diff options
Diffstat (limited to 'drivers/acpi/events/evgpeblk.c')
| -rw-r--r-- | drivers/acpi/events/evgpeblk.c | 1227 |
1 files changed, 0 insertions, 1227 deletions
diff --git a/drivers/acpi/events/evgpeblk.c b/drivers/acpi/events/evgpeblk.c deleted file mode 100644 index 2a8d1856038..00000000000 --- a/drivers/acpi/events/evgpeblk.c +++ /dev/null @@ -1,1227 +0,0 @@ -/****************************************************************************** - * - * Module Name: evgpeblk - GPE block creation and initialization. - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h> -#include <acpi/acevents.h> -#include <acpi/acnamesp.h> - -#define _COMPONENT ACPI_EVENTS -ACPI_MODULE_NAME("evgpeblk") - -/* Local prototypes */ -static acpi_status -acpi_ev_save_method_info(acpi_handle obj_handle, - u32 level, void *obj_desc, void **return_value); - -static acpi_status -acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, - u32 level, void *info, void **return_value); - -static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 - interrupt_number); - -static acpi_status -acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); - -static acpi_status -acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, - u32 interrupt_number); - -static acpi_status -acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); - -/******************************************************************************* - * - * FUNCTION: acpi_ev_valid_gpe_event - * - * PARAMETERS: gpe_event_info - Info for this GPE - * - * RETURN: TRUE if the gpe_event 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. - * - ******************************************************************************/ - -u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) -{ - struct acpi_gpe_xrupt_info *gpe_xrupt_block; - struct acpi_gpe_block_info *gpe_block; - - ACPI_FUNCTION_ENTRY(); - - /* No need for spin lock since we are not changing any list elements */ - - /* Walk the GPE interrupt levels */ - - gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; - while (gpe_xrupt_block) { - gpe_block = gpe_xrupt_block->gpe_block_list_head; - - /* Walk the GPE blocks on this interrupt level */ - - while (gpe_block) { - if ((&gpe_block->event_info[0] <= gpe_event_info) && - (&gpe_block-> - event_info[((acpi_size) gpe_block-> - register_count) * 8] > - gpe_event_info)) { - return (TRUE); - } - - gpe_block = gpe_block->next; - } - - gpe_xrupt_block = gpe_xrupt_block->next; - } - - return (FALSE); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_walk_gpe_list - * - * PARAMETERS: gpe_walk_callback - Routine called for each GPE block - * Context - Value passed to callback - * - * RETURN: Status - * - * DESCRIPTION: Walk the GPE lists. - * - ******************************************************************************/ - -acpi_status -acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) -{ - struct acpi_gpe_block_info *gpe_block; - struct acpi_gpe_xrupt_info *gpe_xrupt_info; - acpi_status status = AE_OK; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(ev_walk_gpe_list); - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - - /* Walk the interrupt level descriptor list */ - - gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; - while (gpe_xrupt_info) { - - /* Walk all Gpe Blocks attached to this interrupt level */ - - gpe_block = gpe_xrupt_info->gpe_block_list_head; - while (gpe_block) { - - /* One callback per GPE block */ - - status = - gpe_walk_callback(gpe_xrupt_info, gpe_block, - context); - if (ACPI_FAILURE(status)) { - if (status == AE_CTRL_END) { /* Callback abort */ - status = AE_OK; - } - goto unlock_and_exit; - } - - gpe_block = gpe_block->next; - } - - gpe_xrupt_info = gpe_xrupt_info->next; - } - - unlock_and_exit: - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_delete_gpe_handlers - * - * PARAMETERS: gpe_xrupt_info - GPE Interrupt info - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Delete all Handler objects found in the GPE data structs. - * Used only prior to termination. - * - ******************************************************************************/ - -acpi_status -acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, - struct acpi_gpe_block_info *gpe_block, - void *context) -{ - struct acpi_gpe_event_info *gpe_event_info; - u32 i; - u32 j; - - ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); - - /* Examine each GPE Register within the block */ - - for (i = 0; i < gpe_block->register_count; i++) { - - /* Now look at the individual GPEs in this byte register */ - - for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { - gpe_event_info = - &gpe_block-> - event_info[((acpi_size) i * - ACPI_GPE_REGISTER_WIDTH) + j]; - - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_HANDLER) { - ACPI_FREE(gpe_event_info->dispatch.handler); - gpe_event_info->dispatch.handler = NULL; - gpe_event_info->flags &= - ~ACPI_GPE_DISPATCH_MASK; - } - } - } - - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_save_method_info - * - * PARAMETERS: Callback from walk_namespace - * - * RETURN: Status - * - * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a - * control method under the _GPE portion of the namespace. - * Extract the name and GPE type from the object, saving this - * information for quick lookup during GPE dispatch - * - * The name of each GPE control method is of the form: - * "_Lxx" or "_Exx" - * Where: - * L - means that the GPE is level triggered - * E - means that the GPE is edge triggered - * xx - is the GPE number [in HEX] - * - ******************************************************************************/ - -static acpi_status -acpi_ev_save_method_info(acpi_handle obj_handle, - u32 level, void *obj_desc, void **return_value) -{ - struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; - struct acpi_gpe_event_info *gpe_event_info; - u32 gpe_number; - char name[ACPI_NAME_SIZE + 1]; - u8 type; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_save_method_info); - - /* - * _Lxx and _Exx GPE method support - * - * 1) Extract the name from the object and convert to a string - */ - ACPI_MOVE_32_TO_32(name, - &((struct acpi_namespace_node *)obj_handle)->name. - integer); - name[ACPI_NAME_SIZE] = 0; - - /* - * 2) Edge/Level determination is based on the 2nd character - * of the method name - * - * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE - * if a _PRW object is found that points to this GPE. - */ - switch (name[1]) { - case 'L': - type = ACPI_GPE_LEVEL_TRIGGERED; - break; - - case 'E': - type = ACPI_GPE_EDGE_TRIGGERED; - break; - - default: - /* Unknown method type, just ignore it! */ - - ACPI_DEBUG_PRINT((ACPI_DB_LOAD, - "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)", - name)); - return_ACPI_STATUS(AE_OK); - } - - /* Convert the last two characters of the name to the GPE Number */ - - gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); - if (gpe_number == ACPI_UINT32_MAX) { - - /* Conversion failed; invalid method, just ignore it */ - - ACPI_DEBUG_PRINT((ACPI_DB_LOAD, - "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", - name)); - return_ACPI_STATUS(AE_OK); - } - - /* Ensure that we have a valid GPE number for this GPE block */ - - if ((gpe_number < gpe_block->block_base_number) || - (gpe_number >= - (gpe_block->block_base_number + - (gpe_block->register_count * 8)))) { - /* - * Not valid for this GPE block, just ignore it. However, it may be - * valid for a different GPE block, since GPE0 and GPE1 methods both - * appear under \_GPE. - */ - return_ACPI_STATUS(AE_OK); - } - - /* - * Now we can add this information to the gpe_event_info block for use - * during dispatch of this GPE. Default type is RUNTIME, although this may - * change when the _PRW methods are executed later. - */ - gpe_event_info = - &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; - - gpe_event_info->flags = (u8) - (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); - - gpe_event_info->dispatch.method_node = - (struct acpi_namespace_node *)obj_handle; - - /* Update enable mask, but don't enable the HW GPE as of yet */ - - status = acpi_ev_enable_gpe(gpe_event_info, FALSE); - - ACPI_DEBUG_PRINT((ACPI_DB_LOAD, - "Registered GPE method %s as GPE number 0x%.2X\n", - name, gpe_number)); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_match_prw_and_gpe - * - * PARAMETERS: Callback from walk_namespace - * - * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is - * not aborted on a single _PRW failure. - * - * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a - * Device. Run the _PRW method. If present, extract the GPE - * number and mark the GPE as a WAKE GPE. - * - ******************************************************************************/ - -static acpi_status -acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, - u32 level, void *info, void **return_value) -{ - struct acpi_gpe_walk_info *gpe_info = (void *)info; - struct acpi_namespace_node *gpe_device; - struct acpi_gpe_block_info *gpe_block; - struct acpi_namespace_node *target_gpe_device; - struct acpi_gpe_event_info *gpe_event_info; - union acpi_operand_object *pkg_desc; - union acpi_operand_object *obj_desc; - u32 gpe_number; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); - - /* Check for a _PRW method under this device */ - - status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, - ACPI_BTYPE_PACKAGE, &pkg_desc); - if (ACPI_FAILURE(status)) { - - /* Ignore all errors from _PRW, we don't want to abort the subsystem */ - - return_ACPI_STATUS(AE_OK); - } - - /* The returned _PRW package must have at least two elements */ - - if (pkg_desc->package.count < 2) { - goto cleanup; - } - - /* Extract pointers from the input context */ - - gpe_device = gpe_info->gpe_device; - gpe_block = gpe_info->gpe_block; - - /* - * The _PRW object must return a package, we are only interested in the - * first element - */ - obj_desc = pkg_desc->package.elements[0]; - - if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { - - /* Use FADT-defined GPE device (from definition of _PRW) */ - - target_gpe_device = acpi_gbl_fadt_gpe_device; - - /* Integer is the GPE number in the FADT described GPE blocks */ - - gpe_number = (u32) obj_desc->integer.value; - } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { - - /* Package contains a GPE reference and GPE number within a GPE block */ - - if ((obj_desc->package.count < 2) || - (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != - ACPI_TYPE_LOCAL_REFERENCE) - || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != - ACPI_TYPE_INTEGER)) { - goto cleanup; - } - - /* Get GPE block reference and decode */ - - target_gpe_device = - obj_desc->package.elements[0]->reference.node; - gpe_number = (u32) obj_desc->package.elements[1]->integer.value; - } else { - /* Unknown type, just ignore it */ - - goto cleanup; - } - - /* - * Is this GPE within this block? - * - * TRUE if and only if these conditions are true: - * 1) The GPE devices match. - * 2) The GPE index(number) is within the range of the Gpe Block - * associated with the GPE device. - */ - if ((gpe_device == target_gpe_device) && - (gpe_number >= gpe_block->block_base_number) && - (gpe_number < - gpe_block->block_base_number + (gpe_block->register_count * 8))) { - gpe_event_info = - &gpe_block->event_info[gpe_number - - gpe_block->block_base_number]; - - /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ - - gpe_event_info->flags &= - ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); - - status = - acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); - if (ACPI_FAILURE(status)) { - goto cleanup; - } - - status = - acpi_ev_update_gpe_enable_masks(gpe_event_info, - ACPI_GPE_DISABLE); - } - - cleanup: - acpi_ut_remove_reference(pkg_desc); - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_get_gpe_xrupt_block - * - * PARAMETERS: interrupt_number - 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. - * - ******************************************************************************/ - -static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 - interrupt_number) -{ - struct acpi_gpe_xrupt_info *next_gpe_xrupt; - struct acpi_gpe_xrupt_info *gpe_xrupt; - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); - - /* No need for lock since we are not changing any list elements here */ - - next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; - while (next_gpe_xrupt) { - if (next_gpe_xrupt->interrupt_number == interrupt_number) { - return_PTR(next_gpe_xrupt); - } - - next_gpe_xrupt = next_gpe_xrupt->next; - } - - /* Not found, must allocate a new xrupt descriptor */ - - gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); - if (!gpe_xrupt) { - return_PTR(NULL); - } - - gpe_xrupt->interrupt_number = interrupt_number; - - /* Install new interrupt descriptor with spin lock */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - if (acpi_gbl_gpe_xrupt_list_head) { - next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; - while (next_gpe_xrupt->next) { - next_gpe_xrupt = next_gpe_xrupt->next; - } - - next_gpe_xrupt->next = gpe_xrupt; - gpe_xrupt->previous = next_gpe_xrupt; - } else { - acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; - } - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - - /* Install new interrupt handler if not SCI_INT */ - - if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { - status = acpi_os_install_interrupt_handler(interrupt_number, - acpi_ev_gpe_xrupt_handler, - gpe_xrupt); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, - "Could not install GPE interrupt handler at level 0x%X", - interrupt_number)); - return_PTR(NULL); - } - } - - return_PTR(gpe_xrupt); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_delete_gpe_xrupt - * - * PARAMETERS: gpe_xrupt - A GPE interrupt info block - * - * RETURN: Status - * - * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated - * interrupt handler if not the SCI interrupt. - * - ******************************************************************************/ - -static acpi_status -acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) -{ - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); - - /* We never want to remove the SCI interrupt handler */ - - if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { - gpe_xrupt->gpe_block_list_head = NULL; - return_ACPI_STATUS(AE_OK); - } - - /* Disable this interrupt */ - - status = - acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, - acpi_ev_gpe_xrupt_handler); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Unlink the interrupt block with lock */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - if (gpe_xrupt->previous) { - gpe_xrupt->previous->next = gpe_xrupt->next; - } else { - /* No previous, update list head */ - - acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; - } - - if (gpe_xrupt->next) { - gpe_xrupt->next->previous = gpe_xrupt->previous; - } - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - - /* Free the block */ - - ACPI_FREE(gpe_xrupt); - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_install_gpe_block - * - * PARAMETERS: gpe_block - New GPE block - * interrupt_number - Xrupt to be associated with this - * GPE block - * - * RETURN: Status - * - * DESCRIPTION: Install new GPE block with mutex support - * - ******************************************************************************/ - -static acpi_status -acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, - u32 interrupt_number) -{ - struct acpi_gpe_block_info *next_gpe_block; - struct acpi_gpe_xrupt_info *gpe_xrupt_block; - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(ev_install_gpe_block); - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); - if (!gpe_xrupt_block) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - /* Install the new block at the end of the list with lock */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - if (gpe_xrupt_block->gpe_block_list_head) { - next_gpe_block = gpe_xrupt_block->gpe_block_list_head; - while (next_gpe_block->next) { - next_gpe_block = next_gpe_block->next; - } - - next_gpe_block->next = gpe_block; - gpe_block->previous = next_gpe_block; - } else { - gpe_xrupt_block->gpe_block_list_head = gpe_block; - } - - gpe_block->xrupt_block = gpe_xrupt_block; - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - - unlock_and_exit: - status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_delete_gpe_block - * - * PARAMETERS: gpe_block - Existing GPE block - * - * RETURN: Status - * - * DESCRIPTION: Remove a GPE block - * - ******************************************************************************/ - -acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) -{ - acpi_status status; - acpi_cpu_flags flags; - - ACPI_FUNCTION_TRACE(ev_install_gpe_block); - - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* Disable all GPEs in this block */ - - status = - acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); - - if (!gpe_block->previous && !gpe_block->next) { - - /* This is the last gpe_block on this interrupt */ - - status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - } else { - /* Remove the block on this interrupt with lock */ - - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - if (gpe_block->previous) { - gpe_block->previous->next = gpe_block->next; - } else { - gpe_block->xrupt_block->gpe_block_list_head = - gpe_block->next; - } - - if (gpe_block->next) { - gpe_block->next->previous = gpe_block->previous; - } - acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - } - - acpi_current_gpe_count -= - gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH; - - /* Free the gpe_block */ - - ACPI_FREE(gpe_block->register_info); - ACPI_FREE(gpe_block->event_info); - ACPI_FREE(gpe_block); - - unlock_and_exit: - status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_create_gpe_info_blocks - * - * PARAMETERS: gpe_block - New GPE block - * - * RETURN: Status - * - * DESCRIPTION: Create the register_info and event_info blocks for this GPE block - * - ******************************************************************************/ - -static acpi_status -acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) -{ - struct acpi_gpe_register_info *gpe_register_info = NULL; - struct acpi_gpe_event_info *gpe_event_info = NULL; - struct acpi_gpe_event_info *this_event; - struct acpi_gpe_register_info *this_register; - u32 i; - u32 j; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); - - /* Allocate the GPE register information block */ - - gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> - register_count * - sizeof(struct - acpi_gpe_register_info)); - if (!gpe_register_info) { - ACPI_ERROR((AE_INFO, - "Could not allocate the GpeRegisterInfo table")); - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* - * Allocate the GPE event_info block. There are eight distinct GPEs - * per register. Initialization to zeros is sufficient. - */ - gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> - register_count * - ACPI_GPE_REGISTER_WIDTH) * - sizeof(struct - acpi_gpe_event_info)); - if (!gpe_event_info) { - ACPI_ERROR((AE_INFO, - "Could not allocate the GpeEventInfo table")); - status = AE_NO_MEMORY; - goto error_exit; - } - - /* Save the new Info arrays in the GPE block */ - - gpe_block->register_info = gpe_register_info; - gpe_block->event_info = gpe_event_info; - - /* - * Initialize the GPE Register and Event structures. A goal of these - * tables is to hide the fact that there are two separate GPE register - * sets in a given GPE hardware block, the status registers occupy the - * first half, and the enable registers occupy the second half. - */ - this_register = gpe_register_info; - this_event = gpe_event_info; - - for (i = 0; i < gpe_block->register_count; i++) { - - /* Init the register_info for this GPE register (8 GPEs) */ - - this_register->base_gpe_number = - (u8) (gpe_block->block_base_number + - (i * ACPI_GPE_REGISTER_WIDTH)); - - this_register->status_address.address = - gpe_block->block_address.address + i; - - this_register->enable_address.address = - gpe_block->block_address.address + i + - gpe_block->register_count; - - this_register->status_address.space_id = - gpe_block->block_address.space_id; - this_register->enable_address.space_id = - gpe_block->block_address.space_id; - this_register->status_address.bit_width = - ACPI_GPE_REGISTER_WIDTH; - this_register->enable_address.bit_width = - ACPI_GPE_REGISTER_WIDTH; - this_register->status_address.bit_offset = 0; - this_register->enable_address.bit_offset = 0; - - /* Init the event_info for each GPE within this register */ - - for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { - this_event->gpe_number = - (u8) (this_register->base_gpe_number + j); - this_event->register_info = this_register; - this_event++; - } - - /* Disable all GPEs within this register */ - - status = acpi_write(0x00, &this_register->enable_address); - if (ACPI_FAILURE(status)) { - goto error_exit; - } - - /* Clear any pending GPE events within this register */ - - status = acpi_write(0xFF, &this_register->status_address); - if (ACPI_FAILURE(status)) { - goto error_exit; - } - - this_register++; - } - - return_ACPI_STATUS(AE_OK); - - error_exit: - if (gpe_register_info) { - ACPI_FREE(gpe_register_info); - } - if (gpe_event_info) { - ACPI_FREE(gpe_event_info); - } - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_create_gpe_block - * - * PARAMETERS: gpe_device - Handle to the parent GPE block - * gpe_block_address - Address and space_iD - * register_count - Number of GPE register pairs in the block - * gpe_block_base_number - Starting GPE number for the block - * interrupt_number - H/W interrupt for the block - * return_gpe_block - Where the new block descriptor is returned - * - * RETURN: Status - * - * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within - * the block are disabled at exit. - * Note: Assumes namespace is locked. - * - ******************************************************************************/ - -acpi_status -acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, - struct acpi_generic_address *gpe_block_address, - u32 register_count, - u8 gpe_block_base_number, - u32 interrupt_number, - struct acpi_gpe_block_info **return_gpe_block) -{ - acpi_status status; - struct acpi_gpe_block_info *gpe_block; - - ACPI_FUNCTION_TRACE(ev_create_gpe_block); - - if (!register_count) { - return_ACPI_STATUS(AE_OK); - } - - /* Allocate a new GPE block */ - - gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); - if (!gpe_block) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* Initialize the new GPE block */ - - gpe_block->node = gpe_device; - gpe_block->register_count = register_count; - gpe_block->block_base_number = gpe_block_base_number; - - ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, - sizeof(struct acpi_generic_address)); - - /* - * Create the register_info and event_info sub-structures - * Note: disables and clears all GPEs in the block - */ - status = acpi_ev_create_gpe_info_blocks(gpe_block); - if (ACPI_FAILURE(status)) { - ACPI_FREE(gpe_block); - return_ACPI_STATUS(status); - } - - /* Install the new block in the global lists */ - - status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); - if (ACPI_FAILURE(status)) { - ACPI_FREE(gpe_block); - return_ACPI_STATUS(status); - } - - /* Find all GPE methods (_Lxx, _Exx) for this block */ - - status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, - ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, - acpi_ev_save_method_info, gpe_block, - NULL); - - /* Return the new block */ - - if (return_gpe_block) { - (*return_gpe_block) = gpe_block; - } - - ACPI_DEBUG_PRINT((ACPI_DB_INIT, - "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", - (u32) gpe_block->block_base_number, - (u32) (gpe_block->block_base_number + - ((gpe_block->register_count * - ACPI_GPE_REGISTER_WIDTH) - 1)), - gpe_device->name.ascii, gpe_block->register_count, - interrupt_number)); - - /* Update global count of currently available GPEs */ - - acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH; - return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_initialize_gpe_block - * - * PARAMETERS: gpe_device - Handle to the parent GPE block - * gpe_block - Gpe Block info - * - * RETURN: Status - * - * DESCRIPTION: Initialize and enable a GPE block. First find and run any - * _PRT methods associated with the block, then enable the - * appropriate GPEs. - * Note: Assumes namespace is locked. - * - ******************************************************************************/ - -acpi_status -acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, - struct acpi_gpe_block_info *gpe_block) -{ - acpi_status status; - struct acpi_gpe_event_info *gpe_event_info; - struct acpi_gpe_walk_info gpe_info; - u32 wake_gpe_count; - u32 gpe_enabled_count; - u32 i; - u32 j; - - ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); - - /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ - - if (!gpe_block) { - return_ACPI_STATUS(AE_OK); - } - - /* - * Runtime option: Should wake GPEs be enabled at runtime? The default - * is no, they should only be enabled just as the machine goes to sleep. - */ - if (acpi_gbl_leave_wake_gpes_disabled) { - /* - * Differentiate runtime vs wake GPEs, via the _PRW control methods. - * Each GPE that has one or more _PRWs that reference it is by - * definition a wake GPE and will not be enabled while the machine - * is running. - */ - gpe_info.gpe_block = gpe_block; - gpe_info.gpe_device = gpe_device; - - status = - acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, - acpi_ev_match_prw_and_gpe, &gpe_info, - NULL); - } - - /* - * Enable all GPEs in this block that have these attributes: - * 1) are "runtime" or "run/wake" GPEs, and - * 2) have a corresponding _Lxx or _Exx method - * - * Any other GPEs within this block must be enabled via the acpi_enable_gpe() - * external interface. - */ - wake_gpe_count = 0; - gpe_enabled_count = 0; - - for (i = 0; i < gpe_block->register_count; i++) { - for (j = 0; j < 8; j++) { - - /* Get the info block for this particular GPE */ - - gpe_event_info = - &gpe_block-> - event_info[((acpi_size) i * - ACPI_GPE_REGISTER_WIDTH) + j]; - - if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_METHOD) - && (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { - gpe_enabled_count++; - } - - if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { - wake_gpe_count++; - } - } - } - - ACPI_DEBUG_PRINT((ACPI_DB_INIT, - "Found %u Wake, Enabled %u Runtime GPEs in this block\n", - wake_gpe_count, gpe_enabled_count)); - - /* Enable all valid runtime GPEs found above */ - - status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block, NULL); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", - gpe_block)); - } - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_gpe_initialize - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Initialize the GPE data structures - * - ******************************************************************************/ - -acpi_status acpi_ev_gpe_initialize(void) -{ - u32 register_count0 = 0; - u32 register_count1 = 0; - u32 gpe_number_max = 0; - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_gpe_initialize); - - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - /* - * Initialize the GPE Block(s) defined in the FADT - * - * Why the GPE register block lengths are divided by 2: From the ACPI Spec, - * section "General-Purpose Event Registers", we have: - * - * "Each register block contains two registers of equal length - * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the - * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN - * The length of the GPE1_STS and GPE1_EN registers is equal to - * half the GPE1_LEN. If a generic register block is not supported - * then its respective block pointer and block length values in the - * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need - * to be the same size." - */ - - /* - * Determine the maximum GPE number for this machine. - * - * Note: both GPE0 and GPE1 are optional, and either can exist without - * the other. - * - * If EITHER the register length OR the block address are zero, then that - * particular block is not supported. - */ - if (acpi_gbl_FADT.gpe0_block_length && - acpi_gbl_FADT.xgpe0_block.address) { - - /* GPE block 0 exists (has both length and address > 0) */ - - register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); - - gpe_number_max = - (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; - - /* Install GPE Block 0 */ - - status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, - &acpi_gbl_FADT.xgpe0_block, - register_count0, 0, - acpi_gbl_FADT.sci_interrupt, - &acpi_gbl_gpe_fadt_blocks[0]); - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Could not create GPE Block 0")); - } - } - - if (acpi_gbl_FADT.gpe1_block_length && - acpi_gbl_FADT.xgpe1_block.address) { - - /* GPE block 1 exists (has both length and address > 0) */ - - register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); - - /* Check for GPE0/GPE1 overlap (if both banks exist) */ - - if ((register_count0) && - (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { - ACPI_ERROR((AE_INFO, - "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", - gpe_number_max, acpi_gbl_FADT.gpe1_base, - acpi_gbl_FADT.gpe1_base + - ((register_count1 * - ACPI_GPE_REGISTER_WIDTH) - 1))); - - /* Ignore GPE1 block by setting the register count to zero */ - - register_count1 = 0; - } else { - /* Install GPE Block 1 */ - - status = - acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, - &acpi_gbl_FADT.xgpe1_block, - register_count1, - acpi_gbl_FADT.gpe1_base, - acpi_gbl_FADT. - sci_interrupt, - &acpi_gbl_gpe_fadt_blocks - [1]); - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Could not create GPE Block 1")); - } - - /* - * GPE0 and GPE1 do not have to be contiguous in the GPE number - * space. However, GPE0 always starts at GPE number zero. - */ - gpe_number_max = acpi_gbl_FADT.gpe1_base + - ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); - } - } - - /* Exit if there are no GPE registers */ - - if ((register_count0 + register_count1) == 0) { - - /* GPEs are not required by ACPI, this is OK */ - - ACPI_DEBUG_PRINT((ACPI_DB_INIT, - "There are no GPE blocks defined in the FADT\n")); - status = AE_OK; - goto cleanup; - } - - /* Check for Max GPE number out-of-range */ - - if (gpe_number_max > ACPI_GPE_MAX) { - ACPI_ERROR((AE_INFO, - "Maximum GPE number from FADT is too large: 0x%X", - gpe_number_max)); - status = AE_BAD_VALUE; - goto cleanup; - } - - cleanup: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - return_ACPI_STATUS(AE_OK); -} |