ACPICA: Source restructuring: split large files into 8 new files.

Created logical splits for eight new files. Improves modularity
and configurability.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 529 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/evhandler.c b/drivers/acpi/acpica/evhandler.c
new file mode 100644
index 000000000000..95e52585bb9b
--- /dev/null
+++ b/drivers/acpi/acpica/evhandler.c
@@ -0,0 +1,529 @@
+/******************************************************************************
+ *
+ * Module Name: evhandler - Support for Address Space handlers
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, 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"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evhandler")
+
+/* Local prototypes */
+static acpi_status
+acpi_ev_install_handler(acpi_handle obj_handle,
+                        u32 level, void *context, void **return_value);
+
+/* These are the address spaces that will get default handlers */
+
+u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
+        ACPI_ADR_SPACE_SYSTEM_MEMORY,
+        ACPI_ADR_SPACE_SYSTEM_IO,
+        ACPI_ADR_SPACE_PCI_CONFIG,
+        ACPI_ADR_SPACE_DATA_TABLE
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_region_handlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs the core subsystem default address space handlers.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_install_region_handlers(void)
+{
+        acpi_status status;
+        u32 i;
+
+        ACPI_FUNCTION_TRACE(ev_install_region_handlers);
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /*
+         * All address spaces (PCI Config, EC, SMBus) are scope dependent and
+         * registration must occur for a specific device.
+         *
+         * In the case of the system memory and IO address spaces there is
+         * currently no device associated with the address space. For these we
+         * use the root.
+         *
+         * We install the default PCI config space handler at the root so that
+         * this space is immediately available even though the we have not
+         * enumerated all the PCI Root Buses yet. This is to conform to the ACPI
+         * specification which states that the PCI config space must be always
+         * available -- even though we are nowhere near ready to find the PCI root
+         * buses at this point.
+         *
+         * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
+         * has already been installed (via acpi_install_address_space_handler).
+         * Similar for AE_SAME_HANDLER.
+         */
+        for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) {
+                status = acpi_ev_install_space_handler(acpi_gbl_root_node,
+                                                       acpi_gbl_default_address_spaces
+                                                       [i],
+                                                       ACPI_DEFAULT_HANDLER,
+                                                       NULL, NULL);
+                switch (status) {
+                case AE_OK:
+                case AE_SAME_HANDLER:
+                case AE_ALREADY_EXISTS:
+
+                        /* These exceptions are all OK */
+
+                        status = AE_OK;
+                        break;
+
+                default:
+
+                        goto unlock_and_exit;
+                }
+        }
+
+      unlock_and_exit:
+        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_has_default_handler
+ *
+ * PARAMETERS:  node                - Namespace node for the device
+ *              space_id            - The address space ID
+ *
+ * RETURN:      TRUE if default handler is installed, FALSE otherwise
+ *
+ * DESCRIPTION: Check if the default handler is installed for the requested
+ *              space ID.
+ *
+ ******************************************************************************/
+
+u8
+acpi_ev_has_default_handler(struct acpi_namespace_node *node,
+                            acpi_adr_space_type space_id)
+{
+        union acpi_operand_object *obj_desc;
+        union acpi_operand_object *handler_obj;
+
+        /* Must have an existing internal object */
+
+        obj_desc = acpi_ns_get_attached_object(node);
+        if (obj_desc) {
+                handler_obj = obj_desc->device.handler;
+
+                /* Walk the linked list of handlers for this object */
+
+                while (handler_obj) {
+                        if (handler_obj->address_space.space_id == space_id) {
+                                if (handler_obj->address_space.handler_flags &
+                                    ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
+                                        return (TRUE);
+                                }
+                        }
+
+                        handler_obj = handler_obj->address_space.next;
+                }
+        }
+
+        return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_handler
+ *
+ * PARAMETERS:  walk_namespace callback
+ *
+ * DESCRIPTION: This routine installs an address handler into objects that are
+ *              of type Region or Device.
+ *
+ *              If the Object is a Device, and the device has a handler of
+ *              the same type then the search is terminated in that branch.
+ *
+ *              This is because the existing handler is closer in proximity
+ *              to any more regions than the one we are trying to install.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ev_install_handler(acpi_handle obj_handle,
+                        u32 level, void *context, void **return_value)
+{
+        union acpi_operand_object *handler_obj;
+        union acpi_operand_object *next_handler_obj;
+        union acpi_operand_object *obj_desc;
+        struct acpi_namespace_node *node;
+        acpi_status status;
+
+        ACPI_FUNCTION_NAME(ev_install_handler);
+
+        handler_obj = (union acpi_operand_object *)context;
+
+        /* Parameter validation */
+
+        if (!handler_obj) {
+                return (AE_OK);
+        }
+
+        /* Convert and validate the device handle */
+
+        node = acpi_ns_validate_handle(obj_handle);
+        if (!node) {
+                return (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * We only care about regions and objects that are allowed to have
+         * address space handlers
+         */
+        if ((node->type != ACPI_TYPE_DEVICE) &&
+            (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) {
+                return (AE_OK);
+        }
+
+        /* Check for an existing internal object */
+
+        obj_desc = acpi_ns_get_attached_object(node);
+        if (!obj_desc) {
+
+                /* No object, just exit */
+
+                return (AE_OK);
+        }
+
+        /* Devices are handled different than regions */
+
+        if (obj_desc->common.type == ACPI_TYPE_DEVICE) {
+
+                /* Check if this Device already has a handler for this address space */
+
+                next_handler_obj = obj_desc->device.handler;
+                while (next_handler_obj) {
+
+                        /* Found a handler, is it for the same address space? */
+
+                        if (next_handler_obj->address_space.space_id ==
+                            handler_obj->address_space.space_id) {
+                                ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+                                                  "Found handler for region [%s] in device %p(%p) "
+                                                  "handler %p\n",
+                                                  acpi_ut_get_region_name
+                                                  (handler_obj->address_space.
+                                                   space_id), obj_desc,
+                                                  next_handler_obj,
+                                                  handler_obj));
+
+                                /*
+                                 * Since the object we found it on was a device, then it
+                                 * means that someone has already installed a handler for
+                                 * the branch of the namespace from this device on. Just
+                                 * bail out telling the walk routine to not traverse this
+                                 * branch. This preserves the scoping rule for handlers.
+                                 */
+                                return (AE_CTRL_DEPTH);
+                        }
+
+                        /* Walk the linked list of handlers attached to this device */
+
+                        next_handler_obj = next_handler_obj->address_space.next;
+                }
+
+                /*
+                 * As long as the device didn't have a handler for this space we
+                 * don't care about it. We just ignore it and proceed.
+                 */
+                return (AE_OK);
+        }
+
+        /* Object is a Region */
+
+        if (obj_desc->region.space_id != handler_obj->address_space.space_id) {
+
+                /* This region is for a different address space, just ignore it */
+
+                return (AE_OK);
+        }
+
+        /*
+         * Now we have a region and it is for the handler's address space type.
+         *
+         * First disconnect region for any previous handler (if any)
+         */
+        acpi_ev_detach_region(obj_desc, FALSE);
+
+        /* Connect the region to the new handler */
+
+        status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE);
+        return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_install_space_handler
+ *
+ * PARAMETERS:  node            - Namespace node for the device
+ *              space_id        - The address space ID
+ *              handler         - Address of the handler
+ *              setup           - Address of the setup function
+ *              context         - Value passed to the handler on each access
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for all op_regions of a given space_id.
+ *              Assumes namespace is locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_install_space_handler(struct acpi_namespace_node * node,
+                              acpi_adr_space_type space_id,
+                              acpi_adr_space_handler handler,
+                              acpi_adr_space_setup setup, void *context)
+{
+        union acpi_operand_object *obj_desc;
+        union acpi_operand_object *handler_obj;
+        acpi_status status;
+        acpi_object_type type;
+        u8 flags = 0;
+
+        ACPI_FUNCTION_TRACE(ev_install_space_handler);
+
+        /*
+         * This registration is valid for only the types below and the root. This
+         * is where the default handlers get placed.
+         */
+        if ((node->type != ACPI_TYPE_DEVICE) &&
+            (node->type != ACPI_TYPE_PROCESSOR) &&
+            (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        if (handler == ACPI_DEFAULT_HANDLER) {
+                flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
+
+                switch (space_id) {
+                case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+                        handler = acpi_ex_system_memory_space_handler;
+                        setup = acpi_ev_system_memory_region_setup;
+                        break;
+
+                case ACPI_ADR_SPACE_SYSTEM_IO:
+                        handler = acpi_ex_system_io_space_handler;
+                        setup = acpi_ev_io_space_region_setup;
+                        break;
+
+                case ACPI_ADR_SPACE_PCI_CONFIG:
+                        handler = acpi_ex_pci_config_space_handler;
+                        setup = acpi_ev_pci_config_region_setup;
+                        break;
+
+                case ACPI_ADR_SPACE_CMOS:
+                        handler = acpi_ex_cmos_space_handler;
+                        setup = acpi_ev_cmos_region_setup;
+                        break;
+
+                case ACPI_ADR_SPACE_PCI_BAR_TARGET:
+                        handler = acpi_ex_pci_bar_space_handler;
+                        setup = acpi_ev_pci_bar_region_setup;
+                        break;
+
+                case ACPI_ADR_SPACE_DATA_TABLE:
+                        handler = acpi_ex_data_table_space_handler;
+                        setup = NULL;
+                        break;
+
+                default:
+                        status = AE_BAD_PARAMETER;
+                        goto unlock_and_exit;
+                }
+        }
+
+        /* If the caller hasn't specified a setup routine, use the default */
+
+        if (!setup) {
+                setup = acpi_ev_default_region_setup;
+        }
+
+        /* Check for an existing internal object */
+
+        obj_desc = acpi_ns_get_attached_object(node);
+        if (obj_desc) {
+                /*
+                 * The attached device object already exists. Make sure the handler
+                 * is not already installed.
+                 */
+                handler_obj = obj_desc->device.handler;
+
+                /* Walk the handler list for this device */
+
+                while (handler_obj) {
+
+                        /* Same space_id indicates a handler already installed */
+
+                        if (handler_obj->address_space.space_id == space_id) {
+                                if (handler_obj->address_space.handler ==
+                                    handler) {
+                                        /*
+                                         * It is (relatively) OK to attempt to install the SAME
+                                         * handler twice. This can easily happen with the
+                                         * PCI_Config space.
+                                         */
+                                        status = AE_SAME_HANDLER;
+                                        goto unlock_and_exit;
+                                } else {
+                                        /* A handler is already installed */
+
+                                        status = AE_ALREADY_EXISTS;
+                                }
+                                goto unlock_and_exit;
+                        }
+
+                        /* Walk the linked list of handlers */
+
+                        handler_obj = handler_obj->address_space.next;
+                }
+        } else {
+                ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+                                  "Creating object on Device %p while installing handler\n",
+                                  node));
+
+                /* obj_desc does not exist, create one */
+
+                if (node->type == ACPI_TYPE_ANY) {
+                        type = ACPI_TYPE_DEVICE;
+                } else {
+                        type = node->type;
+                }
+
+                obj_desc = acpi_ut_create_internal_object(type);
+                if (!obj_desc) {
+                        status = AE_NO_MEMORY;
+                        goto unlock_and_exit;
+                }
+
+                /* Init new descriptor */
+
+                obj_desc->common.type = (u8)type;
+
+                /* Attach the new object to the Node */
+
+                status = acpi_ns_attach_object(node, obj_desc, type);
+
+                /* Remove local reference to the object */
+
+                acpi_ut_remove_reference(obj_desc);
+
+                if (ACPI_FAILURE(status)) {
+                        goto unlock_and_exit;
+                }
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
+                          "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
+                          acpi_ut_get_region_name(space_id), space_id,
+                          acpi_ut_get_node_name(node), node, obj_desc));
+
+        /*
+         * Install the handler
+         *
+         * At this point there is no existing handler. Just allocate the object
+         * for the handler and link it into the list.
+         */
+        handler_obj =
+            acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
+        if (!handler_obj) {
+                status = AE_NO_MEMORY;
+                goto unlock_and_exit;
+        }
+
+        /* Init handler obj */
+
+        handler_obj->address_space.space_id = (u8)space_id;
+        handler_obj->address_space.handler_flags = flags;
+        handler_obj->address_space.region_list = NULL;
+        handler_obj->address_space.node = node;
+        handler_obj->address_space.handler = handler;
+        handler_obj->address_space.context = context;
+        handler_obj->address_space.setup = setup;
+
+        /* Install at head of Device.address_space list */
+
+        handler_obj->address_space.next = obj_desc->device.handler;
+
+        /*
+         * The Device object is the first reference on the handler_obj.
+         * Each region that uses the handler adds a reference.
+         */
+        obj_desc->device.handler = handler_obj;
+
+        /*
+         * Walk the namespace finding all of the regions this
+         * handler will manage.
+         *
+         * Start at the device and search the branch toward
+         * the leaf nodes until either the leaf is encountered or
+         * a device is detected that has an address handler of the
+         * same type.
+         *
+         * In either case, back up and search down the remainder
+         * of the branch
+         */
+        status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX,
+                                        ACPI_NS_WALK_UNLOCK,
+                                        acpi_ev_install_handler, NULL,
+                                        handler_obj, NULL);
+
+      unlock_and_exit:
+        return_ACPI_STATUS(status);
+}