diff options
Diffstat (limited to 'drivers/acpi/events/evgpeblk.c')
| -rw-r--r-- | drivers/acpi/events/evgpeblk.c | 1141 |
1 files changed, 1141 insertions, 0 deletions
diff --git a/drivers/acpi/events/evgpeblk.c b/drivers/acpi/events/evgpeblk.c new file mode 100644 index 000000000000..00d981f53c6a --- /dev/null +++ b/drivers/acpi/events/evgpeblk.c @@ -0,0 +1,1141 @@ +/****************************************************************************** + * + * 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") + + +/******************************************************************************* + * + * 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 spin 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 for this interrupt 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); +} + + |