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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2015 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUX_INTERRUPT_H_
#define _LINUX_INTERRUPT_H_
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/irqreturn.h>
#include <sys/bus.h>
#include <sys/rman.h>
typedef irqreturn_t (*irq_handler_t)(int, void *);
#define IRQF_SHARED RF_SHAREABLE
struct irq_ent {
struct list_head links;
struct device *dev;
struct resource *res;
void *arg;
irqreturn_t (*handler)(int, void *);
void *tag;
unsigned int irq;
};
static inline int
linux_irq_rid(struct device *dev, unsigned int irq)
{
if (irq == dev->irq)
return (0);
return irq - dev->msix + 1;
}
extern void linux_irq_handler(void *);
static inline struct irq_ent *
linux_irq_ent(struct device *dev, unsigned int irq)
{
struct irq_ent *irqe;
list_for_each_entry(irqe, &dev->irqents, links)
if (irqe->irq == irq)
return (irqe);
return (NULL);
}
static inline int
request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
const char *name, void *arg)
{
struct resource *res;
struct irq_ent *irqe;
struct device *dev;
int error;
int rid;
dev = linux_pci_find_irq_dev(irq);
if (dev == NULL)
return -ENXIO;
rid = linux_irq_rid(dev, irq);
res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid,
flags | RF_ACTIVE);
if (res == NULL)
return (-ENXIO);
irqe = kmalloc(sizeof(*irqe), GFP_KERNEL);
irqe->dev = dev;
irqe->res = res;
irqe->arg = arg;
irqe->handler = handler;
irqe->irq = irq;
error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, linux_irq_handler, irqe, &irqe->tag);
if (error) {
bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
kfree(irqe);
return (-error);
}
list_add(&irqe->links, &dev->irqents);
return 0;
}
static inline int
enable_irq(unsigned int irq)
{
struct irq_ent *irqe;
struct device *dev;
dev = linux_pci_find_irq_dev(irq);
if (dev == NULL)
return -EINVAL;
irqe = linux_irq_ent(dev, irq);
if (irqe == NULL || irqe->tag != NULL)
return -EINVAL;
return -bus_setup_intr(dev->bsddev, irqe->res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, linux_irq_handler, irqe, &irqe->tag);
}
static inline void
disable_irq(unsigned int irq)
{
struct irq_ent *irqe;
struct device *dev;
dev = linux_pci_find_irq_dev(irq);
if (dev == NULL)
return;
irqe = linux_irq_ent(dev, irq);
if (irqe == NULL)
return;
if (irqe->tag != NULL)
bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
irqe->tag = NULL;
}
static inline int
bind_irq_to_cpu(unsigned int irq, int cpu_id)
{
struct irq_ent *irqe;
struct device *dev;
dev = linux_pci_find_irq_dev(irq);
if (dev == NULL)
return (-ENOENT);
irqe = linux_irq_ent(dev, irq);
if (irqe == NULL)
return (-ENOENT);
return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id));
}
static inline void
free_irq(unsigned int irq, void *device)
{
struct irq_ent *irqe;
struct device *dev;
int rid;
dev = linux_pci_find_irq_dev(irq);
if (dev == NULL)
return;
rid = linux_irq_rid(dev, irq);
irqe = linux_irq_ent(dev, irq);
if (irqe == NULL)
return;
if (irqe->tag != NULL)
bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag);
bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res);
list_del(&irqe->links);
kfree(irqe);
}
/*
* LinuxKPI tasklet support
*/
typedef void tasklet_func_t(unsigned long);
struct tasklet_struct {
TAILQ_ENTRY(tasklet_struct) entry;
tasklet_func_t *func;
/* Our "state" implementation is different. Avoid same name as Linux. */
volatile u_int tasklet_state;
atomic_t count;
unsigned long data;
};
#define DECLARE_TASKLET(name, func, data) \
struct tasklet_struct name = { { NULL, NULL }, func, ATOMIC_INIT(0), data }
#define tasklet_hi_schedule(t) tasklet_schedule(t)
extern void tasklet_schedule(struct tasklet_struct *);
extern void tasklet_kill(struct tasklet_struct *);
extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *,
unsigned long data);
extern void tasklet_enable(struct tasklet_struct *);
extern void tasklet_disable(struct tasklet_struct *);
extern int tasklet_trylock(struct tasklet_struct *);
extern void tasklet_unlock(struct tasklet_struct *);
extern void tasklet_unlock_wait(struct tasklet_struct *ts);
#endif /* _LINUX_INTERRUPT_H_ */
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