diff options
Diffstat (limited to 'drivers/acpi/resources/rsxface.c')
| -rw-r--r-- | drivers/acpi/resources/rsxface.c | 368 |
1 files changed, 208 insertions, 160 deletions
diff --git a/drivers/acpi/resources/rsxface.c b/drivers/acpi/resources/rsxface.c index 8c1628c12cc8..1999e2ab7daa 100644 --- a/drivers/acpi/resources/rsxface.c +++ b/drivers/acpi/resources/rsxface.c @@ -43,6 +43,7 @@ #include <acpi/acpi.h> #include <acpi/acresrc.h> +#include <acpi/acnamesp.h> #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME("rsxface") @@ -66,19 +67,80 @@ ACPI_MODULE_NAME("rsxface") 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_map_handle_to_node(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 - a handle to the Bus device we are querying - * ret_buffer - a pointer to a buffer to receive the + * 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 + * 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 @@ -94,25 +156,18 @@ 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); - /* - * Must have a valid handle and buffer, So we have to have a handle - * and a return buffer structure, and 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, so keep going. - */ - if (!device_handle) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } + /* Validate parameters then dispatch to internal routine */ - status = acpi_ut_validate_buffer(ret_buffer); + 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(device_handle, ret_buffer); + status = acpi_rs_get_prt_method_data(node, ret_buffer); return_ACPI_STATUS(status); } @@ -122,16 +177,16 @@ ACPI_EXPORT_SYMBOL(acpi_get_irq_routing_table) * * FUNCTION: acpi_get_current_resources * - * PARAMETERS: device_handle - a handle to the device object for the + * PARAMETERS: device_handle - Handle to the device object for the * device we are querying - * ret_buffer - a pointer to a buffer to receive the + * 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 + * 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 @@ -146,25 +201,18 @@ 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); - /* - * Must have a valid handle and buffer, So we have to have a handle - * and a return buffer structure, and 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, so keep going. - */ - if (!device_handle) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } + /* Validate parameters then dispatch to internal routine */ - status = acpi_ut_validate_buffer(ret_buffer); + 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(device_handle, ret_buffer); + status = acpi_rs_get_crs_method_data(node, ret_buffer); return_ACPI_STATUS(status); } @@ -175,16 +223,16 @@ ACPI_EXPORT_SYMBOL(acpi_get_current_resources) * * FUNCTION: acpi_get_possible_resources * - * PARAMETERS: device_handle - a handle to the device object for the + * PARAMETERS: device_handle - Handle to the device object for the * device we are querying - * ret_buffer - a pointer to a buffer to receive the + * 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 + * 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 @@ -196,25 +244,18 @@ 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); - /* - * Must have a valid handle and buffer, So we have to have a handle - * and a return buffer structure, and 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, so keep going. - */ - if (!device_handle) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } + /* Validate parameters then dispatch to internal routine */ - status = acpi_ut_validate_buffer(ret_buffer); + 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(device_handle, ret_buffer); + status = acpi_rs_get_prs_method_data(node, ret_buffer); return_ACPI_STATUS(status); } @@ -223,113 +264,18 @@ ACPI_EXPORT_SYMBOL(acpi_get_possible_resources) /******************************************************************************* * - * 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 or METHOD_NAME__PRS) - * 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; - struct acpi_resource *resource; - struct acpi_resource *resource_end; - - 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))) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Get the _CRS or _PRS 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); - } - - /* Buffer now contains the resource list */ - - 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 */ - - if (resource->type > ACPI_RESOURCE_TYPE_MAX) { - status = AE_AML_INVALID_RESOURCE_TYPE; - break; - } - - /* 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_ADD_PTR(struct acpi_resource, resource, - resource->length); - } - - ACPI_FREE(buffer.pointer); - return_ACPI_STATUS(status); -} - -ACPI_EXPORT_SYMBOL(acpi_walk_resources) - -/******************************************************************************* - * * FUNCTION: acpi_set_current_resources * - * PARAMETERS: device_handle - a handle to the device object for the - * device we are changing the resources of - * in_buffer - a pointer to a buffer containing the + * 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 + * 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. * ******************************************************************************/ @@ -338,17 +284,24 @@ 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); - /* Must have a valid handle and buffer */ + /* Validate the buffer, don't allow zero length */ - if ((!device_handle) || - (!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) { + if ((!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) { return_ACPI_STATUS(AE_BAD_PARAMETER); } - status = acpi_rs_set_srs_method_data(device_handle, in_buffer); + /* 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); } @@ -358,15 +311,14 @@ ACPI_EXPORT_SYMBOL(acpi_set_current_resources) * * FUNCTION: acpi_resource_to_address64 * - * PARAMETERS: Resource - Pointer to a resource - * Out - Pointer to the users's return - * buffer (a struct - * struct acpi_resource_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 + * copy it to the address64 return buffer. This saves the * caller from having to duplicate code for different-sized * addresses. * @@ -418,12 +370,12 @@ 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 + * 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 * @@ -525,3 +477,99 @@ acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context) } ACPI_EXPORT_SYMBOL(acpi_rs_match_vendor_resource) + +/******************************************************************************* + * + * 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 or METHOD_NAME__PRS) + * 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; + struct acpi_resource *resource; + struct acpi_resource *resource_end; + + 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))) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Get the _CRS or _PRS 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); + } + + /* Buffer now contains the resource list */ + + 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 */ + + if (resource->type > ACPI_RESOURCE_TYPE_MAX) { + status = AE_AML_INVALID_RESOURCE_TYPE; + break; + } + + /* 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_ADD_PTR(struct acpi_resource, resource, + resource->length); + } + + ACPI_FREE(buffer.pointer); + return_ACPI_STATUS(status); +} + +ACPI_EXPORT_SYMBOL(acpi_walk_resources) |