xref: /illumos-gate/usr/src/uts/common/sys/avintr.h (revision ba3594ba)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
23  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 #ifndef _SYS_AVINTR_H
27 #define	_SYS_AVINTR_H
28 
29 
30 #include <sys/mutex.h>
31 #include <sys/dditypes.h>
32 #include <sys/ddi_intr.h>
33 
34 #ifdef	__cplusplus
35 extern "C" {
36 #endif
37 
38 /*
39  * Period of autovector structures (add this in to get the next level).
40  */
41 #define	MAXIPL	16
42 #define	INT_IPL(x) (x)
43 #define	AV_INT_SPURIOUS	-1
44 
45 typedef uint_t (*avfunc)(caddr_t, caddr_t);
46 
47 struct autovec {
48 
49 	/*
50 	 * Interrupt handler and argument to pass to it.
51 	 */
52 
53 	struct autovec *av_link;	/* pointer to next on in chain */
54 	uint_t	(*av_vector)();
55 	caddr_t	av_intarg1;
56 	caddr_t	av_intarg2;
57 	uint64_t *av_ticksp;
58 	uint_t	av_prilevel;		/* priority level */
59 
60 	/*
61 	 * Interrupt handle/id (like intrspec structure pointer) used to
62 	 * identify a specific instance of interrupt handler in case we
63 	 * have to remove the interrupt handler later.
64 	 *
65 	 */
66 	void	*av_intr_id;
67 	dev_info_t *av_dip;
68 	ushort_t	av_flags;	/* pending flags */
69 	struct autovec *av_ipl_link;	/* pointer to next on ipl chain */
70 };
71 
72 #define	AV_PENTRY_VECTMASK	0xff	/* low 8 bit used for irqno */
73 #define	AV_PENTRY_PEND	0x100	/* pending hardware interrupt */
74 #define	AV_PENTRY_ONPROC	0x200	/* being serviced by CPU */
75 #define	AV_PENTRY_LEVEL	0x8000	/* level-triggered interrupt */
76 
77 struct av_head {
78 	struct 	autovec	*avh_link;
79 	ushort_t	avh_hi_pri;
80 	ushort_t	avh_lo_pri;
81 };
82 
83 /* softing contains a bit field of software interrupts which are pending */
84 struct softint {
85 	int st_pending;
86 };
87 
88 #ifdef _KERNEL
89 
90 extern kmutex_t av_lock;
91 extern ddi_softint_hdl_impl_t softlevel_hdl[];
92 extern ddi_softint_hdl_impl_t softlevel1_hdl;
93 extern int add_avintr(void *intr_id, int lvl, avfunc xxintr, char *name,
94 	int vect, caddr_t arg1, caddr_t arg2, uint64_t *, dev_info_t *);
95 extern int add_nmintr(int lvl, avfunc nmintr, char *name, caddr_t arg);
96 extern int add_avsoftintr(void *intr_id, int lvl, avfunc xxintr,
97 	char *name, caddr_t arg1, caddr_t arg2);
98 extern int rem_avsoftintr(void *intr_id, int lvl, avfunc xxintr);
99 extern int av_softint_movepri(void *intr_id, int old_lvl);
100 extern void update_avsoftintr_args(void *intr_id, int lvl, caddr_t arg2);
101 extern void rem_avintr(void *intr_id, int lvl, avfunc xxintr, int vect);
102 extern void wait_till_seen(int ipl);
103 extern uint_t softlevel1(caddr_t, caddr_t);
104 
105 #endif	/* _KERNEL */
106 
107 #ifdef	__cplusplus
108 }
109 #endif
110 
111 #endif /* _SYS_AVINTR_H */
112