_base_head, dev_list)
|
|
|
|
#define for_each_netdev_safe(net, d, n) \
|
|
|
|
list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
|
|
|
|
#define for_each_netdev_continue(net, d) \
|
|
|
|
list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
|
|
|
|
#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
|
2007-05-03 16:13:45 -06:00
|
|
|
|
2007-09-12 06:57:09 -06:00
|
|
|
static inline struct net_device *next_net_device(struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct list_head *lh;
|
|
|
|
struct net *net;
|
|
|
|
|
2008-03-25 06:47:49 -06:00
|
|
|
net = dev_net(dev);
|
2007-09-12 06:57:09 -06:00
|
|
|
lh = dev->dev_list.next;
|
|
|
|
return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct net_device *first_net_device(struct net *net)
|
|
|
|
{
|
|
|
|
return list_empty(&net->dev_base_head) ? NULL :
|
|
|
|
net_device_entry(net->dev_base_head.next);
|
|
|
|
}
|
2007-05-03 16:13:45 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int netdev_boot_setup_check(struct net_device *dev);
|
|
|
|
extern unsigned long netdev_boot_base(const char *prefix, int unit);
|
2007-09-17 12:56:21 -06:00
|
|
|
extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
|
|
|
|
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
|
|
|
|
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void dev_add_pack(struct packet_type *pt);
|
|
|
|
extern void dev_remove_pack(struct packet_type *pt);
|
|
|
|
extern void __dev_remove_pack(struct packet_type *pt);
|
|
|
|
|
2007-09-17 12:56:21 -06:00
|
|
|
extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned short mask);
|
2007-09-17 12:56:21 -06:00
|
|
|
extern struct net_device *dev_get_by_name(struct net *net, const char *name);
|
|
|
|
extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int dev_alloc_name(struct net_device *dev, const char *name);
|
|
|
|
extern int dev_open(struct net_device *dev);
|
|
|
|
extern int dev_close(struct net_device *dev);
|
2008-06-19 17:15:47 -06:00
|
|
|
extern void dev_disable_lro(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int dev_queue_xmit(struct sk_buff *skb);
|
|
|
|
extern int register_netdevice(struct net_device *dev);
|
2007-02-07 01:09:58 -07:00
|
|
|
extern void unregister_netdevice(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void free_netdev(struct net_device *dev);
|
|
|
|
extern void synchronize_net(void);
|
|
|
|
extern int register_netdevice_notifier(struct notifier_block *nb);
|
|
|
|
extern int unregister_netdevice_notifier(struct notifier_block *nb);
|
2007-09-16 16:33:32 -06:00
|
|
|
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
|
2007-09-17 12:56:21 -06:00
|
|
|
extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
|
|
|
|
extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int dev_restart(struct net_device *dev);
|
|
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
|
|
extern int netpoll_trap(void);
|
|
|
|
#endif
|
|
|
|
|
2007-10-09 02:36:32 -06:00
|
|
|
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
unsigned short type,
|
2007-10-09 02:40:57 -06:00
|
|
|
const void *daddr, const void *saddr,
|
|
|
|
unsigned len)
|
2007-10-09 02:36:32 -06:00
|
|
|
{
|
2007-10-22 08:16:14 -06:00
|
|
|
if (!dev->header_ops || !dev->header_ops->create)
|
2007-10-09 02:36:32 -06:00
|
|
|
return 0;
|
2007-10-09 02:40:57 -06:00
|
|
|
|
|
|
|
return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
|
2007-10-09 02:36:32 -06:00
|
|
|
}
|
|
|
|
|
2007-09-26 23:13:38 -06:00
|
|
|
static inline int dev_parse_header(const struct sk_buff *skb,
|
|
|
|
unsigned char *haddr)
|
|
|
|
{
|
|
|
|
const struct net_device *dev = skb->dev;
|
|
|
|
|
2007-10-18 06:09:28 -06:00
|
|
|
if (!dev->header_ops || !dev->header_ops->parse)
|
2007-09-26 23:13:38 -06:00
|
|
|
return 0;
|
2007-10-09 02:40:57 -06:00
|
|
|
return dev->header_ops->parse(skb, haddr);
|
2007-09-26 23:13:38 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
|
|
|
|
extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
|
|
|
|
static inline int unregister_gifconf(unsigned int family)
|
|
|
|
{
|
|
|
|
return register_gifconf(family, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Incoming packets are placed on per-cpu queues so that
|
|
|
|
* no locking is needed.
|
|
|
|
*/
|
|
|
|
struct softnet_data
|
|
|
|
{
|
2008-07-16 03:15:04 -06:00
|
|
|
struct Qdisc *output_queue;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct sk_buff_head input_pkt_queue;
|
|
|
|
struct list_head poll_list;
|
|
|
|
struct sk_buff *completion_queue;
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
struct napi_struct backlog;
|
2006-06-17 22:24:58 -06:00
|
|
|
#ifdef CONFIG_NET_DMA
|
|
|
|
struct dma_chan *net_dma;
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
DECLARE_PER_CPU(struct softnet_data,softnet_data);
|
|
|
|
|
|
|
|
#define HAVE_NETIF_QUEUE
|
|
|
|
|
2008-07-16 03:15:04 -06:00
|
|
|
extern void __netif_schedule(struct Qdisc *q);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-07-09 00:11:25 -06:00
|
|
|
static inline void netif_schedule_queue(struct netdev_queue *txq)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-07-09 00:14:46 -06:00
|
|
|
if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
|
2008-07-16 03:15:04 -06:00
|
|
|
__netif_schedule(txq->qdisc);
|
2008-07-09 00:11:25 -06:00
|
|
|
}
|
|
|
|
|
2008-07-17 02:56:23 -06:00
|
|
|
static inline void netif_tx_schedule_all(struct net_device *dev)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++)
|
|
|
|
netif_schedule_queue(netdev_get_tx_queue(dev, i));
|
|
|
|
}
|
|
|
|
|
2008-07-22 15:09:06 -06:00
|
|
|
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
|
|
|
|
{
|
|
|
|
clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_start_queue - allow transmit
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Allow upper layers to call the device hard_start_xmit routine.
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline void netif_start_queue(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-07-17 02:56:23 -06:00
|
|
|
static inline void netif_tx_start_all_queues(struct net_device *dev)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
|
|
netif_tx_start_queue(txq);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-09 00:14:46 -06:00
|
|
|
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
2007-04-28 21:57:37 -06:00
|
|
|
if (netpoll_trap()) {
|
2008-07-09 00:14:46 -06:00
|
|
|
clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
|
2005-04-16 16:20:36 -06:00
|
|
|
return;
|
2007-04-28 21:57:37 -06:00
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
2008-07-09 00:14:46 -06:00
|
|
|
if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
|
2008-07-16 03:15:04 -06:00
|
|
|
__netif_schedule(dev_queue->qdisc);
|
2008-07-09 00:14:46 -06:00
|
|
|
}
|
|
|
|
|
2008-07-22 15:09:06 -06:00
|
|
|
/**
|
|
|
|
* netif_wake_queue - restart transmit
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Allow upper layers to call the device hard_start_xmit routine.
|
|
|
|
* Used for flow control when transmit resources are available.
|
|
|
|
*/
|
2008-07-09 00:14:46 -06:00
|
|
|
static inline void netif_wake_queue(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-07-17 02:56:23 -06:00
|
|
|
static inline void netif_tx_wake_all_queues(struct net_device *dev)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
|
|
netif_tx_wake_queue(txq);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-22 15:09:06 -06:00
|
|
|
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
|
|
|
|
{
|
|
|
|
set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_stop_queue - stop transmitted packets
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Stop upper layers calling the device hard_start_xmit routine.
|
|
|
|
* Used for flow control when transmit resources are unavailable.
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline void netif_stop_queue(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-07-17 02:56:23 -06:00
|
|
|
static inline void netif_tx_stop_all_queues(struct net_device *dev)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
|
|
|
netif_tx_stop_queue(txq);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-22 15:09:06 -06:00
|
|
|
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
|
|
|
|
{
|
|
|
|
return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_queue_stopped - test if transmit queue is flowblocked
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Test if transmit queue on device is currently unable to send.
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline int netif_queue_stopped(const struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-07-31 17:58:50 -06:00
|
|
|
static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
|
|
|
|
{
|
|
|
|
return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_running - test if up
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Test if the device has been brought up.
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline int netif_running(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
return test_bit(__LINK_STATE_START, &dev->state);
|
|
|
|
}
|
|
|
|
|
2007-07-06 14:36:20 -06:00
|
|
|
/*
|
|
|
|
* Routines to manage the subqueues on a device. We only need start
|
|
|
|
* stop, and a check if it's stopped. All other device management is
|
|
|
|
* done at the overall netdevice level.
|
|
|
|
* Also test the device if we're multiqueue.
|
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
|
|
|
|
/**
|
|
|
|
* netif_start_subqueue - allow sending packets on subqueue
|
|
|
|
* @dev: network device
|
|
|
|
* @queue_index: sub queue index
|
|
|
|
*
|
|
|
|
* Start individual transmit queue of a device with multiple transmit queues.
|
|
|
|
*/
|
2007-07-06 14:36:20 -06:00
|
|
|
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
|
|
|
|
{
|
2008-07-17 02:56:23 -06:00
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
|
|
|
|
clear_bit(__QUEUE_STATE_XOFF, &txq->state);
|
2007-07-06 14:36:20 -06:00
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_stop_subqueue - stop sending packets on subqueue
|
|
|
|
* @dev: network device
|
|
|
|
* @queue_index: sub queue index
|
|
|
|
*
|
|
|
|
* Stop individual transmit queue of a device with multiple transmit queues.
|
|
|
|
*/
|
2007-07-06 14:36:20 -06:00
|
|
|
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
|
|
|
|
{
|
2008-07-17 02:56:23 -06:00
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
|
2007-07-06 14:36:20 -06:00
|
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
|
|
if (netpoll_trap())
|
|
|
|
return;
|
|
|
|
#endif
|
2008-07-17 02:56:23 -06:00
|
|
|
set_bit(__QUEUE_STATE_XOFF, &txq->state);
|
2007-07-06 14:36:20 -06:00
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_subqueue_stopped - test status of subqueue
|
|
|
|
* @dev: network device
|
|
|
|
* @queue_index: sub queue index
|
|
|
|
*
|
|
|
|
* Check individual transmit queue of a device with multiple transmit queues.
|
|
|
|
*/
|
2007-10-21 18:01:56 -06:00
|
|
|
static inline int __netif_subqueue_stopped(const struct net_device *dev,
|
2007-07-06 14:36:20 -06:00
|
|
|
u16 queue_index)
|
|
|
|
{
|
2008-07-17 02:56:23 -06:00
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
|
|
|
|
return test_bit(__QUEUE_STATE_XOFF, &txq->state);
|
2007-07-06 14:36:20 -06:00
|
|
|
}
|
|
|
|
|
2007-10-21 18:01:56 -06:00
|
|
|
static inline int netif_subqueue_stopped(const struct net_device *dev,
|
|
|
|
struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
|
|
|
|
}
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
|
|
|
|
/**
|
|
|
|
* netif_wake_subqueue - allow sending packets on subqueue
|
|
|
|
* @dev: network device
|
|
|
|
* @queue_index: sub queue index
|
|
|
|
*
|
|
|
|
* Resume individual transmit queue of a device with multiple transmit queues.
|
|
|
|
*/
|
2007-07-06 14:36:20 -06:00
|
|
|
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
|
|
|
|
{
|
2008-07-17 02:56:23 -06:00
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
|
2007-07-06 14:36:20 -06:00
|
|
|
#ifdef CONFIG_NETPOLL_TRAP
|
|
|
|
if (netpoll_trap())
|
|
|
|
return;
|
|
|
|
#endif
|
2008-07-17 02:56:23 -06:00
|
|
|
if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
|
2008-07-16 03:15:04 -06:00
|
|
|
__netif_schedule(txq->qdisc);
|
2007-07-06 14:36:20 -06:00
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_is_multiqueue - test if device has multiple transmit queues
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Check if device has multiple transmit queues
|
|
|
|
*/
|
2007-07-06 14:36:20 -06:00
|
|
|
static inline int netif_is_multiqueue(const struct net_device *dev)
|
|
|
|
{
|
2008-07-17 02:52:12 -06:00
|
|
|
return (dev->num_tx_queues > 1);
|
2007-07-06 14:36:20 -06:00
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Use this variant when it is known for sure that it
|
2008-03-28 17:33:00 -06:00
|
|
|
* is executing from hardware interrupt context or with hardware interrupts
|
|
|
|
* disabled.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
extern void dev_kfree_skb_irq(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Use this variant in places where it could be invoked
|
2008-03-28 17:33:00 -06:00
|
|
|
* from either hardware interrupt or other context, with hardware interrupts
|
|
|
|
* either disabled or enabled.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2006-03-29 16:57:29 -07:00
|
|
|
extern void dev_kfree_skb_any(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#define HAVE_NETIF_RX 1
|
|
|
|
extern int netif_rx(struct sk_buff *skb);
|
|
|
|
extern int netif_rx_ni(struct sk_buff *skb);
|
|
|
|
#define HAVE_NETIF_RECEIVE_SKB 1
|
|
|
|
extern int netif_receive_skb(struct sk_buff *skb);
|
2008-07-14 23:49:30 -06:00
|
|
|
extern void netif_nit_deliver(struct sk_buff *skb);
|
2005-11-09 11:34:45 -07:00
|
|
|
extern int dev_valid_name(const char *name);
|
2007-09-17 12:56:21 -06:00
|
|
|
extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
|
|
|
|
extern int dev_ethtool(struct net *net, struct ifreq *);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern unsigned dev_get_flags(const struct net_device *);
|
|
|
|
extern int dev_change_flags(struct net_device *, unsigned);
|
2008-09-30 03:22:14 -06:00
|
|
|
extern int dev_change_name(struct net_device *, const char *);
|
2008-09-22 22:28:11 -06:00
|
|
|
extern int dev_set_alias(struct net_device *, const char *, size_t);
|
2007-09-12 05:53:49 -06:00
|
|
|
extern int dev_change_net_namespace(struct net_device *,
|
|
|
|
struct net *, const char *);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int dev_set_mtu(struct net_device *, int);
|
|
|
|
extern int dev_set_mac_address(struct net_device *,
|
|
|
|
struct sockaddr *);
|
2006-06-22 03:57:17 -06:00
|
|
|
extern int dev_hard_start_xmit(struct sk_buff *skb,
|
2008-07-17 02:56:23 -06:00
|
|
|
struct net_device *dev,
|
|
|
|
struct netdev_queue *txq);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-15 23:18:02 -06:00
|
|
|
extern int netdev_budget;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Called by rtnetlink.c:rtnl_unlock() */
|
|
|
|
extern void netdev_run_todo(void);
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* dev_put - release reference to device
|
|
|
|
* @dev: network device
|
|
|
|
*
|
2007-10-10 22:18:17 -06:00
|
|
|
* Release reference to device to allow it to be freed.
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline void dev_put(struct net_device *dev)
|
|
|
|
{
|
|
|
|
atomic_dec(&dev->refcnt);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* dev_hold - get reference to device
|
|
|
|
* @dev: network device
|
|
|
|
*
|
2007-10-10 22:18:17 -06:00
|
|
|
* Hold reference to device to keep it from being freed.
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
*/
|
2006-03-20 23:32:28 -07:00
|
|
|
static inline void dev_hold(struct net_device *dev)
|
|
|
|
{
|
|
|
|
atomic_inc(&dev->refcnt);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Carrier loss detection, dial on demand. The functions netif_carrier_on
|
|
|
|
* and _off may be called from IRQ context, but it is caller
|
|
|
|
* who is responsible for serialization of these calls.
|
2006-03-20 18:09:11 -07:00
|
|
|
*
|
|
|
|
* The name carrier is inappropriate, these functions should really be
|
|
|
|
* called netif_lowerlayer_*() because they represent the state of any
|
|
|
|
* kind of lower layer not just hardware media.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
|
|
|
|
extern void linkwatch_fire_event(struct net_device *dev);
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_carrier_ok - test if carrier present
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Check if carrier is present on device
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline int netif_carrier_ok(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
|
|
|
|
}
|
|
|
|
|
|
|
|
extern void __netdev_watchdog_up(struct net_device *dev);
|
|
|
|
|
2005-08-11 16:32:53 -06:00
|
|
|
extern void netif_carrier_on(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-11 16:32:53 -06:00
|
|
|
extern void netif_carrier_off(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_dormant_on - mark device as dormant.
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Mark device as dormant (as per RFC2863).
|
|
|
|
*
|
|
|
|
* The dormant state indicates that the relevant interface is not
|
|
|
|
* actually in a condition to pass packets (i.e., it is not 'up') but is
|
|
|
|
* in a "pending" state, waiting for some external event. For "on-
|
|
|
|
* demand" interfaces, this new state identifies the situation where the
|
|
|
|
* interface is waiting for events to place it in the up state.
|
|
|
|
*
|
|
|
|
*/
|
2006-03-20 18:09:11 -07:00
|
|
|
static inline void netif_dormant_on(struct net_device *dev)
|
|
|
|
{
|
|
|
|
if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
|
|
linkwatch_fire_event(dev);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_dormant_off - set device as not dormant.
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Device is not in dormant state.
|
|
|
|
*/
|
2006-03-20 18:09:11 -07:00
|
|
|
static inline void netif_dormant_off(struct net_device *dev)
|
|
|
|
{
|
|
|
|
if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
|
|
|
|
linkwatch_fire_event(dev);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_dormant - test if carrier present
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Check if carrier is present on device
|
|
|
|
*/
|
2006-03-20 18:09:11 -07:00
|
|
|
static inline int netif_dormant(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
return test_bit(__LINK_STATE_DORMANT, &dev->state);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_oper_up - test if device is operational
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Check if carrier is operational
|
|
|
|
*/
|
2006-03-20 18:09:11 -07:00
|
|
|
static inline int netif_oper_up(const struct net_device *dev) {
|
|
|
|
return (dev->operstate == IF_OPER_UP ||
|
|
|
|
dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
|
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/**
|
|
|
|
* netif_device_present - is device available or removed
|
|
|
|
* @dev: network device
|
|
|
|
*
|
|
|
|
* Check if device has not been removed from system.
|
|
|
|
*/
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline int netif_device_present(struct net_device *dev)
|
|
|
|
{
|
|
|
|
return test_bit(__LINK_STATE_PRESENT, &dev->state);
|
|
|
|
}
|
|
|
|
|
2006-03-29 16:57:29 -07:00
|
|
|
extern void netif_device_detach(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-03-29 16:57:29 -07:00
|
|
|
extern void netif_device_attach(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Network interface message level settings
|
|
|
|
*/
|
|
|
|
#define HAVE_NETIF_MSG 1
|
|
|
|
|
|
|
|
enum {
|
|
|
|
NETIF_MSG_DRV = 0x0001,
|
|
|
|
NETIF_MSG_PROBE = 0x0002,
|
|
|
|
NETIF_MSG_LINK = 0x0004,
|
|
|
|
NETIF_MSG_TIMER = 0x0008,
|
|
|
|
NETIF_MSG_IFDOWN = 0x0010,
|
|
|
|
NETIF_MSG_IFUP = 0x0020,
|
|
|
|
NETIF_MSG_RX_ERR = 0x0040,
|
|
|
|
NETIF_MSG_TX_ERR = 0x0080,
|
|
|
|
NETIF_MSG_TX_QUEUED = 0x0100,
|
|
|
|
NETIF_MSG_INTR = 0x0200,
|
|
|
|
NETIF_MSG_TX_DONE = 0x0400,
|
|
|
|
NETIF_MSG_RX_STATUS = 0x0800,
|
|
|
|
NETIF_MSG_PKTDATA = 0x1000,
|
|
|
|
NETIF_MSG_HW = 0x2000,
|
|
|
|
NETIF_MSG_WOL = 0x4000,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
|
|
|
|
#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
|
|
|
|
#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
|
|
|
|
#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
|
|
|
|
#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
|
|
|
|
#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
|
|
|
|
#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
|
|
|
|
#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
|
|
|
|
#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
|
|
|
|
#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
|
|
|
|
#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
|
|
|
|
#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
|
|
|
|
#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
|
|
|
|
#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
|
|
|
|
#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
|
|
|
|
|
|
|
|
static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
|
|
|
|
{
|
|
|
|
/* use default */
|
|
|
|
if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
|
|
|
|
return default_msg_enable_bits;
|
|
|
|
if (debug_value == 0) /* no output */
|
|
|
|
return 0;
|
|
|
|
/* set low N bits */
|
|
|
|
return (1 << debug_value) - 1;
|
|
|
|
}
|
|
|
|
|
2005-11-30 12:45:17 -07:00
|
|
|
/* Test if receive needs to be scheduled but only if up */
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline int netif_rx_schedule_prep(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2008-01-07 21:35:07 -07:00
|
|
|
return napi_schedule_prep(napi);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Add interface to tail of rx poll list. This assumes that _prep has
|
|
|
|
* already been called and returned 1.
|
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline void __netif_rx_schedule(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
|
|
|
{
|
|
|
|
__napi_schedule(napi);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Try to reschedule poll. Called by irq handler. */
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline void netif_rx_schedule(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
if (netif_rx_schedule_prep(dev, napi))
|
|
|
|
__netif_rx_schedule(dev, napi);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
|
|
|
|
static inline int netif_rx_reschedule(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
if (napi_schedule_prep(napi)) {
|
|
|
|
__netif_rx_schedule(dev, napi);
|
2005-04-16 16:20:36 -06:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-05-29 14:22:52 -06:00
|
|
|
/* same as netif_rx_complete, except that local_irq_save(flags)
|
|
|
|
* has already been issued
|
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline void __netif_rx_complete(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
2007-05-29 14:22:52 -06:00
|
|
|
{
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
__napi_complete(napi);
|
2007-05-29 14:22:52 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Remove interface from poll list: it must be in the poll list
|
|
|
|
* on current cpu. This primitive is called by dev->poll(), when
|
|
|
|
* it completes the work. The device cannot be out of poll list at this
|
|
|
|
* moment, it is BUG().
|
|
|
|
*/
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
static inline void netif_rx_complete(struct net_device *dev,
|
|
|
|
struct napi_struct *napi)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
[NET]: Make NAPI polling independent of struct net_device objects.
Several devices have multiple independant RX queues per net
device, and some have a single interrupt doorbell for several
queues.
In either case, it's easier to support layouts like that if the
structure representing the poll is independant from the net
device itself.
The signature of the ->poll() call back goes from:
int foo_poll(struct net_device *dev, int *budget)
to
int foo_poll(struct napi_struct *napi, int budget)
The caller is returned the number of RX packets processed (or
the number of "NAPI credits" consumed if you want to get
abstract). The callee no longer messes around bumping
dev->quota, *budget, etc. because that is all handled in the
caller upon return.
The napi_struct is to be embedded in the device driver private data
structures.
Furthermore, it is the driver's responsibility to disable all NAPI
instances in it's ->stop() device close handler. Since the
napi_struct is privatized into the driver's private data structures,
only the driver knows how to get at all of the napi_struct instances
it may have per-device.
With lots of help and suggestions from Rusty Russell, Roland Dreier,
Michael Chan, Jeff Garzik, and Jamal Hadi Salim.
Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra,
Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan.
[ Ported to current tree and all drivers converted. Integrated
Stephen's follow-on kerneldoc additions, and restored poll_list
handling to the old style to fix mutual exclusion issues. -DaveM ]
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-03 17:41:36 -06:00
|
|
|
__netif_rx_complete(dev, napi);
|
2005-04-16 16:20:36 -06:00
|
|
|
local_irq_restore(flags);
|
|
|
|
}
|
|
|
|
|
2008-07-09 00:13:53 -06:00
|
|
|
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
|
2006-06-09 13:20:56 -06:00
|
|
|
{
|
2008-07-09 00:13:53 -06:00
|
|
|
spin_lock(&txq->_xmit_lock);
|
|
|
|
txq->xmit_lock_owner = cpu;
|
2007-09-16 15:40:49 -06:00
|
|
|
}
|
|
|
|
|
2008-07-17 02:56:23 -06:00
|
|
|
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
|
|
|
|
{
|
|
|
|
spin_lock_bh(&txq->_xmit_lock);
|
|
|
|
txq->xmit_lock_owner = smp_processor_id();
|
|
|
|
}
|
|
|
|
|
2008-07-31 17:58:50 -06:00
|
|
|
static inline int __netif_tx_trylock(struct netdev_queue *txq)
|
|
|
|
{
|
|
|
|
int ok = spin_trylock(&txq->_xmit_lock);
|
|
|
|
if (likely(ok))
|
|
|
|
txq->xmit_lock_owner = smp_processor_id();
|
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void __netif_tx_unlock(struct netdev_queue *txq)
|
|
|
|
{
|
|
|
|
txq->xmit_lock_owner = -1;
|
|
|
|
spin_unlock(&txq->_xmit_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
|
|
|
|
{
|
|
|
|
txq->xmit_lock_owner = -1;
|
|
|
|
spin_unlock_bh(&txq->_xmit_lock);
|
|
|
|
}
|
|
|
|
|
2008-07-22 15:09:06 -06:00
|
|
|
/**
|
|
|
|
* netif_tx_lock - grab network device transmit lock
|
|
|
|
* @dev: network device
|
|
|
|
* @cpu: cpu number of lock owner
|
|
|
|
*
|
|
|
|
* Get network device transmit lock
|
|
|
|
*/
|
2007-09-16 15:40:49 -06:00
|
|
|
static inline void netif_tx_lock(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
unsigned int i;
|
2008-07-31 17:58:50 -06:00
|
|
|
int cpu;
|
2008-07-09 00:13:53 -06:00
|
|
|
|
2008-07-31 17:58:50 -06:00
|
|
|
spin_lock(&dev->tx_global_lock);
|
|
|
|
cpu = smp_processor_id();
|
2008-07-17 01:34:19 -06:00
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
2008-07-31 17:58:50 -06:00
|
|
|
|
|
|
|
/* We are the only thread of execution doing a
|
|
|
|
* freeze, but we have to grab the _xmit_lock in
|
|
|
|
* order to synchronize with threads which are in
|
|
|
|
* the ->hard_start_xmit() handler and already
|
|
|
|
* checked the frozen bit.
|
|
|
|
*/
|
2008-07-17 01:34:19 -06:00
|
|
|
__netif_tx_lock(txq, cpu);
|
2008-07-31 17:58:50 -06:00
|
|
|
set_bit(__QUEUE_STATE_FROZEN, &txq->state);
|
|
|
|
__netif_tx_unlock(txq);
|
2008-07-17 01:34:19 -06:00
|
|
|
}
|
2006-06-09 13:20:56 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_tx_lock_bh(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
local_bh_disable();
|
|
|
|
netif_tx_lock(dev);
|
2006-06-09 13:20:56 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_tx_unlock(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
2008-07-09 00:13:53 -06:00
|
|
|
|
2008-07-31 17:58:50 -06:00
|
|
|
/* No need to grab the _xmit_lock here. If the
|
|
|
|
* queue is not stopped for another reason, we
|
|
|
|
* force a schedule.
|
|
|
|
*/
|
|
|
|
clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
|
|
|
|
if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
|
|
|
|
__netif_schedule(txq->qdisc);
|
|
|
|
}
|
|
|
|
spin_unlock(&dev->tx_global_lock);
|
2006-06-09 13:20:56 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_tx_unlock_bh(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 01:34:19 -06:00
|
|
|
netif_tx_unlock(dev);
|
|
|
|
local_bh_enable();
|
2006-06-09 13:20:56 -06:00
|
|
|
}
|
|
|
|
|
2008-07-09 00:13:53 -06:00
|
|
|
#define HARD_TX_LOCK(dev, txq, cpu) { \
|
2007-09-16 15:40:49 -06:00
|
|
|
if ((dev->features & NETIF_F_LLTX) == 0) { \
|
2008-07-09 00:13:53 -06:00
|
|
|
__netif_tx_lock(txq, cpu); \
|
2007-09-16 15:40:49 -06:00
|
|
|
} \
|
|
|
|
}
|
|
|
|
|
2008-07-09 00:13:53 -06:00
|
|
|
#define HARD_TX_UNLOCK(dev, txq) { \
|
2007-09-16 15:40:49 -06:00
|
|
|
if ((dev->features & NETIF_F_LLTX) == 0) { \
|
2008-07-09 00:13:53 -06:00
|
|
|
__netif_tx_unlock(txq); \
|
2007-09-16 15:40:49 -06:00
|
|
|
} \
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline void netif_tx_disable(struct net_device *dev)
|
|
|
|
{
|
2008-07-17 02:56:23 -06:00
|
|
|
unsigned int i;
|
2008-07-31 17:58:50 -06:00
|
|
|
int cpu;
|
2008-07-17 02:56:23 -06:00
|
|
|
|
2008-07-31 17:58:50 -06:00
|
|
|
local_bh_disable();
|
|
|
|
cpu = smp_processor_id();
|
2008-07-17 02:56:23 -06:00
|
|
|
for (i = 0; i < dev->num_tx_queues; i++) {
|
|
|
|
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
|
2008-07-31 17:58:50 -06:00
|
|
|
|
|
|
|
__netif_tx_lock(txq, cpu);
|
2008-07-17 02:56:23 -06:00
|
|
|
netif_tx_stop_queue(txq);
|
2008-07-31 17:58:50 -06:00
|
|
|
__netif_tx_unlock(txq);
|
2008-07-17 02:56:23 -06:00
|
|
|
}
|
2008-07-31 17:58:50 -06:00
|
|
|
local_bh_enable();
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-07-15 01:13:44 -06:00
|
|
|
static inline void netif_addr_lock(struct net_device *dev)
|
|
|
|
{
|
|
|
|
spin_lock(&dev->addr_list_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_addr_lock_bh(struct net_device *dev)
|
|
|
|
{
|
|
|
|
spin_lock_bh(&dev->addr_list_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_addr_unlock(struct net_device *dev)
|
|
|
|
{
|
|
|
|
spin_unlock(&dev->addr_list_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void netif_addr_unlock_bh(struct net_device *dev)
|
|
|
|
{
|
|
|
|
spin_unlock_bh(&dev->addr_list_lock);
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* These functions live elsewhere (drivers/net/net_init.c, but related) */
|
|
|
|
|
|
|
|
extern void ether_setup(struct net_device *dev);
|
|
|
|
|
|
|
|
/* Support for loadable net-drivers */
|
2007-07-06 14:36:20 -06:00
|
|
|
extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
|
|
|
|
void (*setup)(struct net_device *),
|
|
|
|
unsigned int queue_count);
|
|
|
|
#define alloc_netdev(sizeof_priv, name, setup) \
|
|
|
|
alloc_netdev_mq(sizeof_priv, name, setup, 1)
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int register_netdev(struct net_device *dev);
|
|
|
|
extern void unregister_netdev(struct net_device *dev);
|
2007-06-27 02:28:10 -06:00
|
|
|
/* Functions used for secondary unicast and multicast support */
|
|
|
|
extern void dev_set_rx_mode(struct net_device *dev);
|
|
|
|
extern void __dev_set_rx_mode(struct net_device *dev);
|
|
|
|
extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
|
|
|
|
extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
|
2008-01-31 17:53:23 -07:00
|
|
|
extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
|
|
|
|
extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
|
|
|
|
extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
|
2007-07-14 19:52:02 -06:00
|
|
|
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
|
|
|
|
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
|
2007-06-30 14:35:52 -06:00
|
|
|
extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
|
|
|
|
extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
|
2008-01-31 17:53:23 -07:00
|
|
|
extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
|
|
|
|
extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
|
2008-06-18 02:48:28 -06:00
|
|
|
extern int dev_set_promiscuity(struct net_device *dev, int inc);
|
|
|
|
extern int dev_set_allmulti(struct net_device *dev, int inc);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void netdev_state_change(struct net_device *dev);
|
2008-06-13 19:12:00 -06:00
|
|
|
extern void netdev_bonding_change(struct net_device *dev);
|
2005-05-29 15:13:47 -06:00
|
|
|
extern void netdev_features_change(struct net_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Load a device via the kmod */
|
2007-09-17 12:56:21 -06:00
|
|
|
extern void dev_load(struct net *net, const char *name);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void dev_mcast_init(void);
|
|
|
|
extern int netdev_max_backlog;
|
|
|
|
extern int weight_p;
|
|
|
|
extern int netdev_set_master(struct net_device *dev, struct net_device *master);
|
2006-08-29 17:44:56 -06:00
|
|
|
extern int skb_checksum_help(struct sk_buff *skb);
|
2006-06-27 14:22:38 -06:00
|
|
|
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
|
2005-11-10 14:01:24 -07:00
|
|
|
#ifdef CONFIG_BUG
|
|
|
|
extern void netdev_rx_csum_fault(struct net_device *dev);
|
|
|
|
#else
|
|
|
|
static inline void netdev_rx_csum_fault(struct net_device *dev)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
/* rx skb timestamps */
|
|
|
|
extern void net_enable_timestamp(void);
|
|
|
|
extern void net_disable_timestamp(void);
|
|
|
|
|
2005-08-15 23:18:02 -06:00
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
|
|
|
|
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
|
|
|
|
extern void dev_seq_stop(struct seq_file *seq, void *v);
|
|
|
|
#endif
|
|
|
|
|
2008-06-13 19:12:04 -06:00
|
|
|
extern int netdev_class_create_file(struct class_attribute *class_attr);
|
|
|
|
extern void netdev_class_remove_file(struct class_attribute *class_attr);
|
|
|
|
|
2008-09-30 03:22:14 -06:00
|
|
|
extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
|
2008-07-21 14:31:48 -06:00
|
|
|
|
2005-08-15 23:18:02 -06:00
|
|
|
extern void linkwatch_run_queue(void);
|
|
|
|
|
2007-08-10 16:47:58 -06:00
|
|
|
extern int netdev_compute_features(unsigned long all, unsigned long one);
|
|
|
|
|
2006-06-30 14:36:35 -06:00
|
|
|
static inline int net_gso_ok(int features, int gso_type)
|
2006-06-27 14:22:38 -06:00
|
|
|
{
|
2006-06-30 14:36:35 -06:00
|
|
|
int feature = gso_type << NETIF_F_GSO_SHIFT;
|
2006-06-29 13:25:53 -06:00
|
|
|
return (features & feature) == feature;
|
2006-06-27 14:22:38 -06:00
|
|
|
}
|
|
|
|
|
2006-06-30 14:36:35 -06:00
|
|
|
static inline int skb_gso_ok(struct sk_buff *skb, int features)
|
|
|
|
{
|
2006-07-08 14:34:56 -06:00
|
|
|
return net_gso_ok(features, skb_shinfo(skb)->gso_type);
|
2006-06-30 14:36:35 -06:00
|
|
|
}
|
|
|
|
|
2006-06-22 03:40:14 -06:00
|
|
|
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
|
|
|
|
{
|
2006-07-08 14:34:56 -06:00
|
|
|
return skb_is_gso(skb) &&
|
|
|
|
(!skb_gso_ok(skb, dev->features) ||
|
2006-08-29 17:44:56 -06:00
|
|
|
unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
|
2006-06-22 03:40:14 -06:00
|
|
|
}
|
|
|
|
|
[NET]: Add per-connection option to set max TSO frame size
Update: My mailer ate one of Jarek's feedback mails... Fixed the
parameter in netif_set_gso_max_size() to be u32, not u16. Fixed the
whitespace issue due to a patch import botch. Changed the types from
u32 to unsigned int to be more consistent with other variables in the
area. Also brought the patch up to the latest net-2.6.26 tree.
Update: Made gso_max_size container 32 bits, not 16. Moved the
location of gso_max_size within netdev to be less hotpath. Made more
consistent names between the sock and netdev layers, and added a
define for the max GSO size.
Update: Respun for net-2.6.26 tree.
Update: changed max_gso_frame_size and sk_gso_max_size from signed to
unsigned - thanks Stephen!
This patch adds the ability for device drivers to control the size of
the TSO frames being sent to them, per TCP connection. By setting the
netdevice's gso_max_size value, the socket layer will set the GSO
frame size based on that value. This will propogate into the TCP
layer, and send TSO's of that size to the hardware.
This can be desirable to help tune the bursty nature of TSO on a
per-adapter basis, where one may have 1 GbE and 10 GbE devices
coexisting in a system, one running multiqueue and the other not, etc.
This can also be desirable for devices that cannot support full 64 KB
TSO's, but still want to benefit from some level of segmentation
offloading.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-03-21 04:43:19 -06:00
|
|
|
static inline void netif_set_gso_max_size(struct net_device *dev,
|
|
|
|
unsigned int size)
|
|
|
|
{
|
|
|
|
dev->gso_max_size = size;
|
|
|
|
}
|
|
|
|
|
2006-08-14 18:08:36 -06:00
|
|
|
/* On bonding slaves other than the currently active slave, suppress
|
2006-09-22 22:54:53 -06:00
|
|
|
* duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
|
|
|
|
* ARP on active-backup slaves with arp_validate enabled.
|
2006-08-14 18:08:36 -06:00
|
|
|
*/
|
|
|
|
static inline int skb_bond_should_drop(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct net_device *dev = skb->dev;
|
|
|
|
struct net_device *master = dev->master;
|
|
|
|
|
|
|
|
if (master &&
|
|
|
|
(dev->priv_flags & IFF_SLAVE_INACTIVE)) {
|
2006-09-22 22:54:53 -06:00
|
|
|
if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
|
|
|
|
skb->protocol == __constant_htons(ETH_P_ARP))
|
|
|
|
return 0;
|
|
|
|
|
2006-08-14 18:08:36 -06:00
|
|
|
if (master->priv_flags & IFF_MASTER_ALB) {
|
|
|
|
if (skb->pkt_type != PACKET_BROADCAST &&
|
|
|
|
skb->pkt_type != PACKET_MULTICAST)
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
if (master->priv_flags & IFF_MASTER_8023AD &&
|
|
|
|
skb->protocol == __constant_htons(ETH_P_SLOW))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
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|
#endif /* __KERNEL__ */
|
|
|
|
|
|
|
|
#endif /* _LINUX_DEV_H */
|