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 * $FreeBSD$
30 */
31 #ifndef _LINUX_INTERRUPT_H_
32 #define _LINUX_INTERRUPT_H_
33
34 #include <linux/device.h>
35 #include <linux/pci.h>
36
37 #include <sys/bus.h>
38 #include <sys/rman.h>
39
40 typedef irqreturn_t (*irq_handler_t)(int, void *);
41
42 #define IRQ_RETVAL(x) ((x) != IRQ_NONE)
43
44 #define IRQF_SHARED RF_SHAREABLE
45
46 struct irq_ent {
47 struct list_head links;
48 struct device *dev;
49 struct resource *res;
50 void *arg;
51 irqreturn_t (*handler)(int, void *);
52 void *tag;
53 int irq;
54 };
55
56 static inline int
linux_irq_rid(struct device * dev,int irq)57 linux_irq_rid(struct device *dev, int irq)
58 {
59 if (irq == dev->irq)
60 return (0);
61 return irq - dev->msix + 1;
62 }
63
64 extern void linux_irq_handler(void *);
65
66 static inline struct irq_ent *
linux_irq_ent(struct device * dev,int irq)67 linux_irq_ent(struct device *dev, int irq)
68 {
69 struct irq_ent *irqe;
70
71 list_for_each_entry(irqe, &dev->irqents, links)
72 if (irqe->irq == irq)
73 return (irqe);
74
75 return (NULL);
76 }
77
78 static inline int
request_irq(unsigned int irq,irq_handler_t handler,unsigned long flags,const char * name,void * arg)79 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
80 const char *name, void *arg)
81 {
82 struct resource *res;
83 struct irq_ent *irqe;
84 struct device *dev;
85 int error;
86 int rid;
87
88 dev = _pci_find_irq_dev(irq);
89 if (dev == NULL)
90 return -ENXIO;
91 rid = linux_irq_rid(dev, irq);
92 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid,
93 flags | RF_ACTIVE);
94 if (res == NULL)
95 return (-ENXIO);
96 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL);
97 irqe->dev = dev;
98 irqe->res = res;
99 irqe->arg = arg;
100 irqe->handler = handler;
101 irqe->irq = irq;
102 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE,
103 NULL, linux_irq_handler, irqe, &irqe->tag);
104 if (error) {
105 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
106 kfree(irqe);
107 return (-error);
108 }
109 list_add(&irqe->links, &dev->irqents);
110
111 return 0;
112 }
113
114 static inline int
bind_irq_to_cpu(unsigned int irq,int cpu_id)115 bind_irq_to_cpu(unsigned int irq, int cpu_id)
116 {
117 struct irq_ent *irqe;
118 struct device *dev;
119
120 dev = _pci_find_irq_dev(irq);
121 if (dev == NULL)
122 return (-ENOENT);
123
124 irqe = linux_irq_ent(dev, irq);
125 if (irqe == NULL)
126 return (-ENOENT);
127
128 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id));
129 }
130
131 static inline void
free_irq(unsigned int irq,void * device)132 free_irq(unsigned int irq, void *device)
133 {
134 struct irq_ent *irqe;
135 struct device *dev;
136 int rid;
137
138 dev = _pci_find_irq_dev(irq);
139 if (dev == NULL)
140 return;
141 rid = linux_irq_rid(dev, irq);
142 irqe = linux_irq_ent(dev, irq);
143 if (irqe == NULL)
144 return;
145 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
146 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
147 list_del(&irqe->links);
148 kfree(irqe);
149 }
150
151 #endif /* _LINUX_INTERRUPT_H_ */
152