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 int irq; 54 }; 55 56 static inline int 57 _irq_rid(struct device *dev, int irq) 58 { 59 if (irq == dev->irq) 60 return (0); 61 return irq - dev->msix + 1; 62 } 63 64 static inline void 65 _irq_handler(void *ent) 66 { 67 struct irq_ent *irqe; 68 69 irqe = ent; 70 irqe->handler(irqe->irq, irqe->arg); 71 } 72 73 static inline struct irq_ent * 74 _irq_ent(struct device *dev, int irq) 75 { 76 struct irq_ent *irqe; 77 78 list_for_each_entry(irqe, &dev->irqents, links) 79 if (irqe->irq == irq) 80 return (irqe); 81 82 return (NULL); 83 } 84 85 static inline int 86 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, 87 const char *name, void *arg) 88 { 89 struct resource *res; 90 struct irq_ent *irqe; 91 struct device *dev; 92 int error; 93 int rid; 94 95 dev = _pci_find_irq_dev(irq); 96 if (dev == NULL) 97 return -ENXIO; 98 rid = _irq_rid(dev, irq); 99 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid, 100 flags | RF_ACTIVE); 101 if (res == NULL) 102 return (-ENXIO); 103 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL); 104 irqe->dev = dev; 105 irqe->res = res; 106 irqe->arg = arg; 107 irqe->handler = handler; 108 irqe->irq = irq; 109 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE, 110 NULL, _irq_handler, irqe, &irqe->tag); 111 if (error) { 112 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 113 kfree(irqe); 114 return (-error); 115 } 116 list_add(&irqe->links, &dev->irqents); 117 118 return 0; 119 } 120 121 static inline int 122 bind_irq_to_cpu(unsigned int irq, int cpu_id) 123 { 124 struct irq_ent *irqe; 125 struct device *dev; 126 127 dev = _pci_find_irq_dev(irq); 128 if (dev == NULL) 129 return (-ENOENT); 130 131 irqe = _irq_ent(dev, irq); 132 if (irqe == NULL) 133 return (-ENOENT); 134 135 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id)); 136 } 137 138 static inline void 139 free_irq(unsigned int irq, void *device) 140 { 141 struct irq_ent *irqe; 142 struct device *dev; 143 int rid; 144 145 dev = _pci_find_irq_dev(irq); 146 if (dev == NULL) 147 return; 148 rid = _irq_rid(dev, irq); 149 irqe = _irq_ent(dev, irq); 150 if (irqe == NULL) 151 return; 152 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 153 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 154 list_del(&irqe->links); 155 kfree(irqe); 156 } 157 158 #endif /* _LINUX_INTERRUPT_H_ */ 159