1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * Copyright (c) 2011 Jung-uk Kim <jkim@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * 6.5 : Interrupt handling 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/kernel.h> 38 #include <sys/bus.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/mutex.h> 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/rman.h> 45 46 #include <contrib/dev/acpica/include/acpi.h> 47 #include <contrib/dev/acpica/include/accommon.h> 48 49 #include <dev/acpica/acpivar.h> 50 51 #define _COMPONENT ACPI_OS_SERVICES 52 ACPI_MODULE_NAME("INTERRUPT") 53 54 MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt"); 55 56 struct acpi_intr { 57 SLIST_ENTRY(acpi_intr) ai_link; 58 struct resource *ai_irq; 59 int ai_rid; 60 void *ai_handle; 61 int ai_number; 62 ACPI_OSD_HANDLER ai_handler; 63 void *ai_context; 64 }; 65 static SLIST_HEAD(, acpi_intr) acpi_intr_list = 66 SLIST_HEAD_INITIALIZER(acpi_intr_list); 67 static struct mtx acpi_intr_lock; 68 69 static UINT32 InterruptOverride; 70 71 static void 72 acpi_intr_init(struct mtx *lock) 73 { 74 75 mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF); 76 } 77 78 SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init, 79 &acpi_intr_lock); 80 81 static int 82 acpi_intr_handler(void *arg) 83 { 84 struct acpi_intr *ai; 85 86 ai = arg; 87 KASSERT(ai != NULL && ai->ai_handler != NULL, 88 ("invalid ACPI interrupt handler")); 89 if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED) 90 return (FILTER_HANDLED); 91 return (FILTER_STRAY); 92 } 93 94 static void 95 acpi_intr_destroy(device_t dev, struct acpi_intr *ai) 96 { 97 98 if (ai->ai_handle != NULL) 99 bus_teardown_intr(dev, ai->ai_irq, ai->ai_handle); 100 if (ai->ai_irq != NULL) 101 bus_release_resource(dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq); 102 bus_delete_resource(dev, SYS_RES_IRQ, ai->ai_rid); 103 free(ai, M_ACPIINTR); 104 } 105 106 ACPI_STATUS 107 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 108 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 109 { 110 struct acpi_softc *sc; 111 struct acpi_intr *ai, *ap; 112 113 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 114 115 sc = devclass_get_softc(devclass_find("acpi"), 0); 116 KASSERT(sc != NULL && sc->acpi_dev != NULL, 117 ("can't find ACPI device to register interrupt")); 118 119 if (InterruptNumber > 255 || ServiceRoutine == NULL) 120 return_ACPI_STATUS (AE_BAD_PARAMETER); 121 122 ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO); 123 mtx_lock(&acpi_intr_lock); 124 SLIST_FOREACH(ap, &acpi_intr_list, ai_link) { 125 if (InterruptNumber == ap->ai_number || 126 (InterruptNumber == InterruptOverride && 127 InterruptNumber != AcpiGbl_FADT.SciInterrupt)) { 128 mtx_unlock(&acpi_intr_lock); 129 free(ai, M_ACPIINTR); 130 return_ACPI_STATUS (AE_ALREADY_EXISTS); 131 } 132 if (ai->ai_rid <= ap->ai_rid) 133 ai->ai_rid = ap->ai_rid + 1; 134 } 135 ai->ai_number = InterruptNumber; 136 ai->ai_handler = ServiceRoutine; 137 ai->ai_context = Context; 138 SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link); 139 mtx_unlock(&acpi_intr_lock); 140 141 /* 142 * If the MADT contained an interrupt override directive for the SCI, 143 * we use that value instead of the one from the FADT. 144 */ 145 if (InterruptOverride != 0 && 146 InterruptNumber == AcpiGbl_FADT.SciInterrupt) { 147 device_printf(sc->acpi_dev, 148 "Overriding SCI from IRQ %u to IRQ %u\n", 149 InterruptNumber, InterruptOverride); 150 InterruptNumber = InterruptOverride; 151 } 152 153 /* Set up the interrupt resource. */ 154 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid, 155 InterruptNumber, 1); 156 ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 157 &ai->ai_rid, RF_SHAREABLE | RF_ACTIVE); 158 if (ai->ai_irq == NULL) { 159 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 160 goto error; 161 } 162 if (bus_setup_intr(sc->acpi_dev, ai->ai_irq, 163 INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai, 164 &ai->ai_handle) != 0) { 165 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 166 goto error; 167 } 168 return_ACPI_STATUS (AE_OK); 169 170 error: 171 mtx_lock(&acpi_intr_lock); 172 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link); 173 mtx_unlock(&acpi_intr_lock); 174 acpi_intr_destroy(sc->acpi_dev, ai); 175 return_ACPI_STATUS (AE_ALREADY_EXISTS); 176 } 177 178 ACPI_STATUS 179 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, 180 ACPI_OSD_HANDLER ServiceRoutine) 181 { 182 struct acpi_softc *sc; 183 struct acpi_intr *ai; 184 185 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 186 187 sc = devclass_get_softc(devclass_find("acpi"), 0); 188 KASSERT(sc != NULL && sc->acpi_dev != NULL, 189 ("can't find ACPI device to deregister interrupt")); 190 191 if (InterruptNumber > 255 || ServiceRoutine == NULL) 192 return_ACPI_STATUS (AE_BAD_PARAMETER); 193 mtx_lock(&acpi_intr_lock); 194 SLIST_FOREACH(ai, &acpi_intr_list, ai_link) 195 if (InterruptNumber == ai->ai_number) { 196 if (ServiceRoutine != ai->ai_handler) { 197 mtx_unlock(&acpi_intr_lock); 198 return_ACPI_STATUS (AE_BAD_PARAMETER); 199 } 200 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link); 201 break; 202 } 203 mtx_unlock(&acpi_intr_lock); 204 if (ai == NULL) 205 return_ACPI_STATUS (AE_NOT_EXIST); 206 acpi_intr_destroy(sc->acpi_dev, ai); 207 return_ACPI_STATUS (AE_OK); 208 } 209 210 ACPI_STATUS 211 acpi_OverrideInterruptLevel(UINT32 InterruptNumber) 212 { 213 214 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 215 216 if (InterruptOverride != 0) 217 return_ACPI_STATUS (AE_ALREADY_EXISTS); 218 InterruptOverride = InterruptNumber; 219 return_ACPI_STATUS (AE_OK); 220 } 221