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 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_INTERRUPT_H_ 32 #define _LINUX_INTERRUPT_H_ 33 34 #include <linux/device.h> 35 #include <linux/pci.h> 36 37 #include <sys/bus.h> 38 #include <sys/rman.h> 39 40 typedef irqreturn_t (*irq_handler_t)(int, void *); 41 42 #define IRQ_RETVAL(x) ((x) != IRQ_NONE) 43 44 #define IRQF_SHARED RF_SHAREABLE 45 46 struct irq_ent { 47 struct list_head links; 48 struct device *dev; 49 struct resource *res; 50 void *arg; 51 irqreturn_t (*handler)(int, void *); 52 void *tag; 53 unsigned int irq; 54 }; 55 56 static inline int 57 linux_irq_rid(struct device *dev, unsigned int irq) 58 { 59 if (irq == dev->irq) 60 return (0); 61 return irq - dev->msix + 1; 62 } 63 64 extern void linux_irq_handler(void *); 65 66 static inline struct irq_ent * 67 linux_irq_ent(struct device *dev, unsigned int irq) 68 { 69 struct irq_ent *irqe; 70 71 list_for_each_entry(irqe, &dev->irqents, links) 72 if (irqe->irq == irq) 73 return (irqe); 74 75 return (NULL); 76 } 77 78 static inline int 79 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, 80 const char *name, void *arg) 81 { 82 struct resource *res; 83 struct irq_ent *irqe; 84 struct device *dev; 85 int error; 86 int rid; 87 88 dev = linux_pci_find_irq_dev(irq); 89 if (dev == NULL) 90 return -ENXIO; 91 rid = linux_irq_rid(dev, irq); 92 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid, 93 flags | RF_ACTIVE); 94 if (res == NULL) 95 return (-ENXIO); 96 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL); 97 irqe->dev = dev; 98 irqe->res = res; 99 irqe->arg = arg; 100 irqe->handler = handler; 101 irqe->irq = irq; 102 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE, 103 NULL, linux_irq_handler, irqe, &irqe->tag); 104 if (error) { 105 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 106 kfree(irqe); 107 return (-error); 108 } 109 list_add(&irqe->links, &dev->irqents); 110 111 return 0; 112 } 113 114 static inline int 115 bind_irq_to_cpu(unsigned int irq, int cpu_id) 116 { 117 struct irq_ent *irqe; 118 struct device *dev; 119 120 dev = linux_pci_find_irq_dev(irq); 121 if (dev == NULL) 122 return (-ENOENT); 123 124 irqe = linux_irq_ent(dev, irq); 125 if (irqe == NULL) 126 return (-ENOENT); 127 128 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id)); 129 } 130 131 static inline void 132 free_irq(unsigned int irq, void *device) 133 { 134 struct irq_ent *irqe; 135 struct device *dev; 136 int rid; 137 138 dev = linux_pci_find_irq_dev(irq); 139 if (dev == NULL) 140 return; 141 rid = linux_irq_rid(dev, irq); 142 irqe = linux_irq_ent(dev, irq); 143 if (irqe == NULL) 144 return; 145 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 146 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 147 list_del(&irqe->links); 148 kfree(irqe); 149 } 150 151 #endif /* _LINUX_INTERRUPT_H_ */ 152