| /****************************************************************************** |
| * |
| * 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_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_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->gpe_count; |
| |
| /* 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->gpe_count * |
| 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; |
| struct acpi_gpe_walk_info walk_info; |
| |
| 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->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH); |
| 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 or_Exx) for this block */ |
| |
| walk_info.gpe_block = gpe_block; |
| walk_info.gpe_device = gpe_device; |
| walk_info.enable_this_gpe = FALSE; |
| walk_info.execute_by_owner_id = FALSE; |
| |
| status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
| ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, |
| acpi_ev_match_gpe_method, NULL, |
| &walk_info, 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->gpe_count - 1)), |
| gpe_device->name.ascii, gpe_block->register_count, |
| interrupt_number)); |
| |
| /* Update global count of currently available GPEs */ |
| |
| acpi_current_gpe_count += gpe_block->gpe_count; |
| 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 walk_info; |
| u32 wake_gpe_count; |
| u32 gpe_enabled_count; |
| u32 gpe_index; |
| u32 gpe_number; |
| 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. |
| */ |
| walk_info.gpe_block = gpe_block; |
| walk_info.gpe_device = gpe_device; |
| walk_info.execute_by_owner_id = FALSE; |
| |
| status = |
| acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
| ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
| acpi_ev_match_prw_and_gpe, NULL, |
| &walk_info, NULL); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "While executing _PRW methods")); |
| } |
| } |
| |
| /* |
| * Enable all GPEs that have a corresponding method and are not |
| * 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++) { |
| |
| /* Get the info block for this particular GPE */ |
| |
| gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j; |
| gpe_event_info = &gpe_block->event_info[gpe_index]; |
| gpe_number = gpe_index + gpe_block->block_base_number; |
| |
| /* |
| * If the GPE has already been enabled for runtime |
| * signaling, make sure it remains enabled, but do not |
| * increment its reference counter. |
| */ |
| if (gpe_event_info->runtime_count) { |
| acpi_set_gpe(gpe_device, gpe_number, |
| ACPI_GPE_ENABLE); |
| gpe_enabled_count++; |
| continue; |
| } |
| |
| if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { |
| wake_gpe_count++; |
| if (acpi_gbl_leave_wake_gpes_disabled) { |
| continue; |
| } |
| } |
| |
| /* Ignore GPEs that have no corresponding _Lxx/_Exx method */ |
| |
| if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) { |
| continue; |
| } |
| |
| /* Enable this GPE */ |
| |
| status = acpi_enable_gpe(gpe_device, gpe_number); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Could not enable GPE 0x%02X", |
| gpe_number)); |
| continue; |
| } |
| |
| gpe_enabled_count++; |
| } |
| } |
| |
| if (gpe_enabled_count || wake_gpe_count) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
| "Enabled %u Runtime GPEs, added %u Wake GPEs in this block\n", |
| gpe_enabled_count, wake_gpe_count)); |
| } |
| |
| return_ACPI_STATUS(AE_OK); |
| } |