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29 * @(#)netisr.h 8.1 (Berkeley) 6/10/93
33 #ifndef _NET_NETISR_H_
34 #define _NET_NETISR_H_
37 * The netisr (network interrupt service routine) provides a deferred
38 * execution evironment in which (generally inbound) network processing can
39 * take place. Protocols register handlers and, optionally, packet queues;
40 * when packets are delivered to the queue, the protocol handler will be
41 * executed directly, or via deferred dispatch depending on the
44 * Historically, this was implemented by the BSD software ISR facility; it is
45 * now implemented via a software ithread (SWI).
47 #define NETISR_POLL 0 /* polling callback, must be first */
48 #define NETISR_IP 2 /* same as AF_INET */
49 #define NETISR_ROUTE 14 /* routing socket */
50 #define NETISR_AARP 15 /* Appletalk ARP */
51 #define NETISR_ATALK2 16 /* Appletalk phase 2 */
52 #define NETISR_ATALK1 17 /* Appletalk phase 1 */
53 #define NETISR_ARP 18 /* same as AF_LINK */
54 #define NETISR_IPX 23 /* same as AF_IPX */
55 #define NETISR_USB 25 /* USB soft interrupt */
56 #define NETISR_PPP 26 /* PPP soft interrupt */
57 #define NETISR_IPV6 27
58 #define NETISR_NATM 28
60 #define NETISR_NETGRAPH 30
61 #define NETISR_POLLMORE 31 /* polling callback, must be last */
66 void legacy_setsoftnet(void);
68 extern volatile unsigned int netisr; /* scheduling bits for network */
69 #define schednetisr(anisr) do { \
70 atomic_set_rel_int(&netisr, 1 << (anisr)); \
71 legacy_setsoftnet(); \
73 /* used to atomically schedule multiple netisrs */
74 #define schednetisrbits(isrbits) do { \
75 atomic_set_rel_int(&netisr, isrbits); \
76 legacy_setsoftnet(); \
82 typedef void netisr_t (struct mbuf *);
84 void netisr_dispatch(int, struct mbuf *);
85 int netisr_queue(int, struct mbuf *);
86 #define NETISR_FORCEQUEUE 0x0002 /* Force queued dispatch. */
87 void netisr_register(int, netisr_t *, struct ifqueue *, int);
88 void netisr_unregister(int);