diff options
Diffstat (limited to 'drivers/acpi/acpica/evgpeblk.c')
| -rw-r--r-- | drivers/acpi/acpica/evgpeblk.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c new file mode 100644 index 000000000..f5298be42 --- /dev/null +++ b/drivers/acpi/acpica/evgpeblk.c @@ -0,0 +1,501 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/****************************************************************************** + * + * Module Name: evgpeblk - GPE block creation and initialization. + * + * Copyright (C) 2000 - 2020, Intel Corp. + * + *****************************************************************************/ + +#include <acpi/acpi.h> +#include "accommon.h" +#include "acevents.h" +#include "acnamesp.h" + +#define _COMPONENT ACPI_EVENTS +ACPI_MODULE_NAME("evgpeblk") +#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ +/* 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); + } + + status = + acpi_ev_get_gpe_xrupt_block(interrupt_number, &gpe_xrupt_block); + if (ACPI_FAILURE(status)) { + 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: + (void)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 (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + 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 = (u16) + (gpe_block->block_base_number + + (i * ACPI_GPE_REGISTER_WIDTH)); + + this_register->status_address.address = gpe_block->address + i; + + this_register->enable_address.address = + gpe_block->address + i + gpe_block->register_count; + + this_register->status_address.space_id = gpe_block->space_id; + this_register->enable_address.space_id = gpe_block->space_id; + + /* 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_gpe_write(0x00, &this_register->enable_address); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + + /* Clear any pending GPE events within this register */ + + status = acpi_hw_gpe_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, + u64 address, + u8 space_id, + u32 register_count, + u16 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); + } + + /* Validate the space_ID */ + + if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) && + (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) { + ACPI_ERROR((AE_INFO, + "Unsupported address space: 0x%X", space_id)); + return_ACPI_STATUS(AE_SUPPORT); + } + + if (space_id == ACPI_ADR_SPACE_SYSTEM_IO) { + status = acpi_hw_validate_io_block(address, + ACPI_GPE_REGISTER_WIDTH, + register_count); + if (ACPI_FAILURE(status)) + return_ACPI_STATUS(status); + } + + /* 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->address = address; + gpe_block->space_id = space_id; + gpe_block->node = gpe_device; + gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH); + gpe_block->initialized = FALSE; + gpe_block->register_count = register_count; + gpe_block->block_base_number = gpe_block_base_number; + + /* + * 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->register_info); + ACPI_FREE(gpe_block->event_info); + ACPI_FREE(gpe_block); + return_ACPI_STATUS(status); + } + + acpi_gbl_all_gpes_initialized = FALSE; + + /* Find all GPE methods (_Lxx or_Exx) for this block */ + + walk_info.gpe_block = gpe_block; + walk_info.gpe_device = gpe_device; + walk_info.execute_by_owner_id = FALSE; + + (void)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_RAW((ACPI_DB_INIT, + " Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\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, + interrupt_number == + acpi_gbl_FADT.sci_interrupt ? " (SCI)" : "")); + + /* 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: acpi_gpe_callback + * + * RETURN: Status + * + * DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have + * associated methods. + * Note: Assumes namespace is locked. + * + ******************************************************************************/ + +acpi_status +acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, + struct acpi_gpe_block_info *gpe_block, + void *context) +{ + acpi_status status; + struct acpi_gpe_event_info *gpe_event_info; + u32 gpe_enabled_count; + u32 gpe_index; + u32 i; + u32 j; + u8 *is_polling_needed = context; + ACPI_ERROR_ONLY(u32 gpe_number); + + ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); + + /* + * Ignore a null GPE block (e.g., if no GPE block 1 exists), and + * any GPE blocks that have been initialized already. + */ + if (!gpe_block || gpe_block->initialized) { + return_ACPI_STATUS(AE_OK); + } + + /* + * Enable all GPEs that have a corresponding method and have the + * ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block + * must be enabled via the acpi_enable_gpe() interface. + */ + gpe_enabled_count = 0; + + 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]; + ACPI_ERROR_ONLY(gpe_number = + gpe_block->block_base_number + + gpe_index); + gpe_event_info->flags |= ACPI_GPE_INITIALIZED; + + /* + * Ignore GPEs that have no corresponding _Lxx/_Exx method + * and GPEs that are used for wakeup + */ + if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != + ACPI_GPE_DISPATCH_METHOD) + || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { + continue; + } + + status = acpi_ev_add_gpe_reference(gpe_event_info, FALSE); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not enable GPE 0x%02X", + gpe_number)); + continue; + } + + gpe_event_info->flags |= ACPI_GPE_AUTO_ENABLED; + + if (is_polling_needed && + ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { + *is_polling_needed = TRUE; + } + + gpe_enabled_count++; + } + } + + if (gpe_enabled_count) { + ACPI_INFO(("Enabled %u GPEs in block %02X to %02X", + gpe_enabled_count, (u32)gpe_block->block_base_number, + (u32)(gpe_block->block_base_number + + (gpe_block->gpe_count - 1)))); + } + + gpe_block->initialized = TRUE; + + return_ACPI_STATUS(AE_OK); +} + +#endif /* !ACPI_REDUCED_HARDWARE */ |