7f3b205cb8
whether or not the isr needs to hold Giant when running; Giant-less operation is also controlled by the setting of debug_mpsafenet o mark all netisr's except NETISR_IP as needing Giant o add a GIANT_REQUIRED assertion to the top of netisr's that need Giant o pickup Giant (when debug_mpsafenet is 1) inside ip_input before calling up with a packet o change netisr handling so swi_net runs w/o Giant; instead we grab Giant before invoking handlers based on whether the handler needs Giant o change netisr handling so that netisr's that are marked MPSAFE may have multiple instances active at a time o add netisr statistics for packets dropped because the isr is inactive Supported by: FreeBSD Foundation
102 lines
3.8 KiB
C
102 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 1980, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)netisr.h 8.1 (Berkeley) 6/10/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NET_NETISR_H_
|
|
#define _NET_NETISR_H_
|
|
|
|
/*
|
|
* The networking code runs off software interrupts.
|
|
*
|
|
* You can switch into the network by doing splnet() and return by splx().
|
|
* The software interrupt level for the network is higher than the software
|
|
* level for the clock (so you can enter the network in routines called
|
|
* at timeout time).
|
|
*/
|
|
|
|
/*
|
|
* Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
|
|
* word which is used to de-multiplex a single software
|
|
* interrupt used for scheduling the network code to calls
|
|
* on the lowest level routine of each protocol.
|
|
*/
|
|
#define NETISR_POLL 0 /* polling callback, must be first */
|
|
#define NETISR_IP 2 /* same as AF_INET */
|
|
#define NETISR_AARP 15 /* Appletalk ARP */
|
|
#define NETISR_ATALK2 16 /* Appletalk phase 2 */
|
|
#define NETISR_ATALK1 17 /* Appletalk phase 1 */
|
|
#define NETISR_ARP 18 /* same as AF_LINK */
|
|
#define NETISR_IPX 23 /* same as AF_IPX */
|
|
#define NETISR_USB 25 /* USB soft interrupt */
|
|
#define NETISR_PPP 26 /* PPP soft interrupt */
|
|
#define NETISR_IPV6 27
|
|
#define NETISR_NATM 28
|
|
#define NETISR_ATM 29
|
|
#define NETISR_NETGRAPH 30
|
|
#define NETISR_POLLMORE 31 /* polling callback, must be last */
|
|
|
|
|
|
#ifndef LOCORE
|
|
#ifdef _KERNEL
|
|
|
|
void legacy_setsoftnet(void);
|
|
|
|
extern volatile unsigned int netisr; /* scheduling bits for network */
|
|
#define schednetisr(anisr) do { \
|
|
atomic_set_rel_int(&netisr, 1 << (anisr)); \
|
|
legacy_setsoftnet(); \
|
|
} while (0)
|
|
/* used to atomically schedule multiple netisrs */
|
|
#define schednetisrbits(isrbits) do { \
|
|
atomic_set_rel_int(&netisr, isrbits); \
|
|
legacy_setsoftnet(); \
|
|
} while (0)
|
|
|
|
struct ifqueue;
|
|
struct mbuf;
|
|
|
|
typedef void netisr_t (struct mbuf *);
|
|
|
|
void netisr_dispatch(int, struct mbuf *);
|
|
int netisr_queue(int, struct mbuf *);
|
|
#define NETISR_MPSAFE 0x0001 /* ISR does not need Giant */
|
|
void netisr_register(int, netisr_t *, struct ifqueue *, int);
|
|
void netisr_unregister(int);
|
|
|
|
#endif
|
|
#endif
|
|
|
|
#endif
|