1/*- 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. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 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. 17 * 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. 28 */ 29 30#ifndef _LINUX_INTERRUPT_H_ 31#define _LINUX_INTERRUPT_H_ 32 33#include <linux/device.h> 34#include <linux/pci.h> 35 36#include <sys/bus.h> 37#include <sys/rman.h> 38 39typedef irqreturn_t (*irq_handler_t)(int, void *); 40 41#define IRQ_RETVAL(x) ((x) != IRQ_NONE) 42 43#define IRQF_SHARED RF_SHAREABLE 44 45struct irq_ent { 46 struct list_head links; 47 struct device *dev; 48 struct resource *res; 49 void *arg; 50 irqreturn_t (*handler)(int, void *); 51 void *tag; 52 int irq; 53}; 54 55static inline int 56_irq_rid(struct device *dev, int irq) 57{ 58 if (irq == dev->irq) 59 return (0); 60 return irq - dev->msix + 1; 61} 62 63static void 64_irq_handler(void *ent) 65{ 66 struct irq_ent *irqe; 67 68 irqe = ent; 69 irqe->handler(irqe->irq, irqe->arg); 70} 71 72static inline struct irq_ent * 73_irq_ent(struct device *dev, int irq) 74{ 75 struct irq_ent *irqe; 76 77 list_for_each_entry(irqe, &dev->irqents, links) 78 if (irqe->irq == irq) 79 return (irqe); 80 81 return (NULL); 82} 83 84static inline int 85request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, 86 const char *name, void *arg) 87{ 88 struct resource *res; 89 struct irq_ent *irqe; 90 struct device *dev; 91 int error; 92 int rid; 93 94 dev = _pci_find_irq_dev(irq); 95 if (dev == NULL) 96 return -ENXIO; 97 rid = _irq_rid(dev, irq); 98 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid, 99 flags | RF_ACTIVE); 100 if (res == NULL) 101 return (-ENXIO); 102 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL); 103 irqe->dev = dev; 104 irqe->res = res; 105 irqe->arg = arg; 106 irqe->handler = handler; 107 irqe->irq = irq; 108 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE, 109 NULL, _irq_handler, irqe, &irqe->tag); 110 if (error) { 111 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 112 kfree(irqe); 113 return (-error); 114 } 115 list_add(&irqe->links, &dev->irqents); 116 117 return 0; 118} 119 120static inline int 121enable_irq(unsigned int irq) 122{ 123 struct irq_ent *irqe; 124 struct device *dev; 125 126 dev = _pci_find_irq_dev(irq); 127 if (dev == NULL) 128 return -EINVAL; 129 irqe = _irq_ent(dev, irq); 130 if (irqe == NULL || irqe->tag != NULL) 131 return -EINVAL; 132 return -bus_setup_intr(dev->bsddev, irqe->res, INTR_TYPE_NET | INTR_MPSAFE, 133 NULL, _irq_handler, irqe, &irqe->tag); 134} 135 136static inline void 137disable_irq(unsigned int irq) 138{ 139 struct irq_ent *irqe; 140 struct device *dev; 141 142 dev = _pci_find_irq_dev(irq); 143 if (dev == NULL) 144 return; 145 irqe = _irq_ent(dev, irq); 146 if (irqe == NULL) 147 return; 148 if (irqe->tag != NULL) 149 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 150 irqe->tag = NULL; 151} 152 153static inline int 154bind_irq_to_cpu(unsigned int irq, int cpu_id) 155{ 156 struct irq_ent *irqe; 157 struct device *dev; 158 159 dev = _pci_find_irq_dev(irq); 160 if (dev == NULL) 161 return (-ENOENT); 162 163 irqe = _irq_ent(dev, irq); 164 if (irqe == NULL) 165 return (-ENOENT); 166 167 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id)); 168} 169 170static inline void 171free_irq(unsigned int irq, void *device) 172{ 173 struct irq_ent *irqe; 174 struct device *dev; 175 int rid; 176 177 dev = _pci_find_irq_dev(irq); 178 if (dev == NULL) 179 return; 180 rid = _irq_rid(dev, irq); 181 irqe = _irq_ent(dev, irq); 182 if (irqe == NULL) 183 return; 184 if (irqe->tag != NULL) 185 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 186 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 187 list_del(&irqe->links); 188 kfree(irqe); 189} 190 191#endif /* _LINUX_INTERRUPT_H_ */ 192