Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 487 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
new file mode 100644
index 000000000..8d96270ed
--- /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, 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 */