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/param.h> 34 #include <sys/kernel.h> 35 #include <sys/bus.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/mutex.h> 39 #include <machine/bus.h> 40 #include <machine/resource.h> 41 #include <sys/rman.h> 42 43 #include <contrib/dev/acpica/include/acpi.h> 44 #include <contrib/dev/acpica/include/accommon.h> 45 46 #include <dev/acpica/acpivar.h> 47 48 #define _COMPONENT ACPI_OS_SERVICES 49 ACPI_MODULE_NAME("INTERRUPT") 50 51 static MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt"); 52 53 struct acpi_intr { 54 SLIST_ENTRY(acpi_intr) ai_link; 55 struct resource *ai_irq; 56 int ai_rid; 57 void *ai_handle; 58 int ai_number; 59 ACPI_OSD_HANDLER ai_handler; 60 void *ai_context; 61 }; 62 static SLIST_HEAD(, acpi_intr) acpi_intr_list = 63 SLIST_HEAD_INITIALIZER(acpi_intr_list); 64 static struct mtx acpi_intr_lock; 65 66 static UINT32 InterruptOverride; 67 68 static void 69 acpi_intr_init(struct mtx *lock) 70 { 71 72 mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF); 73 } 74 75 SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init, 76 &acpi_intr_lock); 77 78 static int 79 acpi_intr_handler(void *arg) 80 { 81 struct acpi_intr *ai; 82 83 ai = arg; 84 KASSERT(ai != NULL && ai->ai_handler != NULL, 85 ("invalid ACPI interrupt handler")); 86 if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED) 87 return (FILTER_HANDLED); 88 return (FILTER_STRAY); 89 } 90 91 static void 92 acpi_intr_destroy(device_t dev, struct acpi_intr *ai) 93 { 94 95 if (ai->ai_handle != NULL) 96 bus_teardown_intr(dev, ai->ai_irq, ai->ai_handle); 97 if (ai->ai_irq != NULL) 98 bus_release_resource(dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq); 99 bus_delete_resource(dev, SYS_RES_IRQ, ai->ai_rid); 100 free(ai, M_ACPIINTR); 101 } 102 103 ACPI_STATUS 104 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 105 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 106 { 107 struct acpi_softc *sc; 108 struct acpi_intr *ai, *ap; 109 110 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 111 112 sc = devclass_get_softc(devclass_find("acpi"), 0); 113 KASSERT(sc != NULL && sc->acpi_dev != NULL, 114 ("can't find ACPI device to register interrupt")); 115 116 if (InterruptNumber > 255 || ServiceRoutine == NULL) 117 return_ACPI_STATUS (AE_BAD_PARAMETER); 118 119 ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO); 120 mtx_lock(&acpi_intr_lock); 121 SLIST_FOREACH(ap, &acpi_intr_list, ai_link) { 122 if (InterruptNumber == ap->ai_number || 123 (InterruptNumber == InterruptOverride && 124 InterruptNumber != AcpiGbl_FADT.SciInterrupt)) { 125 mtx_unlock(&acpi_intr_lock); 126 free(ai, M_ACPIINTR); 127 return_ACPI_STATUS (AE_ALREADY_EXISTS); 128 } 129 if (ai->ai_rid <= ap->ai_rid) 130 ai->ai_rid = ap->ai_rid + 1; 131 } 132 ai->ai_number = InterruptNumber; 133 ai->ai_handler = ServiceRoutine; 134 ai->ai_context = Context; 135 SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link); 136 mtx_unlock(&acpi_intr_lock); 137 138 /* 139 * If the MADT contained an interrupt override directive for the SCI, 140 * we use that value instead of the one from the FADT. 141 */ 142 if (InterruptOverride != 0 && 143 InterruptNumber == AcpiGbl_FADT.SciInterrupt) { 144 device_printf(sc->acpi_dev, 145 "Overriding SCI from IRQ %u to IRQ %u\n", 146 InterruptNumber, InterruptOverride); 147 InterruptNumber = InterruptOverride; 148 } 149 150 /* Set up the interrupt resource. */ 151 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid, 152 InterruptNumber, 1); 153 ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 154 &ai->ai_rid, RF_SHAREABLE | RF_ACTIVE); 155 if (ai->ai_irq == NULL) { 156 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 157 goto error; 158 } 159 if (bus_setup_intr(sc->acpi_dev, ai->ai_irq, 160 INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai, 161 &ai->ai_handle) != 0) { 162 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 163 goto error; 164 } 165 return_ACPI_STATUS (AE_OK); 166 167 error: 168 mtx_lock(&acpi_intr_lock); 169 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link); 170 mtx_unlock(&acpi_intr_lock); 171 acpi_intr_destroy(sc->acpi_dev, ai); 172 return_ACPI_STATUS (AE_ALREADY_EXISTS); 173 } 174 175 ACPI_STATUS 176 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, 177 ACPI_OSD_HANDLER ServiceRoutine) 178 { 179 struct acpi_softc *sc; 180 struct acpi_intr *ai; 181 182 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 183 184 sc = devclass_get_softc(devclass_find("acpi"), 0); 185 KASSERT(sc != NULL && sc->acpi_dev != NULL, 186 ("can't find ACPI device to deregister interrupt")); 187 188 if (InterruptNumber > 255 || ServiceRoutine == NULL) 189 return_ACPI_STATUS (AE_BAD_PARAMETER); 190 mtx_lock(&acpi_intr_lock); 191 SLIST_FOREACH(ai, &acpi_intr_list, ai_link) 192 if (InterruptNumber == ai->ai_number) { 193 if (ServiceRoutine != ai->ai_handler) { 194 mtx_unlock(&acpi_intr_lock); 195 return_ACPI_STATUS (AE_BAD_PARAMETER); 196 } 197 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link); 198 break; 199 } 200 mtx_unlock(&acpi_intr_lock); 201 if (ai == NULL) 202 return_ACPI_STATUS (AE_NOT_EXIST); 203 acpi_intr_destroy(sc->acpi_dev, ai); 204 return_ACPI_STATUS (AE_OK); 205 } 206 207 ACPI_STATUS 208 acpi_OverrideInterruptLevel(UINT32 InterruptNumber) 209 { 210 211 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 212 213 if (InterruptOverride != 0) 214 return_ACPI_STATUS (AE_ALREADY_EXISTS); 215 InterruptOverride = InterruptNumber; 216 return_ACPI_STATUS (AE_OK); 217 } 218