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Diffstat (limited to 'sys/contrib/dev/acpica/components/events/evgpeutil.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/events/evgpeutil.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/events/evgpeutil.c b/sys/contrib/dev/acpica/components/events/evgpeutil.c new file mode 100644 index 0000000..7b27b414 --- /dev/null +++ b/sys/contrib/dev/acpica/components/events/evgpeutil.c @@ -0,0 +1,425 @@ +/****************************************************************************** + * + * Module Name: evgpeutil - GPE utilities + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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 <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acevents.h> + +#define _COMPONENT ACPI_EVENTS + ACPI_MODULE_NAME ("evgpeutil") + + +#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ +/******************************************************************************* + * + * FUNCTION: AcpiEvWalkGpeList + * + * PARAMETERS: GpeWalkCallback - Routine called for each GPE block + * Context - Value passed to callback + * + * RETURN: Status + * + * DESCRIPTION: Walk the GPE lists. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvWalkGpeList ( + ACPI_GPE_CALLBACK GpeWalkCallback, + void *Context) +{ + ACPI_GPE_BLOCK_INFO *GpeBlock; + ACPI_GPE_XRUPT_INFO *GpeXruptInfo; + ACPI_STATUS Status = AE_OK; + ACPI_CPU_FLAGS Flags; + + + ACPI_FUNCTION_TRACE (EvWalkGpeList); + + + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + + /* Walk the interrupt level descriptor list */ + + GpeXruptInfo = AcpiGbl_GpeXruptListHead; + while (GpeXruptInfo) + { + /* Walk all Gpe Blocks attached to this interrupt level */ + + GpeBlock = GpeXruptInfo->GpeBlockListHead; + while (GpeBlock) + { + /* One callback per GPE block */ + + Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context); + if (ACPI_FAILURE (Status)) + { + if (Status == AE_CTRL_END) /* Callback abort */ + { + Status = AE_OK; + } + goto UnlockAndExit; + } + + GpeBlock = GpeBlock->Next; + } + + GpeXruptInfo = GpeXruptInfo->Next; + } + +UnlockAndExit: + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvValidGpeEvent + * + * PARAMETERS: GpeEventInfo - Info for this GPE + * + * RETURN: TRUE if the GpeEvent is valid + * + * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. + * Should be called only when the GPE lists are semaphore locked + * and not subject to change. + * + ******************************************************************************/ + +BOOLEAN +AcpiEvValidGpeEvent ( + ACPI_GPE_EVENT_INFO *GpeEventInfo) +{ + ACPI_GPE_XRUPT_INFO *GpeXruptBlock; + ACPI_GPE_BLOCK_INFO *GpeBlock; + + + ACPI_FUNCTION_ENTRY (); + + + /* No need for spin lock since we are not changing any list elements */ + + /* Walk the GPE interrupt levels */ + + GpeXruptBlock = AcpiGbl_GpeXruptListHead; + while (GpeXruptBlock) + { + GpeBlock = GpeXruptBlock->GpeBlockListHead; + + /* Walk the GPE blocks on this interrupt level */ + + while (GpeBlock) + { + if ((&GpeBlock->EventInfo[0] <= GpeEventInfo) && + (&GpeBlock->EventInfo[GpeBlock->GpeCount] > GpeEventInfo)) + { + return (TRUE); + } + + GpeBlock = GpeBlock->Next; + } + + GpeXruptBlock = GpeXruptBlock->Next; + } + + return (FALSE); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGetGpeDevice + * + * PARAMETERS: GPE_WALK_CALLBACK + * + * RETURN: Status + * + * DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE + * block device. NULL if the GPE is one of the FADT-defined GPEs. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvGetGpeDevice ( + ACPI_GPE_XRUPT_INFO *GpeXruptInfo, + ACPI_GPE_BLOCK_INFO *GpeBlock, + void *Context) +{ + ACPI_GPE_DEVICE_INFO *Info = Context; + + + /* Increment Index by the number of GPEs in this block */ + + Info->NextBlockBaseIndex += GpeBlock->GpeCount; + + if (Info->Index < Info->NextBlockBaseIndex) + { + /* + * The GPE index is within this block, get the node. Leave the node + * NULL for the FADT-defined GPEs + */ + if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE) + { + Info->GpeDevice = GpeBlock->Node; + } + + Info->Status = AE_OK; + return (AE_CTRL_END); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvGetGpeXruptBlock + * + * PARAMETERS: InterruptNumber - Interrupt for a GPE block + * + * RETURN: A GPE interrupt block + * + * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt + * block per unique interrupt level used for GPEs. Should be + * called only when the GPE lists are semaphore locked and not + * subject to change. + * + ******************************************************************************/ + +ACPI_GPE_XRUPT_INFO * +AcpiEvGetGpeXruptBlock ( + UINT32 InterruptNumber) +{ + ACPI_GPE_XRUPT_INFO *NextGpeXrupt; + ACPI_GPE_XRUPT_INFO *GpeXrupt; + ACPI_STATUS Status; + ACPI_CPU_FLAGS Flags; + + + ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock); + + + /* No need for lock since we are not changing any list elements here */ + + NextGpeXrupt = AcpiGbl_GpeXruptListHead; + while (NextGpeXrupt) + { + if (NextGpeXrupt->InterruptNumber == InterruptNumber) + { + return_PTR (NextGpeXrupt); + } + + NextGpeXrupt = NextGpeXrupt->Next; + } + + /* Not found, must allocate a new xrupt descriptor */ + + GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO)); + if (!GpeXrupt) + { + return_PTR (NULL); + } + + GpeXrupt->InterruptNumber = InterruptNumber; + + /* Install new interrupt descriptor with spin lock */ + + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + if (AcpiGbl_GpeXruptListHead) + { + NextGpeXrupt = AcpiGbl_GpeXruptListHead; + while (NextGpeXrupt->Next) + { + NextGpeXrupt = NextGpeXrupt->Next; + } + + NextGpeXrupt->Next = GpeXrupt; + GpeXrupt->Previous = NextGpeXrupt; + } + else + { + AcpiGbl_GpeXruptListHead = GpeXrupt; + } + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + + /* Install new interrupt handler if not SCI_INT */ + + if (InterruptNumber != AcpiGbl_FADT.SciInterrupt) + { + Status = AcpiOsInstallInterruptHandler (InterruptNumber, + AcpiEvGpeXruptHandler, GpeXrupt); + if (ACPI_FAILURE (Status)) + { + ACPI_ERROR ((AE_INFO, + "Could not install GPE interrupt handler at level 0x%X", + InterruptNumber)); + return_PTR (NULL); + } + } + + return_PTR (GpeXrupt); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvDeleteGpeXrupt + * + * PARAMETERS: GpeXrupt - A GPE interrupt info block + * + * RETURN: Status + * + * DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated + * interrupt handler if not the SCI interrupt. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvDeleteGpeXrupt ( + ACPI_GPE_XRUPT_INFO *GpeXrupt) +{ + ACPI_STATUS Status; + ACPI_CPU_FLAGS Flags; + + + ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt); + + + /* We never want to remove the SCI interrupt handler */ + + if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt) + { + GpeXrupt->GpeBlockListHead = NULL; + return_ACPI_STATUS (AE_OK); + } + + /* Disable this interrupt */ + + Status = AcpiOsRemoveInterruptHandler ( + GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Unlink the interrupt block with lock */ + + Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); + if (GpeXrupt->Previous) + { + GpeXrupt->Previous->Next = GpeXrupt->Next; + } + else + { + /* No previous, update list head */ + + AcpiGbl_GpeXruptListHead = GpeXrupt->Next; + } + + if (GpeXrupt->Next) + { + GpeXrupt->Next->Previous = GpeXrupt->Previous; + } + AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); + + /* Free the block */ + + ACPI_FREE (GpeXrupt); + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiEvDeleteGpeHandlers + * + * PARAMETERS: GpeXruptInfo - GPE Interrupt info + * GpeBlock - Gpe Block info + * + * RETURN: Status + * + * DESCRIPTION: Delete all Handler objects found in the GPE data structs. + * Used only prior to termination. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiEvDeleteGpeHandlers ( + ACPI_GPE_XRUPT_INFO *GpeXruptInfo, + ACPI_GPE_BLOCK_INFO *GpeBlock, + void *Context) +{ + ACPI_GPE_EVENT_INFO *GpeEventInfo; + UINT32 i; + UINT32 j; + + + ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers); + + + /* Examine each GPE Register within the block */ + + for (i = 0; i < GpeBlock->RegisterCount; i++) + { + /* Now look at the individual GPEs in this byte register */ + + for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) + { + GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i * + ACPI_GPE_REGISTER_WIDTH) + j]; + + if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == + ACPI_GPE_DISPATCH_HANDLER) + { + ACPI_FREE (GpeEventInfo->Dispatch.Handler); + GpeEventInfo->Dispatch.Handler = NULL; + GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; + } + } + } + + return_ACPI_STATUS (AE_OK); +} + +#endif /* !ACPI_REDUCED_HARDWARE */ |
