diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/interrupt.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/interrupt.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/interrupt.h b/sys/compat/linuxkpi/common/include/linux/interrupt.h new file mode 100644 index 0000000..4c0ad80 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/interrupt.h @@ -0,0 +1,158 @@ +/*- + * 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 <sys/bus.h> +#include <sys/rman.h> + +typedef irqreturn_t (*irq_handler_t)(int, void *); + +#define IRQ_RETVAL(x) ((x) != IRQ_NONE) + +#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; + int irq; +}; + +static inline int +_irq_rid(struct device *dev, int irq) +{ + if (irq == dev->irq) + return (0); + return irq - dev->msix + 1; +} + +static void +_irq_handler(void *ent) +{ + struct irq_ent *irqe; + + irqe = ent; + irqe->handler(irqe->irq, irqe->arg); +} + +static inline struct irq_ent * +_irq_ent(struct device *dev, 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 = _pci_find_irq_dev(irq); + if (dev == NULL) + return -ENXIO; + rid = _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, _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 +bind_irq_to_cpu(unsigned int irq, int cpu_id) +{ + struct irq_ent *irqe; + struct device *dev; + + dev = _pci_find_irq_dev(irq); + if (dev == NULL) + return (-ENOENT); + + irqe = _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 = _pci_find_irq_dev(irq); + if (dev == NULL) + return; + rid = _irq_rid(dev, irq); + irqe = _irq_ent(dev, irq); + if (irqe == NULL) + return; + 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); +} + +#endif /* _LINUX_INTERRUPT_H_ */ |
