| /****************************************************************************** |
| * |
| * Module Name: evgpeblk - GPE block creation and initialization. |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2010, 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" |
| #include "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_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. |
| */ |
| gpe_event_info = |
| &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; |
| |
| gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD); |
| |
| gpe_event_info->dispatch.method_node = |
| (struct acpi_namespace_node *)obj_handle; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
| "Registered GPE method %s as GPE number 0x%.2X\n", |
| name, gpe_number)); |
| return_ACPI_STATUS(AE_OK); |
| } |
| |
| /******************************************************************************* |
| * |
| * 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 (obj_desc->common.type == 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 (obj_desc->common.type == ACPI_TYPE_PACKAGE) { |
| |
| /* Package contains a GPE reference and GPE number within a GPE block */ |
| |
| if ((obj_desc->package.count < 2) || |
| ((obj_desc->package.elements[0])->common.type != |
| ACPI_TYPE_LOCAL_REFERENCE) || |
| ((obj_desc->package.elements[1])->common.type != |
| 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]; |
| |
| gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
| } |
| |
| 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_hw_write(0x00, &this_register->enable_address); |
| if (ACPI_FAILURE(status)) { |
| goto error_exit; |
| } |
| |
| /* Clear any pending GPE events within this register */ |
| |
| status = acpi_hw_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, NULL, |
| 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) |
| { |
| 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; |
| |
| acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
| ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
| acpi_ev_match_prw_and_gpe, NULL, |
| &gpe_info, NULL); |
| } |
| |
| /* |
| * Enable all GPEs that have a corresponding method and aren't |
| * capable of generating wakeups. Any other GPEs within this block |
| * must be enabled via the acpi_enable_gpe() interface. |
| */ |
| wake_gpe_count = 0; |
| gpe_enabled_count = 0; |
| if (gpe_device == acpi_gbl_fadt_gpe_device) |
| gpe_device = NULL; |
| |
| for (i = 0; i < gpe_block->register_count; i++) { |
| for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { |
| acpi_status status; |
| acpi_size gpe_index; |
| int gpe_number; |
| |
| /* Get the info block for this particular GPE */ |
| gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j; |
| gpe_event_info = &gpe_block->event_info[gpe_index]; |
| |
| if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { |
| wake_gpe_count++; |
| if (acpi_gbl_leave_wake_gpes_disabled) |
| continue; |
| } |
| |
| if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) |
| continue; |
| |
| gpe_number = gpe_index + gpe_block->block_base_number; |
| status = acpi_enable_gpe(gpe_device, gpe_number, |
| ACPI_GPE_TYPE_RUNTIME); |
| if (ACPI_FAILURE(status)) |
| ACPI_ERROR((AE_INFO, |
| "Failed to enable GPE %02X\n", |
| gpe_number)); |
| else |
| gpe_enabled_count++; |
| } |
| } |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| "Found %u Wake, Enabled %u Runtime GPEs in this block\n", |
| wake_gpe_count, gpe_enabled_count)); |
| |
| 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_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 %u) overlaps the GPE1 block " |
| "(GPE %u to %u) - 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); |
| } |