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 #ifndef _LINUXKPI_LINUX_INTERRUPT_H_ 30 #define _LINUXKPI_LINUX_INTERRUPT_H_ 31 32 #include <linux/cpu.h> 33 #include <linux/device.h> 34 #include <linux/pci.h> 35 #include <linux/irqreturn.h> 36 #include <linux/hardirq.h> 37 38 #include <sys/param.h> 39 #include <sys/interrupt.h> 40 41 typedef irqreturn_t (*irq_handler_t)(int, void *); 42 43 #define IRQF_SHARED 0x0004 /* Historically */ 44 #define IRQF_NOBALANCING 0 45 46 #define IRQ_DISABLE_UNLAZY 0 47 48 #define IRQ_NOTCONNECTED (1U << 31) 49 50 int lkpi_request_irq(struct device *, unsigned int, irq_handler_t, 51 irq_handler_t, unsigned long, const char *, void *); 52 int lkpi_enable_irq(unsigned int); 53 void lkpi_disable_irq(unsigned int); 54 int lkpi_bind_irq_to_cpu(unsigned int, int); 55 void lkpi_free_irq(unsigned int, void *); 56 void lkpi_devm_free_irq(struct device *, unsigned int, void *); 57 58 static inline int 59 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, 60 const char *name, void *arg) 61 { 62 63 return (lkpi_request_irq(NULL, irq, handler, NULL, flags, name, arg)); 64 } 65 66 static inline int 67 request_threaded_irq(int irq, irq_handler_t handler, 68 irq_handler_t thread_handler, unsigned long flags, 69 const char *name, void *arg) 70 { 71 72 return (lkpi_request_irq(NULL, irq, handler, thread_handler, 73 flags, name, arg)); 74 } 75 76 static inline int 77 devm_request_irq(struct device *dev, int irq, 78 irq_handler_t handler, unsigned long flags, const char *name, void *arg) 79 { 80 81 return (lkpi_request_irq(dev, irq, handler, NULL, flags, name, arg)); 82 } 83 84 static inline int 85 devm_request_threaded_irq(struct device *dev, int irq, 86 irq_handler_t handler, irq_handler_t thread_handler, 87 unsigned long flags, const char *name, void *arg) 88 { 89 90 return (lkpi_request_irq(dev, irq, handler, thread_handler, 91 flags, name, arg)); 92 } 93 94 static inline int 95 enable_irq(unsigned int irq) 96 { 97 return (lkpi_enable_irq(irq)); 98 } 99 100 static inline void 101 disable_irq(unsigned int irq) 102 { 103 lkpi_disable_irq(irq); 104 } 105 106 static inline void 107 disable_irq_nosync(unsigned int irq) 108 { 109 lkpi_disable_irq(irq); 110 } 111 112 static inline int 113 bind_irq_to_cpu(unsigned int irq, int cpu_id) 114 { 115 return (lkpi_bind_irq_to_cpu(irq, cpu_id)); 116 } 117 118 static inline void 119 free_irq(unsigned int irq, void *device) 120 { 121 lkpi_free_irq(irq, device); 122 } 123 124 static inline void 125 devm_free_irq(struct device *xdev, unsigned int irq, void *p) 126 { 127 lkpi_devm_free_irq(xdev, irq, p); 128 } 129 130 static inline int 131 irq_set_affinity_hint(int vector, const cpumask_t *mask) 132 { 133 int error; 134 135 if (mask != NULL) 136 error = intr_setaffinity(vector, CPU_WHICH_IRQ, __DECONST(cpumask_t *, mask)); 137 else 138 error = intr_setaffinity(vector, CPU_WHICH_IRQ, cpuset_root); 139 140 return (-error); 141 } 142 143 static inline struct msi_desc * 144 irq_get_msi_desc(unsigned int irq) 145 { 146 147 return (lkpi_pci_msi_desc_alloc(irq)); 148 } 149 150 static inline void 151 irq_set_status_flags(unsigned int irq __unused, unsigned long flags __unused) 152 { 153 } 154 155 /* 156 * LinuxKPI tasklet support 157 */ 158 struct tasklet_struct; 159 typedef void tasklet_func_t(unsigned long); 160 typedef void tasklet_callback_t(struct tasklet_struct *); 161 162 struct tasklet_struct { 163 TAILQ_ENTRY(tasklet_struct) entry; 164 tasklet_func_t *func; 165 /* Our "state" implementation is different. Avoid same name as Linux. */ 166 volatile u_int tasklet_state; 167 atomic_t count; 168 unsigned long data; 169 tasklet_callback_t *callback; 170 bool use_callback; 171 }; 172 173 #define DECLARE_TASKLET(_name, _func, _data) \ 174 struct tasklet_struct _name = { .func = (_func), .data = (_data) } 175 176 #define tasklet_hi_schedule(t) tasklet_schedule(t) 177 178 /* Some other compat code in the tree has this defined as well. */ 179 #define from_tasklet(_dev, _t, _field) \ 180 container_of(_t, typeof(*(_dev)), _field) 181 182 void tasklet_setup(struct tasklet_struct *, tasklet_callback_t *); 183 extern void tasklet_schedule(struct tasklet_struct *); 184 extern void tasklet_kill(struct tasklet_struct *); 185 extern void tasklet_init(struct tasklet_struct *, tasklet_func_t *, 186 unsigned long data); 187 extern void tasklet_enable(struct tasklet_struct *); 188 extern void tasklet_disable(struct tasklet_struct *); 189 extern void tasklet_disable_nosync(struct tasklet_struct *); 190 extern int tasklet_trylock(struct tasklet_struct *); 191 extern void tasklet_unlock(struct tasklet_struct *); 192 extern void tasklet_unlock_wait(struct tasklet_struct *ts); 193 #define tasklet_unlock_spin_wait(ts) tasklet_unlock_wait(ts) 194 195 #endif /* _LINUXKPI_LINUX_INTERRUPT_H_ */ 196