v4.19.13 snapshot.
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
new file mode 100644
index 0000000..b253063
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -0,0 +1,487 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: evgpeblk - GPE block creation and initialization.
+ *
+ * Copyright (C) 2000 - 2018, 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 (!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;
+ 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,
+ 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);
+ }
+
+ /* 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;
+
+ 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_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);
+ 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 */