| 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: evsci - System Control Interrupt configuration and |
| 4 | * legacy to ACPI mode state transition functions |
| 5 | * |
| 6 | ******************************************************************************/ |
| 7 | |
| 8 | /* |
| 9 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
| 45 | #include "acpi.h" |
| 46 | #include "accommon.h" |
| 47 | #include "acevents.h" |
| 48 | |
| 49 | |
| 50 | #define _COMPONENT ACPI_EVENTS |
| 51 | ACPI_MODULE_NAME ("evsci" ) |
| 52 | |
| 53 | #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
| 54 | |
| 55 | /* Local prototypes */ |
| 56 | |
| 57 | static UINT32 ACPI_SYSTEM_XFACE |
| 58 | AcpiEvSciXruptHandler ( |
| 59 | void *Context); |
| 60 | |
| 61 | |
| 62 | /******************************************************************************* |
| 63 | * |
| 64 | * FUNCTION: AcpiEvSciDispatch |
| 65 | * |
| 66 | * PARAMETERS: None |
| 67 | * |
| 68 | * RETURN: Status code indicates whether interrupt was handled. |
| 69 | * |
| 70 | * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers. |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | UINT32 |
| 75 | AcpiEvSciDispatch ( |
| 76 | void) |
| 77 | { |
| 78 | ACPI_SCI_HANDLER_INFO *SciHandler; |
| 79 | ACPI_CPU_FLAGS Flags; |
| 80 | UINT32 IntStatus = ACPI_INTERRUPT_NOT_HANDLED; |
| 81 | |
| 82 | |
| 83 | ACPI_FUNCTION_NAME (EvSciDispatch); |
| 84 | |
| 85 | |
| 86 | /* Are there any host-installed SCI handlers? */ |
| 87 | |
| 88 | if (!AcpiGbl_SciHandlerList) |
| 89 | { |
| 90 | return (IntStatus); |
| 91 | } |
| 92 | |
| 93 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 94 | |
| 95 | /* Invoke all host-installed SCI handlers */ |
| 96 | |
| 97 | SciHandler = AcpiGbl_SciHandlerList; |
| 98 | while (SciHandler) |
| 99 | { |
| 100 | /* Invoke the installed handler (at interrupt level) */ |
| 101 | |
| 102 | IntStatus |= SciHandler->Address ( |
| 103 | SciHandler->Context); |
| 104 | |
| 105 | SciHandler = SciHandler->Next; |
| 106 | } |
| 107 | |
| 108 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 109 | return (IntStatus); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | /******************************************************************************* |
| 114 | * |
| 115 | * FUNCTION: AcpiEvSciXruptHandler |
| 116 | * |
| 117 | * PARAMETERS: Context - Calling Context |
| 118 | * |
| 119 | * RETURN: Status code indicates whether interrupt was handled. |
| 120 | * |
| 121 | * DESCRIPTION: Interrupt handler that will figure out what function or |
| 122 | * control method to call to deal with a SCI. |
| 123 | * |
| 124 | ******************************************************************************/ |
| 125 | |
| 126 | static UINT32 ACPI_SYSTEM_XFACE |
| 127 | AcpiEvSciXruptHandler ( |
| 128 | void *Context) |
| 129 | { |
| 130 | ACPI_GPE_XRUPT_INFO *GpeXruptList = Context; |
| 131 | UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED; |
| 132 | |
| 133 | |
| 134 | ACPI_FUNCTION_TRACE (EvSciXruptHandler); |
| 135 | |
| 136 | |
| 137 | /* |
| 138 | * We are guaranteed by the ACPICA initialization/shutdown code that |
| 139 | * if this interrupt handler is installed, ACPI is enabled. |
| 140 | */ |
| 141 | |
| 142 | /* |
| 143 | * Fixed Events: |
| 144 | * Check for and dispatch any Fixed Events that have occurred |
| 145 | */ |
| 146 | InterruptHandled |= AcpiEvFixedEventDetect (); |
| 147 | |
| 148 | /* |
| 149 | * General Purpose Events: |
| 150 | * Check for and dispatch any GPEs that have occurred |
| 151 | */ |
| 152 | InterruptHandled |= AcpiEvGpeDetect (GpeXruptList); |
| 153 | |
| 154 | /* Invoke all host-installed SCI handlers */ |
| 155 | |
| 156 | InterruptHandled |= AcpiEvSciDispatch (); |
| 157 | |
| 158 | AcpiSciCount++; |
| 159 | return_UINT32 (InterruptHandled); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /******************************************************************************* |
| 164 | * |
| 165 | * FUNCTION: AcpiEvGpeXruptHandler |
| 166 | * |
| 167 | * PARAMETERS: Context - Calling Context |
| 168 | * |
| 169 | * RETURN: Status code indicates whether interrupt was handled. |
| 170 | * |
| 171 | * DESCRIPTION: Handler for GPE Block Device interrupts |
| 172 | * |
| 173 | ******************************************************************************/ |
| 174 | |
| 175 | UINT32 ACPI_SYSTEM_XFACE |
| 176 | AcpiEvGpeXruptHandler ( |
| 177 | void *Context) |
| 178 | { |
| 179 | ACPI_GPE_XRUPT_INFO *GpeXruptList = Context; |
| 180 | UINT32 InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED; |
| 181 | |
| 182 | |
| 183 | ACPI_FUNCTION_TRACE (EvGpeXruptHandler); |
| 184 | |
| 185 | |
| 186 | /* |
| 187 | * We are guaranteed by the ACPICA initialization/shutdown code that |
| 188 | * if this interrupt handler is installed, ACPI is enabled. |
| 189 | */ |
| 190 | |
| 191 | /* GPEs: Check for and dispatch any GPEs that have occurred */ |
| 192 | |
| 193 | InterruptHandled |= AcpiEvGpeDetect (GpeXruptList); |
| 194 | return_UINT32 (InterruptHandled); |
| 195 | } |
| 196 | |
| 197 | |
| 198 | /****************************************************************************** |
| 199 | * |
| 200 | * FUNCTION: AcpiEvInstallSciHandler |
| 201 | * |
| 202 | * PARAMETERS: none |
| 203 | * |
| 204 | * RETURN: Status |
| 205 | * |
| 206 | * DESCRIPTION: Installs SCI handler. |
| 207 | * |
| 208 | ******************************************************************************/ |
| 209 | |
| 210 | UINT32 |
| 211 | AcpiEvInstallSciHandler ( |
| 212 | void) |
| 213 | { |
| 214 | UINT32 Status = AE_OK; |
| 215 | |
| 216 | |
| 217 | ACPI_FUNCTION_TRACE (EvInstallSciHandler); |
| 218 | |
| 219 | |
| 220 | Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, |
| 221 | AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead); |
| 222 | return_ACPI_STATUS (Status); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | /****************************************************************************** |
| 227 | * |
| 228 | * FUNCTION: AcpiEvRemoveAllSciHandlers |
| 229 | * |
| 230 | * PARAMETERS: none |
| 231 | * |
| 232 | * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not |
| 233 | * installed to begin with |
| 234 | * |
| 235 | * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be |
| 236 | * taken. Remove all host-installed SCI handlers. |
| 237 | * |
| 238 | * Note: It doesn't seem important to disable all events or set the event |
| 239 | * enable registers to their original values. The OS should disable |
| 240 | * the SCI interrupt level when the handler is removed, so no more |
| 241 | * events will come in. |
| 242 | * |
| 243 | ******************************************************************************/ |
| 244 | |
| 245 | ACPI_STATUS |
| 246 | AcpiEvRemoveAllSciHandlers ( |
| 247 | void) |
| 248 | { |
| 249 | ACPI_SCI_HANDLER_INFO *SciHandler; |
| 250 | ACPI_CPU_FLAGS Flags; |
| 251 | ACPI_STATUS Status; |
| 252 | |
| 253 | |
| 254 | ACPI_FUNCTION_TRACE (EvRemoveAllSciHandlers); |
| 255 | |
| 256 | |
| 257 | /* Just let the OS remove the handler and disable the level */ |
| 258 | |
| 259 | Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt, |
| 260 | AcpiEvSciXruptHandler); |
| 261 | |
| 262 | if (!AcpiGbl_SciHandlerList) |
| 263 | { |
| 264 | return (Status); |
| 265 | } |
| 266 | |
| 267 | Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); |
| 268 | |
| 269 | /* Free all host-installed SCI handlers */ |
| 270 | |
| 271 | while (AcpiGbl_SciHandlerList) |
| 272 | { |
| 273 | SciHandler = AcpiGbl_SciHandlerList; |
| 274 | AcpiGbl_SciHandlerList = SciHandler->Next; |
| 275 | ACPI_FREE (SciHandler); |
| 276 | } |
| 277 | |
| 278 | AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); |
| 279 | return_ACPI_STATUS (Status); |
| 280 | } |
| 281 | |
| 282 | #endif /* !ACPI_REDUCED_HARDWARE */ |
| 283 | |