diff options
Diffstat (limited to 'drivers/acpi/acpica/evsci.c')
| -rw-r--r-- | drivers/acpi/acpica/evsci.c | 119 |
1 files changed, 74 insertions, 45 deletions
diff --git a/drivers/acpi/acpica/evsci.c b/drivers/acpi/acpica/evsci.c index b905acf7aacd..3915ff61412b 100644 --- a/drivers/acpi/acpica/evsci.c +++ b/drivers/acpi/acpica/evsci.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /******************************************************************************* * * Module Name: evsci - System Control Interrupt configuration and @@ -5,43 +6,6 @@ * ******************************************************************************/ -/* - * Copyright (C) 2000 - 2013, Intel Corp. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions, and the following disclaimer, - * without modification. - * 2. Redistributions in binary form must reproduce at minimum a disclaimer - * substantially similar to the "NO WARRANTY" disclaimer below - * ("Disclaimer") and any redistribution must be conditioned upon - * including a substantially similar Disclaimer requirement for further - * binary redistribution. - * 3. Neither the names of the above-listed copyright holders nor the names - * of any contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * NO WARRANTY - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING - * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGES. - */ - #include <acpi/acpi.h> #include "accommon.h" #include "acevents.h" @@ -54,6 +18,50 @@ static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context); /******************************************************************************* * + * FUNCTION: acpi_ev_sci_dispatch + * + * PARAMETERS: None + * + * RETURN: Status code indicates whether interrupt was handled. + * + * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers. + * + ******************************************************************************/ + +u32 acpi_ev_sci_dispatch(void) +{ + struct acpi_sci_handler_info *sci_handler; + acpi_cpu_flags flags; + u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; + + ACPI_FUNCTION_NAME(ev_sci_dispatch); + + /* Are there any host-installed SCI handlers? */ + + if (!acpi_gbl_sci_handler_list) { + return (int_status); + } + + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + + /* Invoke all host-installed SCI handlers */ + + sci_handler = acpi_gbl_sci_handler_list; + while (sci_handler) { + + /* Invoke the installed handler (at interrupt level) */ + + int_status |= sci_handler->address(sci_handler->context); + + sci_handler = sci_handler->next; + } + + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + return (int_status); +} + +/******************************************************************************* + * * FUNCTION: acpi_ev_sci_xrupt_handler * * PARAMETERS: context - Calling Context @@ -73,7 +81,7 @@ static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler); /* - * We are guaranteed by the ACPI CA initialization/shutdown code that + * We are guaranteed by the ACPICA initialization/shutdown code that * if this interrupt handler is installed, ACPI is enabled. */ @@ -89,6 +97,11 @@ static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context) */ interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); + /* Invoke all host-installed SCI handlers */ + + interrupt_handled |= acpi_ev_sci_dispatch(); + + acpi_sci_count++; return_UINT32(interrupt_handled); } @@ -112,14 +125,13 @@ u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context) ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler); /* - * We are guaranteed by the ACPI CA initialization/shutdown code that + * We are guaranteed by the ACPICA initialization/shutdown code that * if this interrupt handler is installed, ACPI is enabled. */ /* GPEs: Check for and dispatch any GPEs that have occurred */ interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list); - return_UINT32(interrupt_handled); } @@ -150,15 +162,15 @@ u32 acpi_ev_install_sci_handler(void) /****************************************************************************** * - * FUNCTION: acpi_ev_remove_sci_handler + * FUNCTION: acpi_ev_remove_all_sci_handlers * * PARAMETERS: none * - * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not + * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not * installed to begin with * * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be - * taken. + * taken. Remove all host-installed SCI handlers. * * Note: It doesn't seem important to disable all events or set the event * enable registers to their original values. The OS should disable @@ -167,11 +179,13 @@ u32 acpi_ev_install_sci_handler(void) * ******************************************************************************/ -acpi_status acpi_ev_remove_sci_handler(void) +acpi_status acpi_ev_remove_all_sci_handlers(void) { + struct acpi_sci_handler_info *sci_handler; + acpi_cpu_flags flags; acpi_status status; - ACPI_FUNCTION_TRACE(ev_remove_sci_handler); + ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers); /* Just let the OS remove the handler and disable the level */ @@ -179,6 +193,21 @@ acpi_status acpi_ev_remove_sci_handler(void) acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt, acpi_ev_sci_xrupt_handler); + if (!acpi_gbl_sci_handler_list) { + return (status); + } + + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + + /* Free all host-installed SCI handlers */ + + while (acpi_gbl_sci_handler_list) { + sci_handler = acpi_gbl_sci_handler_list; + acpi_gbl_sci_handler_list = sci_handler->next; + ACPI_FREE(sci_handler); + } + + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); return_ACPI_STATUS(status); } |