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.
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.
31 #ifndef _LINUX_INTERRUPT_H_
32 #define _LINUX_INTERRUPT_H_
34 #include <linux/device.h>
35 #include <linux/pci.h>
40 typedef irqreturn_t (*irq_handler_t)(int, void *);
42 #define IRQ_RETVAL(x) ((x) != IRQ_NONE)
44 #define IRQF_SHARED RF_SHAREABLE
47 struct list_head links;
51 irqreturn_t (*handler)(int, void *);
57 linux_irq_rid(struct device *dev, unsigned int irq)
61 return irq - dev->msix + 1;
64 extern void linux_irq_handler(void *);
66 static inline struct irq_ent *
67 linux_irq_ent(struct device *dev, unsigned int irq)
71 list_for_each_entry(irqe, &dev->irqents, links)
79 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
80 const char *name, void *arg)
88 dev = linux_pci_find_irq_dev(irq);
91 rid = linux_irq_rid(dev, irq);
92 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid,
96 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL);
100 irqe->handler = handler;
102 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE,
103 NULL, linux_irq_handler, irqe, &irqe->tag);
105 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
109 list_add(&irqe->links, &dev->irqents);
115 enable_irq(unsigned int irq)
117 struct irq_ent *irqe;
120 dev = linux_pci_find_irq_dev(irq);
123 irqe = linux_irq_ent(dev, irq);
124 if (irqe == NULL || irqe->tag != NULL)
126 return -bus_setup_intr(dev->bsddev, irqe->res, INTR_TYPE_NET | INTR_MPSAFE,
127 NULL, linux_irq_handler, irqe, &irqe->tag);
131 disable_irq(unsigned int irq)
133 struct irq_ent *irqe;
136 dev = linux_pci_find_irq_dev(irq);
139 irqe = linux_irq_ent(dev, irq);
142 if (irqe->tag != NULL)
143 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
148 bind_irq_to_cpu(unsigned int irq, int cpu_id)
150 struct irq_ent *irqe;
153 dev = linux_pci_find_irq_dev(irq);
157 irqe = linux_irq_ent(dev, irq);
161 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id));
165 free_irq(unsigned int irq, void *device)
167 struct irq_ent *irqe;
171 dev = linux_pci_find_irq_dev(irq);
174 rid = linux_irq_rid(dev, irq);
175 irqe = linux_irq_ent(dev, irq);
178 if (irqe->tag != NULL)
179 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
180 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
181 list_del(&irqe->links);
186 * LinuxKPI tasklet support
188 typedef void tasklet_func_t(unsigned long);
190 struct tasklet_struct {
191 TAILQ_ENTRY(tasklet_struct) entry;
192 tasklet_func_t *func;
196 #define DECLARE_TASKLET(name, func, data) \
197 struct tasklet_struct name = { { NULL, NULL }, func, data }
199 #define tasklet_hi_schedule(t) tasklet_schedule(t)
201 extern void tasklet_schedule(struct tasklet_struct *);
202 extern void tasklet_kill(struct tasklet_struct *);
203 extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *,
205 extern void tasklet_enable(struct tasklet_struct *);
206 extern void tasklet_disable(struct tasklet_struct *);
208 #endif /* _LINUX_INTERRUPT_H_ */