2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef _LINUX_INTERRUPT_H_
30 #define _LINUX_INTERRUPT_H_
32 #include <linux/device.h>
33 #include <linux/pci.h>
38 typedef irqreturn_t (*irq_handler_t)(int, void *);
40 #define IRQ_RETVAL(x) ((x) != IRQ_NONE)
42 #define IRQF_SHARED RF_SHAREABLE
45 struct list_head links;
49 irqreturn_t (*handler)(int, void *);
55 _irq_rid(struct device *dev, int irq)
59 return irq - dev->msix + 1;
63 _irq_handler(void *ent)
68 irqe->handler(irqe->irq, irqe->arg);
71 static inline struct irq_ent *
72 _irq_ent(struct device *dev, int irq)
76 list_for_each_entry(irqe, &dev->irqents, links)
84 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
85 const char *name, void *arg)
93 dev = _pci_find_irq_dev(irq);
96 rid = _irq_rid(dev, irq);
97 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid,
101 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL);
105 irqe->handler = handler;
107 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE,
108 NULL, _irq_handler, irqe, &irqe->tag);
110 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
114 list_add(&irqe->links, &dev->irqents);
120 free_irq(unsigned int irq, void *device)
122 struct irq_ent *irqe;
126 dev = _pci_find_irq_dev(irq);
129 rid = _irq_rid(dev, irq);
130 irqe = _irq_ent(dev, irq);
133 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
134 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
135 list_del(&irqe->links);
139 #endif /* _LINUX_INTERRUPT_H_ */