0,0 → 1,663 |
/******************************************************************************* |
* |
* Module Name: rsxface - Public interfaces to the resource manager |
* |
******************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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. |
*/ |
|
#define EXPORT_ACPI_INTERFACES |
|
#include <acpi/acpi.h> |
#include "accommon.h" |
#include "acresrc.h" |
#include "acnamesp.h" |
|
#define _COMPONENT ACPI_RESOURCES |
ACPI_MODULE_NAME("rsxface") |
|
/* Local macros for 16,32-bit to 64-bit conversion */ |
#define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) |
#define ACPI_COPY_ADDRESS(out, in) \ |
ACPI_COPY_FIELD(out, in, resource_type); \ |
ACPI_COPY_FIELD(out, in, producer_consumer); \ |
ACPI_COPY_FIELD(out, in, decode); \ |
ACPI_COPY_FIELD(out, in, min_address_fixed); \ |
ACPI_COPY_FIELD(out, in, max_address_fixed); \ |
ACPI_COPY_FIELD(out, in, info); \ |
ACPI_COPY_FIELD(out, in, address.granularity); \ |
ACPI_COPY_FIELD(out, in, address.minimum); \ |
ACPI_COPY_FIELD(out, in, address.maximum); \ |
ACPI_COPY_FIELD(out, in, address.translation_offset); \ |
ACPI_COPY_FIELD(out, in, address.address_length); \ |
ACPI_COPY_FIELD(out, in, resource_source); |
/* Local prototypes */ |
static acpi_status |
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context); |
|
static acpi_status |
acpi_rs_validate_parameters(acpi_handle device_handle, |
struct acpi_buffer *buffer, |
struct acpi_namespace_node **return_node); |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_rs_validate_parameters |
* |
* PARAMETERS: device_handle - Handle to a device |
* buffer - Pointer to a data buffer |
* return_node - Pointer to where the device node is returned |
* |
* RETURN: Status |
* |
* DESCRIPTION: Common parameter validation for resource interfaces |
* |
******************************************************************************/ |
|
static acpi_status |
acpi_rs_validate_parameters(acpi_handle device_handle, |
struct acpi_buffer *buffer, |
struct acpi_namespace_node **return_node) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(rs_validate_parameters); |
|
/* |
* Must have a valid handle to an ACPI device |
*/ |
if (!device_handle) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
node = acpi_ns_validate_handle(device_handle); |
if (!node) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
if (node->type != ACPI_TYPE_DEVICE) { |
return_ACPI_STATUS(AE_TYPE); |
} |
|
/* |
* Validate the user buffer object |
* |
* if there is a non-zero buffer length we also need a valid pointer in |
* the buffer. If it's a zero buffer length, we'll be returning the |
* needed buffer size (later), so keep going. |
*/ |
status = acpi_ut_validate_buffer(buffer); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
*return_node = node; |
return_ACPI_STATUS(AE_OK); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_irq_routing_table |
* |
* PARAMETERS: device_handle - Handle to the Bus device we are querying |
* ret_buffer - Pointer to a buffer to receive the |
* current resources for the device |
* |
* RETURN: Status |
* |
* DESCRIPTION: This function is called to get the IRQ routing table for a |
* specific bus. The caller must first acquire a handle for the |
* desired bus. The routine table is placed in the buffer pointed |
* to by the ret_buffer variable parameter. |
* |
* If the function fails an appropriate status will be returned |
* and the value of ret_buffer is undefined. |
* |
* This function attempts to execute the _PRT method contained in |
* the object indicated by the passed device_handle. |
* |
******************************************************************************/ |
|
acpi_status |
acpi_get_irq_routing_table(acpi_handle device_handle, |
struct acpi_buffer *ret_buffer) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(acpi_get_irq_routing_table); |
|
/* Validate parameters then dispatch to internal routine */ |
|
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = acpi_rs_get_prt_method_data(node, ret_buffer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_current_resources |
* |
* PARAMETERS: device_handle - Handle to the device object for the |
* device we are querying |
* ret_buffer - Pointer to a buffer to receive the |
* current resources for the device |
* |
* RETURN: Status |
* |
* DESCRIPTION: This function is called to get the current resources for a |
* specific device. The caller must first acquire a handle for |
* the desired device. The resource data is placed in the buffer |
* pointed to by the ret_buffer variable parameter. |
* |
* If the function fails an appropriate status will be returned |
* and the value of ret_buffer is undefined. |
* |
* This function attempts to execute the _CRS method contained in |
* the object indicated by the passed device_handle. |
* |
******************************************************************************/ |
acpi_status |
acpi_get_current_resources(acpi_handle device_handle, |
struct acpi_buffer *ret_buffer) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(acpi_get_current_resources); |
|
/* Validate parameters then dispatch to internal routine */ |
|
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = acpi_rs_get_crs_method_data(node, ret_buffer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_current_resources) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_possible_resources |
* |
* PARAMETERS: device_handle - Handle to the device object for the |
* device we are querying |
* ret_buffer - Pointer to a buffer to receive the |
* resources for the device |
* |
* RETURN: Status |
* |
* DESCRIPTION: This function is called to get a list of the possible resources |
* for a specific device. The caller must first acquire a handle |
* for the desired device. The resource data is placed in the |
* buffer pointed to by the ret_buffer variable. |
* |
* If the function fails an appropriate status will be returned |
* and the value of ret_buffer is undefined. |
* |
******************************************************************************/ |
acpi_status |
acpi_get_possible_resources(acpi_handle device_handle, |
struct acpi_buffer *ret_buffer) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(acpi_get_possible_resources); |
|
/* Validate parameters then dispatch to internal routine */ |
|
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = acpi_rs_get_prs_method_data(node, ret_buffer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_possible_resources) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_set_current_resources |
* |
* PARAMETERS: device_handle - Handle to the device object for the |
* device we are setting resources |
* in_buffer - Pointer to a buffer containing the |
* resources to be set for the device |
* |
* RETURN: Status |
* |
* DESCRIPTION: This function is called to set the current resources for a |
* specific device. The caller must first acquire a handle for |
* the desired device. The resource data is passed to the routine |
* the buffer pointed to by the in_buffer variable. |
* |
******************************************************************************/ |
acpi_status |
acpi_set_current_resources(acpi_handle device_handle, |
struct acpi_buffer *in_buffer) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(acpi_set_current_resources); |
|
/* Validate the buffer, don't allow zero length */ |
|
if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* Validate parameters then dispatch to internal routine */ |
|
status = acpi_rs_validate_parameters(device_handle, in_buffer, &node); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = acpi_rs_set_srs_method_data(node, in_buffer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_set_current_resources) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_event_resources |
* |
* PARAMETERS: device_handle - Handle to the device object for the |
* device we are getting resources |
* in_buffer - Pointer to a buffer containing the |
* resources to be set for the device |
* |
* RETURN: Status |
* |
* DESCRIPTION: This function is called to get the event resources for a |
* specific device. The caller must first acquire a handle for |
* the desired device. The resource data is passed to the routine |
* the buffer pointed to by the in_buffer variable. Uses the |
* _AEI method. |
* |
******************************************************************************/ |
acpi_status |
acpi_get_event_resources(acpi_handle device_handle, |
struct acpi_buffer *ret_buffer) |
{ |
acpi_status status; |
struct acpi_namespace_node *node; |
|
ACPI_FUNCTION_TRACE(acpi_get_event_resources); |
|
/* Validate parameters then dispatch to internal routine */ |
|
status = acpi_rs_validate_parameters(device_handle, ret_buffer, &node); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
status = acpi_rs_get_aei_method_data(node, ret_buffer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_event_resources) |
|
/****************************************************************************** |
* |
* FUNCTION: acpi_resource_to_address64 |
* |
* PARAMETERS: resource - Pointer to a resource |
* out - Pointer to the users's return buffer |
* (a struct acpi_resource_address64) |
* |
* RETURN: Status |
* |
* DESCRIPTION: If the resource is an address16, address32, or address64, |
* copy it to the address64 return buffer. This saves the |
* caller from having to duplicate code for different-sized |
* addresses. |
* |
******************************************************************************/ |
acpi_status |
acpi_resource_to_address64(struct acpi_resource *resource, |
struct acpi_resource_address64 *out) |
{ |
struct acpi_resource_address16 *address16; |
struct acpi_resource_address32 *address32; |
|
if (!resource || !out) { |
return (AE_BAD_PARAMETER); |
} |
|
/* Convert 16 or 32 address descriptor to 64 */ |
|
switch (resource->type) { |
case ACPI_RESOURCE_TYPE_ADDRESS16: |
|
address16 = |
ACPI_CAST_PTR(struct acpi_resource_address16, |
&resource->data); |
ACPI_COPY_ADDRESS(out, address16); |
break; |
|
case ACPI_RESOURCE_TYPE_ADDRESS32: |
|
address32 = |
ACPI_CAST_PTR(struct acpi_resource_address32, |
&resource->data); |
ACPI_COPY_ADDRESS(out, address32); |
break; |
|
case ACPI_RESOURCE_TYPE_ADDRESS64: |
|
/* Simple copy for 64 bit source */ |
|
memcpy(out, &resource->data, |
sizeof(struct acpi_resource_address64)); |
break; |
|
default: |
|
return (AE_BAD_PARAMETER); |
} |
|
return (AE_OK); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_resource_to_address64) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_get_vendor_resource |
* |
* PARAMETERS: device_handle - Handle for the parent device object |
* name - Method name for the parent resource |
* (METHOD_NAME__CRS or METHOD_NAME__PRS) |
* uuid - Pointer to the UUID to be matched. |
* includes both subtype and 16-byte UUID |
* ret_buffer - Where the vendor resource is returned |
* |
* RETURN: Status |
* |
* DESCRIPTION: Walk a resource template for the specified device to find a |
* vendor-defined resource that matches the supplied UUID and |
* UUID subtype. Returns a struct acpi_resource of type Vendor. |
* |
******************************************************************************/ |
acpi_status |
acpi_get_vendor_resource(acpi_handle device_handle, |
char *name, |
struct acpi_vendor_uuid * uuid, |
struct acpi_buffer * ret_buffer) |
{ |
struct acpi_vendor_walk_info info; |
acpi_status status; |
|
/* Other parameters are validated by acpi_walk_resources */ |
|
if (!uuid || !ret_buffer) { |
return (AE_BAD_PARAMETER); |
} |
|
info.uuid = uuid; |
info.buffer = ret_buffer; |
info.status = AE_NOT_EXIST; |
|
/* Walk the _CRS or _PRS resource list for this device */ |
|
status = |
acpi_walk_resources(device_handle, name, |
acpi_rs_match_vendor_resource, &info); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
return (info.status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_get_vendor_resource) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_rs_match_vendor_resource |
* |
* PARAMETERS: acpi_walk_resource_callback |
* |
* RETURN: Status |
* |
* DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID |
* |
******************************************************************************/ |
static acpi_status |
acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context) |
{ |
struct acpi_vendor_walk_info *info = context; |
struct acpi_resource_vendor_typed *vendor; |
struct acpi_buffer *buffer; |
acpi_status status; |
|
/* Ignore all descriptors except Vendor */ |
|
if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) { |
return (AE_OK); |
} |
|
vendor = &resource->data.vendor_typed; |
|
/* |
* For a valid match, these conditions must hold: |
* |
* 1) Length of descriptor data must be at least as long as a UUID struct |
* 2) The UUID subtypes must match |
* 3) The UUID data must match |
*/ |
if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) || |
(vendor->uuid_subtype != info->uuid->subtype) || |
(memcmp(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) { |
return (AE_OK); |
} |
|
/* Validate/Allocate/Clear caller buffer */ |
|
buffer = info->buffer; |
status = acpi_ut_initialize_buffer(buffer, resource->length); |
if (ACPI_FAILURE(status)) { |
return (status); |
} |
|
/* Found the correct resource, copy and return it */ |
|
memcpy(buffer->pointer, resource, resource->length); |
buffer->length = resource->length; |
|
/* Found the desired descriptor, terminate resource walk */ |
|
info->status = AE_OK; |
return (AE_CTRL_TERMINATE); |
} |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_walk_resource_buffer |
* |
* PARAMETERS: buffer - Formatted buffer returned by one of the |
* various Get*Resource functions |
* user_function - Called for each resource |
* context - Passed to user_function |
* |
* RETURN: Status |
* |
* DESCRIPTION: Walks the input resource template. The user_function is called |
* once for each resource in the list. |
* |
******************************************************************************/ |
|
acpi_status |
acpi_walk_resource_buffer(struct acpi_buffer * buffer, |
acpi_walk_resource_callback user_function, |
void *context) |
{ |
acpi_status status = AE_OK; |
struct acpi_resource *resource; |
struct acpi_resource *resource_end; |
|
ACPI_FUNCTION_TRACE(acpi_walk_resource_buffer); |
|
/* Parameter validation */ |
|
if (!buffer || !buffer->pointer || !user_function) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* Buffer contains the resource list and length */ |
|
resource = ACPI_CAST_PTR(struct acpi_resource, buffer->pointer); |
resource_end = |
ACPI_ADD_PTR(struct acpi_resource, buffer->pointer, buffer->length); |
|
/* Walk the resource list until the end_tag is found (or buffer end) */ |
|
while (resource < resource_end) { |
|
/* Sanity check the resource type */ |
|
if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
status = AE_AML_INVALID_RESOURCE_TYPE; |
break; |
} |
|
/* Sanity check the length. It must not be zero, or we loop forever */ |
|
if (!resource->length) { |
return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); |
} |
|
/* Invoke the user function, abort on any error returned */ |
|
status = user_function(resource, context); |
if (ACPI_FAILURE(status)) { |
if (status == AE_CTRL_TERMINATE) { |
|
/* This is an OK termination by the user function */ |
|
status = AE_OK; |
} |
break; |
} |
|
/* end_tag indicates end-of-list */ |
|
if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) { |
break; |
} |
|
/* Get the next resource descriptor */ |
|
resource = ACPI_NEXT_RESOURCE(resource); |
} |
|
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_walk_resource_buffer) |
|
/******************************************************************************* |
* |
* FUNCTION: acpi_walk_resources |
* |
* PARAMETERS: device_handle - Handle to the device object for the |
* device we are querying |
* name - Method name of the resources we want. |
* (METHOD_NAME__CRS, METHOD_NAME__PRS, or |
* METHOD_NAME__AEI) |
* user_function - Called for each resource |
* context - Passed to user_function |
* |
* RETURN: Status |
* |
* DESCRIPTION: Retrieves the current or possible resource list for the |
* specified device. The user_function is called once for |
* each resource in the list. |
* |
******************************************************************************/ |
acpi_status |
acpi_walk_resources(acpi_handle device_handle, |
char *name, |
acpi_walk_resource_callback user_function, void *context) |
{ |
acpi_status status; |
struct acpi_buffer buffer; |
|
ACPI_FUNCTION_TRACE(acpi_walk_resources); |
|
/* Parameter validation */ |
|
if (!device_handle || !user_function || !name || |
(!ACPI_COMPARE_NAME(name, METHOD_NAME__CRS) && |
!ACPI_COMPARE_NAME(name, METHOD_NAME__PRS) && |
!ACPI_COMPARE_NAME(name, METHOD_NAME__AEI))) { |
return_ACPI_STATUS(AE_BAD_PARAMETER); |
} |
|
/* Get the _CRS/_PRS/_AEI resource list */ |
|
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; |
status = acpi_rs_get_method_data(device_handle, name, &buffer); |
if (ACPI_FAILURE(status)) { |
return_ACPI_STATUS(status); |
} |
|
/* Walk the resource list and cleanup */ |
|
status = acpi_walk_resource_buffer(&buffer, user_function, context); |
ACPI_FREE(buffer.pointer); |
return_ACPI_STATUS(status); |
} |
|
ACPI_EXPORT_SYMBOL(acpi_walk_resources) |