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 #include <linux/irqreturn.h> 37 38 #include <sys/bus.h> 39 #include <sys/rman.h> 40 41 typedef irqreturn_t (*irq_handler_t)(int, void *); 42 43 #define IRQF_SHARED RF_SHAREABLE 44 45 struct 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 unsigned int irq; 53 }; 54 55 static inline int 56 linux_irq_rid(struct device *dev, unsigned int irq) 57 { 58 if (irq == dev->irq) 59 return (0); 60 return irq - dev->msix + 1; 61 } 62 63 extern void linux_irq_handler(void *); 64 65 static inline struct irq_ent * 66 linux_irq_ent(struct device *dev, unsigned int irq) 67 { 68 struct irq_ent *irqe; 69 70 list_for_each_entry(irqe, &dev->irqents, links) 71 if (irqe->irq == irq) 72 return (irqe); 73 74 return (NULL); 75 } 76 77 static inline int 78 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, 79 const char *name, void *arg) 80 { 81 struct resource *res; 82 struct irq_ent *irqe; 83 struct device *dev; 84 int error; 85 int rid; 86 87 dev = linux_pci_find_irq_dev(irq); 88 if (dev == NULL) 89 return -ENXIO; 90 rid = linux_irq_rid(dev, irq); 91 res = bus_alloc_resource_any(dev->bsddev, SYS_RES_IRQ, &rid, 92 flags | RF_ACTIVE); 93 if (res == NULL) 94 return (-ENXIO); 95 irqe = kmalloc(sizeof(*irqe), GFP_KERNEL); 96 irqe->dev = dev; 97 irqe->res = res; 98 irqe->arg = arg; 99 irqe->handler = handler; 100 irqe->irq = irq; 101 error = bus_setup_intr(dev->bsddev, res, INTR_TYPE_NET | INTR_MPSAFE, 102 NULL, linux_irq_handler, irqe, &irqe->tag); 103 if (error) { 104 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 105 kfree(irqe); 106 return (-error); 107 } 108 list_add(&irqe->links, &dev->irqents); 109 110 return 0; 111 } 112 113 static inline int 114 enable_irq(unsigned int irq) 115 { 116 struct irq_ent *irqe; 117 struct device *dev; 118 119 dev = linux_pci_find_irq_dev(irq); 120 if (dev == NULL) 121 return -EINVAL; 122 irqe = linux_irq_ent(dev, irq); 123 if (irqe == NULL || irqe->tag != NULL) 124 return -EINVAL; 125 return -bus_setup_intr(dev->bsddev, irqe->res, INTR_TYPE_NET | INTR_MPSAFE, 126 NULL, linux_irq_handler, irqe, &irqe->tag); 127 } 128 129 static inline void 130 disable_irq(unsigned int irq) 131 { 132 struct irq_ent *irqe; 133 struct device *dev; 134 135 dev = linux_pci_find_irq_dev(irq); 136 if (dev == NULL) 137 return; 138 irqe = linux_irq_ent(dev, irq); 139 if (irqe == NULL) 140 return; 141 if (irqe->tag != NULL) 142 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 143 irqe->tag = NULL; 144 } 145 146 static inline int 147 bind_irq_to_cpu(unsigned int irq, int cpu_id) 148 { 149 struct irq_ent *irqe; 150 struct device *dev; 151 152 dev = linux_pci_find_irq_dev(irq); 153 if (dev == NULL) 154 return (-ENOENT); 155 156 irqe = linux_irq_ent(dev, irq); 157 if (irqe == NULL) 158 return (-ENOENT); 159 160 return (-bus_bind_intr(dev->bsddev, irqe->res, cpu_id)); 161 } 162 163 static inline void 164 free_irq(unsigned int irq, void *device) 165 { 166 struct irq_ent *irqe; 167 struct device *dev; 168 int rid; 169 170 dev = linux_pci_find_irq_dev(irq); 171 if (dev == NULL) 172 return; 173 rid = linux_irq_rid(dev, irq); 174 irqe = linux_irq_ent(dev, irq); 175 if (irqe == NULL) 176 return; 177 if (irqe->tag != NULL) 178 bus_teardown_intr(dev->bsddev, irqe->res, irqe->tag); 179 bus_release_resource(dev->bsddev, SYS_RES_IRQ, rid, irqe->res); 180 list_del(&irqe->links); 181 kfree(irqe); 182 } 183 184 /* 185 * LinuxKPI tasklet support 186 */ 187 typedef void tasklet_func_t(unsigned long); 188 189 struct tasklet_struct { 190 TAILQ_ENTRY(tasklet_struct) entry; 191 tasklet_func_t *func; 192 unsigned long data; 193 }; 194 195 #define DECLARE_TASKLET(name, func, data) \ 196 struct tasklet_struct name = { { NULL, NULL }, func, data } 197 198 #define tasklet_hi_schedule(t) tasklet_schedule(t) 199 200 extern void tasklet_schedule(struct tasklet_struct *); 201 extern void tasklet_kill(struct tasklet_struct *); 202 extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *, 203 unsigned long data); 204 extern void tasklet_enable(struct tasklet_struct *); 205 extern void tasklet_disable(struct tasklet_struct *); 206 207 #endif /* _LINUX_INTERRUPT_H_ */ 208