diff options
Diffstat (limited to 'drivers/acpi/events/evgpeblk.c')
| -rw-r--r-- | drivers/acpi/events/evgpeblk.c | 1180 |
1 files changed, 0 insertions, 1180 deletions
diff --git a/drivers/acpi/events/evgpeblk.c b/drivers/acpi/events/evgpeblk.c deleted file mode 100644 index 84186a7d17b..00000000000 --- a/drivers/acpi/events/evgpeblk.c +++ /dev/null @@ -1,1180 +0,0 @@ -/****************************************************************************** - * - * Module Name: evgpeblk - GPE block creation and initialization. - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2005, R. Byron Moore - * 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/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_level); - -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_level); - -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 - * Flags - ACPI_NOT_ISR or ACPI_ISR - * - * RETURN: Status - * - * DESCRIPTION: Walk the GPE lists. - * - ******************************************************************************/ - -acpi_status -acpi_ev_walk_gpe_list ( - ACPI_GPE_CALLBACK gpe_walk_callback, - u32 flags) -{ - struct acpi_gpe_block_info *gpe_block; - struct acpi_gpe_xrupt_info *gpe_xrupt_info; - acpi_status status = AE_OK; - - - ACPI_FUNCTION_TRACE ("ev_walk_gpe_list"); - - - acpi_os_acquire_lock (acpi_gbl_gpe_lock, flags); - - /* 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); - if (ACPI_FAILURE (status)) { - 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) -{ - struct acpi_gpe_event_info *gpe_event_info; - acpi_native_uint i; - acpi_native_uint 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[(i * ACPI_GPE_REGISTER_WIDTH) + j]; - - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_HANDLER) { - ACPI_MEM_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_ERROR, - "Unknown GPE method type: %s (name not of form _Lxx or _Exx)\n", - 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_ERROR, - "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)\n", - 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 iff 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_level - 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_level) -{ - struct acpi_gpe_xrupt_info *next_gpe_xrupt; - struct acpi_gpe_xrupt_info *gpe_xrupt; - acpi_status status; - - - 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_level == interrupt_level) { - return_PTR (next_gpe_xrupt); - } - - next_gpe_xrupt = next_gpe_xrupt->next; - } - - /* Not found, must allocate a new xrupt descriptor */ - - gpe_xrupt = ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_xrupt_info)); - if (!gpe_xrupt) { - return_PTR (NULL); - } - - gpe_xrupt->interrupt_level = interrupt_level; - - /* Install new interrupt descriptor with spin lock */ - - acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); - 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, ACPI_NOT_ISR); - - /* Install new interrupt handler if not SCI_INT */ - - if (interrupt_level != acpi_gbl_FADT->sci_int) { - status = acpi_os_install_interrupt_handler (interrupt_level, - acpi_ev_gpe_xrupt_handler, gpe_xrupt); - if (ACPI_FAILURE (status)) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Could not install GPE interrupt handler at level 0x%X\n", - interrupt_level)); - 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_FUNCTION_TRACE ("ev_delete_gpe_xrupt"); - - - /* We never want to remove the SCI interrupt handler */ - - if (gpe_xrupt->interrupt_level == acpi_gbl_FADT->sci_int) { - gpe_xrupt->gpe_block_list_head = NULL; - return_ACPI_STATUS (AE_OK); - } - - /* Disable this interrupt */ - - status = acpi_os_remove_interrupt_handler (gpe_xrupt->interrupt_level, - acpi_ev_gpe_xrupt_handler); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - - /* Unlink the interrupt block with lock */ - - acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); - if (gpe_xrupt->previous) { - gpe_xrupt->previous->next = gpe_xrupt->next; - } - - if (gpe_xrupt->next) { - gpe_xrupt->next->previous = gpe_xrupt->previous; - } - acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); - - /* Free the block */ - - ACPI_MEM_FREE (gpe_xrupt); - return_ACPI_STATUS (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ev_install_gpe_block - * - * PARAMETERS: gpe_block - New GPE block - * interrupt_level - Level 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_level) -{ - struct acpi_gpe_block_info *next_gpe_block; - struct acpi_gpe_xrupt_info *gpe_xrupt_block; - acpi_status status; - - - 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_level); - if (!gpe_xrupt_block) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } - - /* Install the new block at the end of the list with lock */ - - acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); - 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, ACPI_NOT_ISR); - -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_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); - - 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 */ - - acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); - 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, ACPI_NOT_ISR); - } - - /* Free the gpe_block */ - - ACPI_MEM_FREE (gpe_block->register_info); - ACPI_MEM_FREE (gpe_block->event_info); - ACPI_MEM_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; - acpi_native_uint i; - acpi_native_uint j; - acpi_status status; - - - ACPI_FUNCTION_TRACE ("ev_create_gpe_info_blocks"); - - - /* Allocate the GPE register information block */ - - gpe_register_info = ACPI_MEM_CALLOCATE ( - (acpi_size) gpe_block->register_count * - sizeof (struct acpi_gpe_register_info)); - if (!gpe_register_info) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Could not allocate the gpe_register_info table\n")); - 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_MEM_CALLOCATE ( - ((acpi_size) gpe_block->register_count * - ACPI_GPE_REGISTER_WIDTH) * - sizeof (struct acpi_gpe_event_info)); - if (!gpe_event_info) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Could not allocate the gpe_event_info table\n")); - 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)); - - ACPI_STORE_ADDRESS (this_register->status_address.address, - (gpe_block->block_address.address - + i)); - - ACPI_STORE_ADDRESS (this_register->enable_address.address, - (gpe_block->block_address.address - + i - + gpe_block->register_count)); - - this_register->status_address.address_space_id = gpe_block->block_address.address_space_id; - this_register->enable_address.address_space_id = gpe_block->block_address.address_space_id; - this_register->status_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH; - this_register->enable_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH; - this_register->status_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH; - this_register->enable_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH; - - /* Init the event_info for each GPE within this register */ - - for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { - this_event->register_bit = acpi_gbl_decode_to8bit[j]; - this_event->register_info = this_register; - this_event++; - } - - /* - * Clear the status/enable registers. Note that status registers - * are cleared by writing a '1', while enable registers are cleared - * by writing a '0'. - */ - status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 0x00, - &this_register->enable_address); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 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_MEM_FREE (gpe_register_info); - } - if (gpe_event_info) { - ACPI_MEM_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_level - 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 - * - ******************************************************************************/ - -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_level, - struct acpi_gpe_block_info **return_gpe_block) -{ - struct acpi_gpe_block_info *gpe_block; - struct acpi_gpe_event_info *gpe_event_info; - acpi_native_uint i; - acpi_native_uint j; - u32 wake_gpe_count; - u32 gpe_enabled_count; - acpi_status status; - struct acpi_gpe_walk_info gpe_info; - - - ACPI_FUNCTION_TRACE ("ev_create_gpe_block"); - - - if (!register_count) { - return_ACPI_STATUS (AE_OK); - } - - /* Allocate a new GPE block */ - - gpe_block = ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_block_info)); - if (!gpe_block) { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - /* Initialize the new GPE block */ - - gpe_block->register_count = register_count; - gpe_block->block_base_number = gpe_block_base_number; - gpe_block->node = gpe_device; - - ACPI_MEMCPY (&gpe_block->block_address, gpe_block_address, - sizeof (struct acpi_generic_address)); - - /* Create the register_info and event_info sub-structures */ - - status = acpi_ev_create_gpe_info_blocks (gpe_block); - if (ACPI_FAILURE (status)) { - ACPI_MEM_FREE (gpe_block); - return_ACPI_STATUS (status); - } - - /* Install the new block in the global list(s) */ - - status = acpi_ev_install_gpe_block (gpe_block, interrupt_level); - if (ACPI_FAILURE (status)) { - ACPI_MEM_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); - - /* - * 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 are 1) "runtime" or "run/wake" GPEs, - * and 2) have a corresponding _Lxx or _Exx method. All other GPEs 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[(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++; - } - } - } - - /* Dump info about this 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_level)); - - /* Enable all valid GPEs found above */ - - status = acpi_hw_enable_runtime_gpe_block (NULL, gpe_block); - - ACPI_DEBUG_PRINT ((ACPI_DB_INIT, - "Found %u Wake, Enabled %u Runtime GPEs in this block\n", - wake_gpe_count, gpe_enabled_count)); - - /* Return the new block */ - - if (return_gpe_block) { - (*return_gpe_block) = gpe_block; - } - - return_ACPI_STATUS (AE_OK); -} - - -/******************************************************************************* - * - * 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_blk_len && - acpi_gbl_FADT->xgpe0_blk.address) { - /* GPE block 0 exists (has both length and address > 0) */ - - register_count0 = (u16) (acpi_gbl_FADT->gpe0_blk_len / 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_blk, register_count0, 0, - acpi_gbl_FADT->sci_int, &acpi_gbl_gpe_fadt_blocks[0]); - - if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (( - "Could not create GPE Block 0, %s\n", - acpi_format_exception (status))); - } - } - - if (acpi_gbl_FADT->gpe1_blk_len && - acpi_gbl_FADT->xgpe1_blk.address) { - /* GPE block 1 exists (has both length and address > 0) */ - - register_count1 = (u16) (acpi_gbl_FADT->gpe1_blk_len / 2); - - /* Check for GPE0/GPE1 overlap (if both banks exist) */ - - if ((register_count0) && - (gpe_number_max >= acpi_gbl_FADT->gpe1_base)) { - ACPI_REPORT_ERROR (( - "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n", - 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_blk, register_count1, - acpi_gbl_FADT->gpe1_base, - acpi_gbl_FADT->sci_int, &acpi_gbl_gpe_fadt_blocks[1]); - - if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (( - "Could not create GPE Block 1, %s\n", - acpi_format_exception (status))); - } - - /* - * 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_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n", - gpe_number_max)); - status = AE_BAD_VALUE; - goto cleanup; - } - -cleanup: - (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); - return_ACPI_STATUS (AE_OK); -} - - |