Release 4.7 drivers/acpi/acpica/evrgnini.c

/******************************************************************************
 *
 * Module Name: evrgnini- ACPI address_space (op_region) init
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2016, 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"


#define _COMPONENT          ACPI_EVENTS
ACPI_MODULE_NAME("evrgnini")

/* Local prototypes */
static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_system_memory_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Setup a system_memory operation region
 *
 ******************************************************************************/


acpi_status

acpi_ev_system_memory_region_setup(acpi_handle handle,
				   u32 function,
				   void *handler_context, void **region_context)
{
	union acpi_operand_object *region_desc =
	    (union acpi_operand_object *)handle;
	struct acpi_mem_space_context *local_region_context;

	ACPI_FUNCTION_TRACE(ev_system_memory_region_setup);

	if (function == ACPI_REGION_DEACTIVATE) {
		if (*region_context) {
			local_region_context =
			    (struct acpi_mem_space_context *)*region_context;

			/* Delete a cached mapping if present */

			if (local_region_context->mapped_length) {
				acpi_os_unmap_memory(local_region_context->
						     mapped_logical_address,
						     local_region_context->
						     mapped_length);
			}
			ACPI_FREE(local_region_context);
			*region_context = NULL;
		}
		return_ACPI_STATUS(AE_OK);
	}

	/* Create a new context */

	local_region_context =
	    ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context));
	if (!(local_region_context)) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Save the region length and address for use in the handler */

	local_region_context->length = region_desc->region.length;
	local_region_context->address = region_desc->region.address;

	*region_context = local_region_context;
	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
60
37.74%
2
22.22%
andy grover
andy grover
48
30.19%
3
33.33%
robert moore
robert moore
33
20.75%
3
33.33%
linus torvalds
linus torvalds
18
11.32%
1
11.11%
Total
159
100.00%
9
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_io_space_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Setup a IO operation region
 *
 ******************************************************************************/


acpi_status

acpi_ev_io_space_region_setup(acpi_handle handle,
			      u32 function,
			      void *handler_context, void **region_context)
{
	ACPI_FUNCTION_TRACE(ev_io_space_region_setup);

	if (function == ACPI_REGION_DEACTIVATE) {
		*region_context = NULL;
	} else {
		*region_context = handler_context;
	}

	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
40
78.43%
2
40.00%
linus torvalds
linus torvalds
9
17.65%
1
20.00%
andy grover
andy grover
1
1.96%
1
20.00%
robert moore
robert moore
1
1.96%
1
20.00%
Total
51
100.00%
5
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_pci_config_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Setup a PCI_Config operation region
 *
 * MUTEX:       Assumes namespace is not locked
 *
 ******************************************************************************/


acpi_status

acpi_ev_pci_config_region_setup(acpi_handle handle,
				u32 function,
				void *handler_context, void **region_context)
{
	acpi_status status = AE_OK;
	u64 pci_value;
	struct acpi_pci_id *pci_id = *region_context;
	union acpi_operand_object *handler_obj;
	struct acpi_namespace_node *parent_node;
	struct acpi_namespace_node *pci_root_node;
	struct acpi_namespace_node *pci_device_node;
	union acpi_operand_object *region_obj =
	    (union acpi_operand_object *)handle;

	ACPI_FUNCTION_TRACE(ev_pci_config_region_setup);

	handler_obj = region_obj->region.handler;
	if (!handler_obj) {
		/*
                 * No installed handler. This shouldn't happen because the dispatch
                 * routine checks before we get here, but we check again just in case.
                 */
		ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
				  "Attempting to init a region %p, with no handler\n",
				  region_obj));
		return_ACPI_STATUS(AE_NOT_EXIST);
	}

	*region_context = NULL;
	if (function == ACPI_REGION_DEACTIVATE) {
		if (pci_id) {
			ACPI_FREE(pci_id);
		}
		return_ACPI_STATUS(status);
	}

	parent_node = region_obj->region.node->parent;

	/*
         * Get the _SEG and _BBN values from the device upon which the handler
         * is installed.
         *
         * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
         * This is the device the handler has been registered to handle.
         */

	/*
         * If the address_space.Node is still pointing to the root, we need
         * to scan upward for a PCI Root bridge and re-associate the op_region
         * handlers with that device.
         */
	if (handler_obj->address_space.node == acpi_gbl_root_node) {

		/* Start search from the parent object */

		pci_root_node = parent_node;
		while (pci_root_node != acpi_gbl_root_node) {

			/* Get the _HID/_CID in order to detect a root_bridge */

			if (acpi_ev_is_pci_root_bridge(pci_root_node)) {

				/* Install a handler for this PCI root bridge */

				status = acpi_install_address_space_handler((acpi_handle)pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
				if (ACPI_FAILURE(status)) {
					if (status == AE_SAME_HANDLER) {
						/*
                                                 * It is OK if the handler is already installed on the
                                                 * root bridge. Still need to return a context object
                                                 * for the new PCI_Config operation region, however.
                                                 */
						status = AE_OK;
					} else {
						ACPI_EXCEPTION((AE_INFO, status,
								"Could not install PciConfig handler "
								"for Root Bridge %4.4s",
								acpi_ut_get_node_name
								(pci_root_node)));
					}
				}
				break;
			}

			pci_root_node = pci_root_node->parent;
		}

		/* PCI root bridge not found, use namespace root node */
	} else {
		pci_root_node = handler_obj->address_space.node;
	}

	/*
         * If this region is now initialized, we are done.
         * (install_address_space_handler could have initialized it)
         */
	if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Region is still not initialized. Create a new context */

	pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id));
	if (!pci_id) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/*
         * For PCI_Config space access, we need the segment, bus, device and
         * function numbers. Acquire them here.
         *
         * Find the parent device object. (This allows the operation region to be
         * within a subscope under the device, such as a control method.)
         */
	pci_device_node = region_obj->region.node;
	while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) {
		pci_device_node = pci_device_node->parent;
	}

	if (!pci_device_node) {
		ACPI_FREE(pci_id);
		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
	}

	/*
         * Get the PCI device and function numbers from the _ADR object
         * contained in the parent's scope.
         */
	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR,
						 pci_device_node, &pci_value);

	/*
         * The default is zero, and since the allocation above zeroed the data,
         * just do nothing on failure.
         */
	if (ACPI_SUCCESS(status)) {
		pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value));
		pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value));
	}

	/* The PCI segment number comes from the _SEG method */

	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG,
						 pci_root_node, &pci_value);
	if (ACPI_SUCCESS(status)) {
		pci_id->segment = ACPI_LOWORD(pci_value);
	}

	/* The PCI bus number comes from the _BBN method */

	status = acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN,
						 pci_root_node, &pci_value);
	if (ACPI_SUCCESS(status)) {
		pci_id->bus = ACPI_LOWORD(pci_value);
	}

	/* Complete/update the PCI ID for this device */

	status =
	    acpi_hw_derive_pci_id(pci_id, pci_root_node,
				  region_obj->region.node);
	if (ACPI_FAILURE(status)) {
		ACPI_FREE(pci_id);
		return_ACPI_STATUS(status);
	}

	*region_context = pci_id;
	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andy grover
andy grover
178
35.39%
6
24.00%
pre-git
pre-git
175
34.79%
3
12.00%
robert moore
robert moore
88
17.50%
9
36.00%
linus torvalds
linus torvalds
47
9.34%
3
12.00%
alexey starikovskiy
alexey starikovskiy
6
1.19%
1
4.00%
jesper juhl
jesper juhl
5
0.99%
1
4.00%
len brown
len brown
4
0.80%
2
8.00%
Total
503
100.00%
25
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_is_pci_root_bridge
 *
 * PARAMETERS:  node            - Device node being examined
 *
 * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
 *
 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
 *              examining the _HID and _CID for the device.
 *
 ******************************************************************************/



static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node)
{
	acpi_status status;
	struct acpi_pnp_device_id *hid;
	struct acpi_pnp_device_id_list *cid;
	u32 i;
	u8 match;

	/* Get the _HID and check for a PCI Root Bridge */

	status = acpi_ut_execute_HID(node, &hid);
	if (ACPI_FAILURE(status)) {
		return (FALSE);
	}

	match = acpi_ut_is_pci_root_bridge(hid->string);
	ACPI_FREE(hid);

	if (match) {
		return (TRUE);
	}

	/* The _HID did not match. Get the _CID and check for a PCI Root Bridge */

	status = acpi_ut_execute_CID(node, &cid);
	if (ACPI_FAILURE(status)) {
		return (FALSE);
	}

	/* Check all _CIDs in the returned list */

	for (i = 0; i < cid->count; i++) {
		if (acpi_ut_is_pci_root_bridge(cid->ids[i].string)) {
			ACPI_FREE(cid);
			return (TRUE);
		}
	}

	ACPI_FREE(cid);
	return (FALSE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
robert moore
robert moore
157
98.74%
4
80.00%
lv zheng
lv zheng
2
1.26%
1
20.00%
Total
159
100.00%
5
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_pci_bar_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Setup a pci_BAR operation region
 *
 * MUTEX:       Assumes namespace is not locked
 *
 ******************************************************************************/


acpi_status

acpi_ev_pci_bar_region_setup(acpi_handle handle,
			     u32 function,
			     void *handler_context, void **region_context)
{
	ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup);

	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
28
93.33%
1
33.33%
andy grover
andy grover
1
3.33%
1
33.33%
robert moore
robert moore
1
3.33%
1
33.33%
Total
30
100.00%
3
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_cmos_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Setup a CMOS operation region
 *
 * MUTEX:       Assumes namespace is not locked
 *
 ******************************************************************************/


acpi_status

acpi_ev_cmos_region_setup(acpi_handle handle,
			  u32 function,
			  void *handler_context, void **region_context)
{
	ACPI_FUNCTION_TRACE(ev_cmos_region_setup);

	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
28
93.33%
1
33.33%
robert moore
robert moore
1
3.33%
1
33.33%
andy grover
andy grover
1
3.33%
1
33.33%
Total
30
100.00%
3
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_default_region_setup
 *
 * PARAMETERS:  handle              - Region we are interested in
 *              function            - Start or stop
 *              handler_context     - Address space handler context
 *              region_context      - Region specific context
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Default region initialization
 *
 ******************************************************************************/


acpi_status

acpi_ev_default_region_setup(acpi_handle handle,
			     u32 function,
			     void *handler_context, void **region_context)
{
	ACPI_FUNCTION_TRACE(ev_default_region_setup);

	if (function == ACPI_REGION_DEACTIVATE) {
		*region_context = NULL;
	} else {
		*region_context = handler_context;
	}

	return_ACPI_STATUS(AE_OK);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
40
78.43%
2
40.00%
linus torvalds
linus torvalds
9
17.65%
1
20.00%
andy grover
andy grover
1
1.96%
1
20.00%
robert moore
robert moore
1
1.96%
1
20.00%
Total
51
100.00%
5
100.00%

/*******************************************************************************
 *
 * FUNCTION:    acpi_ev_initialize_region
 *
 * PARAMETERS:  region_obj      - Region we are initializing
 *              acpi_ns_locked  - Is namespace locked?
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
 *              for execution at a later time
 *
 *              Get the appropriate address space handler for a newly
 *              created region.
 *
 *              This also performs address space specific initialization. For
 *              example, PCI regions must have an _ADR object that contains
 *              a PCI address in the scope of the definition. This address is
 *              required to perform an access to PCI config space.
 *
 * MUTEX:       Interpreter should be unlocked, because we may run the _REG
 *              method for this region.
 *
 ******************************************************************************/


acpi_status

acpi_ev_initialize_region(union acpi_operand_object *region_obj,
			  u8 acpi_ns_locked)
{
	union acpi_operand_object *handler_obj;
	union acpi_operand_object *obj_desc;
	acpi_adr_space_type space_id;
	struct acpi_namespace_node *node;
	acpi_status status;

	ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked);

	if (!region_obj) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) {
		return_ACPI_STATUS(AE_OK);
	}

	region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED;

	node = region_obj->region.node->parent;
	space_id = region_obj->region.space_id;

	/*
         * The following loop depends upon the root Node having no parent
         * ie: acpi_gbl_root_node->Parent being set to NULL
         */
	while (node) {

		/* Check to see if a handler exists */

		handler_obj = NULL;
		obj_desc = acpi_ns_get_attached_object(node);
		if (obj_desc) {

			/* Can only be a handler if the object exists */

			switch (node->type) {
			case ACPI_TYPE_DEVICE:
			case ACPI_TYPE_PROCESSOR:
			case ACPI_TYPE_THERMAL:

				handler_obj = obj_desc->common_notify.handler;
				break;

			case ACPI_TYPE_METHOD:
				/*
                                 * If we are executing module level code, the original
                                 * Node's object was replaced by this Method object and we
                                 * saved the handler in the method object.
                                 *
                                 * See acpi_ns_exec_module_code
                                 */
				if (obj_desc->method.
				    info_flags & ACPI_METHOD_MODULE_LEVEL) {
					handler_obj =
					    obj_desc->method.dispatch.handler;
				}
				break;

			default:

				/* Ignore other objects */

				break;
			}

			handler_obj =
			    acpi_ev_find_region_handler(space_id, handler_obj);
			if (handler_obj) {

				/* Found correct handler */

				ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
						  "Found handler %p for region %p in obj %p\n",
						  handler_obj, region_obj,
						  obj_desc));

				status =
				    acpi_ev_attach_region(handler_obj,
							  region_obj,
							  acpi_ns_locked);

				/*
                                 * Tell all users that this region is usable by
                                 * running the _REG method
                                 */
				if (acpi_ns_locked) {
					status =
					    acpi_ut_release_mutex
					    (ACPI_MTX_NAMESPACE);
					if (ACPI_FAILURE(status)) {
						return_ACPI_STATUS(status);
					}
				}

				status =
				    acpi_ev_execute_reg_method(region_obj,
							       ACPI_REG_CONNECT);

				if (acpi_ns_locked) {
					status =
					    acpi_ut_acquire_mutex
					    (ACPI_MTX_NAMESPACE);
					if (ACPI_FAILURE(status)) {
						return_ACPI_STATUS(status);
					}
				}

				return_ACPI_STATUS(AE_OK);
			}
		}

		/* This node does not have the handler we need; Pop up one level */

		node = node->parent;
	}

	/* If we get here, there is no handler for this region */

	ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
			  "No handler for RegionType %s(%X) (RegionObj %p)\n",
			  acpi_ut_get_region_name(space_id), space_id,
			  region_obj));

	return_ACPI_STATUS(AE_NOT_EXIST);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
117
36.56%
2
10.00%
len brown
len brown
63
19.69%
1
5.00%
linus torvalds
linus torvalds
53
16.56%
1
5.00%
andy grover
andy grover
34
10.62%
6
30.00%
lin ming
lin ming
27
8.44%
2
10.00%
lv zheng
lv zheng
17
5.31%
3
15.00%
robert moore
robert moore
5
1.56%
4
20.00%
alexey starikovskiy
alexey starikovskiy
4
1.25%
1
5.00%
Total
320
100.00%
20
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
444
33.04%
3
6.98%
robert moore
robert moore
309
22.99%
17
39.53%
andy grover
andy grover
266
19.79%
8
18.60%
linus torvalds
linus torvalds
193
14.36%
3
6.98%
len brown
len brown
70
5.21%
3
6.98%
lin ming
lin ming
27
2.01%
2
4.65%
lv zheng
lv zheng
19
1.41%
4
9.30%
alexey starikovskiy
alexey starikovskiy
10
0.74%
1
2.33%
jesper juhl
jesper juhl
5
0.37%
1
2.33%
patrick mochel
patrick mochel
1
0.07%
1
2.33%
Total
1344
100.00%
43
100.00%
  
Directory: drivers/acpi/acpica

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.