2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
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.
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.
30 #ifndef _LINUX_INTERRUPT_H_
31 #define _LINUX_INTERRUPT_H_
33 #include <linux/device.h>
34 #include <linux/pci.h>
39 typedef irqreturn_t (*irq_handler_t)(int, void *);
41 #define IRQ_RETVAL(x) ((x) != IRQ_NONE)
43 #define IRQF_SHARED RF_SHAREABLE
46 struct list_head links;
50 irqreturn_t (*handler)(int, void *);
56 _irq_rid(struct device *dev, int irq)
60 return irq - dev->msix + 1;
64 _irq_handler(void *ent)
69 irqe->handler(irqe->irq, irqe->arg);
72 static inline struct irq_ent *
73 _irq_ent(struct device *dev, int irq)
77 list_for_each_entry(irqe, &dev->irqents, links)
85 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
86 const char *name, void *arg)
94 dev = _pci_find_irq_dev(irq);
97 rid = _irq_rid(dev, irq);
98 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid,
102 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL);
106 irqe->handler = handler;
108 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE,
109 NULL, _irq_handler, irqe, &irqe->tag);
111 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
115 list_add(&irqe->links, &dev->irqents);
121 free_irq(unsigned int irq, void *device)
123 struct irq_ent *irqe;
127 dev = _pci_find_irq_dev(irq);
130 rid = _irq_rid(dev, irq);
131 irqe = _irq_ent(dev, irq);
134 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
135 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
136 list_del(&irqe->links);
140 #endif /* _LINUX_INTERRUPT_H_ */