1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2015 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef	_LINUXKPI_LINUX_INTERRUPT_H_
30#define	_LINUXKPI_LINUX_INTERRUPT_H_
31
32#include <linux/cpu.h>
33#include <linux/device.h>
34#include <linux/pci.h>
35#include <linux/irqreturn.h>
36#include <linux/hardirq.h>
37
38#include <sys/param.h>
39#include <sys/interrupt.h>
40
41typedef	irqreturn_t	(*irq_handler_t)(int, void *);
42
43#define	IRQF_SHARED		0x0004	/* Historically */
44#define	IRQF_NOBALANCING	0
45
46#define	IRQ_DISABLE_UNLAZY	0
47
48#define	IRQ_NOTCONNECTED	(1U << 31)
49
50int  lkpi_request_irq(struct device *, unsigned int, irq_handler_t,
51	irq_handler_t, unsigned long, const char *, void *);
52int  lkpi_enable_irq(unsigned int);
53void lkpi_disable_irq(unsigned int);
54int  lkpi_bind_irq_to_cpu(unsigned int, int);
55void lkpi_free_irq(unsigned int, void *);
56void lkpi_devm_free_irq(struct device *, unsigned int, void *);
57
58static inline int
59request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
60    const char *name, void *arg)
61{
62
63	return (lkpi_request_irq(NULL, irq, handler, NULL, flags, name, arg));
64}
65
66static inline int
67request_threaded_irq(int irq, irq_handler_t handler,
68    irq_handler_t thread_handler, unsigned long flags,
69    const char *name, void *arg)
70{
71
72	return (lkpi_request_irq(NULL, irq, handler, thread_handler,
73	    flags, name, arg));
74}
75
76static inline int
77devm_request_irq(struct device *dev, int irq,
78    irq_handler_t handler, unsigned long flags, const char *name, void *arg)
79{
80
81	return (lkpi_request_irq(dev, irq, handler, NULL, flags, name, arg));
82}
83
84static inline int
85devm_request_threaded_irq(struct device *dev, int irq,
86    irq_handler_t handler, irq_handler_t thread_handler,
87    unsigned long flags, const char *name, void *arg)
88{
89
90	return (lkpi_request_irq(dev, irq, handler, thread_handler,
91	    flags, name, arg));
92}
93
94static inline int
95enable_irq(unsigned int irq)
96{
97	return (lkpi_enable_irq(irq));
98}
99
100static inline void
101disable_irq(unsigned int irq)
102{
103	lkpi_disable_irq(irq);
104}
105
106static inline void
107disable_irq_nosync(unsigned int irq)
108{
109	lkpi_disable_irq(irq);
110}
111
112static inline int
113bind_irq_to_cpu(unsigned int irq, int cpu_id)
114{
115	return (lkpi_bind_irq_to_cpu(irq, cpu_id));
116}
117
118static inline void
119free_irq(unsigned int irq, void *device)
120{
121	lkpi_free_irq(irq, device);
122}
123
124static inline void
125devm_free_irq(struct device *xdev, unsigned int irq, void *p)
126{
127	lkpi_devm_free_irq(xdev, irq, p);
128}
129
130static inline int
131irq_set_affinity_hint(int vector, const cpumask_t *mask)
132{
133	int error;
134
135	if (mask != NULL)
136		error = intr_setaffinity(vector, CPU_WHICH_IRQ, mask);
137	else
138		error = intr_setaffinity(vector, CPU_WHICH_IRQ, cpuset_root);
139
140	return (-error);
141}
142
143static inline struct msi_desc *
144irq_get_msi_desc(unsigned int irq)
145{
146
147	return (lkpi_pci_msi_desc_alloc(irq));
148}
149
150static inline void
151irq_set_status_flags(unsigned int irq __unused, unsigned long flags __unused)
152{
153}
154
155/*
156 * LinuxKPI tasklet support
157 */
158struct tasklet_struct;
159typedef void tasklet_func_t(unsigned long);
160typedef void tasklet_callback_t(struct tasklet_struct *);
161
162struct tasklet_struct {
163	TAILQ_ENTRY(tasklet_struct) entry;
164	tasklet_func_t *func;
165	/* Our "state" implementation is different. Avoid same name as Linux. */
166	volatile u_int tasklet_state;
167	atomic_t count;
168	unsigned long data;
169	tasklet_callback_t *callback;
170	bool use_callback;
171};
172
173#define	DECLARE_TASKLET(_name, _func, _data)	\
174struct tasklet_struct _name = { .func = (_func), .data = (_data) }
175
176#define	tasklet_hi_schedule(t)	tasklet_schedule(t)
177
178/* Some other compat code in the tree has this defined as well. */
179#define	from_tasklet(_dev, _t, _field)		\
180    container_of(_t, typeof(*(_dev)), _field)
181
182void tasklet_setup(struct tasklet_struct *, tasklet_callback_t *);
183extern void tasklet_schedule(struct tasklet_struct *);
184extern void tasklet_kill(struct tasklet_struct *);
185extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *,
186    unsigned long data);
187extern void tasklet_enable(struct tasklet_struct *);
188extern void tasklet_disable(struct tasklet_struct *);
189extern void tasklet_disable_nosync(struct tasklet_struct *);
190extern int tasklet_trylock(struct tasklet_struct *);
191extern void tasklet_unlock(struct tasklet_struct *);
192extern void tasklet_unlock_wait(struct tasklet_struct *ts);
193#define	tasklet_unlock_spin_wait(ts)	tasklet_unlock_wait(ts)
194
195#endif	/* _LINUXKPI_LINUX_INTERRUPT_H_ */
196