diff options
Diffstat (limited to 'drivers/acpi/acpica/evxfgpe.c')
| -rw-r--r-- | drivers/acpi/acpica/evxfgpe.c | 174 |
1 files changed, 117 insertions, 57 deletions
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c index 52aaff3df56..cb534faf536 100644 --- a/drivers/acpi/acpica/evxfgpe.c +++ b/drivers/acpi/acpica/evxfgpe.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2011, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -41,6 +41,8 @@ * POSSIBILITY OF SUCH DAMAGES. */ +#define EXPORT_ACPI_INTERFACES + #include <acpi/acpi.h> #include "accommon.h" #include "acevents.h" @@ -49,7 +51,8 @@ #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evxfgpe") -/****************************************************************************** +#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ +/******************************************************************************* * * FUNCTION: acpi_update_all_gpes * @@ -170,6 +173,7 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) acpi_os_release_lock(acpi_gbl_gpe_lock, flags); return_ACPI_STATUS(status); } + ACPI_EXPORT_SYMBOL(acpi_disable_gpe) @@ -195,12 +199,12 @@ acpi_status acpi_setup_gpe_for_wake(acpi_handle wake_device, acpi_handle gpe_device, u32 gpe_number) { - acpi_status status = AE_BAD_PARAMETER; + acpi_status status; struct acpi_gpe_event_info *gpe_event_info; struct acpi_namespace_node *device_node; - struct acpi_gpe_notify_object *notify_object; + struct acpi_gpe_notify_info *notify; + struct acpi_gpe_notify_info *new_notify; acpi_cpu_flags flags; - u8 gpe_dispatch_mask; ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake); @@ -214,63 +218,96 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device, return_ACPI_STATUS(AE_BAD_PARAMETER); } + /* Handle root object case */ + + if (wake_device == ACPI_ROOT_OBJECT) { + device_node = acpi_gbl_root_node; + } else { + device_node = + ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); + } + + /* Validate wake_device is of type Device */ + + if (device_node->type != ACPI_TYPE_DEVICE) { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * Allocate a new notify object up front, in case it is needed. + * Memory allocation while holding a spinlock is a big no-no + * on some hosts. + */ + new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info)); + if (!new_notify) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); /* Ensure that we have a valid GPE number */ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); if (!gpe_event_info) { + status = AE_BAD_PARAMETER; goto unlock_and_exit; } - if (wake_device == ACPI_ROOT_OBJECT) { - goto out; - } - /* * If there is no method or handler for this GPE, then the - * wake_device will be notified whenever this GPE fires (aka - * "implicit notify") Note: The GPE is assumed to be + * wake_device will be notified whenever this GPE fires. This is + * known as an "implicit notify". Note: The GPE is assumed to be * level-triggered (for windows compatibility). */ - gpe_dispatch_mask = gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK; - if (gpe_dispatch_mask != ACPI_GPE_DISPATCH_NONE - && gpe_dispatch_mask != ACPI_GPE_DISPATCH_NOTIFY) { - goto out; - } - - /* Validate wake_device is of type Device */ - - device_node = ACPI_CAST_PTR(struct acpi_namespace_node, wake_device); - if (device_node->type != ACPI_TYPE_DEVICE) { - goto unlock_and_exit; + if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + ACPI_GPE_DISPATCH_NONE) { + /* + * This is the first device for implicit notify on this GPE. + * Just set the flags here, and enter the NOTIFY block below. + */ + gpe_event_info->flags = + (ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED); } - if (gpe_dispatch_mask == ACPI_GPE_DISPATCH_NONE) { - gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY | - ACPI_GPE_LEVEL_TRIGGERED); - gpe_event_info->dispatch.device.node = device_node; - gpe_event_info->dispatch.device.next = NULL; - } else { - /* There are multiple devices to notify implicitly. */ - - notify_object = ACPI_ALLOCATE_ZEROED(sizeof(*notify_object)); - if (!notify_object) { - status = AE_NO_MEMORY; - goto unlock_and_exit; + /* + * If we already have an implicit notify on this GPE, add + * this device to the notify list. + */ + if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + ACPI_GPE_DISPATCH_NOTIFY) { + + /* Ensure that the device is not already in the list */ + + notify = gpe_event_info->dispatch.notify_list; + while (notify) { + if (notify->device_node == device_node) { + status = AE_ALREADY_EXISTS; + goto unlock_and_exit; + } + notify = notify->next; } - notify_object->node = device_node; - notify_object->next = gpe_event_info->dispatch.device.next; - gpe_event_info->dispatch.device.next = notify_object; + /* Add this device to the notify list for this GPE */ + + new_notify->device_node = device_node; + new_notify->next = gpe_event_info->dispatch.notify_list; + gpe_event_info->dispatch.notify_list = new_notify; + new_notify = NULL; } - out: + /* Mark the GPE as a possible wake event */ + gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; status = AE_OK; - unlock_and_exit: +unlock_and_exit: acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + + /* Delete the notify object if it was not used above */ + + if (new_notify) { + ACPI_FREE(new_notify); + } return_ACPI_STATUS(status); } ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) @@ -281,7 +318,7 @@ ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) * * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 * gpe_number - GPE level within the GPE block - * Action - Enable or Disable + * action - Enable or Disable * * RETURN: Status * @@ -290,7 +327,8 @@ ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake) * ******************************************************************************/ -acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) +acpi_status +acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action) { acpi_status status = AE_OK; struct acpi_gpe_event_info *gpe_event_info; @@ -323,23 +361,25 @@ acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 ac goto unlock_and_exit; } - register_bit = - acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info); + register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); /* Perform the action */ switch (action) { case ACPI_GPE_ENABLE: + ACPI_SET_BIT(gpe_register_info->enable_for_wake, (u8)register_bit); break; case ACPI_GPE_DISABLE: + ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, (u8)register_bit); break; default: + ACPI_ERROR((AE_INFO, "%u, Invalid action", action)); status = AE_BAD_PARAMETER; break; @@ -397,8 +437,8 @@ ACPI_EXPORT_SYMBOL(acpi_clear_gpe) * * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 * gpe_number - GPE level within the GPE block - * event_status - Where the current status of the event will - * be returned + * event_status - Where the current status of the event + * will be returned * * RETURN: Status * @@ -432,7 +472,7 @@ acpi_get_gpe_status(acpi_handle gpe_device, if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) *event_status |= ACPI_EVENT_FLAG_HANDLE; - unlock_and_exit: +unlock_and_exit: acpi_os_release_lock(acpi_gbl_gpe_lock, flags); return_ACPI_STATUS(status); } @@ -506,7 +546,7 @@ ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes) * FUNCTION: acpi_install_gpe_block * * PARAMETERS: gpe_device - Handle to the parent GPE Block Device - * gpe_block_address - Address and space_iD + * gpe_block_address - Address and space_ID * register_count - Number of GPE register pairs in the block * interrupt_number - H/W interrupt for the block * @@ -534,7 +574,7 @@ acpi_install_gpe_block(acpi_handle gpe_device, status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { - return (status); + return_ACPI_STATUS(status); } node = acpi_ns_validate_handle(gpe_device); @@ -543,13 +583,26 @@ acpi_install_gpe_block(acpi_handle gpe_device, goto unlock_and_exit; } + /* Validate the parent device */ + + if (node->type != ACPI_TYPE_DEVICE) { + status = AE_TYPE; + goto unlock_and_exit; + } + + if (node->object) { + status = AE_ALREADY_EXISTS; + goto unlock_and_exit; + } + /* * For user-installed GPE Block Devices, the gpe_block_base_number * is always zero */ - status = - acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0, - interrupt_number, &gpe_block); + status = acpi_ev_create_gpe_block(node, gpe_block_address->address, + gpe_block_address->space_id, + register_count, 0, interrupt_number, + &gpe_block); if (ACPI_FAILURE(status)) { goto unlock_and_exit; } @@ -585,7 +638,7 @@ acpi_install_gpe_block(acpi_handle gpe_device, obj_desc->device.gpe_block = gpe_block; - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return_ACPI_STATUS(status); } @@ -617,7 +670,7 @@ acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { - return (status); + return_ACPI_STATUS(status); } node = acpi_ns_validate_handle(gpe_device); @@ -626,6 +679,13 @@ acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) goto unlock_and_exit; } + /* Validate the parent device */ + + if (node->type != ACPI_TYPE_DEVICE) { + status = AE_TYPE; + goto unlock_and_exit; + } + /* Get the device_object attached to the node */ obj_desc = acpi_ns_get_attached_object(node); @@ -640,7 +700,7 @@ acpi_status acpi_remove_gpe_block(acpi_handle gpe_device) obj_desc->device.gpe_block = NULL; } - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return_ACPI_STATUS(status); } @@ -651,7 +711,7 @@ ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) * * FUNCTION: acpi_get_gpe_device * - * PARAMETERS: Index - System GPE index (0-current_gpe_count) + * PARAMETERS: index - System GPE index (0-current_gpe_count) * gpe_device - Where the parent GPE Device is returned * * RETURN: Status @@ -661,8 +721,7 @@ ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block) * the FADT-defined gpe blocks. Otherwise, the GPE block device. * ******************************************************************************/ -acpi_status -acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) +acpi_status acpi_get_gpe_device(u32 index, acpi_handle * gpe_device) { struct acpi_gpe_device_info info; acpi_status status; @@ -694,3 +753,4 @@ acpi_get_gpe_device(u32 index, acpi_handle *gpe_device) } ACPI_EXPORT_SYMBOL(acpi_get_gpe_device) +#endif /* !ACPI_REDUCED_HARDWARE */ |